//CREDIT goes to some guy on stackoverflow.com ups..
public static byte[] HexStringToBytes(string s)
{
const string HEX_CHARS = "0123456789ABCDEF";
if (s.Length == 0)
{
return(new byte[0]);
}
if ((s.Length + 1) % 3 != 0)
{
throw new FormatException();
}
byte[] bytes = new byte[(s.Length + 1) / 3];
int state = 0; // 0 = expect first digit, 1 = expect second digit, 2 = expect hyphen
int currentByte = 0;
int x;
int value = 0;
foreach (char c in s)
{
switch (state)
{
case 0:
x = HEX_CHARS.IndexOf(Char.ToUpperInvariant(c));
if (x == -1)
{
throw new FormatException();
}
value = x << 4;
state = 1;
break;
case 1:
x = HEX_CHARS.IndexOf(Char.ToUpperInvariant(c));
if (x == -1)
{
throw new FormatException();
}
bytes[currentByte++] = (byte)(value + x);
state = 2;
break;
case 2:
if (c != '-')
{
throw new FormatException();
}
state = 0;
break;
}
}
return(bytes);
}
public void SetPatternBytes(string s)
{
const string HEX_CHARS = "0123456789ABCDEF";
if (s.Length == 0)
this.Pattern = new byte[] { 0 };
if ((s.Length + 1) % 3 != 0)
throw new FormatException();
byte[] bytes = new byte[(s.Length + 1) / 3];
int state = 0; // 0 = expect first digit, 1 = expect second digit, 2 = expect hyphen
int currentByte = 0;
int x;
int value = 0;
foreach (char c in s)
{
switch (state)
{
case 0:
x = HEX_CHARS.IndexOf(Char.ToUpperInvariant(c));
if (x == -1)
throw new FormatException();
value = x << 4;
state = 1;
break;
case 1:
x = HEX_CHARS.IndexOf(Char.ToUpperInvariant(c));
if (x == -1)
throw new FormatException();
bytes[currentByte++] = (byte)(value + x);
state = 2;
break;
case 2:
if (c != ' ')
throw new FormatException();
state = 0;
break;
}
}
this.Pattern = bytes;
}
