Function Win32Recode

ThirdParty/libproj/vtklibproj/src/filemanager.cpp:547–577

// ---------------------------------------------------------------------------

static std::string Win32Recode(const char *src, unsigned src_code_page,
                               unsigned dst_code_page) {
    // Convert from source code page to Unicode.

    // Compute the length in wide characters.
    int wlen = MultiByteToWideChar(src_code_page, MB_ERR_INVALID_CHARS, src, -1,
                                   nullptr, 0);
    if (wlen == 0 && GetLastError() == ERROR_NO_UNICODE_TRANSLATION) {
        return std::string();
    }

    // Do the actual conversion.
    std::wstring wbuf;
    wbuf.resize(wlen);
    MultiByteToWideChar(src_code_page, 0, src, -1, &wbuf[0], wlen);

    // Convert from Unicode to destination code page.

    // Compute the length in chars.
    int len = WideCharToMultiByte(dst_code_page, 0, &wbuf[0], -1, nullptr, 0,
                                  nullptr, nullptr);

    // Do the actual conversion.
    std::string out;
    out.resize(len);
    WideCharToMultiByte(dst_code_page, 0, &wbuf[0], -1, &out[0], len, nullptr,
                        nullptr);
    out.resize(strlen(out.c_str()));

    return out;
}

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