Function
GLibArraybinary_search
since: 2.62
Declaration [src]
gboolean
g_array_binary_search (
  GArray* array,
  gconstpointer target,
  GCompareFunc compare_func,
  guint* out_match_index
)
Description [src]
Checks whether target exists in array by performing a binary
search based on the given comparison function compare_func which
get pointers to items as arguments. If the element is found, TRUE
is returned and the element’s index is returned in out_match_index
(if non-NULL). Otherwise, FALSE is returned and out_match_index
is undefined. If target exists multiple times in array, the index
of the first instance is returned. This search is using a binary
search, so the array must absolutely be sorted to return a correct
result (if not, the function may produce false-negative).
This example defines a comparison function and search an element in a GArray:
static gint
cmpint (gconstpointer a, gconstpointer b)
{
  const gint *_a = a;
  const gint *_b = b;
  return *_a - *_b;
}
...
gint i = 424242;
guint matched_index;
gboolean result = g_array_binary_search (garray, &i, cmpint, &matched_index);
...
Available since: 2.62
This function is not directly available to language bindings.
Parameters
- array
- 
            Type: An array of gpointerA GArray.The data is owned by the caller of the function. 
- target
- 
            Type: gconstpointerA pointer to the item to look up. The argument can be NULL.The data is owned by the caller of the function. 
- compare_func
- 
            Type: GCompareFuncA GCompareFuncused to locatetarget.
- out_match_index
- 
            Type: guint*Return location for the index of the element, if found. The argument will be set by the function. The argument can be NULL.