Method

GLibSequencelookup

since: 2.28

Declaration 

GSequenceIter*
g_sequence_lookup (
  GSequence* seq,
  gpointer data,
  GCompareDataFunc cmp_func,
  gpointer cmp_data
)

Description

Returns an iterator pointing to the position of the first item found equal to data according to cmp_func and cmp_data. If more than one item is equal, it is not guaranteed that it is the first which is returned. In that case, you can use g_sequence_iter_next() and g_sequence_iter_prev() to get others.

cmp_func is called with two items of the seq, and cmp_data. It should return 0 if the items are equal, a negative value if the first item comes before the second, and a positive value if the second item comes before the first.

This function will fail if the data contained in the sequence is unsorted.

Available since: 2.28

Parameters

data

Type: gpointer

Data to look up.

The argument can be NULL.
The data is owned by the caller of the function.
cmp_func

Type: GCompareDataFunc

The function used to compare items in the sequence.

cmp_data

Type: gpointer

User data passed to cmp_func.

The argument can be NULL.
The data is owned by the caller of the function.

Return value

Type: GSequenceIter

An GSequenceIter pointing to the position of the first item found equal to data according to cmp_func and cmp_data, or NULL if no such item exists.

The data is owned by the instance.
The return value can be NULL.