mirror of
https://github.com/DaveGamble/cJSON.git
synced 2023-08-10 21:13:26 +03:00
1208 lines
36 KiB
C
1208 lines
36 KiB
C
/*
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Copyright (c) 2009 Dave Gamble
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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/* cJSON */
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/* JSON parser in C. */
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#include <string.h>
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#include <stdio.h>
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#include <math.h>
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#include <stdlib.h>
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#include <float.h>
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#include <limits.h>
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#include <ctype.h>
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#include "cJSON.h"
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static const char *global_ep;
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const char *cJSON_GetErrorPtr(void)
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{
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return global_ep;
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}
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/* case insensitive strcmp */
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static int cJSON_strcasecmp(const char *s1, const char *s2)
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{
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if (!s1)
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{
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return (s1 == s2) ? 0 : 1; /* both NULL? */
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}
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if (!s2)
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{
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return 1;
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}
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for(; tolower(*s1) == tolower(*s2); ++s1, ++s2)
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{
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if (*s1 == 0)
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{
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return 0;
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}
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}
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return tolower(*(const unsigned char *)s1) - tolower(*(const unsigned char *)s2);
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}
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static void *(*cJSON_malloc)(size_t sz) = malloc;
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static void (*cJSON_free)(void *ptr) = free;
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static char* cJSON_strdup(const char* str)
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{
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size_t len;
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char* copy;
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len = strlen(str) + 1;
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if (!(copy = (char*)cJSON_malloc(len)))
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{
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return 0;
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}
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memcpy(copy, str, len);
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return copy;
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}
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void cJSON_InitHooks(cJSON_Hooks* hooks)
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{
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if (!hooks)
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{
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/* Reset hooks */
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cJSON_malloc = malloc;
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cJSON_free = free;
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return;
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}
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cJSON_malloc = (hooks->malloc_fn) ? hooks->malloc_fn : malloc;
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cJSON_free = (hooks->free_fn) ? hooks->free_fn : free;
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}
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/* Internal constructor. */
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static cJSON *cJSON_New_Item(void)
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{
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cJSON* node = (cJSON*)cJSON_malloc(sizeof(cJSON));
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if (node)
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{
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memset(node, 0, sizeof(cJSON));
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}
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return node;
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}
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/* Delete a cJSON structure. */
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void cJSON_Delete(cJSON *c)
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{
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cJSON *next;
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while (c)
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{
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next = c->next;
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if (!(c->type & cJSON_IsReference) && c->child)
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{
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cJSON_Delete(c->child);
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}
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if (!(c->type & cJSON_IsReference) && c->valuestring)
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{
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cJSON_free(c->valuestring);
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}
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if (!(c->type & cJSON_StringIsConst) && c->string)
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{
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cJSON_free(c->string);
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}
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cJSON_free(c);
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c = next;
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}
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}
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/* Parse the input text to generate a number, and populate the result into item. */
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static const char *parse_number(cJSON *item, const char *num)
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{
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double n = 0;
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double sign = 1;
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double scale = 0;
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int subscale = 0;
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int signsubscale = 1;
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/* Has sign? */
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if (*num == '-')
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{
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sign = -1;
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num++;
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}
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/* is zero */
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if (*num == '0')
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{
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num++;
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}
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/* Number? */
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if ((*num >= '1') && (*num <= '9'))
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{
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do
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{
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n = (n * 10.0) + (*num++ - '0');
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}
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while ((*num >= '0') && (*num<='9'));
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}
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/* Fractional part? */
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if ((*num == '.') && (num[1] >= '0') && (num[1] <= '9'))
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{
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num++;
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do
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{
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n = (n *10.0) + (*num++ - '0');
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scale--;
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} while ((*num >= '0') && (*num <= '9'));
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}
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/* Exponent? */
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if ((*num == 'e') || (*num == 'E'))
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{
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num++;
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/* With sign? */
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if (*num == '+')
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{
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num++;
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}
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else if (*num == '-')
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{
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signsubscale = -1;
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num++;
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}
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/* Number? */
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while ((*num>='0') && (*num<='9'))
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{
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subscale = (subscale * 10) + (*num++ - '0');
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}
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}
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/* number = +/- number.fraction * 10^+/- exponent */
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n = sign * n * pow(10.0, (scale + subscale * signsubscale));
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item->valuedouble = n;
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item->valueint = (int)n;
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item->type = cJSON_Number;
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return num;
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}
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/* calculate the next largest power of 2 */
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static int pow2gt (int x)
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{
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--x;
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x |= x >> 1;
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x |= x >> 2;
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x |= x >> 4;
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x |= x >> 8;
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x |= x >> 16;
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return x + 1;
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}
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typedef struct
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{
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char *buffer;
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int length;
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int offset;
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} printbuffer;
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/* realloc printbuffer if necessary to have at least "needed" bytes more */
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static char* ensure(printbuffer *p, int needed)
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{
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char *newbuffer;
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int newsize;
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if (!p || !p->buffer)
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{
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return 0;
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}
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needed += p->offset;
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if (needed <= p->length)
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{
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return p->buffer + p->offset;
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}
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newsize = pow2gt(needed);
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newbuffer = (char*)cJSON_malloc(newsize);
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if (!newbuffer)
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{
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cJSON_free(p->buffer);
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p->length = 0;
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p->buffer = 0;
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return 0;
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}
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if (newbuffer)
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{
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memcpy(newbuffer, p->buffer, p->length);
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}
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cJSON_free(p->buffer);
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p->length = newsize;
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p->buffer = newbuffer;
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return newbuffer + p->offset;
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}
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/* calculate the new length of the string in a printbuffer */
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static int update(printbuffer *p)
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{
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char *str;
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if (!p || !p->buffer)
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{
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return 0;
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}
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str = p->buffer + p->offset;
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return p->offset + strlen(str);
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}
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/* Render the number nicely from the given item into a string. */
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static char *print_number(cJSON *item, printbuffer *p)
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{
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char *str = 0;
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double d = item->valuedouble;
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/* special case for 0. */
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if (d == 0)
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{
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if (p)
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{
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str = ensure(p, 2);
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}
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else
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{
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str = (char*)cJSON_malloc(2);
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}
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if (str)
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{
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strcpy(str,"0");
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}
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}
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/* value is an int */
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else if ((fabs(((double)item->valueint) - d) <= DBL_EPSILON) && (d <= INT_MAX) && (d >= INT_MIN))
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{
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if (p)
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{
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str = ensure(p, 21);
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}
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else
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{
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/* 2^64+1 can be represented in 21 chars. */
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str = (char*)cJSON_malloc(21);
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}
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if (str)
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{
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sprintf(str, "%d", item->valueint);
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}
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}
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/* value is a floating point number */
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else
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{
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if (p)
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{
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/* This is a nice tradeoff. */
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str = ensure(p, 64);
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}
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else
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{
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/* This is a nice tradeoff. */
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str=(char*)cJSON_malloc(64);
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}
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if (str)
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{
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/* This checks for NaN and Infinity */
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if ((d * 0) != 0)
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{
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sprintf(str, "null");
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}
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else if ((fabs(floor(d) - d) <= DBL_EPSILON) && (fabs(d) < 1.0e60))
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{
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sprintf(str, "%.0f", d);
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}
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else if ((fabs(d) < 1.0e-6) || (fabs(d) > 1.0e9))
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{
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sprintf(str, "%e", d);
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}
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else
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{
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sprintf(str, "%f", d);
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}
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}
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}
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return str;
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}
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/* parse 4 digit hexadecimal number */
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static unsigned parse_hex4(const char *str)
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{
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unsigned h = 0;
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/* first digit */
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if ((*str >= '0') && (*str <= '9'))
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{
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h += (*str) - '0';
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}
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else if ((*str >= 'A') && (*str <= 'F'))
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{
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h += 10 + (*str) - 'A';
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}
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else if ((*str >= 'a') && (*str <= 'f'))
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{
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h += 10 + (*str) - 'a';
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}
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else /* invalid */
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{
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return 0;
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}
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/* second digit */
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h = h << 4;
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str++;
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if ((*str >= '0') && (*str <= '9'))
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{
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h += (*str) - '0';
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}
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else if ((*str >= 'A') && (*str <= 'F'))
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{
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h += 10 + (*str) - 'A';
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}
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else if ((*str >= 'a') && (*str <= 'f'))
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{
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h += 10 + (*str) - 'a';
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}
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else /* invalid */
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{
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return 0;
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}
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/* third digit */
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h = h << 4;
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str++;
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if ((*str >= '0') && (*str <= '9'))
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{
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h += (*str) - '0';
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}
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else if ((*str >= 'A') && (*str <= 'F'))
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{
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h += 10 + (*str) - 'A';
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}
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else if ((*str >= 'a') && (*str <= 'f'))
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{
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h += 10 + (*str) - 'a';
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}
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else /* invalid */
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{
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return 0;
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}
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/* fourth digit */
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h = h << 4;
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str++;
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if ((*str >= '0') && (*str <= '9'))
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{
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h += (*str) - '0';
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}
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else if ((*str >= 'A') && (*str <= 'F'))
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{
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h += 10 + (*str) - 'A';
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}
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else if ((*str >= 'a') && (*str <= 'f'))
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{
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h += 10 + (*str) - 'a';
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}
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else /* invalid */
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{
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return 0;
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}
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return h;
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}
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/* first bytes of UTF8 encoding for a given length in bytes */
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static const unsigned char firstByteMark[7] =
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{
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0x00, /* should never happen */
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0x00, /* 0xxxxxxx */
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0xC0, /* 110xxxxx */
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0xE0, /* 1110xxxx */
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0xF0, /* 11110xxx */
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0xF8,
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0xFC
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};
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/* Parse the input text into an unescaped cstring, and populate item. */
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static const char *parse_string(cJSON *item, const char *str, const char **ep)
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{
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const char *ptr = str + 1;
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const char *end_ptr =str + 1;
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char *ptr2;
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char *out;
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int len = 0;
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unsigned uc;
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unsigned uc2;
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/* not a string! */
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if (*str != '\"')
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{
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*ep = str;
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return 0;
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}
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while ((*end_ptr != '\"') && *end_ptr && ++len)
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{
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if (*end_ptr++ == '\\')
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{
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if (*end_ptr == '\0')
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{
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/* prevent buffer overflow when last input character is a backslash */
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return 0;
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}
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/* Skip escaped quotes. */
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end_ptr++;
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}
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}
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/* This is at most how long we need for the string, roughly. */
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out = (char*)cJSON_malloc(len + 1);
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if (!out)
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{
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return 0;
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}
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item->valuestring = out; /* assign here so out will be deleted during cJSON_Delete() later */
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item->type = cJSON_String;
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ptr = str + 1;
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ptr2 = out;
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/* loop through the string literal */
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while (ptr < end_ptr)
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{
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if (*ptr != '\\')
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{
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*ptr2++ = *ptr++;
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}
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/* escape sequence */
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else
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{
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ptr++;
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switch (*ptr)
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{
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case 'b':
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*ptr2++ = '\b';
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break;
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case 'f':
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*ptr2++ = '\f';
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break;
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case 'n':
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*ptr2++ = '\n';
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break;
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case 'r':
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*ptr2++ = '\r';
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break;
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case 't':
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*ptr2++ = '\t';
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break;
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case 'u':
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/* transcode utf16 to utf8. See RFC2781 and RFC3629. */
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uc = parse_hex4(ptr + 1); /* get the unicode char. */
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ptr += 4;
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if (ptr >= end_ptr)
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{
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/* invalid */
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*ep = str;
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return 0;
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}
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/* check for invalid. */
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if (((uc >= 0xDC00) && (uc <= 0xDFFF)) || (uc == 0))
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{
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*ep = str;
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return 0;
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}
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/* UTF16 surrogate pairs. */
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if ((uc >= 0xD800) && (uc<=0xDBFF))
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{
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if ((ptr + 6) > end_ptr)
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{
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/* invalid */
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*ep = str;
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return 0;
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}
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if ((ptr[1] != '\\') || (ptr[2] != 'u'))
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{
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/* missing second-half of surrogate. */
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*ep = str;
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return 0;
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}
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uc2 = parse_hex4(ptr + 3);
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ptr += 6; /* \uXXXX */
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if ((uc2 < 0xDC00) || (uc2 > 0xDFFF))
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{
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/* invalid second-half of surrogate. */
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*ep = str;
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return 0;
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}
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/* calculate unicode codepoint from the surrogate pair */
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uc = 0x10000 + (((uc & 0x3FF) << 10) | (uc2 & 0x3FF));
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}
|
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/* encode as UTF8
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* takes at maximum 4 bytes to encode:
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* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
|
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len = 4;
|
|
if (uc < 0x80)
|
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{
|
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/* normal ascii, encoding 0xxxxxxx */
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len = 1;
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}
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else if (uc < 0x800)
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{
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/* two bytes, encoding 110xxxxx 10xxxxxx */
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len = 2;
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}
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else if (uc < 0x10000)
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{
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/* three bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx */
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len = 3;
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}
|
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ptr2 += len;
|
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|
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switch (len) {
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case 4:
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/* 10xxxxxx */
|
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*--ptr2 = ((uc | 0x80) & 0xBF);
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uc >>= 6;
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case 3:
|
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/* 10xxxxxx */
|
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*--ptr2 = ((uc | 0x80) & 0xBF);
|
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uc >>= 6;
|
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case 2:
|
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/* 10xxxxxx */
|
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*--ptr2 = ((uc | 0x80) & 0xBF);
|
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uc >>= 6;
|
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case 1:
|
|
/* depending on the length in bytes this determines the
|
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* encoding ofthe first UTF8 byte */
|
|
*--ptr2 = (uc | firstByteMark[len]);
|
|
}
|
|
ptr2 += len;
|
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break;
|
|
default:
|
|
*ptr2++ = *ptr;
|
|
break;
|
|
}
|
|
ptr++;
|
|
}
|
|
}
|
|
*ptr2 = '\0';
|
|
if (*ptr == '\"')
|
|
{
|
|
ptr++;
|
|
}
|
|
|
|
return ptr;
|
|
}
|
|
|
|
/* Render the cstring provided to an escaped version that can be printed. */
|
|
static char *print_string_ptr(const char *str, printbuffer *p)
|
|
{
|
|
const char *ptr;
|
|
char *ptr2;
|
|
char *out;
|
|
int len = 0;
|
|
int flag = 0;
|
|
unsigned char token;
|
|
|
|
/* empty string */
|
|
if (!str)
|
|
{
|
|
if (p)
|
|
{
|
|
out = ensure(p, 3);
|
|
}
|
|
else
|
|
{
|
|
out = (char*)cJSON_malloc(3);
|
|
}
|
|
if (!out)
|
|
{
|
|
return 0;
|
|
}
|
|
strcpy(out, "\"\"");
|
|
|
|
return out;
|
|
}
|
|
|
|
/* set "flag" to 1 if something needs to be escaped */
|
|
for (ptr = str; *ptr; ptr++)
|
|
{
|
|
flag |= (((*ptr > 0) && (*ptr < 32)) /* unprintable characters */
|
|
|| (*ptr == '\"') /* double quote */
|
|
|| (*ptr == '\\')) /* backslash */
|
|
? 1
|
|
: 0;
|
|
}
|
|
/* no characters have to be escaped */
|
|
if (!flag)
|
|
{
|
|
len = ptr - str;
|
|
if (p)
|
|
{
|
|
out = ensure(p, len + 3);
|
|
}
|
|
else
|
|
{
|
|
out = (char*)cJSON_malloc(len + 3);
|
|
}
|
|
if (!out)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
ptr2 = out;
|
|
*ptr2++ = '\"';
|
|
strcpy(ptr2, str);
|
|
ptr2[len] = '\"';
|
|
ptr2[len + 1] = '\0';
|
|
|
|
return out;
|
|
}
|
|
|
|
ptr = str;
|
|
/* calculate additional space that is needed for escaping */
|
|
while ((token = *ptr) && ++len)
|
|
{
|
|
if (strchr("\"\\\b\f\n\r\t", token))
|
|
{
|
|
len++; /* +1 for the backslash */
|
|
}
|
|
else if (token < 32)
|
|
{
|
|
len += 5; /* +5 for \uXXXX */
|
|
}
|
|
ptr++;
|
|
}
|
|
|
|
if (p)
|
|
{
|
|
out = ensure(p, len + 3);
|
|
}
|
|
else
|
|
{
|
|
out = (char*)cJSON_malloc(len + 3);
|
|
}
|
|
if (!out)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
ptr2 = out;
|
|
ptr = str;
|
|
*ptr2++ = '\"';
|
|
/* copy the string */
|
|
while (*ptr)
|
|
{
|
|
if (((unsigned char)*ptr > 31) && (*ptr != '\"') && (*ptr != '\\'))
|
|
{
|
|
/* normal character, copy */
|
|
*ptr2++ = *ptr++;
|
|
}
|
|
else
|
|
{
|
|
/* character needs to be escaped */
|
|
*ptr2++ = '\\';
|
|
switch (token = *ptr++)
|
|
{
|
|
case '\\':
|
|
*ptr2++ = '\\';
|
|
break;
|
|
case '\"':
|
|
*ptr2++ = '\"';
|
|
break;
|
|
case '\b':
|
|
*ptr2++ = 'b';
|
|
break;
|
|
case '\f':
|
|
*ptr2++ = 'f';
|
|
break;
|
|
case '\n':
|
|
*ptr2++ = 'n';
|
|
break;
|
|
case '\r':
|
|
*ptr2++ = 'r';
|
|
break;
|
|
case '\t':
|
|
*ptr2++ = 't';
|
|
break;
|
|
default:
|
|
/* escape and print as unicode codepoint */
|
|
sprintf(ptr2, "u%04x", token);
|
|
ptr2 += 5;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
*ptr2++ = '\"';
|
|
*ptr2++ = '\0';
|
|
|
|
return out;
|
|
}
|
|
|
|
/* Invoke print_string_ptr (which is useful) on an item. */
|
|
static char *print_string(cJSON *item, printbuffer *p)
|
|
{
|
|
return print_string_ptr(item->valuestring, p);
|
|
}
|
|
|
|
/* Predeclare these prototypes. */
|
|
static const char *parse_value(cJSON *item,const char *value,const char **ep);
|
|
static char *print_value(cJSON *item,int depth,int fmt,printbuffer *p);
|
|
static const char *parse_array(cJSON *item,const char *value,const char **ep);
|
|
static char *print_array(cJSON *item,int depth,int fmt,printbuffer *p);
|
|
static const char *parse_object(cJSON *item,const char *value,const char **ep);
|
|
static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p);
|
|
|
|
/* Utility to jump whitespace and cr/lf */
|
|
static const char *skip(const char *in) {while (in && *in && (unsigned char)*in<=32) in++; return in;}
|
|
|
|
/* Parse an object - create a new root, and populate. */
|
|
cJSON *cJSON_ParseWithOpts(const char *value,const char **return_parse_end,int require_null_terminated)
|
|
{
|
|
const char *end=0,**ep=return_parse_end?return_parse_end:&global_ep;
|
|
cJSON *c=cJSON_New_Item();
|
|
*ep=0;
|
|
if (!c) return 0; /* memory fail */
|
|
|
|
end=parse_value(c,skip(value),ep);
|
|
if (!end) {cJSON_Delete(c);return 0;} /* parse failure. ep is set. */
|
|
|
|
/* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
|
|
if (require_null_terminated) {end=skip(end);if (*end) {cJSON_Delete(c);*ep=end;return 0;}}
|
|
if (return_parse_end) *return_parse_end=end;
|
|
return c;
|
|
}
|
|
/* Default options for cJSON_Parse */
|
|
cJSON *cJSON_Parse(const char *value) {return cJSON_ParseWithOpts(value,0,0);}
|
|
|
|
/* Render a cJSON item/entity/structure to text. */
|
|
char *cJSON_Print(cJSON *item) {return print_value(item,0,1,0);}
|
|
char *cJSON_PrintUnformatted(cJSON *item) {return print_value(item,0,0,0);}
|
|
|
|
char *cJSON_PrintBuffered(cJSON *item,int prebuffer,int fmt)
|
|
{
|
|
printbuffer p;
|
|
p.buffer=(char*)cJSON_malloc(prebuffer);
|
|
p.length=prebuffer;
|
|
p.offset=0;
|
|
return print_value(item,0,fmt,&p);
|
|
}
|
|
|
|
|
|
/* Parser core - when encountering text, process appropriately. */
|
|
static const char *parse_value(cJSON *item,const char *value,const char **ep)
|
|
{
|
|
if (!value) return 0; /* Fail on null. */
|
|
if (!strncmp(value,"null",4)) { item->type=cJSON_NULL; return value+4; }
|
|
if (!strncmp(value,"false",5)) { item->type=cJSON_False; return value+5; }
|
|
if (!strncmp(value,"true",4)) { item->type=cJSON_True; item->valueint=1; return value+4; }
|
|
if (*value=='\"') { return parse_string(item,value,ep); }
|
|
if (*value=='-' || (*value>='0' && *value<='9')) { return parse_number(item,value); }
|
|
if (*value=='[') { return parse_array(item,value,ep); }
|
|
if (*value=='{') { return parse_object(item,value,ep); }
|
|
|
|
*ep=value;return 0; /* failure. */
|
|
}
|
|
|
|
/* Render a value to text. */
|
|
static char *print_value(cJSON *item,int depth,int fmt,printbuffer *p)
|
|
{
|
|
char *out=0;
|
|
if (!item) return 0;
|
|
if (p)
|
|
{
|
|
switch ((item->type)&255)
|
|
{
|
|
case cJSON_NULL: {out=ensure(p,5); if (out) strcpy(out,"null"); break;}
|
|
case cJSON_False: {out=ensure(p,6); if (out) strcpy(out,"false"); break;}
|
|
case cJSON_True: {out=ensure(p,5); if (out) strcpy(out,"true"); break;}
|
|
case cJSON_Number: out=print_number(item,p);break;
|
|
case cJSON_String: out=print_string(item,p);break;
|
|
case cJSON_Array: out=print_array(item,depth,fmt,p);break;
|
|
case cJSON_Object: out=print_object(item,depth,fmt,p);break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
switch ((item->type)&255)
|
|
{
|
|
case cJSON_NULL: out=cJSON_strdup("null"); break;
|
|
case cJSON_False: out=cJSON_strdup("false");break;
|
|
case cJSON_True: out=cJSON_strdup("true"); break;
|
|
case cJSON_Number: out=print_number(item,0);break;
|
|
case cJSON_String: out=print_string(item,0);break;
|
|
case cJSON_Array: out=print_array(item,depth,fmt,0);break;
|
|
case cJSON_Object: out=print_object(item,depth,fmt,0);break;
|
|
}
|
|
}
|
|
return out;
|
|
}
|
|
|
|
/* Build an array from input text. */
|
|
static const char *parse_array(cJSON *item,const char *value,const char **ep)
|
|
{
|
|
cJSON *child;
|
|
if (*value!='[') {*ep=value;return 0;} /* not an array! */
|
|
|
|
item->type=cJSON_Array;
|
|
value=skip(value+1);
|
|
if (*value==']') return value+1; /* empty array. */
|
|
|
|
item->child=child=cJSON_New_Item();
|
|
if (!item->child) return 0; /* memory fail */
|
|
value=skip(parse_value(child,skip(value),ep)); /* skip any spacing, get the value. */
|
|
if (!value) return 0;
|
|
|
|
while (*value==',')
|
|
{
|
|
cJSON *new_item;
|
|
if (!(new_item=cJSON_New_Item())) return 0; /* memory fail */
|
|
child->next=new_item;new_item->prev=child;child=new_item;
|
|
value=skip(parse_value(child,skip(value+1),ep));
|
|
if (!value) return 0; /* memory fail */
|
|
}
|
|
|
|
if (*value==']') return value+1; /* end of array */
|
|
*ep=value;return 0; /* malformed. */
|
|
}
|
|
|
|
/* Render an array to text */
|
|
static char *print_array(cJSON *item,int depth,int fmt,printbuffer *p)
|
|
{
|
|
char **entries;
|
|
char *out=0,*ptr,*ret;int len=5;
|
|
cJSON *child=item->child;
|
|
int numentries=0,i=0,fail=0;
|
|
size_t tmplen=0;
|
|
|
|
/* How many entries in the array? */
|
|
while (child) numentries++,child=child->next;
|
|
/* Explicitly handle numentries==0 */
|
|
if (!numentries)
|
|
{
|
|
if (p) out=ensure(p,3);
|
|
else out=(char*)cJSON_malloc(3);
|
|
if (out) strcpy(out,"[]");
|
|
return out;
|
|
}
|
|
|
|
if (p)
|
|
{
|
|
/* Compose the output array. */
|
|
i=p->offset;
|
|
ptr=ensure(p,1);if (!ptr) return 0; *ptr='['; p->offset++;
|
|
child=item->child;
|
|
while (child && !fail)
|
|
{
|
|
print_value(child,depth+1,fmt,p);
|
|
p->offset=update(p);
|
|
if (child->next) {len=fmt?2:1;ptr=ensure(p,len+1);if (!ptr) return 0;*ptr++=',';if(fmt)*ptr++=' ';*ptr=0;p->offset+=len;}
|
|
child=child->next;
|
|
}
|
|
ptr=ensure(p,2);if (!ptr) return 0; *ptr++=']';*ptr=0;
|
|
out=(p->buffer)+i;
|
|
}
|
|
else
|
|
{
|
|
/* Allocate an array to hold the values for each */
|
|
entries=(char**)cJSON_malloc(numentries*sizeof(char*));
|
|
if (!entries) return 0;
|
|
memset(entries,0,numentries*sizeof(char*));
|
|
/* Retrieve all the results: */
|
|
child=item->child;
|
|
while (child && !fail)
|
|
{
|
|
ret=print_value(child,depth+1,fmt,0);
|
|
entries[i++]=ret;
|
|
if (ret) len+=strlen(ret)+2+(fmt?1:0); else fail=1;
|
|
child=child->next;
|
|
}
|
|
|
|
/* If we didn't fail, try to malloc the output string */
|
|
if (!fail) out=(char*)cJSON_malloc(len);
|
|
/* If that fails, we fail. */
|
|
if (!out) fail=1;
|
|
|
|
/* Handle failure. */
|
|
if (fail)
|
|
{
|
|
for (i=0;i<numentries;i++) if (entries[i]) cJSON_free(entries[i]);
|
|
cJSON_free(entries);
|
|
return 0;
|
|
}
|
|
|
|
/* Compose the output array. */
|
|
*out='[';
|
|
ptr=out+1;*ptr=0;
|
|
for (i=0;i<numentries;i++)
|
|
{
|
|
tmplen=strlen(entries[i]);memcpy(ptr,entries[i],tmplen);ptr+=tmplen;
|
|
if (i!=numentries-1) {*ptr++=',';if(fmt)*ptr++=' ';*ptr=0;}
|
|
cJSON_free(entries[i]);
|
|
}
|
|
cJSON_free(entries);
|
|
*ptr++=']';*ptr++=0;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
/* Build an object from the text. */
|
|
static const char *parse_object(cJSON *item,const char *value,const char **ep)
|
|
{
|
|
cJSON *child;
|
|
if (*value!='{') {*ep=value;return 0;} /* not an object! */
|
|
|
|
item->type=cJSON_Object;
|
|
value=skip(value+1);
|
|
if (*value=='}') return value+1; /* empty array. */
|
|
|
|
item->child=child=cJSON_New_Item();
|
|
if (!item->child) return 0;
|
|
value=skip(parse_string(child,skip(value),ep));
|
|
if (!value) return 0;
|
|
child->string=child->valuestring;child->valuestring=0;
|
|
if (*value!=':') {*ep=value;return 0;} /* fail! */
|
|
value=skip(parse_value(child,skip(value+1),ep)); /* skip any spacing, get the value. */
|
|
if (!value) return 0;
|
|
|
|
while (*value==',')
|
|
{
|
|
cJSON *new_item;
|
|
if (!(new_item=cJSON_New_Item())) return 0; /* memory fail */
|
|
child->next=new_item;new_item->prev=child;child=new_item;
|
|
value=skip(parse_string(child,skip(value+1),ep));
|
|
if (!value) return 0;
|
|
child->string=child->valuestring;child->valuestring=0;
|
|
if (*value!=':') {*ep=value;return 0;} /* fail! */
|
|
value=skip(parse_value(child,skip(value+1),ep)); /* skip any spacing, get the value. */
|
|
if (!value) return 0;
|
|
}
|
|
|
|
if (*value=='}') return value+1; /* end of array */
|
|
*ep=value;return 0; /* malformed. */
|
|
}
|
|
|
|
/* Render an object to text. */
|
|
static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p)
|
|
{
|
|
char **entries=0,**names=0;
|
|
char *out=0,*ptr,*ret,*str;int len=7,i=0,j;
|
|
cJSON *child=item->child;
|
|
int numentries=0,fail=0;
|
|
size_t tmplen=0;
|
|
/* Count the number of entries. */
|
|
while (child) numentries++,child=child->next;
|
|
/* Explicitly handle empty object case */
|
|
if (!numentries)
|
|
{
|
|
if (p) out=ensure(p,fmt?depth+4:3);
|
|
else out=(char*)cJSON_malloc(fmt?depth+4:3);
|
|
if (!out) return 0;
|
|
ptr=out;*ptr++='{';
|
|
if (fmt) {*ptr++='\n';for (i=0;i<depth;i++) *ptr++='\t';}
|
|
*ptr++='}';*ptr++=0;
|
|
return out;
|
|
}
|
|
if (p)
|
|
{
|
|
/* Compose the output: */
|
|
i=p->offset;
|
|
len=fmt?2:1; ptr=ensure(p,len+1); if (!ptr) return 0;
|
|
*ptr++='{'; if (fmt) *ptr++='\n'; *ptr=0; p->offset+=len;
|
|
child=item->child;depth++;
|
|
while (child)
|
|
{
|
|
if (fmt)
|
|
{
|
|
ptr=ensure(p,depth); if (!ptr) return 0;
|
|
for (j=0;j<depth;j++) *ptr++='\t';
|
|
p->offset+=depth;
|
|
}
|
|
print_string_ptr(child->string,p);
|
|
p->offset=update(p);
|
|
|
|
len=fmt?2:1;
|
|
ptr=ensure(p,len); if (!ptr) return 0;
|
|
*ptr++=':';if (fmt) *ptr++='\t';
|
|
p->offset+=len;
|
|
|
|
print_value(child,depth,fmt,p);
|
|
p->offset=update(p);
|
|
|
|
len=(fmt?1:0)+(child->next?1:0);
|
|
ptr=ensure(p,len+1); if (!ptr) return 0;
|
|
if (child->next) *ptr++=',';
|
|
if (fmt) *ptr++='\n';*ptr=0;
|
|
p->offset+=len;
|
|
child=child->next;
|
|
}
|
|
ptr=ensure(p,fmt?(depth+1):2); if (!ptr) return 0;
|
|
if (fmt) for (i=0;i<depth-1;i++) *ptr++='\t';
|
|
*ptr++='}';*ptr=0;
|
|
out=(p->buffer)+i;
|
|
}
|
|
else
|
|
{
|
|
/* Allocate space for the names and the objects */
|
|
entries=(char**)cJSON_malloc(numentries*sizeof(char*));
|
|
if (!entries) return 0;
|
|
names=(char**)cJSON_malloc(numentries*sizeof(char*));
|
|
if (!names) {cJSON_free(entries);return 0;}
|
|
memset(entries,0,sizeof(char*)*numentries);
|
|
memset(names,0,sizeof(char*)*numentries);
|
|
|
|
/* Collect all the results into our arrays: */
|
|
child=item->child;depth++;if (fmt) len+=depth;
|
|
while (child && !fail)
|
|
{
|
|
names[i]=str=print_string_ptr(child->string,0);
|
|
entries[i++]=ret=print_value(child,depth,fmt,0);
|
|
if (str && ret) len+=strlen(ret)+strlen(str)+2+(fmt?2+depth:0); else fail=1;
|
|
child=child->next;
|
|
}
|
|
|
|
/* Try to allocate the output string */
|
|
if (!fail) out=(char*)cJSON_malloc(len);
|
|
if (!out) fail=1;
|
|
|
|
/* Handle failure */
|
|
if (fail)
|
|
{
|
|
for (i=0;i<numentries;i++) {if (names[i]) cJSON_free(names[i]);if (entries[i]) cJSON_free(entries[i]);}
|
|
cJSON_free(names);cJSON_free(entries);
|
|
return 0;
|
|
}
|
|
|
|
/* Compose the output: */
|
|
*out='{';ptr=out+1;if (fmt)*ptr++='\n';*ptr=0;
|
|
for (i=0;i<numentries;i++)
|
|
{
|
|
if (fmt) for (j=0;j<depth;j++) *ptr++='\t';
|
|
tmplen=strlen(names[i]);memcpy(ptr,names[i],tmplen);ptr+=tmplen;
|
|
*ptr++=':';if (fmt) *ptr++='\t';
|
|
strcpy(ptr,entries[i]);ptr+=strlen(entries[i]);
|
|
if (i!=numentries-1) *ptr++=',';
|
|
if (fmt) *ptr++='\n';*ptr=0;
|
|
cJSON_free(names[i]);cJSON_free(entries[i]);
|
|
}
|
|
|
|
cJSON_free(names);cJSON_free(entries);
|
|
if (fmt) for (i=0;i<depth-1;i++) *ptr++='\t';
|
|
*ptr++='}';*ptr++=0;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
/* Get Array size/item / object item. */
|
|
int cJSON_GetArraySize(cJSON *array) {cJSON *c=array->child;int i=0;while(c)i++,c=c->next;return i;}
|
|
cJSON *cJSON_GetArrayItem(cJSON *array,int item) {cJSON *c=array?array->child:0;while (c && item>0) item--,c=c->next; return c;}
|
|
cJSON *cJSON_GetObjectItem(cJSON *object,const char *string) {cJSON *c=object?object->child:0;while (c && cJSON_strcasecmp(c->string,string)) c=c->next; return c;}
|
|
int cJSON_HasObjectItem(cJSON *object,const char *string) {return cJSON_GetObjectItem(object,string)?1:0;}
|
|
|
|
/* Utility for array list handling. */
|
|
static void suffix_object(cJSON *prev,cJSON *item) {prev->next=item;item->prev=prev;}
|
|
/* Utility for handling references. */
|
|
static cJSON *create_reference(cJSON *item) {cJSON *ref=cJSON_New_Item();if (!ref) return 0;memcpy(ref,item,sizeof(cJSON));ref->string=0;ref->type|=cJSON_IsReference;ref->next=ref->prev=0;return ref;}
|
|
|
|
/* Add item to array/object. */
|
|
void cJSON_AddItemToArray(cJSON *array, cJSON *item) {cJSON *c=array->child;if (!item) return; if (!c) {array->child=item;} else {while (c && c->next) c=c->next; suffix_object(c,item);}}
|
|
void cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item) {if (!item) return; if (item->string) cJSON_free(item->string);item->string=cJSON_strdup(string);cJSON_AddItemToArray(object,item);}
|
|
void cJSON_AddItemToObjectCS(cJSON *object,const char *string,cJSON *item) {if (!item) return; if (!(item->type&cJSON_StringIsConst) && item->string) cJSON_free(item->string);item->string=(char*)string;item->type|=cJSON_StringIsConst;cJSON_AddItemToArray(object,item);}
|
|
void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item) {cJSON_AddItemToArray(array,create_reference(item));}
|
|
void cJSON_AddItemReferenceToObject(cJSON *object,const char *string,cJSON *item) {cJSON_AddItemToObject(object,string,create_reference(item));}
|
|
|
|
cJSON *cJSON_DetachItemFromArray(cJSON *array,int which) {cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) return 0;
|
|
if (c->prev) c->prev->next=c->next;if (c->next) c->next->prev=c->prev;if (c==array->child) array->child=c->next;c->prev=c->next=0;return c;}
|
|
void cJSON_DeleteItemFromArray(cJSON *array,int which) {cJSON_Delete(cJSON_DetachItemFromArray(array,which));}
|
|
cJSON *cJSON_DetachItemFromObject(cJSON *object,const char *string) {int i=0;cJSON *c=object->child;while (c && cJSON_strcasecmp(c->string,string)) i++,c=c->next;if (c) return cJSON_DetachItemFromArray(object,i);return 0;}
|
|
void cJSON_DeleteItemFromObject(cJSON *object,const char *string) {cJSON_Delete(cJSON_DetachItemFromObject(object,string));}
|
|
|
|
/* Replace array/object items with new ones. */
|
|
void cJSON_InsertItemInArray(cJSON *array,int which,cJSON *newitem) {cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) {cJSON_AddItemToArray(array,newitem);return;}
|
|
newitem->next=c;newitem->prev=c->prev;c->prev=newitem;if (c==array->child) array->child=newitem; else newitem->prev->next=newitem;}
|
|
void cJSON_ReplaceItemInArray(cJSON *array,int which,cJSON *newitem) {cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) return;
|
|
newitem->next=c->next;newitem->prev=c->prev;if (newitem->next) newitem->next->prev=newitem;
|
|
if (c==array->child) array->child=newitem; else newitem->prev->next=newitem;c->next=c->prev=0;cJSON_Delete(c);}
|
|
void cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem){int i=0;cJSON *c=object->child;while(c && cJSON_strcasecmp(c->string,string))i++,c=c->next;if(c){newitem->string=cJSON_strdup(string);cJSON_ReplaceItemInArray(object,i,newitem);}}
|
|
|
|
/* Create basic types: */
|
|
cJSON *cJSON_CreateNull(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_NULL;return item;}
|
|
cJSON *cJSON_CreateTrue(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_True;return item;}
|
|
cJSON *cJSON_CreateFalse(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_False;return item;}
|
|
cJSON *cJSON_CreateBool(int b) {cJSON *item=cJSON_New_Item();if(item)item->type=b?cJSON_True:cJSON_False;return item;}
|
|
cJSON *cJSON_CreateNumber(double num) {cJSON *item=cJSON_New_Item();if(item){item->type=cJSON_Number;item->valuedouble=num;item->valueint=(int)num;}return item;}
|
|
cJSON *cJSON_CreateString(const char *string) {cJSON *item=cJSON_New_Item();if(item){item->type=cJSON_String;item->valuestring=cJSON_strdup(string);if(!item->valuestring){cJSON_Delete(item);return 0;}}return item;}
|
|
cJSON *cJSON_CreateArray(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Array;return item;}
|
|
cJSON *cJSON_CreateObject(void) {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Object;return item;}
|
|
|
|
/* Create Arrays: */
|
|
cJSON *cJSON_CreateIntArray(const int *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!n){cJSON_Delete(a);return 0;}if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
|
cJSON *cJSON_CreateFloatArray(const float *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!n){cJSON_Delete(a);return 0;}if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
|
cJSON *cJSON_CreateDoubleArray(const double *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!n){cJSON_Delete(a);return 0;}if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
|
cJSON *cJSON_CreateStringArray(const char **strings,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateString(strings[i]);if(!n){cJSON_Delete(a);return 0;}if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
|
|
|
/* Duplication */
|
|
cJSON *cJSON_Duplicate(cJSON *item,int recurse)
|
|
{
|
|
cJSON *newitem,*cptr,*nptr=0,*newchild;
|
|
/* Bail on bad ptr */
|
|
if (!item) return 0;
|
|
/* Create new item */
|
|
newitem=cJSON_New_Item();
|
|
if (!newitem) return 0;
|
|
/* Copy over all vars */
|
|
newitem->type=item->type&(~cJSON_IsReference),newitem->valueint=item->valueint,newitem->valuedouble=item->valuedouble;
|
|
if (item->valuestring) {newitem->valuestring=cJSON_strdup(item->valuestring); if (!newitem->valuestring) {cJSON_Delete(newitem);return 0;}}
|
|
if (item->string) {newitem->string=cJSON_strdup(item->string); if (!newitem->string) {cJSON_Delete(newitem);return 0;}}
|
|
/* If non-recursive, then we're done! */
|
|
if (!recurse) return newitem;
|
|
/* Walk the ->next chain for the child. */
|
|
cptr=item->child;
|
|
while (cptr)
|
|
{
|
|
newchild=cJSON_Duplicate(cptr,1); /* Duplicate (with recurse) each item in the ->next chain */
|
|
if (!newchild) {cJSON_Delete(newitem);return 0;}
|
|
if (nptr) {nptr->next=newchild,newchild->prev=nptr;nptr=newchild;} /* If newitem->child already set, then crosswire ->prev and ->next and move on */
|
|
else {newitem->child=newchild;nptr=newchild;} /* Set newitem->child and move to it */
|
|
cptr=cptr->next;
|
|
}
|
|
return newitem;
|
|
}
|
|
|
|
void cJSON_Minify(char *json)
|
|
{
|
|
char *into=json;
|
|
while (*json)
|
|
{
|
|
if (*json==' ') json++;
|
|
else if (*json=='\t') json++; /* Whitespace characters. */
|
|
else if (*json=='\r') json++;
|
|
else if (*json=='\n') json++;
|
|
else if (*json=='/' && json[1]=='/') while (*json && *json!='\n') json++; /* double-slash comments, to end of line. */
|
|
else if (*json=='/' && json[1]=='*') {while (*json && !(*json=='*' && json[1]=='/')) json++;json+=2;} /* multiline comments. */
|
|
else if (*json=='\"'){*into++=*json++;while (*json && *json!='\"'){if (*json=='\\') *into++=*json++;*into++=*json++;}*into++=*json++;} /* string literals, which are \" sensitive. */
|
|
else *into++=*json++; /* All other characters. */
|
|
}
|
|
*into=0; /* and null-terminate. */
|
|
}
|