public static byte[] ToByteArrayUnsigned(this FastInteger i, bool bigEndian)
{
byte[] bytes = i.ToByteArray();
int length = bytes.Length;
while (length > 1 && ((bytes[length - 1] == 0 && bytes[length - 2] < 128) || (bytes[length - 1] == 255 && bytes[length - 2] >= 128)))
{
length--;
}
Array.Resize(ref bytes, length);
if (bigEndian)
{
Array.Reverse(bytes, 0, bytes.Length);
}
return(bytes);
}
public static bool UnitTest()
{
Random random = new Random(1001);
for (int i = 10000; --i >= 0;)
{
byte[] bytes1 = new byte[31 + random.Next(2)];
byte[] bytes2 = new byte[31 + random.Next(2)];
random.NextBytes(bytes1);
random.NextBytes(bytes2);
BigInteger n1 = new BigInteger(bytes1);
BigInteger n2 = new BigInteger(bytes2);
FastInteger f1 = new FastInteger(bytes1);
FastInteger f2 = new FastInteger(bytes2);
if (n1.ToString() != f1.ToString())
{
System.Diagnostics.Debugger.Break();
}
if (n2.ToString() != f2.ToString())
{
System.Diagnostics.Debugger.Break();
}
BigInteger a1 = n1 + n2;
FastInteger a2 = f1 + f2;
if (a1.ToString() != a2.ToString())
{
var by1 = a1.ToByteArray();
var by2 = a2.ToByteArray();
System.Diagnostics.Debugger.Break();
}
BigInteger s1 = n1 - n2;
FastInteger s2 = f1 - f2;
if (s1.ToString() != s2.ToString())
{
var by1 = s1.ToByteArray();
var by2 = s2.ToByteArray();
System.Diagnostics.Debugger.Break();
}
BigInteger m1 = n1 * n2;
FastInteger m2 = f1 * f2;
if (m1.ToString() != m2.ToString())
{
System.Diagnostics.Debugger.Break();
}
int shrvalue = random.Next(256) + 1;
BigInteger sh1 = n1 >> shrvalue;
FastInteger sh2 = f1 >> shrvalue;
if (sh1.ToString() != sh2.ToString())
{
System.Diagnostics.Debugger.Break();
}
if ((-f1).ToString() != (-n1).ToString() || (-f2).ToString() != (-n2).ToString())
{
System.Diagnostics.Debugger.Break();
}
int shlvalue = random.Next(256) + 1;
BigInteger shl1 = n1 << shlvalue;
FastInteger shl2 = f1 << shlvalue;
if (shl1.ToString() != shl2.ToString())
{
System.Diagnostics.Debugger.Break();
}
BigInteger and1 = n1 & n2;
FastInteger and2 = f1 & f2;
if (and1.ToString() != and2.ToString())
{
System.Diagnostics.Debugger.Break();
}
BigInteger xor1 = n1 ^ n2;
FastInteger xor2 = f1 ^ f2;
if (xor1.ToString() != xor2.ToString())
{
System.Diagnostics.Debugger.Break();
}
}
return(true);
}
