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Diffstat (limited to 'readline/isearch.c')
| -rw-r--r-- | readline/isearch.c | 560 |
1 files changed, 0 insertions, 560 deletions
diff --git a/readline/isearch.c b/readline/isearch.c deleted file mode 100644 index 137842a841f..00000000000 --- a/readline/isearch.c +++ /dev/null @@ -1,560 +0,0 @@ -/* **************************************************************** */ -/* */ -/* I-Search and Searching */ -/* */ -/* **************************************************************** */ - -/* Copyright (C) 1987-2002 Free Software Foundation, Inc. - - This file contains 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" - -/* Variables exported to other files in the readline library. */ -char *_rl_isearch_terminators = (char *)NULL; - -/* Variables imported from other files in the readline library. */ -extern HIST_ENTRY *_rl_saved_line_for_history; - -/* Forward declarations */ -static int rl_search_history PARAMS((int, int)); - -/* Last line found by the current incremental search, so we don't `find' - identical lines many times in a row. */ -static char *prev_line_found; - -/* Last search string and its length. */ -static char *last_isearch_string; -static int last_isearch_string_len; - -static const char *default_isearch_terminators = "\033\012"; - -/* Search backwards through the history looking for a string which is typed - interactively. Start with the current line. */ -int -rl_reverse_search_history (sign, key) - int sign, key; -{ - return (rl_search_history (-sign, key)); -} - -/* Search forwards through the history looking for a string which is typed - interactively. Start with the current line. */ -int -rl_forward_search_history (sign, key) - int sign, key; -{ - return (rl_search_history (sign, key)); -} - -/* Display the current state of the search in the echo-area. - SEARCH_STRING contains the string that is being searched for, - DIRECTION is zero for forward, or 1 for reverse, - WHERE is the history list number of the current line. If it is - -1, then this line is the starting one. */ -static void -rl_display_search (search_string, reverse_p, where) - char *search_string; - int reverse_p, where __attribute__((unused)); -{ - char *message; - int msglen, searchlen; - - searchlen = (search_string && *search_string) ? strlen (search_string) : 0; - - message = (char *)xmalloc (searchlen + 33); - msglen = 0; - -#if defined (NOTDEF) - if (where != -1) - { - sprintf (message, "[%d]", where + history_base); - msglen = strlen (message); - } -#endif /* NOTDEF */ - - message[msglen++] = '('; - - if (reverse_p) - { - strcpy (message + msglen, "reverse-"); - msglen += 8; - } - - strcpy (message + msglen, "i-search)`"); - msglen += 10; - - if (search_string) - { - strcpy (message + msglen, search_string); - msglen += searchlen; - } - - strcpy (message + msglen, "': "); - - rl_message ("%s", message); - free (message); - (*rl_redisplay_function) (); -} - -/* Search through the history looking for an interactively typed string. - This is analogous to i-search. We start the search in the current line. - DIRECTION is which direction to search; >= 0 means forward, < 0 means - backwards. */ -static int -rl_search_history (direction, invoking_key) - int direction, invoking_key __attribute__((unused)); -{ - /* The string that the user types in to search for. */ - char *search_string; - - /* The current length of SEARCH_STRING. */ - int search_string_index; - - /* The amount of space that SEARCH_STRING has allocated to it. */ - int search_string_size; - - /* The list of lines to search through. */ - char **lines, *allocated_line; - - /* The length of LINES. */ - int hlen; - - /* Where we get LINES from. */ - HIST_ENTRY **hlist; - - register int i; - int orig_point, orig_mark, orig_line, last_found_line; - int c, found, failed, sline_len; - int n, wstart, wlen; -#if defined (HANDLE_MULTIBYTE) - char mb[MB_LEN_MAX]; -#endif - - /* The line currently being searched. */ - char *sline; - - /* Offset in that line. */ - int line_index; - - /* Non-zero if we are doing a reverse search. */ - int reverse; - - /* The list of characters which terminate the search, but are not - subsequently executed. If the variable isearch-terminators has - been set, we use that value, otherwise we use ESC and C-J. */ - const char *isearch_terminators; - - RL_SETSTATE(RL_STATE_ISEARCH); - orig_point = rl_point; - orig_mark = rl_mark; - last_found_line = orig_line = where_history (); - reverse = direction < 0; - hlist = history_list (); - allocated_line = (char *)NULL; - - isearch_terminators = _rl_isearch_terminators ? _rl_isearch_terminators - : default_isearch_terminators; - - /* Create an arrary of pointers to the lines that we want to search. */ - rl_maybe_replace_line (); - i = 0; - if (hlist) - for (i = 0; hlist[i]; i++); - - /* Allocate space for this many lines, +1 for the current input line, - and remember those lines. */ - lines = (char **)xmalloc ((1 + (hlen = i)) * sizeof (char *)); - for (i = 0; i < hlen; i++) - lines[i] = hlist[i]->line; - - if (_rl_saved_line_for_history) - lines[i] = _rl_saved_line_for_history->line; - else - { - /* Keep track of this so we can free it. */ - allocated_line = (char *)xmalloc (1 + strlen (rl_line_buffer)); - strcpy (allocated_line, &rl_line_buffer[0]); - lines[i] = allocated_line; - } - - hlen++; - - /* The line where we start the search. */ - i = orig_line; - - rl_save_prompt (); - - /* Initialize search parameters. */ - search_string = (char *)xmalloc (search_string_size = 128); - *search_string = '\0'; - search_string_index = 0; - prev_line_found = (char *)0; /* XXX */ - - /* Normalize DIRECTION into 1 or -1. */ - direction = (direction >= 0) ? 1 : -1; - - rl_display_search (search_string, reverse, -1); - - sline = rl_line_buffer; - sline_len = strlen (sline); - line_index = rl_point; - - found = failed = 0; - for (;;) - { - rl_command_func_t *f = (rl_command_func_t *)NULL; - - /* Read a key and decide how to proceed. */ - RL_SETSTATE(RL_STATE_MOREINPUT); - c = rl_read_key (); - RL_UNSETSTATE(RL_STATE_MOREINPUT); - -#if defined (HANDLE_MULTIBYTE) - if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) - c = _rl_read_mbstring (c, mb, MB_LEN_MAX); -#endif - - /* Translate the keys we do something with to opcodes. */ - if (c >= 0 && _rl_keymap[c].type == ISFUNC) - { - f = _rl_keymap[c].function; - - if (f == rl_reverse_search_history) - c = reverse ? -1 : -2; - else if (f == rl_forward_search_history) - c = !reverse ? -1 : -2; - else if (f == rl_rubout) - c = -3; - else if (c == CTRL ('G')) - c = -4; - else if (c == CTRL ('W')) /* XXX */ - c = -5; - else if (c == CTRL ('Y')) /* XXX */ - c = -6; - } - - /* The characters in isearch_terminators (set from the user-settable - variable isearch-terminators) are used to terminate the search but - not subsequently execute the character as a command. The default - value is "\033\012" (ESC and C-J). */ - if (strchr (isearch_terminators, c)) - { - /* ESC still terminates the search, but if there is pending - input or if input arrives within 0.1 seconds (on systems - with select(2)) it is used as a prefix character - with rl_execute_next. WATCH OUT FOR THIS! This is intended - to allow the arrow keys to be used like ^F and ^B are used - to terminate the search and execute the movement command. - XXX - since _rl_input_available depends on the application- - settable keyboard timeout value, this could alternatively - use _rl_input_queued(100000) */ - if (c == ESC && _rl_input_available ()) - rl_execute_next (ESC); - break; - } - -#define ENDSRCH_CHAR(c) \ - ((CTRL_CHAR (c) || META_CHAR (c) || (c) == RUBOUT) && ((c) != CTRL ('G'))) - -#if defined (HANDLE_MULTIBYTE) - if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) - { - if (c >= 0 && strlen (mb) == 1 && ENDSRCH_CHAR (c)) - { - /* This sets rl_pending_input to c; it will be picked up the next - time rl_read_key is called. */ - rl_execute_next (c); - break; - } - } - else -#endif - if (c >= 0 && ENDSRCH_CHAR (c)) - { - /* This sets rl_pending_input to c; it will be picked up the next - time rl_read_key is called. */ - rl_execute_next (c); - break; - } - - switch (c) - { - case -1: - if (search_string_index == 0) - { - if (last_isearch_string) - { - search_string_size = 64 + last_isearch_string_len; - search_string = (char *)xrealloc (search_string, search_string_size); - strcpy (search_string, last_isearch_string); - search_string_index = last_isearch_string_len; - rl_display_search (search_string, reverse, -1); - break; - } - continue; - } - else if (reverse) - --line_index; - else if (line_index != sline_len) - ++line_index; - else - rl_ding (); - break; - - /* switch directions */ - case -2: - direction = -direction; - reverse = direction < 0; - break; - - /* delete character from search string. */ - case -3: /* C-H, DEL */ - /* This is tricky. To do this right, we need to keep a - stack of search positions for the current search, with - sentinels marking the beginning and end. But this will - do until we have a real isearch-undo. */ - if (search_string_index == 0) - rl_ding (); - else - search_string[--search_string_index] = '\0'; - - break; - - case -4: /* C-G */ - rl_replace_line (lines[orig_line], 0); - rl_point = orig_point; - rl_mark = orig_mark; - rl_restore_prompt(); - rl_clear_message (); - if (allocated_line) - free (allocated_line); - free (lines); - RL_UNSETSTATE(RL_STATE_ISEARCH); - return 0; - - case -5: /* C-W */ - /* skip over portion of line we already matched */ - wstart = rl_point + search_string_index; - if (wstart >= rl_end) - { - rl_ding (); - break; - } - - /* if not in a word, move to one. */ - if (rl_alphabetic(rl_line_buffer[wstart]) == 0) - { - rl_ding (); - break; - } - n = wstart; - while (n < rl_end && rl_alphabetic(rl_line_buffer[n])) - n++; - wlen = n - wstart + 1; - if (search_string_index + wlen + 1 >= search_string_size) - { - search_string_size += wlen + 1; - search_string = (char *)xrealloc (search_string, search_string_size); - } - for (; wstart < n; wstart++) - search_string[search_string_index++] = rl_line_buffer[wstart]; - search_string[search_string_index] = '\0'; - break; - - case -6: /* C-Y */ - /* skip over portion of line we already matched */ - wstart = rl_point + search_string_index; - if (wstart >= rl_end) - { - rl_ding (); - break; - } - n = rl_end - wstart + 1; - if (search_string_index + n + 1 >= search_string_size) - { - search_string_size += n + 1; - search_string = (char *)xrealloc (search_string, search_string_size); - } - for (n = wstart; n < rl_end; n++) - search_string[search_string_index++] = rl_line_buffer[n]; - search_string[search_string_index] = '\0'; - break; - - default: - /* Add character to search string and continue search. */ - if (search_string_index + 2 >= search_string_size) - { - search_string_size += 128; - search_string = (char *)xrealloc (search_string, search_string_size); - } -#if defined (HANDLE_MULTIBYTE) - if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) - { - int j, l; - for (j = 0, l = strlen (mb); j < l; ) - search_string[search_string_index++] = mb[j++]; - } - else -#endif - search_string[search_string_index++] = c; - search_string[search_string_index] = '\0'; - break; - } - - for (found = failed = 0;;) - { - int limit = sline_len - search_string_index + 1; - - /* Search the current line. */ - while (reverse ? (line_index >= 0) : (line_index < limit)) - { - if (STREQN (search_string, sline + line_index, search_string_index)) - { - found++; - break; - } - else - line_index += direction; - } - if (found) - break; - - /* Move to the next line, but skip new copies of the line - we just found and lines shorter than the string we're - searching for. */ - do - { - /* Move to the next line. */ - i += direction; - - /* At limit for direction? */ - if (reverse ? (i < 0) : (i == hlen)) - { - failed++; - break; - } - - /* We will need these later. */ - sline = lines[i]; - sline_len = strlen (sline); - } - while ((prev_line_found && STREQ (prev_line_found, lines[i])) || - (search_string_index > sline_len)); - - if (failed) - break; - - /* Now set up the line for searching... */ - line_index = reverse ? sline_len - search_string_index : 0; - } - - if (failed) - { - /* We cannot find the search string. Ding the bell. */ - rl_ding (); - i = last_found_line; - continue; /* XXX - was break */ - } - - /* We have found the search string. Just display it. But don't - actually move there in the history list until the user accepts - the location. */ - if (found) - { - prev_line_found = lines[i]; - rl_replace_line (lines[i], 0); - rl_point = line_index; - last_found_line = i; - rl_display_search (search_string, reverse, (i == orig_line) ? -1 : i); - } - } - - /* The searching is over. The user may have found the string that she - was looking for, or else she may have exited a failing search. If - LINE_INDEX is -1, then that shows that the string searched for was - not found. We use this to determine where to place rl_point. */ - - /* First put back the original state. */ - strcpy (rl_line_buffer, lines[orig_line]); - - rl_restore_prompt (); - - /* Save the search string for possible later use. */ - FREE (last_isearch_string); - last_isearch_string = search_string; - last_isearch_string_len = search_string_index; - - if (last_found_line < orig_line) - rl_get_previous_history (orig_line - last_found_line, 0); - else - rl_get_next_history (last_found_line - orig_line, 0); - - /* If the string was not found, put point at the end of the last matching - line. If last_found_line == orig_line, we didn't find any matching - history lines at all, so put point back in its original position. */ - if (line_index < 0) - { - if (last_found_line == orig_line) - line_index = orig_point; - else - line_index = strlen (rl_line_buffer); - rl_mark = orig_mark; - } - - rl_point = line_index; - /* Don't worry about where to put the mark here; rl_get_previous_history - and rl_get_next_history take care of it. */ - - rl_clear_message (); - - FREE (allocated_line); - free (lines); - - RL_UNSETSTATE(RL_STATE_ISEARCH); - - return 0; -} |