fftools/fopen_utf8.h

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef FFTOOLS_FOPEN_UTF8_H
  20 #define FFTOOLS_FOPEN_UTF8_H
  21
  22 #include <stdio.h>
  23
  24 /* The fopen_utf8 function here is essentially equivalent to avpriv_fopen_utf8,
  25  * except that it doesn't set O_CLOEXEC, and that it isn't exported
  26  * from a different library. (On Windows, each DLL might use a different
  27  * CRT, and FILE* handles can't be shared across them.) */
  28
  29 #ifdef _WIN32
  30 #include "libavutil/mem.h"
  31 #include "libavutil/wchar_filename.h"
  32
  33 static inline FILE *fopen_utf8(const char *path_utf8, const char *mode)
  34 {
  35     wchar_t *path_w, *mode_w;
  36     FILE *f;
  37
  38     /* convert UTF-8 to wide chars */
  39     if (get_extended_win32_path(path_utf8, &path_w)) /* This sets errno on error. */
  40         return NULL;
  41     if (!path_w)
  42         goto fallback;
  43
  44     if (utf8towchar(mode, &mode_w))
  45         return NULL;
  46     if (!mode_w) {
  47         /* If failing to interpret the mode string as utf8, it is an invalid
  48          * parameter. */
  49         av_freep(&path_w);
  50         errno = EINVAL;
  51         return NULL;
  52     }
  53
  54     f = _wfopen(path_w, mode_w);
  55     av_freep(&path_w);
  56     av_freep(&mode_w);
  57
  58     return f;
  59 fallback:
  60     /* path may be in CP_ACP */
  61     return fopen(path_utf8, mode);
  62 }
  63
  64 #else
  65
  66 static inline FILE *fopen_utf8(const char *path, const char *mode)
  67 {
  68     return fopen(path, mode);
  69 }
  70 #endif
  71
  72 #endif /* FFTOOLS_FOPEN_UTF8_H */