mirror of https://github.com/DaveGamble/cJSON
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "cJSON_Utils.h"
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cJSON *cJSONUtils_GetPointer(cJSON *object,const char *pointer)
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{
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cJSON *target=object;int which=0;const char *s=0;int len=0;char *element=0,*e=0;
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while (*pointer=='/' && object)
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{
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pointer++;
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if (object->type==cJSON_Array)
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{
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which=0;
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while (*pointer>='0' && *pointer<='9') {which*=10;which+=*pointer++ - '0';}
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if (*pointer && *pointer!='/') return 0;
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object=cJSON_GetArrayItem(object,which);
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}
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else if (object->type==cJSON_Object)
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{
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s=pointer;len=0;
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while (*s && *s!='/') {if (*s!='~') len++; s++;}
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e=element=malloc(len+1); if (!element) return 0;
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element[len]=0;
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while (*pointer && *pointer!='/')
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{
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if (*pointer=='~' && pointer[1]=='0') *e++='~',pointer+=2;
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else if (*pointer=='~' && pointer[1]=='1') *e++='/',pointer+=2;
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else if (*pointer=='~') {free(element); return 0;} // Invalid encoding.
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else *e++=*pointer++;
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}
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object=cJSON_GetObjectItem(object,element);
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free(element);
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}
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else return 0;
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}
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return object;
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}
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