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refactor cJSONUtils_GetPointer

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This commit is contained in:
Max Bruckner 2017-04-30 12:57:49 +02:00
parent 4642d6575f
commit 378a333ee2
2 changed files with 13 additions and 11 deletions
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22
cJSON_Utils.c
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@ -245,12 +245,14 @@ static cJSON_bool decode_array_index_from_pointer(const unsigned char * const po
return 1; return 1;
} }
CJSON_PUBLIC(cJSON *) cJSONUtils_GetPointer(cJSON *object, const char *pointer) CJSON_PUBLIC(cJSON *) cJSONUtils_GetPointer(cJSON * const object, const char *pointer)
{ {
cJSON *current_element = object;
/* follow path of the pointer */ /* follow path of the pointer */
while ((*pointer++ == '/') && object) while ((pointer[0] == '/') && (current_element != NULL))
{ {
if (cJSON_IsArray(object)) pointer++;
if (cJSON_IsArray(current_element))
{ {
size_t index = 0; size_t index = 0;
if (!decode_array_index_from_pointer((const unsigned char*)pointer, &index)) if (!decode_array_index_from_pointer((const unsigned char*)pointer, &index))
@ -258,18 +260,18 @@ CJSON_PUBLIC(cJSON *) cJSONUtils_GetPointer(cJSON *object, const char *pointer)
return NULL; return NULL;
} }
object = get_array_item(object, index); current_element = get_array_item(current_element, index);
} }
else if (cJSON_IsObject(object)) else if (cJSON_IsObject(current_element))
{ {
object = object->child; current_element = current_element->child;
/* GetObjectItem. */ /* GetObjectItem. */
while (object && cJSONUtils_Pstrcasecmp((unsigned char*)object->string, (const unsigned char*)pointer)) while ((current_element != NULL) && cJSONUtils_Pstrcasecmp((unsigned char*)current_element->string, (const unsigned char*)pointer))
{ {
object = object->next; current_element = current_element->next;
} }
/* skip to the next path token or end of string */ /* skip to the next path token or end of string */
while (*pointer && (*pointer != '/')) while ((pointer[0] != '\0') && (pointer[0] != '/'))
{ {
pointer++; pointer++;
} }
@ -280,7 +282,7 @@ CJSON_PUBLIC(cJSON *) cJSONUtils_GetPointer(cJSON *object, const char *pointer)
} }
} }
return object; return current_element;
} }
/* JSON Patch implementation. */ /* JSON Patch implementation. */

2
cJSON_Utils.h
View File

@ -23,7 +23,7 @@
#include "cJSON.h" #include "cJSON.h"
/* Implement RFC6901 (https://tools.ietf.org/html/rfc6901) JSON Pointer spec. */ /* Implement RFC6901 (https://tools.ietf.org/html/rfc6901) JSON Pointer spec. */
CJSON_PUBLIC(cJSON *) cJSONUtils_GetPointer(cJSON *object, const char *pointer); CJSON_PUBLIC(cJSON *) cJSONUtils_GetPointer(cJSON * const object, const char *pointer);
/* Implement RFC6902 (https://tools.ietf.org/html/rfc6902) JSON Patch spec. */ /* Implement RFC6902 (https://tools.ietf.org/html/rfc6902) JSON Patch spec. */
CJSON_PUBLIC(cJSON *) cJSONUtils_GeneratePatches(cJSON *from, cJSON *to); CJSON_PUBLIC(cJSON *) cJSONUtils_GeneratePatches(cJSON *from, cJSON *to);