122 lines
2.3 KiB
C
122 lines
2.3 KiB
C
/* X-Chat
|
|
* Copyright (C) 1998 Peter Zelezny.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include "history.h"
|
|
|
|
void
|
|
history_add (struct history *his, char *text)
|
|
{
|
|
if (his->lines[his->realpos])
|
|
free (his->lines[his->realpos]);
|
|
his->lines[his->realpos] = strdup (text);
|
|
his->realpos++;
|
|
if (his->realpos == HISTORY_SIZE)
|
|
his->realpos = 0;
|
|
his->pos = his->realpos;
|
|
}
|
|
|
|
void
|
|
history_free (struct history *his)
|
|
{
|
|
int i;
|
|
for (i = 0; i < HISTORY_SIZE; i++)
|
|
{
|
|
if (his->lines[i])
|
|
{
|
|
free (his->lines[i]);
|
|
his->lines[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
char *
|
|
history_down (struct history *his)
|
|
{
|
|
int next;
|
|
|
|
if (his->pos == his->realpos) /* allow down only after up */
|
|
return 0;
|
|
if (his->realpos == 0)
|
|
{
|
|
if (his->pos == HISTORY_SIZE - 1)
|
|
{
|
|
his->pos = 0;
|
|
return "";
|
|
}
|
|
} else
|
|
{
|
|
if (his->pos == his->realpos - 1)
|
|
{
|
|
his->pos++;
|
|
return "";
|
|
}
|
|
}
|
|
|
|
next = 0;
|
|
if (his->pos < HISTORY_SIZE - 1)
|
|
next = his->pos + 1;
|
|
|
|
if (his->lines[next])
|
|
{
|
|
his->pos = next;
|
|
return his->lines[his->pos];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
char *
|
|
history_up (struct history *his, char *current_text)
|
|
{
|
|
int next;
|
|
|
|
if (his->realpos == HISTORY_SIZE - 1)
|
|
{
|
|
if (his->pos == 0)
|
|
return 0;
|
|
} else
|
|
{
|
|
if (his->pos == his->realpos + 1)
|
|
return 0;
|
|
}
|
|
|
|
next = HISTORY_SIZE - 1;
|
|
if (his->pos != 0)
|
|
next = his->pos - 1;
|
|
|
|
if (his->lines[next])
|
|
{
|
|
if
|
|
(
|
|
current_text[0] && strcmp(current_text, his->lines[next]) &&
|
|
(!his->lines[his->pos] || strcmp(current_text, his->lines[his->pos])) &&
|
|
(!his->lines[his->realpos] || strcmp(current_text, his->lines[his->pos]))
|
|
)
|
|
{
|
|
history_add (his, current_text);
|
|
}
|
|
|
|
his->pos = next;
|
|
return his->lines[his->pos];
|
|
}
|
|
|
|
return 0;
|
|
}
|