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Sprite 1984 - 1993
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List_Insert.c,v
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1990-11-27
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4KB
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169 lines
head 1.5;
branch ;
access ;
symbols ;
locks ; strict;
comment @ * @;
1.5
date 90.11.27.11.06.20; author ouster; state Exp;
branches ;
next 1.4;
1.4
date 90.09.11.14.25.08; author kupfer; state Exp;
branches ;
next 1.3;
1.3
date 88.07.16.14.44.18; author ouster; state Exp;
branches ;
next 1.2;
1.2
date 88.07.15.17.33.42; author douglis; state Exp;
branches ;
next 1.1;
1.1
date 88.06.20.09.27.27; author ouster; state Exp;
branches ;
next ;
desc
@@
1.5
log
@Eliminated inclusion of <sys.h> (didn't work for user programs
anyway), add explicit declaration for panic.
@
text
@/*
* List_Insert.c --
*
* Source code for the List_Insert 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_Insert.c,v 1.4 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_Insert --
*
* Insert the list element pointed to by itemPtr into a List after
* destPtr. Perform a primitive test for self-looping by returning
* failure if the list element is being inserted next to itself.
*
* Results:
* None.
*
* Side effects:
* The list containing destPtr is modified to contain itemPtr.
*
* ----------------------------------------------------------------------------
*/
void
List_Insert(itemPtr, destPtr)
register List_Links *itemPtr; /* structure to insert */
register List_Links *destPtr; /* structure after which to insert it */
{
if (itemPtr == (List_Links *) NIL || destPtr == (List_Links *) NIL
|| !itemPtr || !destPtr) {
panic("List_Insert: itemPtr (%x) or destPtr (%x) is NIL.\n",
(unsigned int) itemPtr, (unsigned int) destPtr);
return;
}
if (itemPtr == destPtr) {
panic("List_Insert: trying to insert something after itself.\n");
return;
}
itemPtr->nextPtr = destPtr->nextPtr;
itemPtr->prevPtr = destPtr;
destPtr->nextPtr->prevPtr = itemPtr;
destPtr->nextPtr = itemPtr;
}
@
1.4
log
@Lint.
@
text
@d17 1
a17 1
static char rcsid[] = "$Header: /sprite/src/lib/c/list/RCS/List_Insert.c,v 1.3 88/07/16 14:44:18 ouster Exp Locker: kupfer $ SPRITE (Berkeley)";
a20 1
#include <sys.h>
d22 2
@
1.3
log
@Change Sys_Panic back to panic.
@
text
@d17 1
a17 1
static char rcsid[] = "$Header: List_Insert.c,v 1.2 88/07/15 17:33:42 douglis Exp $ SPRITE (Berkeley)";
d21 1
@
1.2
log
@changed error message to complain about NIL pointer or
inserting something after itself rather than having the single message
that inserting something would create a loop (when it might be a nil ptr).
@
text
@d17 1
a17 1
static char rcsid[] = "$Header: List_Insert.c,v 1.1 88/06/20 09:27:27 ouster Exp $ SPRITE (Berkeley)";
d47 1
a47 2
Sys_Panic(SYS_FATAL,
"List_Insert: itemPtr (%x) or destPtr (%x) is NIL.\n",
d52 1
a52 2
Sys_Panic(SYS_FATAL,
"List_Insert: trying to insert something after itself.\n");
@
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)";
d46 10
a55 2
|| !itemPtr || !destPtr || (itemPtr == destPtr)) {
panic("List_Insert: inserting this item would create a loop.\n");
@