/* stringlib.c - Miscellaneous string functions. */
-/* Copyright (C) 1996-2002 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2009 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
- Bash is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 2, or (at your option) any later
- version.
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bash 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.
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with Bash; see the file COPYING. If not, write to the Free Software
- Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
#include "config.h"
not including END. */
char *
substring (string, start, end)
- char *string;
+ const char *string;
int start, end;
{
register int len;
len = end - start;
result = (char *)xmalloc (len + 1);
- strncpy (result, string + start, len);
+ memcpy (result, string + start, len);
result[len] = '\0';
return (result);
}
char *string, *pat, *rep;
int global;
{
- int patlen, replen, templen, tempsize, repl, i;
+ size_t patlen, replen, templen, tempsize, i;
+ int repl;
char *temp, *r;
patlen = strlen (pat);
if (replen)
RESIZE_MALLOCED_BUFFER (temp, templen, replen, tempsize, (replen * 2));
- for (r = rep; *r; )
+ for (r = rep; *r; ) /* can rep == "" */
temp[templen++] = *r++;
i += patlen ? patlen : 1; /* avoid infinite recursion */
temp[templen++] = string[i++];
}
}
- temp[templen] = 0;
+ if (temp)
+ temp[templen] = 0;
+ else
+ temp = savestring (string);
return (temp);
}
/* Replace all instances of C in STRING with TEXT. TEXT may be empty or
- NULL. If DO_GLOB is non-zero, we quote the replacement text for
- globbing. Backslash may be used to quote C. */
+ NULL. If (FLAGS & 1) is non-zero, we quote the replacement text for
+ globbing. Backslash may be used to quote C. If (FLAGS & 2) we allow
+ backslash to escape backslash as well. */
char *
-strcreplace (string, c, text, do_glob)
+strcreplace (string, c, text, flags)
char *string;
int c;
- char *text;
- int do_glob;
+ const char *text;
+ int flags;
{
char *ret, *p, *r, *t;
- int len, rlen, ind, tlen;
+ size_t len, rlen, ind, tlen;
+ int do_glob, escape_backslash;
+
+ do_glob = flags & 1;
+ escape_backslash = flags & 2;
len = STRLEN (text);
rlen = len + strlen (string) + 2;
if (*p == '\\' && p[1] == c)
p++;
+ else if (escape_backslash && *p == '\\' && p[1] == '\\')
+ p++;
ind = r - ret;
RESIZE_MALLOCED_BUFFER (ret, ind, 2, rlen, rlen);