/*

  * This file is part of FFmpeg.

  *

  * FFmpeg 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.
  *

  * FFmpeg 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 FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "config.h"
 #include "internal.h"
 #include "mem.h"
 #include <stdarg.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #if HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 #if HAVE_IO_H
 #include <io.h>
 #endif
 
 #if defined(_WIN32) && !defined(__MINGW32CE__)
 #undef open
 #undef lseek
 #undef stat
 #undef fstat
 #include <windows.h>
 #include <share.h>
 #include <errno.h>
 
 static int win32_open(const char *filename_utf8, int oflag, int pmode)
 {
     int fd;
     int num_chars;
     wchar_t *filename_w;
 
     /* convert UTF-8 to wide chars */
     num_chars = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, filename_utf8, -1, NULL, 0);
     if (num_chars <= 0)
         goto fallback;
     filename_w = av_mallocz(sizeof(wchar_t) * num_chars);
     if (!filename_w) {
         errno = ENOMEM;
         return -1;
     }
     MultiByteToWideChar(CP_UTF8, 0, filename_utf8, -1, filename_w, num_chars);
 
     fd = _wsopen(filename_w, oflag, SH_DENYNO, pmode);
     av_freep(&filename_w);
 
     if (fd != -1 || (oflag & O_CREAT))
         return fd;
 
 fallback:

     /* filename may be in CP_ACP */

     return _sopen(filename_utf8, oflag, SH_DENYNO, pmode);
 }
 #define open win32_open
 #endif
 
 int avpriv_open(const char *filename, int flags, ...)
 {
     int fd;
     unsigned int mode = 0;
     va_list ap;
 
     va_start(ap, flags);
     if (flags & O_CREAT)
         mode = va_arg(ap, unsigned int);
     va_end(ap);
 
 #ifdef O_CLOEXEC
     flags |= O_CLOEXEC;
 #endif
 
     fd = open(filename, flags, mode);
 #if HAVE_FCNTL

     if (fd != -1) {
         if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
             av_log(NULL, AV_LOG_DEBUG, "Failed to set close on exec\n");
     }

 #endif
 
     return fd;
 }

 
 FILE *av_fopen_utf8(const char *path, const char *mode)
 {
     int fd;
     int access;
     const char *m = mode;
 
     switch (*m++) {
     case 'r': access = O_RDONLY; break;
     case 'w': access = O_CREAT|O_WRONLY|O_TRUNC; break;
     case 'a': access = O_CREAT|O_WRONLY|O_APPEND; break;
     default :
         errno = EINVAL;
         return NULL;
     }
     while (*m) {
         if (*m == '+') {
             access &= ~(O_RDONLY | O_WRONLY);
             access |= O_RDWR;
         } else if (*m == 'b') {
 #ifdef O_BINARY
             access |= O_BINARY;
 #endif
         } else if (*m) {
             errno = EINVAL;
             return NULL;
         }
         m++;
     }
     fd = avpriv_open(path, access, 0666);
     if (fd == -1)
         return NULL;
     return fdopen(fd, mode);
 }