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/* search.c - code for non-incremental searching in emacs and vi modes. */
/* Copyright (C) 1992 Free Software Foundation, Inc.
This file is part of the Readline Library (the Library), a set of
routines for providing Emacs style line input to programs that ask
for it.
The Library 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 1, or (at your option)
any later version.
The Library 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.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
675 Mass Ave, Cambridge, MA 02139, USA. */
/* For alloca on AIX. CYGNUS LOCAL. */
#include "sysdep.h"
#include <stdio.h>
#if defined (__GNUC__)
# define alloca __builtin_alloca
#else
# if defined (sparc) || defined (HAVE_ALLOCA_H)
# include <alloca.h>
# endif
#endif
#include "readline.h"
#include "history.h"
extern char *xmalloc (), *xrealloc ();
/* Variables imported from readline.c */
extern int rl_point, rl_end, rl_line_buffer_len;
extern Keymap _rl_keymap;
extern char *rl_prompt;
extern char *rl_line_buffer;
extern HIST_ENTRY *saved_line_for_history;
static char *noninc_search_string = (char *) NULL;
static int noninc_history_pos = 0;
/* Search the history list for STRING starting at absolute history position
POS. If STRING begins with `^', the search must match STRING at the
beginning of a history line, otherwise a full substring match is performed
for STRING. DIR < 0 means to search backwards through the history list,
DIR >= 0 means to search forward. */
static int
noninc_search_from_pos (string, pos, dir)
char *string;
int pos, dir;
{
int ret, old;
old = where_history ();
history_set_pos (pos);
if (*string == '^')
ret = history_search_prefix (string + 1, dir);
else
ret = history_search (string, dir);
if (ret != -1)
ret = where_history ();
history_set_pos (old);
return (ret);
}
/* Search for a line in the history containing STRING. If DIR is < 0, the
search is backwards through previous entries, else through subsequent
entries. */
static void
noninc_dosearch (string, dir)
char *string;
int dir;
{
int oldpos, pos;
HIST_ENTRY *entry;
if (string == 0 || *string == 0 || noninc_history_pos < 0)
{
ding ();
return;
}
pos = noninc_search_from_pos (string, noninc_history_pos + dir, dir);
if (pos == -1)
{
/* Search failed, current history position unchanged. */
maybe_unsave_line ();
rl_clear_message ();
rl_point = 0;
ding ();
return;
}
noninc_history_pos = pos;
oldpos = where_history ();
history_set_pos (noninc_history_pos);
entry = current_history ();
history_set_pos (oldpos);
{
int line_len;
line_len = strlen (entry->line);
if (line_len >= rl_line_buffer_len)
rl_extend_line_buffer (line_len);
strcpy (rl_line_buffer, entry->line);
}
rl_undo_list = (UNDO_LIST *)entry->data;
rl_end = strlen (rl_line_buffer);
rl_point = 0;
rl_clear_message ();
if (saved_line_for_history)
free_history_entry (saved_line_for_history);
saved_line_for_history = (HIST_ENTRY *)NULL;
}
/* Search non-interactively through the history list. DIR < 0 means to
search backwards through the history of previous commands; otherwise
the search is for commands subsequent to the current position in the
history list. PCHAR is the character to use for prompting when reading
the search string; if not specified (0), it defaults to `:'. */
static void
noninc_search (dir, pchar)
int dir;
int pchar;
{
int saved_point, c, pmtlen;
char *p;
maybe_save_line ();
saved_point = rl_point;
/* Use the line buffer to read the search string. */
rl_line_buffer[0] = 0;
rl_end = rl_point = 0;
pmtlen = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0;
p = (char *)alloca (2 + pmtlen);
if (pmtlen)
strcpy (p, rl_prompt);
p[pmtlen] = pchar ? pchar : ':';
p[pmtlen + 1] = '\0';
rl_message (p, 0, 0);
/* Read the search string. */
while (c = rl_read_key ())
{
switch (c)
{
case CTRL('H'):
case RUBOUT:
if (rl_point == 0)
{
maybe_unsave_line ();
rl_clear_message ();
rl_point = saved_point;
return;
}
/* FALLTHROUGH */
case CTRL('W'):
case CTRL('U'):
rl_dispatch (c, _rl_keymap);
break;
case RETURN:
case NEWLINE:
goto dosearch;
/* NOTREACHED */
break;
case CTRL('C'):
case CTRL('G'):
maybe_unsave_line ();
rl_clear_message ();
rl_point = saved_point;
ding ();
return;
default:
rl_insert (1, c);
break;
}
rl_redisplay ();
}
dosearch:
/* If rl_point == 0, we want to re-use the previous search string and
start from the saved history position. If there's no previous search
string, punt. */
if (rl_point == 0)
{
if (!noninc_search_string)
{
ding ();
return;
}
}
else
{
/* We want to start the search from the current history position. */
noninc_history_pos = where_history ();
if (noninc_search_string)
free (noninc_search_string);
noninc_search_string = savestring (rl_line_buffer);
}
noninc_dosearch (noninc_search_string, dir);
}
/* Search forward through the history list for a string. If the vi-mode
code calls this, KEY will be `?'. */
rl_noninc_forward_search (count, key)
int count, key;
{
if (key == '?')
noninc_search (1, '?');
else
noninc_search (1, 0);
return 0;
}
/* Reverse search the history list for a string. If the vi-mode code
calls this, KEY will be `/'. */
rl_noninc_reverse_search (count, key)
int count, key;
{
if (key == '/')
noninc_search (-1, '/');
else
noninc_search (-1, 0);
return 0;
}
/* Search forward through the history list for the last string searched
for. If there is no saved search string, abort. */
rl_noninc_forward_search_again (count, key)
int count, key;
{
if (!noninc_search_string)
{
ding ();
return (-1);
}
noninc_dosearch (noninc_search_string, 1);
return 0;
}
/* Reverse search in the history list for the last string searched
for. If there is no saved search string, abort. */
rl_noninc_reverse_search_again (count, key)
int count, key;
{
if (!noninc_search_string)
{
ding ();
return (-1);
}
noninc_dosearch (noninc_search_string, -1);
return 0;
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.