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Sprite 1984 - 1993
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List_Move.c,v
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1990-11-27
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3KB
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129 lines
head 1.3;
branch ;
access ;
symbols ;
locks ; strict;
comment @ * @;
1.3
date 90.11.27.11.06.32; author ouster; state Exp;
branches ;
next 1.2;
1.2
date 90.09.11.14.25.08; author kupfer; state Exp;
branches ;
next 1.1;
1.1
date 88.06.20.09.27.28; author ouster; state Exp;
branches ;
next ;
desc
@@
1.3
log
@Eliminated inclusion of <sys.h> (didn't work for user programs
anyway), add explicit declaration for panic.
@
text
@/*
* List_Move.c --
*
* Source code for the List_Move library procedure.
*
* Copyright 1988 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/list/RCS/List_Move.c,v 1.2 90/09/11 14:25:08 kupfer Exp Locker: ouster $ SPRITE (Berkeley)";
#endif not lint
#include <stdio.h>
#include "list.h"
extern void panic();
/*
* ----------------------------------------------------------------------------
*
* List_Move --
*
* Move the list element referenced by itemPtr to follow destPtr.
*
* Results:
* None.
*
* Side effects:
* List ordering is modified.
*
* ----------------------------------------------------------------------------
*/
void
List_Move(itemPtr, destPtr)
register List_Links *itemPtr; /* list element to be moved */
register List_Links *destPtr; /* element after which it is to be placed */
{
if (itemPtr == (List_Links *) NIL || destPtr == (List_Links *) NIL
|| !itemPtr || !destPtr) {
panic("List_Move: One of the list items is NIL.\n");
}
/*
* It is conceivable that someone will try to move a list element to
* be after itself.
*/
if (itemPtr != destPtr) {
/*
* Remove the item.
*/
itemPtr->prevPtr->nextPtr = itemPtr->nextPtr;
itemPtr->nextPtr->prevPtr = itemPtr->prevPtr;
/*
* Insert the item at its new place.
*/
itemPtr->nextPtr = destPtr->nextPtr;
itemPtr->prevPtr = destPtr;
destPtr->nextPtr->prevPtr = itemPtr;
destPtr->nextPtr = itemPtr;
}
}
@
1.2
log
@Lint.
@
text
@d17 1
a17 1
static char rcsid[] = "$Header: /sprite/src/lib/c/list/RCS/List_Move.c,v 1.1 88/06/20 09:27:28 ouster Exp Locker: kupfer $ SPRITE (Berkeley)";
a20 1
#include <sys.h>
d23 1
@
1.1
log
@Initial revision
@
text
@d17 1
a17 1
static char rcsid[] = "$Header: proto.c,v 1.2 88/03/11 08:39:08 ouster Exp $ SPRITE (Berkeley)";
d21 1
@