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Internal function get_array_item

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This commit is contained in:
Max Bruckner 2017-05-02 00:14:02 +02:00
parent acb0ca88df
commit 33193ea557
2 changed files with 49 additions and 40 deletions
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87
cJSON.c
View File

@ -1665,16 +1665,33 @@ CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array)
return (int)i;
}
CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int item)
static cJSON* get_array_item(const cJSON *array, size_t index)
{
cJSON *c = array ? array->child : NULL;
while (c && item > 0)
cJSON *current_child = NULL;
if (array == NULL)
{
item--;
c = c->next;
return NULL;
}
return c;
current_child = array->child;
while ((current_child != NULL) && (index > 0))
{
index--;
current_child = current_child->next;
}
return current_child;
}
CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index)
{
if (index < 0)
{
return NULL;
}
return get_array_item(array, (size_t)index);
}
static cJSON *get_object_item(const cJSON * const object, const char * const name, const cJSON_bool case_sensitive)
@ -1844,17 +1861,6 @@ CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const it
return item;
}
static cJSON *DetachItemFromArray(cJSON *array, size_t which)
{
cJSON *c = array->child;
while (c && (which > 0))
{
c = c->next;
which--;
}
return cJSON_DetachItemViaPointer(array, c);
}
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which)
{
if (which < 0)
@ -1862,7 +1868,7 @@ CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which)
return NULL;
}
return DetachItemFromArray(array, (size_t)which);
return cJSON_DetachItemViaPointer(array, get_array_item(array, (size_t)which));
}
CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which)
@ -1889,21 +1895,24 @@ CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string)
/* Replace array/object items with new ones. */
CJSON_PUBLIC(void) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem)
{
cJSON *c = array->child;
while (c && (which > 0))
cJSON *after_inserted = NULL;
if (which < 0)
{
c = c->next;
which--;
return;
}
if (!c)
after_inserted = get_array_item(array, (size_t)which);
if (after_inserted == NULL)
{
cJSON_AddItemToArray(array, newitem);
return;
}
newitem->next = c;
newitem->prev = c->prev;
c->prev = newitem;
if (c == array->child)
newitem->next = after_inserted;
newitem->prev = after_inserted->prev;
after_inserted->prev = newitem;
if (after_inserted == array->child)
{
array->child = newitem;
}
@ -1915,23 +1924,20 @@ CJSON_PUBLIC(void) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newit
static void ReplaceItemInArray(cJSON *array, size_t which, cJSON *newitem)
{
cJSON *c = array->child;
while (c && (which > 0))
{
c = c->next;
which--;
}
if (!c)
cJSON *replaced = get_array_item(array, which);
if (replaced == NULL)
{
return;
}
newitem->next = c->next;
newitem->prev = c->prev;
newitem->next = replaced->next;
newitem->prev = replaced->prev;
if (newitem->next)
{
newitem->next->prev = newitem;
}
if (c == array->child)
if (replaced == array->child)
{
array->child = newitem;
}
@ -1939,8 +1945,11 @@ static void ReplaceItemInArray(cJSON *array, size_t which, cJSON *newitem)
{
newitem->prev->next = newitem;
}
c->next = c->prev = NULL;
cJSON_Delete(c);
replaced->next = NULL;
replaced->prev = NULL;
cJSON_Delete(replaced);
}
CJSON_PUBLIC(void) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem)
{

2
cJSON.h
View File

@ -153,7 +153,7 @@ CJSON_PUBLIC(void) cJSON_Delete(cJSON *c);
/* Returns the number of items in an array (or object). */
CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array);
/* Retrieve item number "item" from array "array". Returns NULL if unsuccessful. */
CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int item);
CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index);
/* Get item "string" from object. Case insensitive. */
CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON *object, const char *string);
CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string);