3party/cJSON
0
0
Fork 0
mirror of https://github.com/DaveGamble/cJSON.git synced 2024-12-28 06:30:52 +08:00
Code Issues Projects Releases Wiki Activity

reformatting: cJSON_Utils_GetPointer

Browse Source 
NOTE: This can change the assembly slightly, in my case it reordered two
instructions. This is due to the change from:

    which = (10 * which) + *pointer++ - '0';

to

    which = (10 * which) + (*pointer++ - '0');

This means that after the change, the subtraction runs before the
addition instead of after that. That shouldn't change the behavior
though.
This commit is contained in:
Max Bruckner 2016-10-14 00:18:15 +07:00
parent 158ddceab3
commit 5713edb710
1 changed files with 40 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
cJSON_Utils.c
View File

@ -146,24 +146,47 @@ char *cJSONUtils_FindPointerFromObjectTo(cJSON *object, cJSON *target)
return 0;
}
cJSON *cJSONUtils_GetPointer(cJSON *object,const char *pointer)
cJSON *cJSONUtils_GetPointer(cJSON *object, const char *pointer)
{
while (*pointer++=='/' && object)
{
if (object->type==cJSON_Array)
{
int which=0; while (*pointer>='0' && *pointer<='9') which=(10*which) + *pointer++ - '0';
if (*pointer && *pointer!='/') return 0;
object=cJSON_GetArrayItem(object,which);
}
else if (object->type==cJSON_Object)
{
object=object->child; while (object && cJSONUtils_Pstrcasecmp(object->string,pointer)) object=object->next; /* GetObjectItem. */
while (*pointer && *pointer!='/') pointer++;
}
else return 0;
}
return object;
/* follow path of the pointer */
while ((*pointer++ == '/') && object)
{
if (object->type == cJSON_Array)
{
int which = 0;
/* parse array index */
while ((*pointer >= '0') && (*pointer <= '9'))
{
which = (10 * which) + (*pointer++ - '0');
}
if (*pointer && (*pointer != '/'))
{
/* not end of string or new path token */
return 0;
}
object = cJSON_GetArrayItem(object, which);
}
else if (object->type == cJSON_Object)
{
object = object->child;
/* GetObjectItem. */
while (object && cJSONUtils_Pstrcasecmp(object->string, pointer))
{
object = object->next;
}
/* skip to the next path token or end of string */
while (*pointer && (*pointer != '/'))
{
pointer++;
}
}
else
{
return 0;
}
}
return object;
}
/* JSON Patch implementation. */