105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/*===========================================================================
|
|
Copyright (c) 1998-2000, The Santa Cruz Operation
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
*Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions and the following disclaimer.
|
|
|
|
*Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
|
|
*Neither name of The Santa Cruz Operation nor the names of its contributors
|
|
may be used to endorse or promote products derived from this software
|
|
without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
|
|
IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
|
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION)
|
|
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
|
|
DAMAGE.
|
|
=========================================================================*/
|
|
|
|
/* cscope - interactive C symbol or text cross-reference
|
|
*
|
|
* command history
|
|
*/
|
|
|
|
#include "global.h"
|
|
|
|
|
|
|
|
static struct cmd *tail, *current;
|
|
|
|
/* add a cmd to the history list */
|
|
void
|
|
addcmd(int f, char *s) /* field number and command text */
|
|
{
|
|
struct cmd *h;
|
|
|
|
h = malloc(sizeof(struct cmd));
|
|
if( tail) {
|
|
tail->next = h;
|
|
h->next = 0;
|
|
h->prev = tail;
|
|
tail = h;
|
|
} else {
|
|
tail = h;
|
|
h->next = h->prev = 0;
|
|
}
|
|
h->field = f;
|
|
h->text = strdup( s);
|
|
current = 0;
|
|
}
|
|
|
|
/* return previous history item */
|
|
struct cmd *
|
|
prevcmd(void)
|
|
{
|
|
if( current) {
|
|
if( current->prev) /* stay on first item */
|
|
return current = current->prev;
|
|
else
|
|
return current;
|
|
} else if( tail)
|
|
return current = tail;
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
/* return next history item */
|
|
struct cmd *
|
|
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;
|
|
}
|
|
|
|
struct cmd *
|
|
currentcmd(void)
|
|
{
|
|
return current;
|
|
}
|