1b17e76665
2000-07-09 Elena Zannoni <ezannoni@kwikemart.cygnus.com> * Import of readline 4.1. Locally modified files: Makefile.in, configure.in, configure (regenerated), config.h.in (regenerated), readline.h, rltty.c, shell.c signals.c. Locally added files: acconfig.h, config/*, config.h.bot, cross-build/*, doc/inc-hit.texinfo. New files: USAGE, rlprivate.h, rlshell.h, xmalloc.h. examples: 2000-07-09 Elena Zannoni <ezannoni@kwikemart.cygnus.com> * Import of readline 4.1. New files: excallback.c, rlfe.c. doc: 2000-07-09 Elena Zannoni <ezannoni@kwikemart.cygnus.com> * Import of readline 4.1. Regenerated inc-hist.texinfo as copy of hsuser.texinfo, for inclusion in the gdb manual. New file: rluserman.texinfo
424 lines
10 KiB
C
424 lines
10 KiB
C
/* search.c - code for non-incremental searching in emacs and vi modes. */
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/* Copyright (C) 1992 Free Software Foundation, Inc.
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This file is part of the Readline Library (the Library), a set of
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routines for providing Emacs style line input to programs that ask
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for it.
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The Library 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, or (at your option)
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any later version.
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The Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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The GNU General Public License is often shipped with GNU software, and
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is generally kept in a file called COPYING or LICENSE. If you do not
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have a copy of the license, write to the Free Software Foundation,
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59 Temple Place, Suite 330, Boston, MA 02111 USA. */
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#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
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# include <config.h>
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#endif
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#include <sys/types.h>
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#include <stdio.h>
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#if defined (HAVE_STDLIB_H)
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# include <stdlib.h>
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#else
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# include "ansi_stdlib.h"
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#endif
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#include "rldefs.h"
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#include "readline.h"
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#include "history.h"
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#include "rlprivate.h"
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#include "xmalloc.h"
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#ifdef abs
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# undef abs
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#endif
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#define abs(x) (((x) >= 0) ? (x) : -(x))
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extern HIST_ENTRY *saved_line_for_history;
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/* Functions imported from the rest of the library. */
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extern int _rl_free_history_entry __P((HIST_ENTRY *));
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static char *noninc_search_string = (char *) NULL;
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static int noninc_history_pos;
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static char *prev_line_found = (char *) NULL;
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static int rl_history_search_len;
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static int rl_history_search_pos;
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static char *history_search_string;
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static int history_string_size;
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/* Make the data from the history entry ENTRY be the contents of the
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current line. This doesn't do anything with rl_point; the caller
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must set it. */
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static void
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make_history_line_current (entry)
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HIST_ENTRY *entry;
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{
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int line_len;
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line_len = strlen (entry->line);
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if (line_len >= rl_line_buffer_len)
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rl_extend_line_buffer (line_len);
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strcpy (rl_line_buffer, entry->line);
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rl_undo_list = (UNDO_LIST *)entry->data;
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rl_end = line_len;
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if (saved_line_for_history)
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_rl_free_history_entry (saved_line_for_history);
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saved_line_for_history = (HIST_ENTRY *)NULL;
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}
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/* Search the history list for STRING starting at absolute history position
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POS. If STRING begins with `^', the search must match STRING at the
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beginning of a history line, otherwise a full substring match is performed
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for STRING. DIR < 0 means to search backwards through the history list,
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DIR >= 0 means to search forward. */
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static int
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noninc_search_from_pos (string, pos, dir)
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char *string;
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int pos, dir;
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{
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int ret, old;
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old = where_history ();
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history_set_pos (pos);
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if (*string == '^')
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ret = history_search_prefix (string + 1, dir);
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else
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ret = history_search (string, dir);
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if (ret != -1)
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ret = where_history ();
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history_set_pos (old);
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return (ret);
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}
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/* Search for a line in the history containing STRING. If DIR is < 0, the
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search is backwards through previous entries, else through subsequent
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entries. */
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static void
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noninc_dosearch (string, dir)
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char *string;
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int dir;
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{
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int oldpos, pos;
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HIST_ENTRY *entry;
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if (string == 0 || *string == '\0' || noninc_history_pos < 0)
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{
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ding ();
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return;
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}
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pos = noninc_search_from_pos (string, noninc_history_pos + dir, dir);
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if (pos == -1)
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{
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/* Search failed, current history position unchanged. */
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maybe_unsave_line ();
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rl_clear_message ();
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rl_point = 0;
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ding ();
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return;
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}
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noninc_history_pos = pos;
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oldpos = where_history ();
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history_set_pos (noninc_history_pos);
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entry = current_history ();
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#if defined (VI_MODE)
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if (rl_editing_mode != vi_mode)
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#endif
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history_set_pos (oldpos);
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make_history_line_current (entry);
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rl_point = 0;
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rl_clear_message ();
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}
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/* Search non-interactively through the history list. DIR < 0 means to
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search backwards through the history of previous commands; otherwise
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the search is for commands subsequent to the current position in the
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history list. PCHAR is the character to use for prompting when reading
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the search string; if not specified (0), it defaults to `:'. */
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static void
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noninc_search (dir, pchar)
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int dir;
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int pchar;
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{
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int saved_point, c;
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char *p;
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maybe_save_line ();
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saved_point = rl_point;
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/* Use the line buffer to read the search string. */
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rl_line_buffer[0] = 0;
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rl_end = rl_point = 0;
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p = _rl_make_prompt_for_search (pchar ? pchar : ':');
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rl_message (p, 0, 0);
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free (p);
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#define SEARCH_RETURN rl_restore_prompt (); return
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/* Read the search string. */
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while (c = rl_read_key ())
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{
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switch (c)
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{
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case CTRL('H'):
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case RUBOUT:
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if (rl_point == 0)
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{
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maybe_unsave_line ();
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rl_clear_message ();
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rl_point = saved_point;
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SEARCH_RETURN;
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}
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rl_rubout (1, c);
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break;
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case CTRL('W'):
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rl_unix_word_rubout (1, c);
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break;
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case CTRL('U'):
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rl_unix_line_discard (1, c);
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break;
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case RETURN:
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case NEWLINE:
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goto dosearch;
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/* NOTREACHED */
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break;
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case CTRL('C'):
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case CTRL('G'):
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maybe_unsave_line ();
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rl_clear_message ();
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rl_point = saved_point;
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ding ();
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SEARCH_RETURN;
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default:
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rl_insert (1, c);
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break;
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}
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(*rl_redisplay_function) ();
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}
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dosearch:
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/* If rl_point == 0, we want to re-use the previous search string and
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start from the saved history position. If there's no previous search
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string, punt. */
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if (rl_point == 0)
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{
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if (!noninc_search_string)
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{
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ding ();
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SEARCH_RETURN;
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}
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}
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else
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{
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/* We want to start the search from the current history position. */
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noninc_history_pos = where_history ();
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FREE (noninc_search_string);
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noninc_search_string = savestring (rl_line_buffer);
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}
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rl_restore_prompt ();
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noninc_dosearch (noninc_search_string, dir);
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}
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/* Search forward through the history list for a string. If the vi-mode
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code calls this, KEY will be `?'. */
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int
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rl_noninc_forward_search (count, key)
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int count, key;
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{
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noninc_search (1, (key == '?') ? '?' : 0);
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return 0;
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}
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/* Reverse search the history list for a string. If the vi-mode code
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calls this, KEY will be `/'. */
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int
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rl_noninc_reverse_search (count, key)
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int count, key;
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{
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noninc_search (-1, (key == '/') ? '/' : 0);
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return 0;
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}
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/* Search forward through the history list for the last string searched
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for. If there is no saved search string, abort. */
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int
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rl_noninc_forward_search_again (count, key)
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int count, key;
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{
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if (!noninc_search_string)
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{
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ding ();
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return (-1);
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}
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noninc_dosearch (noninc_search_string, 1);
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return 0;
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}
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/* Reverse search in the history list for the last string searched
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for. If there is no saved search string, abort. */
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int
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rl_noninc_reverse_search_again (count, key)
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int count, key;
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{
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if (!noninc_search_string)
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{
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ding ();
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return (-1);
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}
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noninc_dosearch (noninc_search_string, -1);
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return 0;
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}
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static int
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rl_history_search_internal (count, dir)
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int count, dir;
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{
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HIST_ENTRY *temp;
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int ret, oldpos;
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maybe_save_line ();
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temp = (HIST_ENTRY *)NULL;
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/* Search COUNT times through the history for a line whose prefix
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matches history_search_string. When this loop finishes, TEMP,
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if non-null, is the history line to copy into the line buffer. */
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while (count)
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{
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ret = noninc_search_from_pos (history_search_string, rl_history_search_pos + dir, dir);
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if (ret == -1)
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break;
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/* Get the history entry we found. */
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rl_history_search_pos = ret;
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oldpos = where_history ();
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history_set_pos (rl_history_search_pos);
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temp = current_history ();
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history_set_pos (oldpos);
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/* Don't find multiple instances of the same line. */
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if (prev_line_found && STREQ (prev_line_found, temp->line))
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continue;
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prev_line_found = temp->line;
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count--;
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}
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/* If we didn't find anything at all, return. */
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if (temp == 0)
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{
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maybe_unsave_line ();
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ding ();
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/* If you don't want the saved history line (last match) to show up
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in the line buffer after the search fails, change the #if 0 to
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#if 1 */
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#if 0
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if (rl_point > rl_history_search_len)
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{
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rl_point = rl_end = rl_history_search_len;
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rl_line_buffer[rl_end] = '\0';
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}
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#else
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rl_point = rl_history_search_len; /* maybe_unsave_line changes it */
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#endif
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return 1;
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}
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/* Copy the line we found into the current line buffer. */
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make_history_line_current (temp);
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rl_point = rl_history_search_len;
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return 0;
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}
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static void
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rl_history_search_reinit ()
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{
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rl_history_search_pos = where_history ();
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rl_history_search_len = rl_point;
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prev_line_found = (char *)NULL;
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if (rl_point)
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{
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if (rl_history_search_len >= history_string_size - 2)
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{
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history_string_size = rl_history_search_len + 2;
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history_search_string = xrealloc (history_search_string, history_string_size);
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}
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history_search_string[0] = '^';
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strncpy (history_search_string + 1, rl_line_buffer, rl_point);
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history_search_string[rl_point + 1] = '\0';
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}
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}
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/* Search forward in the history for the string of characters
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from the start of the line to rl_point. This is a non-incremental
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search. */
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int
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rl_history_search_forward (count, ignore)
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int count, ignore;
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{
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if (count == 0)
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return (0);
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if (rl_last_func != rl_history_search_forward &&
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rl_last_func != rl_history_search_backward)
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rl_history_search_reinit ();
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if (rl_history_search_len == 0)
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return (rl_get_next_history (count, ignore));
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return (rl_history_search_internal (abs (count), (count > 0) ? 1 : -1));
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}
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/* Search backward through the history for the string of characters
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from the start of the line to rl_point. This is a non-incremental
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search. */
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int
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rl_history_search_backward (count, ignore)
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int count, ignore;
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{
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if (count == 0)
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return (0);
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if (rl_last_func != rl_history_search_forward &&
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rl_last_func != rl_history_search_backward)
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rl_history_search_reinit ();
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if (rl_history_search_len == 0)
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return (rl_get_previous_history (count, ignore));
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return (rl_history_search_internal (abs (count), (count > 0) ? -1 : 1));
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}
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