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reformatting: cJSONUtils_GenerateMergePatch

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This commit is contained in:
Max Bruckner 2016-10-29 22:15:49 +07:00
parent 01a813f642
commit c0b17dc651
1 changed files with 53 additions and 29 deletions
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82
cJSON_Utils.c
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@ -756,34 +756,58 @@ cJSON* cJSONUtils_MergePatch(cJSON *target, cJSON *patch)
return target;
}
cJSON *cJSONUtils_GenerateMergePatch(cJSON *from,cJSON *to)
cJSON *cJSONUtils_GenerateMergePatch(cJSON *from, cJSON *to)
{
cJSON *patch=0;
if (!to) return cJSON_CreateNull();
if (to->type!=cJSON_Object || !from || from->type!=cJSON_Object) return cJSON_Duplicate(to,1);
cJSONUtils_SortObject(from);
cJSONUtils_SortObject(to);
from=from->child;to=to->child;
patch=cJSON_CreateObject();
while (from || to)
{
int compare=from?(to?strcmp(from->string,to->string):-1):1;
if (compare<0)
{
cJSON_AddItemToObject(patch,from->string,cJSON_CreateNull());
from=from->next;
}
else if (compare>0)
{
cJSON_AddItemToObject(patch,to->string,cJSON_Duplicate(to,1));
to=to->next;
}
else
{
if (cJSONUtils_Compare(from,to)) cJSON_AddItemToObject(patch,to->string,cJSONUtils_GenerateMergePatch(from,to));
from=from->next;to=to->next;
}
}
if (!patch->child) {cJSON_Delete(patch);return 0;}
return patch;
cJSON *patch = 0;
if (!to)
{
/* patch to delete everything */
return cJSON_CreateNull();
}
if ((to->type != cJSON_Object) || !from || (from->type != cJSON_Object))
{
return cJSON_Duplicate(to, 1);
}
cJSONUtils_SortObject(from);
cJSONUtils_SortObject(to);
from = from->child;
to = to->child;
patch = cJSON_CreateObject();
while (from || to)
{
int compare = from ? (to ? strcmp(from->string, to->string) : -1) : 1;
if (compare < 0)
{
/* from has a value that to doesn't have -> remove */
cJSON_AddItemToObject(patch, from->string, cJSON_CreateNull());
from = from->next;
}
else if (compare > 0)
{
/* to has a value that from doesn't have -> add to patch */
cJSON_AddItemToObject(patch, to->string, cJSON_Duplicate(to, 1));
to = to->next;
}
else
{
/* object key exists in both objects */
if (cJSONUtils_Compare(from, to))
{
/* not identical --> generate a patch */
cJSON_AddItemToObject(patch, to->string, cJSONUtils_GenerateMergePatch(from, to));
}
/* next key in the object */
from = from->next;
to = to->next;
}
}
if (!patch->child)
{
cJSON_Delete(patch);
return 0;
}
return patch;
}