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Diffstat (limited to 'MSVC/readline/search.c')
| -rw-r--r-- | MSVC/readline/search.c | 463 |
1 files changed, 463 insertions, 0 deletions
diff --git a/MSVC/readline/search.c b/MSVC/readline/search.c new file mode 100644 index 0000000..2f7d4b9 --- /dev/null +++ b/MSVC/readline/search.c @@ -0,0 +1,463 @@ +/* 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 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 + +#include "config.h" + +#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)) + +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 void noninc_dosearch PARAMS((char *, int)); +static void noninc_search PARAMS((int, int)); +static int rl_history_search_internal PARAMS((int, int)); +static void rl_history_search_reinit PARAMS((void)); + +/* 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_line (entry->line, 0); + rl_undo_list = (UNDO_LIST *)entry->data; + + 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. */ +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) + { + rl_ding (); + return; + } + + 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; + } + + 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 (); +} + +/* 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, saved_mark, c; + char *p; +#if defined (HANDLE_MULTIBYTE) + char mb[MB_LEN_MAX]; +#endif + + rl_maybe_save_line (); + saved_point = rl_point; + saved_mark = rl_mark; + + /* 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 (p, 0, 0); + free (p); + +#define SEARCH_RETURN rl_restore_prompt (); RL_UNSETSTATE(RL_STATE_NSEARCH); return + + RL_SETSTATE(RL_STATE_NSEARCH); + /* Read the search string. */ + while (1) + { + 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 + + if (c == 0) + break; + + switch (c) + { + case CTRL('H'): + case RUBOUT: + if (rl_point == 0) + { + rl_maybe_unsave_line (); + rl_clear_message (); + rl_point = saved_point; + rl_mark = saved_mark; + SEARCH_RETURN; + } + _rl_rubout_char (1, c); + break; + + case CTRL('W'): + rl_unix_word_rubout (1, c); + break; + + case CTRL('U'): + rl_unix_line_discard (1, c); + break; + + case RETURN: + case NEWLINE: + goto dosearch; + /* NOTREACHED */ + break; + + case CTRL('C'): + case CTRL('G'): + rl_maybe_unsave_line (); + rl_clear_message (); + rl_point = saved_point; + rl_mark = saved_mark; + rl_ding (); + SEARCH_RETURN; + + default: +#if defined (HANDLE_MULTIBYTE) + if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) + rl_insert_text (mb); + else +#endif + _rl_insert_char (1, c); + break; + } + (*rl_redisplay_function) (); + } + + dosearch: + rl_mark = saved_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) + { + rl_ding (); + SEARCH_RETURN; + } + } + else + { + /* We want to start the search from the current history position. */ + noninc_history_pos = where_history (); + FREE (noninc_search_string); + noninc_search_string = savestring (rl_line_buffer); + } + + rl_restore_prompt (); + noninc_dosearch (noninc_search_string, dir); + RL_UNSETSTATE(RL_STATE_NSEARCH); +} + +/* 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; +{ + noninc_search (1, (key == '?') ? '?' : 0); + return 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; +{ + noninc_search (-1, (key == '/') ? '/' : 0); + return 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; +{ + if (!noninc_search_string) + { + rl_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. */ +int +rl_noninc_reverse_search_again (count, key) + int count, key; +{ + if (!noninc_search_string) + { + rl_ding (); + return (-1); + } + noninc_dosearch (noninc_search_string, -1); + return 0; +} + +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)); +} |