Function GetGuid

util/generic/guid.cpp:90–128

}

bool GetGuid(const TStringBuf s, TGUID& result) {
    size_t partId = 0;
    ui64 partValue = 0;
    bool isEmptyPart = true;

    for (size_t i = 0; i != s.size(); ++i) {
        const char c = s[i];

        if (c == '-') {
            if (isEmptyPart || partId == 3) { // x-y--z, -x-y-z or x-y-z-m-...
                return false;
            }
            result.dw[partId] = static_cast<ui32>(partValue);
            ++partId;
            partValue = 0;
            isEmptyPart = true;
            continue;
        }

        ui32 digit = 0;
        if (!GetDigit(c, digit)) {
            return false;
        }

        partValue = partValue * 16 + digit;
        isEmptyPart = false;

        // overflow check
        if (partValue > Max<ui32>()) {
            return false;
        }
    }

    if (partId != 3 || isEmptyPart) { // x-y or x-y-z-
        return false;
    }
    result.dw[partId] = static_cast<ui32>(partValue);
    return true;
}

// Parses GUID from s and checks that it's valid.
// In case of error returns TGUID().