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/*****************************************************************************
* realpath.c: POSIX realpath replacement
*****************************************************************************
* Copyright © 2016 VLC authors and VideoLAN
*
* 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 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <errno.h>
#ifdef _WIN32
#include <windows.h>
#endif
char *realpath(const char * restrict relpath, char * restrict resolved_path)
{
if (relpath == NULL)
{
errno = EINVAL;
return NULL;
}
#ifdef _WIN32
int len = MultiByteToWideChar( CP_UTF8, 0, relpath, -1, NULL, 0 );
if (len == 0)
return NULL;
wchar_t *wrelpath = malloc(len * sizeof (wchar_t));
if (wrelpath == NULL)
return NULL;
MultiByteToWideChar( CP_UTF8, 0, relpath, -1, wrelpath, len );
wchar_t *wfullpath = _wfullpath( NULL, wrelpath, _MAX_PATH );
free(wrelpath);
if (wfullpath != NULL)
{
size_t len = WideCharToMultiByte( CP_UTF8, 0, wfullpath, -1, NULL, 0, NULL, NULL );
if (len != 0)
{
if (resolved_path != NULL)
len = len >= _MAX_PATH ? _MAX_PATH : len;
else
resolved_path = (char *)malloc(len);
if (resolved_path != NULL)
WideCharToMultiByte( CP_UTF8, 0, wfullpath, -1, resolved_path, len, NULL, NULL );
free(wfullpath);
return resolved_path;
}
free(wfullpath);
}
#else
(void)resolved_path;
#endif
errno = EACCES;
return NULL;
}
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