Method string SystemErrorCodeToString

src/butil/logging.cc:1500–1513

#if defined(OS_WIN)
BUTIL_EXPORT std::string SystemErrorCodeToString(SystemErrorCode error_code) {
    const int error_message_buffer_size = 256;
    char msgbuf[error_message_buffer_size];
    DWORD flags = FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS;
    DWORD len = FormatMessageA(flags, NULL, error_code, 0, msgbuf,
                               arraysize(msgbuf), NULL);
    if (len) {
        // Messages returned by system end with line breaks.
        return butil::CollapseWhitespaceASCII(msgbuf, true) +
            butil::StringPrintf(" (0x%X)", error_code);
    }
    return butil::StringPrintf("Error (0x%X) while retrieving error. (0x%X)",
                              GetLastError(), error_code);
}
#elif defined(OS_POSIX)
BUTIL_EXPORT std::string SystemErrorCodeToString(SystemErrorCode error_code) {
    return berror(error_code);