public Base64TwoCharacterMap(Base64EncodedCharacterSet charSet)
{
const byte maxSize = 123;
_map = new byte[maxSize][];
var chars = charSet.Chars;
byte v = 0;
for (var i = 0; i < chars.Length; i += 2)
{
var xi = chars[i];
var x = _map[xi];
if (x == null)
{
x = new byte[maxSize];
_map[xi] = x;
}
x[chars[i + 1]] = v++;
}
}
public Base64FourCharacterMap(Base64EncodedCharacterSet charSet)
{
const byte maxSize = 123;
_map = new byte[maxSize][][][];
var chars = charSet.Chars;
byte v = 0;
for (var i = 0; i < chars.Length; i += 4)
{
var midx = chars[i];
var m1 = _map[midx];
if (m1 == null)
{
m1 = new byte[maxSize][][];
_map[midx] = m1;
}
midx = chars[i + 1];
var m2 = m1[midx];
if (m2 == null)
{
m2 = new byte[maxSize][];
m1[midx] = m2;
}
midx = chars[i + 2];
var m3 = m2[midx];
if (m3 == null)
{
m3 = new byte[maxSize];
m2[midx] = m3;
}
m3[chars[i + 3]] = v++;
}
}