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cJSON_Duplicate: goto fail error handling

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Simplify error handling using goto fail and improve some names.
This commit is contained in:
Max Bruckner 2017-02-07 00:24:21 +01:00
parent 021b174ee1
commit cc514583cc
1 changed files with 25 additions and 19 deletions
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44
cJSON.c
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@ -2316,20 +2316,20 @@ cJSON *cJSON_CreateStringArray(const char **strings, int count)
cJSON *cJSON_Duplicate(const cJSON *item, cjbool recurse)
{
cJSON *newitem = NULL;
cJSON *cptr = NULL;
cJSON *nptr = NULL;
cJSON *child = NULL;
cJSON *next = NULL;
cJSON *newchild = NULL;
/* Bail on bad ptr */
if (!item)
{
return NULL;
goto fail;
}
/* Create new item */
newitem = cJSON_New_Item();
if (!newitem)
{
return NULL;
goto fail;
}
/* Copy over all vars */
newitem->type = item->type & (~cJSON_IsReference);
@ -2340,8 +2340,7 @@ cJSON *cJSON_Duplicate(const cJSON *item, cjbool recurse)
newitem->valuestring = (char*)cJSON_strdup((unsigned char*)item->valuestring);
if (!newitem->valuestring)
{
cJSON_Delete(newitem);
return NULL;
goto fail;
}
}
if (item->string)
@ -2349,8 +2348,7 @@ cJSON *cJSON_Duplicate(const cJSON *item, cjbool recurse)
newitem->string = (item->type&cJSON_StringIsConst) ? item->string : (char*)cJSON_strdup((unsigned char*)item->string);
if (!newitem->string)
{
cJSON_Delete(newitem);
return NULL;
goto fail;
}
}
/* If non-recursive, then we're done! */
@ -2359,31 +2357,39 @@ cJSON *cJSON_Duplicate(const cJSON *item, cjbool recurse)
return newitem;
}
/* Walk the ->next chain for the child. */
cptr = item->child;
while (cptr)
child = item->child;
while (child != NULL)
{
newchild = cJSON_Duplicate(cptr, 1); /* Duplicate (with recurse) each item in the ->next chain */
newchild = cJSON_Duplicate(child, true); /* Duplicate (with recurse) each item in the ->next chain */
if (!newchild)
{
cJSON_Delete(newitem);
return NULL;
goto fail;
}
if (nptr)
if (next != NULL)
{
/* If newitem->child already set, then crosswire ->prev and ->next and move on */
nptr->next = newchild;
newchild->prev = nptr;
nptr = newchild;
next->next = newchild;
newchild->prev = next;
next = newchild;
}
else
{
/* Set newitem->child and move to it */
newitem->child = newchild; nptr = newchild;
newitem->child = newchild;
next = newchild;
}
cptr = cptr->next;
child = child->next;
}
return newitem;
fail:
if (newitem != NULL)
{
cJSON_Delete(newitem);
}
return NULL;
}
void cJSON_Minify(char *json)