public override void ToBigInt(string Str)
{
BigInt ResultBigInt = new BigInt(this.Size, 0);
string HString = "0123456789ABCDEF";
string StrUpper = Str.ToUpper();
if (IsNumeric(StrUpper))
{
if (StrUpper.StartsWith("+") || StrUpper.StartsWith("-"))
{
StrUpper = StrUpper.Substring(1, StrUpper.Length - 1);
}
for (int i = 0; i < StrUpper.Length; i++)
{
char cellVal = StrUpper[i];
int n = HString.IndexOf(cellVal);
if (n == -1)
{
throw (new ArgumentException("Invalid string in constructor."));
}
else
{
ResultBigInt = ResultBigInt.Mul10() + (uint)n;
}
}
ResultBigInt.Reduce();
}
else if (StrUpper.Contains('O'))
{
int xPos = StrUpper.IndexOf("O");
if (xPos != -1)
{
StrUpper = StrUpper.Substring(xPos + 1, (StrUpper.Length - xPos - 1));
}
for (int i = 0; i < StrUpper.Length; i++)
{
char cellVal = StrUpper[i];
int n = HString.IndexOf(cellVal);
if (n == -1)
{
throw (new ArgumentException("Invalid string in constructor."));
}
else
{
ResultBigInt = ResultBigInt.Mul8() + (uint)n;
}
}
ResultBigInt.Reduce();
}
else
{
int xPos = StrUpper.IndexOf("X");
if (xPos != -1)
{
StrUpper = StrUpper.Substring(xPos + 1, (StrUpper.Length - xPos - 1));
}
for (int i = 0; i < StrUpper.Length; i++)
{
char cellVal = StrUpper[i];
int n = HString.IndexOf(cellVal);
if (n == -1)
{
throw (new ArgumentException("Invalid string in constructor."));
}
else
{
ResultBigInt = ResultBigInt.Mul16() + (uint)n;
}
}
ResultBigInt.Reduce();
}
/*if (Sign == signt.negative) // overflow check for overflow on negative value
* {
* if ((ResultBigInt.Value[Size - 1] & HIGH_BIT_MASK) == 0)
* throw (new OverflowException("Size overflow, while initialising the value array."));
* }
* else // overflow check for overflow on positive value
* {
* if ((ResultBigInt.Value[Size - 1] & HIGH_BIT_MASK) != 0)
* throw (new OverflowException("Size overflow, while initialising the value array."));
* }*/
for (int i = 0; i < ResultBigInt.Spart; i++)
{
this.Value[i] = ResultBigInt.Value[i];
}
this.Spart = ResultBigInt.Spart;
if (this.Spart == 0)
{
this.Spart = 1;
}
}
