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-rw-r--r--lib/readline/kill.c866
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diff --git a/lib/readline/kill.c b/lib/readline/kill.c
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+++ b/lib/readline/kill.c
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+/* kill.c -- kill ring management. */
+
+/* Copyright (C) 1994-2020 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>
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h> /* for _POSIX_VERSION */
+#endif /* HAVE_UNISTD_H */
+
+#if defined (HAVE_STDLIB_H)
+# include <stdlib.h>
+#else
+# include "ansi_stdlib.h"
+#endif /* HAVE_STDLIB_H */
+
+#include <stdio.h>
+
+/* System-specific feature definitions and include files. */
+#include "rldefs.h"
+
+/* Some standard library routines. */
+#include "readline.h"
+#include "history.h"
+
+#include "rlprivate.h"
+#include "xmalloc.h"
+
+/* **************************************************************** */
+/* */
+/* Killing Mechanism */
+/* */
+/* **************************************************************** */
+
+/* What we assume for a max number of kills. */
+#define DEFAULT_MAX_KILLS 10
+
+/* The real variable to look at to find out when to flush kills. */
+static int rl_max_kills = DEFAULT_MAX_KILLS;
+
+/* Where to store killed text. */
+static char **rl_kill_ring = (char **)NULL;
+
+/* Where we are in the kill ring. */
+static int rl_kill_index;
+
+/* How many slots we have in the kill ring. */
+static int rl_kill_ring_length;
+
+static int _rl_copy_to_kill_ring PARAMS((char *, int));
+static int region_kill_internal PARAMS((int));
+static int _rl_copy_word_as_kill PARAMS((int, int));
+static int rl_yank_nth_arg_internal PARAMS((int, int, int));
+
+/* How to say that you only want to save a certain amount
+ of kill material. */
+int
+rl_set_retained_kills (int num)
+{
+ return 0;
+}
+
+/* Add TEXT to the kill ring, allocating a new kill ring slot as necessary.
+ This uses TEXT directly, so the caller must not free it. If APPEND is
+ non-zero, and the last command was a kill, the text is appended to the
+ current kill ring slot, otherwise prepended. */
+static int
+_rl_copy_to_kill_ring (char *text, int append)
+{
+ char *old, *new;
+ int slot;
+
+ /* First, find the slot to work with. */
+ if (_rl_last_command_was_kill == 0 || rl_kill_ring == 0)
+ {
+ /* Get a new slot. */
+ if (rl_kill_ring == 0)
+ {
+ /* If we don't have any defined, then make one. */
+ rl_kill_ring = (char **)
+ xmalloc (((rl_kill_ring_length = 1) + 1) * sizeof (char *));
+ rl_kill_ring[slot = 0] = (char *)NULL;
+ }
+ else
+ {
+ /* We have to add a new slot on the end, unless we have
+ exceeded the max limit for remembering kills. */
+ slot = rl_kill_ring_length;
+ if (slot == rl_max_kills)
+ {
+ register int i;
+ xfree (rl_kill_ring[0]);
+ for (i = 0; i < slot; i++)
+ rl_kill_ring[i] = rl_kill_ring[i + 1];
+ }
+ else
+ {
+ slot = rl_kill_ring_length += 1;
+ rl_kill_ring = (char **)xrealloc (rl_kill_ring, (slot + 1) * sizeof (char *));
+ }
+ rl_kill_ring[--slot] = (char *)NULL;
+ }
+ }
+ else
+ slot = rl_kill_ring_length - 1;
+
+ /* If the last command was a kill, prepend or append. */
+ if (_rl_last_command_was_kill && rl_kill_ring[slot] && rl_editing_mode != vi_mode)
+ {
+ old = rl_kill_ring[slot];
+ new = (char *)xmalloc (1 + strlen (old) + strlen (text));
+
+ if (append)
+ {
+ strcpy (new, old);
+ strcat (new, text);
+ }
+ else
+ {
+ strcpy (new, text);
+ strcat (new, old);
+ }
+ xfree (old);
+ xfree (text);
+ rl_kill_ring[slot] = new;
+ }
+ else
+ rl_kill_ring[slot] = text;
+
+ rl_kill_index = slot;
+ return 0;
+}
+
+/* The way to kill something. This appends or prepends to the last
+ kill, if the last command was a kill command. if FROM is less
+ than TO, then the text is appended, otherwise prepended. If the
+ last command was not a kill command, then a new slot is made for
+ this kill. */
+int
+rl_kill_text (int from, int to)
+{
+ char *text;
+
+ /* Is there anything to kill? */
+ if (from == to)
+ {
+ _rl_last_command_was_kill++;
+ return 0;
+ }
+
+ text = rl_copy_text (from, to);
+
+ /* Delete the copied text from the line. */
+ rl_delete_text (from, to);
+
+ _rl_copy_to_kill_ring (text, from < to);
+
+ _rl_last_command_was_kill++;
+ return 0;
+}
+
+/* Now REMEMBER! In order to do prepending or appending correctly, kill
+ commands always make rl_point's original position be the FROM argument,
+ and rl_point's extent be the TO argument. */
+
+/* **************************************************************** */
+/* */
+/* Killing Commands */
+/* */
+/* **************************************************************** */
+
+/* Delete the word at point, saving the text in the kill ring. */
+int
+rl_kill_word (int count, int key)
+{
+ int orig_point;
+
+ if (count < 0)
+ return (rl_backward_kill_word (-count, key));
+ else
+ {
+ orig_point = rl_point;
+ rl_forward_word (count, key);
+
+ if (rl_point != orig_point)
+ rl_kill_text (orig_point, rl_point);
+
+ rl_point = orig_point;
+ if (rl_editing_mode == emacs_mode)
+ rl_mark = rl_point;
+ }
+ return 0;
+}
+
+/* Rubout the word before point, placing it on the kill ring. */
+int
+rl_backward_kill_word (int count, int key)
+{
+ int orig_point;
+
+ if (count < 0)
+ return (rl_kill_word (-count, key));
+ else
+ {
+ orig_point = rl_point;
+ rl_backward_word (count, key);
+
+ if (rl_point != orig_point)
+ rl_kill_text (orig_point, rl_point);
+
+ if (rl_editing_mode == emacs_mode)
+ rl_mark = rl_point;
+ }
+ return 0;
+}
+
+/* Kill from here to the end of the line. If DIRECTION is negative, kill
+ back to the line start instead. */
+int
+rl_kill_line (int direction, int key)
+{
+ int orig_point;
+
+ if (direction < 0)
+ return (rl_backward_kill_line (1, key));
+ else
+ {
+ orig_point = rl_point;
+ rl_end_of_line (1, key);
+ if (orig_point != rl_point)
+ rl_kill_text (orig_point, rl_point);
+ rl_point = orig_point;
+ if (rl_editing_mode == emacs_mode)
+ rl_mark = rl_point;
+ }
+ return 0;
+}
+
+/* Kill backwards to the start of the line. If DIRECTION is negative, kill
+ forwards to the line end instead. */
+int
+rl_backward_kill_line (int direction, int key)
+{
+ int orig_point;
+
+ if (direction < 0)
+ return (rl_kill_line (1, key));
+ else
+ {
+ if (rl_point == 0)
+ rl_ding ();
+ else
+ {
+ orig_point = rl_point;
+ rl_beg_of_line (1, key);
+ if (rl_point != orig_point)
+ rl_kill_text (orig_point, rl_point);
+ if (rl_editing_mode == emacs_mode)
+ rl_mark = rl_point;
+ }
+ }
+ return 0;
+}
+
+/* Kill the whole line, no matter where point is. */
+int
+rl_kill_full_line (int count, int key)
+{
+ rl_begin_undo_group ();
+ rl_point = 0;
+ rl_kill_text (rl_point, rl_end);
+ rl_mark = 0;
+ rl_end_undo_group ();
+ return 0;
+}
+
+/* The next two functions mimic unix line editing behaviour, except they
+ save the deleted text on the kill ring. This is safer than not saving
+ it, and since we have a ring, nobody should get screwed. */
+
+/* This does what C-w does in Unix. We can't prevent people from
+ using behaviour that they expect. */
+int
+rl_unix_word_rubout (int count, int key)
+{
+ int orig_point;
+
+ if (rl_point == 0)
+ rl_ding ();
+ else
+ {
+ orig_point = rl_point;
+ if (count <= 0)
+ count = 1;
+
+ while (count--)
+ {
+ while (rl_point && whitespace (rl_line_buffer[rl_point - 1]))
+ rl_point--;
+
+ while (rl_point && (whitespace (rl_line_buffer[rl_point - 1]) == 0))
+ rl_point--; /* XXX - multibyte? */
+ }
+
+ rl_kill_text (orig_point, rl_point);
+ if (rl_editing_mode == emacs_mode)
+ rl_mark = rl_point;
+ }
+
+ return 0;
+}
+
+/* This deletes one filename component in a Unix pathname. That is, it
+ deletes backward to directory separator (`/') or whitespace. */
+int
+rl_unix_filename_rubout (int count, int key)
+{
+ int orig_point, c;
+
+ if (rl_point == 0)
+ rl_ding ();
+ else
+ {
+ orig_point = rl_point;
+ if (count <= 0)
+ count = 1;
+
+ while (count--)
+ {
+ c = rl_line_buffer[rl_point - 1];
+ while (rl_point && (whitespace (c) || c == '/'))
+ {
+ rl_point--;
+ c = rl_line_buffer[rl_point - 1];
+ }
+
+ while (rl_point && (whitespace (c) == 0) && c != '/')
+ {
+ rl_point--; /* XXX - multibyte? */
+ c = rl_line_buffer[rl_point - 1];
+ }
+ }
+
+ rl_kill_text (orig_point, rl_point);
+ if (rl_editing_mode == emacs_mode)
+ rl_mark = rl_point;
+ }
+
+ return 0;
+}
+
+/* Here is C-u doing what Unix does. You don't *have* to use these
+ key-bindings. We have a choice of killing the entire line, or
+ killing from where we are to the start of the line. We choose the
+ latter, because if you are a Unix weenie, then you haven't backspaced
+ into the line at all, and if you aren't, then you know what you are
+ doing. */
+int
+rl_unix_line_discard (int count, int key)
+{
+ if (rl_point == 0)
+ rl_ding ();
+ else
+ {
+ rl_kill_text (rl_point, 0);
+ rl_point = 0;
+ if (rl_editing_mode == emacs_mode)
+ rl_mark = rl_point;
+ }
+ return 0;
+}
+
+/* Copy the text in the `region' to the kill ring. If DELETE is non-zero,
+ delete the text from the line as well. */
+static int
+region_kill_internal (int delete)
+{
+ char *text;
+
+ if (rl_mark != rl_point)
+ {
+ text = rl_copy_text (rl_point, rl_mark);
+ if (delete)
+ rl_delete_text (rl_point, rl_mark);
+ _rl_copy_to_kill_ring (text, rl_point < rl_mark);
+ }
+
+ _rl_fix_point (1);
+ _rl_last_command_was_kill++;
+ return 0;
+}
+
+/* Copy the text in the region to the kill ring. */
+int
+rl_copy_region_to_kill (int count, int key)
+{
+ return (region_kill_internal (0));
+}
+
+/* Kill the text between the point and mark. */
+int
+rl_kill_region (int count, int key)
+{
+ int r, npoint;
+
+ npoint = (rl_point < rl_mark) ? rl_point : rl_mark;
+ r = region_kill_internal (1);
+ rl_point = npoint;
+ _rl_fix_point (1);
+ return r;
+}
+
+/* Copy COUNT words to the kill ring. DIR says which direction we look
+ to find the words. */
+static int
+_rl_copy_word_as_kill (int count, int dir)
+{
+ int om, op, r;
+
+ om = rl_mark;
+ op = rl_point;
+
+ if (dir > 0)
+ rl_forward_word (count, 0);
+ else
+ rl_backward_word (count, 0);
+
+ rl_mark = rl_point;
+
+ if (dir > 0)
+ rl_backward_word (count, 0);
+ else
+ rl_forward_word (count, 0);
+
+ r = region_kill_internal (0);
+
+ rl_mark = om;
+ rl_point = op;
+
+ return r;
+}
+
+int
+rl_copy_forward_word (int count, int key)
+{
+ if (count < 0)
+ return (rl_copy_backward_word (-count, key));
+
+ return (_rl_copy_word_as_kill (count, 1));
+}
+
+int
+rl_copy_backward_word (int count, int key)
+{
+ if (count < 0)
+ return (rl_copy_forward_word (-count, key));
+
+ return (_rl_copy_word_as_kill (count, -1));
+}
+
+/* Yank back the last killed text. This ignores arguments. */
+int
+rl_yank (int count, int key)
+{
+ if (rl_kill_ring == 0)
+ {
+ _rl_abort_internal ();
+ return 1;
+ }
+
+ _rl_set_mark_at_pos (rl_point);
+ rl_insert_text (rl_kill_ring[rl_kill_index]);
+ return 0;
+}
+
+/* If the last command was yank, or yank_pop, and the text just
+ before point is identical to the current kill item, then
+ delete that text from the line, rotate the index down, and
+ yank back some other text. */
+int
+rl_yank_pop (int count, int key)
+{
+ int l, n;
+
+ if (((rl_last_func != rl_yank_pop) && (rl_last_func != rl_yank)) ||
+ !rl_kill_ring)
+ {
+ _rl_abort_internal ();
+ return 1;
+ }
+
+ l = strlen (rl_kill_ring[rl_kill_index]);
+ n = rl_point - l;
+ if (n >= 0 && STREQN (rl_line_buffer + n, rl_kill_ring[rl_kill_index], l))
+ {
+ rl_delete_text (n, rl_point);
+ rl_point = n;
+ rl_kill_index--;
+ if (rl_kill_index < 0)
+ rl_kill_index = rl_kill_ring_length - 1;
+ rl_yank (1, 0);
+ return 0;
+ }
+ else
+ {
+ _rl_abort_internal ();
+ return 1;
+ }
+}
+
+#if defined (VI_MODE)
+int
+rl_vi_yank_pop (int count, int key)
+{
+ int l, n;
+
+ if (((rl_last_func != rl_vi_yank_pop) && (rl_last_func != rl_vi_put)) ||
+ !rl_kill_ring)
+ {
+ _rl_abort_internal ();
+ return 1;
+ }
+
+ l = strlen (rl_kill_ring[rl_kill_index]);
+ n = rl_point - l;
+ if (n >= 0 && STREQN (rl_line_buffer + n, rl_kill_ring[rl_kill_index], l))
+ {
+ rl_delete_text (n, rl_point);
+ rl_point = n;
+ rl_kill_index--;
+ if (rl_kill_index < 0)
+ rl_kill_index = rl_kill_ring_length - 1;
+ rl_vi_put (1, 'p');
+ return 0;
+ }
+ else
+ {
+ _rl_abort_internal ();
+ return 1;
+ }
+}
+#endif /* VI_MODE */
+
+/* Yank the COUNTh argument from the previous history line, skipping
+ HISTORY_SKIP lines before looking for the `previous line'. */
+static int
+rl_yank_nth_arg_internal (int count, int key, int history_skip)
+{
+ register HIST_ENTRY *entry;
+ char *arg;
+ int i, pos;
+
+ pos = where_history ();
+
+ if (history_skip)
+ {
+ for (i = 0; i < history_skip; i++)
+ entry = previous_history ();
+ }
+
+ entry = previous_history ();
+
+ history_set_pos (pos);
+
+ if (entry == 0)
+ {
+ rl_ding ();
+ return 1;
+ }
+
+ arg = history_arg_extract (count, count, entry->line);
+ if (!arg || !*arg)
+ {
+ rl_ding ();
+ FREE (arg);
+ return 1;
+ }
+
+ rl_begin_undo_group ();
+
+ _rl_set_mark_at_pos (rl_point);
+
+#if defined (VI_MODE)
+ /* Vi mode always inserts a space before yanking the argument, and it
+ inserts it right *after* rl_point. */
+ if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap)
+ {
+ rl_vi_append_mode (1, key);
+ rl_insert_text (" ");
+ }
+#endif /* VI_MODE */
+
+ rl_insert_text (arg);
+ xfree (arg);
+
+ rl_end_undo_group ();
+ return 0;
+}
+
+/* Yank the COUNTth argument from the previous history line. */
+int
+rl_yank_nth_arg (int count, int key)
+{
+ return (rl_yank_nth_arg_internal (count, key, 0));
+}
+
+/* Yank the last argument from the previous history line. This `knows'
+ how rl_yank_nth_arg treats a count of `$'. With an argument, this
+ behaves the same as rl_yank_nth_arg. */
+int
+rl_yank_last_arg (int count, int key)
+{
+ static int history_skip = 0;
+ static int explicit_arg_p = 0;
+ static int count_passed = 1;
+ static int direction = 1;
+ static int undo_needed = 0;
+ int retval;
+
+ if (rl_last_func != rl_yank_last_arg)
+ {
+ history_skip = 0;
+ explicit_arg_p = rl_explicit_arg;
+ count_passed = count;
+ direction = 1;
+ }
+ else
+ {
+ if (undo_needed)
+ rl_do_undo ();
+ if (count < 0) /* XXX - was < 1 */
+ direction = -direction;
+ history_skip += direction;
+ if (history_skip < 0)
+ history_skip = 0;
+ }
+
+ if (explicit_arg_p)
+ retval = rl_yank_nth_arg_internal (count_passed, key, history_skip);
+ else
+ retval = rl_yank_nth_arg_internal ('$', key, history_skip);
+
+ undo_needed = retval == 0;
+ return retval;
+}
+
+/* Having read the special escape sequence denoting the beginning of a
+ `bracketed paste' sequence, read the rest of the pasted input until the
+ closing sequence and return the pasted text. */
+char *
+_rl_bracketed_text (size_t *lenp)
+{
+ int c;
+ size_t len, cap;
+ char *buf;
+
+ len = 0;
+ buf = xmalloc (cap = 64);
+ buf[0] = '\0';
+
+ RL_SETSTATE (RL_STATE_MOREINPUT);
+ while ((c = rl_read_key ()) >= 0)
+ {
+ if (RL_ISSTATE (RL_STATE_MACRODEF))
+ _rl_add_macro_char (c);
+
+ if (c == '\r') /* XXX */
+ c = '\n';
+
+ if (len == cap)
+ buf = xrealloc (buf, cap *= 2);
+
+ buf[len++] = c;
+ if (len >= BRACK_PASTE_SLEN && c == BRACK_PASTE_LAST &&
+ STREQN (buf + len - BRACK_PASTE_SLEN, BRACK_PASTE_SUFF, BRACK_PASTE_SLEN))
+ {
+ len -= BRACK_PASTE_SLEN;
+ break;
+ }
+ }
+ RL_UNSETSTATE (RL_STATE_MOREINPUT);
+
+ if (c >= 0)
+ {
+ if (len == cap)
+ buf = xrealloc (buf, cap + 1);
+ buf[len] = '\0';
+ }
+
+ if (lenp)
+ *lenp = len;
+ return (buf);
+}
+
+/* Having read the special escape sequence denoting the beginning of a
+ `bracketed paste' sequence, read the rest of the pasted input until the
+ closing sequence and insert the pasted text as a single unit without
+ interpretation. Temporarily highlight the inserted text. */
+int
+rl_bracketed_paste_begin (int count, int key)
+{
+ int retval, c;
+ size_t len, cap;
+ char *buf;
+
+ buf = _rl_bracketed_text (&len);
+ rl_mark = rl_point;
+ retval = rl_insert_text (buf) == len ? 0 : 1;
+ if (_rl_enable_active_region)
+ rl_activate_mark ();
+
+ xfree (buf);
+ return (retval);
+}
+
+int
+_rl_read_bracketed_paste_prefix (int c)
+{
+ char pbuf[BRACK_PASTE_SLEN+1], *pbpref;
+ int key, ind, j;
+
+ pbpref = BRACK_PASTE_PREF; /* XXX - debugging */
+ if (c != pbpref[0])
+ return (0);
+ pbuf[ind = 0] = c;
+ while (ind < BRACK_PASTE_SLEN-1 &&
+ (RL_ISSTATE (RL_STATE_INPUTPENDING|RL_STATE_MACROINPUT) == 0) &&
+ _rl_pushed_input_available () == 0 &&
+ _rl_input_queued (0))
+ {
+ key = rl_read_key (); /* XXX - for now */
+ if (key < 0)
+ break;
+ pbuf[++ind] = key;
+ if (pbuf[ind] != pbpref[ind])
+ break;
+ }
+
+ if (ind < BRACK_PASTE_SLEN-1) /* read incomplete sequence */
+ {
+ while (ind >= 0)
+ _rl_unget_char (pbuf[ind--]);
+ return (key < 0 ? key : 0);
+ }
+ return (key < 0 ? key : 1);
+}
+
+/* Get a character from wherever we read input, handling input in bracketed
+ paste mode. If we don't have or use bracketed paste mode, this can be
+ used in place of rl_read_key(). */
+int
+_rl_bracketed_read_key ()
+{
+ int c, r;
+ char *pbuf;
+ size_t pblen;
+
+ RL_SETSTATE(RL_STATE_MOREINPUT);
+ c = rl_read_key ();
+ RL_UNSETSTATE(RL_STATE_MOREINPUT);
+
+ if (c < 0)
+ return -1;
+
+ /* read pasted data with bracketed-paste mode enabled. */
+ if (_rl_enable_bracketed_paste && c == ESC && (r = _rl_read_bracketed_paste_prefix (c)) == 1)
+ {
+ pbuf = _rl_bracketed_text (&pblen);
+ if (pblen == 0)
+ {
+ xfree (pbuf);
+ return 0; /* XXX */
+ }
+ c = (unsigned char)pbuf[0];
+ if (pblen > 1)
+ {
+ while (--pblen > 0)
+ _rl_unget_char ((unsigned char)pbuf[pblen]);
+ }
+ xfree (pbuf);
+ }
+
+ return c;
+}
+
+/* Get a character from wherever we read input, handling input in bracketed
+ paste mode. If we don't have or use bracketed paste mode, this can be
+ used in place of rl_read_key(). */
+int
+_rl_bracketed_read_mbstring (char *mb, int mlen)
+{
+ int c, r;
+
+ c = _rl_bracketed_read_key ();
+ if (c < 0)
+ return -1;
+
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ c = _rl_read_mbstring (c, mb, mlen);
+ else
+#endif
+ mb[0] = c;
+ mb[mlen] = '\0'; /* just in case */
+
+ return c;
+}
+
+/* A special paste command for Windows users. */
+#if defined (_WIN32)
+#include <windows.h>
+
+int
+rl_paste_from_clipboard (int count, int key)
+{
+ char *data, *ptr;
+ int len;
+
+ if (OpenClipboard (NULL) == 0)
+ return (0);
+
+ data = (char *)GetClipboardData (CF_TEXT);
+ if (data)
+ {
+ ptr = strchr (data, '\r');
+ if (ptr)
+ {
+ len = ptr - data;
+ ptr = (char *)xmalloc (len + 1);
+ ptr[len] = '\0';
+ strncpy (ptr, data, len);
+ }
+ else
+ ptr = data;
+ _rl_set_mark_at_pos (rl_point);
+ rl_insert_text (ptr);
+ if (ptr != data)
+ xfree (ptr);
+ CloseClipboard ();
+ }
+ return (0);
+}
+#endif /* _WIN32 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 01:47:41 +0000