gistfile1.c

template<typename TFloat>
bool _Field::to_float(TFloat* dest) const {
    /* */
    if (length == 0) {
        return false;
    }

    
    int offset=0;
    int sign = 1;
    int int_part = 0;
    TFloat dec_part = 0.0;
    TFloat res = 0.0;
    TFloat dec = 1.0;

    pychar* cur = s;

    if (*cur == '+') {
        cur++; 
        offset++;

    }
    else if (*cur == '-') {
        sign = -1;
        cur++;
        offset++;
    }
    for (; offset < length;) {
        int_part *= 10;
        int digit = (*cur) - '0';
        if ((digit < 0) || (digit > 9)) {
            if ((*cur) == '.') {
                offset++;
                cur++;
                break;
            }
            else {
                return false;    
            }    
        }
        int_part += digit;
        offset++;
        cur++;
    }
    
    for (; offset < length;) {
        int digit = (*cur) - '0';
        if ((digit < 0) || (digit > 9)) {
            return false;
        }
        dec /= 10.;
        dec_part += dec * digit;
        cur++;
        offset++;
    }
    res = int_part + dec_part;
    if (sign == 1) {
        *dest = res;
    }
    else {
        *dest = -res;
    }
    return true;
}