/* Recode strings between character sets, using iconv.
Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public License as
- published by the Free Software Foundation; either version 2.1, or (at
- your option) any later version.
+ This program 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.
This program 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 Lesser General Public License for more details.
+ GNU General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License along
+ You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#if HAVE_ICONV
/* Get iconv etc. */
# include <iconv.h>
-/* Get MB_LEN_MAX. */
+/* Get MB_LEN_MAX, CHAR_BIT. */
# include <limits.h>
#endif
+#ifndef SIZE_MAX
+# define SIZE_MAX ((size_t) -1)
+#endif
+
/* Convert a zero-terminated string STR from the FROM_CODSET code set
to the TO_CODESET code set. The returned string is allocated using
malloc, and must be dellocated by the caller using free. On
char *p = (char *) str;
size_t inbytes_remaining = strlen (p);
/* Guess the maximum length the output string can have. */
- size_t outbuf_size = (inbytes_remaining + 1) * MB_LEN_MAX;
- size_t outbytes_remaining = outbuf_size - 1; /* -1 for NUL */
+ size_t outbuf_size = inbytes_remaining + 1;
+ size_t outbytes_remaining;
size_t err;
int have_error = 0;
- if (1 < MB_LEN_MAX && SIZE_MAX / MB_LEN_MAX <= inbytes_remaining)
- {
- errno = ENOMEM;
- return NULL;
- }
+ /* Use a worst-case output size guess, so long as that wouldn't be
+ too large for comfort. It's OK if the guess is wrong so long as
+ it's nonzero. */
+ size_t approx_sqrt_SIZE_MAX = SIZE_MAX >> (sizeof (size_t) * CHAR_BIT / 2);
+ if (outbuf_size <= approx_sqrt_SIZE_MAX / MB_LEN_MAX)
+ outbuf_size *= MB_LEN_MAX;
+ outbytes_remaining = outbuf_size - 1;
#endif
if (strcmp (to_codeset, from_codeset) == 0)