/* histexpand.c -- history expansion. */
-/* Copyright (C) 1989, 1992 Free Software Foundation, Inc.
+/* Copyright (C) 1989-2012 Free Software Foundation, Inc.
- This file contains the GNU History Library (the Library), a set of
+ This file contains the GNU History Library (History), a set of
routines for managing the text of previously typed lines.
- The Library is free software; you can redistribute it and/or modify
+ History 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 1, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- The Library is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ History is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- The GNU General Public License is often shipped with GNU software, and
- is generally kept in a file called COPYING or LICENSE. If you do not
- have a copy of the license, write to the Free Software Foundation,
- 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with History. If not, see <http://www.gnu.org/licenses/>.
+*/
#define READLINE_LIBRARY
# include <unistd.h>
#endif
-#if defined (HAVE_STRING_H)
-# include <string.h>
-#else
-# include <strings.h>
-#endif /* !HAVE_STRING_H */
+#include "rlmbutil.h"
#include "history.h"
#include "histlib.h"
+#include "rlshell.h"
+#include "xmalloc.h"
+
#define HISTORY_WORD_DELIMITERS " \t\n;&()|<>"
#define HISTORY_QUOTE_CHARACTERS "\"'`"
+#define slashify_in_quotes "\\`\"$"
+
+typedef int _hist_search_func_t PARAMS((const char *, int));
+
static char error_pointer;
static char *subst_lhs;
static int subst_lhs_len;
static int subst_rhs_len;
-static char *get_history_word_specifier ();
-static char *history_find_word ();
-
-extern int history_offset;
+static char *get_history_word_specifier PARAMS((char *, char *, int *));
+static int history_tokenize_word PARAMS((const char *, int));
+static char **history_tokenize_internal PARAMS((const char *, int, int *));
+static char *history_substring PARAMS((const char *, int, int));
+static void freewords PARAMS((char **, int));
+static char *history_find_word PARAMS((char *, int));
-extern char *single_quote ();
-static char *quote_breaks ();
-
-extern char *xmalloc (), *xrealloc ();
+static char *quote_breaks PARAMS((char *));
/* Variables exported by this file. */
/* The character that represents the start of a history expansion
The default is 0. */
int history_quotes_inhibit_expansion = 0;
+/* Used to split words by history_tokenize_internal. */
+char *history_word_delimiters = HISTORY_WORD_DELIMITERS;
+
/* If set, this points to a function that is called to verify that a
particular history expansion should be performed. */
-Function *history_inhibit_expansion_function;
+rl_linebuf_func_t *history_inhibit_expansion_function;
/* **************************************************************** */
/* */
line = get_history_event ("!echo:p", &index, 0); */
char *
get_history_event (string, caller_index, delimiting_quote)
- char *string;
+ const char *string;
int *caller_index;
int delimiting_quote;
{
register char c;
HIST_ENTRY *entry;
int which, sign, local_index, substring_okay;
- Function *search_func;
+ _hist_search_func_t *search_func;
char *temp;
/* The event can be specified in a number of ways.
/* Only a closing `?' or a newline delimit a substring search string. */
for (local_index = i; c = string[i]; i++)
- if ((!substring_okay && (whitespace (c) || c == ':' ||
- (history_search_delimiter_chars && member (c, history_search_delimiter_chars)) ||
- string[i] == delimiting_quote)) ||
- string[i] == '\n' ||
- (substring_okay && string[i] == '?'))
- break;
+ {
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ int v;
+ mbstate_t ps;
+
+ memset (&ps, 0, sizeof (mbstate_t));
+ /* These produce warnings because we're passing a const string to a
+ function that takes a non-const string. */
+ _rl_adjust_point ((char *)string, i, &ps);
+ if ((v = _rl_get_char_len ((char *)string + i, &ps)) > 1)
+ {
+ i += v - 1;
+ continue;
+ }
+ }
+
+#endif /* HANDLE_MULTIBYTE */
+ if ((!substring_okay && (whitespace (c) || c == ':' ||
+ (history_search_delimiter_chars && member (c, history_search_delimiter_chars)) ||
+ string[i] == delimiting_quote)) ||
+ string[i] == '\n' ||
+ (substring_okay && string[i] == '?'))
+ break;
+ }
which = i - local_index;
- temp = xmalloc (1 + which);
+ temp = (char *)xmalloc (1 + which);
if (which)
strncpy (temp, string + local_index, which);
temp[which] = '\0';
#define FAIL_SEARCH() \
do { \
- history_offset = history_length; free (temp) ; return (char *)NULL; \
+ history_offset = history_length; xfree (temp) ; return (char *)NULL; \
} while (0)
/* If there is no search string, try to use the previous search string,
{
if (search_string)
{
- free (temp);
+ xfree (temp);
temp = savestring (search_string);
}
else
if (local_index == 0 || substring_okay)
{
entry = current_history ();
+ if (entry == 0)
+ FAIL_SEARCH ();
history_offset = history_length;
/* If this was a substring search, then remember the
search_match = history_find_word (entry->line, local_index);
}
else
- free (temp);
+ xfree (temp);
return (entry->line);
}
/* Extract the contents of STRING as if it is enclosed in single quotes.
SINDEX, when passed in, is the offset of the character immediately
following the opening single quote; on exit, SINDEX is left pointing
- to the closing single quote. */
+ to the closing single quote. FLAGS currently used to allow backslash
+ to escape a single quote (e.g., for bash $'...'). */
static void
-hist_string_extract_single_quoted (string, sindex)
+hist_string_extract_single_quoted (string, sindex, flags)
char *string;
- int *sindex;
+ int *sindex, flags;
{
register int i;
for (i = *sindex; string[i] && string[i] != '\''; i++)
- ;
+ {
+ if ((flags & 1) && string[i] == '\\' && string[i+1])
+ i++;
+ }
*sindex = i;
}
len += 2;
}
- r = ret = xmalloc (len);
+ r = ret = (char *)xmalloc (len);
*r++ = '\'';
for (p = s; p && *p; )
{
char *s;
int start, current, errtype;
{
- char *temp, *emsg;
+ char *temp;
+ const char *emsg;
int ll, elen;
ll = current - start;
emsg = "unrecognized history modifier";
elen = 29;
break;
+ case NO_PREV_SUBST:
+ emsg = "no previous substitution";
+ elen = 24;
+ break;
default:
emsg = "unknown expansion error";
elen = 23;
break;
}
- temp = xmalloc (ll + elen + 3);
+ temp = (char *)xmalloc (ll + elen + 3);
strncpy (temp, s + start, ll);
temp[ll] = ':';
temp[ll + 1] = ' ';
int *iptr, delimiter, is_rhs, *lenptr;
{
register int si, i, j, k;
- char *s = (char *) NULL;
+ char *s;
+#if defined (HANDLE_MULTIBYTE)
+ mbstate_t ps;
+#endif
+ s = (char *)NULL;
i = *iptr;
+#if defined (HANDLE_MULTIBYTE)
+ memset (&ps, 0, sizeof (mbstate_t));
+ _rl_adjust_point (str, i, &ps);
+#endif
+
for (si = i; str[si] && str[si] != delimiter; si++)
- if (str[si] == '\\' && str[si + 1] == delimiter)
- si++;
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ int v;
+ if ((v = _rl_get_char_len (str + si, &ps)) > 1)
+ si += v - 1;
+ else if (str[si] == '\\' && str[si + 1] == delimiter)
+ si++;
+ }
+ else
+#endif /* HANDLE_MULTIBYTE */
+ if (str[si] == '\\' && str[si + 1] == delimiter)
+ si++;
if (si > i || is_rhs)
{
- s = xmalloc (si - i + 1);
+ s = (char *)xmalloc (si - i + 1);
for (j = 0, k = i; k < si; j++, k++)
{
/* Remove a backslash quoting the search string delimiter. */
char *new;
int i, j, new_size;
- new = xmalloc (new_size = subst_rhs_len + subst_lhs_len);
+ new = (char *)xmalloc (new_size = subst_rhs_len + subst_lhs_len);
for (i = j = 0; i < subst_rhs_len; i++)
{
if (subst_rhs[i] == '&')
{
if (j + subst_lhs_len >= new_size)
- new = xrealloc (new, (new_size = new_size * 2 + subst_lhs_len));
+ new = (char *)xrealloc (new, (new_size = new_size * 2 + subst_lhs_len));
strcpy (new + j, subst_lhs);
j += subst_lhs_len;
}
if (subst_rhs[i] == '\\' && subst_rhs[i + 1] == '&')
i++;
if (j >= new_size)
- new = xrealloc (new, new_size *= 2);
+ new = (char *)xrealloc (new, new_size *= 2);
new[j++] = subst_rhs[i];
}
}
new[j] = '\0';
- free (subst_rhs);
+ xfree (subst_rhs);
subst_rhs = new;
subst_rhs_len = j;
}
the returned string. Returns the new index into string in
*END_INDEX_PTR, and the expanded specifier in *RET_STRING. */
static int
-history_expand_internal (string, start, end_index_ptr, ret_string, current_line)
+history_expand_internal (string, start, qc, end_index_ptr, ret_string, current_line)
char *string;
- int start, *end_index_ptr;
+ int start, qc, *end_index_ptr;
char **ret_string;
char *current_line; /* for !# */
{
int i, n, starting_index;
- int substitute_globally, want_quotes, print_only;
+ int substitute_globally, subst_bywords, want_quotes, print_only;
char *event, *temp, *result, *tstr, *t, c, *word_spec;
int result_len;
+#if defined (HANDLE_MULTIBYTE)
+ mbstate_t ps;
- result = xmalloc (result_len = 128);
+ memset (&ps, 0, sizeof (mbstate_t));
+#endif
+
+ result = (char *)xmalloc (result_len = 128);
i = start;
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 (i && (string[i - 1] == '\'' || string[i - 1] == '"'))
- quoted_search_delimiter = string[i - 1];
- event = get_history_event (string, &i, quoted_search_delimiter);
- }
+ event = get_history_event (string, &i, qc);
if (event == 0)
{
*ret_string = hist_error (string, start, i, EVENT_NOT_FOUND);
- free (result);
+ xfree (result);
return (-1);
}
if (word_spec == (char *)&error_pointer)
{
*ret_string = hist_error (string, starting_index, i, BAD_WORD_SPEC);
- free (result);
+ xfree (result);
return (-1);
}
FREE (word_spec);
/* Perhaps there are other modifiers involved. Do what they say. */
- want_quotes = substitute_globally = print_only = 0;
+ want_quotes = substitute_globally = subst_bywords = print_only = 0;
starting_index = i;
while (string[i] == ':')
{
c = string[i + 1];
- if (c == 'g')
+ 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);
- free (result);
- free (temp);
+ xfree (result);
+ xfree (temp);
return -1;
case 'q':
{
tstr++;
t = savestring (tstr);
- free (temp);
+ xfree (temp);
temp = t;
}
break;
if (tstr)
{
t = savestring (tstr);
- free (temp);
+ xfree (temp);
temp = t;
}
break;
case '&':
case 's':
{
- char *new_event, *t;
- int delimiter, failed, si, l_temp;
+ char *new_event;
+ int delimiter, failed, si, l_temp, ws, we;
if (c == 's')
{
if (i + 2 < (int)strlen (string))
- delimiter = string[i + 2];
+ {
+#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 */
}
}
- /* If there is no lhs, the substitution can't succeed. */
- if (subst_lhs_len == 0)
- {
- *ret_string = hist_error (string, starting_index, i, SUBST_FAILED);
- free (result);
- free (temp);
- return -1;
- }
-
FREE (subst_rhs);
subst_rhs = get_subst_pattern (string, &i, delimiter, 1, &subst_rhs_len);
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);
- free (result);
- free (temp);
+ xfree (result);
+ xfree (temp);
return (-1);
}
/* Find the first occurrence of THIS in TEMP. */
- si = 0;
+ /* 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++)
- if (STREQN (temp+si, subst_lhs, subst_lhs_len))
- {
- int len = subst_rhs_len - subst_lhs_len + l_temp;
- new_event = 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';
- free (temp);
- temp = new_event;
-
- failed = 0;
-
- if (substitute_globally)
- {
- si += subst_rhs_len;
- l_temp = strlen (temp);
- substitute_globally++;
- continue;
- }
- else
- break;
- }
+ {
+ /* 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)
{
continue; /* don't want to increment i */
*ret_string = hist_error (string, starting_index, i, SUBST_FAILED);
- free (result);
- free (temp);
+ xfree (result);
+ xfree (temp);
return (-1);
}
}
i += 2;
}
- /* Done with modfiers. */
+ /* Done with modifiers. */
/* Believe it or not, we have to back the pointer up by one. */
--i;
char *x;
if (want_quotes == 'q')
- x = single_quote (temp);
+ x = sh_single_quote (temp);
else if (want_quotes == 'x')
x = quote_breaks (temp);
else
x = savestring (temp);
- free (temp);
+ xfree (temp);
temp = x;
}
n = strlen (temp);
if (n >= result_len)
- result = xrealloc (result, n + 2);
+ result = (char *)xrealloc (result, n + 2);
strcpy (result, temp);
- free (temp);
+ xfree (temp);
*end_index_ptr = i;
*ret_string = result;
{ \
while (j >= result_len) \
result_len += 128; \
- result = xrealloc (result, result_len); \
+ result = (char *)xrealloc (result, result_len); \
} \
strcpy (result + j - sl, s); \
} \
do \
{ \
if (j >= result_len - 1) \
- result = xrealloc (result, result_len += 64); \
+ result = (char *)xrealloc (result, result_len += 64); \
result[j++] = c; \
result[j] = '\0'; \
} \
char **output;
{
register int j;
- int i, r, l, passc, cc, modified, eindex, only_printing;
+ int i, r, l, passc, cc, modified, eindex, only_printing, dquote, squote, 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)
}
/* Prepare the buffer for printing error messages. */
- result = xmalloc (result_len = 256);
+ result = (char *)xmalloc (result_len = 256);
result[0] = '\0';
only_printing = modified = 0;
that is the substitution that we do. */
if (hstring[0] == history_subst_char)
{
- string = xmalloc (l + 5);
+ string = (char *)xmalloc (l + 5);
string[0] = string[1] = history_expansion_char;
string[2] = ':';
}
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 = 0; string[i]; i++)
+ for (i = dquote = squote = 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 that the beginning
+ /* 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)))
+ (i == 0 || member (string[i - 1], history_word_delimiters)))
{
while (string[i])
i++;
}
else if (string[i] == history_expansion_char)
{
- if (!cc || member (cc, history_no_expand_chars))
+ if (cc == 0 || member (cc, history_no_expand_chars))
+ continue;
+ /* DQUOTE won't be set unless history_quotes_inhibit_expansion
+ is set. The idea here is to treat double-quoted strings the
+ same as the word outside double quotes; in effect making the
+ double quote part of history_no_expand_chars when DQUOTE is
+ set. */
+ else if (dquote && cc == '"')
continue;
/* If the calling application has set
history_inhibit_expansion_function to a function that checks
else
break;
}
- /* XXX - at some point, might want to extend this to handle
- double quotes as well. */
- else if (history_quotes_inhibit_expansion && string[i] == '\'')
+ /* 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);
+ hist_string_extract_single_quoted (string, &i, flag);
}
else if (history_quotes_inhibit_expansion && string[i] == '\\')
{
if (cc == '\'' || cc == history_expansion_char)
i++;
}
+
}
if (string[i] != history_expansion_char)
{
- free (result);
+ xfree (result);
*output = savestring (string);
return (0);
}
}
/* Extract and perform the substitution. */
- for (passc = i = j = 0; i < l; i++)
+ for (passc = dquote = squote = i = j = 0; i < l; i++)
{
- int tchar = string[i];
+ int qc, tchar = string[i];
if (passc)
{
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)
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 (history_quotes_inhibit_expansion)
+ inhibit history expansion, otherwise they are treated like
+ double quotes. */
+ if (squote)
+ {
+ squote = 0;
+ ADD_CHAR (tchar);
+ }
+ else 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);
+ hist_string_extract_single_quoted (string, &i, flag);
slen = i - quote + 2;
- temp = xmalloc (slen);
+ temp = (char *)xmalloc (slen);
strncpy (temp, string + quote, slen);
temp[slen - 1] = '\0';
ADD_STRING (temp);
- free (temp);
+ xfree (temp);
+ }
+ else if (dquote == 0 && squote == 0 && history_quotes_inhibit_expansion == 0)
+ {
+ squote = 1;
+ ADD_CHAR (string[i]);
}
else
ADD_CHAR (string[i]);
}
case -2: /* history_comment_char */
- if (i == 0 || member (string[i - 1], HISTORY_WORD_DELIMITERS))
+ if (i == 0 || member (string[i - 1], history_word_delimiters))
{
- temp = xmalloc (l - i + 1);
+ temp = (char *)xmalloc (l - i + 1);
strcpy (temp, string + i);
ADD_STRING (temp);
- free (temp);
+ xfree (temp);
i = l;
}
else
/* 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 (member (cc, history_no_expand_chars))
+ if (cc == 0 || member (cc, history_no_expand_chars) ||
+ (dquote && cc == '"') ||
+ (history_inhibit_expansion_function && (*history_inhibit_expansion_function) (string, i)))
{
ADD_CHAR (string[i]);
break;
{
if (result)
{
- temp = xmalloc (1 + strlen (result));
+ temp = (char *)xmalloc (1 + strlen (result));
strcpy (temp, result);
ADD_STRING (temp);
- free (temp);
+ xfree (temp);
}
i++;
break;
}
#endif
-
- r = history_expand_internal (string, i, &eindex, &temp, result);
+ qc = squote ? '\'' : (dquote ? '"' : 0);
+ r = history_expand_internal (string, i, qc, &eindex, &temp, result);
if (r < 0)
{
*output = temp;
- free (result);
+ xfree (result);
if (string != hstring)
- free (string);
+ xfree (string);
return -1;
}
else
modified++;
if (*temp)
ADD_STRING (temp);
- free (temp);
+ xfree (temp);
}
only_printing = r == 1;
i = eindex;
*output = result;
if (string != hstring)
- free (string);
+ xfree (string);
if (only_printing)
{
+#if 0
add_history (result);
+#endif
return (2);
}
if (spec[i] == '-')
first = 0;
else if (spec[i] == '^')
- first = 1;
+ {
+ first = 1;
+ i++;
+ }
else if (_rl_digit_p (spec[i]) && expecting_word_spec)
{
for (first = 0; _rl_digit_p (spec[i]); i++)
i++;
last = '$';
}
- else if (!spec[i] || spec[i] == ':') /* could be modifier separator */
+#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 `$' */
}
char *
history_arg_extract (first, last, string)
int first, last;
- char *string;
+ const char *string;
{
register int i, len;
char *result;
{
for (size = 0, i = first; i < last; i++)
size += strlen (list[i]) + 1;
- result = xmalloc (size + 1);
+ result = (char *)xmalloc (size + 1);
result[0] = '\0';
for (i = first, offset = 0; i < last; i++)
}
for (i = 0; i < len; i++)
- free (list[i]);
- free (list);
+ xfree (list[i]);
+ xfree (list);
return (result);
}
-#define slashify_in_quotes "\\`\"$"
+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
*INDP. */
static char **
history_tokenize_internal (string, wind, indp)
- char *string;
+ const char *string;
int wind, *indp;
{
char **result;
register int i, start, result_index, size;
- int len, delimiter;
+
+ /* 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]; )
{
- delimiter = 0;
-
/* Skip leading whitespace. */
for (; string[i] && whitespace (string[i]); i++)
;
return (result);
start = i;
-
- if (member (string[i], "()\n"))
- {
- i++;
- goto got_token;
- }
-
- if (member (string[i], "<>;&|$"))
- {
- int peek = string[i + 1];
-
- if (peek == string[i] && peek != '$')
- {
- if (peek == '<' && string[i + 2] == '-')
- i++;
- i += 2;
- goto got_token;
- }
- else
- {
- if ((peek == '&' && (string[i] == '>' || string[i] == '<')) ||
- ((peek == '>') && (string[i] == '&')) ||
- ((peek == '(') && (string[i] == '$')))
- {
- i += 2;
- goto got_token;
- }
- }
- if (string[i] != '$')
- {
- i++;
- goto got_token;
- }
- }
- /* Get word from string + i; */
+ i = history_tokenize_word (string, start);
- if (member (string[i], HISTORY_QUOTE_CHARACTERS))
- delimiter = string[i++];
-
- for (; string[i]; i++)
+ /* 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)
{
- if (string[i] == '\\' && string[i + 1] == '\n')
- {
- i++;
- continue;
- }
-
- if (string[i] == '\\' && delimiter != '\'' &&
- (delimiter != '"' || member (string[i], slashify_in_quotes)))
- {
- i++;
- continue;
- }
-
- if (delimiter && string[i] == delimiter)
- {
- delimiter = 0;
- continue;
- }
-
- if (!delimiter && (member (string[i], HISTORY_WORD_DELIMITERS)))
- break;
-
- if (!delimiter && member (string[i], HISTORY_QUOTE_CHARACTERS))
- delimiter = string[i];
+ i++;
+ while (string[i] && member (string[i], history_word_delimiters))
+ i++;
}
- got_token:
-
/* 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;
- len = i - start;
if (result_index + 2 >= size)
result = (char **)xrealloc (result, ((size += 10) * sizeof (char *)));
- result[result_index] = xmalloc (1 + len);
- strncpy (result[result_index], string + start, len);
- result[result_index][len] = '\0';
- result[++result_index] = (char *)NULL;
+
+ result[result_index++] = history_substring (string, start, i);
+ result[result_index] = (char *)NULL;
}
return (result);
parsed out of STRING. */
char **
history_tokenize (string)
- char *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. */
int i, wind;
words = history_tokenize_internal (line, ind, &wind);
- if (wind == -1)
- return ((char *)NULL);
+ if (wind == -1 || words == 0)
+ {
+ if (words)
+ freewords (words, 0);
+ FREE (words);
+ return ((char *)NULL);
+ }
s = words[wind];
for (i = 0; i < wind; i++)
- free (words[i]);
- for (i = wind + 1; words[i]; i++)
- free (words[i]);
- free (words);
+ xfree (words[i]);
+ freewords (words, wind + 1);
+ xfree (words);
return s;
}
projects / platform / upstream / bash.git / blobdiff