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.\" .\" Initial implementation: .\" Copyright (c) 2002 Robert Drehmel .\" All rights reserved. .\" .\" As long as the above copyright statement and this notice remain .\" unchanged, you can do what ever you want with this file. .\" .\" $FreeBSD: release/9.1.0/lib/libc/stdlib/insque.3 111503 2003-02-25 21:59:36Z robert $ .\" .Dd October 10, 2002 .Dt INSQUE 3 .Os .Sh NAME .Nm insque , .Nm remque .Nd doubly-linked list management .Sh LIBRARY .Lb libc .Sh SYNOPSIS .In search.h .Ft void .Fn insque "void *element1" "void *pred" .Ft void .Fn remque "void *element" .Sh DESCRIPTION The .Fn insque and .Fn remque functions encapsulate the ever-repeating task of doing insertion and removal operations on doubly linked lists. The functions expect their arguments to point to a structure whose first and second members are pointers to the next and previous element, respectively. The .Fn insque function also allows the .Fa pred argument to be a .Dv NULL pointer for the initialization of a new list's head element. .Sh STANDARDS The .Fn insque and .Fn remque functions conform to .St -p1003.1-2001 . .Sh HISTORY The .Fn insque and .Fn remque functions appeared in .Bx 4.2 . In .Fx 5.0 , they reappeared conforming to .St -p1003.1-2001 .