/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1999 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* cscope - interactive C symbol or text cross-reference
*
* command history
*/
#include <stdio.h>
#include "global.h"
HISTORY *head, *tail, *current;
/* add a cmd to the history list */
void
addcmd(int f, char *s)
{
HISTORY *h;
h = (HISTORY *)mymalloc(sizeof (HISTORY));
if (tail) {
tail->next = h;
h->next = 0;
h->previous = tail;
tail = h;
} else {
head = tail = h;
h->next = h->previous = 0;
}
h->field = f;
h->text = stralloc(s);
current = 0;
}
/* return previous history item */
HISTORY *
prevcmd(void)
{
if (current) {
if (current->previous) /* stay on first item */
return (current = current->previous);
else
return (current);
} else if (tail)
return (current = tail);
else
return (NULL);
}
/* return next history item */
HISTORY *
nextcmd(void)
{
if (current) {
if (current->next) /* stay on first item */
return (current = current->next);
else
return (current);
} else
return (NULL);
}
/* reset current to tail */
void
resetcmd(void)
{
current = 0;
}
HISTORY *
currentcmd(void)
{
return (current);
}