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4cdc14aa95
Since every DLL can use an individual CRT on Windows, having
an exported function that opens a FILE* won't work if that
FILE* is going to be used from a different DLL (or from user
application code).
Internally within the libraries, the issue can be worked around
by duplicating the function in all libraries (this already happened
implicitly because the function resided in file_open.c) and renaming
the function to ff_fopen_utf8 (so that it doesn't end up exported from
the DLLs) and duplicating it in all libraries that use it.
This makes the avpriv_fopen_utf8 / ff_fopen_utf8 function work in
the exact same way as the existing avpriv_open / ff_open, with the
same setup as introduced in e743e7ae6e.
That mechanism doesn't work for external users, thus deprecate the
existing function.
Signed-off-by: Martin Storsjö <martin@martin.st>
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef FFTOOLS_FOPEN_UTF8_H
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#define FFTOOLS_FOPEN_UTF8_H
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#include <stdio.h>
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/* The fopen_utf8 function here is essentially equivalent to avpriv_fopen_utf8,
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* except that it doesn't set O_CLOEXEC, and that it isn't exported
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* from a different library. (On Windows, each DLL might use a different
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* CRT, and FILE* handles can't be shared across them.) */
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#ifdef _WIN32
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#include "libavutil/wchar_filename.h"
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static inline FILE *fopen_utf8(const char *path_utf8, const char *mode)
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{
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wchar_t *path_w, *mode_w;
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FILE *f;
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/* convert UTF-8 to wide chars */
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if (utf8towchar(path_utf8, &path_w)) /* This sets errno on error. */
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return NULL;
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if (!path_w)
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goto fallback;
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if (utf8towchar(mode, &mode_w))
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return NULL;
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if (!mode_w) {
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/* If failing to interpret the mode string as utf8, it is an invalid
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* parameter. */
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av_freep(&path_w);
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errno = EINVAL;
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return NULL;
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}
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f = _wfopen(path_w, mode_w);
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av_freep(&path_w);
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av_freep(&mode_w);
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return f;
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fallback:
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/* path may be in CP_ACP */
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return fopen(path_utf8, mode);
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}
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#else
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static inline FILE *fopen_utf8(const char *path, const char *mode)
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{
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return fopen(path, mode);
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}
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#endif
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#endif /* FFTOOLS_FOPEN_UTF8_H */
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