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reformatting: cJSONUtils_CompareToPatch

This commit is contained in:
Max Bruckner 2016-10-17 17:35:49 +07:00
parent 52e53acfc3
commit 8879ed5dbc
1 changed files with 88 additions and 52 deletions
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140
cJSON_Utils.c
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@ -509,64 +509,100 @@ void cJSONUtils_AddPatchToArray(cJSON *array, const char *op, const char *path,
cJSONUtils_GeneratePatch(array, op, path, 0, val);
}
static void cJSONUtils_CompareToPatch(cJSON *patches,const char *path,cJSON *from,cJSON *to)
static void cJSONUtils_CompareToPatch(cJSON *patches, const char *path, cJSON *from, cJSON *to)
{
if (from->type!=to->type) {cJSONUtils_GeneratePatch(patches,"replace",path,0,to); return; }
switch (from->type)
{
case cJSON_Number:
if (from->valueint!=to->valueint || from->valuedouble!=to->valuedouble)
cJSONUtils_GeneratePatch(patches,"replace",path,0,to);
return;
case cJSON_String:
if (strcmp(from->valuestring,to->valuestring)!=0)
cJSONUtils_GeneratePatch(patches,"replace",path,0,to);
return;
if (from->type != to->type)
{
cJSONUtils_GeneratePatch(patches, "replace", path, 0, to);
return;
}
case cJSON_Array:
{
int c;char *newpath=(char*)malloc(strlen(path)+23); /* Allow space for 64bit int. */
for (c=0,from=from->child,to=to->child;from && to;from=from->next,to=to->next,c++){
sprintf(newpath,"%s/%d",path,c); cJSONUtils_CompareToPatch(patches,newpath,from,to);
}
for (;from;from=from->next,c++) {sprintf(newpath,"%d",c); cJSONUtils_GeneratePatch(patches,"remove",path,newpath,0); }
for (;to;to=to->next,c++) cJSONUtils_GeneratePatch(patches,"add",path,"-",to);
free(newpath);
return;
}
switch (from->type)
{
case cJSON_Number:
if ((from->valueint != to->valueint) || (from->valuedouble != to->valuedouble))
{
cJSONUtils_GeneratePatch(patches, "replace", path, 0, to);
}
return;
case cJSON_Object:
{
cJSON *a,*b;
cJSONUtils_SortObject(from);
cJSONUtils_SortObject(to);
a=from->child,b=to->child;
while (a || b)
{
int diff=(!a)?1:(!b)?-1:cJSONUtils_strcasecmp(a->string,b->string);
if (!diff)
{
char *newpath=(char*)malloc(strlen(path)+cJSONUtils_PointerEncodedstrlen(a->string)+2);
cJSONUtils_PointerEncodedstrcpy(newpath+sprintf(newpath,"%s/",path),a->string);
cJSONUtils_CompareToPatch(patches,newpath,a,b);
free(newpath);
a=a->next;
b=b->next;
}
else if (diff<0) {cJSONUtils_GeneratePatch(patches,"remove",path,a->string,0); a=a->next;}
else {cJSONUtils_GeneratePatch(patches,"add",path,b->string,b); b=b->next;}
}
return;
}
case cJSON_String:
if (strcmp(from->valuestring, to->valuestring) != 0)
{
cJSONUtils_GeneratePatch(patches, "replace", path, 0, to);
}
return;
default: break;
}
case cJSON_Array:
{
int c;
char *newpath = (char*)malloc(strlen(path) + 23); /* Allow space for 64bit int. */
/* generate patches for all array elements that exist in "from" and "to" */
for (c = 0, from = from->child, to = to->child; from && to; from = from->next, to = to->next, c++)
{
sprintf(newpath, "%s/%d", path, c); /* path of the current array element */
cJSONUtils_CompareToPatch(patches, newpath, from, to);
}
/* remove leftover elements from 'from' that are not in 'to' */
for (; from; from = from->next, c++)
{
sprintf(newpath, "%d", c);
cJSONUtils_GeneratePatch(patches, "remove", path, newpath, 0);
}
/* add new elements in 'to' that were not in 'from' */
for (; to; to = to->next, c++)
{
cJSONUtils_GeneratePatch(patches, "add", path, "-", to);
}
free(newpath);
return;
}
case cJSON_Object:
{
cJSON *a;
cJSON *b;
cJSONUtils_SortObject(from);
cJSONUtils_SortObject(to);
a = from->child;
b = to->child;
/* for all object values in the object with more of them */
while (a || b)
{
int diff = (!a) ? 1 : ((!b) ? -1 : cJSONUtils_strcasecmp(a->string, b->string));
if (!diff)
{
/* both object keys are the same */
char *newpath = (char*)malloc(strlen(path) + cJSONUtils_PointerEncodedstrlen(a->string) + 2);
cJSONUtils_PointerEncodedstrcpy(newpath + sprintf(newpath, "%s/", path), a->string);
/* create a patch for the element */
cJSONUtils_CompareToPatch(patches, newpath, a, b);
free(newpath);
a = a->next;
b = b->next;
}
else if (diff < 0)
{
/* object element doesn't exist in 'to' --> remove it */
cJSONUtils_GeneratePatch(patches, "remove", path, a->string, 0);
a = a->next;
}
else
{
/* object element doesn't exist in 'from' --> add it */
cJSONUtils_GeneratePatch(patches, "add", path, b->string, b);
b = b->next;
}
}
return;
}
default:
break;
}
}
cJSON* cJSONUtils_GeneratePatches(cJSON *from,cJSON *to)
{
cJSON *patches=cJSON_CreateArray();