122 lines
2.3 KiB
C
122 lines
2.3 KiB
C
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/* X-Chat
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* Copyright (C) 1998 Peter Zelezny.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "history.h"
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void
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history_add (struct history *his, char *text)
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{
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if (his->lines[his->realpos])
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free (his->lines[his->realpos]);
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his->lines[his->realpos] = strdup (text);
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his->realpos++;
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if (his->realpos == HISTORY_SIZE)
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his->realpos = 0;
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his->pos = his->realpos;
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}
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void
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history_free (struct history *his)
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{
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int i;
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for (i = 0; i < HISTORY_SIZE; i++)
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{
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if (his->lines[i])
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{
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free (his->lines[i]);
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his->lines[i] = 0;
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}
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}
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}
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char *
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history_down (struct history *his)
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{
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int next;
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if (his->pos == his->realpos) /* allow down only after up */
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return 0;
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if (his->realpos == 0)
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{
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if (his->pos == HISTORY_SIZE - 1)
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{
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his->pos = 0;
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return "";
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}
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} else
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{
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if (his->pos == his->realpos - 1)
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{
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his->pos++;
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return "";
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}
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}
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next = 0;
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if (his->pos < HISTORY_SIZE - 1)
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next = his->pos + 1;
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if (his->lines[next])
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{
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his->pos = next;
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return his->lines[his->pos];
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}
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return 0;
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}
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char *
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history_up (struct history *his, char *current_text)
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{
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int next;
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if (his->realpos == HISTORY_SIZE - 1)
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{
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if (his->pos == 0)
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return 0;
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} else
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{
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if (his->pos == his->realpos + 1)
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return 0;
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}
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next = HISTORY_SIZE - 1;
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if (his->pos != 0)
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next = his->pos - 1;
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if (his->lines[next])
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{
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if
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(
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current_text[0] && strcmp(current_text, his->lines[next]) &&
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(!his->lines[his->pos] || strcmp(current_text, his->lines[his->pos])) &&
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(!his->lines[his->realpos] || strcmp(current_text, his->lines[his->pos]))
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)
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{
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history_add (his, current_text);
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}
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his->pos = next;
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return his->lines[his->pos];
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}
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return 0;
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}
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