+++ /dev/null
-/* search.c - code for non-incremental searching in emacs and vi modes. */
-
-/* Copyright (C) 1992-2009 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline 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 3 of the License, or
- (at your option) any later version.
-
- Readline 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 Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-#include <stdio.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif
-
-#include "rldefs.h"
-#include "rlmbutil.h"
-
-#include "readline.h"
-#include "history.h"
-
-#include "rlprivate.h"
-#include "xmalloc.h"
-
-#ifdef abs
-# undef abs
-#endif
-#define abs(x) (((x) >= 0) ? (x) : -(x))
-
-_rl_search_cxt *_rl_nscxt = 0;
-
-extern HIST_ENTRY *_rl_saved_line_for_history;
-
-/* Functions imported from the rest of the library. */
-extern int _rl_free_history_entry PARAMS((HIST_ENTRY *));
-
-static char *noninc_search_string = (char *) NULL;
-static int noninc_history_pos;
-
-static char *prev_line_found = (char *) NULL;
-
-static int rl_history_search_len;
-static int rl_history_search_pos;
-static char *history_search_string;
-static int history_string_size;
-
-static void make_history_line_current PARAMS((HIST_ENTRY *));
-static int noninc_search_from_pos PARAMS((char *, int, int));
-static int noninc_dosearch PARAMS((char *, int));
-static int noninc_search PARAMS((int, int));
-static int rl_history_search_internal PARAMS((int, int));
-static void rl_history_search_reinit PARAMS((void));
-
-static _rl_search_cxt *_rl_nsearch_init PARAMS((int, int));
-static int _rl_nsearch_cleanup PARAMS((_rl_search_cxt *, int));
-static void _rl_nsearch_abort PARAMS((_rl_search_cxt *));
-static int _rl_nsearch_dispatch PARAMS((_rl_search_cxt *, int));
-
-/* Make the data from the history entry ENTRY be the contents of the
- current line. This doesn't do anything with rl_point; the caller
- must set it. */
-static void
-make_history_line_current (entry)
- HIST_ENTRY *entry;
-{
- _rl_replace_text (entry->line, 0, rl_end);
- _rl_fix_point (1);
-#if defined (VI_MODE)
- if (rl_editing_mode == vi_mode)
- /* POSIX.2 says that the `U' command doesn't affect the copy of any
- command lines to the edit line. We're going to implement that by
- making the undo list start after the matching line is copied to the
- current editing buffer. */
- rl_free_undo_list ();
-#endif
-
- if (_rl_saved_line_for_history)
- _rl_free_history_entry (_rl_saved_line_for_history);
- _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
-}
-
-/* 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;
-
- if (pos < 0)
- return -1;
-
- old = where_history ();
- if (history_set_pos (pos) == 0)
- return -1;
-
- RL_SETSTATE(RL_STATE_SEARCH);
- if (*string == '^')
- ret = history_search_prefix (string + 1, dir);
- else
- ret = history_search (string, dir);
- RL_UNSETSTATE(RL_STATE_SEARCH);
-
- 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. Returns 1 if the search was successful, 0 otherwise. */
-static int
-noninc_dosearch (string, dir)
- char *string;
- int dir;
-{
- int oldpos, pos;
- HIST_ENTRY *entry;
-
- if (string == 0 || *string == '\0' || noninc_history_pos < 0)
- {
- rl_ding ();
- return 0;
- }
-
- pos = noninc_search_from_pos (string, noninc_history_pos + dir, dir);
- if (pos == -1)
- {
- /* Search failed, current history position unchanged. */
- rl_maybe_unsave_line ();
- rl_clear_message ();
- rl_point = 0;
- rl_ding ();
- return 0;
- }
-
- noninc_history_pos = pos;
-
- oldpos = where_history ();
- history_set_pos (noninc_history_pos);
- entry = current_history ();
-#if defined (VI_MODE)
- if (rl_editing_mode != vi_mode)
-#endif
- history_set_pos (oldpos);
-
- make_history_line_current (entry);
-
- rl_point = 0;
- rl_mark = rl_end;
-
- rl_clear_message ();
- return 1;
-}
-
-static _rl_search_cxt *
-_rl_nsearch_init (dir, pchar)
- int dir, pchar;
-{
- _rl_search_cxt *cxt;
- char *p;
-
- cxt = _rl_scxt_alloc (RL_SEARCH_NSEARCH, 0);
- if (dir < 0)
- cxt->sflags |= SF_REVERSE; /* not strictly needed */
-
- cxt->direction = dir;
- cxt->history_pos = cxt->save_line;
-
- rl_maybe_save_line ();
-
- /* Clear the undo list, since reading the search string should create its
- own undo list, and the whole list will end up being freed when we
- finish reading the search string. */
- rl_undo_list = 0;
-
- /* Use the line buffer to read the search string. */
- rl_line_buffer[0] = 0;
- rl_end = rl_point = 0;
-
- p = _rl_make_prompt_for_search (pchar ? pchar : ':');
- rl_message ("%s", p, 0);
- free (p);
-
- RL_SETSTATE(RL_STATE_NSEARCH);
-
- _rl_nscxt = cxt;
-
- return cxt;
-}
-
-static int
-_rl_nsearch_cleanup (cxt, r)
- _rl_search_cxt *cxt;
- int r;
-{
- _rl_scxt_dispose (cxt, 0);
- _rl_nscxt = 0;
-
- RL_UNSETSTATE(RL_STATE_NSEARCH);
-
- return (r != 1);
-}
-
-static void
-_rl_nsearch_abort (cxt)
- _rl_search_cxt *cxt;
-{
- rl_maybe_unsave_line ();
- rl_clear_message ();
- rl_point = cxt->save_point;
- rl_mark = cxt->save_mark;
- rl_restore_prompt ();
-
- RL_UNSETSTATE (RL_STATE_NSEARCH);
-}
-
-/* Process just-read character C according to search context CXT. Return -1
- if the caller should abort the search, 0 if we should break out of the
- loop, and 1 if we should continue to read characters. */
-static int
-_rl_nsearch_dispatch (cxt, c)
- _rl_search_cxt *cxt;
- int c;
-{
- switch (c)
- {
- case CTRL('W'):
- rl_unix_word_rubout (1, c);
- break;
-
- case CTRL('U'):
- rl_unix_line_discard (1, c);
- break;
-
- case RETURN:
- case NEWLINE:
- return 0;
-
- case CTRL('H'):
- case RUBOUT:
- if (rl_point == 0)
- {
- _rl_nsearch_abort (cxt);
- return -1;
- }
- _rl_rubout_char (1, c);
- break;
-
- case CTRL('C'):
- case CTRL('G'):
- rl_ding ();
- _rl_nsearch_abort (cxt);
- return -1;
-
- default:
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- rl_insert_text (cxt->mb);
- else
-#endif
- _rl_insert_char (1, c);
- break;
- }
-
- (*rl_redisplay_function) ();
- return 1;
-}
-
-/* Perform one search according to CXT, using NONINC_SEARCH_STRING. Return
- -1 if the search should be aborted, any other value means to clean up
- using _rl_nsearch_cleanup (). Returns 1 if the search was successful,
- 0 otherwise. */
-static int
-_rl_nsearch_dosearch (cxt)
- _rl_search_cxt *cxt;
-{
- rl_mark = cxt->save_mark;
-
- /* 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 == 0)
- {
- rl_ding ();
- rl_restore_prompt ();
- RL_UNSETSTATE (RL_STATE_NSEARCH);
- return -1;
- }
- }
- else
- {
- /* We want to start the search from the current history position. */
- noninc_history_pos = cxt->save_line;
- FREE (noninc_search_string);
- noninc_search_string = savestring (rl_line_buffer);
-
- /* If we don't want the subsequent undo list generated by the search
- matching a history line to include the contents of the search string,
- we need to clear rl_line_buffer here. For now, we just clear the
- undo list generated by reading the search string. (If the search
- fails, the old undo list will be restored by rl_maybe_unsave_line.) */
- rl_free_undo_list ();
- }
-
- rl_restore_prompt ();
- return (noninc_dosearch (noninc_search_string, cxt->direction));
-}
-
-/* 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 int
-noninc_search (dir, pchar)
- int dir;
- int pchar;
-{
- _rl_search_cxt *cxt;
- int c, r;
-
- cxt = _rl_nsearch_init (dir, pchar);
-
- if (RL_ISSTATE (RL_STATE_CALLBACK))
- return (0);
-
- /* Read the search string. */
- r = 0;
- while (1)
- {
- c = _rl_search_getchar (cxt);
-
- if (c == 0)
- break;
-
- r = _rl_nsearch_dispatch (cxt, c);
- if (r < 0)
- return 1;
- else if (r == 0)
- break;
- }
-
- r = _rl_nsearch_dosearch (cxt);
- return ((r >= 0) ? _rl_nsearch_cleanup (cxt, r) : (r != 1));
-}
-
-/* Search forward through the history list for a string. If the vi-mode
- code calls this, KEY will be `?'. */
-int
-rl_noninc_forward_search (count, key)
- int count, key;
-{
- return noninc_search (1, (key == '?') ? '?' : 0);
-}
-
-/* Reverse search the history list for a string. If the vi-mode code
- calls this, KEY will be `/'. */
-int
-rl_noninc_reverse_search (count, key)
- int count, key;
-{
- return noninc_search (-1, (key == '/') ? '/' : 0);
-}
-
-/* Search forward through the history list for the last string searched
- for. If there is no saved search string, abort. */
-int
-rl_noninc_forward_search_again (count, key)
- int count, key;
-{
- int r;
-
- if (!noninc_search_string)
- {
- rl_ding ();
- return (-1);
- }
- r = noninc_dosearch (noninc_search_string, 1);
- return (r != 1);
-}
-
-/* Reverse search in the history list for the last string searched
- for. If there is no saved search string, abort. */
-int
-rl_noninc_reverse_search_again (count, key)
- int count, key;
-{
- int r;
-
- if (!noninc_search_string)
- {
- rl_ding ();
- return (-1);
- }
- r = noninc_dosearch (noninc_search_string, -1);
- return (r != 1);
-}
-
-#if defined (READLINE_CALLBACKS)
-int
-_rl_nsearch_callback (cxt)
- _rl_search_cxt *cxt;
-{
- int c, r;
-
- c = _rl_search_getchar (cxt);
- r = _rl_nsearch_dispatch (cxt, c);
- if (r != 0)
- return 1;
-
- r = _rl_nsearch_dosearch (cxt);
- return ((r >= 0) ? _rl_nsearch_cleanup (cxt, r) : (r != 1));
-}
-#endif
-
-static int
-rl_history_search_internal (count, dir)
- int count, dir;
-{
- HIST_ENTRY *temp;
- int ret, oldpos;
-
- rl_maybe_save_line ();
- temp = (HIST_ENTRY *)NULL;
-
- /* Search COUNT times through the history for a line whose prefix
- matches history_search_string. When this loop finishes, TEMP,
- if non-null, is the history line to copy into the line buffer. */
- while (count)
- {
- ret = noninc_search_from_pos (history_search_string, rl_history_search_pos + dir, dir);
- if (ret == -1)
- break;
-
- /* Get the history entry we found. */
- rl_history_search_pos = ret;
- oldpos = where_history ();
- history_set_pos (rl_history_search_pos);
- temp = current_history ();
- history_set_pos (oldpos);
-
- /* Don't find multiple instances of the same line. */
- if (prev_line_found && STREQ (prev_line_found, temp->line))
- continue;
- prev_line_found = temp->line;
- count--;
- }
-
- /* If we didn't find anything at all, return. */
- if (temp == 0)
- {
- rl_maybe_unsave_line ();
- rl_ding ();
- /* If you don't want the saved history line (last match) to show up
- in the line buffer after the search fails, change the #if 0 to
- #if 1 */
-#if 0
- if (rl_point > rl_history_search_len)
- {
- rl_point = rl_end = rl_history_search_len;
- rl_line_buffer[rl_end] = '\0';
- rl_mark = 0;
- }
-#else
- rl_point = rl_history_search_len; /* rl_maybe_unsave_line changes it */
- rl_mark = rl_end;
-#endif
- return 1;
- }
-
- /* Copy the line we found into the current line buffer. */
- make_history_line_current (temp);
-
- rl_point = rl_history_search_len;
- rl_mark = rl_end;
-
- return 0;
-}
-
-static void
-rl_history_search_reinit ()
-{
- rl_history_search_pos = where_history ();
- rl_history_search_len = rl_point;
- prev_line_found = (char *)NULL;
- if (rl_point)
- {
- if (rl_history_search_len >= history_string_size - 2)
- {
- history_string_size = rl_history_search_len + 2;
- history_search_string = (char *)xrealloc (history_search_string, history_string_size);
- }
- history_search_string[0] = '^';
- strncpy (history_search_string + 1, rl_line_buffer, rl_point);
- history_search_string[rl_point + 1] = '\0';
- }
- _rl_free_saved_history_line ();
-}
-
-/* Search forward in the history for the string of characters
- from the start of the line to rl_point. This is a non-incremental
- search. */
-int
-rl_history_search_forward (count, ignore)
- int count, ignore;
-{
- if (count == 0)
- return (0);
-
- if (rl_last_func != rl_history_search_forward &&
- rl_last_func != rl_history_search_backward)
- rl_history_search_reinit ();
-
- if (rl_history_search_len == 0)
- return (rl_get_next_history (count, ignore));
- return (rl_history_search_internal (abs (count), (count > 0) ? 1 : -1));
-}
-
-/* Search backward through the history for the string of characters
- from the start of the line to rl_point. This is a non-incremental
- search. */
-int
-rl_history_search_backward (count, ignore)
- int count, ignore;
-{
- if (count == 0)
- return (0);
-
- if (rl_last_func != rl_history_search_forward &&
- rl_last_func != rl_history_search_backward)
- rl_history_search_reinit ();
-
- if (rl_history_search_len == 0)
- return (rl_get_previous_history (count, ignore));
- return (rl_history_search_internal (abs (count), (count > 0) ? -1 : 1));
-}
projects / thirdparty / bash.git / blobdiff