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Diffstat (limited to 'contrib/libreadline/search.c')
-rw-r--r-- | contrib/libreadline/search.c | 571 |
1 files changed, 0 insertions, 571 deletions
diff --git a/contrib/libreadline/search.c b/contrib/libreadline/search.c deleted file mode 100644 index 33cc4fc1e7369..0000000000000 --- a/contrib/libreadline/search.c +++ /dev/null @@ -1,571 +0,0 @@ -/* search.c - code for non-incremental searching in emacs and vi modes. */ - -/* Copyright (C) 1992-2005 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 2, 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, - 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ -#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)); -} |