static int cJSONUtils_ApplyPatch(cJSON *object, cJSON *patch)
{
cJSON *op = 0;
cJSON *path = 0;
cJSON *value = 0;
cJSON *parent = 0;
int opcode = 0;
char *parentptr = 0;
char *childptr = 0;
op = cJSON_GetObjectItem(patch, "op");
path = cJSON_GetObjectItem(patch, "path");
if (!op || !path)
{
/* malformed patch. */
return 2;
}
/* decode operation */
if (!strcmp(op->valuestring, "add"))
{
opcode = 0;
}
else if (!strcmp(op->valuestring, "remove"))
{
opcode = 1;
}
else if (!strcmp(op->valuestring, "replace"))
{
opcode = 2;
}
else if (!strcmp(op->valuestring, "move"))
{
opcode = 3;
}
else if (!strcmp(op->valuestring, "copy"))
{
opcode = 4;
}
else if (!strcmp(op->valuestring, "test"))
{
/* compare value: {...} with the given path */
return cJSONUtils_Compare(cJSONUtils_GetPointer(object, path->valuestring), cJSON_GetObjectItem(patch, "value"));
}
else
{
/* unknown opcode. */
return 3;
}
/* Remove/Replace */
if ((opcode == 1) || (opcode == 2))
{
/* Get rid of old. */
cJSON_Delete(cJSONUtils_PatchDetach(object, path->valuestring));
if (opcode == 1)
{
/* For Remove, this is job done. */
return 0;
}
}
/* Copy/Move uses "from". */
if ((opcode == 3) || (opcode == 4))
{
cJSON *from = cJSON_GetObjectItem(patch, "from");
if (!from)
{
/* missing "from" for copy/move. */
return 4;
}
if (opcode == 3)
{
/* move */
value = cJSONUtils_PatchDetach(object, from->valuestring);
}
if (opcode == 4)
{
/* copy */
value = cJSONUtils_GetPointer(object, from->valuestring);
}
if (!value)
{
/* missing "from" for copy/move. */
return 5;
}
if (opcode == 4)
{
value = cJSON_Duplicate(value, 1);
}
if (!value)
{
/* out of memory for copy/move. */
return 6;
}
}
else /* Add/Replace uses "value". */
{
value = cJSON_GetObjectItem(patch, "value");
if (!value)
{
/* missing "value" for add/replace. */
return 7;
}
value = cJSON_Duplicate(value, 1);
if (!value)
{
/* out of memory for add/replace. */
return 8;
}
}
/* Now, just add "value" to "path". */
/* split pointer in parent and child */
parentptr = cJSONUtils_strdup(path->valuestring);
childptr = strrchr(parentptr, '/');
if (childptr)
{
*childptr++ = '\0';
}
parent = cJSONUtils_GetPointer(object, parentptr);
cJSONUtils_InplaceDecodePointerString(childptr);
/* add, remove, replace, move, copy, test. */
if (!parent)
{
/* Couldn't find object to add to. */
free(parentptr);
cJSON_Delete(value);
return 9;
}
else if (parent->type == cJSON_Array)
{
if (!strcmp(childptr, "-"))
{
cJSON_AddItemToArray(parent, value);
}
else
{
cJSON_InsertItemInArray(parent, atoi(childptr), value);
}
}
else if (parent->type == cJSON_Object)
{
cJSON_DeleteItemFromObject(parent, childptr);
cJSON_AddItemToObject(parent, childptr, value);
}
else
{
cJSON_Delete(value);
}
free(parentptr);
return 0;
}
static int set_value(cJSON *root, const char *json_pointer, cJSON *value)
{
if (root == NULL) {
return -1;
}
const int len = strlen(json_pointer);
int offset = 0;
if (offset == len) {
//如果为""
return -1;
}
cJSON *parent = root;
char *key = NULL;
while (1) {
free(key);
key = get_key(json_pointer, &offset);
if (key == NULL) {
return -1;
}
if (offset >= len) {
//表示没有下一个key了
break;
}
cJSON *child = NULL;
if (parent->type == cJSON_Object) {
child = cJSON_GetObjectItem(parent, key);
if (child == NULL) {
//总是创建object而不是数组
child = cJSON_CreateObject();
cJSON_AddItemToObject(parent, key, child);
} else if (child->type != cJSON_Object && child->type != cJSON_Array) {
child = cJSON_CreateObject();
cJSON_ReplaceItemInObject(parent, key, child);
} else {
//do nothing
}
} else if (parent->type == cJSON_Array) {
int index = atoi(key);
child = cJSON_GetArrayItem(parent, index);
if (child == NULL) {
//总是创建object而不是数组
child = cJSON_CreateObject();
cJSON_InsertItemInArray(parent, index, child);
} else if (child->type != cJSON_Object && child->type != cJSON_Array) {
child = cJSON_CreateObject();
cJSON_ReplaceItemInArray(parent, index, child);
} else {
//do nothing
}
} else {
//不应该执行到这里
printf("===>not impossible\n");
}
parent = child;
}
if (parent->type == cJSON_Array) {
//key必须为0 or 123,456, '-'表示添加到最后面
if (strcmp("-", key) == 0) {
cJSON_AddItemToArray(parent, value);
} else {
int index = atoi(key);
//strtol()
cJSON_InsertItemInArray(parent, index, value);
}
} else if (parent->type == cJSON_Object) {
//cJSON_AddItemToObject(parent,key,value);
cJSON *oldValue = cJSON_GetObjectItem(parent, key);
if (oldValue == NULL) {
cJSON_AddItemToObject(parent, key, value);
} else {
cJSON_ReplaceItemInObject(parent, key, value);
}
//cJSON *kk = cJSON_GetObjectItem(parent, key);
} else {
//null,number,string,boolean
//不能够添加
printf("=====>noooo\n");
}
free(key);
return 0;
}
