Function readUIntText

base/base/JSON.cpp:20–53

Read unsigned integer in a simple form from a non-0-terminated string.

/// Read unsigned integer in a simple form from a non-0-terminated string.
static UInt64 readUIntText(const char * buf, const char * end)
{
    UInt64 x = 0;

    if (buf == end)
        throw JSONException("JSON: cannot parse unsigned integer: unexpected end of data.");

    while (buf != end)
    {
        switch (*buf)
        {
            case '+':
                break;
            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
                x *= 10;
                x += *buf - '0';
                break;
            default:
                return x;
        }
        ++buf;
    }

    return x;
}


/// Read signed integer in a simple form from a non-0-terminated string.