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json_file_module.F90
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!*****************************************************************************************
!> author: Jacob Williams
! license: BSD
!
! Higher-level [[json_file]] interface for the [[json_value]] type.
!
!### 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_file_module
use,intrinsic :: iso_fortran_env
use json_kinds
use json_parameters, only: unit2str
use json_string_utilities
use json_value_module
implicit none
private
#include "json_macros.inc"
!*********************************************************
!> author: Jacob Williams
! date: 12/9/2013
!
! 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(type)]],
! 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
!
!```fortran
! 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(filename='myfile.json')
! call json%print() !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
!```
!
!@note The `destroy()` method may be called to free the memory if necessary.
! [[json_file(type)]] includes a finalizer that also calls
! `destroy()` when the variable goes out of scope.
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
!>
! Load JSON from a file.
procedure,public :: load => json_file_load
!>
! The same as `load`, but only here for backward compatibility
procedure,public :: load_file => json_file_load
!>
! Load JSON from a string.
generic,public :: deserialize => MAYBEWRAP(json_file_load_from_string)
!>
! The same as `deserialize`, but only here for backward compatibility
generic,public :: load_from_string => MAYBEWRAP(json_file_load_from_string)
!>
! Print the [[json_value]] structure to an allocatable string
procedure,public :: serialize => json_file_print_to_string
!>
! The same as `serialize`, but only here for backward compatibility
procedure,public :: print_to_string => json_file_print_to_string
procedure,public :: destroy => json_file_destroy
procedure,public :: nullify => json_file_nullify
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
generic,public :: print => json_file_print_to_console, &
json_file_print_to_unit, &
json_file_print_to_filename
!>
! The same as `print`, but only here for backward compatibility
generic,public :: print_file => json_file_print_to_console, &
json_file_print_to_unit, &
json_file_print_to_filename
!>
! 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), &
#ifndef REAL32
MAYBEWRAP(json_file_get_real32), &
#endif
MAYBEWRAP(json_file_get_real), &
#ifdef REAL128
MAYBEWRAP(json_file_get_real64), &
#endif
MAYBEWRAP(json_file_get_logical), &
MAYBEWRAP(json_file_get_string), &
MAYBEWRAP(json_file_get_integer_vec), &
#ifndef REAL32
MAYBEWRAP(json_file_get_real32_vec), &
#endif
MAYBEWRAP(json_file_get_real_vec), &
#ifdef REAL128
MAYBEWRAP(json_file_get_real64_vec), &
#endif
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() ! print to the console
! end program test
!```
generic,public :: add => json_file_add, &
MAYBEWRAP(json_file_add_object), &
MAYBEWRAP(json_file_add_integer), &
#ifndef REAL32
MAYBEWRAP(json_file_add_real32), &
#endif
MAYBEWRAP(json_file_add_real), &
#ifdef REAL128
MAYBEWRAP(json_file_add_real64), &
#endif
MAYBEWRAP(json_file_add_logical), &
MAYBEWRAP(json_file_add_string), &
MAYBEWRAP(json_file_add_integer_vec), &
#ifndef REAL32
MAYBEWRAP(json_file_add_real32_vec), &
#endif
MAYBEWRAP(json_file_add_real_vec), &
#ifdef REAL128
MAYBEWRAP(json_file_add_real64_vec), &
#endif
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), &
#ifndef REAL32
MAYBEWRAP(json_file_update_real32), &
#endif
MAYBEWRAP(json_file_update_real), &
#ifdef REAL128
MAYBEWRAP(json_file_update_real64), &
#endif
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)
generic,public :: assignment(=) => assign_json_file
procedure :: assign_json_file
! ***************************************************
! 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)
#ifndef REAL32
procedure :: MAYBEWRAP(json_file_get_real32)
#endif
procedure :: MAYBEWRAP(json_file_get_real)
#ifdef REAL128
procedure :: MAYBEWRAP(json_file_get_real64)
#endif
procedure :: MAYBEWRAP(json_file_get_logical)
procedure :: MAYBEWRAP(json_file_get_string)
procedure :: MAYBEWRAP(json_file_get_integer_vec)
#ifndef REAL32
procedure :: MAYBEWRAP(json_file_get_real32_vec)
#endif
procedure :: MAYBEWRAP(json_file_get_real_vec)
#ifdef REAL128
procedure :: MAYBEWRAP(json_file_get_real64_vec)
#endif
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 :: json_file_add
procedure :: MAYBEWRAP(json_file_add_object)
procedure :: MAYBEWRAP(json_file_add_integer)
#ifndef REAL32
procedure :: MAYBEWRAP(json_file_add_real32)
#endif
procedure :: MAYBEWRAP(json_file_add_real)
#ifdef REAL128
procedure :: MAYBEWRAP(json_file_add_real64)
#endif
procedure :: MAYBEWRAP(json_file_add_logical)
procedure :: MAYBEWRAP(json_file_add_string)
procedure :: MAYBEWRAP(json_file_add_integer_vec)
#ifndef REAL32
procedure :: MAYBEWRAP(json_file_add_real32_vec)
#endif
procedure :: MAYBEWRAP(json_file_add_real_vec)
#ifdef REAL128
procedure :: MAYBEWRAP(json_file_add_real64_vec)
#endif
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)
#ifndef REAL32
procedure :: MAYBEWRAP(json_file_update_real32)
#endif
procedure :: MAYBEWRAP(json_file_update_real)
#ifdef REAL128
procedure :: MAYBEWRAP(json_file_update_real64)
#endif
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:
procedure :: json_file_print_to_console
procedure :: json_file_print_to_unit
procedure :: json_file_print_to_filename
final :: finalize_json_file
end type json_file
!*********************************************************
!*********************************************************
!> author: Izaak Beekman
! date: 07/23/2015
!
! Structure constructor to initialize a [[json_file(type)]]
! object with an existing [[json_value]] object or a JSON
! string, and either the [[json_core(type)]] settings or a
! [[json_core(type)]] instance.
!
!### Example
!
!```fortran
! ...
! type(json_file) :: my_file
! type(json_value),pointer :: json_object
! type(json_core) :: json_core_object
! ...
! ! Construct a json_object:
! !could do this:
! my_file = json_file(json_object)
! !or:
! my_file = json_file(json_object,verbose=.true.)
! !or:
! my_file = json_file('{"x": [1]}',verbose=.true.)
! !or:
! my_file = json_file(json_object,json_core_object)
! !or:
! my_file = json_file('{"x": [1]}',json_core_object)
!```
interface json_file
module procedure initialize_json_file, &
initialize_json_file_v2, &
MAYBEWRAP(initialize_json_file_from_string), &
MAYBEWRAP(initialize_json_file_from_string_v2)
end interface
!*************************************************************************************
contains
!*****************************************************************************************
!*****************************************************************************************
!>
! Finalizer for [[json_file]] class.
!
! Just a wrapper for [[json_file_destroy]].
subroutine finalize_json_file(me)
implicit none
type(json_file),intent(inout) :: me
call me%destroy(destroy_core=.true.)
end subroutine finalize_json_file
!*****************************************************************************************
!*****************************************************************************************
!>
! Check error status in the file.
pure function json_file_failed(me) result(failed)
implicit none
class(json_file),intent(in) :: me
logical(LK) :: failed !! will be true if there has been an error.
failed = me%core%failed()
end function json_file_failed
!*****************************************************************************************
!*****************************************************************************************
!>
! Retrieve error status and message from the class.
subroutine json_file_check_for_errors(me,status_ok,error_msg)
implicit none
class(json_file),intent(inout) :: me
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
!! (if there were errors)
#if defined __GFORTRAN__
character(kind=CK,len=:),allocatable :: tmp !! workaround for gfortran bugs
call me%core%check_for_errors(status_ok,tmp)
error_msg = tmp
#else
call me%core%check_for_errors(status_ok,error_msg)
#endif
end subroutine json_file_check_for_errors
!*****************************************************************************************
!*****************************************************************************************
!>
! Clear exceptions in the class.
pure subroutine json_file_clear_exceptions(me)
implicit none
class(json_file),intent(inout) :: me
call me%core%clear_exceptions()
end subroutine json_file_clear_exceptions
!*****************************************************************************************
!*****************************************************************************************
!>
! This is a wrapper for [[json_print_error_message]].
subroutine json_file_print_error_message(me,io_unit)
implicit none
class(json_file),intent(inout) :: me
integer, intent(in), optional :: io_unit
call me%core%print_error_message(io_unit)
end subroutine json_file_print_error_message
!*****************************************************************************************
!*****************************************************************************************
!>
! Initialize the [[json_core(type)]] for this [[json_file]].
! This is just a wrapper for [[json_initialize]].
!
!@note This does not destroy the data in the file.
!
!@note [[initialize_json_core]], [[json_initialize]],
! [[initialize_json_core_in_file]], [[initialize_json_file]],
! [[initialize_json_file_v2]], [[initialize_json_file_from_string]],
! and [[initialize_json_file_from_string_v2]]
! all have a similar interface.
subroutine initialize_json_core_in_file(me,&
#include "json_initialize_dummy_arguments.inc"
)
implicit none
class(json_file),intent(inout) :: me
#include "json_initialize_arguments.inc"
call me%core%initialize(&
#include "json_initialize_dummy_arguments.inc"
)
end subroutine initialize_json_core_in_file
!*****************************************************************************************
!*****************************************************************************************
!>
! Set the [[json_core(type)]] for this [[json_file]].
!
!@note This does not destroy the data in the file.
!
!@note This one is used if you want to initialize the file with
! an already-existing [[json_core(type)]] (presumably, this was already
! initialized by a call to [[initialize_json_core]] or similar).
subroutine set_json_core_in_file(me,core)
implicit none
class(json_file),intent(inout) :: me
type(json_core),intent(in) :: core
me%core = core
end subroutine set_json_core_in_file
!*****************************************************************************************
!*****************************************************************************************
!>
! Get a copy of the [[json_core(type)]] in this [[json_file]].
subroutine get_json_core_in_file(me,core)
implicit none
class(json_file),intent(in) :: me
type(json_core),intent(out) :: core
core = me%core
end subroutine get_json_core_in_file
!*****************************************************************************************
!*****************************************************************************************
!> author: Izaak Beekman
! date: 07/23/2015
!
! Cast a [[json_value]] object as a [[json_file(type)]] object.
! It also calls the `initialize()` method.
!
!@note [[initialize_json_core]], [[json_initialize]],
! [[initialize_json_core_in_file]], [[initialize_json_file]],
! [[initialize_json_file_v2]], [[initialize_json_file_from_string]],
! and [[initialize_json_file_from_string_v2]]
! all have a similar interface.
function initialize_json_file(p,&
#include "json_initialize_dummy_arguments.inc"
) result(file_object)
implicit none
type(json_file) :: file_object
type(json_value),pointer,optional :: p !! `json_value` object to cast
!! as a `json_file` object. This
!! will be nullified.
#include "json_initialize_arguments.inc"
call file_object%initialize(&
#include "json_initialize_dummy_arguments.inc"
)
if (present(p)) then
file_object%p => p
! we have to nullify it to avoid
! a dangling pointer when the file
! goes out of scope
nullify(p)
end if
end function initialize_json_file
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 4/26/2016
!
! Cast a [[json_value]] pointer and a [[json_core(type)]] object
! as a [[json_file(type)]] object.
function initialize_json_file_v2(json_value_object,json_core_object) &
result(file_object)
implicit none
type(json_file) :: file_object
type(json_value),pointer,intent(in) :: json_value_object
type(json_core),intent(in) :: json_core_object
file_object%p => json_value_object
file_object%core = json_core_object
end function initialize_json_file_v2
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 01/19/2019
!
! Cast a JSON string as a [[json_file(type)]] object.
! It also calls the `initialize()` method.
!
!### Example
!
!```fortran
! type(json_file) :: f
! f = json_file('{"key ": 1}', trailing_spaces_significant=.true.)
!```
!
!@note [[initialize_json_core]], [[json_initialize]],
! [[initialize_json_core_in_file]], [[initialize_json_file]],
! [[initialize_json_file_v2]], [[initialize_json_file_from_string]],
! and [[initialize_json_file_from_string_v2]]
! all have a similar interface.
function initialize_json_file_from_string(str,&
#include "json_initialize_dummy_arguments.inc"
) result(file_object)
implicit none
type(json_file) :: file_object
character(kind=CK,len=*),intent(in) :: str !! string to load JSON data from
#include "json_initialize_arguments.inc"
call file_object%initialize(&
#include "json_initialize_dummy_arguments.inc"
)
call file_object%deserialize(str)
end function initialize_json_file_from_string
!*****************************************************************************************
!*****************************************************************************************
!>
! Alternate version of [[initialize_json_file_from_string]], where "str" is kind=CDK.
function wrap_initialize_json_file_from_string(str,&
#include "json_initialize_dummy_arguments.inc"
) result(file_object)
implicit none
type(json_file) :: file_object
character(kind=CDK,len=*),intent(in) :: str !! string to load JSON data from
#include "json_initialize_arguments.inc"
file_object = initialize_json_file_from_string(&
to_unicode(str),&
#include "json_initialize_dummy_arguments.inc"
)
end function wrap_initialize_json_file_from_string
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 1/19/2019
!
! Cast a JSON string and a [[json_core(type)]] object
! as a [[json_file(type)]] object.
function initialize_json_file_from_string_v2(str, json_core_object) &
result(file_object)
implicit none
type(json_file) :: file_object
character(kind=CK,len=*),intent(in) :: str !! string to load JSON data from
type(json_core),intent(in) :: json_core_object
file_object%core = json_core_object
call file_object%deserialize(str)
end function initialize_json_file_from_string_v2
!*****************************************************************************************
!*****************************************************************************************
!>
! Alternate version of [[initialize_json_file_from_string_v2]], where "str" is kind=CDK.
function wrap_initialize_json_file_from_string_v2(str,json_core_object) &
result(file_object)
implicit none
type(json_file) :: file_object
character(kind=CDK,len=*),intent(in) :: str !! string to load JSON data from
type(json_core),intent(in) :: json_core_object
file_object = initialize_json_file_from_string_v2(to_unicode(str),json_core_object)
end function wrap_initialize_json_file_from_string_v2
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
!
! Nullify the [[json_value]] pointer in a [[json_file(type)]],
! but do not destroy it.
!
! This should normally only be done if the pointer is the target of
! another pointer outside the class that is still intended to be in
! scope after the [[json_file(type)]] has gone out of scope.
! Otherwise, this would result in a memory leak.
!
!### See also
! * [[json_file_destroy]]
!
!### History
! * 6/30/2019 : Created
subroutine json_file_nullify(me)
implicit none
class(json_file),intent(inout) :: me
nullify(me%p)
end subroutine json_file_nullify
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
!
! Destroy the [[json_value]] data in a [[json_file(type)]].
! This may be done when the variable is no longer needed,
! or will be reused to open a different file.
! Otherwise a memory leak will occur.
!
! Optionally, also destroy the [[json_core(type)]] instance (this
! is not necessary to prevent memory leaks, since a [[json_core(type)]]
! does not use pointers).
!
!### See also
! * [[json_file_nullify]]
!
!### History
! * 12/9/2013 : Created
! * 4/26/2016 : Added optional `destroy_core` argument
!
!@note This routine will be called automatically when the variable
! goes out of scope.
subroutine json_file_destroy(me,destroy_core)
implicit none
class(json_file),intent(inout) :: me
logical,intent(in),optional :: destroy_core !! to also destroy the [[json_core(type)]].
!! default is to leave it as is.
if (associated(me%p)) call me%core%destroy(me%p)
if (present(destroy_core)) then
if (destroy_core) call me%core%destroy()
end if
end subroutine json_file_destroy
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 12/5/2014
!
! Move the [[json_value]] pointer from one [[json_file(type)]] to another.
! The "from" pointer is then nullified, but not destroyed.
!
!@note If "from%p" is not associated, then an error is thrown.
subroutine json_file_move_pointer(to,from)
implicit none
class(json_file),intent(inout) :: to
class(json_file),intent(inout) :: from
if (associated(from%p)) then
if (from%failed()) then
!Don't get the data if the FROM file has an
!active exception, since it may not be valid.
call to%core%throw_exception('Error in json_file_move_pointer: '//&
'error exception in FROM file.')
else
call to%initialize() !initialize and clear any exceptions that may be present
to%p => from%p
nullify(from%p)
end if
else
call to%core%throw_exception('Error in json_file_move_pointer: '//&
'pointer is not associated.')
end if
end subroutine json_file_move_pointer
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 12/9/2013
!
! Load the JSON data from a file.
!
!### Example
!
!```fortran
! program main
! use json_module
! implicit none
! type(json_file) :: f
! call f%load('my_file.json')
! !...
! call f%destroy()
! end program main
!```
subroutine json_file_load(me, filename, unit)
implicit none
class(json_file),intent(inout) :: me
character(kind=CDK,len=*),intent(in) :: filename !! the filename to open
integer(IK),intent(in),optional :: unit !! the unit number to use
!! (if not present, a newunit
!! is used)
call me%core%load(file=filename, p=me%p, unit=unit)
end subroutine json_file_load
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 1/13/2015
!
! Load the JSON data from a string.
!
!### Example
!
! Load JSON from a string:
!```fortran
! type(json_file) :: f
! call f%deserialize('{ "name": "Leonidas" }')
!```
subroutine json_file_load_from_string(me, str)
implicit none
class(json_file),intent(inout) :: me
character(kind=CK,len=*),intent(in) :: str !! string to load JSON data from
call me%core%deserialize(me%p, str)
end subroutine json_file_load_from_string
!*****************************************************************************************
!*****************************************************************************************
!>
! Alternate version of [[json_file_load_from_string]], where "str" is kind=CDK.
subroutine wrap_json_file_load_from_string(me, str)
implicit none
class(json_file),intent(inout) :: me
character(kind=CDK,len=*),intent(in) :: str
call me%deserialize(to_unicode(str))
end subroutine wrap_json_file_load_from_string
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 1/11/2015
!
! Print the JSON file to the console.
subroutine json_file_print_to_console(me)
implicit none
class(json_file),intent(inout) :: me
call me%core%print(me%p,iunit=int(output_unit,IK))
end subroutine json_file_print_to_console
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 12/9/2013
!
! Prints the JSON file to the specified file unit number.
subroutine json_file_print_to_unit(me, iunit)
implicit none
class(json_file),intent(inout) :: me
integer(IK),intent(in) :: iunit !! file unit number (must not be -1)
if (iunit/=unit2str) then
call me%core%print(me%p,iunit=iunit)
else
call me%core%throw_exception('Error in json_file_print_to_unit: iunit must not be -1.')
end if
end subroutine json_file_print_to_unit
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 1/11/2015
!
! Print the JSON structure to the specified filename.
! The file is opened, printed, and then closed.
!
!### Example
! Example loading a JSON file, changing a value, and then printing
! result to a new file:
!```fortran
! type(json_file) :: f
! logical :: found
! call f%load('my_file.json') !open the original file
! call f%update('version',4,found) !change the value of a variable
! call f%print('my_file_2.json') !save file as new name
!```
subroutine json_file_print_to_filename(me,filename)
implicit none
class(json_file),intent(inout) :: me
character(kind=CDK,len=*),intent(in) :: filename !! filename to print to
call me%core%print(me%p,filename)
end subroutine json_file_print_to_filename
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 1/11/2015
!
! Print the JSON file to a string.
!
!### Example
!
! Open a JSON file, and then print the contents to a string:
!```fortran
! type(json_file) :: f
! character(kind=CK,len=:),allocatable :: str
! call f%load('my_file.json')
! call f%serialize(str)
!```
subroutine json_file_print_to_string(me,str)
implicit none
class(json_file),intent(inout) :: me
character(kind=CK,len=:),allocatable,intent(out) :: str !! string to print JSON data to
call me%core%serialize(me%p,str)
end subroutine json_file_print_to_string
!*****************************************************************************************
!*****************************************************************************************
!> author: Jacob Williams
! date: 2/3/2014
!
! Returns information about a variable in a [[json_file(type)]].
!
!@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.