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/* Compare two wide strings using the current locale.
Copyright (C) 2011 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2011.
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 3 of the License, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
int
wcscoll (const wchar_t *s1, const wchar_t *s2)
{
char mbbuf1[1024];
char mbbuf2[1024];
char *mbs1;
char *mbs2;
{
int saved_errno = errno;
/* Convert s1 to a multibyte string, trying to avoid malloc(). */
{
size_t ret;
ret = wcstombs (mbbuf1, s1, sizeof (mbbuf1));
if (ret == (size_t)-1)
goto failed1;
if (ret < sizeof (mbbuf1))
mbs1 = mbbuf1;
else
{
size_t need = wcstombs (NULL, s1, 0);
if (need == (size_t)-1)
goto failed1;
mbs1 = (char *) malloc (need + 1);
if (mbs1 == NULL)
goto out_of_memory1;
ret = wcstombs (mbs1, s1, need + 1);
if (ret != need)
abort ();
}
}
/* Convert s2 to a multibyte string, trying to avoid malloc(). */
{
size_t ret;
ret = wcstombs (mbbuf2, s2, sizeof (mbbuf2));
if (ret == (size_t)-1)
goto failed2;
if (ret < sizeof (mbbuf2))
mbs2 = mbbuf2;
else
{
size_t need = wcstombs (NULL, s2, 0);
if (need == (size_t)-1)
goto failed2;
mbs2 = (char *) malloc (need + 1);
if (mbs2 == NULL)
goto out_of_memory2;
ret = wcstombs (mbs2, s2, need + 1);
if (ret != need)
abort ();
}
}
/* No error so far. */
errno = saved_errno;
}
/* Compare the two multibyte strings. */
{
int result = strcoll (mbs1, mbs2);
if (mbs1 != mbbuf1)
{
int saved_errno = errno;
free (mbs1);
errno = saved_errno;
}
if (mbs2 != mbbuf2)
{
int saved_errno = errno;
free (mbs2);
errno = saved_errno;
}
return result;
}
out_of_memory2:
if (mbs1 != mbbuf1)
free (mbs1);
out_of_memory1:
errno = ENOMEM;
return 0;
failed2:
if (mbs1 != mbbuf1)
free (mbs1);
failed1:
errno = EILSEQ;
return 0;
}
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