106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/*===========================================================================
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Copyright (c) 1998-2000, The Santa Cruz Operation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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*Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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*Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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*Neither name of The Santa Cruz Operation nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
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IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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DAMAGE.
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=========================================================================*/
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/* cscope - interactive C symbol or text cross-reference
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*
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* command history
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*/
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#include "global.h"
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#include "alloc.h"
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static char const rcsid[] = "$Id: history.c,v 1.3 2006/07/23 20:59:20 broeker Exp $";
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static struct cmd *tail, *current;
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/* add a cmd to the history list */
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void
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addcmd(int f, char *s) /* field number and command text */
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{
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struct cmd *h;
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h = mymalloc(sizeof(struct cmd));
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if( tail) {
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tail->next = h;
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h->next = 0;
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h->prev = tail;
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tail = h;
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} else {
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tail = h;
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h->next = h->prev = 0;
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}
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h->field = f;
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h->text = my_strdup( s);
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current = 0;
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}
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/* return previous history item */
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struct cmd *
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prevcmd(void)
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{
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if( current) {
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if( current->prev) /* stay on first item */
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return current = current->prev;
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else
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return current;
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} else if( tail)
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return current = tail;
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else
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return NULL;
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}
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/* return next history item */
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struct cmd *
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nextcmd(void)
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{
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if( current) {
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if( current->next) /* stay on first item */
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return current = current->next;
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else
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return current;
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} else
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return NULL;
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}
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/* reset current to tail */
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void
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resetcmd(void)
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{
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current = 0;
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}
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struct cmd *
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currentcmd(void)
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{
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return current;
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}
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