mirror of
https://github.com/DaveGamble/cJSON
synced 2024-12-27 00:52:03 +00:00
765 lines
28 KiB
C
765 lines
28 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) {return global_ep;}
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static int cJSON_strcasecmp(const char *s1,const char *s2)
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{
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if (!s1) return (s1==s2)?0:1;if (!s2) return 1;
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for(; tolower(*s1) == tolower(*s2); ++s1, ++s2) if(*s1 == 0) return 0;
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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))) return 0;
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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) { /* 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) memset(node,0,sizeof(cJSON));
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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) cJSON_Delete(c->child);
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if (!(c->type&cJSON_IsReference) && c->valuestring) cJSON_free(c->valuestring);
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if (!(c->type&cJSON_StringIsConst) && c->string) cJSON_free(c->string);
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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,sign=1,scale=0;int subscale=0,signsubscale=1;
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if (*num=='-') sign=-1,num++; /* Has sign? */
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if (*num=='0') num++; /* is zero */
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if (*num>='1' && *num<='9') do n=(n*10.0)+(*num++ -'0'); while (*num>='0' && *num<='9'); /* Number? */
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if (*num=='.' && num[1]>='0' && num[1]<='9') {num++; do n=(n*10.0)+(*num++ -'0'),scale--; while (*num>='0' && *num<='9');} /* Fractional part? */
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if (*num=='e' || *num=='E') /* Exponent? */
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{ num++;if (*num=='+') num++; else if (*num=='-') signsubscale=-1,num++; /* With sign? */
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while (*num>='0' && *num<='9') subscale=(subscale*10)+(*num++ - '0'); /* Number? */
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}
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n=sign*n*pow(10.0,(scale+subscale*signsubscale)); /* number = +/- number.fraction * 10^+/- exponent */
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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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static int pow2gt (int x) { --x; x|=x>>1; x|=x>>2; x|=x>>4; x|=x>>8; x|=x>>16; return x+1; }
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typedef struct {char *buffer; int length; int offset; } printbuffer;
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static char* ensure(printbuffer *p,int needed)
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{
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char *newbuffer;int newsize;
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if (!p || !p->buffer) return 0;
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needed+=p->offset;
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if (needed<=p->length) return p->buffer+p->offset;
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newsize=pow2gt(needed);
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newbuffer=(char*)cJSON_malloc(newsize);
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if (!newbuffer) {cJSON_free(p->buffer);p->length=0,p->buffer=0;return 0;}
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if (newbuffer) memcpy(newbuffer,p->buffer,p->length);
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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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static int update(printbuffer *p)
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{
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char *str;
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if (!p || !p->buffer) return 0;
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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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if (d==0)
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{
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if (p) str=ensure(p,2);
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else str=(char*)cJSON_malloc(2); /* special case for 0. */
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if (str) strcpy(str,"0");
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}
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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) str=ensure(p,21);
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else str=(char*)cJSON_malloc(21); /* 2^64+1 can be represented in 21 chars. */
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if (str) sprintf(str,"%d",item->valueint);
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}
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else
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{
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if (p) str=ensure(p,64);
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else str=(char*)cJSON_malloc(64); /* This is a nice tradeoff. */
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if (str)
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{
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if (fpclassify(d) != FP_ZERO && !isnormal(d)) sprintf(str,"null");
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else if (fabs(floor(d)-d)<=DBL_EPSILON && fabs(d)<1.0e60) sprintf(str,"%.0f",d);
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else if (fabs(d)<1.0e-6 || fabs(d)>1.0e9) sprintf(str,"%e",d);
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else sprintf(str,"%f",d);
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}
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}
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return str;
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}
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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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if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
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h=h<<4;str++;
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if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
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h=h<<4;str++;
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if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
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h=h<<4;str++;
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if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
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return h;
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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 unsigned char firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
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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,*end_ptr=str+1;char *ptr2;char *out;int len=0;unsigned uc,uc2;
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if (*str!='\"') {*ep=str;return 0;} /* not a string! */
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while (*end_ptr!='\"' && *end_ptr && ++len) if (*end_ptr++ == '\\') end_ptr++; /* Skip escaped quotes. */
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out=(char*)cJSON_malloc(len+1); /* This is how long we need for the string, roughly. */
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if (!out) return 0;
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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;ptr2=out;
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while (ptr < end_ptr)
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{
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if (*ptr!='\\') *ptr2++=*ptr++;
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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': *ptr2++='\b'; break;
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case 'f': *ptr2++='\f'; break;
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case 'n': *ptr2++='\n'; break;
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case 'r': *ptr2++='\r'; break;
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case 't': *ptr2++='\t'; break;
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case 'u': /* transcode utf16 to utf8. */
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uc=parse_hex4(ptr+1);ptr+=4; /* get the unicode char. */
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if (ptr >= end_ptr) {*ep=str;return 0;} /* invalid */
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if ((uc>=0xDC00 && uc<=0xDFFF) || uc==0) {*ep=str;return 0;} /* check for invalid. */
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if (uc>=0xD800 && uc<=0xDBFF) /* UTF16 surrogate pairs. */
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{
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if (ptr+6 > end_ptr) {*ep=str;return 0;} /* invalid */
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if (ptr[1]!='\\' || ptr[2]!='u') {*ep=str;return 0;} /* missing second-half of surrogate. */
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uc2=parse_hex4(ptr+3);ptr+=6;
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if (uc2<0xDC00 || uc2>0xDFFF) {*ep=str;return 0;} /* invalid second-half of surrogate. */
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uc=0x10000 + (((uc&0x3FF)<<10) | (uc2&0x3FF));
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}
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len=4;if (uc<0x80) len=1;else if (uc<0x800) len=2;else if (uc<0x10000) len=3; ptr2+=len;
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switch (len) {
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case 4: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
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case 3: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
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case 2: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
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case 1: *--ptr2 =(uc | firstByteMark[len]);
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}
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ptr2+=len;
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break;
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default: *ptr2++=*ptr; break;
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}
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ptr++;
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}
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}
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*ptr2=0;
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if (*ptr=='\"') ptr++;
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return ptr;
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}
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/* Render the cstring provided to an escaped version that can be printed. */
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static char *print_string_ptr(const char *str,printbuffer *p)
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{
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const char *ptr;char *ptr2,*out;int len=0,flag=0;unsigned char token;
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if (!str)
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{
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if (p) out=ensure(p,3);
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else out=(char*)cJSON_malloc(3);
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if (!out) return 0;
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strcpy(out,"\"\"");
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return out;
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}
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for (ptr=str;*ptr;ptr++) flag|=((*ptr>0 && *ptr<32)||(*ptr=='\"')||(*ptr=='\\'))?1:0;
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if (!flag)
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{
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len=ptr-str;
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if (p) out=ensure(p,len+3);
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else out=(char*)cJSON_malloc(len+3);
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if (!out) return 0;
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ptr2=out;*ptr2++='\"';
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strcpy(ptr2,str);
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ptr2[len]='\"';
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ptr2[len+1]=0;
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return out;
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}
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ptr=str;while ((token=*ptr) && ++len) {if (strchr("\"\\\b\f\n\r\t",token)) len++; else if (token<32) len+=5;ptr++;}
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if (p) out=ensure(p,len+3);
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else out=(char*)cJSON_malloc(len+3);
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if (!out) return 0;
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ptr2=out;ptr=str;
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*ptr2++='\"';
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while (*ptr)
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{
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if ((unsigned char)*ptr>31 && *ptr!='\"' && *ptr!='\\') *ptr2++=*ptr++;
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else
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{
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*ptr2++='\\';
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switch (token=*ptr++)
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{
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case '\\': *ptr2++='\\'; break;
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case '\"': *ptr2++='\"'; break;
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case '\b': *ptr2++='b'; break;
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case '\f': *ptr2++='f'; break;
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case '\n': *ptr2++='n'; break;
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case '\r': *ptr2++='r'; break;
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case '\t': *ptr2++='t'; break;
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default: sprintf(ptr2,"u%04x",token);ptr2+=5; break; /* escape and print */
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}
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}
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}
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*ptr2++='\"';*ptr2++=0;
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return out;
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}
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/* Invote print_string_ptr (which is useful) on an item. */
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static char *print_string(cJSON *item,printbuffer *p) {return print_string_ptr(item->valuestring,p);}
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/* Predeclare these prototypes. */
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static const char *parse_value(cJSON *item,const char *value,const char **ep);
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static char *print_value(cJSON *item,int depth,int fmt,printbuffer *p);
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static const char *parse_array(cJSON *item,const char *value,const char **ep);
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static char *print_array(cJSON *item,int depth,int fmt,printbuffer *p);
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static const char *parse_object(cJSON *item,const char *value,const char **ep);
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static char *print_object(cJSON *item,int depth,int fmt,printbuffer *p);
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/* Utility to jump whitespace and cr/lf */
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static const char *skip(const char *in) {while (in && *in && (unsigned char)*in<=32) in++; return in;}
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/* Parse an object - create a new root, and populate. */
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cJSON *cJSON_ParseWithOpts(const char *value,const char **return_parse_end,int require_null_terminated)
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{
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const char *end=0,**ep=return_parse_end?return_parse_end:&global_ep;
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cJSON *c=cJSON_New_Item();
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*ep=0;
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if (!c) return 0; /* memory fail */
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end=parse_value(c,skip(value),ep);
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if (!end) {cJSON_Delete(c);return 0;} /* parse failure. ep is set. */
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/* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
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if (require_null_terminated) {end=skip(end);if (*end) {cJSON_Delete(c);*ep=end;return 0;}}
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if (return_parse_end) *return_parse_end=end;
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return c;
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}
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/* Default options for cJSON_Parse */
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cJSON *cJSON_Parse(const char *value) {return cJSON_ParseWithOpts(value,0,0);}
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/* Render a cJSON item/entity/structure to text. */
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char *cJSON_Print(cJSON *item) {return print_value(item,0,1,0);}
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char *cJSON_PrintUnformatted(cJSON *item) {return print_value(item,0,0,0);}
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char *cJSON_PrintBuffered(cJSON *item,int prebuffer,int fmt)
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{
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printbuffer p;
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p.buffer=(char*)cJSON_malloc(prebuffer);
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p.length=prebuffer;
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p.offset=0;
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return print_value(item,0,fmt,&p);
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}
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/* Parser core - when encountering text, process appropriately. */
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static const char *parse_value(cJSON *item,const char *value,const char **ep)
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{
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if (!value) return 0; /* Fail on null. */
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if (!strncmp(value,"null",4)) { item->type=cJSON_NULL; return value+4; }
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if (!strncmp(value,"false",5)) { item->type=cJSON_False; return value+5; }
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if (!strncmp(value,"true",4)) { item->type=cJSON_True; item->valueint=1; return value+4; }
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if (*value=='\"') { return parse_string(item,value,ep); }
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if (*value=='-' || (*value>='0' && *value<='9')) { return parse_number(item,value); }
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if (*value=='[') { return parse_array(item,value,ep); }
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if (*value=='{') { return parse_object(item,value,ep); }
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*ep=value;return 0; /* failure. */
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}
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/* Render a value to text. */
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static char *print_value(cJSON *item,int depth,int fmt,printbuffer *p)
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{
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char *out=0;
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if (!item) return 0;
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if (p)
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{
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switch ((item->type)&255)
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{
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case cJSON_NULL: {out=ensure(p,5); if (out) strcpy(out,"null"); break;}
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case cJSON_False: {out=ensure(p,6); if (out) strcpy(out,"false"); break;}
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case cJSON_True: {out=ensure(p,5); if (out) strcpy(out,"true"); break;}
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case cJSON_Number: out=print_number(item,p);break;
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case cJSON_String: out=print_string(item,p);break;
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case cJSON_Array: out=print_array(item,depth,fmt,p);break;
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case cJSON_Object: out=print_object(item,depth,fmt,p);break;
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}
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}
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else
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{
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switch ((item->type)&255)
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{
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case cJSON_NULL: out=cJSON_strdup("null"); break;
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case cJSON_False: out=cJSON_strdup("false");break;
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case cJSON_True: out=cJSON_strdup("true"); break;
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case cJSON_Number: out=print_number(item,0);break;
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case cJSON_String: out=print_string(item,0);break;
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case cJSON_Array: out=print_array(item,depth,fmt,0);break;
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case cJSON_Object: out=print_object(item,depth,fmt,0);break;
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}
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}
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return out;
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}
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/* Build an array from input text. */
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static const char *parse_array(cJSON *item,const char *value,const char **ep)
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{
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cJSON *child;
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if (*value!='[') {*ep=value;return 0;} /* not an array! */
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item->type=cJSON_Array;
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value=skip(value+1);
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if (*value==']') return value+1; /* empty array. */
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item->child=child=cJSON_New_Item();
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if (!item->child) return 0; /* memory fail */
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value=skip(parse_value(child,skip(value),ep)); /* skip any spacing, get the value. */
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if (!value) return 0;
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|
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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; if (array == NULL) return NULL; c=array->child; while (c && item>0) item--,c=c->next; return c;}
|
|
cJSON *cJSON_GetObjectItem(cJSON *object,const char *string) {cJSON *c; if (object == NULL) return NULL; c=object->child; while (c && cJSON_strcasecmp(c->string,string)) c=c->next; return c;}
|
|
int cJSON_HasObjectItem(cJSON *object,const char *string) {
|
|
cJSON *c=object->child;
|
|
while (c )
|
|
{
|
|
if(cJSON_strcasecmp(c->string,string)==0){
|
|
return 1;
|
|
}
|
|
c=c->next;
|
|
}
|
|
return 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. */
|
|
}
|