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    #endif
#endif
    if (*ppFile == NULL) {
        drflac_result result = drflac_result_from_errno(errno);
        if (result == DRFLAC_SUCCESS) {
            result = DRFLAC_ERROR;   /* Just a safety check to make sure we never ever return success when pFile == NULL. */
        }

        return result;
    }
#endif

    return DRFLAC_SUCCESS;
}

/*
_wfopen() isn't always available in all compilation environments.

    * Windows only.
    * MSVC seems to support it universally as far back as VC6 from what I can tell (haven't checked further back).
    * MinGW-64 (both 32- and 64-bit) seems to support it.
    * MinGW wraps it in !defined(__STRICT_ANSI__).

This can be reviewed as compatibility issues arise. The preference is to use _wfopen_s() and _wfopen() as opposed to the wcsrtombs()
fallback, so if you notice your compiler not detecting this properly I'm happy to look at adding support.
*/
#if defined(_WIN32)
    #if defined(_MSC_VER) || defined(__MINGW64__) || !defined(__STRICT_ANSI__)
        #define DRFLAC_HAS_WFOPEN
    #endif
#endif

static drflac_result drflac_wfopen(FILE** ppFile, const wchar_t* pFilePath, const wchar_t* pOpenMode, const drflac_allocation_callbacks* pAllocationCallbacks)
{
    if (ppFile != NULL) {
        *ppFile = NULL;  /* Safety. */
    }

    if (pFilePath == NULL || pOpenMode == NULL || ppFile == NULL) {
        return DRFLAC_INVALID_ARGS;
    }

#if defined(DRFLAC_HAS_WFOPEN)
    {
        /* Use _wfopen() on Windows. */
    #if defined(_MSC_VER) && _MSC_VER >= 1400
        errno_t err = _wfopen_s(ppFile, pFilePath, pOpenMode);
        if (err != 0) {
            return drflac_result_from_errno(err);
        }
    #else
        *ppFile = _wfopen(pFilePath, pOpenMode);
        if (*ppFile == NULL) {
            return drflac_result_from_errno(errno);
        }
    #endif
        (void)pAllocationCallbacks;
    }
#else
    /*
    Use fopen() on anything other than Windows. Requires a conversion. This is annoying because fopen() is locale specific. The only real way I can
    think of to do this is with wcsrtombs(). Note that wcstombs() is apparently not thread-safe because it uses a static global mbstate_t object for
    maintaining state. I've checked this with -std=c89 and it works, but if somebody get's a compiler error I'll look into improving compatibility.
    */
    {
        mbstate_t mbs;
        size_t lenMB;
        const wchar_t* pFilePathTemp = pFilePath;
        char* pFilePathMB = NULL;
        char pOpenModeMB[32] = {0};

        /* Get the length first. */
        DRFLAC_ZERO_OBJECT(&mbs);
        lenMB = wcsrtombs(NULL, &pFilePathTemp, 0, &mbs);
        if (lenMB == (size_t)-1) {
            return drflac_result_from_errno(errno);
        }

        pFilePathMB = (char*)drflac__malloc_from_callbacks(lenMB + 1, pAllocationCallbacks);
        if (pFilePathMB == NULL) {
            return DRFLAC_OUT_OF_MEMORY;
        }

        pFilePathTemp = pFilePath;
        DRFLAC_ZERO_OBJECT(&mbs);
        wcsrtombs(pFilePathMB, &pFilePathTemp, lenMB + 1, &mbs);

        /* The open mode should always consist of ASCII characters so we should be able to do a trivial conversion. */
        {
            size_t i = 0;
            for (;;) {
                if (pOpenMode[i] == 0) {
                    pOpenModeMB[i] = '\0';
                    break;
                }

                pOpenModeMB[i] = (char)pOpenMode[i];
                i += 1;
            }
        }

        *ppFile = fopen(pFilePathMB, pOpenModeMB);

        drflac__free_from_callbacks(pFilePathMB, pAllocationCallbacks);
    }

    if (*ppFile == NULL) {
        return DRFLAC_ERROR;
    }
#endif

    return DRFLAC_SUCCESS;
}

static size_t drflac__on_read_stdio(void* pUserData, void* bufferOut, size_t bytesToRead)
{
    return fread(bufferOut, 1, bytesToRead, (FILE*)pUserData);
}

static drflac_bool32 drflac__on_seek_stdio(void* pUserData, int offset, drflac_seek_origin origin)
{