!***************************************************************************************** !> author: Jacob Williams ! license: BSD ! ! This module provides a low-level interface for manipulation of JSON data. ! The two public entities are [[json_value]], and [[json_core(type)]]. ! The [[json_file_module]] provides a higher-level interface to some ! of these routines. ! !### License ! * JSON-Fortran is released under a BSD-style license. ! See the [LICENSE](https://github.com/jacobwilliams/json-fortran/blob/master/LICENSE) ! file for details. module json_value_module use,intrinsic :: iso_fortran_env, only: iostat_end,error_unit,output_unit use json_kinds use json_parameters use json_string_utilities implicit none private #include "json_macros.inc" !********************************************************* !> ! If Unicode is not enabled, then ! JSON files are opened using access='STREAM' and ! form='UNFORMATTED'. This allows the file to ! be read faster. ! #ifdef USE_UCS4 logical,parameter :: use_unformatted_stream = .false. #else logical,parameter :: use_unformatted_stream = .true. #endif !********************************************************* !********************************************************* !> ! If Unicode is not enabled, then ! JSON files are opened using access='STREAM' and ! form='UNFORMATTED'. This allows the file to ! be read faster. ! #ifdef USE_UCS4 character(kind=CDK,len=*),parameter :: access_spec = 'SEQUENTIAL' #else character(kind=CDK,len=*),parameter :: access_spec = 'STREAM' #endif !********************************************************* !********************************************************* !> ! If Unicode is not enabled, then ! JSON files are opened using access='STREAM' and ! form='UNFORMATTED'. This allows the file to ! be read faster. ! #ifdef USE_UCS4 character(kind=CDK,len=*),parameter :: form_spec = 'FORMATTED' #else character(kind=CDK,len=*),parameter :: form_spec = 'UNFORMATTED' #endif !********************************************************* !********************************************************* !> ! Type used to construct the linked-list JSON structure. ! Normally, this should always be a pointer variable. ! This type should only be used by an instance of [[json_core(type)]]. ! !### Example ! ! The following test program: ! !````fortran ! program test ! use json_module ! implicit none ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%create_object(p,'') !create the root ! call json%add(p,'year',1805) !add some data ! call json%add(p,'value',1.0_RK) !add some data ! call json%print(p,'test.json') !write it to a file ! call json%destroy(p) !cleanup ! end program test !```` ! ! Produces the JSON file **test.json**: ! !````json ! { ! "year": 1805, ! "value": 0.1E+1 ! } !```` ! !@warning Pointers of this type should only be allocated ! using the methods from [[json_core(type)]]. type,public :: json_value !force the constituents to be stored contiguously ![note: on Intel, the order of the variables below ! is significant to avoid the misaligned field warnings] sequence private !for the linked list: type(json_value),pointer :: previous => null() !! previous item in the list type(json_value),pointer :: next => null() !! next item in the list type(json_value),pointer :: parent => null() !! parent item of this type(json_value),pointer :: children => null() !! first child item of this type(json_value),pointer :: tail => null() !! last child item of this character(kind=CK,len=:),allocatable :: name !! variable name (unescaped) real(RK),allocatable :: dbl_value !! real data for this variable logical(LK),allocatable :: log_value !! logical data for this variable character(kind=CK,len=:),allocatable :: str_value !! string data for this variable !! (unescaped) integer(IK),allocatable :: int_value !! integer data for this variable integer(IK) :: var_type = json_unknown !! variable type integer(IK),private :: n_children = 0 !! number of children end type json_value !********************************************************* !********************************************************* !> ! To access the core routines for manipulation ! of [[json_value]] pointer variables. This class allows ! for thread safe use of the module. ! !### Usage !````fortran ! program test ! use json_module ! implicit none ! type(json_core) :: json !<--have to declare this ! type(json_value),pointer :: p ! call json%create_object(p,'') !create the root ! call json%add(p,'year',1805) !add some data ! call json%add(p,'value',1.0_RK) !add some data ! call json%print(p,'test.json') !write it to a file ! call json%destroy(p) !cleanup ! end program test !```` type,public :: json_core private integer(IK) :: spaces_per_tab = 2 !! number of spaces for indenting logical(LK) :: compact_real = .true. !! to use the "compact" form of real !! numbers for output character(kind=CDK,len=:),allocatable :: real_fmt !! the format string to use !! for converting real numbers to strings. !! It can be set in [[json_initialize]], !! and used in [[json_value_print]] !! If not set, then `default_real_fmt` !! is used instead. logical(LK) :: is_verbose = .false. !! if true, all exceptions are !! immediately printed to console. logical(LK) :: stop_on_error = .false. !! if true, then the program is !! stopped immediately when an !! exception is raised. logical(LK) :: exception_thrown = .false. !! The error flag. Will be set to true !! when an error is thrown in the class. !! Many of the methods will check this !! and return immediately if it is true. character(kind=CK,len=:),allocatable :: err_message !! the error message. !! if `exception_thrown=False` then !! this variable is not allocated. integer(IK) :: char_count = 0 !! character position in the current line integer(IK) :: line_count = 1 !! lines read counter integer(IK) :: pushed_index = 0 !! used when parsing lines in file character(kind=CK,len=pushed_char_size) :: pushed_char = CK_'' !! used when parsing !! lines in file integer(IK) :: ipos = 1 !! for allocatable strings: next character to read logical(LK) :: strict_type_checking = .false. !! if true, then no type conversions are done !! in the `get` routines if the actual variable !! type is different from the return type (for !! example, integer to double). logical(LK) :: trailing_spaces_significant = .false. !! for name and path comparisons, if trailing !! space is to be considered significant. logical(LK) :: case_sensitive_keys = .true. !! if name and path comparisons !! are case sensitive. logical(LK) :: no_whitespace = .false. !! when printing a JSON string, don't include !! non-significant spaces or line breaks. !! If true, the entire structure will be !! printed on one line. logical(LK) :: unescaped_strings = .true. !! If false, then the escaped !! string is returned from [[json_get_string]] !! and similar routines. If true [default], !! then the string is returned unescaped. logical(LK) :: allow_comments = .true. !! if true, any comments will be ignored when !! parsing a file. The comment token is defined !! by the `comment_char` character variable. character(kind=CK,len=1) :: comment_char = CK_'!' !! comment token when !! `allow_comments` is true. !! Examples: '`!`' or '`#`'. integer(IK) :: path_mode = 1_IK !! How the path strings are interpreted in the !! `get_by_path` routines: !! !! * 1 -- Default mode (see [[json_get_by_path_default]]) !! * 2 -- as RFC 6901 "JSON Pointer" paths !! (see [[json_get_by_path_rfc6901]]) !! * 3 -- JSONPath "bracket-notation" !! see [[json_get_by_path_jsonpath_bracket]]) character(kind=CK,len=1) :: path_separator = dot !! The `path` separator to use !! in the "default" mode for !! the paths in the various !! `get_by_path` routines. !! Note: if `path_mode/=1` !! then this is ignored. logical(LK) :: compress_vectors = .false. !! If true, then arrays of integers, !! nulls, doubles, & logicals are !! printed all on one line. !! [Note: `no_whitespace` will !! override this option if necessary] logical(LK) :: allow_duplicate_keys = .true. !! If False, then after parsing, if any !! duplicate keys are found, an error is !! thrown. A call to [[json_value_validate]] !! will also check for duplicates. If True !! [default] then no special checks are done logical(LK) :: escape_solidus = .false. !! If True then the solidus "`/`" is always escaped !! ("`\/`") when serializing JSON. !! If False [default], then it is not escaped. !! Note that this option does not affect parsing !! (both escaped and unescaped versions are still !! valid in all cases). contains private !> ! Return a child of a [[json_value]] structure. generic,public :: get_child => json_value_get_child_by_index, & json_value_get_child,& MAYBEWRAP(json_value_get_child_by_name) procedure,private :: json_value_get_child_by_index procedure,private :: MAYBEWRAP(json_value_get_child_by_name) procedure,private :: json_value_get_child !> ! Add objects to a linked list of [[json_value]]s. ! !@note It might make more sense to call this `add_child`. generic,public :: add => json_value_add_member, & MAYBEWRAP(json_value_add_null), & MAYBEWRAP(json_value_add_integer), & MAYBEWRAP(json_value_add_integer_vec), & MAYBEWRAP(json_value_add_double), & MAYBEWRAP(json_value_add_double_vec), & MAYBEWRAP(json_value_add_logical), & MAYBEWRAP(json_value_add_logical_vec), & MAYBEWRAP(json_value_add_string), & MAYBEWRAP(json_value_add_string_vec) #ifdef USE_UCS4 generic,public :: add => json_value_add_string_name_ascii, & json_value_add_string_val_ascii, & json_value_add_string_vec_name_ascii, & json_value_add_string_vec_val_ascii #endif procedure,private :: json_value_add_member procedure,private :: MAYBEWRAP(json_value_add_integer) procedure,private :: MAYBEWRAP(json_value_add_null) procedure,private :: MAYBEWRAP(json_value_add_integer_vec) procedure,private :: MAYBEWRAP(json_value_add_double) procedure,private :: MAYBEWRAP(json_value_add_double_vec) procedure,private :: MAYBEWRAP(json_value_add_logical) procedure,private :: MAYBEWRAP(json_value_add_logical_vec) procedure,private :: MAYBEWRAP(json_value_add_string) procedure,private :: MAYBEWRAP(json_value_add_string_vec) #ifdef USE_UCS4 procedure,private :: json_value_add_string_name_ascii procedure,private :: json_value_add_string_val_ascii procedure,private :: json_value_add_string_vec_name_ascii procedure,private :: json_value_add_string_vec_val_ascii #endif !> ! These are like the `add` methods, except if a variable with the ! same path is already present, then its value is simply updated. ! Note that currently, these only work for scalar variables. ! These routines can also change the variable's type (but an error will be ! thrown if the existing variable is not a scalar). ! !### See also ! * [[json_core(type):add_by_path]] - this one can be used to change ! arrays and objects to scalars if so desired. ! !@note Unlike some routines, the `found` output is not optional, ! so it doesn't present exceptions from being thrown. ! !@note These have been mostly supplanted by the [[json_core(type):add_by_path]] ! methods, which do a similar thing (and can be used for ! scalars and vectors, etc.) generic,public :: update => MAYBEWRAP(json_update_logical),& MAYBEWRAP(json_update_double),& MAYBEWRAP(json_update_integer),& MAYBEWRAP(json_update_string) #ifdef USE_UCS4 generic,public :: update => json_update_string_name_ascii,& json_update_string_val_ascii #endif procedure,private :: MAYBEWRAP(json_update_logical) procedure,private :: MAYBEWRAP(json_update_double) procedure,private :: MAYBEWRAP(json_update_integer) procedure,private :: MAYBEWRAP(json_update_string) #ifdef USE_UCS4 procedure,private :: json_update_string_name_ascii procedure,private :: json_update_string_val_ascii #endif !> ! Add variables to a [[json_value]] linked list ! by specifying their paths. ! !### Example ! !````fortran ! use, intrinsic :: iso_fortran_env, only: output_unit, wp=>real64 ! use json_module ! type(json_core) :: json ! type(json_value) :: p ! call json%create_object(p,'root') ! create the root ! ! now add some variables using the paths: ! call json%add_by_path(p,'inputs.t', 0.0_wp ) ! call json%add_by_path(p,'inputs.x(1)', 100.0_wp) ! call json%add_by_path(p,'inputs.x(2)', 200.0_wp) ! call json%print(p,output_unit) ! now print to console !```` ! !### Notes ! * This uses [[json_create_by_path]] ! !### See also ! * The `json_core%update` methods. ! * [[json_create_by_path]] generic,public :: add_by_path => MAYBEWRAP(json_add_member_by_path),& MAYBEWRAP(json_add_integer_by_path),& MAYBEWRAP(json_add_double_by_path),& MAYBEWRAP(json_add_logical_by_path),& MAYBEWRAP(json_add_string_by_path),& MAYBEWRAP(json_add_integer_vec_by_path),& MAYBEWRAP(json_add_double_vec_by_path),& MAYBEWRAP(json_add_logical_vec_by_path),& MAYBEWRAP(json_add_string_vec_by_path) #ifdef USE_UCS4 generic,public :: add_by_path => json_add_string_by_path_value_ascii,& json_add_string_by_path_path_ascii,& json_add_string_vec_by_path_value_ascii,& json_add_string_vec_by_path_path_ascii #endif procedure :: MAYBEWRAP(json_add_member_by_path) procedure :: MAYBEWRAP(json_add_integer_by_path) procedure :: MAYBEWRAP(json_add_double_by_path) procedure :: MAYBEWRAP(json_add_logical_by_path) procedure :: MAYBEWRAP(json_add_string_by_path) procedure :: MAYBEWRAP(json_add_integer_vec_by_path) procedure :: MAYBEWRAP(json_add_double_vec_by_path) procedure :: MAYBEWRAP(json_add_logical_vec_by_path) procedure :: MAYBEWRAP(json_add_string_vec_by_path) #ifdef USE_UCS4 procedure :: json_add_string_by_path_value_ascii procedure :: json_add_string_by_path_path_ascii procedure :: json_add_string_vec_by_path_value_ascii procedure :: json_add_string_vec_by_path_path_ascii #endif !> ! Create a [[json_value]] linked list using the ! path to the variables. Optionally return a ! pointer to the variable. ! ! (This will create a `null` variable) ! !### See also ! * [[json_core(type):add_by_path]] generic,public :: create => MAYBEWRAP(json_create_by_path) procedure :: MAYBEWRAP(json_create_by_path) !> ! Get data from a [[json_value]] linked list. ! !@note There are two versions (e.g. [[json_get_integer]] and [[json_get_integer_by_path]]). ! The first one gets the value from the [[json_value]] passed into the routine, ! while the second one gets the value from the [[json_value]] found by parsing the ! path. The path version is split up into unicode and non-unicode versions. generic,public :: get => & MAYBEWRAP(json_get_by_path), & json_get_integer, MAYBEWRAP(json_get_integer_by_path), & json_get_integer_vec, MAYBEWRAP(json_get_integer_vec_by_path), & json_get_double, MAYBEWRAP(json_get_double_by_path), & json_get_double_vec, MAYBEWRAP(json_get_double_vec_by_path), & json_get_logical, MAYBEWRAP(json_get_logical_by_path), & json_get_logical_vec, MAYBEWRAP(json_get_logical_vec_by_path), & json_get_string, MAYBEWRAP(json_get_string_by_path), & json_get_string_vec, MAYBEWRAP(json_get_string_vec_by_path), & json_get_alloc_string_vec,MAYBEWRAP(json_get_alloc_string_vec_by_path),& json_get_array, MAYBEWRAP(json_get_array_by_path) procedure,private :: json_get_integer procedure,private :: json_get_integer_vec procedure,private :: json_get_double procedure,private :: json_get_double_vec procedure,private :: json_get_logical procedure,private :: json_get_logical_vec procedure,private :: json_get_string procedure,private :: json_get_string_vec procedure,private :: json_get_alloc_string_vec procedure,private :: json_get_array procedure,private :: MAYBEWRAP(json_get_by_path) procedure,private :: MAYBEWRAP(json_get_integer_by_path) procedure,private :: MAYBEWRAP(json_get_integer_vec_by_path) procedure,private :: MAYBEWRAP(json_get_double_by_path) procedure,private :: MAYBEWRAP(json_get_double_vec_by_path) procedure,private :: MAYBEWRAP(json_get_logical_by_path) procedure,private :: MAYBEWRAP(json_get_logical_vec_by_path) procedure,private :: MAYBEWRAP(json_get_string_by_path) procedure,private :: MAYBEWRAP(json_get_string_vec_by_path) procedure,private :: MAYBEWRAP(json_get_array_by_path) procedure,private :: MAYBEWRAP(json_get_alloc_string_vec_by_path) procedure,private :: json_get_by_path_default procedure,private :: json_get_by_path_rfc6901 procedure,private :: json_get_by_path_jsonpath_bracket procedure,public :: print_to_string => json_value_to_string !! Print the [[json_value]] !! structure to an allocatable !! string !> ! Print the [[json_value]] to a file. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value) :: p ! !... ! call json%print(p,'test.json') !this is [[json_print_to_filename]] !```` generic,public :: print => json_print_to_unit,json_print_to_filename procedure :: json_print_to_unit procedure :: json_print_to_filename !> ! Destructor routine for a [[json_value]] pointer. ! This must be called explicitly if it is no longer needed, ! before it goes out of scope. Otherwise, a memory leak will result. ! !### Example ! ! Destroy the [[json_value]] pointer before the variable goes out of scope: !````fortran ! subroutine example1() ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%create_object(p,'') ! call json%add(p,'year',2015) ! call json%print(p) ! call json%destroy(p) ! end subroutine example1 !```` ! ! Note: it should NOT be called for a [[json_value]] pointer than has already been ! added to another [[json_value]] structure, since doing so may render the ! other structure invalid. Consider the following example: !````fortran ! subroutine example2(p) ! type(json_core) :: json ! type(json_value),pointer,intent(out) :: p ! type(json_value),pointer :: q ! call json%create_object(p,'') ! call json%add(p,'year',2015) ! call json%create_object(q,'q') ! call json%add(q,'val',1) ! call json%add(p, q) !add q to p structure ! ! do NOT call json%destroy(q) here, because q is ! ! now part of the output structure p. p should be destroyed ! ! somewhere upstream by the caller of this routine. ! nullify(q) !OK, but not strictly necessary ! end subroutine example2 !```` generic,public :: destroy => json_value_destroy,destroy_json_core procedure :: json_value_destroy procedure :: destroy_json_core !> ! If the child variable is present, then remove it. generic,public :: remove_if_present => MAYBEWRAP(json_value_remove_if_present) procedure :: MAYBEWRAP(json_value_remove_if_present) !> ! Allocate a [[json_value]] pointer and make it a double variable. ! The pointer should not already be allocated. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%create_double(p,'value',1.0_RK) !```` generic,public :: create_double => MAYBEWRAP(json_value_create_double) procedure :: MAYBEWRAP(json_value_create_double) !> ! Allocate a [[json_value]] pointer and make it an array variable. ! The pointer should not already be allocated. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%create_array(p,'arrayname') !```` generic,public :: create_array => MAYBEWRAP(json_value_create_array) procedure :: MAYBEWRAP(json_value_create_array) !> ! Allocate a [[json_value]] pointer and make it an object variable. ! The pointer should not already be allocated. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%create_object(p,'objectname') !```` ! !@note The name is not significant for the root structure or an array element. ! In those cases, an empty string can be used. generic,public :: create_object => MAYBEWRAP(json_value_create_object) procedure :: MAYBEWRAP(json_value_create_object) !> ! Allocate a json_value pointer and make it a null variable. ! The pointer should not already be allocated. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%create_null(p,'value') !```` generic,public :: create_null => MAYBEWRAP(json_value_create_null) procedure :: MAYBEWRAP(json_value_create_null) !> ! Allocate a json_value pointer and make it a string variable. ! The pointer should not already be allocated. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%create_string(p,'value','foobar') !```` generic,public :: create_string => MAYBEWRAP(json_value_create_string) procedure :: MAYBEWRAP(json_value_create_string) !> ! Allocate a json_value pointer and make it an integer variable. ! The pointer should not already be allocated. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%create_integer(p,42,'value') !```` generic,public :: create_integer => MAYBEWRAP(json_value_create_integer) procedure :: MAYBEWRAP(json_value_create_integer) !> ! Allocate a json_value pointer and make it a logical variable. ! The pointer should not already be allocated. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%create_logical(p,'value',.true.) !```` generic,public :: create_logical => MAYBEWRAP(json_value_create_logical) procedure :: MAYBEWRAP(json_value_create_logical) !> ! Parse the JSON file and populate the [[json_value]] tree. generic,public :: parse => json_parse_file, MAYBEWRAP(json_parse_string) procedure :: json_parse_file procedure :: MAYBEWRAP(json_parse_string) !> ! Throw an exception. generic,public :: throw_exception => MAYBEWRAP(json_throw_exception) procedure :: MAYBEWRAP(json_throw_exception) !> ! Rename a [[json_value]] variable. generic,public :: rename => MAYBEWRAP(json_value_rename),& MAYBEWRAP(json_rename_by_path) procedure :: MAYBEWRAP(json_value_rename) procedure :: MAYBEWRAP(json_rename_by_path) #ifdef USE_UCS4 generic,public :: rename => json_rename_by_path_name_ascii,& json_rename_by_path_path_ascii procedure :: json_rename_by_path_name_ascii procedure :: json_rename_by_path_path_ascii #endif !> ! get info about a [[json_value]] generic,public :: info => json_info, MAYBEWRAP(json_info_by_path) procedure :: json_info procedure :: MAYBEWRAP(json_info_by_path) !> ! get string info about a [[json_value]] generic,public :: string_info => json_string_info procedure :: json_string_info !> ! get matrix info about a [[json_value]] generic,public :: matrix_info => json_matrix_info, MAYBEWRAP(json_matrix_info_by_path) procedure :: json_matrix_info procedure :: MAYBEWRAP(json_matrix_info_by_path) !> ! insert a new element after an existing one, ! updating the JSON structure accordingly generic,public :: insert_after => json_value_insert_after, & json_value_insert_after_child_by_index procedure :: json_value_insert_after procedure :: json_value_insert_after_child_by_index !> ! get the path to a JSON variable in a structure: generic,public :: get_path => MAYBEWRAP(json_get_path) procedure :: MAYBEWRAP(json_get_path) !> ! verify if a path is valid ! (i.e., a variable with this path exists in the file). generic,public :: valid_path => MAYBEWRAP(json_valid_path) procedure :: MAYBEWRAP(json_valid_path) procedure,public :: remove => json_value_remove !! Remove a [[json_value]] from a !! linked-list structure. procedure,public :: replace => json_value_replace !! Replace a [[json_value]] in a !! linked-list structure. procedure,public :: reverse => json_value_reverse !! Reverse the order of the children !! of an array of object. procedure,public :: check_for_errors => json_check_for_errors !! check for error and get error message procedure,public :: clear_exceptions => json_clear_exceptions !! clear exceptions procedure,public :: count => json_count !! count the number of children procedure,public :: clone => json_clone !! clone a JSON structure (deep copy) procedure,public :: failed => json_failed !! check for error procedure,public :: get_parent => json_get_parent !! get pointer to json_value parent procedure,public :: get_next => json_get_next !! get pointer to json_value next procedure,public :: get_previous => json_get_previous !! get pointer to json_value previous procedure,public :: get_tail => json_get_tail !! get pointer to json_value tail procedure,public :: initialize => json_initialize !! to initialize some parsing parameters procedure,public :: traverse => json_traverse !! to traverse all elements of a JSON !! structure procedure,public :: print_error_message => json_print_error_message !! simply routine to print error !! messages procedure,public :: swap => json_value_swap !! Swap two [[json_value]] pointers !! in a structure (or two different !! structures). procedure,public :: is_child_of => json_value_is_child_of !! Check if a [[json_value]] is a !! descendant of another. procedure,public :: validate => json_value_validate !! Check that a [[json_value]] linked !! list is valid (i.e., is properly !! constructed). This may be useful !! if it has been constructed externally. procedure,public :: check_for_duplicate_keys & => json_check_all_for_duplicate_keys !! Check entire JSON structure !! for duplicate keys (recursively) procedure,public :: check_children_for_duplicate_keys & => json_check_children_for_duplicate_keys !! Check a `json_value` object's !! children for duplicate keys !other private routines: procedure :: name_equal procedure :: name_strings_equal procedure :: json_value_print procedure :: string_to_int procedure :: string_to_dble procedure :: parse_value procedure :: parse_number procedure :: parse_string procedure :: parse_for_chars procedure :: parse_object procedure :: parse_array procedure :: annotate_invalid_json procedure :: pop_char procedure :: push_char procedure :: get_current_line_from_file_stream procedure,nopass :: get_current_line_from_file_sequential procedure :: convert procedure :: to_string procedure :: to_logical procedure :: to_integer procedure :: to_double procedure :: to_null procedure :: to_object procedure :: to_array procedure,nopass :: json_value_clone_func end type json_core !********************************************************* !********************************************************* !> ! Structure constructor to initialize a ! [[json_core(type)]] object ! !### Example ! !```fortran ! type(json_file) :: json_core ! json_core = json_core() !``` interface json_core module procedure initialize_json_core end interface !********************************************************* !************************************************************************************* abstract interface subroutine json_array_callback_func(json, element, i, count) !! Array element callback function. Used by [[json_get_array]] import :: json_value,json_core,IK implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: element integer(IK),intent(in) :: i !! index integer(IK),intent(in) :: count !! size of array end subroutine json_array_callback_func subroutine json_traverse_callback_func(json,p,finished) !! Callback function used by [[json_traverse]] import :: json_value,json_core,LK implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p logical(LK),intent(out) :: finished !! set true to stop traversing end subroutine json_traverse_callback_func end interface public :: json_array_callback_func public :: json_traverse_callback_func !************************************************************************************* contains !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 4/17/2016 ! ! Destructor for the [[json_core(type)]] type. subroutine destroy_json_core(me) implicit none class(json_core),intent(out) :: me end subroutine destroy_json_core !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 4/26/2016 ! ! Function constructor for a [[json_core(type)]]. ! This is just a wrapper for [[json_initialize]]. ! !@note [[initialize_json_core]], [[json_initialize]], ! [[initialize_json_core_in_file]], and [[initialize_json_file]] ! all have a similar interface. function initialize_json_core(verbose,compact_reals,& print_signs,real_format,spaces_per_tab,& strict_type_checking,& trailing_spaces_significant,& case_sensitive_keys,& no_whitespace,& unescape_strings,& comment_char,& path_mode,& path_separator,& compress_vectors,& allow_duplicate_keys,& escape_solidus,& stop_on_error) result(json_core_object) implicit none type(json_core) :: json_core_object #include "json_initialize_arguments.inc" call json_core_object%initialize(verbose,compact_reals,& print_signs,real_format,spaces_per_tab,& strict_type_checking,& trailing_spaces_significant,& case_sensitive_keys,& no_whitespace,& unescape_strings,& comment_char,& path_mode,& path_separator,& compress_vectors,& allow_duplicate_keys,& escape_solidus,& stop_on_error) end function initialize_json_core !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/4/2013 ! ! Initialize the [[json_core(type)]] instance. ! ! The routine may be called before any of the [[json_core(type)]] methods are used in ! order to specify certain parameters. If it is not called, then the defaults ! are used. This routine is also called internally by various routines. ! It can also be called to clear exceptions, or to reset some ! of the variables (note that only the arguments present are changed). ! !### Modified ! * Izaak Beekman : 02/24/2015 ! !@note [[initialize_json_core]], [[json_initialize]], ! [[initialize_json_core_in_file]], and [[initialize_json_file]] ! all have a similar interface. subroutine json_initialize(me,verbose,compact_reals,& print_signs,real_format,spaces_per_tab,& strict_type_checking,& trailing_spaces_significant,& case_sensitive_keys,& no_whitespace,& unescape_strings,& comment_char,& path_mode,& path_separator,& compress_vectors,& allow_duplicate_keys,& escape_solidus,& stop_on_error) implicit none class(json_core),intent(inout) :: me #include "json_initialize_arguments.inc" character(kind=CDK,len=10) :: w !! max string length character(kind=CDK,len=10) :: d !! real precision digits character(kind=CDK,len=10) :: e !! real exponent digits character(kind=CDK,len=2) :: sgn !! sign flag: `ss` or `sp` character(kind=CDK,len=2) :: rl_edit_desc !! `G`, `E`, `EN`, or `ES` integer(IK) :: istat !! `iostat` flag for !! write statements logical(LK) :: sgn_prnt !! print sign flag !reset exception to false: call me%clear_exceptions() !Just in case, clear these global variables also: me%pushed_index = 0 me%pushed_char = CK_'' me%char_count = 0 me%line_count = 1 me%ipos = 1 #ifdef USE_UCS4 ! reopen stdout and stderr with utf-8 encoding open(output_unit,encoding='utf-8') open(error_unit, encoding='utf-8') #endif !various optional inputs: if (present(spaces_per_tab)) & me%spaces_per_tab = spaces_per_tab if (present(stop_on_error)) & me%stop_on_error = stop_on_error if (present(verbose)) & me%is_verbose = verbose if (present(strict_type_checking)) & me%strict_type_checking = strict_type_checking if (present(trailing_spaces_significant)) & me%trailing_spaces_significant = trailing_spaces_significant if (present(case_sensitive_keys)) & me%case_sensitive_keys = case_sensitive_keys if (present(no_whitespace)) & me%no_whitespace = no_whitespace if (present(unescape_strings)) & me%unescaped_strings = unescape_strings if (present(path_mode)) then if (path_mode==1_IK .or. path_mode==2_IK .or. path_mode==3_IK) then me%path_mode = path_mode else me%path_mode = 1_IK ! just to have a valid value call me%throw_exception('Invalid path_mode.') end if end if ! if we are allowing comments in the file: ! [an empty string disables comments] if (present(comment_char)) then me%allow_comments = comment_char/=CK_'' me%comment_char = comment_char end if ! path separator: if (present(path_separator)) then me%path_separator = path_separator end if ! printing vectors in compressed form: if (present(compress_vectors)) then me%compress_vectors = compress_vectors end if ! checking for duplicate keys: if (present(allow_duplicate_keys)) then me%allow_duplicate_keys = allow_duplicate_keys end if ! if escaping the forward slash: if (present(escape_solidus)) then me%escape_solidus = escape_solidus end if !Set the format for real numbers: ! [if not changing it, then it remains the same] if ( (.not. allocated(me%real_fmt)) .or. & ! if this hasn't been done yet present(compact_reals) .or. & present(print_signs) .or. & present(real_format) ) then !allow the special case where real format is '*': ! [this overrides the other options] if (present(real_format)) then if (real_format==star) then if (present(compact_reals)) then ! we will also allow for compact reals with ! '*' format, if both arguments are present. me%compact_real = compact_reals else me%compact_real = .false. end if me%real_fmt = star return end if end if if (present(compact_reals)) me%compact_real = compact_reals !set defaults sgn_prnt = .false. if ( present( print_signs) ) sgn_prnt = print_signs if ( sgn_prnt ) then sgn = 'sp' else sgn = 'ss' end if rl_edit_desc = 'E' if ( present( real_format ) ) then select case ( real_format ) case ('g','G','e','E','en','EN','es','ES') rl_edit_desc = real_format case default call me%throw_exception('Invalid real format, "' // & trim(real_format) // '", passed to json_initialize.'// & new_line('a') // 'Acceptable formats are: "G", "E", "EN", and "ES".' ) end select end if ! set the default output/input format for reals: write(w,'(ss,I0)',iostat=istat) max_numeric_str_len if (istat==0) write(d,'(ss,I0)',iostat=istat) real_precision if (istat==0) write(e,'(ss,I0)',iostat=istat) real_exponent_digits if (istat==0) then me%real_fmt = '(' // sgn // ',' // trim(rl_edit_desc) //& trim(w) // '.' // trim(d) // 'E' // trim(e) // ')' else me%real_fmt = '(' // sgn // ',' // trim(rl_edit_desc) // & '27.17E4)' !just use this one (should never happen) end if end if end subroutine json_initialize !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Returns true if `name` is equal to `p%name`, using the specified ! settings for case sensitivity and trailing whitespace. ! !### History ! * 4/30/2016 : original version ! * 8/25/2017 : now just a wrapper for [[name_strings_equal]] function name_equal(json,p,name) result(is_equal) implicit none class(json_core),intent(inout) :: json type(json_value),intent(in) :: p !! the json object character(kind=CK,len=*),intent(in) :: name !! the name to check for logical(LK) :: is_equal !! true if the string are !! lexically equal if (allocated(p%name)) then ! call the low-level routines for the name strings: is_equal = json%name_strings_equal(p%name,name) else is_equal = name == CK_'' ! check a blank name end if end function name_equal !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 8/25/2017 ! ! Returns true if the name strings `name1` is equal to `name2`, using ! the specified settings for case sensitivity and trailing whitespace. function name_strings_equal(json,name1,name2) result(is_equal) implicit none class(json_core),intent(inout) :: json character(kind=CK,len=*),intent(in) :: name1 !! the name to check character(kind=CK,len=*),intent(in) :: name2 !! the name to check logical(LK) :: is_equal !! true if the string are !! lexically equal !must be the same length if we are treating !trailing spaces as significant, so do a !quick test of this first: if (json%trailing_spaces_significant) then is_equal = len(name1) == len(name2) if (.not. is_equal) return end if if (json%case_sensitive_keys) then is_equal = name1 == name2 else is_equal = lowercase_string(name1) == lowercase_string(name2) end if end function name_strings_equal !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 10/31/2015 ! ! Create a deep copy of a [[json_value]] linked-list structure. ! !### Notes ! ! * If `from` has children, then they are also cloned. ! * The parent of `from` is not linked to `to`. ! * If `from` is an element of an array, then the previous and ! next entries are not cloned (only that element and it's children, if any). ! !### Example ! !````fortran ! program test ! use json_module ! implicit none ! type(json_core) :: json ! type(json_value),pointer :: j1, j2 ! call json%parse('../files/inputs/test1.json',j1) ! call json%clone(j1,j2) !now have two independent copies ! call json%destroy(j1) !destroys j1, but j2 remains ! call json%print(j2,'j2.json') ! call json%destroy(j2) ! end program test !```` subroutine json_clone(json,from,to) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: from !! this is the structure to clone type(json_value),pointer :: to !! the clone is put here !! (it must not already be associated) !call the main function: call json%json_value_clone_func(from,to) end subroutine json_clone !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 10/31/2015 ! ! Recursive deep copy function called by [[json_clone]]. ! !@note If new data is added to the [[json_value]] type, ! then this would need to be updated. recursive subroutine json_value_clone_func(from,to,parent,previous,next,children,tail) implicit none type(json_value),pointer :: from !! this is the structure to clone type(json_value),pointer :: to !! the clone is put here (it !! must not already be associated) type(json_value),pointer,optional :: parent !! to%parent type(json_value),pointer,optional :: previous !! to%previous type(json_value),pointer,optional :: next !! to%next type(json_value),pointer,optional :: children !! to%children logical,optional :: tail !! if "to" is the tail of !! its parent's children nullify(to) if (associated(from)) then allocate(to) !copy over the data variables: ! [note: the allocate() statements don't work here for the ! deferred-length characters in gfortran-4.9] if (allocated(from%name)) to%name = from%name if (allocated(from%dbl_value)) allocate(to%dbl_value,source=from%dbl_value) if (allocated(from%log_value)) allocate(to%log_value,source=from%log_value) if (allocated(from%str_value)) to%str_value = from%str_value if (allocated(from%int_value)) allocate(to%int_value,source=from%int_value) to%var_type = from%var_type to%n_children = from%n_children !allocate and associate the pointers as necessary: if (present(parent)) to%parent => parent if (present(previous)) to%previous => previous if (present(next)) to%next => next if (present(children)) to%children => children if (present(tail)) then if (tail .and. associated(to%parent)) to%parent%tail => to end if if (associated(from%next) .and. associated(to%parent)) then ! we only clone the next entry in an array ! if the parent has also been cloned allocate(to%next) call json_value_clone_func(from%next,& to%next,& previous=to,& parent=to%parent,& tail=(.not. associated(from%next%next))) end if if (associated(from%children)) then allocate(to%children) call json_value_clone_func(from%children,& to%children,& parent=to,& tail=(.not. associated(from%children%next))) end if end if end subroutine json_value_clone_func !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Destroy the data within a [[json_value]], and reset type to `json_unknown`. subroutine destroy_json_data(d) implicit none type(json_value),intent(inout) :: d d%var_type = json_unknown if (allocated(d%log_value)) deallocate(d%log_value) if (allocated(d%int_value)) deallocate(d%int_value) if (allocated(d%dbl_value)) deallocate(d%dbl_value) if (allocated(d%str_value)) deallocate(d%str_value) end subroutine destroy_json_data !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 2/13/2014 ! ! Returns information about a [[json_value]]. subroutine json_info(json,p,var_type,n_children,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p integer(IK),intent(out),optional :: var_type !! variable type integer(IK),intent(out),optional :: n_children !! number of children character(kind=CK,len=:),allocatable,intent(out),optional :: name !! variable name if (present(var_type)) var_type = p%var_type if (present(n_children)) n_children = json%count(p) if (present(name)) then if (allocated(p%name)) then name = p%name else name = CK_'' end if end if end subroutine json_info !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/18/2016 ! ! Returns information about character strings returned from a [[json_value]]. subroutine json_string_info(json,p,ilen,max_str_len,found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p integer(IK),dimension(:),allocatable,intent(out),optional :: ilen !! if `p` is an array, this !! is the actual length !! of each character !! string in the array. !! if not an array, this !! is returned unallocated. integer(IK),intent(out),optional :: max_str_len !! The maximum length required to !! hold the string representation returned !! by a call to a `get` routine. If a scalar, !! this is just the length of the scalar. If !! a vector, this is the maximum length of !! any element. logical(LK),intent(out),optional :: found !! true if there were no errors. !! if not present, an error will !! throw an exception character(kind=CK,len=:),allocatable :: cval !! for getting values as strings. logical(LK) :: initialized !! if the output array has been sized logical(LK) :: get_max_len !! if we are returning the `max_str_len` logical(LK) :: get_ilen !! if we are returning the `ilen` array integer(IK) :: var_type !! variable type get_max_len = present(max_str_len) get_ilen = present(ilen) if (.not. json%exception_thrown) then if (present(found)) found = .true. initialized = .false. if (get_max_len) max_str_len = 0 select case (p%var_type) case (json_array) ! it's an array ! call routine for each element call json%get(p, array_callback=get_string_lengths) case default ! not an array if (json%strict_type_checking) then ! only allowing strings to be returned ! as strings, so we can check size directly call json%info(p,var_type=var_type) if (var_type==json_string) then if (allocated(p%str_value) .and. get_max_len) & max_str_len = len(p%str_value) else ! it isn't a string, so there is no length call json%throw_exception('Error in json_string_info: '//& 'When strict_type_checking is true '//& 'the variable must be a character string.') end if else ! in this case, we have to get the value ! as a string to know what size it is. call json%get(p, value=cval) if (.not. json%exception_thrown) then if (allocated(cval) .and. get_max_len) & max_str_len = len(cval) end if end if end select end if if (json%exception_thrown) then if (present(found)) then call json%clear_exceptions() found = .false. end if if (get_max_len) max_str_len = 0 if (get_ilen) then if (allocated(ilen)) deallocate(ilen) end if end if contains subroutine get_string_lengths(json, element, i, count) !! callback function to call for each element in the array. implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: element integer(IK),intent(in) :: i !! index integer(IK),intent(in) :: count !! size of array character(kind=CK,len=:),allocatable :: cval integer(IK) :: var_type if (json%exception_thrown) return if (.not. initialized) then if (get_ilen) allocate(ilen(count)) initialized = .true. end if if (json%strict_type_checking) then ! only allowing strings to be returned ! as strings, so we can check size directly call json%info(element,var_type=var_type) if (var_type==json_string) then if (allocated(element%str_value)) then if (get_max_len) then if (len(element%str_value)>max_str_len) & max_str_len = len(element%str_value) end if if (get_ilen) ilen(i) = len(element%str_value) else if (get_ilen) ilen(i) = 0 end if else ! it isn't a string, so there is no length call json%throw_exception('Error in json_string_info: '//& 'When strict_type_checking is true '//& 'the array must contain only '//& 'character strings.') end if else ! in this case, we have to get the value ! as a string to know what size it is. call json%get(element, value=cval) if (json%exception_thrown) return if (allocated(cval)) then if (get_max_len) then if (len(cval)>max_str_len) max_str_len = len(cval) end if if (get_ilen) ilen(i) = len(cval) else if (get_ilen) ilen(i) = 0 end if end if end subroutine get_string_lengths end subroutine json_string_info !***************************************************************************************** !***************************************************************************************** ! ! Returns information about a [[json_value]], given the path. ! !### See also ! * [[json_info]] ! !@note If `found` is present, no exceptions will be thrown if an ! error occurs. Otherwise, an exception will be thrown if the ! variable is not found. subroutine json_info_by_path(json,p,path,found,var_type,n_children,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! a JSON linked list character(kind=CK,len=*),intent(in) :: path !! path to the variable logical(LK),intent(out),optional :: found !! true if it was found integer(IK),intent(out),optional :: var_type !! variable type integer(IK),intent(out),optional :: n_children !! number of children character(kind=CK,len=:),allocatable,intent(out),optional :: name !! variable name type(json_value),pointer :: p_var !! temporary pointer logical(LK) :: ok !! if the variable was found #if defined __GFORTRAN__ character(kind=CK,len=:),allocatable :: p_name !! temporary variable for getting name #endif call json%get(p,path,p_var,found) !check if it was found: if (present(found)) then ok = found else ok = .not. json%exception_thrown end if if (.not. ok) then if (present(var_type)) var_type = json_unknown if (present(n_children)) n_children = 0 if (present(name)) name = CK_'' else !get info: #if defined __GFORTRAN__ call json%info(p_var,var_type,n_children) if (present(name)) then !workaround for gfortran bug if (allocated(p_var%name)) then p_name = p_var%name name = p_name else name = CK_'' end if end if #else call json%info(p_var,var_type,n_children,name) #endif end if end subroutine json_info_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_info_by_path]] where "path" is kind=CDK. subroutine wrap_json_info_by_path(json,p,path,found,var_type,n_children,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! a JSON linked list character(kind=CDK,len=*),intent(in) :: path !! path to the variable logical(LK),intent(out),optional :: found !! true if it was found integer(IK),intent(out),optional :: var_type !! variable type integer(IK),intent(out),optional :: n_children !! number of children character(kind=CK,len=:),allocatable,intent(out),optional :: name !! variable name call json%info(p,to_unicode(path),found,var_type,n_children,name) end subroutine wrap_json_info_by_path !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 10/16/2015 ! ! Alternate version of [[json_info]] that returns matrix ! information about a [[json_value]]. ! ! A [[json_value]] is a valid rank 2 matrix if all of the following are true: ! ! * The var_type is *json_array* ! * Each child is also a *json_array*, each of which has the same number of elements ! * Each individual element has the same variable type (integer, logical, etc.) ! ! The idea here is that if it is a valid matrix, it can be interoperable with ! a Fortran rank 2 array of the same type. ! !### Example ! ! The following example is an array with `var_type=json_integer`, ! `n_sets=3`, and `set_size=4` ! !```json ! { ! "matrix": [ ! [1,2,3,4], ! [5,6,7,8], ! [9,10,11,12] ! ] ! } !``` subroutine json_matrix_info(json,p,is_matrix,var_type,n_sets,set_size,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! a JSON linked list logical(LK),intent(out) :: is_matrix !! true if it is a valid matrix integer(IK),intent(out),optional :: var_type !! variable type of data in the matrix !! (if all elements have the same type) integer(IK),intent(out),optional :: n_sets !! number of data sets (i.e., matrix !! rows if using row-major order) integer(IK),intent(out),optional :: set_size !! size of each data set (i.e., matrix !! cols if using row-major order) character(kind=CK,len=:),allocatable,intent(out),optional :: name !! variable name type(json_value),pointer :: p_row !! for getting a set type(json_value),pointer :: p_element !! for getting an element in a set integer(IK) :: vartype !! json variable type of `p` integer(IK) :: row_vartype !! json variable type of a row integer(IK) :: element_vartype !! json variable type of an element in a row integer(IK) :: nr !! number of children of `p` integer(IK) :: nc !! number of elements in first child of `p` integer(IK) :: icount !! number of elements in a set integer :: i !! counter integer :: j !! counter #if defined __GFORTRAN__ character(kind=CK,len=:),allocatable :: p_name !! temporary variable for getting name #endif !get info about the variable: #if defined __GFORTRAN__ call json%info(p,vartype,nr) if (present(name)) then !workaround for gfortran bug if (allocated(p%name)) then p_name = p%name name = p_name else name = CK_'' end if end if #else call json%info(p,vartype,nr,name) #endif is_matrix = (vartype==json_array) if (is_matrix) then main : do i=1,nr nullify(p_row) call json%get_child(p,i,p_row) if (.not. associated(p_row)) then is_matrix = .false. call json%throw_exception('Error in json_matrix_info: '//& 'Malformed JSON linked list') exit main end if call json%info(p_row,var_type=row_vartype,n_children=icount) if (row_vartype==json_array) then if (i==1) nc = icount !number of columns in first row if (icount==nc) then !make sure each row has the same number of columns !see if all the variables in this row are the same type: do j=1,icount nullify(p_element) call json%get_child(p_row,j,p_element) if (.not. associated(p_element)) then is_matrix = .false. call json%throw_exception('Error in json_matrix_info: '//& 'Malformed JSON linked list') exit main end if call json%info(p_element,var_type=element_vartype) if (i==1 .and. j==1) vartype = element_vartype !type of first element !in the row if (vartype/=element_vartype) then !not all variables are the same time is_matrix = .false. exit main end if end do else is_matrix = .false. exit main end if else is_matrix = .false. exit main end if end do main end if if (is_matrix) then if (present(var_type)) var_type = vartype if (present(n_sets)) n_sets = nr if (present(set_size)) set_size = nc else if (present(var_type)) var_type = json_unknown if (present(n_sets)) n_sets = 0 if (present(set_size)) set_size = 0 end if end subroutine json_matrix_info !***************************************************************************************** !***************************************************************************************** !> ! Returns matrix information about a [[json_value]], given the path. ! !### See also ! * [[json_matrix_info]] ! !@note If `found` is present, no exceptions will be thrown if an ! error occurs. Otherwise, an exception will be thrown if the ! variable is not found. subroutine json_matrix_info_by_path(json,p,path,is_matrix,found,& var_type,n_sets,set_size,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! a JSON linked list character(kind=CK,len=*),intent(in) :: path !! path to the variable logical(LK),intent(out) :: is_matrix !! true if it is a valid matrix logical(LK),intent(out),optional :: found !! true if it was found integer(IK),intent(out),optional :: var_type !! variable type of data in !! the matrix (if all elements have !! the same type) integer(IK),intent(out),optional :: n_sets !! number of data sets (i.e., matrix !! rows if using row-major order) integer(IK),intent(out),optional :: set_size !! size of each data set (i.e., matrix !! cols if using row-major order) character(kind=CK,len=:),allocatable,intent(out),optional :: name !! variable name type(json_value),pointer :: p_var logical(LK) :: ok #if defined __GFORTRAN__ character(kind=CK,len=:),allocatable :: p_name !! temporary variable for getting name #endif call json%get(p,path,p_var,found) !check if it was found: if (present(found)) then ok = found else ok = .not. json%exception_thrown end if if (.not. ok) then if (present(var_type)) var_type = json_unknown if (present(n_sets)) n_sets = 0 if (present(set_size)) set_size = 0 if (present(name)) name = CK_'' else !get info about the variable: #if defined __GFORTRAN__ call json%matrix_info(p_var,is_matrix,var_type,n_sets,set_size) if (present(name)) then !workaround for gfortran bug if (allocated(p_var%name)) then p_name = p_var%name name = p_name else name = CK_'' end if end if #else call json%matrix_info(p_var,is_matrix,var_type,n_sets,set_size,name) #endif if (json%exception_thrown .and. present(found)) then found = .false. call json%clear_exceptions() end if end if end subroutine json_matrix_info_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_matrix_info_by_path]] where "path" is kind=CDK. subroutine wrap_json_matrix_info_by_path(json,p,path,is_matrix,found,& var_type,n_sets,set_size,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! a JSON linked list character(kind=CDK,len=*),intent(in) :: path !! path to the variable logical(LK),intent(out) :: is_matrix !! true if it is a valid matrix logical(LK),intent(out),optional :: found !! true if it was found integer(IK),intent(out),optional :: var_type !! variable type of data in !! the matrix (if all elements have !! the same type) integer(IK),intent(out),optional :: n_sets !! number of data sets (i.e., matrix !! rows if using row-major order) integer(IK),intent(out),optional :: set_size !! size of each data set (i.e., matrix !! cols if using row-major order) character(kind=CK,len=:),allocatable,intent(out),optional :: name !! variable name call json%matrix_info(p,to_unicode(path),is_matrix,found,var_type,n_sets,set_size,name) end subroutine wrap_json_matrix_info_by_path !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 4/29/2016 ! ! Rename a [[json_value]]. subroutine json_value_rename(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p character(kind=CK,len=*),intent(in) :: name !! new variable name if (json%trailing_spaces_significant) then p%name = name else p%name = trim(name) end if end subroutine json_value_rename !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 4/29/2016 ! ! Alternate version of [[json_value_rename]], where `name` is kind=CDK. subroutine wrap_json_value_rename(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p character(kind=CDK,len=*),intent(in) :: name !! new variable name call json%rename(p,to_unicode(name)) end subroutine wrap_json_value_rename !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/4/2013 ! ! Clear exceptions in the [[json_core(type)]]. pure subroutine json_clear_exceptions(json) implicit none class(json_core),intent(inout) :: json !clear the flag and message: json%exception_thrown = .false. if (allocated(json%err_message)) deallocate(json%err_message) end subroutine json_clear_exceptions !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/4/2013 ! ! Throw an exception in the [[json_core(type)]]. ! This routine sets the error flag, and prevents any subsequent routine ! from doing anything, until [[json_clear_exceptions]] is called. ! !@note If `is_verbose` is true, this will also print a ! traceback if the Intel compiler is used. ! !@note If `stop_on_error` is true, then the program is stopped. subroutine json_throw_exception(json,msg) #ifdef __INTEL_COMPILER use ifcore, only: tracebackqq #endif implicit none class(json_core),intent(inout) :: json character(kind=CK,len=*),intent(in) :: msg !! the error message json%exception_thrown = .true. json%err_message = trim(msg) if (json%stop_on_error) then #ifdef __INTEL_COMPILER ! for Intel, we raise a traceback and quit call tracebackqq(string=trim(msg), user_exit_code=0) #else write(error_unit,'(A)') 'JSON-Fortran Exception: '//trim(msg) error stop 1 #endif elseif (json%is_verbose) then write(output_unit,'(A)') '***********************' write(output_unit,'(A)') 'JSON-Fortran Exception: '//trim(msg) !#if defined __GFORTRAN__ ! call backtrace() ! (have to compile with -fbacktrace -fall-intrinsics flags) !#endif #ifdef __INTEL_COMPILER call tracebackqq(user_exit_code=-1) ! print a traceback and return #endif write(output_unit,'(A)') '***********************' end if end subroutine json_throw_exception !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_throw_exception]], where `msg` is kind=CDK. subroutine wrap_json_throw_exception(json,msg) implicit none class(json_core),intent(inout) :: json character(kind=CDK,len=*),intent(in) :: msg !! the error message call json%throw_exception(to_unicode(msg)) end subroutine wrap_json_throw_exception !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/4/2013 ! ! Retrieve error code from the [[json_core(type)]]. ! This should be called after `parse` to check for errors. ! If an error is thrown, before using the class again, [[json_initialize]] ! should be called to clean up before it is used again. ! !### Example ! !````fortran ! type(json_file) :: json ! logical :: status_ok ! character(kind=CK,len=:),allocatable :: error_msg ! call json%load_file(filename='myfile.json') ! call json%check_for_errors(status_ok, error_msg) ! if (.not. status_ok) then ! write(*,*) 'Error: '//error_msg ! call json%clear_exceptions() ! call json%destroy() ! end if !```` ! !### See also ! * [[json_failed]] ! * [[json_throw_exception]] subroutine json_check_for_errors(json,status_ok,error_msg) implicit none class(json_core),intent(in) :: json logical(LK),intent(out),optional :: status_ok !! true if there were no errors character(kind=CK,len=:),allocatable,intent(out),optional :: error_msg !! the error message. !! (not allocated if !! there were no errors) #if defined __GFORTRAN__ character(kind=CK,len=:),allocatable :: tmp !! workaround for gfortran bugs #endif if (present(status_ok)) status_ok = .not. json%exception_thrown if (present(error_msg)) then if (json%exception_thrown) then ! if an exception has been thrown, ! then this will always be allocated ! [see json_throw_exception] #if defined __GFORTRAN__ tmp = json%err_message error_msg = tmp #else error_msg = json%err_message #endif end if end if end subroutine json_check_for_errors !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/5/2013 ! ! Logical function to indicate if an exception has been thrown in a [[json_core(type)]]. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: p ! logical :: status_ok ! character(len=:),allocatable :: error_msg ! call json%parse(filename='myfile.json',p) ! if (json%failed()) then ! call json%check_for_errors(status_ok, error_msg) ! write(*,*) 'Error: '//error_msg ! call json%clear_exceptions() ! call json%destroy(p) ! end if !```` ! ! Note that [[json_file]] contains a wrapper for this routine, which is used like: !````fortran ! type(json_file) :: f ! logical :: status_ok ! character(len=:),allocatable :: error_msg ! call f%load_file(filename='myfile.json') ! if (f%failed()) then ! call f%check_for_errors(status_ok, error_msg) ! write(*,*) 'Error: '//error_msg ! call f%clear_exceptions() ! call f%destroy() ! end if !```` ! !### See also ! * [[json_check_for_errors]] pure function json_failed(json) result(failed) implicit none class(json_core),intent(in) :: json logical(LK) :: failed !! will be true if an exception !! has been thrown. failed = json%exception_thrown end function json_failed !***************************************************************************************** !***************************************************************************************** !> ! Allocate a [[json_value]] pointer variable. ! This should be called before adding data to it. ! !### Example ! !````fortran ! type(json_value),pointer :: var ! call json_value_create(var) ! call json%to_double(var,1.0_RK) !```` ! !### Notes ! 1. This routine does not check for exceptions. ! 2. The pointer should not already be allocated, or a memory leak will occur. subroutine json_value_create(p) implicit none type(json_value),pointer :: p nullify(p) allocate(p) end subroutine json_value_create !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/22/2014 ! ! Destroy a [[json_value]] linked-list structure. ! !@note The original FSON version of this ! routine was not properly freeing the memory. ! It was rewritten. ! !@note This routine destroys this variable, it's children, and ! (if `destroy_next` is true) the subsequent elements in ! an object or array. It does not destroy the parent or ! previous elements. ! !@Note There is some protection here to enable destruction of ! improperly-created linked lists. However, likely there ! are cases not handled. Use the [[json_value_validate]] ! method to validate a JSON structure that was manually ! created using [[json_value]] pointers. recursive subroutine json_value_destroy(json,p,destroy_next) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! variable to destroy logical(LK),intent(in),optional :: destroy_next !! if true, then `p%next` !! is also destroyed (default is true) logical(LK) :: des_next !! local copy of `destroy_next` !! optional argument type(json_value),pointer :: child !! for getting child elements logical :: circular !! to check to malformed linked lists if (associated(p)) then if (present(destroy_next)) then des_next = destroy_next else des_next = .true. end if if (allocated(p%name)) deallocate(p%name) call destroy_json_data(p) if (associated(p%next)) then ! check for circular references: if (associated(p, p%next)) nullify(p%next) end if if (associated(p%children)) then do while (p%n_children > 0) child => p%children if (associated(child)) then p%children => p%children%next p%n_children = p%n_children - 1 ! check children for circular references: circular = (associated(p%children) .and. & associated(p%children,child)) call json%destroy(child,destroy_next=.false.) if (circular) exit else ! it is a malformed JSON object. But, we will ! press ahead with the destroy process, since ! otherwise, there would be no way to destroy it. exit end if end do nullify(p%children) nullify(child) end if if (associated(p%next) .and. des_next) call json%destroy(p%next) nullify(p%previous) nullify(p%parent) nullify(p%tail) if (associated(p)) deallocate(p) nullify(p) end if end subroutine json_value_destroy !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 9/9/2014 ! ! Remove a [[json_value]] (and all its children) ! from a linked-list structure, preserving the rest of the structure. ! !### Examples ! ! To extract an object from one JSON structure, and add it to another: !````fortran ! type(json_core) :: json ! type(json_value),pointer :: json1,json2,p ! logical :: found ! !create and populate json1 and json2 ! call json%get(json1,'name',p,found) ! get pointer to name element of json1 ! call json%remove(p,destroy=.false.) ! remove it from json1 (don't destroy) ! call json%add(json2,p) ! add it to json2 !```` ! ! To remove an object from a JSON structure (and destroy it): !````fortran ! type(json_core) :: json ! type(json_value),pointer :: json1,p ! logical :: found ! !create and populate json1 ! call json%get(json1,'name',p,found) ! get pointer to name element of json1 ! call json%remove(p) ! remove and destroy it !```` ! !### History ! * Jacob Williams : 12/28/2014 : added destroy optional argument. subroutine json_value_remove(json,p,destroy) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p logical(LK),intent(in),optional :: destroy !! Option to destroy `p` after it is removed: !! !! * If `destroy` is not present, it is also destroyed. !! * If `destroy` is present and true, it is destroyed. !! * If `destroy` is present and false, it is not destroyed. type(json_value),pointer :: parent !! pointer to parent type(json_value),pointer :: previous !! pointer to previous type(json_value),pointer :: next !! pointer to next logical(LK) :: destroy_it !! if `p` should be destroyed if (associated(p)) then !optional input argument: if (present(destroy)) then destroy_it = destroy else destroy_it = .true. end if if (associated(p%parent)) then parent => p%parent if (associated(p%next)) then !there are later items in the list: next => p%next nullify(p%next) if (associated(p%previous)) then !there are earlier items in the list previous => p%previous previous%next => next next%previous => previous else !this is the first item in the list parent%children => next nullify(next%previous) end if else if (associated(p%previous)) then !there are earlier items in the list: previous => p%previous nullify(previous%next) parent%tail => previous else !this is the only item in the list: nullify(parent%children) nullify(parent%tail) end if end if parent%n_children = parent%n_children - 1 end if if (destroy_it) call json%destroy(p) end if end subroutine json_value_remove !***************************************************************************************** !***************************************************************************************** !> ! Replace `p1` with `p2` in a JSON structure. ! !@note The replacement is done using an insert and remove ! See [[json_value_insert_after]] and [[json_value_remove]] ! for details. subroutine json_value_replace(json,p1,p2,destroy) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p1 !! the item to replace type(json_value),pointer :: p2 !! item to take the place of `p1` logical(LK),intent(in),optional :: destroy !! Should `p1` also be destroyed !! (default is True). Normally, !! this should be true to avoid !! a memory leak. logical(LK) :: destroy_p1 !! if `p1` is to be destroyed if (present(destroy)) then destroy_p1 = destroy else destroy_p1 = .true. ! default end if call json%insert_after(p1,p2) call json%remove(p1,destroy_p1) end subroutine json_value_replace !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 4/11/2017 ! ! Reverse the order of the children of an array or object. subroutine json_value_reverse(json,p) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p type(json_value),pointer :: tmp !! temp variable for traversing the list type(json_value),pointer :: current !! temp variable for traversing the list integer(IK) :: var_type !! for getting the variable type if (associated(p)) then call json%info(p,var_type=var_type) ! can only reverse objects or arrays if (var_type==json_object .or. var_type==json_array) then nullify(tmp) current => p%children p%tail => current ! Swap next and previous for all nodes: do if (.not. associated(current)) exit tmp => current%previous current%previous => current%next current%next => tmp current => current%previous end do if (associated(tmp)) then p%children => tmp%previous end if end if end if end subroutine json_value_reverse !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 4/26/2016 ! ! Swap two elements in a JSON structure. ! All of the children are carried along as well. ! !@note If both are not associated, then an error is thrown. ! !@note The assumption here is that both variables are part of a valid ! [[json_value]] linked list (so the normal `parent`, `previous`, ! `next`, etc. pointers are properly associated if necessary). ! !@warning This cannot be used to swap a parent/child pair, since that ! could lead to a circular linkage. An exception is thrown if ! this is tried. ! !@warning There are also other situations where using this routine may ! produce a malformed JSON structure, such as moving an array ! element outside of an array. This is not checked for. ! !@note If `p1` and `p2` have a common parent, it is always safe to swap them. subroutine json_value_swap(json,p1,p2) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p1 !! swap with `p2` type(json_value),pointer :: p2 !! swap with `p1` logical :: same_parent !! if `p1` and `p2` have the same parent logical :: first_last !! if `p1` and `p2` are the first,last or !! last,first children of a common parent logical :: adjacent !! if `p1` and `p2` are adjacent !! elements in an array type(json_value),pointer :: a !! temporary variable type(json_value),pointer :: b !! temporary variable if (json%exception_thrown) return !both have to be associated: if (associated(p1) .and. associated(p2)) then !simple check to make sure that they both !aren't pointing to the same thing: if (.not. associated(p1,p2)) then !we will not allow swapping an item with one of its descendants: if (json%is_child_of(p1,p2) .or. json%is_child_of(p2,p1)) then call json%throw_exception('Error in json_value_swap: '//& 'cannot swap an item with one of its descendants') else same_parent = ( associated(p1%parent) .and. & associated(p2%parent) .and. & associated(p1%parent,p2%parent) ) if (same_parent) then first_last = (associated(p1%parent%children,p1) .and. & associated(p2%parent%tail,p2)) .or. & (associated(p1%parent%tail,p1) .and. & associated(p2%parent%children,p2)) else first_last = .false. end if !first, we fix children,tail pointers: if (same_parent .and. first_last) then !this is all we have to do for the parent in this case: call swap_pointers(p1%parent%children,p2%parent%tail) else if (same_parent .and. .not. first_last) then if (associated(p1%parent%children,p1)) then p1%parent%children => p2 ! p1 is the first child of the parent else if (associated(p1%parent%children,p2)) then p1%parent%children => p1 ! p2 is the first child of the parent end if if (associated(p1%parent%tail,p1)) then p1%parent%tail => p2 ! p1 is the last child of the parent else if (associated(p1%parent%tail,p2)) then p1%parent%tail => p1 ! p2 is the last child of the parent end if else ! general case: different parents if (associated(p1%parent)) then if (associated(p1%parent%children,p1)) p1%parent%children => p2 if (associated(p1%parent%tail,p1)) p1%parent%tail => p2 end if if (associated(p2%parent)) then if (associated(p2%parent%children,p2)) p2%parent%children => p1 if (associated(p2%parent%tail,p2)) p2%parent%tail => p1 end if call swap_pointers(p1%parent, p2%parent) end if !now, have to fix previous,next pointers: !first, see if they are adjacent: adjacent = associated(p1%next,p2) .or. & associated(p2%next,p1) if (associated(p2%next,p1)) then !p2,p1 a => p2 b => p1 else !p1,p2 (or not adjacent) a => p1 b => p2 end if if (associated(a%previous)) a%previous%next => b if (associated(b%next)) b%next%previous => a if (adjacent) then !a comes before b in the original list b%previous => a%previous a%next => b%next a%previous => b b%next => a else if (associated(a%next)) a%next%previous => b if (associated(b%previous)) b%previous%next => a call swap_pointers(a%previous,b%previous) call swap_pointers(a%next, b%next) end if end if else call json%throw_exception('Error in json_value_swap: '//& 'both pointers must be associated') end if end if contains pure subroutine swap_pointers(s1,s2) implicit none type(json_value),pointer,intent(inout) :: s1 type(json_value),pointer,intent(inout) :: s2 type(json_value),pointer :: tmp !! temporary pointer if (.not. associated(s1,s2)) then tmp => s1 s1 => s2 s2 => tmp end if end subroutine swap_pointers end subroutine json_value_swap !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 4/28/2016 ! ! Returns True if `p2` is a descendant of `p1` ! (i.e, a child, or a child of child, etc.) function json_value_is_child_of(json,p1,p2) result(is_child_of) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p1 type(json_value),pointer :: p2 logical(LK) :: is_child_of is_child_of = .false. if (json%exception_thrown) return if (associated(p1) .and. associated(p2)) then if (associated(p1%children)) then call json%traverse(p1%children,is_child_of_callback) end if end if contains subroutine is_child_of_callback(json,p,finished) !! Traverse until `p` is `p2`. implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p logical(LK),intent(out) :: finished is_child_of = associated(p,p2) finished = is_child_of ! stop searching if found end subroutine is_child_of_callback end function json_value_is_child_of !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 5/2/2016 ! ! Validate a [[json_value]] linked list by checking to make sure ! all the pointers are properly associated, arrays and objects ! have the correct number of children, and the correct data is ! allocated for the variable types. ! ! It recursively traverses the entire structure and checks every element. ! !### History ! * Jacob Williams, 8/26/2017 : added duplicate key check. ! !@note It will return on the first error it encounters. ! !@note This routine does not check or throw any exceptions. ! If `json` is currently in a state of exception, it will ! remain so after calling this routine. subroutine json_value_validate(json,p,is_valid,error_msg) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p logical(LK),intent(out) :: is_valid !! True if the structure is valid. character(kind=CK,len=:),allocatable,intent(out) :: error_msg !! if not valid, this will contain !! a description of the problem logical(LK) :: has_duplicate !! to check for duplicate keys character(kind=CK,len=:),allocatable :: path !! path to duplicate key logical(LK) :: status_ok !! to check for existing exception character(kind=CK,len=:),allocatable :: exception_msg !! error message for an existing exception character(kind=CK,len=:),allocatable :: exception_msg2 !! error message for a new exception if (associated(p)) then is_valid = .true. call check_if_valid(p,require_parent=associated(p%parent)) if (is_valid .and. .not. json%allow_duplicate_keys) then ! if no errors so far, also check the ! entire structure for duplicate keys: ! note: check_for_duplicate_keys does call routines ! that check and throw exceptions, so let's clear any ! first. (save message for later) call json%check_for_errors(status_ok, exception_msg) call json%clear_exceptions() call json%check_for_duplicate_keys(p,has_duplicate,path=path) if (json%failed()) then ! if an exception was thrown during this call, ! then clear it but make that the error message ! returned by this routine. Normally this should ! never actually occur since we have already ! validated the structure. call json%check_for_errors(is_valid, exception_msg2) error_msg = exception_msg2 call json%clear_exceptions() is_valid = .false. else if (has_duplicate) then error_msg = 'duplicate key found: '//path is_valid = .false. end if end if if (.not. status_ok) then ! restore any existing exception if necessary call json%throw_exception(exception_msg) end if ! cleanup: if (allocated(path)) deallocate(path) if (allocated(exception_msg)) deallocate(exception_msg) if (allocated(exception_msg2)) deallocate(exception_msg2) end if else error_msg = 'The pointer is not associated' is_valid = .false. end if contains recursive subroutine check_if_valid(p,require_parent) implicit none type(json_value),pointer,intent(in) :: p logical,intent(in) :: require_parent !! the first one may be a root (so no parent), !! but all descendants must have a parent. integer :: i !! counter type(json_value),pointer :: element type(json_value),pointer :: previous if (is_valid .and. associated(p)) then ! data type: select case (p%var_type) case(json_null,json_object,json_array) if (allocated(p%log_value) .or. allocated(p%int_value) .or. & allocated(p%dbl_value) .or. allocated(p%str_value)) then error_msg = 'incorrect data allocated for '//& 'json_null, json_object, or json_array variable type' is_valid = .false. return end if case(json_logical) if (.not. allocated(p%log_value)) then error_msg = 'log_value should be allocated for json_logical variable type' is_valid = .false. return else if (allocated(p%int_value) .or. & allocated(p%dbl_value) .or. allocated(p%str_value)) then error_msg = 'incorrect data allocated for json_logical variable type' is_valid = .false. return end if case(json_integer) if (.not. allocated(p%int_value)) then error_msg = 'int_value should be allocated for json_integer variable type' is_valid = .false. return else if (allocated(p%log_value) .or. & allocated(p%dbl_value) .or. allocated(p%str_value)) then error_msg = 'incorrect data allocated for json_integer variable type' is_valid = .false. return end if case(json_double) if (.not. allocated(p%dbl_value)) then error_msg = 'dbl_value should be allocated for json_double variable type' is_valid = .false. return else if (allocated(p%log_value) .or. allocated(p%int_value) .or. & allocated(p%str_value)) then error_msg = 'incorrect data allocated for json_double variable type' is_valid = .false. return end if case(json_string) if (.not. allocated(p%str_value)) then error_msg = 'str_value should be allocated for json_string variable type' is_valid = .false. return else if (allocated(p%log_value) .or. allocated(p%int_value) .or. & allocated(p%dbl_value)) then error_msg = 'incorrect data allocated for json_string variable type' is_valid = .false. return end if case default error_msg = 'invalid JSON variable type' is_valid = .false. return end select if (require_parent .and. .not. associated(p%parent)) then error_msg = 'parent pointer is not associated' is_valid = .false. return end if if (.not. allocated(p%name)) then if (associated(p%parent)) then if (p%parent%var_type/=json_array) then error_msg = 'JSON variable must have a name if not an '//& 'array element or the root' is_valid = .false. return end if end if end if if (associated(p%children) .neqv. associated(p%tail)) then error_msg = 'both children and tail pointers must be associated' is_valid = .false. return end if ! now, check next one: if (associated(p%next)) then if (associated(p,p%next)) then error_msg = 'circular linked list' is_valid = .false. return else ! if it's an element in an ! array, then require a parent: call check_if_valid(p%next,require_parent=.true.) end if end if if (associated(p%children)) then if (p%var_type/=json_array .and. p%var_type/=json_object) then error_msg = 'only arrays and objects can have children' is_valid = .false. return end if ! first validate children pointers: previous => null() element => p%children do i = 1, p%n_children if (.not. associated(element%parent,p)) then error_msg = 'child''s parent pointer not properly associated' is_valid = .false. return end if if (i==1 .and. associated(element%previous)) then error_msg = 'first child shouldn''t have a previous' is_valid = .false. return end if if (i<p%n_children .and. .not. associated(element%next)) then error_msg = 'not enough children' is_valid = .false. return end if if (i==p%n_children .and. associated(element%next)) then error_msg = 'too many children' is_valid = .false. return end if if (i>1) then if (.not. associated(previous,element%previous)) then error_msg = 'previous pointer not properly associated' is_valid = .false. return end if end if if (i==p%n_children .and. & .not. associated(element%parent%tail,element)) then error_msg = 'parent''s tail pointer not properly associated' is_valid = .false. return end if if (i<p%n_children) then !setup next case: previous => element element => element%next end if end do !now check all the children: call check_if_valid(p%children,require_parent=.true.) end if end if end subroutine check_if_valid end subroutine json_value_validate !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/6/2014 ! ! Given the path string, remove the variable ! from [[json_value]], if it exists. subroutine json_value_remove_if_present(json,p,path) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: path !! the path to the variable to remove type(json_value),pointer :: p_var logical(LK) :: found call json%get(p,path,p_var,found) if (found) call json%remove(p_var) end subroutine json_value_remove_if_present !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_remove_if_present]], where `path` is kind=CDK. subroutine wrap_json_value_remove_if_present(json,p,path) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: path call json%remove_if_present(p,to_unicode(path)) end subroutine wrap_json_value_remove_if_present !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/6/2014 ! ! Given the path string, if the variable is present, ! and is a scalar, then update its value. ! If it is not present, then create it and set its value. ! !@note If the variable is not a scalar, an exception will be thrown. subroutine json_update_logical(json,p,path,val,found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: path !! path to the variable in the structure logical(LK),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. type(json_value),pointer :: p_var integer(IK) :: var_type call json%get(p,path,p_var,found) if (found) then call json%info(p_var,var_type) select case (var_type) case (json_null,json_logical,json_integer,json_double,json_string) call json%to_logical(p_var,val) !update the value case default found = .false. call json%throw_exception('Error in json_update_logical: '//& 'the variable is not a scalar value') end select else call json%add_by_path(p,path,val) !add the new element end if end subroutine json_update_logical !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_update_logical]], where `path` is kind=CDK. subroutine wrap_json_update_logical(json,p,path,val,found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: path !! path to the variable in the structure logical(LK),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. call json%update(p,to_unicode(path),val,found) end subroutine wrap_json_update_logical !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/6/2014 ! ! Given the path string, if the variable is present, ! and is a scalar, then update its value. ! If it is not present, then create it and set its value. ! !@note If the variable is not a scalar, an exception will be thrown. subroutine json_update_double(json,p,path,val,found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: path !! path to the variable in the structure real(RK),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. type(json_value),pointer :: p_var integer(IK) :: var_type call json%get(p,path,p_var,found) if (found) then call json%info(p_var,var_type) select case (var_type) case (json_null,json_logical,json_integer,json_double,json_string) call json%to_double(p_var,val) !update the value case default found = .false. call json%throw_exception('Error in json_update_double: '//& 'the variable is not a scalar value') end select else call json%add_by_path(p,path,val) !add the new element end if end subroutine json_update_double !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_update_double]], where `path` is kind=CDK. subroutine wrap_json_update_double(json,p,path,val,found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: path !! path to the variable in the structure real(RK),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. call json%update(p,to_unicode(path),val,found) end subroutine wrap_json_update_double !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/6/2014 ! ! Given the path string, if the variable is present, ! and is a scalar, then update its value. ! If it is not present, then create it and set its value. ! !@note If the variable is not a scalar, an exception will be thrown. subroutine json_update_integer(json,p,path,val,found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: path !! path to the variable in the structure integer(IK),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. type(json_value),pointer :: p_var integer(IK) :: var_type call json%get(p,path,p_var,found) if (found) then call json%info(p_var,var_type) select case (var_type) case (json_null,json_logical,json_integer,json_double,json_string) call json%to_integer(p_var,val) !update the value case default found = .false. call json%throw_exception('Error in json_update_integer: '//& 'the variable is not a scalar value') end select else call json%add_by_path(p,path,val) !add the new element end if end subroutine json_update_integer !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_update_integer]], where `path` is kind=CDK. subroutine wrap_json_update_integer(json,p,path,val,found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: path !! path to the variable in the structure integer(IK),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. call json%update(p,to_unicode(path),val,found) end subroutine wrap_json_update_integer !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/6/2014 ! ! Given the path string, if the variable is present, ! and is a scalar, then update its value. ! If it is not present, then create it and set its value. ! !@note If the variable is not a scalar, an exception will be thrown. subroutine json_update_string(json,p,path,val,found,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: path !! path to the variable in the structure character(kind=CK,len=*),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` !! (only used if `val` is present) logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` !! (only used if `val` is present) !! (note that ADJUSTL is done before TRIM) type(json_value),pointer :: p_var integer(IK) :: var_type call json%get(p,path,p_var,found) if (found) then call json%info(p_var,var_type) select case (var_type) case (json_null,json_logical,json_integer,json_double,json_string) call json%to_string(p_var,val,trim_str=trim_str,adjustl_str=adjustl_str) ! update the value case default found = .false. call json%throw_exception('Error in json_update_string: '//& 'the variable is not a scalar value') end select else call json%add_by_path(p,path,val) !add the new element end if end subroutine json_update_string !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_update_string]], where `path` and `value` are kind=CDK. subroutine wrap_json_update_string(json,p,path,val,found,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: path !! path to the variable in the structure character(kind=CDK,len=*),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` !! (only used if `val` is present) logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` !! (only used if `val` is present) !! (note that ADJUSTL is done before TRIM) call json%update(p,to_unicode(path),to_unicode(val),found,trim_str,adjustl_str) end subroutine wrap_json_update_string !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_update_string]], where `path` is kind=CDK. subroutine json_update_string_name_ascii(json,p,path,val,found,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: path !! path to the variable in the structure character(kind=CK, len=*),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` !! (only used if `val` is present) logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` !! (only used if `val` is present) !! (note that ADJUSTL is done before TRIM) call json%update(p,to_unicode(path),val,found,trim_str,adjustl_str) end subroutine json_update_string_name_ascii !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_update_string]], where `val` is kind=CDK. subroutine json_update_string_val_ascii(json,p,path,val,found,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK, len=*),intent(in) :: path !! path to the variable in the structure character(kind=CDK,len=*),intent(in) :: val !! the new value logical(LK),intent(out) :: found !! if the variable was found and was a scalar. logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` !! (only used if `val` is present) logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` !! (only used if `val` is present) !! (note that ADJUSTL is done before TRIM) call json%update(p,path,to_unicode(val),found,trim_str,adjustl_str) end subroutine json_update_string_val_ascii !***************************************************************************************** !***************************************************************************************** !> ! Adds `member` as a child of `p`. subroutine json_value_add_member(json,p,member) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! `p` must be a `json_object` !! or a `json_array` type(json_value),pointer :: member !! the child member !! to add to `p` integer(IK) :: var_type !! variable type of `p` if (.not. json%exception_thrown) then if (associated(p)) then call json%info(p,var_type=var_type) select case (var_type) case(json_object, json_array) ! associate the parent member%parent => p ! add to linked list if (associated(p%children)) then p%tail%next => member member%previous => p%tail else p%children => member member%previous => null() !first in the list end if ! new member is now the last one in the list p%tail => member p%n_children = p%n_children + 1 case default call json%throw_exception('Error in json_value_add_member: '//& 'can only add child to object or array') end select else call json%throw_exception('Error in json_value_add_member: '//& 'the pointer is not associated') end if end if end subroutine json_value_add_member !***************************************************************************************** !***************************************************************************************** !> ! Inserts `element` after `p`, and updates the JSON structure accordingly. ! !### Example ! !````fortran ! program test ! use json_module ! implicit none ! logical(json_LK) :: found ! type(json_core) :: json ! type(json_value),pointer :: p,new,element ! call json%parse(file='myfile.json', p=p) ! call json%get(p,'x(3)',element,found) ! get pointer to an array element in the file ! call json%create_integer(new,1,'') ! create a new element ! call json%insert_after(element,new) ! insert new element after x(3) ! call json%print(p,'myfile2.json') ! write it to a file ! call json%destroy(p) ! cleanup ! end program test !```` ! !### Details ! ! * This routine can be used to insert a new element (or set of elements) ! into an array or object at a specific index. ! See [[json_value_insert_after_child_by_index]] ! * Children and subsequent elements of `element` are carried along. ! * If the inserted elements are part of an existing list, then ! they are removed from that list. ! !```` ! p ! [1] - [2] - [3] - [4] ! | ! [5] - [6] - [7] n=3 elements inserted ! element last ! ! Result is: ! ! [1] - [2] - [5] - [6] - [7] - [3] - [4] ! !```` subroutine json_value_insert_after(json,p,element) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! a value from a JSON structure !! (presumably, this is a child of !! an object or array). type(json_value),pointer :: element !! the element to insert after `p` type(json_value),pointer :: parent !! the parent of `p` type(json_value),pointer :: next !! temp pointer for traversing structure type(json_value),pointer :: last !! the last of the items being inserted integer :: n !! number of items being inserted if (.not. json%exception_thrown) then parent => p%parent ! set first parent of inserted list: element%parent => parent ! Count the number of inserted elements. ! and set their parents. n = 1 ! initialize counter next => element%next last => element do if (.not. associated(next)) exit n = n + 1 next%parent => parent last => next next => next%next end do if (associated(parent)) then ! update parent's child counter: parent%n_children = parent%n_children + n ! if p is last of parents children then ! also have to update parent tail pointer: if (associated(parent%tail,p)) then parent%tail => last end if end if if (associated(element%previous)) then ! element is apparently part of an existing list, ! so have to update that as well. if (associated(element%previous%parent)) then element%previous%parent%n_children = & element%previous%parent%n_children - n element%previous%parent%tail => & element%previous ! now the last one in the list else ! this would be a memory leak if the previous entries ! are not otherwise being pointed too ! [throw an error in this case???] end if !remove element from the other list: element%previous%next => null() end if element%previous => p if (associated(p%next)) then ! if there are any in the list after p: last%next => p%next last%next%previous => element else last%next => null() end if p%next => element end if end subroutine json_value_insert_after !***************************************************************************************** !***************************************************************************************** !> ! Inserts `element` after the `idx`-th child of `p`, ! and updates the JSON structure accordingly. This is just ! a wrapper for [[json_value_insert_after]]. subroutine json_value_insert_after_child_by_index(json,p,idx,element) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! a JSON object or array. integer(IK),intent(in) :: idx !! the index of the child of `p` to !! insert the new element after !! (this is a 1-based Fortran !! style array index) type(json_value),pointer :: element !! the element to insert type(json_value),pointer :: tmp !! for getting the `idx`-th child of `p` if (.not. json%exception_thrown) then ! get the idx-th child of p: call json%get_child(p,idx,tmp) ! call json_value_insert_after: if (.not. json%exception_thrown) call json%insert_after(tmp,element) end if end subroutine json_value_insert_after_child_by_index !***************************************************************************************** !***************************************************************************************** !> ! Add a new member (`json_value` pointer) to a JSON structure, given the path. ! !@warning If the path points to an existing variable in the structure, ! then this routine will destroy it and replace it with the ! new value. subroutine json_add_member_by_path(json,me,path,p,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable type(json_value),pointer,intent(in) :: p !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created type(json_value),pointer :: tmp character(kind=CK,len=:),allocatable :: name !! name of the variable if ( .not. json%exception_thrown ) then if (.not. associated(p)) then call json%throw_exception('Error in json_add_member_by_path:'//& ' Input pointer p is not associated.') if (present(found)) then found = .false. call json%clear_exceptions() end if if ( present(was_created) ) was_created = .false. else ! return a pointer to the path (possibly creating it) call json%create(me,path,tmp,found,was_created) if (.not. associated(tmp)) then call json%throw_exception('Error in json_add_member_by_path:'//& ' Unable to resolve path: '//trim(path)) if (present(found)) then found = .false. call json%clear_exceptions() end if else call json%info(tmp,name=name) ! replace it with the new one: call json%replace(tmp,p,destroy=.true.) call json%rename(p,name) end if end if else if ( present(found) ) found = .false. if ( present(was_created) ) was_created = .false. end if end subroutine json_add_member_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper to [[json_add_member_by_path]] where "path" is kind=CDK. subroutine wrap_json_add_member_by_path(json,me,path,p,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable type(json_value),pointer,intent(in) :: p !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created call json%json_add_member_by_path(me,to_unicode(path),p,found,was_created) end subroutine wrap_json_add_member_by_path !***************************************************************************************** !***************************************************************************************** !> ! Add an integer value to a [[json_value]], given the path. ! !@warning If the path points to an existing variable in the structure, ! then this routine will destroy it and replace it with the ! new value. subroutine json_add_integer_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable integer(IK),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created type(json_value),pointer :: p type(json_value),pointer :: tmp character(kind=CK,len=:),allocatable :: name !! variable name if ( .not. json%exception_thrown ) then nullify(p) ! return a pointer to the path (possibly creating it) ! If the variable had to be created, then ! it will be a json_null variable. call json%create(me,path,p,found,was_created) if (.not. associated(p)) then call json%throw_exception('Error in json_add_integer_by_path:'//& ' Unable to resolve path: '//trim(path)) if (present(found)) then found = .false. call json%clear_exceptions() end if else !NOTE: a new object is created, and the old one ! is replaced and destroyed. This is to ! prevent memory leaks if the type is ! being changed (for example, if an array ! is being replaced with a scalar). if (p%var_type==json_integer) then p%int_value = value else call json%info(p,name=name) call json%create_integer(tmp,value,name) call json%replace(p,tmp,destroy=.true.) end if end if else if ( present(found) ) found = .false. if ( present(was_created) ) was_created = .false. end if end subroutine json_add_integer_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper to [[json_add_integer_by_path]] where "path" is kind=CDK. subroutine wrap_json_add_integer_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable integer(IK),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created call json%json_add_integer_by_path(me,to_unicode(path),value,found,was_created) end subroutine wrap_json_add_integer_by_path !***************************************************************************************** !***************************************************************************************** !> ! Add an double value to a [[json_value]], given the path. ! !@warning If the path points to an existing variable in the structure, ! then this routine will destroy it and replace it with the ! new value. subroutine json_add_double_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable real(RK),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created type(json_value),pointer :: p type(json_value),pointer :: tmp character(kind=CK,len=:),allocatable :: name !! variable name if ( .not. json%exception_thrown ) then nullify(p) ! return a pointer to the path (possibly creating it) ! If the variable had to be created, then ! it will be a json_null variable. call json%create(me,path,p,found,was_created) if (.not. associated(p)) then call json%throw_exception('Error in json_add_double_by_path:'//& ' Unable to resolve path: '//trim(path)) if (present(found)) then found = .false. call json%clear_exceptions() end if else !NOTE: a new object is created, and the old one ! is replaced and destroyed. This is to ! prevent memory leaks if the type is ! being changed (for example, if an array ! is being replaced with a scalar). if (p%var_type==json_double) then p%dbl_value = value else call json%info(p,name=name) call json%create_double(tmp,value,name) call json%replace(p,tmp,destroy=.true.) end if end if else if ( present(found) ) found = .false. if ( present(was_created) ) was_created = .false. end if end subroutine json_add_double_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper to [[json_add_double_by_path]] where "path" is kind=CDK. subroutine wrap_json_add_double_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable real(RK),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created call json%json_add_double_by_path(me,to_unicode(path),value,found,was_created) end subroutine wrap_json_add_double_by_path !***************************************************************************************** !***************************************************************************************** !> ! Add a logical value to a [[json_value]], given the path. ! !@warning If the path points to an existing variable in the structure, ! then this routine will destroy it and replace it with the ! new value. subroutine json_add_logical_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable logical(LK),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created type(json_value),pointer :: p type(json_value),pointer :: tmp character(kind=CK,len=:),allocatable :: name !! variable name if ( .not. json%exception_thrown ) then nullify(p) ! return a pointer to the path (possibly creating it) ! If the variable had to be created, then ! it will be a json_null variable. call json%create(me,path,p,found,was_created) if (.not. associated(p)) then call json%throw_exception('Error in json_add_logical_by_path:'//& ' Unable to resolve path: '//trim(path)) if (present(found)) then found = .false. call json%clear_exceptions() end if else !NOTE: a new object is created, and the old one ! is replaced and destroyed. This is to ! prevent memory leaks if the type is ! being changed (for example, if an array ! is being replaced with a scalar). if (p%var_type==json_logical) then p%log_value = value else call json%info(p,name=name) call json%create_logical(tmp,value,name) call json%replace(p,tmp,destroy=.true.) end if end if else if ( present(found) ) found = .false. if ( present(was_created) ) was_created = .false. end if end subroutine json_add_logical_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper to [[json_add_logical_by_path]] where "path" is kind=CDK. subroutine wrap_json_add_logical_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable logical(LK),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created call json%json_add_logical_by_path(me,to_unicode(path),value,found,was_created) end subroutine wrap_json_add_logical_by_path !***************************************************************************************** !***************************************************************************************** !> ! Add a string value to a [[json_value]], given the path. ! !@warning If the path points to an existing variable in the structure, ! then this routine will destroy it and replace it with the ! new value. subroutine json_add_string_by_path(json,me,path,value,found,& was_created,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable character(kind=CK,len=*),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for each element logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for each element type(json_value),pointer :: p type(json_value),pointer :: tmp character(kind=CK,len=:),allocatable :: name !! variable name if ( .not. json%exception_thrown ) then nullify(p) ! return a pointer to the path (possibly creating it) ! If the variable had to be created, then ! it will be a json_null variable. call json%create(me,path,p,found,was_created) if (.not. associated(p)) then call json%throw_exception('Error in json_add_string_by_path:'//& ' Unable to resolve path: '//trim(path)) if (present(found)) then found = .false. call json%clear_exceptions() end if else !NOTE: a new object is created, and the old one ! is replaced and destroyed. This is to ! prevent memory leaks if the type is ! being changed (for example, if an array ! is being replaced with a scalar). if (p%var_type==json_string) then p%str_value = value else call json%info(p,name=name) call json%create_string(tmp,value,name,trim_str,adjustl_str) call json%replace(p,tmp,destroy=.true.) end if end if else if ( present(found) ) found = .false. if ( present(was_created) ) was_created = .false. end if end subroutine json_add_string_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper to [[json_add_string_by_path]] where "path" is kind=CDK. subroutine wrap_json_add_string_by_path(json,me,path,value,found,& was_created,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable character(kind=CDK,len=*),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for each element logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for each element call json%json_add_string_by_path(me,to_unicode(path),to_unicode(value),& found,was_created,trim_str,adjustl_str) end subroutine wrap_json_add_string_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper for [[json_add_string_by_path]] where "path" is kind=CDK. subroutine json_add_string_by_path_path_ascii(json,me,path,value,found,& was_created,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable character(kind=CK,len=*),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for each element logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for each element call json%json_add_string_by_path(me,to_unicode(path),value,found,was_created,trim_str,adjustl_str) end subroutine json_add_string_by_path_path_ascii !***************************************************************************************** !***************************************************************************************** !> ! Wrapper for [[json_add_string_by_path]] where "value" is kind=CDK. subroutine json_add_string_by_path_value_ascii(json,me,path,value,found,& was_created,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable character(kind=CDK,len=*),intent(in) :: value !! the value to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for each element logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for each element call json%json_add_string_by_path(me,path,to_unicode(value),found,was_created,trim_str,adjustl_str) end subroutine json_add_string_by_path_value_ascii !***************************************************************************************** !***************************************************************************************** !> ! Wrapper to [[json_add_integer_by_path]] for adding an integer vector by path. subroutine json_add_integer_vec_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable integer(IK),dimension(:),intent(in) :: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created type(json_value),pointer :: p !! pointer to path (which may exist) type(json_value),pointer :: var !! new variable that is created integer(IK) :: i !! counter character(kind=CK,len=:),allocatable :: name !! the variable name logical(LK) :: p_found !! if the path was successfully found (or created) if ( .not. json%exception_thrown ) then !get a pointer to the variable !(creating it if necessary) call json%create(me,path,p,found=p_found) if (p_found) then call json%info(p,name=name) ! want to keep the existing name call json%create_array(var,name) ! create a new array variable call json%replace(p,var,destroy=.true.) ! replace p with this array (destroy p) !populate each element of the array: do i=1,size(value) call json%add(var, CK_'', value(i)) end do end if else if ( present(found) ) found = .false. if ( present(was_created) ) was_created = .false. end if end subroutine json_add_integer_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper for [[json_add_integer_vec_by_path]] where "path" is kind=CDK). subroutine wrap_json_add_integer_vec_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable integer(IK),dimension(:),intent(in) :: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created call json%json_add_integer_vec_by_path(me,to_unicode(path),value,found,was_created) end subroutine wrap_json_add_integer_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper to [[json_add_logical_by_path]] for adding a logical vector by path. subroutine json_add_logical_vec_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable logical(LK),dimension(:),intent(in) :: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created type(json_value),pointer :: p !! pointer to path (which may exist) type(json_value),pointer :: var !! new variable that is created integer(IK) :: i !! counter character(kind=CK,len=:),allocatable :: name !! the variable name logical(LK) :: p_found !! if the path was successfully found (or created) if ( .not. json%exception_thrown ) then !get a pointer to the variable !(creating it if necessary) call json%create(me,path,p,found=p_found) if (p_found) then call json%info(p,name=name) ! want to keep the existing name call json%create_array(var,name) ! create a new array variable call json%replace(p,var,destroy=.true.) ! replace p with this array (destroy p) !populate each element of the array: do i=1,size(value) call json%add(var, CK_'', value(i)) end do end if else if ( present(found) ) found = .false. if ( present(was_created) ) was_created = .false. end if end subroutine json_add_logical_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper for [[json_add_logical_vec_by_path]] where "path" is kind=CDK). subroutine wrap_json_add_logical_vec_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable logical(LK),dimension(:),intent(in) :: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created call json%json_add_logical_vec_by_path(me,to_unicode(path),value,found,was_created) end subroutine wrap_json_add_logical_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper to [[json_add_double_by_path]] for adding a double vector by path. subroutine json_add_double_vec_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable real(RK),dimension(:),intent(in) :: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created type(json_value),pointer :: p !! pointer to path (which may exist) type(json_value),pointer :: var !! new variable that is created integer(IK) :: i !! counter character(kind=CK,len=:),allocatable :: name !! the variable name logical(LK) :: p_found !! if the path was successfully found (or created) if ( .not. json%exception_thrown ) then !get a pointer to the variable !(creating it if necessary) call json%create(me,path,p,found=p_found) if (p_found) then call json%info(p,name=name) ! want to keep the existing name call json%create_array(var,name) ! create a new array variable call json%replace(p,var,destroy=.true.) ! replace p with this array (destroy p) !populate each element of the array: do i=1,size(value) call json%add(var, CK_'', value(i)) end do end if else if ( present(found) ) found = .false. if ( present(was_created) ) was_created = .false. end if end subroutine json_add_double_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper for [[json_add_double_vec_by_path]] where "path" is kind=CDK). subroutine wrap_json_add_double_vec_by_path(json,me,path,value,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable real(RK),dimension(:),intent(in) :: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created call json%json_add_double_vec_by_path(me,to_unicode(path),value,found,was_created) end subroutine wrap_json_add_double_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper to [[json_add_string_by_path]] for adding a string vector by path. ! !@note The `ilen` input can be used to specify the actual lengths of the ! the strings in the array. They must all be `<= len(value)`. subroutine json_add_string_vec_by_path(json,me,path,value,found,was_created,ilen,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable character(kind=CK,len=*),dimension(:),intent(in) :: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created integer(IK),dimension(:),intent(in),optional :: ilen !! the string lengths of each !! element in `value`. If not present, !! the full `len(value)` string is added !! for each element. logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for each element logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for each element type(json_value),pointer :: p !! pointer to path (which may exist) type(json_value),pointer :: var !! new variable that is created integer(IK) :: i !! counter character(kind=CK,len=:),allocatable :: name !! the variable name logical(LK) :: p_found !! if the path was successfully found (or created) if ( .not. json%exception_thrown ) then ! validate ilen array if present: if (present(ilen)) then if (size(ilen)/=size(value)) then call json%throw_exception('Error in json_add_string_vec_by_path: '//& 'Invalid size of ilen input vector.') if (present(found)) then found = .false. call json%clear_exceptions() end if if (present(was_created)) was_created = .false. return else ! also have to validate the specified lengths. ! (must not be greater than input string length) do i = 1, size(value) if (ilen(i)>len(value)) then call json%throw_exception('Error in json_add_string_vec_by_path: '//& 'Invalid ilen element.') if (present(found)) then found = .false. call json%clear_exceptions() end if if (present(was_created)) was_created = .false. return end if end do end if end if !get a pointer to the variable !(creating it if necessary) call json%create(me,path,p,found=p_found) if (p_found) then call json%info(p,name=name) ! want to keep the existing name call json%create_array(var,name) ! create a new array variable call json%replace(p,var,destroy=.true.) ! replace p with this array (destroy p) !populate each element of the array: do i=1,size(value) if (present(ilen)) then call json%add(var, CK_'', value(i)(1:ilen(i)), & trim_str=trim_str, adjustl_str=adjustl_str) else call json%add(var, CK_'', value(i), & trim_str=trim_str, adjustl_str=adjustl_str) end if end do end if else if ( present(found) ) found = .false. if ( present(was_created) ) was_created = .false. end if end subroutine json_add_string_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper for [[json_add_string_vec_by_path]] where "path" and "value" are kind=CDK). subroutine wrap_json_add_string_vec_by_path(json,me,path,value,& found,was_created,ilen,& trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable character(kind=CDK,len=*),dimension(:),intent(in):: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created integer(IK),dimension(:),intent(in),optional :: ilen !! the string lengths of each !! element in `value`. If not present, !! the full `len(value)` string is added !! for each element. logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for each element logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for each element call json%json_add_string_vec_by_path(me,to_unicode(path),to_unicode(value),& found,was_created,ilen,trim_str,adjustl_str) end subroutine wrap_json_add_string_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper for [[json_add_string_vec_by_path]] where "value" is kind=CDK). subroutine json_add_string_vec_by_path_value_ascii(json,me,path,value,& found,was_created,ilen,& trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CK,len=*),intent(in) :: path !! the path to the variable character(kind=CDK,len=*),dimension(:),intent(in):: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created integer(IK),dimension(:),intent(in),optional :: ilen !! the string lengths of each !! element in `value`. If not present, !! the full `len(value)` string is added !! for each element. logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for each element logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for each element call json%json_add_string_vec_by_path(me,path,to_unicode(value),& found,was_created,ilen,trim_str,adjustl_str) end subroutine json_add_string_vec_by_path_value_ascii !***************************************************************************************** !***************************************************************************************** !> ! Wrapper for [[json_add_string_vec_by_path]] where "path" is kind=CDK). subroutine json_add_string_vec_by_path_path_ascii(json,me,path,value,& found,was_created,ilen,& trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me !! the JSON structure character(kind=CDK,len=*),intent(in) :: path !! the path to the variable character(kind=CK,len=*),dimension(:),intent(in) :: value !! the vector to add logical(LK),intent(out),optional :: found !! if the variable was found logical(LK),intent(out),optional :: was_created !! if the variable had to be created integer(IK),dimension(:),intent(in),optional :: ilen !! the string lengths of each !! element in `value`. If not present, !! the full `len(value)` string is added !! for each element. logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for each element logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for each element call json%json_add_string_vec_by_path(me,to_unicode(path),value,& found,was_created,ilen,trim_str,adjustl_str) end subroutine json_add_string_vec_by_path_path_ascii !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/19/2014 ! ! Add a real value child to the [[json_value]] variable. ! !@note This routine is part of the public API that can be ! used to build a JSON structure using [[json_value]] pointers. subroutine json_value_add_double(json,p,name,val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name !! variable name real(RK),intent(in) :: val !! real value type(json_value),pointer :: var !create the variable: call json%create_double(var,val,name) !add it: call json%add(p, var) end subroutine json_value_add_double !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_double]] where `name` is kind=CDK. subroutine wrap_json_value_add_double(json,p,name,val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name !! variable name real(RK),intent(in) :: val !! real value call json%add(p, to_unicode(name), val) end subroutine wrap_json_value_add_double !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/20/2014 ! ! Add a real vector child to the [[json_value]] variable. ! !@note This routine is part of the public API that can be ! used to build a JSON structure using [[json_value]] pointers. subroutine json_value_add_double_vec(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name real(RK),dimension(:),intent(in) :: val type(json_value),pointer :: var integer(IK) :: i !! counter !create the variable as an array: call json%create_array(var,name) !populate the array: do i=1,size(val) call json%add(var, CK_'', val(i)) end do !add it: call json%add(p, var) end subroutine json_value_add_double_vec !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_double_vec]] where `name` is kind=CDK. subroutine wrap_json_value_add_double_vec(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name real(RK),dimension(:),intent(in) :: val call json%add(p, to_unicode(name), val) end subroutine wrap_json_value_add_double_vec !***************************************************************************************** !***************************************************************************************** !> ! Add a NULL value child to the [[json_value]] variable. ! !@note This routine is part of the public API that can be ! used to build a JSON structure using [[json_value]] pointers. subroutine json_value_add_null(json, p, name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name type(json_value),pointer :: var !create the variable: call json%create_null(var,name) !add it: call json%add(p, var) end subroutine json_value_add_null !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_null]] where `name` is kind=CDK. subroutine wrap_json_value_add_null(json, p, name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name !! name of the variable call json%add(p, to_unicode(name)) end subroutine wrap_json_value_add_null !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/20/2014 ! ! Add an integer value child to the [[json_value]] variable. ! !@note This routine is part of the public API that can be ! used to build a JSON structure using [[json_value]] pointers. subroutine json_value_add_integer(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name integer(IK),intent(in) :: val type(json_value),pointer :: var !create the variable: call json%create_integer(var,val,name) !add it: call json%add(p, var) end subroutine json_value_add_integer !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_integer]] where `name` is kind=CDK. subroutine wrap_json_value_add_integer(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name !! name of the variable integer(IK),intent(in) :: val !! value call json%add(p, to_unicode(name), val) end subroutine wrap_json_value_add_integer !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/20/2014 ! ! Add a integer vector child to the [[json_value]] variable. ! !@note This routine is part of the public API that can be ! used to build a JSON structure using [[json_value]] pointers. subroutine json_value_add_integer_vec(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name !! name of the variable integer(IK),dimension(:),intent(in) :: val !! value type(json_value),pointer :: var integer(IK) :: i !! counter !create a variable as an array: call json%create_array(var,name) !populate the array: do i=1,size(val) call json%add(var, CK_'', val(i)) end do !add it: call json%add(p, var) end subroutine json_value_add_integer_vec !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_integer_vec]] where `name` is kind=CDK. subroutine wrap_json_value_add_integer_vec(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name !! name of the variable integer(IK),dimension(:),intent(in) :: val !! value call json%add(p, to_unicode(name), val) end subroutine wrap_json_value_add_integer_vec !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/20/2014 ! ! Add a logical value child to the [[json_value]] variable. ! !@note This routine is part of the public API that can be ! used to build a JSON structure using [[json_value]] pointers. subroutine json_value_add_logical(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name !! name of the variable logical(LK),intent(in) :: val !! value type(json_value),pointer :: var !create the variable: call json%create_logical(var,val,name) !add it: call json%add(p, var) end subroutine json_value_add_logical !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_logical]] where `name` is kind=CDK. subroutine wrap_json_value_add_logical(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name !! name of the variable logical(LK),intent(in) :: val !! value call json%add(p, to_unicode(name), val) end subroutine wrap_json_value_add_logical !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/20/2014 ! ! Add a logical vector child to the [[json_value]] variable. ! !@note This routine is part of the public API that can be ! used to build a JSON structure using [[json_value]] pointers. subroutine json_value_add_logical_vec(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name !! name of the vector logical(LK),dimension(:),intent(in) :: val !! value type(json_value),pointer :: var integer(IK) :: i !! counter !create the variable as an array: call json%create_array(var,name) !populate the array: do i=1,size(val) call json%add(var, CK_'', val(i)) end do !add it: call json%add(p, var) end subroutine json_value_add_logical_vec !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_logical_vec]] where `name` is kind=CDK. subroutine wrap_json_value_add_logical_vec(json, p, name, val) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name !! name of the variable logical(LK),dimension(:),intent(in) :: val !! value call json%add(p, to_unicode(name), val) end subroutine wrap_json_value_add_logical_vec !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/19/2014 ! ! Add a character string child to the [[json_value]] variable. ! !@note This routine is part of the public API that can be ! used to build a JSON structure using [[json_value]] pointers. subroutine json_value_add_string(json, p, name, val, trim_str, adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name !! name of the variable character(kind=CK,len=*),intent(in) :: val !! value logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` type(json_value),pointer :: var !create the variable: call json%create_string(var,val,name,trim_str,adjustl_str) !add it: call json%add(p, var) end subroutine json_value_add_string !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_string]] where `name` and `val` are kind=CDK. subroutine wrap_json_value_add_string(json, p, name, val, trim_str, adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name !! name of the variable character(kind=CDK,len=*),intent(in) :: val !! value logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` call json%add(p, to_unicode(name), to_unicode(val), trim_str, adjustl_str) end subroutine wrap_json_value_add_string !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_string]] where `name` is kind=CDK. subroutine json_value_add_string_name_ascii(json, p, name, val, trim_str, adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name !! name of the variable character(kind=CK, len=*),intent(in) :: val !! value logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` call json%add(p, to_unicode(name), val, trim_str, adjustl_str) end subroutine json_value_add_string_name_ascii !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_string]] where `val` is kind=CDK. subroutine json_value_add_string_val_ascii(json, p, name, val, trim_str, adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK, len=*),intent(in) :: name !! name of the variable character(kind=CDK,len=*),intent(in) :: val !! value logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` call json%add(p, name, to_unicode(val), trim_str, adjustl_str) end subroutine json_value_add_string_val_ascii !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/19/2014 ! ! Add a character string vector child to the [[json_value]] variable. ! !@note This routine is part of the public API that can be ! used to build a JSON structure using [[json_value]] pointers. subroutine json_value_add_string_vec(json, p, name, val, trim_str, adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name !! variable name character(kind=CK,len=*),dimension(:),intent(in) :: val !! array of strings logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for each element logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for each element type(json_value),pointer :: var integer(IK) :: i !! counter !create the variable as an array: call json%create_array(var,name) !populate the array: do i=1,size(val) call json%add(var, CK_'', val(i), trim_str, adjustl_str) end do !add it: call json%add(p, var) end subroutine json_value_add_string_vec !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_string_vec]] where `name` and `val` are kind=CDK. subroutine wrap_json_value_add_string_vec(json, p, name, val, trim_str, adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name character(kind=CDK,len=*),dimension(:),intent(in) :: val logical(LK),intent(in),optional :: trim_str logical(LK),intent(in),optional :: adjustl_str call json%add(p, to_unicode(name), to_unicode(val), trim_str, adjustl_str) end subroutine wrap_json_value_add_string_vec !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_string_vec]] where `name` is kind=CDK. subroutine json_value_add_string_vec_name_ascii(json, p, name, val, trim_str, adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name character(kind=CK, len=*),dimension(:),intent(in) :: val logical(LK),intent(in),optional :: trim_str logical(LK),intent(in),optional :: adjustl_str call json%add(p, to_unicode(name), val, trim_str, adjustl_str) end subroutine json_value_add_string_vec_name_ascii !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_add_string_vec]] where `val` is kind=CDK. subroutine json_value_add_string_vec_val_ascii(json, p, name, val, trim_str, adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK, len=*),intent(in) :: name character(kind=CDK,len=*),dimension(:),intent(in) :: val logical(LK),intent(in),optional :: trim_str logical(LK),intent(in),optional :: adjustl_str call json%add(p, name, to_unicode(val), trim_str, adjustl_str) end subroutine json_value_add_string_vec_val_ascii !***************************************************************************************** !***************************************************************************************** !> ! Count the number of children in the object or array. ! !### History ! * JW : 1/4/2014 : Original routine removed. ! Now using `n_children` variable. ! Renamed from `json_value_count`. function json_count(json,p) result(count) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! this should normally be a `json_object` !! or a `json_array`. For any other !! variable type this will return 0. integer(IK) :: count !! number of children in `p`. if (associated(p)) then count = p%n_children else call json%throw_exception('Error in json_count: '//& 'pointer is not associated.') end if end function json_count !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 10/16/2015 ! ! Returns a pointer to the parent of a [[json_value]]. ! If there is no parent, then a `null()` pointer is returned. subroutine json_get_parent(json,p,parent) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! JSON object type(json_value),pointer,intent(out) :: parent !! pointer to `parent` if (associated(p)) then parent => p%parent else nullify(parent) call json%throw_exception('Error in json_get_parent: '//& 'pointer is not associated.') end if end subroutine json_get_parent !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 10/31/2015 ! ! Returns a pointer to the next of a [[json_value]]. ! If there is no next, then a `null()` pointer is returned. subroutine json_get_next(json,p,next) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! JSON object type(json_value),pointer,intent(out) :: next !! pointer to `next` if (associated(p)) then next => p%next else nullify(next) call json%throw_exception('Error in json_get_next: '//& 'pointer is not associated.') end if end subroutine json_get_next !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 10/31/2015 ! ! Returns a pointer to the previous of a [[json_value]]. ! If there is no previous, then a `null()` pointer is returned. subroutine json_get_previous(json,p,previous) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! JSON object type(json_value),pointer,intent(out) :: previous !! pointer to `previous` if (associated(p)) then previous => p%previous else nullify(previous) call json%throw_exception('Error in json_get_previous: '//& 'pointer is not associated.') end if end subroutine json_get_previous !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 10/31/2015 ! ! Returns a pointer to the tail of a [[json_value]] ! (the last child of an array of object). ! If there is no tail, then a `null()` pointer is returned. subroutine json_get_tail(json,p,tail) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! JSON object type(json_value),pointer,intent(out) :: tail !! pointer to `tail` if (associated(p)) then tail => p%tail else nullify(tail) call json%throw_exception('Error in json_get_tail: '//& 'pointer is not associated.') end if end subroutine json_get_tail !***************************************************************************************** !***************************************************************************************** !> ! Returns a child in the object or array given the index. subroutine json_value_get_child_by_index(json, p, idx, child, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! object or array JSON data integer(IK),intent(in) :: idx !! index of the child !! (this is a 1-based Fortran !! style array index). type(json_value),pointer :: child !! pointer to the child logical(LK),intent(out),optional :: found !! true if the value was found !! (if not present, an exception !! will be thrown if it was not !! found. If present and not !! found, no exception will be !! thrown). integer(IK) :: i !! counter nullify(child) if (.not. json%exception_thrown) then if (associated(p%children)) then child => p%children do i = 1, idx - 1 if (associated(child%next)) then child => child%next else call json%throw_exception('Error in json_value_get_child_by_index:'//& ' child%next is not associated.') nullify(child) exit end if end do else call json%throw_exception('Error in json_value_get_child_by_index:'//& ' p%children is not associated.') end if ! found output: if (json%exception_thrown) then if (present(found)) then call json%clear_exceptions() found = .false. end if else if (present(found)) found = .true. end if else if (present(found)) found = .false. end if end subroutine json_value_get_child_by_index !***************************************************************************************** !***************************************************************************************** !> ! Returns pointer to the first child of the object ! (or `null()` if it is not associated). subroutine json_value_get_child(json, p, child) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! object or array JSON data type(json_value),pointer :: child !! pointer to the child if (associated(p)) then child => p%children else nullify(child) call json%throw_exception('Error in json_value_get_child: '//& 'pointer is not associated.') end if end subroutine json_value_get_child !***************************************************************************************** !***************************************************************************************** !> ! Returns a child in the object or array given the name string. ! ! The name search can be case-sensitive or not, and can have significant trailing ! whitespace or not, depending on the settings in the [[json_core(type)]] class. ! !@note The `name` input is not a path, and is not parsed like it is in [[json_get_by_path]]. subroutine json_value_get_child_by_name(json, p, name, child, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p character(kind=CK,len=*),intent(in) :: name !! the name of a child of `p` type(json_value),pointer :: child !! pointer to the child logical(LK),intent(out),optional :: found !! true if the value was found !! (if not present, an exception !! will be thrown if it was not !! found. If present and not !! found, no exception will be !! thrown). integer(IK) :: i,n_children logical :: error nullify(child) if (.not. json%exception_thrown) then if (associated(p)) then error = .true. ! will be false if it is found if (p%var_type==json_object) then n_children = json%count(p) child => p%children !start with first one do i=1, n_children if (.not. associated(child)) then call json%throw_exception(& 'Error in json_value_get_child_by_name: '//& 'Malformed JSON linked list') exit end if if (allocated(child%name)) then !name string matching routine: if (json%name_equal(child,name)) then error = .false. exit end if end if child => child%next end do end if if (error) then !did not find anything: call json%throw_exception(& 'Error in json_value_get_child_by_name: '//& 'child variable '//trim(name)//' was not found.') nullify(child) end if else call json%throw_exception(& 'Error in json_value_get_child_by_name: '//& 'pointer is not associated.') end if ! found output: if (json%exception_thrown) then if (present(found)) then call json%clear_exceptions() found = .false. end if else if (present(found)) found = .true. end if else if (present(found)) found = .false. end if end subroutine json_value_get_child_by_name !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 8/25/2017 ! ! Checks a JSON object for duplicate child names. ! ! It uses the specified settings for name matching (see [[name_strings_equal]]). ! !@note This will only check for one duplicate, ! it will return the first one that it finds. subroutine json_check_children_for_duplicate_keys(json,p,has_duplicate,name,path) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! the object to search. If `p` is !! not a `json_object`, then `has_duplicate` !! will be false. logical(LK),intent(out) :: has_duplicate !! true if there is at least !! two children have duplicate !! `name` values. character(kind=CK,len=:),allocatable,intent(out),optional :: name !! the duplicate name !! (unallocated if no !! duplicate was found) character(kind=CK,len=:),allocatable,intent(out),optional :: path !! the full path to the !! duplicate name !! (unallocated if no !! duplicate was found) integer(IK) :: i !! counter integer(IK) :: j !! counter type(json_value),pointer :: child !! pointer to a child of `p` integer(IK) :: n_children !! number of children of `p` logical(LK) :: found !! flag for `get_child` type :: alloc_str !! so we can have an array of allocatable strings character(kind=CK,len=:),allocatable :: str !! name string end type alloc_str type(alloc_str),dimension(:),allocatable :: names !! array of all the !! child name strings ! initialize: has_duplicate =.false. if (.not. json%exception_thrown) then if (associated(p)) then if (p%var_type==json_object) then ! number of items to check: n_children = json%count(p) allocate(names(n_children)) ! first get a list of all the name keys: do i=1, n_children call json%get_child(p,i,child,found) ! get by index if (.not. found) then call json%throw_exception(& 'Error in json_check_children_for_duplicate_keys: '//& 'Malformed JSON linked list') exit end if if (allocated(child%name)) then names(i)%str = child%name else call json%throw_exception(& 'Error in json_check_children_for_duplicate_keys: '//& 'Object child name is not allocated') exit end if end do if (.not. json%exception_thrown) then ! now check the list for duplicates: main: do i=1,n_children do j=1,i-1 if (json%name_strings_equal(names(i)%str,names(j)%str)) then has_duplicate = .true. if (present(name)) then name = names(i)%str end if if (present(path)) then call json%get_child(p,names(i)%str,child,found) ! get by name if (found) then call json%get_path(child,path,found) if (.not. found) then ! should never happen since we know it is there call json%throw_exception(& 'Error in json_check_children_for_duplicate_keys: '//& 'Could not get path') end if else ! should never happen since we know it is there call json%throw_exception(& 'Error in json_check_children_for_duplicate_keys: '//& 'Could not get child: '//trim(names(i)%str)) end if end if exit main end if end do end do main end if ! cleanup do i=1,n_children if (allocated(names(i)%str)) deallocate(names(i)%str) end do if (allocated(names)) deallocate(names) end if end if end if end subroutine json_check_children_for_duplicate_keys !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 8/25/2017 ! ! Checks a JSON structure for duplicate child names. ! This one recursively traverses the entire structure ! (calling [[json_check_children_for_duplicate_keys]] ! recursively for each element). ! !@note This will only check for one duplicate, ! it will return the first one that it finds. subroutine json_check_all_for_duplicate_keys(json,p,has_duplicate,name,path) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! the object to search. If `p` is !! not a `json_object`, then `has_duplicate` !! will be false. logical(LK),intent(out) :: has_duplicate !! true if there is at least !! one duplicate `name` key anywhere !! in the structure. character(kind=CK,len=:),allocatable,intent(out),optional :: name !! the duplicate name !! (unallocated if no !! duplicates were found) character(kind=CK,len=:),allocatable,intent(out),optional :: path !! the full path to the !! duplicate name !! (unallocated if no !! duplicate was found) has_duplicate = .false. if (.not. json%exception_thrown) then call json%traverse(p,duplicate_key_func) end if contains subroutine duplicate_key_func(json,p,finished) !! Callback function to check each element !! for duplicate child names. implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p logical(LK),intent(out) :: finished #if defined __GFORTRAN__ ! this is a workaround for a gfortran bug (6 and 7), character(kind=CK,len=:),allocatable :: tmp_name !! temp variable for `name` string character(kind=CK,len=:),allocatable :: tmp_path !! temp variable for `path` string if (present(name) .and. present(path)) then call json%check_children_for_duplicate_keys(p,has_duplicate,name=tmp_name,path=tmp_path) else if (present(name) .and. .not. present(path)) then call json%check_children_for_duplicate_keys(p,has_duplicate,name=tmp_name) else if (.not. present(name) .and. present(path)) then call json%check_children_for_duplicate_keys(p,has_duplicate,path=tmp_path) else call json%check_children_for_duplicate_keys(p,has_duplicate) end if if (has_duplicate) then if (present(name)) name = tmp_name if (present(path)) path = tmp_path end if #else call json%check_children_for_duplicate_keys(p,has_duplicate,name,path) #endif finished = has_duplicate .or. json%exception_thrown end subroutine duplicate_key_func end subroutine json_check_all_for_duplicate_keys !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_value_get_child_by_name]] where `name` is kind=CDK. subroutine wrap_json_value_get_child_by_name(json, p, name, child, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p character(kind=CDK,len=*),intent(in) :: name type(json_value),pointer :: child logical(LK),intent(out),optional :: found call json%get(p,to_unicode(name),child,found) end subroutine wrap_json_value_get_child_by_name !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 2/12/2014 ! ! Print the [[json_value]] structure to an allocatable string. subroutine json_value_to_string(json,p,str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p character(kind=CK,len=:),intent(out),allocatable :: str !! prints structure to this string str = CK_'' call json%json_value_print(p, iunit=unit2str, str=str, indent=1_IK, colon=.true.) end subroutine json_value_to_string !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 6/20/2014 ! ! Print the [[json_value]] structure to a file. subroutine json_print_to_unit(json,p,iunit) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p integer(IK),intent(in) :: iunit !! the file unit (the file must !! already have been opened, can't be -1). character(kind=CK,len=:),allocatable :: dummy !! dummy for `str` argument !! to [[json_value_print]] if (iunit/=unit2str) then call json%json_value_print(p,iunit,str=dummy, indent=1_IK, colon=.true.) else call json%throw_exception('Error in json_print_to_unit: iunit must not be -1.') end if end subroutine json_print_to_unit !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/23/2014 ! ! Print the [[json_value]] structure to a file. subroutine json_print_to_filename(json,p,filename) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p character(kind=CDK,len=*),intent(in) :: filename !! the filename to print to !! (should not already be open) integer(IK) :: iunit !! file unit for `open` statement integer(IK) :: istat !! `iostat` code for `open` statement open(newunit=iunit,file=filename,status='REPLACE',iostat=istat FILE_ENCODING ) if (istat==0) then call json%print(p,iunit) close(iunit,iostat=istat) else call json%throw_exception('Error in json_print_to_filename: could not open file: '//& trim(filename)) end if end subroutine json_print_to_filename !***************************************************************************************** !***************************************************************************************** !> ! Print the JSON structure to a string or a file. ! !### Notes ! * This is an internal routine called by the various wrapper routines. ! * The reason the `str` argument is non-optional is because of a ! bug in v4.9 of the gfortran compiler. recursive subroutine json_value_print(json,p,iunit,str,indent,& need_comma,colon,is_array_element,& is_compressed_vector) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p integer(IK),intent(in) :: iunit !! file unit to write to (the !! file is assumed to be open) integer(IK),intent(in),optional :: indent !! indention level logical(LK),intent(in),optional :: is_array_element !! if this is an array element logical(LK),intent(in),optional :: need_comma !! if it needs a comma after it logical(LK),intent(in),optional :: colon !! if the colon was just written character(kind=CK,len=:),intent(inout),allocatable :: str !! if `iunit==unit2str` (-1) then !! the structure is printed to this !! string rather than a file. This mode !! is used by [[json_value_to_string]]. logical(LK),intent(in),optional :: is_compressed_vector !! if True, this is an element !! from an array being printed !! on one line [default is False] character(kind=CK,len=max_numeric_str_len) :: tmp !! for value to string conversions character(kind=CK,len=:),allocatable :: s !! the string of spaces for !! indenting (see `tab` and `spaces`) type(json_value),pointer :: element !! for getting children integer(IK) :: tab !! number of `tabs` for indenting integer(IK) :: spaces !! number of spaces for indenting integer(IK) :: i !! counter integer(IK) :: count !! number of children logical(LK) :: print_comma !! if the comma will be printed after the value logical(LK) :: write_file !! if we are writing to a file logical(LK) :: write_string !! if we are writing to a string logical(LK) :: is_array !! if this is an element in an array integer(IK) :: var_type !! for getting the variable type of children integer(IK) :: var_type_prev !! for getting the variable type of children logical(LK) :: is_vector !! if all elements of a vector !! are scalars of the same type character(kind=CK,len=:),allocatable :: str_escaped !! escaped version of !! `name` or `str_value` if (.not. json%exception_thrown) then if (.not. associated(p)) then ! note: a null() pointer will trigger this error. ! However, if the pointer is undefined, then this will ! crash (if this wasn't here it would crash below when ! we try to access the contents) call json%throw_exception('Error in json_value_print: '//& 'the pointer is not associated') return end if if (present(is_compressed_vector)) then is_vector = is_compressed_vector else is_vector = .false. end if !whether to write a string or a file (one or the other): write_string = (iunit==unit2str) write_file = .not. write_string !if the comma will be printed after the value ! [comma not printed for the last elements] if (present(need_comma)) then print_comma = need_comma else print_comma = .false. end if !number of "tabs" to indent: if (present(indent) .and. .not. json%no_whitespace) then tab = indent else tab = 0 end if !convert to number of spaces: spaces = tab*json%spaces_per_tab !if this is an element in an array: if (present(is_array_element)) then is_array = is_array_element else is_array = .false. end if !if the colon was the last thing written if (present(colon)) then s = CK_'' else s = repeat(space, spaces) end if select case (p%var_type) case (json_object) count = json%count(p) if (count==0) then !special case for empty object call write_it( s//start_object//end_object, comma=print_comma ) else call write_it( s//start_object ) !if an object is in an array, there is an extra tab: if (is_array) then if ( .not. json%no_whitespace) tab = tab+1 spaces = tab*json%spaces_per_tab end if nullify(element) element => p%children do i = 1, count if (.not. associated(element)) then call json%throw_exception('Error in json_value_print: '//& 'Malformed JSON linked list') return end if ! print the name if (allocated(element%name)) then call escape_string(element%name,str_escaped,json%escape_solidus) if (json%no_whitespace) then !compact printing - no extra space call write_it(repeat(space, spaces)//quotation_mark//& str_escaped//quotation_mark//colon_char,& advance=.false.) else call write_it(repeat(space, spaces)//quotation_mark//& str_escaped//quotation_mark//colon_char//space,& advance=.false.) end if else call json%throw_exception('Error in json_value_print:'//& ' element%name not allocated') nullify(element) return end if ! recursive print of the element call json%json_value_print(element, iunit=iunit, indent=tab + 1, & need_comma=i<count, colon=.true., str=str) if (json%exception_thrown) return ! get the next child the list: element => element%next end do ! [one fewer tab if it isn't an array element] if (.not. is_array) s = repeat(space, max(0,spaces-json%spaces_per_tab)) call write_it( s//end_object, comma=print_comma ) nullify(element) end if case (json_array) count = json%count(p) if (json%compress_vectors) then ! check to see if every child is the same type, ! and a scalar: is_vector = .true. var_type_prev = -1 ! an invalid value nullify(element) element => p%children do i = 1, count if (.not. associated(element)) then call json%throw_exception('Error in json_value_print: '//& 'Malformed JSON linked list') return end if ! check variable type of all the children. ! They must all be the same, and a scalar. call json%info(element,var_type=var_type) if (var_type==json_object .or. & var_type==json_array .or. & (i>1 .and. var_type/=var_type_prev)) then is_vector = .false. exit end if var_type_prev = var_type ! get the next child the list: element => element%next end do else is_vector = .false. end if if (count==0) then !special case for empty array call write_it( s//start_array//end_array, comma=print_comma ) else call write_it( s//start_array, advance=(.not. is_vector) ) !if an array is in an array, there is an extra tab: if (is_array) then if ( .not. json%no_whitespace) tab = tab+1 spaces = tab*json%spaces_per_tab end if nullify(element) element => p%children do i = 1, count if (.not. associated(element)) then call json%throw_exception('Error in json_value_print: '//& 'Malformed JSON linked list') return end if ! recursive print of the element if (is_vector) then call json%json_value_print(element, iunit=iunit, indent=0,& need_comma=i<count, is_array_element=.false., str=str,& is_compressed_vector = .true.) else call json%json_value_print(element, iunit=iunit, indent=tab,& need_comma=i<count, is_array_element=.true., str=str) end if if (json%exception_thrown) return ! get the next child the list: element => element%next end do !indent the closing array character: if (is_vector) then call write_it( end_array,comma=print_comma ) else call write_it( repeat(space, max(0,spaces-json%spaces_per_tab))//end_array,& comma=print_comma ) end if nullify(element) end if case (json_null) call write_it( s//null_str, comma=print_comma, & advance=(.not. is_vector),& space_after_comma=is_vector ) case (json_string) if (allocated(p%str_value)) then ! have to escape the string for printing: call escape_string(p%str_value,str_escaped,json%escape_solidus) call write_it( s//quotation_mark// & str_escaped//quotation_mark, & comma=print_comma, & advance=(.not. is_vector),& space_after_comma=is_vector ) else call json%throw_exception('Error in json_value_print:'//& ' p%value_string not allocated') return end if case (json_logical) if (p%log_value) then call write_it( s//true_str, comma=print_comma, & advance=(.not. is_vector),& space_after_comma=is_vector ) else call write_it( s//false_str, comma=print_comma, & advance=(.not. is_vector),& space_after_comma=is_vector ) end if case (json_integer) call integer_to_string(p%int_value,int_fmt,tmp) call write_it( s//trim(tmp), comma=print_comma, & advance=(.not. is_vector),& space_after_comma=is_vector ) case (json_double) if (allocated(json%real_fmt)) then call real_to_string(p%dbl_value,json%real_fmt,json%compact_real,tmp) else !use the default format (user has not called initialize() or specified one): call real_to_string(p%dbl_value,default_real_fmt,json%compact_real,tmp) end if call write_it( s//trim(tmp), comma=print_comma, & advance=(.not. is_vector),& space_after_comma=is_vector ) case default call json%throw_exception('Error in json_value_print: unknown data type') end select !cleanup: if (allocated(s)) deallocate(s) end if contains subroutine write_it(s,advance,comma,space_after_comma) !! write the string to the file (or the output string) implicit none character(kind=CK,len=*),intent(in) :: s !! string to print logical(LK),intent(in),optional :: advance !! to add line break or not logical(LK),intent(in),optional :: comma !! print comma after the string logical(LK),intent(in),optional :: space_after_comma !! print a space after the comma logical(LK) :: add_comma !! if a delimiter is to be added after string logical(LK) :: add_line_break !! if a line break is to be added after string logical(LK) :: add_space !! if a space is to be added after the comma character(kind=CK,len=:),allocatable :: s2 !! temporary string if (present(comma)) then add_comma = comma else add_comma = .false. !default is not to add comma end if if (json%no_whitespace) then add_space = .false. else if (present(space_after_comma)) then add_space = space_after_comma else add_space = .false. !default is not to add space end if end if if (present(advance)) then if (json%no_whitespace) then ! overrides input value: add_line_break = .false. else add_line_break = advance end if else add_line_break = .not. json%no_whitespace ! default is to advance if ! we are printing whitespace end if !string to print: s2 = s if (add_comma) then s2 = s2 // delimiter if (add_space) s2 = s2 // space end if if (write_file) then if (add_line_break) then write(iunit,fmt='(A)') s2 else write(iunit,fmt='(A)',advance='NO') s2 end if else !write string str = str // s2 if (add_line_break) str = str // newline end if !cleanup: if (allocated(s2)) deallocate(s2) end subroutine write_it end subroutine json_value_print !***************************************************************************************** !***************************************************************************************** !> ! Returns true if the `path` is present in the `p` JSON structure. ! !@note Just a wrapper for [[json_get_by_path]], so it uses the ! specified `path_mode` and other settings. function json_valid_path(json, p, path) result(found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! a JSON linked list character(kind=CK,len=*),intent(in) :: path !! path to the variable logical(LK) :: found !! true if it was found type(json_value),pointer :: tmp !! pointer to the variable specified by `path` call json%get(p, path, tmp, found) end function json_valid_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_valid_path]] where "path" is kind=CDK. function wrap_json_valid_path(json, p, path) result(found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! a JSON linked list character(kind=CDK,len=*),intent(in) :: path !! path to the variable logical(LK) :: found !! true if it was found found = json%valid_path(p, to_unicode(path)) end function wrap_json_valid_path !***************************************************************************************** !***************************************************************************************** !> ! Returns the [[json_value]] pointer given the path string. ! ! It uses one of three methods: ! ! * The original JSON-Fortran defaults ! * [RFC 6901](https://tools.ietf.org/html/rfc6901) ! * [JSONPath](http://goessner.net/articles/JsonPath/) "bracket-notation" subroutine json_get_by_path(json, me, path, p, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me !! a JSON linked list character(kind=CK,len=*),intent(in) :: path !! path to the variable type(json_value),pointer,intent(out) :: p !! pointer to the variable !! specified by `path` logical(LK),intent(out),optional :: found !! true if it was found character(kind=CK,len=max_integer_str_len),allocatable :: path_mode_str !! string version !! of `json%path_mode` nullify(p) if (.not. json%exception_thrown) then select case (json%path_mode) case(1_IK) call json%json_get_by_path_default(me, path, p, found) case(2_IK) call json%json_get_by_path_rfc6901(me, path, p, found) case(3_IK) call json%json_get_by_path_jsonpath_bracket(me, path, p, found) case default call integer_to_string(json%path_mode,int_fmt,path_mode_str) call json%throw_exception('Error in json_get_by_path: Unsupported path_mode: '//& trim(path_mode_str)) if (present(found)) found = .false. end select if (present(found)) then if (.not. found) call json%clear_exceptions() end if else if (present(found)) found = .false. end if end subroutine json_get_by_path !***************************************************************************************** !***************************************************************************************** !> ! Returns the [[json_value]] pointer given the path string, ! If necessary, by creating the variables as needed. ! ! By default, the leaf node and any empty array elements ! are created as `json_null` values. ! ! It only works for `path_mode=1` or `path_mode=3`. ! An error will be thrown for `path_mode=2` (RFC 6901). ! !### See also ! * [[json_get_by_path]] subroutine json_create_by_path(json,me,path,p,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me !! a JSON linked list character(kind=CK,len=*),intent(in) :: path !! path to the variable type(json_value),pointer,intent(out),optional :: p !! pointer to the variable !! specify by `path` logical(LK),intent(out),optional :: found !! true if there were no errors !! (variable found or created) logical(LK),intent(out),optional :: was_created !! true if it was actually created !! (as opposed to already being there) type(json_value),pointer :: tmp character(kind=CK,len=max_integer_str_len) :: path_mode_str !! string version !! of `json%path_mode` if (present(p)) nullify(p) if (.not. json%exception_thrown) then select case (json%path_mode) case(1_IK) call json%json_get_by_path_default(me,path,tmp,found,& create_it=.true.,& was_created=was_created) if (present(p)) p => tmp case(3_IK) call json%json_get_by_path_jsonpath_bracket(me,path,tmp,found,& create_it=.true.,& was_created=was_created) if (present(p)) p => tmp case default if (json%path_mode==2_IK) then ! the problem here is there isn't really a way to disambiguate ! the array elements, so '/a/0' could be 'a(1)' or 'a.0'. call json%throw_exception('Error in json_create_by_path: '//& 'Create by path not supported in RFC 6901 path mode.') else call integer_to_string(json%path_mode,int_fmt,path_mode_str) call json%throw_exception('Error in json_create_by_path: Unsupported path_mode: '//& trim(path_mode_str)) end if if (present(found)) then call json%clear_exceptions() found = .false. end if if (present(was_created)) was_created = .false. end select else if (present(was_created)) was_created = .false. if (present(found)) found = .false. end if end subroutine json_create_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_create_by_path]] where "path" is kind=CDK. subroutine wrap_json_create_by_path(json,me,path,p,found,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me !! a JSON linked list character(kind=CDK,len=*),intent(in) :: path !! path to the variable type(json_value),pointer,intent(out),optional :: p !! pointer to the variable !! specify by `path` logical(LK),intent(out),optional :: found !! true if there were no errors !! (variable found or created) logical(LK),intent(out),optional :: was_created !! true if it was actually created !! (as opposed to already being there) call json%create(me,to_unicode(path),p,found,was_created) end subroutine wrap_json_create_by_path !***************************************************************************************** !***************************************************************************************** !> ! Rename a [[json_value]], given the path. ! !@note this is a wrapper for [[json_value_rename]]. subroutine json_rename_by_path(json, me, path, name, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path !! path to the variable to rename character(kind=CK,len=*),intent(in) :: name !! the new name logical(LK),intent(out),optional :: found !! if there were no errors type(json_value),pointer :: p if ( json%exception_thrown ) then if ( present(found) ) found = .false. return end if nullify(p) call json%get(me=me, path=path, p=p) if (.not. associated(p)) then call json%throw_exception('Error in json_rename_by_path:'//& ' Unable to resolve path: '//trim(path)) else call json%rename(p,name) nullify(p) end if if (json%exception_thrown) then if (present(found)) then found = .false. call json%clear_exceptions() end if else if (present(found)) found = .true. end if end subroutine json_rename_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_rename_by_path]], where "path" and "name" are kind=CDK subroutine wrap_json_rename_by_path(json, me, path, name, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path character(kind=CDK,len=*),intent(in) :: name logical(LK),intent(out),optional :: found call json%rename(me,to_unicode(path),to_unicode(name),found) end subroutine wrap_json_rename_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_rename_by_path]], where "name" is kind=CDK subroutine json_rename_by_path_name_ascii(json, me, path, name, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path character(kind=CDK,len=*),intent(in) :: name logical(LK),intent(out),optional :: found call json%rename(me,path,to_unicode(name),found) end subroutine json_rename_by_path_name_ascii !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_rename_by_path]], where "path" is kind=CDK subroutine json_rename_by_path_path_ascii(json, me, path, name, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path character(kind=CK,len=*),intent(in) :: name logical(LK),intent(out),optional :: found call json%rename(me,to_unicode(path),name,found) end subroutine json_rename_by_path_path_ascii !***************************************************************************************** !***************************************************************************************** !> ! Returns the [[json_value]] pointer given the path string. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: dat,p ! logical :: found ! !... ! call json%initialize(path_mode=1) ! this is the default so not strictly necessary. ! call json%get(dat,'data(2).version',p,found) !```` ! !### Notes ! The syntax used here is a subset of the ! [http://goessner.net/articles/JsonPath/](JSONPath) "dot–notation". ! The following special characters are used to denote paths: ! ! * `$` - root ! * `@` - this ! * `.` - child object member (note this can be changed using `json%path_separator`) ! * `[]` or `()` - child array element (note that indices are 1-based) ! ! Thus, if any of these characters are present in the name key, ! this routine cannot be used to get the value. ! In that case, the `get_child` methods would need to be used. ! Or, the alternate [[json_get_by_path_rfc6901]] could be used. ! !### See also ! * [[json_get_by_path_rfc6901]] ! * [[json_get_by_path_jsonpath_bracket]] ! !@note The syntax is inherited from FSON, and is basically a subset ! of JSONPath "dot-notation", with the additional allowance of ! () for array elements. ! !@note JSON `null` values are used here for unknown variables when `create_it` is True. ! So, it is possible that an existing null variable can be converted to another ! type (object or array) if a child is specified in the path. Doing it this way ! to avoid having to use another type (say `json_unknown`) that would have to be ! converted to null once all the variables have been created (user would have ! had to do this). ! !@warning See (**) in code. I think we need to protect for memory leaks when ! changing the type of a variable that already exists. subroutine json_get_by_path_default(json,me,path,p,found,create_it,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me !! a JSON linked list character(kind=CK,len=*),intent(in) :: path !! path to the variable type(json_value),pointer,intent(out) :: p !! pointer to the variable !! specify by `path` logical(LK),intent(out),optional :: found !! true if it was found logical(LK),intent(in),optional :: create_it !! if a variable is not present !! in the path, then it is created. !! the leaf node is returned as !! a `null` json type and can be !! changed by the caller. logical(LK),intent(out),optional :: was_created !! if `create_it` is true, this !! will be true if the variable !! was actually created. Otherwise !! it will be false. integer(IK) :: i !! counter of characters in `path` integer(IK) :: length !! significant length of `path` integer(IK) :: child_i !! index for getting children character(kind=CK,len=1) :: c !! a character in the `path` logical(LK) :: array !! flag when searching for array index in `path` type(json_value),pointer :: tmp !! temp variables for getting child objects logical(LK) :: child_found !! if the child value was found logical(LK) :: create !! if the object is to be created logical(LK) :: created !! if `create` is true, then this will be !! true if the leaf object had to be created integer(IK) :: j !! counter of children when creating object nullify(p) if (.not. json%exception_thrown) then if (present(create_it)) then create = create_it else create = .false. end if ! default to assuming relative to me p => me child_i = 1 array = .false. created = .false. !keep trailing space or not: if (json%trailing_spaces_significant) then length = len(path) else length = len_trim(path) end if do i=1, length c = path(i:i) select case (c) case (root) ! root do while (associated (p%parent)) p => p%parent end do child_i = i + 1 if (create) created = .false. ! should always exist case (this) ! this p => me child_i = i + 1 if (create) created = .false. ! should always exist case (start_array,start_array_alt) ! start looking for the array element index array = .true. ! get child member from p if (child_i < i) then nullify(tmp) if (create) then ! Example: ! 'aaa.bbb(1)' ! -> and aaa is a null, need to make it an object ! ! What about the case: aaa.bbb(1)(3) ? ! Is that already handled? if (p%var_type==json_null) then ! (**) ! if p was also created, then we need to ! convert it into an object here: p%var_type = json_object end if ! don't want to throw exceptions in this case call json%get_child(p, path(child_i:i-1), tmp, child_found) if (.not. child_found) then ! have to create this child ! [make it an array] call json_value_create(tmp) call json%to_array(tmp,path(child_i:i-1)) call json%add(p,tmp) created = .true. else created = .false. end if else ! call the normal way call json%get_child(p, path(child_i:i-1), tmp) end if p => tmp else child_i = i + 1 ! say, '@(' cycle end if if (.not. associated(p)) then call json%throw_exception('Error in json_get_by_path_default:'//& ' Error getting array element') exit end if child_i = i + 1 case (end_array,end_array_alt) if (.not. array) then call json%throw_exception('Error in json_get_by_path_default: Unexpected '//c) exit end if array = .false. child_i = json%string_to_int(path(child_i:i-1)) nullify(tmp) if (create) then ! don't want to throw exceptions in this case call json%get_child(p, child_i, tmp, child_found) if (.not. child_found) then if (p%var_type==json_null) then ! (**) ! if p was also created, then we need to ! convert it into an array here: p%var_type = json_array end if ! have to create this element ! [make it a null] ! (and any missing ones before it) do j = 1, child_i nullify(tmp) call json%get_child(p, j, tmp, child_found) if (.not. child_found) then call json_value_create(tmp) call json%to_null(tmp) ! array element doesn't need a name call json%add(p,tmp) if (j==child_i) created = .true. else if (j==child_i) created = .false. end if end do else created = .false. end if else ! call the normal way: call json%get_child(p, child_i, tmp) end if p => tmp child_i = i + 1 case default if (c==json%path_separator) then ! get child member from p if (child_i < i) then nullify(tmp) if (create) then if (p%var_type==json_null) then ! (**) ! if p was also created, then we need to ! convert it into an object here: p%var_type = json_object end if ! don't want to throw exceptions in this case call json%get_child(p, path(child_i:i-1), tmp, child_found) if (.not. child_found) then ! have to create this child ! [make it an object] call json_value_create(tmp) call json%to_object(tmp,path(child_i:i-1)) call json%add(p,tmp) created = .true. else created = .false. end if else ! call the normal way call json%get_child(p, path(child_i:i-1), tmp) end if p => tmp else child_i = i + 1 ! say '$.', '@.', or ').' cycle end if if (.not. associated(p)) then call json%throw_exception('Error in json_get_by_path_default:'//& ' Error getting child member.') exit end if child_i = i + 1 end if end select end do if (json%exception_thrown) then if (present(found)) then nullify(p) ! just in case found = .false. call json%clear_exceptions() end if else ! grab the last child if present in the path if (child_i <= length) then nullify(tmp) if (create) then if (p%var_type==json_null) then ! (**) ! if p was also created, then we need to ! convert it into an object here: p%var_type = json_object end if call json%get_child(p, path(child_i:i-1), tmp, child_found) if (.not. child_found) then ! have to create this child ! (make it a null since it is the leaf) call json_value_create(tmp) call json%to_null(tmp,path(child_i:i-1)) call json%add(p,tmp) created = .true. else created = .false. end if else ! call the normal way call json%get_child(p, path(child_i:i-1), tmp) end if p => tmp else ! we already have p if (create .and. created) then ! make leaf p a null, but only ! if it wasn't there call json%to_null(p) end if end if ! error checking if (associated(p)) then if (present(found)) found = .true. !everything seems to be ok else call json%throw_exception('Error in json_get_by_path_default:'//& ' variable not found: '//trim(path)) if (present(found)) then found = .false. call json%clear_exceptions() end if end if end if ! if it had to be created: if (present(was_created)) was_created = created else if (present(found)) found = .false. if (present(was_created)) was_created = .false. end if end subroutine json_get_by_path_default !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 2/4/2017 ! ! Returns the [[json_value]] pointer given the path string, ! using the "JSON Pointer" path specification defined by RFC 6901. ! ! Note that trailing whitespace significance and case sensitivity ! are user-specified. To fully conform to the RFC 6901 standard, ! should probably set (via `initialize`): ! ! * `case_sensitive_keys = .true.` [this is the default setting] ! * `trailing_spaces_significant = .true.` [this is *not* the default setting] ! * `allow_duplicate_keys = .false.` [this is *not* the default setting] ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: dat,p ! logical :: found ! !... ! call json%initialize(path_mode=2) ! call json%get(dat,'/data/2/version',p,found) !```` ! !### See also ! * [[json_get_by_path_default]] ! * [[json_get_by_path_jsonpath_bracket]] ! !### Reference ! * [JavaScript Object Notation (JSON) Pointer](https://tools.ietf.org/html/rfc6901) ! !@note Not doing anything special about the `-` character to index an array. ! This is considered a normal error. ! !@note Unlike in the default path mode, the array indices here are 0-based ! (in accordance with the RFC 6901 standard) ! !@warning Not checking if the member that is referenced is unique. ! (according to the standard, evaluation of non-unique references ! should fail). Like [[json_get_by_path_default]], this one will just return ! the first instance it encounters. This might be changed in the future. ! !@warning I think the standard indicates that the input paths should use ! escaped JSON strings (currently we are assuming they are not escaped). subroutine json_get_by_path_rfc6901(json, me, path, p, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me !! a JSON linked list character(kind=CK,len=*),intent(in) :: path !! path to the variable !! (an RFC 6901 "JSON Pointer") type(json_value),pointer,intent(out) :: p !! pointer to the variable !! specify by `path` logical(LK),intent(out),optional :: found !! true if it was found character(kind=CK,len=:),allocatable :: token !! a token in the path (between the `/` characters) integer(IK) :: i !! counter integer(IK) :: islash_curr !! location of current '/' character in the path integer(IK) :: islash_next !! location of next '/' character in the path integer(IK) :: ilen !! length of `path` string type(json_value),pointer :: tmp !! temporary variable for traversing the structure integer(IK) :: ival !! integer array index value (0-based) logical(LK) :: status_ok !! error flag logical(LK) :: child_found !! for getting child values nullify(p) if (.not. json%exception_thrown) then p => me ! initialize if (path/=CK_'') then if (path(1:1)==slash) then ! the first character must be a slash islash_curr = 1 ! initialize current slash index !keep trailing space or not: if (json%trailing_spaces_significant) then ilen = len(path) else ilen = len_trim(path) end if do ! get the next token by finding the slashes ! ! 1 2 3 ! /abc/d/efg if (islash_curr==ilen) then !the last token is an empty string token = CK_'' islash_next = 0 ! will signal to stop else ! . ! '/123/567/' ! index in remaining string: islash_next = index(path(islash_curr+1:ilen),slash) if (islash_next<=0) then !last token: token = path(islash_curr+1:ilen) else ! convert to actual index in path: islash_next = islash_curr + index(path(islash_curr+1:ilen),slash) if (islash_next>islash_curr+1) then token = path(islash_curr+1:islash_next-1) else !empty token: token = CK_'' end if end if end if ! remove trailing spaces in the token here if necessary: if (.not. json%trailing_spaces_significant) & token = trim(token) ! decode the token: token = decode_rfc6901(token) ! now, parse the token: ! first see if there is a child with this name call json%get_child(p,token,tmp,child_found) if (child_found) then ! it was found p => tmp else ! No key with this name. ! Is it an integer? If so, ! it might be an array index. status_ok = (len(token)>0) if (status_ok) then do i=1,len(token) ! It must only contain (0..9) characters ! (it must be unsigned) if (scan(token(i:i),CK_'0123456789')<1) then status_ok = .false. exit end if end do if (status_ok) then if (len(token)>1 .and. token(1:1)==CK_'0') then ! leading zeros not allowed for some reason status_ok = .false. end if end if if (status_ok) then ! if we make it this far, it should be ! convertible to an integer, so do it. call string_to_integer(token,ival,status_ok) end if end if if (status_ok) then ! ival is an array index (0-based) call json%get_child(p,ival+1,tmp,child_found) if (child_found) then p => tmp else ! not found status_ok = .false. end if end if if (.not. status_ok) then call json%throw_exception('Error in json_get_by_path_rfc6901: '//& 'invalid path specification: '//trim(path)) exit end if end if if (islash_next<=0) exit ! finished ! set up for next token: islash_curr = islash_next end do else call json%throw_exception('Error in json_get_by_path_rfc6901: '//& 'invalid path specification: '//trim(path)) end if end if if (json%exception_thrown) then nullify(p) if (present(found)) then found = .false. call json%clear_exceptions() end if else if (present(found)) found = .true. end if else if (present(found)) found = .false. end if end subroutine json_get_by_path_rfc6901 !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 9/2/2017 ! ! Returns the [[json_value]] pointer given the path string, ! using the "JSON Pointer" path specification defined by the ! JSONPath "bracket-notation". ! ! The first character `$` is optional, and signifies the root ! of the structure. If it is not present, then the first key ! is taken to be in the `me` object. ! ! Single or double quotes may be used. ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: dat,p ! logical :: found ! !... ! call json%initialize(path_mode=3) ! call json%get(dat,"$['store']['book'][1]['title']",p,found) !```` ! !### See also ! * [[json_get_by_path_default]] ! * [[json_get_by_path_rfc6901]] ! !### Reference ! * [JSONPath](http://goessner.net/articles/JsonPath/) ! !@note Uses 1-based array indices (same as [[json_get_by_path_default]], ! but unlike [[json_get_by_path_rfc6901]] which uses 0-based indices). ! !@note When `create_it=True`, if the variable already exists and is a type ! that is not compatible with the usage in the `path`, then it is ! destroyed and replaced with what is specified in the `path`. Note that ! this applies the all variables in the path as it is created. Currently, ! this behavior is different from [[json_get_by_path_default]]. ! !@note JSON `null` values are used here for unknown variables ! when `create_it` is True. ! !@warning Note that if using single quotes, this routine cannot parse ! a key containing `']`. If using double quotes, this routine ! cannot parse a key containing `"]`. If the key contains both ! `']` and `"]`, there is no way to parse it using this routine. subroutine json_get_by_path_jsonpath_bracket(json,me,path,p,found,create_it,was_created) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me !! a JSON linked list character(kind=CK,len=*),intent(in) :: path !! path to the variable !! (using JSONPath !! "bracket-notation") type(json_value),pointer,intent(out) :: p !! pointer to the variable !! specify by `path` logical(LK),intent(out),optional :: found !! true if it was found logical(LK),intent(in),optional :: create_it !! if a variable is not present !! in the path, then it is created. !! the leaf node is returned as !! a `null` json type and can be !! changed by the caller. logical(LK),intent(out),optional :: was_created !! if `create_it` is true, this !! will be true if the variable !! was actually created. Otherwise !! it will be false. character(kind=CK,len=:),allocatable :: token !! a token in the path !! (between the `['']` or !! `[]` characters) integer(IK) :: istart !! location of current '[' !! character in the path integer(IK) :: iend !! location of current ']' !! character in the path integer(IK) :: ival !! integer array index value logical(LK) :: status_ok !! error flag type(json_value),pointer :: tmp !! temporary variable for !! traversing the structure integer(IK) :: i !! counter integer(IK) :: ilen !! length of `path` string logical(LK) :: double_quotes !! if the keys are enclosed in `"`, !! rather than `'` tokens. logical(LK) :: create !! if the object is to be created logical(LK) :: created !! if `create` is true, then this will be !! true if the leaf object had to be created integer(IK) :: j !! counter of children when creating object !TODO instead of reallocating `token` all the time, just ! allocate a big size and keep track of the length, ! then just reallocate only if necessary. ! [would probably be inefficient if there was a very large token, ! and then a bunch of small ones... but for similarly-sized ones ! it should be way more efficient since it would avoid most ! reallocations.] nullify(p) if (.not. json%exception_thrown) then if (present(create_it)) then create = create_it else create = .false. end if p => me ! initialize created = .false. if (path==CK_'') then call json%throw_exception('Error in json_get_by_path_jsonpath_bracket: '//& 'invalid path specification: '//trim(path)) else if (path(1:1)==root .or. path(1:1)==start_array) then ! the first character must be ! a `$` (root) or a `[` ! (element of `me`) if (path(1:1)==root) then ! go to the root do while (associated (p%parent)) p => p%parent end do if (create) created = .false. ! should always exist end if !path length (don't need trailing spaces:) ilen = len_trim(path) if (ilen>1) then istart = 2 ! initialize first '[' location index do if (istart>ilen) exit ! finished ! must be the next start bracket: if (path(istart:istart) /= start_array) then call json%throw_exception(& 'Error in json_get_by_path_jsonpath_bracket: '//& 'expecting "[", found: "'//trim(path(istart:istart))//& '" in path: '//trim(path)) exit end if ! get the next token by checking: ! ! * [''] -- is the token after istart a quote? ! if so, then search for the next `']` ! ! * [1] -- if not, then maybe it is a number, ! so search for the next `]` ! verify length of remaining string if (istart+2<=ilen) then double_quotes = path(istart+1:istart+1) == quotation_mark ! [" if (double_quotes .or. path(istart+1:istart+1)==single_quote) then ! [' ! it might be a key value: ['abc'] istart = istart + 1 ! move counter to ' index if (double_quotes) then iend = istart + index(path(istart+1:ilen),& quotation_mark//end_array) ! "] else iend = istart + index(path(istart+1:ilen),& single_quote//end_array) ! '] end if if (iend>istart) then ! istart iend ! | | ! ['p']['abcdefg'] if (iend>istart+1) then token = path(istart+1:iend-1) else token = CK_'' ! blank string end if ! remove trailing spaces in ! the token here if necessary: if (.not. json%trailing_spaces_significant) & token = trim(token) if (create) then ! have a token, create it if necessary ! we need to convert it into an object here ! (e.g., if p was also just created) ! and destroy its data to prevent a memory leak call json%convert(p,json_object) ! don't want to throw exceptions in this case call json%get_child(p,token,tmp,status_ok) if (.not. status_ok) then ! have to create this child ! [make it a null since we don't ! know what it is yet] call json_value_create(tmp) call json%to_null(tmp,token) call json%add(p,tmp) status_ok = .true. created = .true. else ! it was already there. created = .false. end if else ! have a token, see if it is valid: call json%get_child(p,token,tmp,status_ok) end if if (status_ok) then ! it was found p => tmp else call json%throw_exception(& 'Error in json_get_by_path_jsonpath_bracket: '//& 'invalid token found: "'//token//& '" in path: '//trim(path)) exit end if iend = iend + 1 ! move counter to ] index else call json%throw_exception(& 'Error in json_get_by_path_jsonpath_bracket: '//& 'invalid path: '//trim(path)) exit end if else ! it might be an integer value: [123] iend = istart + index(path(istart+1:ilen),end_array) ! ] if (iend>istart+1) then ! this should be an integer: token = path(istart+1:iend-1) ! verify that there are no spaces or other ! characters in the string: status_ok = .true. do i=1,len(token) ! It must only contain (0..9) characters ! (it must be unsigned) if (scan(token(i:i),CK_'0123456789')<1) then status_ok = .false. exit end if end do if (status_ok) then call string_to_integer(token,ival,status_ok) if (status_ok) status_ok = ival>0 ! assuming 1-based array indices end if if (status_ok) then ! have a valid integer to use as an index ! see if this element is really there: call json%get_child(p,ival,tmp,status_ok) if (create .and. .not. status_ok) then ! have to create it: if (.not.(p%var_type==json_object .or. p%var_type==json_array)) then ! we need to convert it into an array here ! (e.g., if p was also just created) ! and destroy its data to prevent a memory leak call json%convert(p,json_array) end if ! have to create this element ! [make it a null] ! (and any missing ones before it) do j = 1, ival nullify(tmp) call json%get_child(p, j, tmp, status_ok) if (.not. status_ok) then call json_value_create(tmp) call json%to_null(tmp) ! array element doesn't need a name call json%add(p,tmp) if (j==ival) created = .true. else if (j==ival) created = .false. end if end do status_ok = .true. else created = .false. end if if (status_ok) then ! found it p => tmp else ! not found call json%throw_exception(& 'Error in json_get_by_path_jsonpath_bracket: '//& 'invalid array index found: "'//token//& '" in path: '//trim(path)) exit end if else call json%throw_exception(& 'Error in json_get_by_path_jsonpath_bracket: '//& 'invalid token: "'//token//& '" in path: '//trim(path)) exit end if else call json%throw_exception(& 'Error in json_get_by_path_jsonpath_bracket: '//& 'invalid path: '//trim(path)) exit end if end if else call json%throw_exception(& 'Error in json_get_by_path_jsonpath_bracket: '//& 'invalid path: '//trim(path)) exit end if ! set up for next token: istart = iend + 1 end do end if else call json%throw_exception(& 'Error in json_get_by_path_jsonpath_bracket: '//& 'expecting "'//root//'", found: "'//path(1:1)//& '" in path: '//trim(path)) end if end if if (json%exception_thrown) then nullify(p) if (present(found)) then found = .false. call json%clear_exceptions() end if else if (present(found)) found = .true. end if ! if it had to be created: if (present(was_created)) was_created = created else if (present(found)) found = .false. if (present(was_created)) was_created = .false. end if end subroutine json_get_by_path_jsonpath_bracket !***************************************************************************************** !***************************************************************************************** !> ! Convert an existing JSON variable `p` to a different variable type. ! The existing variable (and its children) is destroyed. It is replaced ! in the structure by a new variable of type `var_type` ! (which can be a `json_null`, `json_object` or `json_array`). ! !@note This is an internal routine used when creating variables by path. subroutine convert(json,p,var_type) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! the variable to convert integer(IK),intent(in) :: var_type !! the variable type to convert `p` to type(json_value),pointer :: tmp !! temporary variable character(kind=CK,len=:),allocatable :: name !! the name of a JSON variable logical :: convert_it !! if `p` needs to be converted convert_it = p%var_type /= var_type if (convert_it) then call json%info(p,name=name) ! get existing name select case (var_type) case(json_object) call json%create_object(tmp,name) case(json_array) call json%create_array(tmp,name) case(json_null) call json%create_null(tmp,name) case default call json%throw_exception('Error in convert: invalid var_type value.') return end select call json%replace(p,tmp,destroy=.true.) p => tmp nullify(tmp) end if end subroutine convert !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_by_path]] where "path" is kind=CDK. subroutine wrap_json_get_by_path(json, me, path, p, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path type(json_value),pointer,intent(out) :: p logical(LK),intent(out),optional :: found call json%get(me, to_unicode(path), p, found) end subroutine wrap_json_get_by_path !***************************************************************************************** !***************************************************************************************** !> ! Returns the path to a JSON object that is part ! of a linked list structure. ! ! The path returned would be suitable for input to ! [[json_get_by_path]] and related routines. ! !@note If an error occurs (which in this case means a malformed ! JSON structure) then an exception will be thrown, unless ! `found` is present, which will be set to `false`. `path` ! will be a blank string. ! !@note If `json%path_mode/=1`, then the `use_alt_array_tokens` ! and `path_sep` inputs are ignored if present. ! !@note [http://goessner.net/articles/JsonPath/](JSONPath) (`path_mode=3`) ! does not specify whether or not the keys should be escaped (this routine ! assumes not, as does http://jsonpath.com). ! Also, we are using Fortran-style 1-based array indices, ! not 0-based, to agree with the assumption in `path_mode=1` subroutine json_get_path(json, p, path, found, use_alt_array_tokens, path_sep) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! a JSON linked list object character(kind=CK,len=:),allocatable,intent(out) :: path !! path to the variable logical(LK),intent(out),optional :: found !! true if there were no problems logical(LK),intent(in),optional :: use_alt_array_tokens !! if true, then '()' are used for array elements !! otherwise, '[]' are used [default] !! (only used if `path_mode=1`) character(kind=CK,len=1),intent(in),optional :: path_sep !! character to use for path separator !! (otherwise use `json%path_separator`) !! (only used if `path_mode=1`) type(json_value),pointer :: tmp !! for traversing the structure type(json_value),pointer :: element !! for traversing the structure integer(IK) :: var_type !! JSON variable type flag character(kind=CK,len=:),allocatable :: name !! variable name character(kind=CK,len=:),allocatable :: parent_name !! variable's parent name character(kind=CK,len=max_integer_str_len) :: istr !! for integer to string conversion !! (array indices) integer(IK) :: i !! counter integer(IK) :: n_children !! number of children for parent logical(LK) :: use_brackets !! to use '[]' characters for arrays logical(LK) :: parent_is_root !! if the parent is the root !optional input: if (present(use_alt_array_tokens)) then use_brackets = .not. use_alt_array_tokens else use_brackets = .true. end if if (associated(p)) then !traverse the structure via parents up to the root tmp => p do if (.not. associated(tmp)) exit !finished !get info about the current variable: call json%info(tmp,name=name) if (json%path_mode==2_IK) then name = encode_rfc6901(name) end if ! if tmp a child of an object, or an element of an array if (associated(tmp%parent)) then !get info about the parent: call json%info(tmp%parent,var_type=var_type,& n_children=n_children,name=parent_name) if (json%path_mode==2_IK) then parent_name = encode_rfc6901(parent_name) end if select case (var_type) case (json_array) !get array index of this element: element => tmp%parent%children do i = 1, n_children if (.not. associated(element)) then call json%throw_exception('Error in json_get_path: '//& 'malformed JSON structure. ') exit end if if (associated(element,tmp)) then exit else element => element%next end if if (i==n_children) then ! it wasn't found (should never happen) call json%throw_exception('Error in json_get_path: '//& 'malformed JSON structure. ') exit end if end do select case(json%path_mode) case(3_IK) ! JSONPath "bracket-notation" ! example: `$['key'][1]` ! [note: this uses 1-based indices] call integer_to_string(i,int_fmt,istr) call add_to_path(start_array//single_quote//parent_name//& single_quote//end_array//& start_array//trim(adjustl(istr))//end_array,CK_'') case(2_IK) ! rfc6901 call integer_to_string(i-1,int_fmt,istr) ! 0-based index call add_to_path(parent_name//slash//trim(adjustl(istr))) case(1_IK) ! default call integer_to_string(i,int_fmt,istr) if (use_brackets) then call add_to_path(parent_name//start_array//& trim(adjustl(istr))//end_array,path_sep) else call add_to_path(parent_name//start_array_alt//& trim(adjustl(istr))//end_array_alt,path_sep) end if end select tmp => tmp%parent ! already added parent name case (json_object) !process parent on the next pass select case(json%path_mode) case(3_IK) call add_to_path(start_array//single_quote//name//& single_quote//end_array,CK_'') case default call add_to_path(name,path_sep) end select case default call json%throw_exception('Error in json_get_path: '//& 'malformed JSON structure. '//& 'A variable that is not an object '//& 'or array should not have a child.') exit end select else !the last one: select case(json%path_mode) case(3_IK) call add_to_path(start_array//single_quote//name//& single_quote//end_array,CK_'') case default call add_to_path(name,path_sep) end select end if if (associated(tmp%parent)) then !check if the parent is the root: parent_is_root = (.not. associated(tmp%parent%parent)) if (parent_is_root) exit end if !go to parent: tmp => tmp%parent end do else call json%throw_exception('Error in json_get_path: '//& 'input pointer is not associated') end if !for errors, return blank string: if (json%exception_thrown .or. .not. allocated(path)) then path = CK_'' else select case (json%path_mode) case(3_IK) ! add the outer level object identifier: path = root//path case(2_IK) ! add the root slash: path = slash//path end select end if !optional output: if (present(found)) then if (json%exception_thrown) then found = .false. call json%clear_exceptions() else found = .true. end if end if contains subroutine add_to_path(str,path_sep) !! prepend the string to the path implicit none character(kind=CK,len=*),intent(in) :: str !! string to prepend to `path` character(kind=CK,len=*),intent(in),optional :: path_sep !! path separator (default is '.'). !! (ignored if `json%path_mode/=1`) select case (json%path_mode) case(3_IK) ! in this case, the options are ignored if (.not. allocated(path)) then path = str else path = str//path end if case(2_IK) ! in this case, the options are ignored if (.not. allocated(path)) then path = str else path = str//slash//path end if case(1_IK) ! default path format if (.not. allocated(path)) then path = str else if (present(path_sep)) then ! use user specified: path = str//path_sep//path else ! use the default: path = str//json%path_separator//path end if end if end select end subroutine add_to_path end subroutine json_get_path !***************************************************************************************** !***************************************************************************************** !> ! Wrapper for [[json_get_path]] where "path" and "path_sep" are kind=CDK. subroutine wrap_json_get_path(json, p, path, found, use_alt_array_tokens, path_sep) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p !! a JSON linked list object character(kind=CDK,len=:),allocatable,intent(out) :: path !! path to the variable logical(LK),intent(out),optional :: found !! true if there were no problems logical(LK),intent(in),optional :: use_alt_array_tokens !! if true, then '()' are used !! for array elements otherwise, !! '[]' are used [default] character(kind=CDK,len=1),intent(in),optional :: path_sep !! character to use for path !! separator (default is '.') character(kind=CK,len=:),allocatable :: ck_path !! path to the variable ! call the main routine: if (present(path_sep)) then call json%get_path(p,ck_path,found,use_alt_array_tokens,to_unicode(path_sep)) else call json%get_path(p,ck_path,found,use_alt_array_tokens) end if ! from unicode: path = ck_path end subroutine wrap_json_get_path !***************************************************************************************** !***************************************************************************************** !> ! Convert a string into an integer. ! !@note Replacement for the `parse_integer` function in the original code. function string_to_int(json,str) result(ival) implicit none class(json_core),intent(inout) :: json character(kind=CK,len=*),intent(in) :: str !! a string integer(IK) :: ival !! `str` converted to an integer logical(LK) :: status_ok !! error flag for [[string_to_integer]] if (.not. json%exception_thrown) then ! call the core routine: call string_to_integer(str,ival,status_ok) if (.not. status_ok) then ival = 0 call json%throw_exception('Error in string_to_int: '//& 'string cannot be converted to an integer: '//& trim(str)) end if else ival = 0 end if end function string_to_int !***************************************************************************************** !***************************************************************************************** !> ! Convert a string into a double. function string_to_dble(json,str) result(rval) implicit none class(json_core),intent(inout) :: json character(kind=CK,len=*),intent(in) :: str !! a string real(RK) :: rval !! `str` converted to a double logical(LK) :: status_ok !! error flag for [[string_to_real]] if (.not. json%exception_thrown) then call string_to_real(str,rval,status_ok) if (.not. status_ok) then !if there was an error rval = 0.0_RK call json%throw_exception('Error in string_to_dble: '//& 'string cannot be converted to a double: '//& trim(str)) end if else rval = 0.0_RK end if end function string_to_dble !***************************************************************************************** !***************************************************************************************** !> ! Get an integer value from a [[json_value]]. subroutine json_get_integer(json, me, value) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me integer(IK),intent(out) :: value !! the integer value logical(LK) :: status_ok !! for [[string_to_integer]] value = 0_IK if ( json%exception_thrown ) return if (me%var_type == json_integer) then value = me%int_value else if (json%strict_type_checking) then call json%throw_exception('Error in json_get_integer:'//& ' Unable to resolve value to integer: '//me%name) else !type conversions select case(me%var_type) case (json_double) value = int(me%dbl_value) case (json_logical) if (me%log_value) then value = 1 else value = 0 end if case (json_string) call string_to_integer(me%str_value,value,status_ok) if (.not. status_ok) then value = 0_IK call json%throw_exception('Error in json_get_integer:'//& ' Unable to convert string value to integer: me.'//& me%name//' = '//trim(me%str_value)) end if case default call json%throw_exception('Error in json_get_integer:'//& ' Unable to resolve value to integer: '//me%name) end select end if end if end subroutine json_get_integer !***************************************************************************************** !***************************************************************************************** !> ! Get an integer value from a [[json_value]], given the path string. subroutine json_get_integer_by_path(json, me, path, value, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path integer(IK),intent(out) :: value logical(LK),intent(out),optional :: found type(json_value),pointer :: p value = 0 if ( json%exception_thrown ) then if ( present(found) ) found = .false. return end if nullify(p) call json%get(me=me, path=path, p=p) if (.not. associated(p)) then call json%throw_exception('Error in json_get_integer_by_path:'//& ' Unable to resolve path: '// trim(path)) else call json%get(p,value) nullify(p) end if if ( json%exception_thrown ) then if ( present(found) ) then found = .false. call json%clear_exceptions() end if else if ( present(found) ) found = .true. end if end subroutine json_get_integer_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_integer_by_path]], where "path" is kind=CDK. subroutine wrap_json_get_integer_by_path(json, me, path, value, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path integer(IK),intent(out) :: value logical(LK),intent(out),optional :: found call json%get(me, to_unicode(path), value, found) end subroutine wrap_json_get_integer_by_path !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 5/14/2014 ! ! Get an integer vector from a [[json_value]]. subroutine json_get_integer_vec(json, me, vec) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me integer(IK),dimension(:),allocatable,intent(out) :: vec logical(LK) :: initialized ! check for 0-length arrays first: select case (me%var_type) case (json_array) if (json%count(me)==0) then allocate(vec(0)) return end if end select initialized = .false. !the callback function is called for each element of the array: call json%get(me, array_callback=get_int_from_array) contains subroutine get_int_from_array(json, element, i, count) !! callback function for integer implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: element integer(IK),intent(in) :: i !! index integer(IK),intent(in) :: count !! size of array !size the output array: if (.not. initialized) then allocate(vec(count)) initialized = .true. end if !populate the elements: call json%get(element, value=vec(i)) end subroutine get_int_from_array end subroutine json_get_integer_vec !***************************************************************************************** !***************************************************************************************** !> ! Get an integer vector from a [[json_value]], given the path string. subroutine json_get_integer_vec_by_path(json, me, path, vec, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path integer(IK),dimension(:),allocatable,intent(out) :: vec logical(LK),intent(out),optional :: found type(json_value),pointer :: p call json%get(me, path, p, found) if (present(found)) then if (.not. found) return else if (json%exception_thrown) return end if call json%get(p, vec) if (present(found) .and. json%exception_thrown) then call json%clear_exceptions() found = .false. end if end subroutine json_get_integer_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_integer_vec_by_path]], where "path" is kind=CDK subroutine wrap_json_get_integer_vec_by_path(json, me, path, vec, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me character(kind=CDK,len=*),intent(in) :: path integer(IK),dimension(:),allocatable,intent(out) :: vec logical(LK),intent(out),optional :: found call json%get(me,path=to_unicode(path),vec=vec,found=found) end subroutine wrap_json_get_integer_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Get a double value from a [[json_value]]. subroutine json_get_double(json, me, value) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me real(RK),intent(out) :: value logical(LK) :: status_ok !! for [[string_to_real]] value = 0.0_RK if ( json%exception_thrown ) return if (me%var_type == json_double) then value = me%dbl_value else if (json%strict_type_checking) then call json%throw_exception('Error in json_get_double:'//& ' Unable to resolve value to double: '//me%name) else !type conversions select case (me%var_type) case (json_integer) value = me%int_value case (json_logical) if (me%log_value) then value = 1.0_RK else value = 0.0_RK end if case (json_string) call string_to_real(me%str_value,value,status_ok) if (.not. status_ok) then value = 0.0_RK call json%throw_exception('Error in json_get_double:'//& ' Unable to convert string value to double: me.'//& me%name//' = '//trim(me%str_value)) end if case default call json%throw_exception('Error in json_get_double:'//& ' Unable to resolve value to double: '//me%name) end select end if end if end subroutine json_get_double !***************************************************************************************** !***************************************************************************************** !> ! Get a double value from a [[json_value]], given the path. subroutine json_get_double_by_path(json, me, path, value, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me character(kind=CK,len=*),intent(in) :: path real(RK),intent(out) :: value logical(LK),intent(out),optional :: found type(json_value),pointer :: p value = 0.0_RK if ( json%exception_thrown ) then if ( present(found) ) found = .false. return end if nullify(p) call json%get(me=me, path=path, p=p) if (.not. associated(p)) then call json%throw_exception('Error in json_get_double_by_path:'//& ' Unable to resolve path: '//trim(path)) else call json%get(p,value) nullify(p) end if if (json%exception_thrown) then if (present(found)) then found = .false. call json%clear_exceptions() end if else if (present(found)) found = .true. end if end subroutine json_get_double_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_double_by_path]], where "path" is kind=CDK subroutine wrap_json_get_double_by_path(json, me, path, value, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me character(kind=CDK,len=*),intent(in) :: path real(RK),intent(out) :: value logical(LK),intent(out),optional :: found call json%get(me,to_unicode(path),value,found) end subroutine wrap_json_get_double_by_path !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 5/14/2014 ! ! Get a double vector from a [[json_value]]. subroutine json_get_double_vec(json, me, vec) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me real(RK),dimension(:),allocatable,intent(out) :: vec logical(LK) :: initialized ! check for 0-length arrays first: select case (me%var_type) case (json_array) if (json%count(me)==0) then allocate(vec(0)) return end if end select initialized = .false. !the callback function is called for each element of the array: call json%get(me, array_callback=get_double_from_array) contains subroutine get_double_from_array(json, element, i, count) !! callback function for double implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: element integer(IK),intent(in) :: i !! index integer(IK),intent(in) :: count !! size of array !size the output array: if (.not. initialized) then allocate(vec(count)) initialized = .true. end if !populate the elements: call json%get(element, value=vec(i)) end subroutine get_double_from_array end subroutine json_get_double_vec !***************************************************************************************** !***************************************************************************************** !> ! Get a double vector from a [[json_value]], given the path. subroutine json_get_double_vec_by_path(json, me, path, vec, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path real(RK),dimension(:),allocatable,intent(out) :: vec logical(LK),intent(out),optional :: found type(json_value),pointer :: p call json%get(me, path, p, found) if (present(found)) then if (.not. found) return else if (json%exception_thrown) return end if call json%get(p, vec) if (present(found) .and. json%exception_thrown) then call json%clear_exceptions() found = .false. end if end subroutine json_get_double_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_double_vec_by_path]], where "path" is kind=CDK subroutine wrap_json_get_double_vec_by_path(json, me, path, vec, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: me character(kind=CDK,len=*),intent(in) :: path real(RK),dimension(:),allocatable,intent(out) :: vec logical(LK),intent(out),optional :: found call json%get(me, to_unicode(path), vec, found) end subroutine wrap_json_get_double_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Get a logical value from a [[json_value]]. ! !### Note ! If `strict_type_checking` is False, then the following assumptions are made: ! ! * For integers: a value > 0 is True ! * For doubles: a value > 0 is True ! * For strings: 'true' is True, and everything else is false. [case sensitive match] subroutine json_get_logical(json, me, value) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me logical(LK),intent(out) :: value value = .false. if ( json%exception_thrown ) return if (me%var_type == json_logical) then value = me%log_value else if (json%strict_type_checking) then call json%throw_exception('Error in json_get_logical: '//& 'Unable to resolve value to logical: '//& me%name) else !type conversions select case (me%var_type) case (json_integer) value = (me%int_value > 0_IK) case (json_double) value = (me%dbl_value > 0.0_RK) case (json_string) value = (me%str_value == true_str) case default call json%throw_exception('Error in json_get_logical: '//& 'Unable to resolve value to logical: '//& me%name) end select end if end if end subroutine json_get_logical !***************************************************************************************** !***************************************************************************************** !> ! Get a logical value from a [[json_value]], given the path. subroutine json_get_logical_by_path(json, me, path, value, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path logical(LK),intent(out) :: value logical(LK),intent(out),optional :: found type(json_value),pointer :: p value = .false. if ( json%exception_thrown) then if ( present(found) ) found = .false. return end if nullify(p) call json%get(me=me, path=path, p=p) if (.not. associated(p)) then call json%throw_exception('Error in json_get_logical_by_path:'//& ' Unable to resolve path: '//trim(path)) else call json%get(p,value) nullify(p) end if if (json%exception_thrown) then if (present(found)) then found = .false. call json%clear_exceptions() end if else if (present(found)) found = .true. end if end subroutine json_get_logical_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_logical_by_path]], where "path" is kind=CDK subroutine wrap_json_get_logical_by_path(json, me, path, value, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path logical(LK),intent(out) :: value logical(LK),intent(out),optional :: found call json%get(me,to_unicode(path),value,found) end subroutine wrap_json_get_logical_by_path !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 5/14/2014 ! ! Get a logical vector from [[json_value]]. subroutine json_get_logical_vec(json, me, vec) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me logical(LK),dimension(:),allocatable,intent(out) :: vec logical(LK) :: initialized ! check for 0-length arrays first: select case (me%var_type) case (json_array) if (json%count(me)==0) then allocate(vec(0)) return end if end select initialized = .false. !the callback function is called for each element of the array: call json%get(me, array_callback=get_logical_from_array) contains subroutine get_logical_from_array(json, element, i, count) !! callback function for logical implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: element integer(IK),intent(in) :: i !! index integer(IK),intent(in) :: count !! size of array !size the output array: if (.not. initialized) then allocate(vec(count)) initialized = .true. end if !populate the elements: call json%get(element, value=vec(i)) end subroutine get_logical_from_array end subroutine json_get_logical_vec !***************************************************************************************** !***************************************************************************************** !> ! Get a logical vector from a [[json_value]], given the path. subroutine json_get_logical_vec_by_path(json, me, path, vec, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path logical(LK),dimension(:),allocatable,intent(out) :: vec logical(LK),intent(out),optional :: found type(json_value),pointer :: p call json%get(me, path, p, found) if (present(found)) then if (.not. found) return else if (json%exception_thrown) return end if call json%get(p, vec) if (present(found) .and. json%exception_thrown) then call json%clear_exceptions() found = .false. end if end subroutine json_get_logical_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_logical_vec_by_path]], where "path" is kind=CDK subroutine wrap_json_get_logical_vec_by_path(json, me, path, vec, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path logical(LK),dimension(:),allocatable,intent(out) :: vec logical(LK),intent(out),optional :: found call json%get(me,to_unicode(path),vec,found) end subroutine wrap_json_get_logical_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Get a character string from a [[json_value]]. subroutine json_get_string(json, me, value) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=:),allocatable,intent(out) :: value value = CK_'' if (.not. json%exception_thrown) then if (me%var_type == json_string) then if (allocated(me%str_value)) then if (json%unescaped_strings) then ! default: it is stored already unescaped: value = me%str_value else ! return the escaped version: call escape_string(me%str_value, value, json%escape_solidus) end if else call json%throw_exception('Error in json_get_string: '//& 'me%str_value not allocated') end if else if (json%strict_type_checking) then call json%throw_exception('Error in json_get_string:'//& ' Unable to resolve value to string: '//me%name) else select case (me%var_type) case (json_integer) if (allocated(me%int_value)) then value = repeat(' ', max_integer_str_len) call integer_to_string(me%int_value,int_fmt,value) value = trim(value) else call json%throw_exception('Error in json_get_string: '//& 'me%int_value not allocated') end if case (json_double) if (allocated(me%dbl_value)) then value = repeat(' ', max_numeric_str_len) call real_to_string(me%dbl_value,json%real_fmt,& json%compact_real,value) value = trim(value) else call json%throw_exception('Error in json_get_string: '//& 'me%int_value not allocated') end if case (json_logical) if (allocated(me%log_value)) then if (me%log_value) then value = true_str else value = false_str end if else call json%throw_exception('Error in json_get_string: '//& 'me%log_value not allocated') end if case (json_null) value = null_str case default call json%throw_exception('Error in json_get_string: '//& 'Unable to resolve value to characters: '//& me%name) end select end if end if end if end subroutine json_get_string !***************************************************************************************** !***************************************************************************************** !> ! Get a character string from a [[json_value]], given the path. subroutine json_get_string_by_path(json, me, path, value, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path character(kind=CK,len=:),allocatable,intent(out) :: value logical(LK),intent(out),optional :: found type(json_value),pointer :: p value = CK_'' if ( json%exception_thrown ) then if ( present(found) ) found = .false. return end if nullify(p) call json%get(me=me, path=path, p=p) if (.not. associated(p)) then call json%throw_exception('Error in json_get_string_by_path:'//& ' Unable to resolve path: '//trim(path)) else call json%get(p,value) nullify(p) end if if (allocated(value) .and. .not. json%exception_thrown) then if (present(found)) found = .true. else if (present(found)) then found = .false. call json%clear_exceptions() end if end if !cleanup: if (associated(p)) nullify(p) end subroutine json_get_string_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_string_by_path]], where "path" is kind=CDK subroutine wrap_json_get_string_by_path(json, me, path, value, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path character(kind=CK,len=:),allocatable,intent(out) :: value logical(LK),intent(out),optional :: found call json%get(me,to_unicode(path),value,found) end subroutine wrap_json_get_string_by_path !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 5/14/2014 ! ! Get a string vector from a [[json_value(type)]]. subroutine json_get_string_vec(json, me, vec) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),dimension(:),allocatable,intent(out) :: vec logical(LK) :: initialized ! check for 0-length arrays first: select case (me%var_type) case (json_array) if (json%count(me)==0) then allocate(vec(0)) return end if end select initialized = .false. !the callback function is called for each element of the array: call json%get(me, array_callback=get_chars_from_array) contains subroutine get_chars_from_array(json, element, i, count) !! callback function for chars implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: element integer(IK),intent(in) :: i !! index integer(IK),intent(in) :: count !! size of array character(kind=CK,len=:),allocatable :: cval !size the output array: if (.not. initialized) then allocate(vec(count)) initialized = .true. end if !populate the elements: call json%get(element, value=cval) if (allocated(cval)) then vec(i) = cval deallocate(cval) else vec(i) = CK_'' end if end subroutine get_chars_from_array end subroutine json_get_string_vec !***************************************************************************************** !***************************************************************************************** !> ! Get a string vector from a [[json_value(type)]], given the path. subroutine json_get_string_vec_by_path(json, me, path, vec, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path character(kind=CK,len=*),dimension(:),allocatable,intent(out) :: vec logical(LK),intent(out),optional :: found type(json_value),pointer :: p call json%get(me, path, p, found) if (present(found)) then if (.not. found) return else if (json%exception_thrown) return end if call json%get(p, vec) if (present(found) .and. json%exception_thrown) then call json%clear_exceptions() found = .false. end if end subroutine json_get_string_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_string_vec_by_path]], where "path" is kind=CDK subroutine wrap_json_get_string_vec_by_path(json, me, path, vec, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path character(kind=CK,len=*),dimension(:),allocatable,intent(out) :: vec logical(LK),intent(out),optional :: found call json%get(me,to_unicode(path),vec,found) end subroutine wrap_json_get_string_vec_by_path !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 12/16/2016 ! ! Get a string vector from a [[json_value(type)]]. This is an alternate ! version of [[json_get_string_vec]]. This one returns an allocatable ! length character (where the string length is the maximum length of ! any element in the array). It also returns an integer array of the ! actual sizes of the strings in the JSON structure. ! !@note This is somewhat inefficient since it does ! cycle through the array twice. ! !@warning The allocation of `vec` doesn't work with ! gfortran 4.9 or 5 due to compiler bugs subroutine json_get_alloc_string_vec(json, me, vec, ilen) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=:),dimension(:),allocatable,intent(out) :: vec integer(IK),dimension(:),allocatable,intent(out) :: ilen !! the actual length !! of each character !! string in the array logical(LK) :: initialized !! if the output array has been sized integer(IK) :: max_len !! the length of the longest string in the array ! check for 0-length arrays first: select case (me%var_type) case (json_array) if (json%count(me)==0) then allocate(character(kind=CK,len=0) :: vec(0)) allocate(ilen(0)) return end if end select initialized = .false. call json%string_info(me,ilen=ilen,max_str_len=max_len) if (.not. json%exception_thrown) then ! now get each string using the callback function: call json%get(me, array_callback=get_chars_from_array) end if contains subroutine get_chars_from_array(json, element, i, count) !! callback function for chars implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: element integer(IK),intent(in) :: i !! index integer(IK),intent(in) :: count !! size of array character(kind=CK,len=:),allocatable :: cval !! for getting string !size the output array: if (.not. initialized) then ! string length long enough to hold the longest one ! Note that this doesn't work with gfortran 4.9 or 5. allocate( character(kind=CK,len=max_len) :: vec(count) ) initialized = .true. end if !populate the elements: call json%get(element, value=cval) if (allocated(cval)) then vec(i) = cval ilen(i) = len(cval) ! return the actual length deallocate(cval) else vec(i) = CK_'' ilen(i) = 0 end if end subroutine get_chars_from_array end subroutine json_get_alloc_string_vec !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_alloc_string_vec]] where input is the path. ! ! This is an alternate version of [[json_get_string_vec_by_path]]. ! This one returns an allocatable length character (where the string ! length is the maximum length of any element in the array). It also ! returns an integer array of the actual sizes of the strings in the ! JSON structure. ! !@note An alternative to using this routine is to use [[json_get_array]] with ! a callback function that gets the string from each element and populates ! a user-defined string type. subroutine json_get_alloc_string_vec_by_path(json, me, path, vec, ilen, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path character(kind=CK,len=:),dimension(:),allocatable,intent(out) :: vec integer(IK),dimension(:),allocatable,intent(out) :: ilen !! the actual length !! of each character !! string in the array logical(LK),intent(out),optional :: found type(json_value),pointer :: p call json%get(me, path, p, found) if (present(found)) then if (.not. found) return else if (json%exception_thrown) return end if call json%get(p, vec, ilen) if (present(found) .and. json%exception_thrown) then call json%clear_exceptions() found = .false. end if end subroutine json_get_alloc_string_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_alloc_string_vec_by_path]], where "path" is kind=CDK subroutine wrap_json_get_alloc_string_vec_by_path(json,me,path,vec,ilen,found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path character(kind=CK,len=:),dimension(:),allocatable,intent(out) :: vec integer(IK),dimension(:),allocatable,intent(out) :: ilen !! the actual length !! of each character !! string in the array logical(LK),intent(out),optional :: found call json%get(me,to_unicode(path),vec,ilen,found) end subroutine wrap_json_get_alloc_string_vec_by_path !***************************************************************************************** !***************************************************************************************** !> ! This routine calls the user-supplied [[json_array_callback_func]] ! subroutine for each element in the array. ! !@note For integer, double, logical, and character arrays, ! higher-level routines are provided (see `get` methods), so ! this routine does not have to be used for those cases. subroutine json_get_array(json, me, array_callback) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me procedure(json_array_callback_func) :: array_callback type(json_value),pointer :: element !! temp variable for getting elements integer(IK) :: i !! counter integer(IK) :: count !! number of elements in the array if ( json%exception_thrown ) return nullify(element) select case (me%var_type) case (json_array) count = json%count(me) element => me%children do i = 1, count ! callback for each child if (.not. associated(element)) then call json%throw_exception('Error in json_get_array: '//& 'Malformed JSON linked list') return end if call array_callback(json, element, i, count) if (json%exception_thrown) exit element => element%next end do case default call json%throw_exception('Error in json_get_array:'//& ' Resolved value is not an array ') end select !cleanup: if (associated(element)) nullify(element) end subroutine json_get_array !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 4/28/2016 ! ! Traverse a JSON structure. ! This routine calls the user-specified [[json_traverse_callback_func]] ! for each element of the structure. subroutine json_traverse(json,p,traverse_callback) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: p procedure(json_traverse_callback_func) :: traverse_callback logical(LK) :: finished !! can be used to stop the process if (.not. json%exception_thrown) call traverse(p) contains recursive subroutine traverse(p) !! recursive [[json_value]] traversal. implicit none type(json_value),pointer,intent(in) :: p type(json_value),pointer :: element !! a child element integer(IK) :: i !! counter integer(IK) :: icount !! number of children if (json%exception_thrown) return call traverse_callback(json,p,finished) ! first call for this object if (finished) return !for arrays and objects, have to also call for all children: if (p%var_type==json_array .or. p%var_type==json_object) then icount = json%count(p) ! number of children if (icount>0) then element => p%children ! first one do i = 1, icount ! call for each child if (.not. associated(element)) then call json%throw_exception('Error in json_traverse: '//& 'Malformed JSON linked list') return end if call traverse(element) if (finished .or. json%exception_thrown) exit element => element%next end do end if nullify(element) end if end subroutine traverse end subroutine json_traverse !***************************************************************************************** !***************************************************************************************** !> ! This routine calls the user-supplied array_callback subroutine ! for each element in the array (specified by the path). subroutine json_get_array_by_path(json, me, path, array_callback, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CK,len=*),intent(in) :: path procedure(json_array_callback_func) :: array_callback logical(LK),intent(out),optional :: found type(json_value),pointer :: p if ( json%exception_thrown ) then if ( present(found) ) found = .false. return end if nullify(p) ! resolve the path to the value call json%get(me=me, path=path, p=p) if (.not. associated(p)) then call json%throw_exception('Error in json_get_array:'//& ' Unable to resolve path: '//trim(path)) else call json%get(me=p,array_callback=array_callback) nullify(p) end if if ( json%exception_thrown ) then if ( present(found) ) then found = .false. call json%clear_exceptions() end if else if ( present(found) ) found = .true. end if end subroutine json_get_array_by_path !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_get_array_by_path]], where "path" is kind=CDK subroutine wrap_json_get_array_by_path(json, me, path, array_callback, found) implicit none class(json_core),intent(inout) :: json type(json_value),pointer,intent(in) :: me character(kind=CDK,len=*),intent(in) :: path procedure(json_array_callback_func) :: array_callback logical(LK),intent(out),optional :: found call json%get(me, to_unicode(path), array_callback, found) end subroutine wrap_json_get_array_by_path !***************************************************************************************** !***************************************************************************************** !> ! Parse the JSON file and populate the [[json_value]] tree. ! !### Inputs ! ! The inputs can be: ! ! * `file` & `unit` : the specified unit is used to read JSON from file. ! [note if unit is already open, then the filename is ignored] ! * `file` : JSON is read from file using internal unit number ! !### Example ! !````fortran ! type(json_core) :: json ! type(json_value),pointer :: p ! call json%parse(file='myfile.json', p=p) !```` ! !### History ! * Jacob Williams : 01/13/2015 : added read from string option. ! * Izaak Beekman : 03/08/2015 : moved read from string to separate ! subroutine, and error annotation to separate subroutine. ! !@note When calling this routine, any exceptions thrown from previous ! calls will automatically be cleared. subroutine json_parse_file(json, file, p, unit) implicit none class(json_core),intent(inout) :: json character(kind=CDK,len=*),intent(in) :: file !! JSON file name type(json_value),pointer :: p !! output structure integer(IK),intent(in),optional :: unit !! file unit number (/= 0) integer(IK) :: iunit !! file unit actually used integer(IK) :: istat !! iostat flag logical(LK) :: is_open !! if the file is already open logical(LK) :: has_duplicate !! if checking for duplicate keys character(kind=CK,len=:),allocatable :: path !! path to any duplicate key !clear any exceptions and initialize: call json%initialize() if ( present(unit) ) then if (unit==0) then call json%throw_exception('Error in json_parse_file: unit number must not be 0.') return end if iunit = unit !check to see if the file is already open ! if it is, then use it, otherwise open the file with the name given. inquire(unit=iunit, opened=is_open, iostat=istat) if (istat==0 .and. .not. is_open) then ! open the file open ( unit = iunit, & file = file, & status = 'OLD', & action = 'READ', & form = form_spec, & access = access_spec, & iostat = istat & FILE_ENCODING ) else !if the file is already open, then we need to make sure ! that it is open with the correct form/access/etc... end if else ! open the file with a new unit number: open ( newunit = iunit, & file = file, & status = 'OLD', & action = 'READ', & form = form_spec, & access = access_spec, & iostat = istat & FILE_ENCODING ) end if if (istat==0) then ! create the value and associate the pointer call json_value_create(p) ! Note: the name of the root json_value doesn't really matter, ! but we'll allocate something here just in case. p%name = trim(file) !use the file name ! parse as a value call json%parse_value(unit=iunit, str=CK_'', value=p) ! check for errors: if (json%exception_thrown) then call json%annotate_invalid_json(iunit,CK_'') else if (.not. json%allow_duplicate_keys) then call json%check_for_duplicate_keys(p,has_duplicate,path=path) if (.not. json%exception_thrown) then if (has_duplicate) then call json%throw_exception('Error in json_parse_file: '//& 'Duplicate key found: '//path) end if end if end if end if ! close the file: close(unit=iunit, iostat=istat) else call json%throw_exception('Error in json_parse_file: Error opening file: '//trim(file)) nullify(p) end if end subroutine json_parse_file !***************************************************************************************** !***************************************************************************************** !> ! Parse the JSON string and populate the [[json_value]] tree. ! !### See also ! * [[json_parse_file]] subroutine json_parse_string(json, p, str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! output structure character(kind=CK,len=*),intent(in) :: str !! string with JSON data integer(IK),parameter :: iunit = 0 !! indicates that json data will be read from buffer logical(LK) :: has_duplicate !! if checking for duplicate keys character(kind=CK,len=:),allocatable :: path !! path to any duplicate key !clear any exceptions and initialize: call json%initialize() ! create the value and associate the pointer call json_value_create(p) ! Note: the name of the root json_value doesn't really matter, ! but we'll allocate something here just in case. p%name = CK_'' ! parse as a value call json%parse_value(unit=iunit, str=str, value=p) if (json%exception_thrown) then call json%annotate_invalid_json(iunit,str) else if (.not. json%allow_duplicate_keys) then call json%check_for_duplicate_keys(p,has_duplicate,path=path) if (.not. json%exception_thrown) then if (has_duplicate) then call json%throw_exception('Error in json_parse_string: '//& 'Duplicate key found: '//path) end if end if end if end if end subroutine json_parse_string !***************************************************************************************** !***************************************************************************************** !> ! Alternate version of [[json_parse_string]], where `str` is kind=CDK. subroutine wrap_json_parse_string(json, p, str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p !! output structure character(kind=CDK,len=*),intent(in) :: str !! string with JSON data call json%parse(p,to_unicode(str)) end subroutine wrap_json_parse_string !***************************************************************************************** !***************************************************************************************** !> ! Generate a warning message if there was an error parsing a JSON ! file or string. subroutine annotate_invalid_json(json,iunit,str) implicit none class(json_core),intent(inout) :: json integer(IK),intent(in) :: iunit !! file unit number character(kind=CK,len=*),intent(in) :: str !! string with JSON data character(kind=CK,len=:),allocatable :: line !! line containing the error character(kind=CK,len=:),allocatable :: arrow_str !! arrow string that points !! to the current character character(kind=CK,len=max_integer_str_len) :: line_str !! current line number string character(kind=CK,len=max_integer_str_len) :: char_str !! current character count string integer(IK) :: i !! line number counter integer(IK) :: i_nl_prev !! index of previous newline character integer(IK) :: i_nl !! index of current newline character ! If there was an error reading the file, then ! print the line where the error occurred: if (json%exception_thrown) then !the counters for the current line and the last character read: call integer_to_string(json%line_count, int_fmt, line_str) call integer_to_string(json%char_count, int_fmt, char_str) !draw the arrow string that points to the current character: arrow_str = repeat('-',max( 0, json%char_count - 1) )//'^' if (json%line_count>0 .and. json%char_count>0) then if (iunit/=0) then if (use_unformatted_stream) then call json%get_current_line_from_file_stream(iunit,line) else call json%get_current_line_from_file_sequential(iunit,line) end if else !get the current line from the string: ! [this is done by counting the newline characters] i_nl_prev = 0 !index of previous newline character i_nl = 2 !just in case line_count = 0 do i=1,json%line_count i_nl = index(str(i_nl_prev+1:),newline) if (i_nl==0) then !last line - no newline character i_nl = len(str)+1 exit end if i_nl = i_nl + i_nl_prev !index of current newline character i_nl_prev = i_nl !update for next iteration end do line = str(i_nl_prev+1 : i_nl-1) !extract current line end if else !in this case, it was an empty line or file line = CK_'' end if ! add a newline for the error display if necessary: line = trim(line) if (len(line)>0) then i = len(line) if (line(i:i)/=newline) line = line//newline else line = line//newline end if !create the error message: if (allocated(json%err_message)) then json%err_message = json%err_message//newline else json%err_message = '' end if json%err_message = json%err_message//& 'line: '//trim(adjustl(line_str))//', '//& 'character: '//trim(adjustl(char_str))//newline//& line//arrow_str if (allocated(line)) deallocate(line) end if end subroutine annotate_invalid_json !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Rewind the file to the beginning of the current line, and return this line. ! The file is assumed to be opened. ! This is the SEQUENTIAL version (see also [[get_current_line_from_file_stream]]). subroutine get_current_line_from_file_sequential(iunit,line) implicit none integer(IK),intent(in) :: iunit !! file unit number character(kind=CK,len=:),allocatable,intent(out) :: line !! current line character(kind=CK,len=seq_chunk_size) :: chunk !! for reading line in chunks integer(IK) :: istat !! iostat flag integer(IK) :: isize !! number of characters read in read statement !initialize: line = CK_'' !rewind to beginning of the current record: backspace(iunit, iostat=istat) !loop to read in all the characters in the current record. ![the line is read in chunks until the end of the line is reached] if (istat==0) then do isize = 0 read(iunit,fmt='(A)',advance='NO',size=isize,iostat=istat) chunk if (istat==0) then line = line//chunk else if (isize>0 .and. isize<=seq_chunk_size) line = line//chunk(1:isize) exit end if end do end if end subroutine get_current_line_from_file_sequential !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Rewind the file to the beginning of the current line, and return this line. ! The file is assumed to be opened. ! This is the STREAM version (see also [[get_current_line_from_file_sequential]]). subroutine get_current_line_from_file_stream(json,iunit,line) implicit none class(json_core),intent(inout) :: json integer(IK),intent(in) :: iunit !! file unit number character(kind=CK,len=:),allocatable,intent(out) :: line !! current line integer(IK) :: istart !! start position of current line integer(IK) :: iend !! end position of current line integer(IK) :: ios !! file read `iostat` code character(kind=CK,len=1) :: c !! a character read from the file istart = json%ipos do if (istart<=1) then istart = 1 exit end if read(iunit,pos=istart,iostat=ios) c if (c==newline .or. ios/=0) then if (istart/=1) istart = istart - 1 exit end if istart = istart-1 !rewind until the beginning of the line end do iend = json%ipos do read(iunit,pos=iend,iostat=ios) c if (IS_IOSTAT_END(ios)) then ! account for end of file without linebreak iend=iend-1 exit end if if (c==newline .or. ios/=0) exit iend=iend+1 end do allocate( character(kind=CK,len=iend-istart+1) :: line ) read(iunit,pos=istart,iostat=ios) line end subroutine get_current_line_from_file_stream !***************************************************************************************** !***************************************************************************************** !> ! Core parsing routine. recursive subroutine parse_value(json, unit, str, value) implicit none class(json_core),intent(inout) :: json integer(IK),intent(in) :: unit !! file unit number character(kind=CK,len=*),intent(in) :: str !! string containing JSON !! data (only used if `unit=0`) type(json_value),pointer :: value !! JSON data that is extracted logical(LK) :: eof !! end-of-file flag character(kind=CK,len=1) :: c !! character read from file !! (or string) by [[pop_char]] #if defined __GFORTRAN__ character(kind=CK,len=:),allocatable :: tmp !! this is a work-around for a bug !! in the gfortran 4.9 compiler. #endif if (.not. json%exception_thrown) then !the routine is being called incorrectly. if (.not. associated(value)) then call json%throw_exception('Error in parse_value: value pointer not associated.') end if ! pop the next non whitespace character off the file call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., & skip_comments=json%allow_comments, popped=c) if (eof) then return else select case (c) case (start_object) ! start object call json%to_object(value) !allocate class call json%parse_object(unit, str, value) case (start_array) ! start array call json%to_array(value) !allocate class call json%parse_array(unit, str, value) case (end_array) ! end an empty array call json%push_char(c) nullify(value) case (quotation_mark) ! string call json%to_string(value) !allocate class select case (value%var_type) case (json_string) #if defined __GFORTRAN__ ! write to a tmp variable because of ! a bug in 4.9 gfortran compiler. call json%parse_string(unit,str,tmp) value%str_value = tmp if (allocated(tmp)) deallocate(tmp) #else call json%parse_string(unit,str,value%str_value) #endif end select case (CK_'t') !true_str(1:1) gfortran bug work around !true call json%parse_for_chars(unit, str, true_str(2:)) !allocate class and set value: if (.not. json%exception_thrown) call json%to_logical(value,.true.) case (CK_'f') !false_str(1:1) gfortran bug work around !false call json%parse_for_chars(unit, str, false_str(2:)) !allocate class and set value: if (.not. json%exception_thrown) call json%to_logical(value,.false.) case (CK_'n') !null_str(1:1) gfortran bug work around !null call json%parse_for_chars(unit, str, null_str(2:)) if (.not. json%exception_thrown) call json%to_null(value) ! allocate class case(CK_'-', CK_'0': CK_'9') call json%push_char(c) call json%parse_number(unit, str, value) case default call json%throw_exception('Error in parse_value:'//& ' Unexpected character while parsing value. "'//& c//'"') end select end if end if end subroutine parse_value !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Allocate a [[json_value]] pointer and make it a logical(LK) variable. ! The pointer should not already be allocated. ! !### Example !````fortran ! type(json_value),pointer :: p ! type(json_core) :: json ! call json%create_logical(p,'value',.true.) !```` subroutine json_value_create_logical(json,p,val,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p logical(LK),intent(in) :: val !! variable value character(kind=CK,len=*),intent(in) :: name !! variable name call json_value_create(p) call json%to_logical(p,val,name) end subroutine json_value_create_logical !***************************************************************************************** !***************************************************************************************** !> author: Izaak Beekman ! ! Wrapper for [[json_value_create_logical]] so `create_logical` method can ! be called with name of character kind 'DEFAULT' or 'ISO_10646' subroutine wrap_json_value_create_logical(json,p,val,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p logical(LK),intent(in) :: val character(kind=CDK,len=*),intent(in) :: name call json%create_logical(p,val,to_unicode(name)) end subroutine wrap_json_value_create_logical !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Allocate a [[json_value]] pointer and make it an integer(IK) variable. ! The pointer should not already be allocated. ! !### Example !````fortran ! type(json_value),pointer :: p ! type(json_core) :: json ! call json%create_integer(p,'value',1) !```` subroutine json_value_create_integer(json,p,val,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p integer(IK),intent(in) :: val character(kind=CK,len=*),intent(in) :: name call json_value_create(p) call json%to_integer(p,val,name) end subroutine json_value_create_integer !***************************************************************************************** !***************************************************************************************** !> author: Izaak Beekman ! ! A wrapper procedure for [[json_value_create_integer]] so that `create_integer` ! method may be called with either a 'DEFAULT' or 'ISO_10646' character kind ! `name` actual argument. subroutine wrap_json_value_create_integer(json,p,val,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p integer(IK),intent(in) :: val character(kind=CDK,len=*),intent(in) :: name call json%create_integer(p,val,to_unicode(name)) end subroutine wrap_json_value_create_integer !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Allocate a [[json_value]] pointer and make it a real(RK) variable. ! The pointer should not already be allocated. ! !### Example !````fortran ! type(json_value),pointer :: p ! type(json_core) :: json ! call json%create_double(p,'value',1.0_RK) !```` subroutine json_value_create_double(json,p,val,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p real(RK),intent(in) :: val character(kind=CK,len=*),intent(in) :: name call json_value_create(p) call json%to_double(p,val,name) end subroutine json_value_create_double !***************************************************************************************** !***************************************************************************************** !> author: Izaak Beekman ! ! A wrapper for [[json_value_create_double]] so that `create_double` method ! may be called with an actual argument corresponding to the dummy argument, ! `name` that may be of 'DEFAULT' or 'ISO_10646' character kind. subroutine wrap_json_value_create_double(json,p,val,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p real(RK),intent(in) :: val character(kind=CDK,len=*),intent(in) :: name call json%create_double(p,val,to_unicode(name)) end subroutine wrap_json_value_create_double !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Allocate a json_value pointer and make it a string variable. ! The pointer should not already be allocated. ! !### Example !````fortran ! type(json_value),pointer :: p ! type(json_core) :: json ! call json%create_string(p,'value','hello') !```` subroutine json_value_create_string(json,p,val,name,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: val character(kind=CK,len=*),intent(in) :: name logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` call json_value_create(p) call json%to_string(p,val,name,trim_str,adjustl_str) end subroutine json_value_create_string !***************************************************************************************** !***************************************************************************************** !> author: Izaak Beekman ! ! Wrap [[json_value_create_string]] so that `create_string` method may be called ! with actual character string arguments for `name` and `val` that are BOTH of ! 'DEFAULT' or 'ISO_10646' character kind. subroutine wrap_json_value_create_string(json,p,val,name,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: val character(kind=CDK,len=*),intent(in) :: name logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` call json%create_string(p,to_unicode(val),to_unicode(name),trim_str,adjustl_str) end subroutine wrap_json_value_create_string !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Allocate a json_value pointer and make it a null variable. ! The pointer should not already be allocated. ! !### Example !````fortran ! type(json_value),pointer :: p ! type(json_core) :: json ! call json%create_null(p,'value') !```` subroutine json_value_create_null(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name call json_value_create(p) call json%to_null(p,name) end subroutine json_value_create_null !***************************************************************************************** !***************************************************************************************** !> author: Izaak Beekman ! ! Wrap [[json_value_create_null]] so that `create_null` method may be called with ! an actual argument corresponding to the dummy argument `name` that is either ! of 'DEFAULT' or 'ISO_10646' character kind. subroutine wrap_json_value_create_null(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name call json%create_null(p,to_unicode(name)) end subroutine wrap_json_value_create_null !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Allocate a [[json_value]] pointer and make it an object variable. ! The pointer should not already be allocated. ! !### Example !````fortran ! type(json_value),pointer :: p ! type(json_core) :: json ! call json%create_object(p,'objectname') !```` ! !@note The name is not significant for the root structure or an array element. ! In those cases, an empty string can be used. subroutine json_value_create_object(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name call json_value_create(p) call json%to_object(p,name) end subroutine json_value_create_object !***************************************************************************************** !***************************************************************************************** !> author: Izaak Beekman ! ! Wrap [[json_value_create_object]] so that `create_object` method may be called ! with an actual argument corresponding to the dummy argument `name` that is of ! either 'DEFAULT' or 'ISO_10646' character kind. subroutine wrap_json_value_create_object(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name call json%create_object(p,to_unicode(name)) end subroutine wrap_json_value_create_object !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Allocate a [[json_value]] pointer and make it an array variable. ! The pointer should not already be allocated. ! !### Example !````fortran ! type(json_value),pointer :: p ! type(json_core) :: json ! call json%create_array(p,'arrayname') !```` subroutine json_value_create_array(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in) :: name call json_value_create(p) call json%to_array(p,name) end subroutine json_value_create_array !***************************************************************************************** !***************************************************************************************** !> author: Izaak Beekman ! ! A wrapper for [[json_value_create_array]] so that `create_array` method may be ! called with an actual argument, corresponding to the dummy argument `name`, ! that is either of 'DEFAULT' or 'ISO_10646' character kind. subroutine wrap_json_value_create_array(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CDK,len=*),intent(in) :: name call json%create_array(p,to_unicode(name)) end subroutine wrap_json_value_create_array !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Change the [[json_value]] variable to a logical. subroutine to_logical(json,p,val,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p logical(LK),intent(in),optional :: val !! if the value is also to be set !! (if not present, then .false. is used). character(kind=CK,len=*),intent(in),optional :: name !! if the name is also to be changed. !set type and value: call destroy_json_data(p) p%var_type = json_logical allocate(p%log_value) if (present(val)) then p%log_value = val else p%log_value = .false. !default value end if !name: if (present(name)) call json%rename(p,name) end subroutine to_logical !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Change the [[json_value]] variable to an integer. subroutine to_integer(json,p,val,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p integer(IK),intent(in),optional :: val !! if the value is also to be set !! (if not present, then 0 is used). character(kind=CK,len=*),intent(in),optional :: name !! if the name is also to be changed. !set type and value: call destroy_json_data(p) p%var_type = json_integer allocate(p%int_value) if (present(val)) then p%int_value = val else p%int_value = 0_IK !default value end if !name: if (present(name)) call json%rename(p,name) end subroutine to_integer !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Change the [[json_value]] variable to a double. subroutine to_double(json,p,val,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p real(RK),intent(in),optional :: val !! if the value is also to be set !! (if not present, then 0.0_rk is used). character(kind=CK,len=*),intent(in),optional :: name !! if the name is also to be changed. !set type and value: call destroy_json_data(p) p%var_type = json_double allocate(p%dbl_value) if (present(val)) then p%dbl_value = val else p%dbl_value = 0.0_RK !default value end if !name: if (present(name)) call json%rename(p,name) end subroutine to_double !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Change the [[json_value]] variable to a string. ! !### Modified ! * Izaak Beekman : 02/24/2015 subroutine to_string(json,p,val,name,trim_str,adjustl_str) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in),optional :: val !! if the value is also to be set !! (if not present, then '' is used). character(kind=CK,len=*),intent(in),optional :: name !! if the name is also to be changed. logical(LK),intent(in),optional :: trim_str !! if TRIM() should be called for the `val` !! (only used if `val` is present) logical(LK),intent(in),optional :: adjustl_str !! if ADJUSTL() should be called for the `val` !! (only used if `val` is present) !! (note that ADJUSTL is done before TRIM) character(kind=CK,len=:),allocatable :: str !! temp string for `trim()` and/or `adjustl()` logical :: trim_string !! if the string is to be trimmed logical :: adjustl_string !! if the string is to be adjusted left !set type and value: call destroy_json_data(p) p%var_type = json_string if (present(val)) then if (present(trim_str)) then trim_string = trim_str else trim_string = .false. end if if (present(adjustl_str)) then adjustl_string = adjustl_str else adjustl_string = .false. end if if (trim_string .or. adjustl_string) then str = val if (adjustl_string) str = adjustl(str) if (trim_string) str = trim(str) p%str_value = str else p%str_value = val end if else p%str_value = CK_'' ! default value end if !name: if (present(name)) call json%rename(p,name) end subroutine to_string !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Change the [[json_value]] variable to a null. subroutine to_null(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in),optional :: name !! if the name is also to be changed. !set type and value: call destroy_json_data(p) p%var_type = json_null !name: if (present(name)) call json%rename(p,name) end subroutine to_null !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Change the [[json_value]] variable to an object. subroutine to_object(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in),optional :: name !! if the name is also to be changed. !set type and value: call destroy_json_data(p) p%var_type = json_object !name: if (present(name)) call json%rename(p,name) end subroutine to_object !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Change the [[json_value]] variable to an array. subroutine to_array(json,p,name) implicit none class(json_core),intent(inout) :: json type(json_value),pointer :: p character(kind=CK,len=*),intent(in),optional :: name !! if the name is also to be changed. !set type and value: call destroy_json_data(p) p%var_type = json_array !name: if (present(name)) call json%rename(p,name) end subroutine to_array !***************************************************************************************** !***************************************************************************************** !> ! Core parsing routine. recursive subroutine parse_object(json, unit, str, parent) implicit none class(json_core),intent(inout) :: json integer(IK),intent(in) :: unit !! file unit number (if parsing from a file) character(kind=CK,len=*),intent(in) :: str !! JSON string (if parsing from a string) type(json_value),pointer :: parent !! the parsed object will be added as a child of this type(json_value),pointer :: pair !! temp variable logical(LK) :: eof !! end of file flag character(kind=CK,len=1) :: c !! character returned by [[pop_char]] #if defined __GFORTRAN__ character(kind=CK,len=:),allocatable :: tmp !! this is a work-around for a bug !! in the gfortran 4.9 compiler. #endif if (.not. json%exception_thrown) then !the routine is being called incorrectly. if (.not. associated(parent)) then call json%throw_exception('Error in parse_object: parent pointer not associated.') end if nullify(pair) !probably not necessary ! pair name call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., & skip_comments=json%allow_comments, popped=c) if (eof) then call json%throw_exception('Error in parse_object:'//& ' Unexpected end of file while parsing start of object.') return else if (end_object == c) then ! end of an empty object return else if (quotation_mark == c) then call json_value_create(pair) #if defined __GFORTRAN__ call json%parse_string(unit,str,tmp) ! write to a tmp variable because of pair%name = tmp ! a bug in 4.9 gfortran compiler. deallocate(tmp) #else call json%parse_string(unit,str,pair%name) #endif if (json%exception_thrown) then call json%destroy(pair) return end if else call json%throw_exception('Error in parse_object: Expecting string: "'//c//'"') return end if ! pair value call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., & skip_comments=json%allow_comments, popped=c) if (eof) then call json%throw_exception('Error in parse_object:'//& ' Unexpected end of file while parsing object member.') return else if (colon_char == c) then ! parse the value call json%parse_value(unit, str, pair) if (json%exception_thrown) then call json%destroy(pair) return else call json%add(parent, pair) end if else call json%throw_exception('Error in parse_object:'//& ' Expecting : and then a value: '//c) return end if ! another possible pair call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., & skip_comments=json%allow_comments, popped=c) if (eof) then call json%throw_exception('Error in parse_object: '//& 'End of file encountered when parsing an object') return else if (delimiter == c) then ! read the next member call json%parse_object(unit = unit, str=str, parent = parent) else if (end_object == c) then ! end of object return else call json%throw_exception('Error in parse_object: Expecting end of object: '//c) return end if end if end subroutine parse_object !***************************************************************************************** !***************************************************************************************** !> ! Core parsing routine. recursive subroutine parse_array(json, unit, str, array) implicit none class(json_core),intent(inout) :: json integer(IK),intent(in) :: unit !! file unit number (if parsing from a file) character(kind=CK,len=*),intent(in) :: str !! JSON string (if parsing from a string) type(json_value),pointer :: array type(json_value),pointer :: element !! temp variable for array element logical(LK) :: eof !! end of file flag character(kind=CK,len=1) :: c !! character returned by [[pop_char]] do if (json%exception_thrown) exit ! try to parse an element value nullify(element) call json_value_create(element) call json%parse_value(unit, str, element) if (json%exception_thrown) then if (associated(element)) call json%destroy(element) exit end if ! parse value will disassociate an empty array value if (associated(element)) call json%add(array, element) ! popped the next character call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., & skip_comments=json%allow_comments, popped=c) if (eof) then ! The file ended before array was finished: call json%throw_exception('Error in parse_array: '//& 'End of file encountered when parsing an array.') exit else if (delimiter == c) then ! parse the next element cycle else if (end_array == c) then ! end of array exit else call json%throw_exception('Error in parse_array: '//& 'Unexpected character encountered when parsing array.') exit end if end do end subroutine parse_array !***************************************************************************************** !***************************************************************************************** !> ! Parses a string while reading a JSON file. ! !### History ! * Jacob Williams : 6/16/2014 : Added hex validation. ! * Jacob Williams : 12/3/2015 : Fixed some bugs. ! * Jacob Williams : 8/23/2015 : `string` is now returned unescaped. ! * Jacob Williams : 7/21/2018 : moved hex validate to [[unescape_string]]. subroutine parse_string(json, unit, str, string) implicit none class(json_core),intent(inout) :: json integer(IK),intent(in) :: unit !! file unit number (if !! parsing from a file) character(kind=CK,len=*),intent(in) :: str !! JSON string (if parsing !! from a string) character(kind=CK,len=:),allocatable,intent(out) :: string !! the string (unescaped !! if necessary) logical(LK) :: eof !! end of file flag logical(LK) :: escape !! for escape string parsing character(kind=CK,len=1) :: c !! character returned by [[pop_char]] integer(IK) :: ip !! index to put next character, !! to speed up by reducing the number !! of character string reallocations. character(kind=CK,len=:),allocatable :: error_message !! for string unescaping !at least return a blank string if there is a problem: string = repeat(space, chunk_size) if (.not. json%exception_thrown) then !initialize: escape = .false. ip = 1 do !get the next character from the file: call json%pop_char(unit, str=str, eof=eof, skip_ws=.false., popped=c) if (eof) then call json%throw_exception('Error in parse_string: Expecting end of string') return else if (c==quotation_mark .and. .not. escape) then !end of string exit else !if the string is not big enough, then add another chunk: if (ip>len(string)) string = string // repeat(space, chunk_size) !append to string: string(ip:ip) = c ip = ip + 1 ! check for escape character, so we don't ! exit prematurely if escaping a quotation ! character: if (escape) then escape = .false. else escape = (c==backslash) end if end if end do !trim the string if necessary: if (ip<len(string)+1) then if (ip==1) then string = CK_'' else string = string(1:ip-1) end if end if ! string is returned unescaped: ! (this will also validate any hex strings present) call unescape_string(string,error_message) if (allocated(error_message)) then call json%throw_exception(error_message) deallocate(error_message) !cleanup end if end if end subroutine parse_string !***************************************************************************************** !***************************************************************************************** !> ! Core parsing routine. ! ! This is used to verify the strings `true`, `false`, and `null` during parsing. subroutine parse_for_chars(json, unit, str, chars) implicit none class(json_core),intent(inout) :: json integer(IK),intent(in) :: unit !! file unit number (if parsing from a file) character(kind=CK,len=*),intent(in) :: str !! JSON string (if parsing from a string) character(kind=CK,len=*),intent(in) :: chars !! the string to check for. integer(IK) :: i !! counter integer(IK) :: length !! trimmed length of `chars` logical(LK) :: eof !! end of file flag character(kind=CK,len=1) :: c !! character returned by [[pop_char]] if (.not. json%exception_thrown) then length = len_trim(chars) do i = 1, length call json%pop_char(unit, str=str, eof=eof, skip_ws=.false., popped=c) if (eof) then call json%throw_exception('Error in parse_for_chars:'//& ' Unexpected end of file while parsing.') return else if (c /= chars(i:i)) then call json%throw_exception('Error in parse_for_chars:'//& ' Unexpected character: "'//c//'" (expecting "'//& chars(i:i)//'")') return end if end do end if end subroutine parse_for_chars !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! date: 1/20/2014 ! ! Read a numerical value from the file (or string). ! The routine will determine if it is an integer or a double, and ! allocate the type accordingly. ! !@note Complete rewrite of the original FSON routine, which had some problems. subroutine parse_number(json, unit, str, value) implicit none class(json_core),intent(inout) :: json integer(IK),intent(in) :: unit !! file unit number (if parsing from a file) character(kind=CK,len=*),intent(in) :: str !! JSON string (if parsing from a string) type(json_value),pointer :: value character(kind=CK,len=:),allocatable :: tmp !! temp string character(kind=CK,len=1) :: c !! character returned by [[pop_char]] logical(LK) :: eof !! end of file flag real(RK) :: rval !! real value integer(IK) :: ival !! integer value logical(LK) :: first !! first character logical(LK) :: is_integer !! it is an integer integer(IK) :: ip !! index to put next character !! [to speed up by reducing the number !! of character string reallocations] if (.not. json%exception_thrown) then tmp = repeat(space, chunk_size) ip = 1 first = .true. is_integer = .true. !assume it may be an integer, unless otherwise determined !read one character at a time and accumulate the string: do !get the next character: call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., popped=c) if (eof) then call json%throw_exception('Error in parse_number:'//& ' Unexpected end of file while parsing number.') return else select case (c) case(CK_'-',CK_'+') !note: allowing a '+' as the first character here. if (is_integer .and. (.not. first)) is_integer = .false. !add it to the string: !tmp = tmp // c !...original if (ip>len(tmp)) tmp = tmp // repeat(space, chunk_size) tmp(ip:ip) = c ip = ip + 1 case(CK_'.',CK_'E',CK_'e') !can be present in real numbers if (is_integer) is_integer = .false. !add it to the string: !tmp = tmp // c !...original if (ip>len(tmp)) tmp = tmp // repeat(space, chunk_size) tmp(ip:ip) = c ip = ip + 1 case(CK_'0':CK_'9') !valid characters for numbers !add it to the string: !tmp = tmp // c !...original if (ip>len(tmp)) tmp = tmp // repeat(space, chunk_size) tmp(ip:ip) = c ip = ip + 1 case default !push back the last character read: call json%push_char(c) !string to value: if (is_integer) then ival = json%string_to_int(tmp) call json%to_integer(value,ival) else rval = json%string_to_dble(tmp) call json%to_double(value,rval) end if exit !finished end select end if if (first) first = .false. end do !cleanup: if (allocated(tmp)) deallocate(tmp) end if end subroutine parse_number !***************************************************************************************** !***************************************************************************************** !> ! Get the next character from the file (or string). ! !### See also ! * [[push_char]] ! !@note This routine ignores non-printing ASCII characters ! (`iachar<=31`) that are in strings. recursive subroutine pop_char(json,unit,str,skip_ws,skip_comments,eof,popped) implicit none class(json_core),intent(inout) :: json integer(IK),intent(in) :: unit !! file unit number (if parsing !! from a file) character(kind=CK,len=*),intent(in) :: str !! JSON string (if parsing from a !! string) -- only used if `unit=0` logical(LK),intent(in),optional :: skip_ws !! to ignore whitespace [default False] logical(LK),intent(in),optional :: skip_comments !! to ignore comment lines [default False] logical(LK),intent(out) :: eof !! true if the end of the file has !! been reached. character(kind=CK,len=1),intent(out) :: popped !! the popped character returned integer(IK) :: ios !! `iostat` flag integer(IK) :: str_len !! length of `str` character(kind=CK,len=1) :: c !! a character read from the file (or string) logical(LK) :: ignore !! if whitespace is to be ignored logical(LK) :: ignore_comments !! if comment lines are to be ignored logical(LK) :: parsing_comment !! if we are in the process !! of parsing a comment line if (.not. json%exception_thrown) then eof = .false. if (.not. present(skip_ws)) then ignore = .false. else ignore = skip_ws end if parsing_comment = .false. if (.not. present(skip_comments)) then ignore_comments = .false. else ignore_comments = skip_comments end if do if (json%pushed_index > 0) then ! there is a character pushed back on, most likely ! from the number parsing. Note: this can only occur if ! reading from a file when use_unformatted_stream=.false. c = json%pushed_char(json%pushed_index:json%pushed_index) json%pushed_index = json%pushed_index - 1 else if (unit/=0) then !read from the file !read the next character: if (use_unformatted_stream) then read(unit=unit,pos=json%ipos,iostat=ios) c else read(unit=unit,fmt='(A1)',advance='NO',iostat=ios) c end if json%ipos = json%ipos + 1 !....note: maybe try read the file in chunks... !.... or use asynchronous read with double buffering ! (see Modern Fortran: Style and Usage) else !read from the string str_len = len(str) !length of the string if (json%ipos<=str_len) then c = str(json%ipos:json%ipos) ios = 0 else ios = IOSTAT_END !end of the string end if json%ipos = json%ipos + 1 end if json%char_count = json%char_count + 1 !character count in the current line if (IS_IOSTAT_END(ios)) then !end of file ! no character to return json%char_count = 0 eof = .true. popped = space ! just to set a value exit else if (IS_IOSTAT_EOR(ios) .or. c==newline) then !end of record json%char_count = 0 json%line_count = json%line_count + 1 if (ignore_comments) parsing_comment = .false. ! done parsing this comment line cycle end if end if if (ignore_comments .and. (parsing_comment .or. c == json%comment_char) ) then ! skipping the comment parsing_comment = .true. cycle else if (any(c == control_chars)) then ! non printing ascii characters cycle else if (ignore .and. c == space) then ! ignoring whitespace cycle else ! return the character popped = c exit end if end do end if end subroutine pop_char !***************************************************************************************** !***************************************************************************************** !> ! Core routine. ! !### See also ! * [[pop_char]] ! !### History ! * Jacob Williams : 5/3/2015 : replaced original version of this routine. subroutine push_char(json,c) implicit none class(json_core),intent(inout) :: json character(kind=CK,len=1),intent(in) :: c !! to character to push character(kind=CK,len=max_numeric_str_len) :: istr !! for error printing if (.not. json%exception_thrown) then if (use_unformatted_stream) then !in this case, c is ignored, and we just !decrement the stream position counter: json%ipos = json%ipos - 1 else json%pushed_index = json%pushed_index + 1 if (json%pushed_index>0 .and. json%pushed_index<=len(json%pushed_char)) then json%pushed_char(json%pushed_index:json%pushed_index) = c else call integer_to_string(json%pushed_index,int_fmt,istr) call json%throw_exception('Error in push_char: '//& 'invalid valid of pushed_index: '//trim(istr)) end if end if !character count in the current line json%char_count = json%char_count - 1 end if end subroutine push_char !***************************************************************************************** !***************************************************************************************** !> author: Jacob Williams ! ! Print any error message, and then clear the exceptions. ! !@note This routine is used by the unit tests. ! It was originally in json_example.f90, and was ! moved here 2/26/2015 by Izaak Beekman. subroutine json_print_error_message(json,io_unit) implicit none class(json_core),intent(inout) :: json integer, intent(in), optional :: io_unit !! unit number for !! printing error message character(kind=CK,len=:),allocatable :: error_msg !! error message logical :: status_ok !! false if there were any errors thrown !get error message: call json%check_for_errors(status_ok, error_msg) !print it if there is one: if (.not. status_ok) then if (present(io_unit)) then write(io_unit,'(A)') error_msg else write(output_unit,'(A)') error_msg end if deallocate(error_msg) call json%clear_exceptions() end if end subroutine json_print_error_message !***************************************************************************************** !***************************************************************************************** end module json_value_module !*****************************************************************************************