mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
5836a818ec
This reverts commitb558ff043d. This reverts commit4a11f20659. The initial import commit failed to retain local changes made to readline's configure.in (and the commit message erroneously stated that there were no local changes that needed to be reapplied). Also the import caused a couple of build errors and a scattering of testsuite regressions throughout many arches. It's probably better to start over with this import, hopefully more carefully next time.
1661 lines
40 KiB
C
1661 lines
40 KiB
C
/* histexpand.c -- history expansion. */
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/* Copyright (C) 1989-2010 Free Software Foundation, Inc.
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This file contains the GNU History Library (History), a set of
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routines for managing the text of previously typed lines.
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History is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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History is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with History. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
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# include <config.h>
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#endif
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#include <stdio.h>
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#if defined (HAVE_STDLIB_H)
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# include <stdlib.h>
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#else
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# include "ansi_stdlib.h"
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#endif /* HAVE_STDLIB_H */
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#if defined (HAVE_UNISTD_H)
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# ifndef _MINIX
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# include <sys/types.h>
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# endif
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# include <unistd.h>
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#endif
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#include "rlmbutil.h"
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#include "history.h"
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#include "histlib.h"
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#include "rlshell.h"
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#include "xmalloc.h"
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#define HISTORY_WORD_DELIMITERS " \t\n;&()|<>"
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#define HISTORY_QUOTE_CHARACTERS "\"'`"
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#define slashify_in_quotes "\\`\"$"
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typedef int _hist_search_func_t PARAMS((const char *, int));
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static char error_pointer;
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static char *subst_lhs;
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static char *subst_rhs;
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static int subst_lhs_len;
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static int subst_rhs_len;
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static char *get_history_word_specifier PARAMS((char *, char *, int *));
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static int history_tokenize_word PARAMS((const char *, int));
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static char **history_tokenize_internal PARAMS((const char *, int, int *));
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static char *history_substring PARAMS((const char *, int, int));
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static void freewords PARAMS((char **, int));
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static char *history_find_word PARAMS((char *, int));
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static char *quote_breaks PARAMS((char *));
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/* Variables exported by this file. */
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/* The character that represents the start of a history expansion
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request. This is usually `!'. */
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char history_expansion_char = '!';
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/* The character that invokes word substitution if found at the start of
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a line. This is usually `^'. */
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char history_subst_char = '^';
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/* During tokenization, if this character is seen as the first character
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of a word, then it, and all subsequent characters upto a newline are
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ignored. For a Bourne shell, this should be '#'. Bash special cases
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the interactive comment character to not be a comment delimiter. */
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char history_comment_char = '\0';
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/* The list of characters which inhibit the expansion of text if found
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immediately following history_expansion_char. */
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char *history_no_expand_chars = " \t\n\r=";
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/* If set to a non-zero value, single quotes inhibit history expansion.
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The default is 0. */
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int history_quotes_inhibit_expansion = 0;
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/* Used to split words by history_tokenize_internal. */
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char *history_word_delimiters = HISTORY_WORD_DELIMITERS;
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/* If set, this points to a function that is called to verify that a
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particular history expansion should be performed. */
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rl_linebuf_func_t *history_inhibit_expansion_function;
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/* **************************************************************** */
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/* */
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/* History Expansion */
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/* */
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/* **************************************************************** */
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/* Hairy history expansion on text, not tokens. This is of general
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use, and thus belongs in this library. */
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/* The last string searched for by a !?string? search. */
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static char *search_string;
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/* The last string matched by a !?string? search. */
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static char *search_match;
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/* Return the event specified at TEXT + OFFSET modifying OFFSET to
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point to after the event specifier. Just a pointer to the history
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line is returned; NULL is returned in the event of a bad specifier.
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You pass STRING with *INDEX equal to the history_expansion_char that
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begins this specification.
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DELIMITING_QUOTE is a character that is allowed to end the string
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specification for what to search for in addition to the normal
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characters `:', ` ', `\t', `\n', and sometimes `?'.
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So you might call this function like:
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line = get_history_event ("!echo:p", &index, 0); */
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char *
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get_history_event (string, caller_index, delimiting_quote)
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const char *string;
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int *caller_index;
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int delimiting_quote;
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{
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register int i;
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register char c;
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HIST_ENTRY *entry;
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int which, sign, local_index, substring_okay;
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_hist_search_func_t *search_func;
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char *temp;
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/* The event can be specified in a number of ways.
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!! the previous command
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!n command line N
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!-n current command-line minus N
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!str the most recent command starting with STR
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!?str[?]
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the most recent command containing STR
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All values N are determined via HISTORY_BASE. */
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i = *caller_index;
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if (string[i] != history_expansion_char)
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return ((char *)NULL);
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/* Move on to the specification. */
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i++;
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sign = 1;
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substring_okay = 0;
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#define RETURN_ENTRY(e, w) \
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return ((e = history_get (w)) ? e->line : (char *)NULL)
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/* Handle !! case. */
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if (string[i] == history_expansion_char)
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{
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i++;
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which = history_base + (history_length - 1);
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*caller_index = i;
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RETURN_ENTRY (entry, which);
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}
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/* Hack case of numeric line specification. */
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if (string[i] == '-')
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{
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sign = -1;
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i++;
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}
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if (_rl_digit_p (string[i]))
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{
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/* Get the extent of the digits and compute the value. */
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for (which = 0; _rl_digit_p (string[i]); i++)
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which = (which * 10) + _rl_digit_value (string[i]);
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*caller_index = i;
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if (sign < 0)
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which = (history_length + history_base) - which;
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RETURN_ENTRY (entry, which);
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}
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/* This must be something to search for. If the spec begins with
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a '?', then the string may be anywhere on the line. Otherwise,
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the string must be found at the start of a line. */
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if (string[i] == '?')
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{
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substring_okay++;
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i++;
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}
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/* Only a closing `?' or a newline delimit a substring search string. */
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for (local_index = i; c = string[i]; i++)
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{
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#if defined (HANDLE_MULTIBYTE)
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if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
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{
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int v;
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mbstate_t ps;
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memset (&ps, 0, sizeof (mbstate_t));
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/* These produce warnings because we're passing a const string to a
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function that takes a non-const string. */
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_rl_adjust_point ((char *)string, i, &ps);
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if ((v = _rl_get_char_len ((char *)string + i, &ps)) > 1)
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{
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i += v - 1;
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continue;
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}
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}
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#endif /* HANDLE_MULTIBYTE */
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if ((!substring_okay && (whitespace (c) || c == ':' ||
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(history_search_delimiter_chars && member (c, history_search_delimiter_chars)) ||
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string[i] == delimiting_quote)) ||
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string[i] == '\n' ||
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(substring_okay && string[i] == '?'))
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break;
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}
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which = i - local_index;
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temp = (char *)xmalloc (1 + which);
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if (which)
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strncpy (temp, string + local_index, which);
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temp[which] = '\0';
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if (substring_okay && string[i] == '?')
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i++;
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*caller_index = i;
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#define FAIL_SEARCH() \
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do { \
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history_offset = history_length; xfree (temp) ; return (char *)NULL; \
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} while (0)
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/* If there is no search string, try to use the previous search string,
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if one exists. If not, fail immediately. */
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if (*temp == '\0' && substring_okay)
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{
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if (search_string)
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{
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xfree (temp);
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temp = savestring (search_string);
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}
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else
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FAIL_SEARCH ();
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}
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search_func = substring_okay ? history_search : history_search_prefix;
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while (1)
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{
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local_index = (*search_func) (temp, -1);
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if (local_index < 0)
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FAIL_SEARCH ();
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if (local_index == 0 || substring_okay)
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{
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entry = current_history ();
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history_offset = history_length;
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/* If this was a substring search, then remember the
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string that we matched for word substitution. */
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if (substring_okay)
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{
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FREE (search_string);
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search_string = temp;
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FREE (search_match);
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search_match = history_find_word (entry->line, local_index);
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}
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else
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xfree (temp);
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return (entry->line);
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}
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if (history_offset)
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history_offset--;
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else
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FAIL_SEARCH ();
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}
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#undef FAIL_SEARCH
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#undef RETURN_ENTRY
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}
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/* Function for extracting single-quoted strings. Used for inhibiting
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history expansion within single quotes. */
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/* Extract the contents of STRING as if it is enclosed in single quotes.
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SINDEX, when passed in, is the offset of the character immediately
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following the opening single quote; on exit, SINDEX is left pointing
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to the closing single quote. FLAGS currently used to allow backslash
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to escape a single quote (e.g., for bash $'...'). */
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static void
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hist_string_extract_single_quoted (string, sindex, flags)
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char *string;
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int *sindex, flags;
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{
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register int i;
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for (i = *sindex; string[i] && string[i] != '\''; i++)
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{
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if ((flags & 1) && string[i] == '\\' && string[i+1])
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i++;
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}
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*sindex = i;
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}
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static char *
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quote_breaks (s)
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char *s;
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{
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register char *p, *r;
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char *ret;
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int len = 3;
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for (p = s; p && *p; p++, len++)
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{
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if (*p == '\'')
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len += 3;
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else if (whitespace (*p) || *p == '\n')
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len += 2;
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}
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r = ret = (char *)xmalloc (len);
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*r++ = '\'';
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for (p = s; p && *p; )
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{
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if (*p == '\'')
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{
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*r++ = '\'';
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*r++ = '\\';
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*r++ = '\'';
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*r++ = '\'';
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p++;
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}
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else if (whitespace (*p) || *p == '\n')
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{
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*r++ = '\'';
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*r++ = *p++;
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*r++ = '\'';
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}
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else
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*r++ = *p++;
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}
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*r++ = '\'';
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*r = '\0';
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return ret;
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}
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static char *
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hist_error(s, start, current, errtype)
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char *s;
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int start, current, errtype;
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{
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char *temp;
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const char *emsg;
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int ll, elen;
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ll = current - start;
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switch (errtype)
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{
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case EVENT_NOT_FOUND:
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emsg = "event not found";
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elen = 15;
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break;
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case BAD_WORD_SPEC:
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emsg = "bad word specifier";
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elen = 18;
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break;
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case SUBST_FAILED:
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emsg = "substitution failed";
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elen = 19;
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break;
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case BAD_MODIFIER:
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emsg = "unrecognized history modifier";
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elen = 29;
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break;
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case NO_PREV_SUBST:
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emsg = "no previous substitution";
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elen = 24;
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break;
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default:
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emsg = "unknown expansion error";
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elen = 23;
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break;
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}
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temp = (char *)xmalloc (ll + elen + 3);
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strncpy (temp, s + start, ll);
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temp[ll] = ':';
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temp[ll + 1] = ' ';
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strcpy (temp + ll + 2, emsg);
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return (temp);
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}
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/* Get a history substitution string from STR starting at *IPTR
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and return it. The length is returned in LENPTR.
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A backslash can quote the delimiter. If the string is the
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empty string, the previous pattern is used. If there is
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no previous pattern for the lhs, the last history search
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string is used.
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If IS_RHS is 1, we ignore empty strings and set the pattern
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to "" anyway. subst_lhs is not changed if the lhs is empty;
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subst_rhs is allowed to be set to the empty string. */
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static char *
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get_subst_pattern (str, iptr, delimiter, is_rhs, lenptr)
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char *str;
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int *iptr, delimiter, is_rhs, *lenptr;
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{
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register int si, i, j, k;
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char *s;
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#if defined (HANDLE_MULTIBYTE)
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mbstate_t ps;
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#endif
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s = (char *)NULL;
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i = *iptr;
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#if defined (HANDLE_MULTIBYTE)
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memset (&ps, 0, sizeof (mbstate_t));
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_rl_adjust_point (str, i, &ps);
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#endif
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for (si = i; str[si] && str[si] != delimiter; si++)
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#if defined (HANDLE_MULTIBYTE)
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if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
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{
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int v;
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if ((v = _rl_get_char_len (str + si, &ps)) > 1)
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si += v - 1;
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else if (str[si] == '\\' && str[si + 1] == delimiter)
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si++;
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}
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else
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#endif /* HANDLE_MULTIBYTE */
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if (str[si] == '\\' && str[si + 1] == delimiter)
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si++;
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if (si > i || is_rhs)
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{
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s = (char *)xmalloc (si - i + 1);
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for (j = 0, k = i; k < si; j++, k++)
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{
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/* Remove a backslash quoting the search string delimiter. */
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if (str[k] == '\\' && str[k + 1] == delimiter)
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k++;
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s[j] = str[k];
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}
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s[j] = '\0';
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if (lenptr)
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*lenptr = j;
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}
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i = si;
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if (str[i])
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i++;
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*iptr = i;
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return s;
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}
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static void
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postproc_subst_rhs ()
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{
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char *new;
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int i, j, new_size;
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new = (char *)xmalloc (new_size = subst_rhs_len + subst_lhs_len);
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for (i = j = 0; i < subst_rhs_len; i++)
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{
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if (subst_rhs[i] == '&')
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{
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if (j + subst_lhs_len >= new_size)
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new = (char *)xrealloc (new, (new_size = new_size * 2 + subst_lhs_len));
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strcpy (new + j, subst_lhs);
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j += subst_lhs_len;
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}
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else
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{
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/* a single backslash protects the `&' from lhs interpolation */
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if (subst_rhs[i] == '\\' && subst_rhs[i + 1] == '&')
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i++;
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if (j >= new_size)
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new = (char *)xrealloc (new, new_size *= 2);
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new[j++] = subst_rhs[i];
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}
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}
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new[j] = '\0';
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xfree (subst_rhs);
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subst_rhs = new;
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subst_rhs_len = j;
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}
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/* Expand the bulk of a history specifier starting at STRING[START].
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Returns 0 if everything is OK, -1 if an error occurred, and 1
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if the `p' modifier was supplied and the caller should just print
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the returned string. Returns the new index into string in
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*END_INDEX_PTR, and the expanded specifier in *RET_STRING. */
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static int
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history_expand_internal (string, start, end_index_ptr, ret_string, current_line)
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char *string;
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int start, *end_index_ptr;
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char **ret_string;
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char *current_line; /* for !# */
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{
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int i, n, starting_index;
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int substitute_globally, subst_bywords, want_quotes, print_only;
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char *event, *temp, *result, *tstr, *t, c, *word_spec;
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int result_len;
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#if defined (HANDLE_MULTIBYTE)
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mbstate_t ps;
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memset (&ps, 0, sizeof (mbstate_t));
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#endif
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result = (char *)xmalloc (result_len = 128);
|
|
|
|
i = start;
|
|
|
|
/* If it is followed by something that starts a word specifier,
|
|
then !! is implied as the event specifier. */
|
|
|
|
if (member (string[i + 1], ":$*%^"))
|
|
{
|
|
char fake_s[3];
|
|
int fake_i = 0;
|
|
i++;
|
|
fake_s[0] = fake_s[1] = history_expansion_char;
|
|
fake_s[2] = '\0';
|
|
event = get_history_event (fake_s, &fake_i, 0);
|
|
}
|
|
else if (string[i + 1] == '#')
|
|
{
|
|
i += 2;
|
|
event = current_line;
|
|
}
|
|
else
|
|
{
|
|
int quoted_search_delimiter = 0;
|
|
|
|
/* If the character before this `!' is a double or single
|
|
quote, then this expansion takes place inside of the
|
|
quoted string. If we have to search for some text ("!foo"),
|
|
allow the delimiter to end the search string. */
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
|
|
{
|
|
int ch, l;
|
|
l = _rl_find_prev_mbchar (string, i, MB_FIND_ANY);
|
|
ch = string[l];
|
|
/* XXX - original patch had i - 1 ??? If i == 0 it would fail. */
|
|
if (i && (ch == '\'' || ch == '"'))
|
|
quoted_search_delimiter = ch;
|
|
}
|
|
else
|
|
#endif /* HANDLE_MULTIBYTE */
|
|
if (i && (string[i - 1] == '\'' || string[i - 1] == '"'))
|
|
quoted_search_delimiter = string[i - 1];
|
|
|
|
event = get_history_event (string, &i, quoted_search_delimiter);
|
|
}
|
|
|
|
if (event == 0)
|
|
{
|
|
*ret_string = hist_error (string, start, i, EVENT_NOT_FOUND);
|
|
xfree (result);
|
|
return (-1);
|
|
}
|
|
|
|
/* If a word specifier is found, then do what that requires. */
|
|
starting_index = i;
|
|
word_spec = get_history_word_specifier (string, event, &i);
|
|
|
|
/* There is no such thing as a `malformed word specifier'. However,
|
|
it is possible for a specifier that has no match. In that case,
|
|
we complain. */
|
|
if (word_spec == (char *)&error_pointer)
|
|
{
|
|
*ret_string = hist_error (string, starting_index, i, BAD_WORD_SPEC);
|
|
xfree (result);
|
|
return (-1);
|
|
}
|
|
|
|
/* If no word specifier, than the thing of interest was the event. */
|
|
temp = word_spec ? savestring (word_spec) : savestring (event);
|
|
FREE (word_spec);
|
|
|
|
/* Perhaps there are other modifiers involved. Do what they say. */
|
|
want_quotes = substitute_globally = subst_bywords = print_only = 0;
|
|
starting_index = i;
|
|
|
|
while (string[i] == ':')
|
|
{
|
|
c = string[i + 1];
|
|
|
|
if (c == 'g' || c == 'a')
|
|
{
|
|
substitute_globally = 1;
|
|
i++;
|
|
c = string[i + 1];
|
|
}
|
|
else if (c == 'G')
|
|
{
|
|
subst_bywords = 1;
|
|
i++;
|
|
c = string[i + 1];
|
|
}
|
|
|
|
switch (c)
|
|
{
|
|
default:
|
|
*ret_string = hist_error (string, i+1, i+2, BAD_MODIFIER);
|
|
xfree (result);
|
|
xfree (temp);
|
|
return -1;
|
|
|
|
case 'q':
|
|
want_quotes = 'q';
|
|
break;
|
|
|
|
case 'x':
|
|
want_quotes = 'x';
|
|
break;
|
|
|
|
/* :p means make this the last executed line. So we
|
|
return an error state after adding this line to the
|
|
history. */
|
|
case 'p':
|
|
print_only++;
|
|
break;
|
|
|
|
/* :t discards all but the last part of the pathname. */
|
|
case 't':
|
|
tstr = strrchr (temp, '/');
|
|
if (tstr)
|
|
{
|
|
tstr++;
|
|
t = savestring (tstr);
|
|
xfree (temp);
|
|
temp = t;
|
|
}
|
|
break;
|
|
|
|
/* :h discards the last part of a pathname. */
|
|
case 'h':
|
|
tstr = strrchr (temp, '/');
|
|
if (tstr)
|
|
*tstr = '\0';
|
|
break;
|
|
|
|
/* :r discards the suffix. */
|
|
case 'r':
|
|
tstr = strrchr (temp, '.');
|
|
if (tstr)
|
|
*tstr = '\0';
|
|
break;
|
|
|
|
/* :e discards everything but the suffix. */
|
|
case 'e':
|
|
tstr = strrchr (temp, '.');
|
|
if (tstr)
|
|
{
|
|
t = savestring (tstr);
|
|
xfree (temp);
|
|
temp = t;
|
|
}
|
|
break;
|
|
|
|
/* :s/this/that substitutes `that' for the first
|
|
occurrence of `this'. :gs/this/that substitutes `that'
|
|
for each occurrence of `this'. :& repeats the last
|
|
substitution. :g& repeats the last substitution
|
|
globally. */
|
|
|
|
case '&':
|
|
case 's':
|
|
{
|
|
char *new_event;
|
|
int delimiter, failed, si, l_temp, ws, we;
|
|
|
|
if (c == 's')
|
|
{
|
|
if (i + 2 < (int)strlen (string))
|
|
{
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
|
|
{
|
|
_rl_adjust_point (string, i + 2, &ps);
|
|
if (_rl_get_char_len (string + i + 2, &ps) > 1)
|
|
delimiter = 0;
|
|
else
|
|
delimiter = string[i + 2];
|
|
}
|
|
else
|
|
#endif /* HANDLE_MULTIBYTE */
|
|
delimiter = string[i + 2];
|
|
}
|
|
else
|
|
break; /* no search delimiter */
|
|
|
|
i += 3;
|
|
|
|
t = get_subst_pattern (string, &i, delimiter, 0, &subst_lhs_len);
|
|
/* An empty substitution lhs with no previous substitution
|
|
uses the last search string as the lhs. */
|
|
if (t)
|
|
{
|
|
FREE (subst_lhs);
|
|
subst_lhs = t;
|
|
}
|
|
else if (!subst_lhs)
|
|
{
|
|
if (search_string && *search_string)
|
|
{
|
|
subst_lhs = savestring (search_string);
|
|
subst_lhs_len = strlen (subst_lhs);
|
|
}
|
|
else
|
|
{
|
|
subst_lhs = (char *) NULL;
|
|
subst_lhs_len = 0;
|
|
}
|
|
}
|
|
|
|
FREE (subst_rhs);
|
|
subst_rhs = get_subst_pattern (string, &i, delimiter, 1, &subst_rhs_len);
|
|
|
|
/* If `&' appears in the rhs, it's supposed to be replaced
|
|
with the lhs. */
|
|
if (member ('&', subst_rhs))
|
|
postproc_subst_rhs ();
|
|
}
|
|
else
|
|
i += 2;
|
|
|
|
/* If there is no lhs, the substitution can't succeed. */
|
|
if (subst_lhs_len == 0)
|
|
{
|
|
*ret_string = hist_error (string, starting_index, i, NO_PREV_SUBST);
|
|
xfree (result);
|
|
xfree (temp);
|
|
return -1;
|
|
}
|
|
|
|
l_temp = strlen (temp);
|
|
/* Ignore impossible cases. */
|
|
if (subst_lhs_len > l_temp)
|
|
{
|
|
*ret_string = hist_error (string, starting_index, i, SUBST_FAILED);
|
|
xfree (result);
|
|
xfree (temp);
|
|
return (-1);
|
|
}
|
|
|
|
/* Find the first occurrence of THIS in TEMP. */
|
|
/* Substitute SUBST_RHS for SUBST_LHS in TEMP. There are three
|
|
cases to consider:
|
|
|
|
1. substitute_globally == subst_bywords == 0
|
|
2. substitute_globally == 1 && subst_bywords == 0
|
|
3. substitute_globally == 0 && subst_bywords == 1
|
|
|
|
In the first case, we substitute for the first occurrence only.
|
|
In the second case, we substitute for every occurrence.
|
|
In the third case, we tokenize into words and substitute the
|
|
first occurrence of each word. */
|
|
|
|
si = we = 0;
|
|
for (failed = 1; (si + subst_lhs_len) <= l_temp; si++)
|
|
{
|
|
/* First skip whitespace and find word boundaries if
|
|
we're past the end of the word boundary we found
|
|
the last time. */
|
|
if (subst_bywords && si > we)
|
|
{
|
|
for (; temp[si] && whitespace (temp[si]); si++)
|
|
;
|
|
ws = si;
|
|
we = history_tokenize_word (temp, si);
|
|
}
|
|
|
|
if (STREQN (temp+si, subst_lhs, subst_lhs_len))
|
|
{
|
|
int len = subst_rhs_len - subst_lhs_len + l_temp;
|
|
new_event = (char *)xmalloc (1 + len);
|
|
strncpy (new_event, temp, si);
|
|
strncpy (new_event + si, subst_rhs, subst_rhs_len);
|
|
strncpy (new_event + si + subst_rhs_len,
|
|
temp + si + subst_lhs_len,
|
|
l_temp - (si + subst_lhs_len));
|
|
new_event[len] = '\0';
|
|
xfree (temp);
|
|
temp = new_event;
|
|
|
|
failed = 0;
|
|
|
|
if (substitute_globally)
|
|
{
|
|
/* Reported to fix a bug that causes it to skip every
|
|
other match when matching a single character. Was
|
|
si += subst_rhs_len previously. */
|
|
si += subst_rhs_len - 1;
|
|
l_temp = strlen (temp);
|
|
substitute_globally++;
|
|
continue;
|
|
}
|
|
else if (subst_bywords)
|
|
{
|
|
si = we;
|
|
l_temp = strlen (temp);
|
|
continue;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (substitute_globally > 1)
|
|
{
|
|
substitute_globally = 0;
|
|
continue; /* don't want to increment i */
|
|
}
|
|
|
|
if (failed == 0)
|
|
continue; /* don't want to increment i */
|
|
|
|
*ret_string = hist_error (string, starting_index, i, SUBST_FAILED);
|
|
xfree (result);
|
|
xfree (temp);
|
|
return (-1);
|
|
}
|
|
}
|
|
i += 2;
|
|
}
|
|
/* Done with modfiers. */
|
|
/* Believe it or not, we have to back the pointer up by one. */
|
|
--i;
|
|
|
|
if (want_quotes)
|
|
{
|
|
char *x;
|
|
|
|
if (want_quotes == 'q')
|
|
x = sh_single_quote (temp);
|
|
else if (want_quotes == 'x')
|
|
x = quote_breaks (temp);
|
|
else
|
|
x = savestring (temp);
|
|
|
|
xfree (temp);
|
|
temp = x;
|
|
}
|
|
|
|
n = strlen (temp);
|
|
if (n >= result_len)
|
|
result = (char *)xrealloc (result, n + 2);
|
|
strcpy (result, temp);
|
|
xfree (temp);
|
|
|
|
*end_index_ptr = i;
|
|
*ret_string = result;
|
|
return (print_only);
|
|
}
|
|
|
|
/* Expand the string STRING, placing the result into OUTPUT, a pointer
|
|
to a string. Returns:
|
|
|
|
-1) If there was an error in expansion.
|
|
0) If no expansions took place (or, if the only change in
|
|
the text was the de-slashifying of the history expansion
|
|
character)
|
|
1) If expansions did take place
|
|
2) If the `p' modifier was given and the caller should print the result
|
|
|
|
If an error ocurred in expansion, then OUTPUT contains a descriptive
|
|
error message. */
|
|
|
|
#define ADD_STRING(s) \
|
|
do \
|
|
{ \
|
|
int sl = strlen (s); \
|
|
j += sl; \
|
|
if (j >= result_len) \
|
|
{ \
|
|
while (j >= result_len) \
|
|
result_len += 128; \
|
|
result = (char *)xrealloc (result, result_len); \
|
|
} \
|
|
strcpy (result + j - sl, s); \
|
|
} \
|
|
while (0)
|
|
|
|
#define ADD_CHAR(c) \
|
|
do \
|
|
{ \
|
|
if (j >= result_len - 1) \
|
|
result = (char *)xrealloc (result, result_len += 64); \
|
|
result[j++] = c; \
|
|
result[j] = '\0'; \
|
|
} \
|
|
while (0)
|
|
|
|
int
|
|
history_expand (hstring, output)
|
|
char *hstring;
|
|
char **output;
|
|
{
|
|
register int j;
|
|
int i, r, l, passc, cc, modified, eindex, only_printing, dquote, flag;
|
|
char *string;
|
|
|
|
/* The output string, and its length. */
|
|
int result_len;
|
|
char *result;
|
|
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
char mb[MB_LEN_MAX];
|
|
mbstate_t ps;
|
|
#endif
|
|
|
|
/* Used when adding the string. */
|
|
char *temp;
|
|
|
|
if (output == 0)
|
|
return 0;
|
|
|
|
/* Setting the history expansion character to 0 inhibits all
|
|
history expansion. */
|
|
if (history_expansion_char == 0)
|
|
{
|
|
*output = savestring (hstring);
|
|
return (0);
|
|
}
|
|
|
|
/* Prepare the buffer for printing error messages. */
|
|
result = (char *)xmalloc (result_len = 256);
|
|
result[0] = '\0';
|
|
|
|
only_printing = modified = 0;
|
|
l = strlen (hstring);
|
|
|
|
/* Grovel the string. Only backslash and single quotes can quote the
|
|
history escape character. We also handle arg specifiers. */
|
|
|
|
/* Before we grovel forever, see if the history_expansion_char appears
|
|
anywhere within the text. */
|
|
|
|
/* The quick substitution character is a history expansion all right. That
|
|
is to say, "^this^that^" is equivalent to "!!:s^this^that^", and in fact,
|
|
that is the substitution that we do. */
|
|
if (hstring[0] == history_subst_char)
|
|
{
|
|
string = (char *)xmalloc (l + 5);
|
|
|
|
string[0] = string[1] = history_expansion_char;
|
|
string[2] = ':';
|
|
string[3] = 's';
|
|
strcpy (string + 4, hstring);
|
|
l += 4;
|
|
}
|
|
else
|
|
{
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
memset (&ps, 0, sizeof (mbstate_t));
|
|
#endif
|
|
|
|
string = hstring;
|
|
/* If not quick substitution, still maybe have to do expansion. */
|
|
|
|
/* `!' followed by one of the characters in history_no_expand_chars
|
|
is NOT an expansion. */
|
|
for (i = dquote = 0; string[i]; i++)
|
|
{
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
|
|
{
|
|
int v;
|
|
v = _rl_get_char_len (string + i, &ps);
|
|
if (v > 1)
|
|
{
|
|
i += v - 1;
|
|
continue;
|
|
}
|
|
}
|
|
#endif /* HANDLE_MULTIBYTE */
|
|
|
|
cc = string[i + 1];
|
|
/* The history_comment_char, if set, appearing at the beginning
|
|
of a word signifies that the rest of the line should not have
|
|
history expansion performed on it.
|
|
Skip the rest of the line and break out of the loop. */
|
|
if (history_comment_char && string[i] == history_comment_char &&
|
|
(i == 0 || member (string[i - 1], history_word_delimiters)))
|
|
{
|
|
while (string[i])
|
|
i++;
|
|
break;
|
|
}
|
|
else if (string[i] == history_expansion_char)
|
|
{
|
|
if (cc == 0 || member (cc, history_no_expand_chars))
|
|
continue;
|
|
/* If the calling application has set
|
|
history_inhibit_expansion_function to a function that checks
|
|
for special cases that should not be history expanded,
|
|
call the function and skip the expansion if it returns a
|
|
non-zero value. */
|
|
else if (history_inhibit_expansion_function &&
|
|
(*history_inhibit_expansion_function) (string, i))
|
|
continue;
|
|
else
|
|
break;
|
|
}
|
|
/* Shell-like quoting: allow backslashes to quote double quotes
|
|
inside a double-quoted string. */
|
|
else if (dquote && string[i] == '\\' && cc == '"')
|
|
i++;
|
|
/* More shell-like quoting: if we're paying attention to single
|
|
quotes and letting them quote the history expansion character,
|
|
then we need to pay attention to double quotes, because single
|
|
quotes are not special inside double-quoted strings. */
|
|
else if (history_quotes_inhibit_expansion && string[i] == '"')
|
|
{
|
|
dquote = 1 - dquote;
|
|
}
|
|
else if (dquote == 0 && history_quotes_inhibit_expansion && string[i] == '\'')
|
|
{
|
|
/* If this is bash, single quotes inhibit history expansion. */
|
|
flag = (i > 0 && string[i - 1] == '$');
|
|
i++;
|
|
hist_string_extract_single_quoted (string, &i, flag);
|
|
}
|
|
else if (history_quotes_inhibit_expansion && string[i] == '\\')
|
|
{
|
|
/* If this is bash, allow backslashes to quote single
|
|
quotes and the history expansion character. */
|
|
if (cc == '\'' || cc == history_expansion_char)
|
|
i++;
|
|
}
|
|
|
|
}
|
|
|
|
if (string[i] != history_expansion_char)
|
|
{
|
|
xfree (result);
|
|
*output = savestring (string);
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
/* Extract and perform the substitution. */
|
|
for (passc = dquote = i = j = 0; i < l; i++)
|
|
{
|
|
int tchar = string[i];
|
|
|
|
if (passc)
|
|
{
|
|
passc = 0;
|
|
ADD_CHAR (tchar);
|
|
continue;
|
|
}
|
|
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
|
|
{
|
|
int k, c;
|
|
|
|
c = tchar;
|
|
memset (mb, 0, sizeof (mb));
|
|
for (k = 0; k < MB_LEN_MAX; k++)
|
|
{
|
|
mb[k] = (char)c;
|
|
memset (&ps, 0, sizeof (mbstate_t));
|
|
if (_rl_get_char_len (mb, &ps) == -2)
|
|
c = string[++i];
|
|
else
|
|
break;
|
|
}
|
|
if (strlen (mb) > 1)
|
|
{
|
|
ADD_STRING (mb);
|
|
continue;
|
|
}
|
|
}
|
|
#endif /* HANDLE_MULTIBYTE */
|
|
|
|
if (tchar == history_expansion_char)
|
|
tchar = -3;
|
|
else if (tchar == history_comment_char)
|
|
tchar = -2;
|
|
|
|
switch (tchar)
|
|
{
|
|
default:
|
|
ADD_CHAR (string[i]);
|
|
break;
|
|
|
|
case '\\':
|
|
passc++;
|
|
ADD_CHAR (tchar);
|
|
break;
|
|
|
|
case '"':
|
|
dquote = 1 - dquote;
|
|
ADD_CHAR (tchar);
|
|
break;
|
|
|
|
case '\'':
|
|
{
|
|
/* If history_quotes_inhibit_expansion is set, single quotes
|
|
inhibit history expansion. */
|
|
if (dquote == 0 && history_quotes_inhibit_expansion)
|
|
{
|
|
int quote, slen;
|
|
|
|
flag = (i > 0 && string[i - 1] == '$');
|
|
quote = i++;
|
|
hist_string_extract_single_quoted (string, &i, flag);
|
|
|
|
slen = i - quote + 2;
|
|
temp = (char *)xmalloc (slen);
|
|
strncpy (temp, string + quote, slen);
|
|
temp[slen - 1] = '\0';
|
|
ADD_STRING (temp);
|
|
xfree (temp);
|
|
}
|
|
else
|
|
ADD_CHAR (string[i]);
|
|
break;
|
|
}
|
|
|
|
case -2: /* history_comment_char */
|
|
if (i == 0 || member (string[i - 1], history_word_delimiters))
|
|
{
|
|
temp = (char *)xmalloc (l - i + 1);
|
|
strcpy (temp, string + i);
|
|
ADD_STRING (temp);
|
|
xfree (temp);
|
|
i = l;
|
|
}
|
|
else
|
|
ADD_CHAR (string[i]);
|
|
break;
|
|
|
|
case -3: /* history_expansion_char */
|
|
cc = string[i + 1];
|
|
|
|
/* If the history_expansion_char is followed by one of the
|
|
characters in history_no_expand_chars, then it is not a
|
|
candidate for expansion of any kind. */
|
|
if (cc == 0 || member (cc, history_no_expand_chars) ||
|
|
(history_inhibit_expansion_function && (*history_inhibit_expansion_function) (string, i)))
|
|
{
|
|
ADD_CHAR (string[i]);
|
|
break;
|
|
}
|
|
|
|
#if defined (NO_BANG_HASH_MODIFIERS)
|
|
/* There is something that is listed as a `word specifier' in csh
|
|
documentation which means `the expanded text to this point'.
|
|
That is not a word specifier, it is an event specifier. If we
|
|
don't want to allow modifiers with `!#', just stick the current
|
|
output line in again. */
|
|
if (cc == '#')
|
|
{
|
|
if (result)
|
|
{
|
|
temp = (char *)xmalloc (1 + strlen (result));
|
|
strcpy (temp, result);
|
|
ADD_STRING (temp);
|
|
xfree (temp);
|
|
}
|
|
i++;
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
r = history_expand_internal (string, i, &eindex, &temp, result);
|
|
if (r < 0)
|
|
{
|
|
*output = temp;
|
|
xfree (result);
|
|
if (string != hstring)
|
|
xfree (string);
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
if (temp)
|
|
{
|
|
modified++;
|
|
if (*temp)
|
|
ADD_STRING (temp);
|
|
xfree (temp);
|
|
}
|
|
only_printing = r == 1;
|
|
i = eindex;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
*output = result;
|
|
if (string != hstring)
|
|
xfree (string);
|
|
|
|
if (only_printing)
|
|
{
|
|
#if 0
|
|
add_history (result);
|
|
#endif
|
|
return (2);
|
|
}
|
|
|
|
return (modified != 0);
|
|
}
|
|
|
|
/* Return a consed string which is the word specified in SPEC, and found
|
|
in FROM. NULL is returned if there is no spec. The address of
|
|
ERROR_POINTER is returned if the word specified cannot be found.
|
|
CALLER_INDEX is the offset in SPEC to start looking; it is updated
|
|
to point to just after the last character parsed. */
|
|
static char *
|
|
get_history_word_specifier (spec, from, caller_index)
|
|
char *spec, *from;
|
|
int *caller_index;
|
|
{
|
|
register int i = *caller_index;
|
|
int first, last;
|
|
int expecting_word_spec = 0;
|
|
char *result;
|
|
|
|
/* The range of words to return doesn't exist yet. */
|
|
first = last = 0;
|
|
result = (char *)NULL;
|
|
|
|
/* If we found a colon, then this *must* be a word specification. If
|
|
it isn't, then it is an error. */
|
|
if (spec[i] == ':')
|
|
{
|
|
i++;
|
|
expecting_word_spec++;
|
|
}
|
|
|
|
/* Handle special cases first. */
|
|
|
|
/* `%' is the word last searched for. */
|
|
if (spec[i] == '%')
|
|
{
|
|
*caller_index = i + 1;
|
|
return (search_match ? savestring (search_match) : savestring (""));
|
|
}
|
|
|
|
/* `*' matches all of the arguments, but not the command. */
|
|
if (spec[i] == '*')
|
|
{
|
|
*caller_index = i + 1;
|
|
result = history_arg_extract (1, '$', from);
|
|
return (result ? result : savestring (""));
|
|
}
|
|
|
|
/* `$' is last arg. */
|
|
if (spec[i] == '$')
|
|
{
|
|
*caller_index = i + 1;
|
|
return (history_arg_extract ('$', '$', from));
|
|
}
|
|
|
|
/* Try to get FIRST and LAST figured out. */
|
|
|
|
if (spec[i] == '-')
|
|
first = 0;
|
|
else if (spec[i] == '^')
|
|
{
|
|
first = 1;
|
|
i++;
|
|
}
|
|
else if (_rl_digit_p (spec[i]) && expecting_word_spec)
|
|
{
|
|
for (first = 0; _rl_digit_p (spec[i]); i++)
|
|
first = (first * 10) + _rl_digit_value (spec[i]);
|
|
}
|
|
else
|
|
return ((char *)NULL); /* no valid `first' for word specifier */
|
|
|
|
if (spec[i] == '^' || spec[i] == '*')
|
|
{
|
|
last = (spec[i] == '^') ? 1 : '$'; /* x* abbreviates x-$ */
|
|
i++;
|
|
}
|
|
else if (spec[i] != '-')
|
|
last = first;
|
|
else
|
|
{
|
|
i++;
|
|
|
|
if (_rl_digit_p (spec[i]))
|
|
{
|
|
for (last = 0; _rl_digit_p (spec[i]); i++)
|
|
last = (last * 10) + _rl_digit_value (spec[i]);
|
|
}
|
|
else if (spec[i] == '$')
|
|
{
|
|
i++;
|
|
last = '$';
|
|
}
|
|
#if 0
|
|
else if (!spec[i] || spec[i] == ':')
|
|
/* check against `:' because there could be a modifier separator */
|
|
#else
|
|
else
|
|
/* csh seems to allow anything to terminate the word spec here,
|
|
leaving it as an abbreviation. */
|
|
#endif
|
|
last = -1; /* x- abbreviates x-$ omitting word `$' */
|
|
}
|
|
|
|
*caller_index = i;
|
|
|
|
if (last >= first || last == '$' || last < 0)
|
|
result = history_arg_extract (first, last, from);
|
|
|
|
return (result ? result : (char *)&error_pointer);
|
|
}
|
|
|
|
/* Extract the args specified, starting at FIRST, and ending at LAST.
|
|
The args are taken from STRING. If either FIRST or LAST is < 0,
|
|
then make that arg count from the right (subtract from the number of
|
|
tokens, so that FIRST = -1 means the next to last token on the line).
|
|
If LAST is `$' the last arg from STRING is used. */
|
|
char *
|
|
history_arg_extract (first, last, string)
|
|
int first, last;
|
|
const char *string;
|
|
{
|
|
register int i, len;
|
|
char *result;
|
|
int size, offset;
|
|
char **list;
|
|
|
|
/* XXX - think about making history_tokenize return a struct array,
|
|
each struct in array being a string and a length to avoid the
|
|
calls to strlen below. */
|
|
if ((list = history_tokenize (string)) == NULL)
|
|
return ((char *)NULL);
|
|
|
|
for (len = 0; list[len]; len++)
|
|
;
|
|
|
|
if (last < 0)
|
|
last = len + last - 1;
|
|
|
|
if (first < 0)
|
|
first = len + first - 1;
|
|
|
|
if (last == '$')
|
|
last = len - 1;
|
|
|
|
if (first == '$')
|
|
first = len - 1;
|
|
|
|
last++;
|
|
|
|
if (first >= len || last > len || first < 0 || last < 0 || first > last)
|
|
result = ((char *)NULL);
|
|
else
|
|
{
|
|
for (size = 0, i = first; i < last; i++)
|
|
size += strlen (list[i]) + 1;
|
|
result = (char *)xmalloc (size + 1);
|
|
result[0] = '\0';
|
|
|
|
for (i = first, offset = 0; i < last; i++)
|
|
{
|
|
strcpy (result + offset, list[i]);
|
|
offset += strlen (list[i]);
|
|
if (i + 1 < last)
|
|
{
|
|
result[offset++] = ' ';
|
|
result[offset] = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < len; i++)
|
|
xfree (list[i]);
|
|
xfree (list);
|
|
|
|
return (result);
|
|
}
|
|
|
|
static int
|
|
history_tokenize_word (string, ind)
|
|
const char *string;
|
|
int ind;
|
|
{
|
|
register int i;
|
|
int delimiter, nestdelim, delimopen;
|
|
|
|
i = ind;
|
|
delimiter = nestdelim = 0;
|
|
|
|
if (member (string[i], "()\n"))
|
|
{
|
|
i++;
|
|
return i;
|
|
}
|
|
|
|
if (member (string[i], "<>;&|$"))
|
|
{
|
|
int peek = string[i + 1];
|
|
|
|
if (peek == string[i] && peek != '$')
|
|
{
|
|
if (peek == '<' && string[i + 2] == '-')
|
|
i++;
|
|
else if (peek == '<' && string[i + 2] == '<')
|
|
i++;
|
|
i += 2;
|
|
return i;
|
|
}
|
|
else if ((peek == '&' && (string[i] == '>' || string[i] == '<')) ||
|
|
(peek == '>' && string[i] == '&'))
|
|
{
|
|
i += 2;
|
|
return i;
|
|
}
|
|
/* XXX - separated out for later -- bash-4.2 */
|
|
else if ((peek == '(' && (string[i] == '>' || string[i] == '<')) || /* ) */
|
|
(peek == '(' && string[i] == '$')) /*)*/
|
|
{
|
|
i += 2;
|
|
delimopen = '(';
|
|
delimiter = ')';
|
|
nestdelim = 1;
|
|
goto get_word;
|
|
}
|
|
#if 0
|
|
else if (peek == '\'' && string[i] == '$')
|
|
{
|
|
i += 2; /* XXX */
|
|
return i;
|
|
}
|
|
#endif
|
|
|
|
if (string[i] != '$')
|
|
{
|
|
i++;
|
|
return i;
|
|
}
|
|
}
|
|
|
|
/* same code also used for $(...)/<(...)/>(...) above */
|
|
if (member (string[i], "!@?+*"))
|
|
{
|
|
int peek = string[i + 1];
|
|
|
|
if (peek == '(') /*)*/
|
|
{
|
|
/* Shell extended globbing patterns */
|
|
i += 2;
|
|
delimopen = '(';
|
|
delimiter = ')'; /* XXX - not perfect */
|
|
nestdelim = 1;
|
|
}
|
|
}
|
|
|
|
get_word:
|
|
/* Get word from string + i; */
|
|
|
|
if (delimiter == 0 && member (string[i], HISTORY_QUOTE_CHARACTERS))
|
|
delimiter = string[i++];
|
|
|
|
for (; string[i]; i++)
|
|
{
|
|
if (string[i] == '\\' && string[i + 1] == '\n')
|
|
{
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
if (string[i] == '\\' && delimiter != '\'' &&
|
|
(delimiter != '"' || member (string[i], slashify_in_quotes)))
|
|
{
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
/* delimiter must be set and set to something other than a quote if
|
|
nestdelim is set, so these tests are safe. */
|
|
if (nestdelim && string[i] == delimopen)
|
|
{
|
|
nestdelim++;
|
|
continue;
|
|
}
|
|
if (nestdelim && string[i] == delimiter)
|
|
{
|
|
nestdelim--;
|
|
if (nestdelim == 0)
|
|
delimiter = 0;
|
|
continue;
|
|
}
|
|
|
|
if (delimiter && string[i] == delimiter)
|
|
{
|
|
delimiter = 0;
|
|
continue;
|
|
}
|
|
|
|
if (delimiter == 0 && (member (string[i], history_word_delimiters)))
|
|
break;
|
|
|
|
if (delimiter == 0 && member (string[i], HISTORY_QUOTE_CHARACTERS))
|
|
delimiter = string[i];
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
static char *
|
|
history_substring (string, start, end)
|
|
const char *string;
|
|
int start, end;
|
|
{
|
|
register int len;
|
|
register char *result;
|
|
|
|
len = end - start;
|
|
result = (char *)xmalloc (len + 1);
|
|
strncpy (result, string + start, len);
|
|
result[len] = '\0';
|
|
return result;
|
|
}
|
|
|
|
/* Parse STRING into tokens and return an array of strings. If WIND is
|
|
not -1 and INDP is not null, we also want the word surrounding index
|
|
WIND. The position in the returned array of strings is returned in
|
|
*INDP. */
|
|
static char **
|
|
history_tokenize_internal (string, wind, indp)
|
|
const char *string;
|
|
int wind, *indp;
|
|
{
|
|
char **result;
|
|
register int i, start, result_index, size;
|
|
|
|
/* If we're searching for a string that's not part of a word (e.g., " "),
|
|
make sure we set *INDP to a reasonable value. */
|
|
if (indp && wind != -1)
|
|
*indp = -1;
|
|
|
|
/* Get a token, and stuff it into RESULT. The tokens are split
|
|
exactly where the shell would split them. */
|
|
for (i = result_index = size = 0, result = (char **)NULL; string[i]; )
|
|
{
|
|
/* Skip leading whitespace. */
|
|
for (; string[i] && whitespace (string[i]); i++)
|
|
;
|
|
if (string[i] == 0 || string[i] == history_comment_char)
|
|
return (result);
|
|
|
|
start = i;
|
|
|
|
i = history_tokenize_word (string, start);
|
|
|
|
/* If we have a non-whitespace delimiter character (which would not be
|
|
skipped by the loop above), use it and any adjacent delimiters to
|
|
make a separate field. Any adjacent white space will be skipped the
|
|
next time through the loop. */
|
|
if (i == start && history_word_delimiters)
|
|
{
|
|
i++;
|
|
while (string[i] && member (string[i], history_word_delimiters))
|
|
i++;
|
|
}
|
|
|
|
/* If we are looking for the word in which the character at a
|
|
particular index falls, remember it. */
|
|
if (indp && wind != -1 && wind >= start && wind < i)
|
|
*indp = result_index;
|
|
|
|
if (result_index + 2 >= size)
|
|
result = (char **)xrealloc (result, ((size += 10) * sizeof (char *)));
|
|
|
|
result[result_index++] = history_substring (string, start, i);
|
|
result[result_index] = (char *)NULL;
|
|
}
|
|
|
|
return (result);
|
|
}
|
|
|
|
/* Return an array of tokens, much as the shell might. The tokens are
|
|
parsed out of STRING. */
|
|
char **
|
|
history_tokenize (string)
|
|
const char *string;
|
|
{
|
|
return (history_tokenize_internal (string, -1, (int *)NULL));
|
|
}
|
|
|
|
/* Free members of WORDS from START to an empty string */
|
|
static void
|
|
freewords (words, start)
|
|
char **words;
|
|
int start;
|
|
{
|
|
register int i;
|
|
|
|
for (i = start; words[i]; i++)
|
|
xfree (words[i]);
|
|
}
|
|
|
|
/* Find and return the word which contains the character at index IND
|
|
in the history line LINE. Used to save the word matched by the
|
|
last history !?string? search. */
|
|
static char *
|
|
history_find_word (line, ind)
|
|
char *line;
|
|
int ind;
|
|
{
|
|
char **words, *s;
|
|
int i, wind;
|
|
|
|
words = history_tokenize_internal (line, ind, &wind);
|
|
if (wind == -1 || words == 0)
|
|
{
|
|
if (words)
|
|
freewords (words, 0);
|
|
FREE (words);
|
|
return ((char *)NULL);
|
|
}
|
|
s = words[wind];
|
|
for (i = 0; i < wind; i++)
|
|
xfree (words[i]);
|
|
freewords (words, wind + 1);
|
|
xfree (words);
|
|
return s;
|
|
}
|