forked from KolibriOS/kolibrios
284 lines
6.3 KiB
C
284 lines
6.3 KiB
C
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/* vim: set et ts=3 sw=3 sts=3 ft=c:
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*
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* Copyright (C) 2012, 2013, 2014 James McLaughlin et al. All rights reserved.
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* https://github.com/udp/json-parser
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _JSON_H
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#define _JSON_H
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#ifndef json_char
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#define json_char char
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#endif
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#ifndef json_int_t
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#ifndef _MSC_VER
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#include "inttypes.h"
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#define json_int_t int64_t
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#else
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#define json_int_t __int64
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#endif
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#endif
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#include <stdlib.h>
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#ifdef __cplusplus
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#include <string.h>
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extern "C"
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{
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#endif
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typedef struct
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{
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unsigned long max_memory;
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int settings;
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/* Custom allocator support (leave null to use malloc/free)
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*/
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void * (* mem_alloc) (size_t, int zero, void * user_data);
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void (* mem_free) (void *, void * user_data);
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void * user_data; /* will be passed to mem_alloc and mem_free */
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size_t value_extra; /* how much extra space to allocate for values? */
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} json_settings;
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#define json_enable_comments 0x01
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typedef enum
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{
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json_none,
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json_object,
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json_array,
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json_integer,
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json_double,
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json_string,
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json_boolean,
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json_null
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} json_type;
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extern const struct _json_value json_value_none;
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typedef struct _json_object_entry
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{
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json_char * name;
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unsigned int name_length;
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struct _json_value * value;
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} json_object_entry;
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typedef struct _json_value
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{
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struct _json_value * parent;
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json_type type;
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union
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{
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int boolean;
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json_int_t integer;
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double dbl;
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struct
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{
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unsigned int length;
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json_char * ptr; /* null terminated */
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} string;
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struct
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{
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unsigned int length;
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json_object_entry * values;
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#if defined(__cplusplus) && __cplusplus >= 201103L
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decltype(values) begin () const
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{ return values;
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}
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decltype(values) end () const
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{ return values + length;
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}
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#endif
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} object;
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struct
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{
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unsigned int length;
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struct _json_value ** values;
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#if defined(__cplusplus) && __cplusplus >= 201103L
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decltype(values) begin () const
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{ return values;
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}
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decltype(values) end () const
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{ return values + length;
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}
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#endif
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} array;
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} u;
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union
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{
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struct _json_value * next_alloc;
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void * object_mem;
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} _reserved;
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#ifdef JSON_TRACK_SOURCE
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/* Location of the value in the source JSON
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*/
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unsigned int line, col;
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#endif
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/* Some C++ operator sugar */
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#ifdef __cplusplus
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public:
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inline _json_value ()
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{ memset (this, 0, sizeof (_json_value));
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}
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inline const struct _json_value &operator [] (int index) const
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{
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if (type != json_array || index < 0
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|| ((unsigned int) index) >= u.array.length)
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{
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return json_value_none;
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}
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return *u.array.values [index];
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}
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inline const struct _json_value &operator [] (const char * index) const
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{
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if (type != json_object)
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return json_value_none;
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for (unsigned int i = 0; i < u.object.length; ++ i)
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if (!strcmp (u.object.values [i].name, index))
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return *u.object.values [i].value;
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return json_value_none;
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}
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inline operator const char * () const
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{
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switch (type)
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{
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case json_string:
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return u.string.ptr;
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default:
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return "";
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};
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}
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inline operator json_int_t () const
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{
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switch (type)
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{
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case json_integer:
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return u.integer;
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case json_double:
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return (json_int_t) u.dbl;
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default:
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return 0;
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};
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}
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inline operator bool () const
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{
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if (type != json_boolean)
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return false;
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return u.boolean != 0;
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}
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inline operator double () const
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{
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switch (type)
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{
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case json_integer:
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return (double) u.integer;
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case json_double:
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return u.dbl;
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default:
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return 0;
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};
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}
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#endif
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} json_value;
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json_value * json_parse (const json_char * json,
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size_t length);
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#define json_error_max 128
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json_value * json_parse_ex (json_settings * settings,
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const json_char * json,
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size_t length,
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char * error);
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void json_value_free (json_value *);
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/* Not usually necessary, unless you used a custom mem_alloc and now want to
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* use a custom mem_free.
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*/
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void json_value_free_ex (json_settings * settings,
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json_value *);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif
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