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-rw-r--r--lib/readline/isearch.c893
1 files changed, 893 insertions, 0 deletions
diff --git a/lib/readline/isearch.c b/lib/readline/isearch.c
new file mode 100644
index 0000000..c2d4d23
--- /dev/null
+++ b/lib/readline/isearch.c
@@ -0,0 +1,893 @@
+/* isearch.c - incremental searching */
+
+/* **************************************************************** */
+/* */
+/* I-Search and Searching */
+/* */
+/* **************************************************************** */
+
+/* Copyright (C) 1987-2021 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"
+
+/* Variables exported to other files in the readline library. */
+char *_rl_isearch_terminators = (char *)NULL;
+
+_rl_search_cxt *_rl_iscxt = 0;
+
+static int rl_search_history (int, int);
+
+static _rl_search_cxt *_rl_isearch_init (int);
+static void _rl_isearch_fini (_rl_search_cxt *);
+
+/* Last line found by the current incremental search, so we don't `find'
+ identical lines many times in a row. Now part of isearch context. */
+/* static char *prev_line_found; */
+
+/* Last search string and its length. */
+static char *last_isearch_string;
+static int last_isearch_string_len;
+
+static char * const default_isearch_terminators = "\033\012";
+
+_rl_search_cxt *
+_rl_scxt_alloc (int type, int flags)
+{
+ _rl_search_cxt *cxt;
+
+ cxt = (_rl_search_cxt *)xmalloc (sizeof (_rl_search_cxt));
+
+ cxt->type = type;
+ cxt->sflags = flags;
+
+ cxt->search_string = 0;
+ cxt->search_string_size = cxt->search_string_index = 0;
+
+ cxt->lines = 0;
+ cxt->allocated_line = 0;
+ cxt->hlen = cxt->hindex = 0;
+
+ cxt->save_point = rl_point;
+ cxt->save_mark = rl_mark;
+ cxt->save_line = where_history ();
+ cxt->last_found_line = cxt->save_line;
+ cxt->prev_line_found = 0;
+
+ cxt->save_undo_list = 0;
+
+ cxt->keymap = _rl_keymap;
+ cxt->okeymap = _rl_keymap;
+
+ cxt->history_pos = 0;
+ cxt->direction = 0;
+
+ cxt->prevc = cxt->lastc = 0;
+
+ cxt->sline = 0;
+ cxt->sline_len = cxt->sline_index = 0;
+
+ cxt->search_terminators = 0;
+
+ return cxt;
+}
+
+void
+_rl_scxt_dispose (_rl_search_cxt *cxt, int flags)
+{
+ FREE (cxt->search_string);
+ FREE (cxt->allocated_line);
+ FREE (cxt->lines);
+
+ xfree (cxt);
+}
+
+/* Search backwards through the history looking for a string which is typed
+ interactively. Start with the current line. */
+int
+rl_reverse_search_history (int sign, int 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 (int sign, int 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 non-zero 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 (char *search_string, int flags, int where)
+{
+ char *message;
+ int msglen, searchlen;
+
+ searchlen = (search_string && *search_string) ? strlen (search_string) : 0;
+
+ message = (char *)xmalloc (searchlen + 64);
+ msglen = 0;
+
+#if defined (NOTDEF)
+ if (where != -1)
+ {
+ sprintf (message, "[%d]", where + history_base);
+ msglen = strlen (message);
+ }
+#endif /* NOTDEF */
+
+ message[msglen++] = '(';
+
+ if (flags & SF_FAILED)
+ {
+ strcpy (message + msglen, "failed ");
+ msglen += 7;
+ }
+
+ if (flags & SF_REVERSE)
+ {
+ strcpy (message + msglen, "reverse-");
+ msglen += 8;
+ }
+
+ strcpy (message + msglen, "i-search)`");
+ msglen += 10;
+
+ if (search_string && *search_string)
+ {
+ strcpy (message + msglen, search_string);
+ msglen += searchlen;
+ }
+ else
+ _rl_optimize_redisplay ();
+
+ strcpy (message + msglen, "': ");
+
+ rl_message ("%s", message);
+ xfree (message);
+#if 0
+ /* rl_message calls this */
+ (*rl_redisplay_function) ();
+#endif
+}
+
+static _rl_search_cxt *
+_rl_isearch_init (int direction)
+{
+ _rl_search_cxt *cxt;
+ register int i;
+ HIST_ENTRY **hlist;
+
+ cxt = _rl_scxt_alloc (RL_SEARCH_ISEARCH, 0);
+ if (direction < 0)
+ cxt->sflags |= SF_REVERSE;
+
+ cxt->search_terminators = _rl_isearch_terminators ? _rl_isearch_terminators
+ : default_isearch_terminators;
+
+ /* Create an array of pointers to the lines that we want to search. */
+ hlist = history_list ();
+ 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. */
+ cxt->lines = (char **)xmalloc ((1 + (cxt->hlen = i)) * sizeof (char *));
+ for (i = 0; i < cxt->hlen; i++)
+ cxt->lines[i] = hlist[i]->line;
+
+ if (_rl_saved_line_for_history)
+ cxt->lines[i] = _rl_saved_line_for_history->line;
+ else
+ {
+ /* Keep track of this so we can free it. */
+ cxt->allocated_line = (char *)xmalloc (1 + strlen (rl_line_buffer));
+ strcpy (cxt->allocated_line, &rl_line_buffer[0]);
+ cxt->lines[i] = cxt->allocated_line;
+ }
+
+ cxt->hlen++;
+
+ /* The line where we start the search. */
+ cxt->history_pos = cxt->save_line;
+
+ rl_save_prompt ();
+
+ /* Initialize search parameters. */
+ cxt->search_string = (char *)xmalloc (cxt->search_string_size = 128);
+ cxt->search_string[cxt->search_string_index = 0] = '\0';
+
+ /* Normalize DIRECTION into 1 or -1. */
+ cxt->direction = (direction >= 0) ? 1 : -1;
+
+ cxt->sline = rl_line_buffer;
+ cxt->sline_len = strlen (cxt->sline);
+ cxt->sline_index = rl_point;
+
+ _rl_iscxt = cxt; /* save globally */
+
+ /* experimental right now */
+ _rl_init_executing_keyseq ();
+
+ return cxt;
+}
+
+static void
+_rl_isearch_fini (_rl_search_cxt *cxt)
+{
+ /* First put back the original state. */
+ rl_replace_line (cxt->lines[cxt->save_line], 0);
+
+ rl_restore_prompt ();
+
+ /* Save the search string for possible later use. */
+ FREE (last_isearch_string);
+ last_isearch_string = cxt->search_string;
+ last_isearch_string_len = cxt->search_string_index;
+ cxt->search_string = 0;
+ cxt->search_string_size = 0;
+ cxt->search_string_index = 0;
+
+ if (cxt->last_found_line < cxt->save_line)
+ rl_get_previous_history (cxt->save_line - cxt->last_found_line, 0);
+ else
+ rl_get_next_history (cxt->last_found_line - cxt->save_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 (cxt->sline_index < 0)
+ {
+ if (cxt->last_found_line == cxt->save_line)
+ cxt->sline_index = cxt->save_point;
+ else
+ cxt->sline_index = strlen (rl_line_buffer);
+ rl_mark = cxt->save_mark;
+ rl_deactivate_mark ();
+ }
+
+ rl_point = cxt->sline_index;
+ /* Don't worry about where to put the mark here; rl_get_previous_history
+ and rl_get_next_history take care of it.
+ If we want to highlight the search string, this is where to set the
+ point and mark to do it. */
+ _rl_fix_point (0);
+ rl_deactivate_mark ();
+
+/* _rl_optimize_redisplay (); */
+ rl_clear_message ();
+}
+
+/* XXX - we could use _rl_bracketed_read_mbstring () here. */
+int
+_rl_search_getchar (_rl_search_cxt *cxt)
+{
+ int c;
+
+ /* Read a key and decide how to proceed. */
+ RL_SETSTATE(RL_STATE_MOREINPUT);
+ c = cxt->lastc = rl_read_key ();
+ RL_UNSETSTATE(RL_STATE_MOREINPUT);
+
+#if defined (HANDLE_MULTIBYTE)
+ /* This ends up with C (and LASTC) being set to the last byte of the
+ multibyte character. In most cases c == lastc == mb[0] */
+ if (c >= 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ c = cxt->lastc = _rl_read_mbstring (cxt->lastc, cxt->mb, MB_LEN_MAX);
+#endif
+
+ RL_CHECK_SIGNALS ();
+ return c;
+}
+
+#define ENDSRCH_CHAR(c) \
+ ((CTRL_CHAR (c) || META_CHAR (c) || (c) == RUBOUT) && ((c) != CTRL ('G')))
+
+/* Process just-read character C according to isearch context CXT. Return
+ -1 if the caller should just free the context and return, 0 if we should
+ break out of the loop, and 1 if we should continue to read characters. */
+int
+_rl_isearch_dispatch (_rl_search_cxt *cxt, int c)
+{
+ int n, wstart, wlen, limit, cval, incr;
+ char *paste;
+ size_t pastelen;
+ int j;
+ rl_command_func_t *f;
+
+ f = (rl_command_func_t *)NULL;
+
+ if (c < 0)
+ {
+ cxt->sflags |= SF_FAILED;
+ cxt->history_pos = cxt->last_found_line;
+ return -1;
+ }
+
+ _rl_add_executing_keyseq (c);
+
+ /* XXX - experimental code to allow users to bracketed-paste into the search
+ string even when ESC is one of the isearch-terminators. Not perfect yet. */
+ if (_rl_enable_bracketed_paste && c == ESC && strchr (cxt->search_terminators, c) && (n = _rl_nchars_available ()) > (BRACK_PASTE_SLEN-1))
+ {
+ j = _rl_read_bracketed_paste_prefix (c);
+ if (j == 1)
+ {
+ cxt->lastc = -7; /* bracketed paste, see below */
+ goto opcode_dispatch;
+ }
+ else if (_rl_pushed_input_available ()) /* eat extra char we pushed back */
+ c = cxt->lastc = rl_read_key ();
+ else
+ c = cxt->lastc; /* last ditch */
+ }
+
+ /* If we are moving into a new keymap, modify cxt->keymap and go on.
+ This can be a problem if c == ESC and we want to terminate the
+ incremental search, so we check */
+ if (c >= 0 && cxt->keymap[c].type == ISKMAP && strchr (cxt->search_terminators, cxt->lastc) == 0)
+ {
+ /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
+ takes microseconds, so multiply by 1000. If we don't get any
+ additional input and this keymap shadows another function, process
+ that key as if it was all we read. */
+ if (_rl_keyseq_timeout > 0 &&
+ RL_ISSTATE (RL_STATE_CALLBACK) == 0 &&
+ RL_ISSTATE (RL_STATE_INPUTPENDING) == 0 &&
+ _rl_pushed_input_available () == 0 &&
+ ((Keymap)(cxt->keymap[c].function))[ANYOTHERKEY].function &&
+ _rl_input_queued (_rl_keyseq_timeout*1000) == 0)
+ goto add_character;
+
+ cxt->okeymap = cxt->keymap;
+ cxt->keymap = FUNCTION_TO_KEYMAP (cxt->keymap, c);
+ cxt->sflags |= SF_CHGKMAP;
+ /* XXX - we should probably save this sequence, so we can do
+ something useful if this doesn't end up mapping to a command we
+ interpret here. Right now we just save the most recent character
+ that caused the index into a new keymap. */
+ cxt->prevc = c;
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ if (cxt->mb[1] == 0)
+ {
+ cxt->pmb[0] = c; /* XXX should be == cxt->mb[0] */
+ cxt->pmb[1] = '\0';
+ }
+ else
+ memcpy (cxt->pmb, cxt->mb, sizeof (cxt->pmb));
+ }
+#endif
+ return 1;
+ }
+
+add_character:
+
+ /* Translate the keys we do something with to opcodes. */
+ if (c >= 0 && cxt->keymap[c].type == ISFUNC)
+ {
+ /* If we have a multibyte character, see if it's bound to something that
+ affects the search. */
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && cxt->mb[1])
+ f = rl_function_of_keyseq (cxt->mb, cxt->keymap, (int *)NULL);
+ else
+#endif
+ {
+ f = cxt->keymap[c].function;
+ if (f == rl_do_lowercase_version)
+ f = cxt->keymap[_rl_to_lower (c)].function;
+ }
+
+ if (f == rl_reverse_search_history)
+ cxt->lastc = (cxt->sflags & SF_REVERSE) ? -1 : -2;
+ else if (f == rl_forward_search_history)
+ cxt->lastc = (cxt->sflags & SF_REVERSE) ? -2 : -1;
+ else if (f == rl_rubout)
+ cxt->lastc = -3;
+ else if (c == CTRL ('G') || f == rl_abort)
+ cxt->lastc = -4;
+ else if (c == CTRL ('W') || f == rl_unix_word_rubout) /* XXX */
+ cxt->lastc = -5;
+ else if (c == CTRL ('Y') || f == rl_yank) /* XXX */
+ cxt->lastc = -6;
+ else if (f == rl_bracketed_paste_begin)
+ cxt->lastc = -7;
+ }
+
+ /* If we changed the keymap earlier while translating a key sequence into
+ a command, restore it now that we've succeeded. */
+ if (cxt->sflags & SF_CHGKMAP)
+ {
+ cxt->keymap = cxt->okeymap;
+ cxt->sflags &= ~SF_CHGKMAP;
+ /* If we indexed into a new keymap, but didn't map to a command that
+ affects the search (lastc > 0), and the character that mapped to a
+ new keymap would have ended the search (ENDSRCH_CHAR(cxt->prevc)),
+ handle that now as if the previous char would have ended the search
+ and we would have read the current character. */
+ /* XXX - should we check cxt->mb? */
+ if (cxt->lastc > 0 && ENDSRCH_CHAR (cxt->prevc))
+ {
+ rl_stuff_char (cxt->lastc);
+ rl_execute_next (cxt->prevc);
+ /* XXX - do we insert everything in cxt->pmb? */
+ return (0);
+ }
+ /* Otherwise, if the current character is mapped to self-insert or
+ nothing (i.e., not an editing command), and the previous character
+ was a keymap index, then we need to insert both the previous
+ character and the current character into the search string. */
+ else if (cxt->lastc > 0 && cxt->prevc > 0 &&
+ cxt->keymap[cxt->prevc].type == ISKMAP &&
+ (f == 0 || f == rl_insert))
+ {
+ /* Make lastc be the next character read */
+ /* XXX - do we insert everything in cxt->mb? */
+ rl_execute_next (cxt->lastc);
+ /* Dispatch on the previous character (insert into search string) */
+ cxt->lastc = cxt->prevc;
+#if defined (HANDLE_MULTIBYTE)
+ /* Have to overwrite cxt->mb here because dispatch uses it below */
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ if (cxt->pmb[1] == 0)
+ {
+ cxt->mb[0] = cxt->lastc; /* == cxt->prevc */
+ cxt->mb[1] = '\0';
+ }
+ else
+ memcpy (cxt->mb, cxt->pmb, sizeof (cxt->mb));
+ }
+#endif
+ cxt->prevc = 0;
+ }
+ else if (cxt->lastc > 0 && cxt->prevc > 0 && f && f != rl_insert)
+ {
+ _rl_term_executing_keyseq (); /* should this go in the caller? */
+
+ _rl_pending_command.map = cxt->keymap;
+ _rl_pending_command.count = 1; /* XXX */
+ _rl_pending_command.key = cxt->lastc;
+ _rl_pending_command.func = f;
+ _rl_command_to_execute = &_rl_pending_command;
+
+ return (0);
+ }
+ }
+
+ /* 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 (cxt->lastc > 0 && strchr (cxt->search_terminators, cxt->lastc))
+ {
+ /* 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 (cxt->lastc == ESC && (_rl_pushed_input_available () || _rl_input_available ()))
+ rl_execute_next (ESC);
+ return (0);
+ }
+
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ if (cxt->lastc >= 0 && (cxt->mb[0] && cxt->mb[1] == '\0') && ENDSRCH_CHAR (cxt->lastc))
+ {
+ /* This sets rl_pending_input to LASTC; it will be picked up the next
+ time rl_read_key is called. */
+ rl_execute_next (cxt->lastc);
+ return (0);
+ }
+ }
+ else
+#endif
+ if (cxt->lastc >= 0 && ENDSRCH_CHAR (cxt->lastc))
+ {
+ /* This sets rl_pending_input to LASTC; it will be picked up the next
+ time rl_read_key is called. */
+ rl_execute_next (cxt->lastc);
+ return (0);
+ }
+
+ _rl_init_executing_keyseq ();
+
+opcode_dispatch:
+ /* Now dispatch on the character. `Opcodes' affect the search string or
+ state. Other characters are added to the string. */
+ switch (cxt->lastc)
+ {
+ /* search again */
+ case -1:
+ if (cxt->search_string_index == 0)
+ {
+ if (last_isearch_string)
+ {
+ cxt->search_string_size = 64 + last_isearch_string_len;
+ cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
+ strcpy (cxt->search_string, last_isearch_string);
+ cxt->search_string_index = last_isearch_string_len;
+ rl_display_search (cxt->search_string, cxt->sflags, -1);
+ break;
+ }
+ /* XXX - restore keymap here? */
+ return (1);
+ }
+ else if ((cxt->sflags & SF_REVERSE) && cxt->sline_index >= 0)
+ cxt->sline_index--;
+ else if (cxt->sline_index != cxt->sline_len)
+ cxt->sline_index++;
+ else
+ rl_ding ();
+ break;
+
+ /* switch directions */
+ case -2:
+ cxt->direction = -cxt->direction;
+ if (cxt->direction < 0)
+ cxt->sflags |= SF_REVERSE;
+ else
+ cxt->sflags &= ~SF_REVERSE;
+ 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 (cxt->search_string_index == 0)
+ rl_ding ();
+ else if (MB_CUR_MAX == 1 || rl_byte_oriented)
+ cxt->search_string[--cxt->search_string_index] = '\0';
+ else
+ {
+ wstart = _rl_find_prev_mbchar (cxt->search_string, cxt->search_string_index, MB_FIND_NONZERO);
+ if (wstart >= 0)
+ cxt->search_string[cxt->search_string_index = wstart] = '\0';
+ else
+ cxt->search_string[cxt->search_string_index = 0] = '\0';
+ }
+
+ if (cxt->search_string_index == 0)
+ rl_ding ();
+
+ break;
+
+ case -4: /* C-G, abort */
+ rl_replace_line (cxt->lines[cxt->save_line], 0);
+ rl_point = cxt->save_point;
+ rl_mark = cxt->save_mark;
+ rl_deactivate_mark ();
+ rl_restore_prompt();
+ rl_clear_message ();
+
+ _rl_fix_point (1); /* in case save_line and save_point are out of sync */
+ return -1;
+
+ case -5: /* C-W */
+ /* skip over portion of line we already matched and yank word */
+ wstart = rl_point + cxt->search_string_index;
+ if (wstart >= rl_end)
+ {
+ rl_ding ();
+ break;
+ }
+
+ /* if not in a word, move to one. */
+ cval = _rl_char_value (rl_line_buffer, wstart);
+ if (_rl_walphabetic (cval) == 0)
+ {
+ rl_ding ();
+ break;
+ }
+ n = MB_NEXTCHAR (rl_line_buffer, wstart, 1, MB_FIND_NONZERO);;
+ while (n < rl_end)
+ {
+ cval = _rl_char_value (rl_line_buffer, n);
+ if (_rl_walphabetic (cval) == 0)
+ break;
+ n = MB_NEXTCHAR (rl_line_buffer, n, 1, MB_FIND_NONZERO);;
+ }
+ wlen = n - wstart + 1;
+ if (cxt->search_string_index + wlen + 1 >= cxt->search_string_size)
+ {
+ cxt->search_string_size += wlen + 1;
+ cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
+ }
+ for (; wstart < n; wstart++)
+ cxt->search_string[cxt->search_string_index++] = rl_line_buffer[wstart];
+ cxt->search_string[cxt->search_string_index] = '\0';
+ break;
+
+ case -6: /* C-Y */
+ /* skip over portion of line we already matched and yank rest */
+ wstart = rl_point + cxt->search_string_index;
+ if (wstart >= rl_end)
+ {
+ rl_ding ();
+ break;
+ }
+ n = rl_end - wstart + 1;
+ if (cxt->search_string_index + n + 1 >= cxt->search_string_size)
+ {
+ cxt->search_string_size += n + 1;
+ cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
+ }
+ for (n = wstart; n < rl_end; n++)
+ cxt->search_string[cxt->search_string_index++] = rl_line_buffer[n];
+ cxt->search_string[cxt->search_string_index] = '\0';
+ break;
+
+ case -7: /* bracketed paste */
+ paste = _rl_bracketed_text (&pastelen);
+ if (paste == 0 || *paste == 0)
+ {
+ xfree (paste);
+ break;
+ }
+ if (_rl_enable_active_region)
+ rl_activate_mark ();
+ if (cxt->search_string_index + pastelen + 1 >= cxt->search_string_size)
+ {
+ cxt->search_string_size += pastelen + 2;
+ cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
+ }
+ memcpy (cxt->search_string + cxt->search_string_index, paste, pastelen);
+ cxt->search_string_index += pastelen;
+ cxt->search_string[cxt->search_string_index] = '\0';
+ xfree (paste);
+ break;
+
+ /* Add character to search string and continue search. */
+ default:
+#if defined (HANDLE_MULTIBYTE)
+ wlen = (cxt->mb[0] == 0 || cxt->mb[1] == 0) ? 1 : RL_STRLEN (cxt->mb);
+#else
+ wlen = 1;
+#endif
+ if (cxt->search_string_index + wlen + 1 >= cxt->search_string_size)
+ {
+ cxt->search_string_size += 128; /* 128 much greater than MB_CUR_MAX */
+ cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
+ }
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ int j;
+
+ if (cxt->mb[0] == 0 || cxt->mb[1] == 0)
+ cxt->search_string[cxt->search_string_index++] = cxt->mb[0];
+ else
+ for (j = 0; j < wlen; )
+ cxt->search_string[cxt->search_string_index++] = cxt->mb[j++];
+ }
+ else
+#endif
+ cxt->search_string[cxt->search_string_index++] = cxt->lastc; /* XXX - was c instead of lastc */
+ cxt->search_string[cxt->search_string_index] = '\0';
+ break;
+ }
+
+ for (cxt->sflags &= ~(SF_FOUND|SF_FAILED);; )
+ {
+ if (cxt->search_string_index == 0)
+ {
+ cxt->sflags |= SF_FAILED;
+ break;
+ }
+
+ limit = cxt->sline_len - cxt->search_string_index + 1;
+
+ /* Search the current line. */
+ while ((cxt->sflags & SF_REVERSE) ? (cxt->sline_index >= 0) : (cxt->sline_index < limit))
+ {
+ if (STREQN (cxt->search_string, cxt->sline + cxt->sline_index, cxt->search_string_index))
+ {
+ cxt->sflags |= SF_FOUND;
+ break;
+ }
+ else
+ cxt->sline_index += cxt->direction;
+
+ if (cxt->sline_index < 0)
+ {
+ cxt->sline_index = 0;
+ break;
+ }
+ }
+ if (cxt->sflags & SF_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. */
+ cxt->history_pos += cxt->direction;
+
+ /* At limit for direction? */
+ if ((cxt->sflags & SF_REVERSE) ? (cxt->history_pos < 0) : (cxt->history_pos == cxt->hlen))
+ {
+ cxt->sflags |= SF_FAILED;
+ break;
+ }
+
+ /* We will need these later. */
+ cxt->sline = cxt->lines[cxt->history_pos];
+ cxt->sline_len = strlen (cxt->sline);
+ }
+ while ((cxt->prev_line_found && STREQ (cxt->prev_line_found, cxt->lines[cxt->history_pos])) ||
+ (cxt->search_string_index > cxt->sline_len));
+
+ if (cxt->sflags & SF_FAILED)
+ {
+ /* XXX - reset sline_index if < 0 */
+ if (cxt->sline_index < 0)
+ cxt->sline_index = 0;
+ break;
+ }
+
+ /* Now set up the line for searching... */
+ cxt->sline_index = (cxt->sflags & SF_REVERSE) ? cxt->sline_len - cxt->search_string_index : 0;
+ }
+
+ /* reset the keymaps for the next time through the loop */
+ cxt->keymap = cxt->okeymap = _rl_keymap;
+
+ if (cxt->sflags & SF_FAILED)
+ {
+ /* We cannot find the search string. Ding the bell. */
+ rl_ding ();
+ cxt->history_pos = cxt->last_found_line;
+ rl_deactivate_mark ();
+ rl_display_search (cxt->search_string, cxt->sflags, (cxt->history_pos == cxt->save_line) ? -1 : cxt->history_pos);
+ return 1;
+ }
+
+ /* 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 (cxt->sflags & SF_FOUND)
+ {
+ cxt->prev_line_found = cxt->lines[cxt->history_pos];
+ rl_replace_line (cxt->lines[cxt->history_pos], 0);
+ if (_rl_enable_active_region)
+ rl_activate_mark ();
+ rl_point = cxt->sline_index;
+ if (rl_mark_active_p () && cxt->search_string_index > 0)
+ rl_mark = rl_point + cxt->search_string_index;
+ cxt->last_found_line = cxt->history_pos;
+ rl_display_search (cxt->search_string, cxt->sflags, (cxt->history_pos == cxt->save_line) ? -1 : cxt->history_pos);
+ }
+
+ return 1;
+}
+
+int
+_rl_isearch_cleanup (_rl_search_cxt *cxt, int r)
+{
+ if (r >= 0)
+ _rl_isearch_fini (cxt);
+ _rl_scxt_dispose (cxt, 0);
+ _rl_iscxt = 0;
+
+ RL_UNSETSTATE(RL_STATE_ISEARCH);
+
+ return (r != 0);
+}
+
+/* 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 (int direction, int invoking_key)
+{
+ _rl_search_cxt *cxt; /* local for now, but saved globally */
+ int c, r;
+
+ RL_SETSTATE(RL_STATE_ISEARCH);
+ cxt = _rl_isearch_init (direction);
+
+ rl_display_search (cxt->search_string, cxt->sflags, -1);
+
+ /* If we are using the callback interface, all we do is set up here and
+ return. The key is that we leave RL_STATE_ISEARCH set. */
+ if (RL_ISSTATE (RL_STATE_CALLBACK))
+ return (0);
+
+ r = -1;
+ for (;;)
+ {
+ c = _rl_search_getchar (cxt);
+ /* We might want to handle EOF here (c == 0) */
+ r = _rl_isearch_dispatch (cxt, cxt->lastc);
+ if (r <= 0)
+ break;
+ }
+
+ /* 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. */
+ return (_rl_isearch_cleanup (cxt, r));
+}
+
+#if defined (READLINE_CALLBACKS)
+/* Called from the callback functions when we are ready to read a key. The
+ callback functions know to call this because RL_ISSTATE(RL_STATE_ISEARCH).
+ If _rl_isearch_dispatch finishes searching, this function is responsible
+ for turning off RL_STATE_ISEARCH, which it does using _rl_isearch_cleanup. */
+int
+_rl_isearch_callback (_rl_search_cxt *cxt)
+{
+ int c, r;
+
+ c = _rl_search_getchar (cxt);
+ /* We might want to handle EOF here */
+ r = _rl_isearch_dispatch (cxt, cxt->lastc);
+
+ return (r <= 0) ? _rl_isearch_cleanup (cxt, r) : 0;
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 08:32:55 +0000