getenv_utf8.h

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/*
 * 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
 */
 
#ifndef AVUTIL_GETENV_UTF8_H
#define AVUTIL_GETENV_UTF8_H
 
#include <stdlib.h>
 
#include "config.h"
#include "mem.h"
 
#if HAVE_GETENV && defined(_WIN32)
 
#include "libavutil/wchar_filename.h"
 
static inline char *getenv_utf8(const char *varname)
{
    wchar_t *varname_w, *var_w;
    char *var;
 
    if (utf8towchar(varname, &varname_w))
        return NULL;
    if (!varname_w)
        return NULL;
 
    var_w = _wgetenv(varname_w);
    av_free(varname_w);
 
    if (!var_w)
        return NULL;
    if (wchartoutf8(var_w, &var))
        return NULL;
 
    return var;
 
    // No CP_ACP fallback compared to other *_utf8() functions:
    // non UTF-8 strings must not be returned.
}
 
static inline void freeenv_utf8(char *var)
{
    av_free(var);
}
 
static inline char *getenv_dup(const char *varname)
{
    return getenv_utf8(varname);
}
 
#else
 
static inline char *getenv_utf8(const char *varname)
{
    return getenv(varname);
}
 
static inline void freeenv_utf8(char *var)
{
}
 
static inline char *getenv_dup(const char *varname)
{
    char *var = getenv(varname);
    if (!var)
        return NULL;
    return av_strdup(var);
}
 
#endif // HAVE_GETENV && defined(_WIN32)
 
#endif // AVUTIL_GETENV_UTF8_H