1012 lines
29 KiB
C
1012 lines
29 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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#include "json.h"
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#ifdef _MSC_VER
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#ifndef _CRT_SECURE_NO_WARNINGS
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#define _CRT_SECURE_NO_WARNINGS
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#endif
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#endif
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const struct _json_value json_value_none;
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <math.h>
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typedef unsigned int json_uchar;
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static unsigned char hex_value (json_char c)
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{
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if (isdigit(c))
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return c - '0';
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switch (c) {
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case 'a': case 'A': return 0x0A;
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case 'b': case 'B': return 0x0B;
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case 'c': case 'C': return 0x0C;
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case 'd': case 'D': return 0x0D;
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case 'e': case 'E': return 0x0E;
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case 'f': case 'F': return 0x0F;
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default: return 0xFF;
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}
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}
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typedef struct
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{
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unsigned long used_memory;
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unsigned int uint_max;
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unsigned long ulong_max;
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json_settings settings;
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int first_pass;
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const json_char * ptr;
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unsigned int cur_line, cur_col;
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} json_state;
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static void * default_alloc (size_t size, int zero, void * user_data)
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{
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return zero ? calloc (1, size) : malloc (size);
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}
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static void default_free (void * ptr, void * user_data)
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{
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free (ptr);
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}
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static void * json_alloc (json_state * state, unsigned long size, int zero)
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{
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if ((state->ulong_max - state->used_memory) < size)
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return 0;
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if (state->settings.max_memory
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&& (state->used_memory += size) > state->settings.max_memory)
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{
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return 0;
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}
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return state->settings.mem_alloc (size, zero, state->settings.user_data);
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}
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static int new_value (json_state * state,
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json_value ** top, json_value ** root, json_value ** alloc,
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json_type type)
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{
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json_value * value;
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int values_size;
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if (!state->first_pass)
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{
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value = *top = *alloc;
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*alloc = (*alloc)->_reserved.next_alloc;
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if (!*root)
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*root = value;
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switch (value->type)
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{
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case json_array:
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if (value->u.array.length == 0)
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break;
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if (! (value->u.array.values = (json_value **) json_alloc
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(state, value->u.array.length * sizeof (json_value *), 0)) )
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{
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return 0;
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}
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value->u.array.length = 0;
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break;
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case json_object:
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if (value->u.object.length == 0)
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break;
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values_size = sizeof (*value->u.object.values) * value->u.object.length;
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if (! (value->u.object.values = (json_object_entry *) json_alloc
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(state, values_size + ((unsigned long) value->u.object.values), 0)) )
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{
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return 0;
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}
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value->_reserved.object_mem = (*(char **) &value->u.object.values) + values_size;
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value->u.object.length = 0;
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break;
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case json_string:
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if (! (value->u.string.ptr = (json_char *) json_alloc
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(state, (value->u.string.length + 1) * sizeof (json_char), 0)) )
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{
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return 0;
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}
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value->u.string.length = 0;
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break;
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default:
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break;
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};
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return 1;
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}
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if (! (value = (json_value *) json_alloc
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(state, sizeof (json_value) + state->settings.value_extra, 1)))
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{
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return 0;
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}
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if (!*root)
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*root = value;
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value->type = type;
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value->parent = *top;
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#ifdef JSON_TRACK_SOURCE
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value->line = state->cur_line;
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value->col = state->cur_col;
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#endif
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if (*alloc)
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(*alloc)->_reserved.next_alloc = value;
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*alloc = *top = value;
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return 1;
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}
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#define whitespace \
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case '\n': ++ state.cur_line; state.cur_col = 0; \
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case ' ': case '\t': case '\r'
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#define string_add(b) \
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do { if (!state.first_pass) string [string_length] = b; ++ string_length; } while (0);
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#define line_and_col \
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state.cur_line, state.cur_col
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static const long
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flag_next = 1 << 0,
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flag_reproc = 1 << 1,
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flag_need_comma = 1 << 2,
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flag_seek_value = 1 << 3,
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flag_escaped = 1 << 4,
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flag_string = 1 << 5,
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flag_need_colon = 1 << 6,
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flag_done = 1 << 7,
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flag_num_negative = 1 << 8,
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flag_num_zero = 1 << 9,
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flag_num_e = 1 << 10,
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flag_num_e_got_sign = 1 << 11,
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flag_num_e_negative = 1 << 12,
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flag_line_comment = 1 << 13,
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flag_block_comment = 1 << 14;
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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_buf)
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{
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json_char error [json_error_max];
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const json_char * end;
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json_value * top, * root, * alloc = 0;
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json_state state = { 0 };
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long flags;
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long num_digits = 0, num_e = 0;
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json_int_t num_fraction = 0;
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/* Skip UTF-8 BOM
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*/
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if (length >= 3 && ((unsigned char) json [0]) == 0xEF
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&& ((unsigned char) json [1]) == 0xBB
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&& ((unsigned char) json [2]) == 0xBF)
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{
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json += 3;
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length -= 3;
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}
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error[0] = '\0';
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end = (json + length);
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memcpy (&state.settings, settings, sizeof (json_settings));
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if (!state.settings.mem_alloc)
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state.settings.mem_alloc = default_alloc;
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if (!state.settings.mem_free)
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state.settings.mem_free = default_free;
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memset (&state.uint_max, 0xFF, sizeof (state.uint_max));
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memset (&state.ulong_max, 0xFF, sizeof (state.ulong_max));
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state.uint_max -= 8; /* limit of how much can be added before next check */
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state.ulong_max -= 8;
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for (state.first_pass = 1; state.first_pass >= 0; -- state.first_pass)
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{
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json_uchar uchar;
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unsigned char uc_b1, uc_b2, uc_b3, uc_b4;
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json_char * string = 0;
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unsigned int string_length = 0;
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top = root = 0;
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flags = flag_seek_value;
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state.cur_line = 1;
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for (state.ptr = json ;; ++ state.ptr)
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{
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json_char b = (state.ptr == end ? 0 : *state.ptr);
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|
|
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if (flags & flag_string)
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{
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if (!b)
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{ sprintf (error, "Unexpected EOF in string (at %d:%d)", line_and_col);
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goto e_failed;
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}
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if (string_length > state.uint_max)
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goto e_overflow;
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if (flags & flag_escaped)
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{
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flags &= ~ flag_escaped;
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|
|
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switch (b)
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{
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case 'b': string_add ('\b'); break;
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case 'f': string_add ('\f'); break;
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case 'n': string_add ('\n'); break;
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case 'r': string_add ('\r'); break;
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case 't': string_add ('\t'); break;
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case 'u':
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|
|
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if (end - state.ptr < 4 ||
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(uc_b1 = hex_value (*++ state.ptr)) == 0xFF ||
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(uc_b2 = hex_value (*++ state.ptr)) == 0xFF ||
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(uc_b3 = hex_value (*++ state.ptr)) == 0xFF ||
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(uc_b4 = hex_value (*++ state.ptr)) == 0xFF)
|
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{
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sprintf (error, "Invalid character value `%c` (at %d:%d)", b, line_and_col);
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goto e_failed;
|
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}
|
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|
|
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uc_b1 = (uc_b1 << 4) | uc_b2;
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uc_b2 = (uc_b3 << 4) | uc_b4;
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uchar = (uc_b1 << 8) | uc_b2;
|
||
|
|
|
||
|
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if ((uchar & 0xF800) == 0xD800) {
|
||
|
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json_uchar uchar2;
|
||
|
|
|
||
|
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if (end - state.ptr < 6 || (*++ state.ptr) != '\\' || (*++ state.ptr) != 'u' ||
|
||
|
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(uc_b1 = hex_value (*++ state.ptr)) == 0xFF ||
|
||
|
|
(uc_b2 = hex_value (*++ state.ptr)) == 0xFF ||
|
||
|
|
(uc_b3 = hex_value (*++ state.ptr)) == 0xFF ||
|
||
|
|
(uc_b4 = hex_value (*++ state.ptr)) == 0xFF)
|
||
|
|
{
|
||
|
|
sprintf (error, "Invalid character value `%c` (at %d:%d)", b, line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
uc_b1 = (uc_b1 << 4) | uc_b2;
|
||
|
|
uc_b2 = (uc_b3 << 4) | uc_b4;
|
||
|
|
uchar2 = (uc_b1 << 8) | uc_b2;
|
||
|
|
|
||
|
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uchar = 0x010000 | ((uchar & 0x3FF) << 10) | (uchar2 & 0x3FF);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sizeof (json_char) >= sizeof (json_uchar) || (uchar <= 0x7F))
|
||
|
|
{
|
||
|
|
string_add ((json_char) uchar);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (uchar <= 0x7FF)
|
||
|
|
{
|
||
|
|
if (state.first_pass)
|
||
|
|
string_length += 2;
|
||
|
|
else
|
||
|
|
{ string [string_length ++] = 0xC0 | (uchar >> 6);
|
||
|
|
string [string_length ++] = 0x80 | (uchar & 0x3F);
|
||
|
|
}
|
||
|
|
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (uchar <= 0xFFFF) {
|
||
|
|
if (state.first_pass)
|
||
|
|
string_length += 3;
|
||
|
|
else
|
||
|
|
{ string [string_length ++] = 0xE0 | (uchar >> 12);
|
||
|
|
string [string_length ++] = 0x80 | ((uchar >> 6) & 0x3F);
|
||
|
|
string [string_length ++] = 0x80 | (uchar & 0x3F);
|
||
|
|
}
|
||
|
|
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (state.first_pass)
|
||
|
|
string_length += 4;
|
||
|
|
else
|
||
|
|
{ string [string_length ++] = 0xF0 | (uchar >> 18);
|
||
|
|
string [string_length ++] = 0x80 | ((uchar >> 12) & 0x3F);
|
||
|
|
string [string_length ++] = 0x80 | ((uchar >> 6) & 0x3F);
|
||
|
|
string [string_length ++] = 0x80 | (uchar & 0x3F);
|
||
|
|
}
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
string_add (b);
|
||
|
|
};
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (b == '\\')
|
||
|
|
{
|
||
|
|
flags |= flag_escaped;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (b == '"')
|
||
|
|
{
|
||
|
|
if (!state.first_pass)
|
||
|
|
string [string_length] = 0;
|
||
|
|
|
||
|
|
flags &= ~ flag_string;
|
||
|
|
string = 0;
|
||
|
|
|
||
|
|
switch (top->type)
|
||
|
|
{
|
||
|
|
case json_string:
|
||
|
|
|
||
|
|
top->u.string.length = string_length;
|
||
|
|
flags |= flag_next;
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
case json_object:
|
||
|
|
|
||
|
|
if (state.first_pass)
|
||
|
|
(*(json_char **) &top->u.object.values) += string_length + 1;
|
||
|
|
else
|
||
|
|
{
|
||
|
|
top->u.object.values [top->u.object.length].name
|
||
|
|
= (json_char *) top->_reserved.object_mem;
|
||
|
|
|
||
|
|
top->u.object.values [top->u.object.length].name_length
|
||
|
|
= string_length;
|
||
|
|
|
||
|
|
(*(json_char **) &top->_reserved.object_mem) += string_length + 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
flags |= flag_seek_value | flag_need_colon;
|
||
|
|
continue;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
string_add (b);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (state.settings.settings & json_enable_comments)
|
||
|
|
{
|
||
|
|
if (flags & (flag_line_comment | flag_block_comment))
|
||
|
|
{
|
||
|
|
if (flags & flag_line_comment)
|
||
|
|
{
|
||
|
|
if (b == '\r' || b == '\n' || !b)
|
||
|
|
{
|
||
|
|
flags &= ~ flag_line_comment;
|
||
|
|
-- state.ptr; /* so null can be reproc'd */
|
||
|
|
}
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (flags & flag_block_comment)
|
||
|
|
{
|
||
|
|
if (!b)
|
||
|
|
{ sprintf (error, "%d:%d: Unexpected EOF in block comment", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (b == '*' && state.ptr < (end - 1) && state.ptr [1] == '/')
|
||
|
|
{
|
||
|
|
flags &= ~ flag_block_comment;
|
||
|
|
++ state.ptr; /* skip closing sequence */
|
||
|
|
}
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (b == '/')
|
||
|
|
{
|
||
|
|
if (! (flags & (flag_seek_value | flag_done)) && top->type != json_object)
|
||
|
|
{ sprintf (error, "%d:%d: Comment not allowed here", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (++ state.ptr == end)
|
||
|
|
{ sprintf (error, "%d:%d: EOF unexpected", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (b = *state.ptr)
|
||
|
|
{
|
||
|
|
case '/':
|
||
|
|
flags |= flag_line_comment;
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case '*':
|
||
|
|
flags |= flag_block_comment;
|
||
|
|
continue;
|
||
|
|
|
||
|
|
default:
|
||
|
|
sprintf (error, "%d:%d: Unexpected `%c` in comment opening sequence", line_and_col, b);
|
||
|
|
goto e_failed;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (flags & flag_done)
|
||
|
|
{
|
||
|
|
if (!b)
|
||
|
|
break;
|
||
|
|
|
||
|
|
switch (b)
|
||
|
|
{
|
||
|
|
whitespace:
|
||
|
|
continue;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
sprintf (error, "%d:%d: Trailing garbage: `%c`",
|
||
|
|
state.cur_line, state.cur_col, b);
|
||
|
|
|
||
|
|
goto e_failed;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
if (flags & flag_seek_value)
|
||
|
|
{
|
||
|
|
switch (b)
|
||
|
|
{
|
||
|
|
whitespace:
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case ']':
|
||
|
|
|
||
|
|
if (top && top->type == json_array)
|
||
|
|
flags = (flags & ~ (flag_need_comma | flag_seek_value)) | flag_next;
|
||
|
|
else
|
||
|
|
{ sprintf (error, "%d:%d: Unexpected ]", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
if (flags & flag_need_comma)
|
||
|
|
{
|
||
|
|
if (b == ',')
|
||
|
|
{ flags &= ~ flag_need_comma;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
sprintf (error, "%d:%d: Expected , before %c",
|
||
|
|
state.cur_line, state.cur_col, b);
|
||
|
|
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (flags & flag_need_colon)
|
||
|
|
{
|
||
|
|
if (b == ':')
|
||
|
|
{ flags &= ~ flag_need_colon;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
sprintf (error, "%d:%d: Expected : before %c",
|
||
|
|
state.cur_line, state.cur_col, b);
|
||
|
|
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
flags &= ~ flag_seek_value;
|
||
|
|
|
||
|
|
switch (b)
|
||
|
|
{
|
||
|
|
case '{':
|
||
|
|
|
||
|
|
if (!new_value (&state, &top, &root, &alloc, json_object))
|
||
|
|
goto e_alloc_failure;
|
||
|
|
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case '[':
|
||
|
|
|
||
|
|
if (!new_value (&state, &top, &root, &alloc, json_array))
|
||
|
|
goto e_alloc_failure;
|
||
|
|
|
||
|
|
flags |= flag_seek_value;
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case '"':
|
||
|
|
|
||
|
|
if (!new_value (&state, &top, &root, &alloc, json_string))
|
||
|
|
goto e_alloc_failure;
|
||
|
|
|
||
|
|
flags |= flag_string;
|
||
|
|
|
||
|
|
string = top->u.string.ptr;
|
||
|
|
string_length = 0;
|
||
|
|
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case 't':
|
||
|
|
|
||
|
|
if ((end - state.ptr) < 3 || *(++ state.ptr) != 'r' ||
|
||
|
|
*(++ state.ptr) != 'u' || *(++ state.ptr) != 'e')
|
||
|
|
{
|
||
|
|
goto e_unknown_value;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!new_value (&state, &top, &root, &alloc, json_boolean))
|
||
|
|
goto e_alloc_failure;
|
||
|
|
|
||
|
|
top->u.boolean = 1;
|
||
|
|
|
||
|
|
flags |= flag_next;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'f':
|
||
|
|
|
||
|
|
if ((end - state.ptr) < 4 || *(++ state.ptr) != 'a' ||
|
||
|
|
*(++ state.ptr) != 'l' || *(++ state.ptr) != 's' ||
|
||
|
|
*(++ state.ptr) != 'e')
|
||
|
|
{
|
||
|
|
goto e_unknown_value;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!new_value (&state, &top, &root, &alloc, json_boolean))
|
||
|
|
goto e_alloc_failure;
|
||
|
|
|
||
|
|
flags |= flag_next;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'n':
|
||
|
|
|
||
|
|
if ((end - state.ptr) < 3 || *(++ state.ptr) != 'u' ||
|
||
|
|
*(++ state.ptr) != 'l' || *(++ state.ptr) != 'l')
|
||
|
|
{
|
||
|
|
goto e_unknown_value;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!new_value (&state, &top, &root, &alloc, json_null))
|
||
|
|
goto e_alloc_failure;
|
||
|
|
|
||
|
|
flags |= flag_next;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
if (isdigit (b) || b == '-')
|
||
|
|
{
|
||
|
|
if (!new_value (&state, &top, &root, &alloc, json_integer))
|
||
|
|
goto e_alloc_failure;
|
||
|
|
|
||
|
|
if (!state.first_pass)
|
||
|
|
{
|
||
|
|
while (isdigit (b) || b == '+' || b == '-'
|
||
|
|
|| b == 'e' || b == 'E' || b == '.')
|
||
|
|
{
|
||
|
|
if ( (++ state.ptr) == end)
|
||
|
|
{
|
||
|
|
b = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
b = *state.ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
flags |= flag_next | flag_reproc;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
flags &= ~ (flag_num_negative | flag_num_e |
|
||
|
|
flag_num_e_got_sign | flag_num_e_negative |
|
||
|
|
flag_num_zero);
|
||
|
|
|
||
|
|
num_digits = 0;
|
||
|
|
num_fraction = 0;
|
||
|
|
num_e = 0;
|
||
|
|
|
||
|
|
if (b != '-')
|
||
|
|
{
|
||
|
|
flags |= flag_reproc;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
flags |= flag_num_negative;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{ sprintf (error, "%d:%d: Unexpected %c when seeking value", line_and_col, b);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
};
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
switch (top->type)
|
||
|
|
{
|
||
|
|
case json_object:
|
||
|
|
|
||
|
|
switch (b)
|
||
|
|
{
|
||
|
|
whitespace:
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case '"':
|
||
|
|
|
||
|
|
if (flags & flag_need_comma)
|
||
|
|
{ sprintf (error, "%d:%d: Expected , before \"", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
flags |= flag_string;
|
||
|
|
|
||
|
|
string = (json_char *) top->_reserved.object_mem;
|
||
|
|
string_length = 0;
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
case '}':
|
||
|
|
|
||
|
|
flags = (flags & ~ flag_need_comma) | flag_next;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ',':
|
||
|
|
|
||
|
|
if (flags & flag_need_comma)
|
||
|
|
{
|
||
|
|
flags &= ~ flag_need_comma;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
default:
|
||
|
|
sprintf (error, "%d:%d: Unexpected `%c` in object", line_and_col, b);
|
||
|
|
goto e_failed;
|
||
|
|
};
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
case json_integer:
|
||
|
|
case json_double:
|
||
|
|
|
||
|
|
if (isdigit (b))
|
||
|
|
{
|
||
|
|
++ num_digits;
|
||
|
|
|
||
|
|
if (top->type == json_integer || flags & flag_num_e)
|
||
|
|
{
|
||
|
|
if (! (flags & flag_num_e))
|
||
|
|
{
|
||
|
|
if (flags & flag_num_zero)
|
||
|
|
{ sprintf (error, "%d:%d: Unexpected `0` before `%c`", line_and_col, b);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (num_digits == 1 && b == '0')
|
||
|
|
flags |= flag_num_zero;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
flags |= flag_num_e_got_sign;
|
||
|
|
num_e = (num_e * 10) + (b - '0');
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
top->u.integer = (top->u.integer * 10) + (b - '0');
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
num_fraction = (num_fraction * 10) + (b - '0');
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (b == '+' || b == '-')
|
||
|
|
{
|
||
|
|
if ( (flags & flag_num_e) && !(flags & flag_num_e_got_sign))
|
||
|
|
{
|
||
|
|
flags |= flag_num_e_got_sign;
|
||
|
|
|
||
|
|
if (b == '-')
|
||
|
|
flags |= flag_num_e_negative;
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (b == '.' && top->type == json_integer)
|
||
|
|
{
|
||
|
|
if (!num_digits)
|
||
|
|
{ sprintf (error, "%d:%d: Expected digit before `.`", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
top->type = json_double;
|
||
|
|
top->u.dbl = (double) top->u.integer;
|
||
|
|
|
||
|
|
num_digits = 0;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (! (flags & flag_num_e))
|
||
|
|
{
|
||
|
|
if (top->type == json_double)
|
||
|
|
{
|
||
|
|
if (!num_digits)
|
||
|
|
{ sprintf (error, "%d:%d: Expected digit after `.`", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
top->u.dbl += ((double) num_fraction) / (pow (10.0, (double) num_digits));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (b == 'e' || b == 'E')
|
||
|
|
{
|
||
|
|
flags |= flag_num_e;
|
||
|
|
|
||
|
|
if (top->type == json_integer)
|
||
|
|
{
|
||
|
|
top->type = json_double;
|
||
|
|
top->u.dbl = (double) top->u.integer;
|
||
|
|
}
|
||
|
|
|
||
|
|
num_digits = 0;
|
||
|
|
flags &= ~ flag_num_zero;
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (!num_digits)
|
||
|
|
{ sprintf (error, "%d:%d: Expected digit after `e`", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
}
|
||
|
|
|
||
|
|
top->u.dbl *= pow (10.0, (double)
|
||
|
|
(flags & flag_num_e_negative ? - num_e : num_e));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (flags & flag_num_negative)
|
||
|
|
{
|
||
|
|
if (top->type == json_integer)
|
||
|
|
top->u.integer = - top->u.integer;
|
||
|
|
else
|
||
|
|
top->u.dbl = - top->u.dbl;
|
||
|
|
}
|
||
|
|
|
||
|
|
flags |= flag_next | flag_reproc;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
if (flags & flag_reproc)
|
||
|
|
{
|
||
|
|
flags &= ~ flag_reproc;
|
||
|
|
-- state.ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (flags & flag_next)
|
||
|
|
{
|
||
|
|
flags = (flags & ~ flag_next) | flag_need_comma;
|
||
|
|
|
||
|
|
if (!top->parent)
|
||
|
|
{
|
||
|
|
/* root value done */
|
||
|
|
|
||
|
|
flags |= flag_done;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (top->parent->type == json_array)
|
||
|
|
flags |= flag_seek_value;
|
||
|
|
|
||
|
|
if (!state.first_pass)
|
||
|
|
{
|
||
|
|
json_value * parent = top->parent;
|
||
|
|
|
||
|
|
switch (parent->type)
|
||
|
|
{
|
||
|
|
case json_object:
|
||
|
|
|
||
|
|
parent->u.object.values
|
||
|
|
[parent->u.object.length].value = top;
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
case json_array:
|
||
|
|
|
||
|
|
parent->u.array.values
|
||
|
|
[parent->u.array.length] = top;
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( (++ top->parent->u.array.length) > state.uint_max)
|
||
|
|
goto e_overflow;
|
||
|
|
|
||
|
|
top = top->parent;
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
alloc = root;
|
||
|
|
}
|
||
|
|
|
||
|
|
return root;
|
||
|
|
|
||
|
|
e_unknown_value:
|
||
|
|
|
||
|
|
sprintf (error, "%d:%d: Unknown value", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
|
||
|
|
e_alloc_failure:
|
||
|
|
|
||
|
|
strcpy (error, "Memory allocation failure");
|
||
|
|
goto e_failed;
|
||
|
|
|
||
|
|
e_overflow:
|
||
|
|
|
||
|
|
sprintf (error, "%d:%d: Too long (caught overflow)", line_and_col);
|
||
|
|
goto e_failed;
|
||
|
|
|
||
|
|
e_failed:
|
||
|
|
|
||
|
|
if (error_buf)
|
||
|
|
{
|
||
|
|
if (*error)
|
||
|
|
strcpy (error_buf, error);
|
||
|
|
else
|
||
|
|
strcpy (error_buf, "Unknown error");
|
||
|
|
}
|
||
|
|
|
||
|
|
if (state.first_pass)
|
||
|
|
alloc = root;
|
||
|
|
|
||
|
|
while (alloc)
|
||
|
|
{
|
||
|
|
top = alloc->_reserved.next_alloc;
|
||
|
|
state.settings.mem_free (alloc, state.settings.user_data);
|
||
|
|
alloc = top;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!state.first_pass)
|
||
|
|
json_value_free_ex (&state.settings, root);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
json_value * json_parse (const json_char * json, size_t length)
|
||
|
|
{
|
||
|
|
json_settings settings = { 0 };
|
||
|
|
return json_parse_ex (&settings, json, length, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
void json_value_free_ex (json_settings * settings, json_value * value)
|
||
|
|
{
|
||
|
|
json_value * cur_value;
|
||
|
|
|
||
|
|
if (!value)
|
||
|
|
return;
|
||
|
|
|
||
|
|
value->parent = 0;
|
||
|
|
|
||
|
|
while (value)
|
||
|
|
{
|
||
|
|
switch (value->type)
|
||
|
|
{
|
||
|
|
case json_array:
|
||
|
|
|
||
|
|
if (!value->u.array.length)
|
||
|
|
{
|
||
|
|
settings->mem_free (value->u.array.values, settings->user_data);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
value = value->u.array.values [-- value->u.array.length];
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case json_object:
|
||
|
|
|
||
|
|
if (!value->u.object.length)
|
||
|
|
{
|
||
|
|
settings->mem_free (value->u.object.values, settings->user_data);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
value = value->u.object.values [-- value->u.object.length].value;
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case json_string:
|
||
|
|
|
||
|
|
settings->mem_free (value->u.string.ptr, settings->user_data);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
};
|
||
|
|
|
||
|
|
cur_value = value;
|
||
|
|
value = value->parent;
|
||
|
|
settings->mem_free (cur_value, settings->user_data);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void json_value_free (json_value * value)
|
||
|
|
{
|
||
|
|
json_settings settings = { 0 };
|
||
|
|
settings.mem_free = default_free;
|
||
|
|
json_value_free_ex (&settings, value);
|
||
|
|
}
|
||
|
|
|