Function

GLibCompareDataFunc

Declaration

gint
(* GCompareDataFunc) (
  gconstpointer a,
  gconstpointer b,
  gpointer user_data
)

Description

Specifies the type of a comparison function used to compare two values. The function should return a negative integer if the first value comes before the second, 0 if they are equal, or a positive integer if the first value comes after the second.

Parameters

`a`	`gconstpointer`
	A value.
	The argument can be `NULL`.
`b`	`gconstpointer`
	A value to compare with.
	The argument can be `NULL`.
`user_data`	`gpointer`
	User data.
	The argument can be `NULL`.

Return value

Returns:	`gint`
	Negative value if `a` < `b`; zero if `a` = `b`; positive value if `a` > `b`.