json_file – JSON-Fortran

type, public :: json_file

The json_file is the main public class that is used to open a file and get data from it.

A json_file contains only two items: an instance of a json_core, which is used for all data manipulation, and a json_value pointer, which is used to construct the linked-list data structure. Note that most methods in the json_file class are simply wrappers to the lower-level routines in the json_value_module.

Example

    program test
    use json_module
    implicit none
    type(json_file) :: json
    integer :: ival
    real(real64) :: rval
    character(len=:),allocatable :: cval
    logical :: found
    call json%initialize(compact_reals=.true.)
    call json%load_file(filename='myfile.json')
    call json%print_file() !print to the console
    call json%get('var.i',ival,found)
    call json%get('var.r(3)',rval,found)
    call json%get('var.c',cval,found)
    call json%destroy()
    end program test

Warning

The destroy() method must be called before the variable goes out of scope or a memory leak will occur.

Inherits

Help

Variables

core p

Constructor

json_file

Type-Bound Procedures

add check_for_errors clear_exceptions destroy failed get get_core info initialize initialize_json_core_in_file json_file_add_double json_file_add_double_vec json_file_add_integer json_file_add_integer_vec json_file_add_logical json_file_add_logical_vec json_file_add_object json_file_add_string json_file_add_string_vec json_file_get_alloc_string_vec json_file_get_double json_file_get_double_vec json_file_get_integer json_file_get_integer_vec json_file_get_logical json_file_get_logical_vec json_file_get_object json_file_get_root json_file_get_string json_file_get_string_vec json_file_load_from_string json_file_print_1 json_file_print_2 json_file_print_to_console json_file_remove json_file_rename json_file_update_integer json_file_update_logical json_file_update_real json_file_update_string json_file_valid_path json_file_valid_path_op json_file_variable_info json_file_variable_matrix_info load_file load_from_string matrix_info move operator(.in.) print_error_message print_file print_to_string remove rename set_json_core_in_file traverse update valid_path

Source Code

json_file

Components

Type	Visibility	Attributes		Name		Initial
type(json_core),	private		::	core			The instance of the json_core factory used for this file.
type(json_value),	private,	pointer	::	p	=>	null()	the JSON structure read from the file

Constructor

public interface json_file

Structure constructor to initialize a json_file object with an existing json_value object, and either the json_core settings or a json_core instance.

private function initialize_json_file(p, 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(file_object)

Author: Izaak Beekman
Date: 07/23/2015

Cast a json_value object as a json_file object. It also calls the initialize() method.

Arguments

Type	Intent	Optional	Attributes		Name
type(json_value),	intent(in),	optional	pointer	::	p	`json_value` object to cast as a `json_file` object
logical(kind=LK),	intent(in),	optional		::	verbose	mainly useful for debugging (default is false)
logical(kind=LK),	intent(in),	optional		::	compact_reals	to compact the real number strings for output (default is true)
logical(kind=LK),	intent(in),	optional		::	print_signs	always print numeric sign (default is false)
character(kind=CDK,len=*),	intent(in),	optional		::	real_format	Real number format: 'E' [default], '*', 'G', 'EN', or 'ES'
integer(kind=IK),	intent(in),	optional		::	spaces_per_tab	number of spaces per tab for indenting (default is 2)
logical(kind=LK),	intent(in),	optional		::	strict_type_checking	if true, no integer, double, or logical type conversions are done for the `get` routines (default is false)
logical(kind=LK),	intent(in),	optional		::	trailing_spaces_significant	for name and path comparisons, is trailing space to be considered significant. (default is false)
logical(kind=LK),	intent(in),	optional		::	case_sensitive_keys	for name and path comparisons, are they case sensitive. (default is true)
logical(kind=LK),	intent(in),	optional		::	no_whitespace	if true, printing the JSON structure is done without adding any non-significant spaces or linebreaks (default is false)
logical(kind=LK),	intent(in),	optional		::	unescape_strings	If false, then the raw escaped string is returned from json_get_string and similar routines. If true [default], then the string is returned unescaped.
character(kind=CK,len=1),	intent(in),	optional		::	comment_char	If present, this character is used to denote comments in the JSON file, which will be ignored if present. Example: `!` or `#`. Setting this to a blank string disables the ignoring of comments. (Default is `!`).
integer(kind=IK),	intent(in),	optional		::	path_mode	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),	intent(in),	optional		::	path_separator	The `path` separator to use in the "default" mode for the paths in the various `get_by_path` routines. Example: `.` [default] or `%`. Note: if `path_mode/=1` then this is ignored.
logical(kind=LK),	intent(in),	optional		::	compress_vectors	If true, then arrays of integers, nulls, doubles, and logicals are printed all on one line. [Note: `no_whitespace` will override this option if necessary]. (Default is False).
logical(kind=LK),	intent(in),	optional		::	allow_duplicate_keys	Read more…
logical(kind=LK),	intent(in),	optional		::	escape_solidus	Read more…
logical(kind=LK),	intent(in),	optional		::	stop_on_error	If an exception is raised, then immediately quit. (Default is False).

Return Value type(json_file)

private function initialize_json_file_v2(json_value_object, json_core_object) result(file_object)

Author: Jacob Williams
Date: 4/26/2016

Cast a json_value pointer and a json_core object as a json_file object.

Arguments

Type	Intent	Optional	Attributes		Name
type(json_value),	intent(in),		pointer	::	json_value_object
type(json_core),	intent(in)			::	json_core_object

Return Value type(json_file)

Type-Bound Procedures

generic, public :: add => json_file_add_object, json_file_add_integer, json_file_add_double, json_file_add_logical, json_file_add_string, json_file_add_integer_vec, json_file_add_double_vec, json_file_add_logical_vec, json_file_add_string_vec

Add a variable to a json_file, by specifying the path.

Example

  program test
  use json_module, rk=>json_rk, ik=>json_ik
  implicit none
  type(json_file) :: f
  call f%initialize()  ! specify whatever init options you want.
  call f%add('inputs.t', 0.0_rk)
  call f%add('inputs.x', [1.0_rk,2.0_rk,3.0_rk])
  call f%add('inputs.flag', .true.)
  call f%print_file()
  end program test

private subroutine json_file_add_object(me, path, p, found, was_created)

Author: Jacob Williams

Add a json_value pointer to an object to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
type(json_value),	intent(in),		pointer	::	p	pointer to the variable to add
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created

private subroutine json_file_add_integer(me, path, val, found, was_created)

Author: Jacob Williams

Add an integer value to a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
integer(kind=IK),	intent(in)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found
logical(kind=LK),	intent(out),	optional	::	was_created	if the variable had to be created

private subroutine json_file_add_double(me, path, val, found, was_created)

Author: Jacob Williams

Add a real(RK) variable value to a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
real(kind=RK),	intent(in)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found
logical(kind=LK),	intent(out),	optional	::	was_created	if the variable had to be created

private subroutine json_file_add_logical(me, path, val, found, was_created)

Author: Jacob Williams

Add a logical(LK) value to a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
logical(kind=LK),	intent(in)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found
logical(kind=LK),	intent(out),	optional	::	was_created	if the variable had to be created

private subroutine json_file_add_string(me, path, val, found, was_created, trim_str, adjustl_str)

Author: Jacob Williams

Add a character string to a json file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
character(kind=CK,len=*),	intent(in)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found
logical(kind=LK),	intent(out),	optional	::	was_created	if the variable had to be created
logical(kind=LK),	intent(in),	optional	::	trim_str	if TRIM() should be called for the `val`
logical(kind=LK),	intent(in),	optional	::	adjustl_str	if ADJUSTL() should be called for the `val` (note that ADJUSTL is done before TRIM)

private subroutine json_file_add_integer_vec(me, path, vec, found, was_created)

Author: Jacob Williams

Add an integer vector to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
integer(kind=IK),	intent(in),		dimension(:)	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created

private subroutine json_file_add_double_vec(me, path, vec, found, was_created)

Author: Jacob Williams

Add a real(RK) vector to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
real(kind=RK),	intent(in),		dimension(:)	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created

private subroutine json_file_add_logical_vec(me, path, vec, found, was_created)

Author: Jacob Williams

Add a logical(LK) vector to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
logical(kind=LK),	intent(in),		dimension(:)	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created

private subroutine json_file_add_string_vec(me, path, vec, found, was_created, ilen, trim_str, adjustl_str)

Author: Jacob Williams

Add a string vector to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
character(kind=CK,len=*),	intent(in),		dimension(:)	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created
integer(kind=IK),	intent(in),	optional	dimension(:)	::	ilen	the string lengths of each element in `value`. If not present, the full `len(value)` string is added for each element.
logical(kind=LK),	intent(in),	optional		::	trim_str	if TRIM() should be called for each element
logical(kind=LK),	intent(in),	optional		::	adjustl_str	if ADJUSTL() should be called for each element (note that ADJUSTL is done before TRIM)

procedure, public :: check_for_errors => json_file_check_for_errors

private subroutine json_file_check_for_errors(me, status_ok, error_msg)

Retrieve error status and message from the class.

Arguments

Type	Intent	Attributes		Name
class(json_file),	intent(inout)		::	me
logical(kind=LK),	intent(out)		::	status_ok	true if there were no errors
character(kind=CK,len=:),	intent(out),	allocatable	::	error_msg	the error message (if there were errors)

procedure, public :: clear_exceptions => json_file_clear_exceptions

private pure subroutine json_file_clear_exceptions(me)

Clear exceptions in the class.

Arguments

Type Intent Optional Attributes Name

class(json_file), intent(inout) :: me

procedure, public :: destroy => json_file_destroy

private subroutine json_file_destroy(me, destroy_core)

Author: Jacob Williams

Destroy the json_value data in a json_file. This must be done when the variable is no longer needed, or will be reused to open a different file. Otherwise a memory leak will occur.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
logical,	intent(in),	optional		::	destroy_core	to also destroy the json_core. default is to leave it as is.

procedure, public :: failed => json_file_failed

private pure function json_file_failed(me) result(failed)

Check error status in the file.

Arguments

Type Intent Optional Attributes Name

class(json_file), intent(in) :: me

Return Value logical(kind=LK)

will be true if there has been an error.

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(in)			::	me

generic, public :: get => json_file_get_object, json_file_get_integer, json_file_get_double, json_file_get_logical, json_file_get_string, json_file_get_integer_vec, json_file_get_double_vec, json_file_get_logical_vec, json_file_get_string_vec, json_file_get_alloc_string_vec, json_file_get_root

Get a variable from a json_file, by specifying the path.

private subroutine json_file_get_object(me, path, p, found)

Author: Jacob Williams
Date: 2/3/2014

Get a json_value pointer to an object from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
type(json_value),	intent(out),		pointer	::	p	pointer to the variable
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

private subroutine json_file_get_integer(me, path, val, found)

Author: Jacob Williams
Date: 12/9/2013

Get an integer value from a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
integer(kind=IK),	intent(out)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if it was really found

private subroutine json_file_get_double(me, path, val, found)

Author: Jacob Williams
Date: 12/9/2013

Get a real(RK) variable value from a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
real(kind=RK),	intent(out)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if it was really found

private subroutine json_file_get_logical(me, path, val, found)

Author: Jacob Williams
Date: 12/9/2013

Get a logical(LK) value from a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
logical(kind=LK),	intent(out)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if it was really found

private subroutine json_file_get_string(me, path, val, found)

Author: Jacob Williams
Date: 12/9/2013

Get a character string from a json file. The output val is an allocatable character string.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
character(kind=CK,len=:),	intent(out),		allocatable	::	val	value
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

private subroutine json_file_get_integer_vec(me, path, vec, found)

Author: Jacob Williams
Date: 1/20/2014

Get an integer vector from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
integer(kind=IK),	intent(out),		dimension(:), allocatable	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

private subroutine json_file_get_double_vec(me, path, vec, found)

Author: Jacob Williams
Date: 1/19/2014

Get a real(RK) vector from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
real(kind=RK),	intent(out),		dimension(:), allocatable	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

private subroutine json_file_get_logical_vec(me, path, vec, found)

Author: Jacob Williams
Date: 1/20/2014

Get a logical(LK) vector from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
logical(kind=LK),	intent(out),		dimension(:), allocatable	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

private subroutine json_file_get_string_vec(me, path, vec, found)

Author: Jacob Williams
Date: 1/19/2014

Get a string vector from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
character(kind=CK,len=*),	intent(out),		dimension(:), allocatable	::	vec	value vector
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

private subroutine json_file_get_alloc_string_vec(me, path, vec, ilen, found)

Author: Jacob Williams
Date: 12/17/2016

Get an (allocatable length) string vector from a JSON file. This is just a wrapper for json_get_alloc_string_vec_by_path.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
character(kind=CK,len=:),	intent(out),		dimension(:), allocatable	::	vec	value vector
integer(kind=IK),	intent(out),		dimension(:), allocatable	::	ilen	the actual length of each character string in the array
logical(kind=LK),	intent(out),	optional		::	found

private subroutine json_file_get_root(me, p)

Author: Izaak Beekman
Date: 7/23/2015

Get a json_value pointer to the JSON file root.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
type(json_value),	intent(out),		pointer	::	p	pointer to the variable

procedure, public :: get_core => get_json_core_in_file

private subroutine get_json_core_in_file(me, core)

Get a copy of the json_core in this json_file.

Arguments

Type Intent Optional Attributes Name

class(json_file), intent(in) :: me

type(json_core), intent(out) :: core

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(in)			::	me
type(json_core),	intent(out)			::	core

generic, public :: info => json_file_variable_info

private subroutine json_file_variable_info(me, path, found, var_type, n_children, name)

Author: Jacob Williams
Date: 2/3/2014

Returns information about a variable in a json_file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	path to the variable
logical(kind=LK),	intent(out),	optional		::	found	the variable exists in the structure
integer(kind=IK),	intent(out),	optional		::	var_type	variable type
integer(kind=IK),	intent(out),	optional		::	n_children	number of children
character(kind=CK,len=:),	intent(out),	optional	allocatable	::	name	variable name

generic, public :: initialize => initialize_json_core_in_file, set_json_core_in_file

private subroutine initialize_json_core_in_file(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)

Initialize the json_core for this json_file. This is just a wrapper for json_initialize.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
logical(kind=LK),	intent(in),	optional	::	verbose	mainly useful for debugging (default is false)
logical(kind=LK),	intent(in),	optional	::	compact_reals	to compact the real number strings for output (default is true)
logical(kind=LK),	intent(in),	optional	::	print_signs	always print numeric sign (default is false)
character(kind=CDK,len=*),	intent(in),	optional	::	real_format	Real number format: 'E' [default], '*', 'G', 'EN', or 'ES'
integer(kind=IK),	intent(in),	optional	::	spaces_per_tab	number of spaces per tab for indenting (default is 2)
logical(kind=LK),	intent(in),	optional	::	strict_type_checking	if true, no integer, double, or logical type conversions are done for the `get` routines (default is false)
logical(kind=LK),	intent(in),	optional	::	trailing_spaces_significant	for name and path comparisons, is trailing space to be considered significant. (default is false)
logical(kind=LK),	intent(in),	optional	::	case_sensitive_keys	for name and path comparisons, are they case sensitive. (default is true)
logical(kind=LK),	intent(in),	optional	::	no_whitespace	if true, printing the JSON structure is done without adding any non-significant spaces or linebreaks (default is false)
logical(kind=LK),	intent(in),	optional	::	unescape_strings	If false, then the raw escaped string is returned from json_get_string and similar routines. If true [default], then the string is returned unescaped.
character(kind=CK,len=1),	intent(in),	optional	::	comment_char	If present, this character is used to denote comments in the JSON file, which will be ignored if present. Example: `!` or `#`. Setting this to a blank string disables the ignoring of comments. (Default is `!`).
integer(kind=IK),	intent(in),	optional	::	path_mode	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),	intent(in),	optional	::	path_separator	The `path` separator to use in the "default" mode for the paths in the various `get_by_path` routines. Example: `.` [default] or `%`. Note: if `path_mode/=1` then this is ignored.
logical(kind=LK),	intent(in),	optional	::	compress_vectors	If true, then arrays of integers, nulls, doubles, and logicals are printed all on one line. [Note: `no_whitespace` will override this option if necessary]. (Default is False).
logical(kind=LK),	intent(in),	optional	::	allow_duplicate_keys	Read more…
logical(kind=LK),	intent(in),	optional	::	escape_solidus	Read more…
logical(kind=LK),	intent(in),	optional	::	stop_on_error	If an exception is raised, then immediately quit. (Default is False).

private subroutine set_json_core_in_file(me, core)

Set the json_core for this json_file.
Read more…
Arguments

Type Intent Optional Attributes Name

class(json_file), intent(inout) :: me

type(json_core), intent(in) :: core

procedure, public :: initialize_json_core_in_file

private subroutine initialize_json_core_in_file(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)

Initialize the json_core for this json_file. This is just a wrapper for json_initialize.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
logical(kind=LK),	intent(in),	optional	::	verbose	mainly useful for debugging (default is false)
logical(kind=LK),	intent(in),	optional	::	compact_reals	to compact the real number strings for output (default is true)
logical(kind=LK),	intent(in),	optional	::	print_signs	always print numeric sign (default is false)
character(kind=CDK,len=*),	intent(in),	optional	::	real_format	Real number format: 'E' [default], '*', 'G', 'EN', or 'ES'
integer(kind=IK),	intent(in),	optional	::	spaces_per_tab	number of spaces per tab for indenting (default is 2)
logical(kind=LK),	intent(in),	optional	::	strict_type_checking	if true, no integer, double, or logical type conversions are done for the `get` routines (default is false)
logical(kind=LK),	intent(in),	optional	::	trailing_spaces_significant	for name and path comparisons, is trailing space to be considered significant. (default is false)
logical(kind=LK),	intent(in),	optional	::	case_sensitive_keys	for name and path comparisons, are they case sensitive. (default is true)
logical(kind=LK),	intent(in),	optional	::	no_whitespace	if true, printing the JSON structure is done without adding any non-significant spaces or linebreaks (default is false)
logical(kind=LK),	intent(in),	optional	::	unescape_strings	If false, then the raw escaped string is returned from json_get_string and similar routines. If true [default], then the string is returned unescaped.
character(kind=CK,len=1),	intent(in),	optional	::	comment_char	If present, this character is used to denote comments in the JSON file, which will be ignored if present. Example: `!` or `#`. Setting this to a blank string disables the ignoring of comments. (Default is `!`).
integer(kind=IK),	intent(in),	optional	::	path_mode	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),	intent(in),	optional	::	path_separator	The `path` separator to use in the "default" mode for the paths in the various `get_by_path` routines. Example: `.` [default] or `%`. Note: if `path_mode/=1` then this is ignored.
logical(kind=LK),	intent(in),	optional	::	compress_vectors	If true, then arrays of integers, nulls, doubles, and logicals are printed all on one line. [Note: `no_whitespace` will override this option if necessary]. (Default is False).
logical(kind=LK),	intent(in),	optional	::	allow_duplicate_keys	Read more…
logical(kind=LK),	intent(in),	optional	::	escape_solidus	Read more…
logical(kind=LK),	intent(in),	optional	::	stop_on_error	If an exception is raised, then immediately quit. (Default is False).

procedure, public :: json_file_add_double

private subroutine json_file_add_double(me, path, val, found, was_created)

Author: Jacob Williams

Add a real(RK) variable value to a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
real(kind=RK),	intent(in)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found
logical(kind=LK),	intent(out),	optional	::	was_created	if the variable had to be created

procedure, public :: json_file_add_double_vec

private subroutine json_file_add_double_vec(me, path, vec, found, was_created)

Author: Jacob Williams

Add a real(RK) vector to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
real(kind=RK),	intent(in),		dimension(:)	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created

procedure, public :: json_file_add_integer

private subroutine json_file_add_integer(me, path, val, found, was_created)

Author: Jacob Williams

Add an integer value to a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
integer(kind=IK),	intent(in)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found
logical(kind=LK),	intent(out),	optional	::	was_created	if the variable had to be created

procedure, public :: json_file_add_integer_vec

private subroutine json_file_add_integer_vec(me, path, vec, found, was_created)

Author: Jacob Williams

Add an integer vector to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
integer(kind=IK),	intent(in),		dimension(:)	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created

procedure, public :: json_file_add_logical

private subroutine json_file_add_logical(me, path, val, found, was_created)

Author: Jacob Williams

Add a logical(LK) value to a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
logical(kind=LK),	intent(in)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found
logical(kind=LK),	intent(out),	optional	::	was_created	if the variable had to be created

procedure, public :: json_file_add_logical_vec

private subroutine json_file_add_logical_vec(me, path, vec, found, was_created)

Author: Jacob Williams

Add a logical(LK) vector to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
logical(kind=LK),	intent(in),		dimension(:)	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created

procedure, public :: json_file_add_object

private subroutine json_file_add_object(me, path, p, found, was_created)

Author: Jacob Williams

Add a json_value pointer to an object to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
type(json_value),	intent(in),		pointer	::	p	pointer to the variable to add
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created

procedure, public :: json_file_add_string

private subroutine json_file_add_string(me, path, val, found, was_created, trim_str, adjustl_str)

Author: Jacob Williams

Add a character string to a json file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
character(kind=CK,len=*),	intent(in)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found
logical(kind=LK),	intent(out),	optional	::	was_created	if the variable had to be created
logical(kind=LK),	intent(in),	optional	::	trim_str	if TRIM() should be called for the `val`
logical(kind=LK),	intent(in),	optional	::	adjustl_str	if ADJUSTL() should be called for the `val` (note that ADJUSTL is done before TRIM)

procedure, public :: json_file_add_string_vec

private subroutine json_file_add_string_vec(me, path, vec, found, was_created, ilen, trim_str, adjustl_str)

Author: Jacob Williams

Add a string vector to a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
character(kind=CK,len=*),	intent(in),		dimension(:)	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if the variable was found
logical(kind=LK),	intent(out),	optional		::	was_created	if the variable had to be created
integer(kind=IK),	intent(in),	optional	dimension(:)	::	ilen	the string lengths of each element in `value`. If not present, the full `len(value)` string is added for each element.
logical(kind=LK),	intent(in),	optional		::	trim_str	if TRIM() should be called for each element
logical(kind=LK),	intent(in),	optional		::	adjustl_str	if ADJUSTL() should be called for each element (note that ADJUSTL is done before TRIM)

procedure, public :: json_file_get_alloc_string_vec

private subroutine json_file_get_alloc_string_vec(me, path, vec, ilen, found)

Author: Jacob Williams
Date: 12/17/2016

Get an (allocatable length) string vector from a JSON file. This is just a wrapper for json_get_alloc_string_vec_by_path.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
character(kind=CK,len=:),	intent(out),		dimension(:), allocatable	::	vec	value vector
integer(kind=IK),	intent(out),		dimension(:), allocatable	::	ilen	the actual length of each character string in the array
logical(kind=LK),	intent(out),	optional		::	found

procedure, public :: json_file_get_double

private subroutine json_file_get_double(me, path, val, found)

Author: Jacob Williams
Date: 12/9/2013

Get a real(RK) variable value from a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
real(kind=RK),	intent(out)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if it was really found

procedure, public :: json_file_get_double_vec

private subroutine json_file_get_double_vec(me, path, vec, found)

Author: Jacob Williams
Date: 1/19/2014

Get a real(RK) vector from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
real(kind=RK),	intent(out),		dimension(:), allocatable	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

procedure, public :: json_file_get_integer

private subroutine json_file_get_integer(me, path, val, found)

Author: Jacob Williams
Date: 12/9/2013

Get an integer value from a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
integer(kind=IK),	intent(out)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if it was really found

procedure, public :: json_file_get_integer_vec

private subroutine json_file_get_integer_vec(me, path, vec, found)

Author: Jacob Williams
Date: 1/20/2014

Get an integer vector from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
integer(kind=IK),	intent(out),		dimension(:), allocatable	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

procedure, public :: json_file_get_logical

private subroutine json_file_get_logical(me, path, val, found)

Author: Jacob Williams
Date: 12/9/2013

Get a logical(LK) value from a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
logical(kind=LK),	intent(out)		::	val	value
logical(kind=LK),	intent(out),	optional	::	found	if it was really found

procedure, public :: json_file_get_logical_vec

private subroutine json_file_get_logical_vec(me, path, vec, found)

Author: Jacob Williams
Date: 1/20/2014

Get a logical(LK) vector from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
logical(kind=LK),	intent(out),		dimension(:), allocatable	::	vec	the value vector
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

procedure, public :: json_file_get_object

private subroutine json_file_get_object(me, path, p, found)

Author: Jacob Williams
Date: 2/3/2014

Get a json_value pointer to an object from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
type(json_value),	intent(out),		pointer	::	p	pointer to the variable
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

procedure, public :: json_file_get_root

private subroutine json_file_get_root(me, p)

Author: Izaak Beekman
Date: 7/23/2015

Get a json_value pointer to the JSON file root.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
type(json_value),	intent(out),		pointer	::	p	pointer to the variable

procedure, public :: json_file_get_string

private subroutine json_file_get_string(me, path, val, found)

Author: Jacob Williams
Date: 12/9/2013

Get a character string from a json file. The output val is an allocatable character string.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
character(kind=CK,len=:),	intent(out),		allocatable	::	val	value
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

procedure, public :: json_file_get_string_vec

private subroutine json_file_get_string_vec(me, path, vec, found)

Author: Jacob Williams
Date: 1/19/2014

Get a string vector from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
character(kind=CK,len=*),	intent(out),		dimension(:), allocatable	::	vec	value vector
logical(kind=LK),	intent(out),	optional		::	found	if it was really found

procedure, public :: json_file_load_from_string

private subroutine json_file_load_from_string(me, str)

Author: Jacob Williams
Date: 1/13/2015

Load the JSON data from a string.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	str	string to load JSON data from

procedure, public :: json_file_print_1

private subroutine json_file_print_1(me, iunit)

Author: Jacob Williams
Date: 12/9/2013

Prints the JSON file to the specified file unit number.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
integer(kind=IK),	intent(in)			::	iunit	file unit number (must not be -1)

procedure, public :: json_file_print_2

private subroutine json_file_print_2(me, filename)

Author: Jacob Williams
Date: 1/11/2015

Print the JSON structure to the specified filename. The file is opened, printed, and then closed.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CDK,len=*),	intent(in)			::	filename	filename to print to

procedure, public :: json_file_print_to_console

private subroutine json_file_print_to_console(me)

Author
Jacob Williams

Date
1/11/2015

Print the JSON file to the console.

Arguments

Type Intent Optional Attributes Name

class(json_file), intent(inout) :: me

procedure, public :: json_file_remove

private subroutine json_file_remove(me, path)

Author: Jacob Williams
Date: 7/7/2018

Remove a variable from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable

procedure, public :: json_file_rename

private subroutine json_file_rename(me, path, name, found)

Author: Jacob Williams

Rename a variable in a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
character(kind=CK,len=*),	intent(in)		::	name	the new name
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found

procedure, public :: json_file_update_integer

private subroutine json_file_update_integer(me, path, val, found)

Author: Jacob Williams
Date: 1/10/2015

Given the path string, if the variable is present in the file, and is a scalar, then update its value. If it is not present, then create it and set its value.

Arguments

Type	Intent		Name
class(json_file),	intent(inout)	::	me
character(kind=CK,len=*),	intent(in)	::	path
integer(kind=IK),	intent(in)	::	val
logical(kind=LK),	intent(out)	::	found

procedure, public :: json_file_update_logical

private subroutine json_file_update_logical(me, path, val, found)

Author: Jacob Williams
Date: 1/10/2015

Given the path string, if the variable is present in the file, and is a scalar, then update its value. If it is not present, then create it and set its value.

Arguments

Type	Intent		Name
class(json_file),	intent(inout)	::	me
character(kind=CK,len=*),	intent(in)	::	path
logical(kind=LK),	intent(in)	::	val
logical(kind=LK),	intent(out)	::	found

procedure, public :: json_file_update_real

private subroutine json_file_update_real(me, path, val, found)

Author: Jacob Williams
Date: 1/10/2015

Given the path string, if the variable is present in the file, and is a scalar, then update its value. If it is not present, then create it and set its value.

Arguments

Type	Intent		Name
class(json_file),	intent(inout)	::	me
character(kind=CK,len=*),	intent(in)	::	path
real(kind=RK),	intent(in)	::	val
logical(kind=LK),	intent(out)	::	found

procedure, public :: json_file_update_string

private subroutine json_file_update_string(me, path, val, found, trim_str, adjustl_str)

Author: Jacob Williams
Date: 1/10/2015

Given the path string, if the variable is present in the file, and is a scalar, then update its value. If it is not present, then create it and set its value.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path
character(kind=CK,len=*),	intent(in)		::	val
logical(kind=LK),	intent(out)		::	found
logical(kind=LK),	intent(in),	optional	::	trim_str	if TRIM() should be called for the `val`
logical(kind=LK),	intent(in),	optional	::	adjustl_str	if ADJUSTL() should be called for the `val` (note that ADJUSTL is done before TRIM)

procedure, public :: json_file_valid_path

private function json_file_valid_path(me, path) result(found)

Author: Jacob Williams

Returns true if the path is present in the JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable

Return Value logical(kind=LK)

if the variable was found

procedure, public, pass(me) :: json_file_valid_path_op

private function json_file_valid_path_op(path, me) result(found)

Author: Jacob Williams

A wrapper for json_file_valid_path for the .in. operator

Arguments

Type	Intent	Optional	Attributes		Name
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
class(json_file),	intent(in)			::	me	the JSON file

Return Value logical(kind=LK)

if the variable was found

procedure, public :: json_file_variable_info

private subroutine json_file_variable_info(me, path, found, var_type, n_children, name)

Author: Jacob Williams
Date: 2/3/2014

Returns information about a variable in a json_file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	path to the variable
logical(kind=LK),	intent(out),	optional		::	found	the variable exists in the structure
integer(kind=IK),	intent(out),	optional		::	var_type	variable type
integer(kind=IK),	intent(out),	optional		::	n_children	number of children
character(kind=CK,len=:),	intent(out),	optional	allocatable	::	name	variable name

procedure, public :: json_file_variable_matrix_info

private subroutine json_file_variable_matrix_info(me, path, is_matrix, found, var_type, n_sets, set_size, name)

Author: Jacob Williams
Date: 6/26/2016

Returns matrix information about a variable in a json_file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	path to the variable
logical(kind=LK),	intent(out)			::	is_matrix	true if it is a valid matrix
logical(kind=LK),	intent(out),	optional		::	found	true if it was found
integer(kind=IK),	intent(out),	optional		::	var_type	variable type of data in the matrix (if all elements have the same type)
integer(kind=IK),	intent(out),	optional		::	n_sets	number of data sets (i.e., matrix rows if using row-major order)
integer(kind=IK),	intent(out),	optional		::	set_size	size of each data set (i.e., matrix cols if using row-major order)
character(kind=CK,len=:),	intent(out),	optional	allocatable	::	name	variable name

procedure, public :: load_file => json_file_load

private subroutine json_file_load(me, filename, unit)

Author: Jacob Williams
Date: 12/9/2013

Load the JSON data from a file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CDK,len=*),	intent(in)		::	filename	the filename to open
integer(kind=IK),	intent(in),	optional	::	unit	the unit number to use (if not present, a newunit is used)

generic, public :: load_from_string => json_file_load_from_string

private subroutine json_file_load_from_string(me, str)

Author: Jacob Williams
Date: 1/13/2015

Load the JSON data from a string.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	str	string to load JSON data from

generic, public :: matrix_info => json_file_variable_matrix_info

private subroutine json_file_variable_matrix_info(me, path, is_matrix, found, var_type, n_sets, set_size, name)

Author: Jacob Williams
Date: 6/26/2016

Returns matrix information about a variable in a json_file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	path to the variable
logical(kind=LK),	intent(out)			::	is_matrix	true if it is a valid matrix
logical(kind=LK),	intent(out),	optional		::	found	true if it was found
integer(kind=IK),	intent(out),	optional		::	var_type	variable type of data in the matrix (if all elements have the same type)
integer(kind=IK),	intent(out),	optional		::	n_sets	number of data sets (i.e., matrix rows if using row-major order)
integer(kind=IK),	intent(out),	optional		::	set_size	size of each data set (i.e., matrix cols if using row-major order)
character(kind=CK,len=:),	intent(out),	optional	allocatable	::	name	variable name

procedure, public :: move => json_file_move_pointer

private subroutine json_file_move_pointer(to, from)

Author
Jacob Williams

Date
12/5/2014

Move the json_value pointer from one json_file to another. The "from" pointer is then nullified, but not destroyed.
Read more…
Arguments

Type Intent Optional Attributes Name

class(json_file), intent(inout) :: to

class(json_file), intent(inout) :: from

generic, public :: operator(.in.) => json_file_valid_path_op

private function json_file_valid_path_op(path, me) result(found)

Author: Jacob Williams

A wrapper for json_file_valid_path for the .in. operator

Arguments

Type	Intent	Optional	Attributes		Name
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable
class(json_file),	intent(in)			::	me	the JSON file

Return Value logical(kind=LK)

if the variable was found

procedure, public :: print_error_message => json_file_print_error_message

private subroutine json_file_print_error_message(me, io_unit)

This is a wrapper for json_print_error_message.

Arguments

Type Intent Optional Attributes Name

class(json_file), intent(inout) :: me

integer, intent(in), optional :: io_unit

generic, public :: print_file => json_file_print_to_console, json_file_print_1, json_file_print_2

private subroutine json_file_print_to_console(me)

Author
Jacob Williams

Date
1/11/2015

Print the JSON file to the console.

Arguments

Type Intent Optional Attributes Name

class(json_file), intent(inout) :: me

private subroutine json_file_print_1(me, iunit)

Author: Jacob Williams
Date: 12/9/2013

Prints the JSON file to the specified file unit number.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
integer(kind=IK),	intent(in)			::	iunit	file unit number (must not be -1)

private subroutine json_file_print_2(me, filename)

Author: Jacob Williams
Date: 1/11/2015

Print the JSON structure to the specified filename. The file is opened, printed, and then closed.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CDK,len=*),	intent(in)			::	filename	filename to print to

procedure, public :: print_to_string => json_file_print_to_string

private subroutine json_file_print_to_string(me, str)

Author: Jacob Williams
Date: 1/11/2015

Print the JSON file to a string.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=:),	intent(out),		allocatable	::	str	string to print JSON data to

generic, public :: remove => json_file_remove

Remove a variable from a json_file by specifying the path.

private subroutine json_file_remove(me, path)

Author: Jacob Williams
Date: 7/7/2018

Remove a variable from a JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable

generic, public :: rename => json_file_rename

Rename a variable, specifying it by path

private subroutine json_file_rename(me, path, name, found)

Author: Jacob Williams

Rename a variable in a JSON file.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path	the path to the variable
character(kind=CK,len=*),	intent(in)		::	name	the new name
logical(kind=LK),	intent(out),	optional	::	found	if the variable was found

procedure, public :: set_json_core_in_file

private subroutine set_json_core_in_file(me, core)

Set the json_core for this json_file.
Read more…
Arguments

Type Intent Optional Attributes Name

class(json_file), intent(inout) :: me

type(json_core), intent(in) :: core

procedure, public :: traverse => json_file_traverse

private subroutine json_file_traverse(me, traverse_callback)

Author: Jacob Williams
Date: 6/11/2016

Traverse the JSON structure in the file. This routine calls the user-specified json_traverse_callback_func for each element of the structure.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
procedure(json_traverse_callback_func)				::	traverse_callback

generic, public :: update => json_file_update_integer, json_file_update_logical, json_file_update_real, json_file_update_string

Update a scalar variable in a json_file, by specifying the path.

Note

These have been mostly supplanted by the add methods, which do a similar thing (and can be used for scalars and vectors, etc.)

private subroutine json_file_update_integer(me, path, val, found)

Author: Jacob Williams
Date: 1/10/2015

Given the path string, if the variable is present in the file, and is a scalar, then update its value. If it is not present, then create it and set its value.

Arguments

Type	Intent		Name
class(json_file),	intent(inout)	::	me
character(kind=CK,len=*),	intent(in)	::	path
integer(kind=IK),	intent(in)	::	val
logical(kind=LK),	intent(out)	::	found

private subroutine json_file_update_logical(me, path, val, found)

Author: Jacob Williams
Date: 1/10/2015

Given the path string, if the variable is present in the file, and is a scalar, then update its value. If it is not present, then create it and set its value.

Arguments

Type	Intent		Name
class(json_file),	intent(inout)	::	me
character(kind=CK,len=*),	intent(in)	::	path
logical(kind=LK),	intent(in)	::	val
logical(kind=LK),	intent(out)	::	found

private subroutine json_file_update_real(me, path, val, found)

Author: Jacob Williams
Date: 1/10/2015

Given the path string, if the variable is present in the file, and is a scalar, then update its value. If it is not present, then create it and set its value.

Arguments

Type	Intent		Name
class(json_file),	intent(inout)	::	me
character(kind=CK,len=*),	intent(in)	::	path
real(kind=RK),	intent(in)	::	val
logical(kind=LK),	intent(out)	::	found

private subroutine json_file_update_string(me, path, val, found, trim_str, adjustl_str)

Author: Jacob Williams
Date: 1/10/2015

Given the path string, if the variable is present in the file, and is a scalar, then update its value. If it is not present, then create it and set its value.

Arguments

Type	Intent	Optional		Name
class(json_file),	intent(inout)		::	me
character(kind=CK,len=*),	intent(in)		::	path
character(kind=CK,len=*),	intent(in)		::	val
logical(kind=LK),	intent(out)		::	found
logical(kind=LK),	intent(in),	optional	::	trim_str	if TRIM() should be called for the `val`
logical(kind=LK),	intent(in),	optional	::	adjustl_str	if ADJUSTL() should be called for the `val` (note that ADJUSTL is done before TRIM)

generic, public :: valid_path => json_file_valid_path

Verify that a path is valid (i.e., a variable with this path exists in the file).

private function json_file_valid_path(me, path) result(found)

Author: Jacob Williams

Returns true if the path is present in the JSON file.

Arguments

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
character(kind=CK,len=*),	intent(in)			::	path	the path to the variable

Return Value logical(kind=LK)

if the variable was found

Source Code

    type,public :: json_file

        private

        type(json_core) :: core !! The instance of the [[json_core(type)]] factory used for this file.
        type(json_value),pointer :: p => null()  !! the JSON structure read from the file

    contains

        generic,public :: initialize => initialize_json_core_in_file,&
                                        set_json_core_in_file

        procedure,public :: get_core => get_json_core_in_file

        procedure,public :: load_file => json_file_load

        generic,public :: load_from_string => MAYBEWRAP(json_file_load_from_string)

        procedure,public :: destroy => json_file_destroy
        procedure,public :: move    => json_file_move_pointer
        generic,public   :: info    => MAYBEWRAP(json_file_variable_info)
        generic,public   :: matrix_info => MAYBEWRAP(json_file_variable_matrix_info)

        !error checking:
        procedure,public :: failed => json_file_failed
        procedure,public :: print_error_message => json_file_print_error_message
        procedure,public :: check_for_errors => json_file_check_for_errors
        procedure,public :: clear_exceptions => json_file_clear_exceptions

        procedure,public :: print_to_string => json_file_print_to_string

        generic,public :: print_file => json_file_print_to_console, &
                                        json_file_print_1, &
                                        json_file_print_2

        !>
        !  Rename a variable, specifying it by path
        generic,public :: rename => MAYBEWRAP(json_file_rename)
#ifdef USE_UCS4
        generic,public :: rename => json_file_rename_path_ascii, &
                                    json_file_rename_name_ascii
#endif

        !>
        !  Verify that a path is valid
        !  (i.e., a variable with this path exists in the file).
        generic,public :: valid_path => MAYBEWRAP(json_file_valid_path)

        !>
        !  Get a variable from a [[json_file(type)]], by specifying the path.
        generic,public :: get => MAYBEWRAP(json_file_get_object),      &
                                 MAYBEWRAP(json_file_get_integer),     &
                                 MAYBEWRAP(json_file_get_double),      &
                                 MAYBEWRAP(json_file_get_logical),     &
                                 MAYBEWRAP(json_file_get_string),      &
                                 MAYBEWRAP(json_file_get_integer_vec), &
                                 MAYBEWRAP(json_file_get_double_vec),  &
                                 MAYBEWRAP(json_file_get_logical_vec), &
                                 MAYBEWRAP(json_file_get_string_vec),  &
                                 MAYBEWRAP(json_file_get_alloc_string_vec),  &
                                 json_file_get_root

        !>
        !  Add a variable to a [[json_file(type)]], by specifying the path.
        !
        !### Example
        !
        !```fortran
        !  program test
        !  use json_module, rk=>json_rk, ik=>json_ik
        !  implicit none
        !  type(json_file) :: f
        !  call f%initialize()  ! specify whatever init options you want.
        !  call f%add('inputs.t', 0.0_rk)
        !  call f%add('inputs.x', [1.0_rk,2.0_rk,3.0_rk])
        !  call f%add('inputs.flag', .true.)
        !  call f%print_file()
        !  end program test
        !```
        generic,public :: add => MAYBEWRAP(json_file_add_object),      &
                                 MAYBEWRAP(json_file_add_integer),     &
                                 MAYBEWRAP(json_file_add_double),      &
                                 MAYBEWRAP(json_file_add_logical),     &
                                 MAYBEWRAP(json_file_add_string),      &
                                 MAYBEWRAP(json_file_add_integer_vec), &
                                 MAYBEWRAP(json_file_add_double_vec),  &
                                 MAYBEWRAP(json_file_add_logical_vec), &
                                 MAYBEWRAP(json_file_add_string_vec)
#ifdef USE_UCS4
        generic,public :: add => json_file_add_string_path_ascii, &
                                 json_file_add_string_value_ascii,&
                                 json_file_add_string_vec_path_ascii,&
                                 json_file_add_string_vec_vec_ascii
#endif

        !>
        !  Update a scalar variable in a [[json_file(type)]],
        !  by specifying the path.
        !
        !@note These have been mostly supplanted by the `add`
        !      methods, which do a similar thing (and can be used for
        !      scalars and vectors, etc.)
        generic,public :: update =>  MAYBEWRAP(json_file_update_integer),  &
                                     MAYBEWRAP(json_file_update_logical),  &
                                     MAYBEWRAP(json_file_update_real),     &
                                     MAYBEWRAP(json_file_update_string)
#ifdef USE_UCS4
        generic,public :: update => json_file_update_string_name_ascii, &
                                    json_file_update_string_val_ascii
#endif

        !>
        !  Remove a variable from a [[json_file(type)]]
        !  by specifying the path.
        generic,public :: remove =>  MAYBEWRAP(json_file_remove)

        !traverse
        procedure,public :: traverse => json_file_traverse

        ! ***************************************************
        ! operators
        ! ***************************************************

        generic,public :: operator(.in.) => MAYBEWRAP(json_file_valid_path_op)
        procedure,pass(me) :: MAYBEWRAP(json_file_valid_path_op)

        ! ***************************************************
        ! private routines
        ! ***************************************************

        !load from string:
        procedure :: MAYBEWRAP(json_file_load_from_string)

        !initialize
        procedure :: initialize_json_core_in_file
        procedure :: set_json_core_in_file

        !get info:
        procedure :: MAYBEWRAP(json_file_variable_info)
        procedure :: MAYBEWRAP(json_file_variable_matrix_info)

        !rename:
        procedure :: MAYBEWRAP(json_file_rename)
#ifdef USE_UCS4
        procedure :: json_file_rename_path_ascii
        procedure :: json_file_rename_name_ascii
#endif

        !validate path:
        procedure :: MAYBEWRAP(json_file_valid_path)

        !get:
        procedure :: MAYBEWRAP(json_file_get_object)
        procedure :: MAYBEWRAP(json_file_get_integer)
        procedure :: MAYBEWRAP(json_file_get_double)
        procedure :: MAYBEWRAP(json_file_get_logical)
        procedure :: MAYBEWRAP(json_file_get_string)
        procedure :: MAYBEWRAP(json_file_get_integer_vec)
        procedure :: MAYBEWRAP(json_file_get_double_vec)
        procedure :: MAYBEWRAP(json_file_get_logical_vec)
        procedure :: MAYBEWRAP(json_file_get_string_vec)
        procedure :: MAYBEWRAP(json_file_get_alloc_string_vec)
        procedure :: json_file_get_root

        !add:
        procedure :: MAYBEWRAP(json_file_add_object)
        procedure :: MAYBEWRAP(json_file_add_integer)
        procedure :: MAYBEWRAP(json_file_add_double)
        procedure :: MAYBEWRAP(json_file_add_logical)
        procedure :: MAYBEWRAP(json_file_add_string)
        procedure :: MAYBEWRAP(json_file_add_integer_vec)
        procedure :: MAYBEWRAP(json_file_add_double_vec)
        procedure :: MAYBEWRAP(json_file_add_logical_vec)
        procedure :: MAYBEWRAP(json_file_add_string_vec)
#ifdef USE_UCS4
        procedure :: json_file_add_string_path_ascii
        procedure :: json_file_add_string_value_ascii
        procedure :: json_file_add_string_vec_path_ascii
        procedure :: json_file_add_string_vec_vec_ascii
#endif

        !update:
        procedure :: MAYBEWRAP(json_file_update_integer)
        procedure :: MAYBEWRAP(json_file_update_logical)
        procedure :: MAYBEWRAP(json_file_update_real)
        procedure :: MAYBEWRAP(json_file_update_string)
#ifdef USE_UCS4
        procedure :: json_file_update_string_name_ascii
        procedure :: json_file_update_string_val_ascii
#endif

        !remove:
        procedure :: MAYBEWRAP(json_file_remove)

        !print_file:
        procedure :: json_file_print_to_console
        procedure :: json_file_print_1
        procedure :: json_file_print_2

    end type json_file

Type	Intent	Optional	Attributes		Name
class(json_file),	intent(inout)			::	me
integer,	intent(in),	optional		::	io_unit

json_file Derived Type

Contents

Variables

Constructor

Type-Bound Procedures

Source Code

type, public :: json_file

Example

Warning

Inherits

Contents

Variables

Constructor

Type-Bound Procedures

Source Code

Components

Constructor

public interface json_file

Arguments

Return Value type(json_file)

private function initialize_json_file_v2(json_value_object, json_core_object) result(file_object)

Arguments

Return Value type(json_file)

Type-Bound Procedures

generic, public :: add => json_file_add_object, json_file_add_integer, json_file_add_double, json_file_add_logical, json_file_add_string, json_file_add_integer_vec, json_file_add_double_vec, json_file_add_logical_vec, json_file_add_string_vec

Example

private subroutine json_file_add_object(me, path, p, found, was_created)

Arguments

private subroutine json_file_add_integer(me, path, val, found, was_created)

Arguments

private subroutine json_file_add_double(me, path, val, found, was_created)

Arguments

private subroutine json_file_add_logical(me, path, val, found, was_created)

Arguments

private subroutine json_file_add_string(me, path, val, found, was_created, trim_str, adjustl_str)

Arguments

private subroutine json_file_add_integer_vec(me, path, vec, found, was_created)

Arguments

private subroutine json_file_add_double_vec(me, path, vec, found, was_created)

Arguments

private subroutine json_file_add_logical_vec(me, path, vec, found, was_created)

Arguments

private subroutine json_file_add_string_vec(me, path, vec, found, was_created, ilen, trim_str, adjustl_str)

Arguments

procedure, public :: check_for_errors => json_file_check_for_errors

private subroutine json_file_check_for_errors(me, status_ok, error_msg)

Arguments

procedure, public :: clear_exceptions => json_file_clear_exceptions

private pure subroutine json_file_clear_exceptions(me)

Arguments

procedure, public :: destroy => json_file_destroy

private subroutine json_file_destroy(me, destroy_core)

Arguments

procedure, public :: failed => json_file_failed

private pure function json_file_failed(me) result(failed)

Arguments

Return Value logical(kind=LK)

generic, public :: get => json_file_get_object, json_file_get_integer, json_file_get_double, json_file_get_logical, json_file_get_string, json_file_get_integer_vec, json_file_get_double_vec, json_file_get_logical_vec, json_file_get_string_vec, json_file_get_alloc_string_vec, json_file_get_root

private subroutine json_file_get_object(me, path, p, found)

Arguments

private subroutine json_file_get_integer(me, path, val, found)

Arguments

private subroutine json_file_get_double(me, path, val, found)

Arguments

private subroutine json_file_get_logical(me, path, val, found)

Arguments

private subroutine json_file_get_string(me, path, val, found)

Arguments

private subroutine json_file_get_integer_vec(me, path, vec, found)

Arguments

private subroutine json_file_get_double_vec(me, path, vec, found)

Arguments

private subroutine json_file_get_logical_vec(me, path, vec, found)

Arguments

private subroutine json_file_get_string_vec(me, path, vec, found)

Arguments

private subroutine json_file_get_alloc_string_vec(me, path, vec, ilen, found)

Arguments

private subroutine json_file_get_root(me, p)

Arguments