}//ToBase32()
public static byte[] FromBase32(this string str32, Base32Config config = null)
{
int length = str32.Length;
int bit5length = length / 8;
if (bit5length * 8 != length)
throw new ArgumentOutOfRangeException("str32", "'str32' string length must be a multiple of 8.");
if (config == null)
config = Base32Config.Default;
var reverseMap = config.ReverseMap;
int byteLength = bit5length * 5;
byte[] result = new byte[byteLength];
long tmp;
for (int i = 0, indexStart = 4, index = indexStart; i < length; i += 8, indexStart += 5, index = indexStart)
{
tmp =
reverseMap[str32[i + 0]] << 35 |
reverseMap[str32[i + 1]] << 30 |
reverseMap[str32[i + 2]] << 25 |
reverseMap[str32[i + 3]] << 20 |
reverseMap[str32[i + 4]] << 15 |
reverseMap[str32[i + 5]] << 10 |
reverseMap[str32[i + 6]] << 5 |
reverseMap[str32[i + 7]];
result[index--] = (byte)tmp; tmp >>= 8;
result[index--] = (byte)tmp; tmp >>= 8;
result[index--] = (byte)tmp; tmp >>= 8;
result[index--] = (byte)tmp; tmp >>= 8;
result[index--] = (byte)tmp; tmp >>= 8;
}
return result;
}//FromBase32()
}//ToBase32()
public static string ToBase32(this ArraySegment<byte> binarySegment, Base32Config config = null)
{
byte[] binaryArray = binarySegment.Array;
int binaryLength = binarySegment.Count;
int binaryOffset = binarySegment.Offset;
int bitLength = binaryLength * 8;
int base32Length = bitLength / 5;
if (base32Length * 5 != bitLength)
throw new ArgumentOutOfRangeException("binary", "'binary' array length must be a multiple of 5.");
if (config == null)
config = Base32Config.Default;
var base32table = config.Base32table;
char[] chArray = new char[base32Length];
for (int i = 0, num2Start = 7, num2 = num2Start, index, num4; i < binaryLength; i += 5, num2Start += 8, num2 = num2Start)
{
num4 = binaryArray[binaryOffset + i + 1] << 24 | binaryArray[binaryOffset + i + 2] << 16 | binaryArray[binaryOffset + i + 3] << 8 | binaryArray[binaryOffset + i + 4];
index = num4 & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 5) & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 10) & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 15) & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 20) & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 25) & 31;
chArray[num2--] = base32table[index];
num4 = (num4 >> 30) & 3 | binaryArray[binaryOffset + i] << 2;
index = num4 & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 5) & 31;
chArray[num2--] = base32table[index];
}
return new string(chArray);
}//ToBase32()
/// <summary>
/// Converts a byte array into equivalent Base32-encoded string.
/// </summary>
/// <remarks>Binary array length must be a multiple of 5.</remarks>
public static string ToBase32(this byte[] binary, Base32Config config = null)
{
int length = binary.Length;
int bitLength = checked(length * 8);
int base32Length = bitLength / 5;
if (base32Length * 5 != bitLength)
throw new ArgumentOutOfRangeException(nameof(binary), $"'{nameof(binary)}' array length must be a multiple of 5.");
if (config == null)
config = Base32Config.Default;
var base32table = config.Base32table;
char[] chArray = new char[base32Length];
for (int i = 0, num2Start = 7, num2 = num2Start, index, num4; i < length; i += 5, num2Start += 8, num2 = num2Start)
{
num4 = binary[i + 1] << 24 | binary[i + 2] << 16 | binary[i + 3] << 8 | binary[i + 4];
index = num4 & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 5) & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 10) & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 15) & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 20) & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 25) & 31;
chArray[num2--] = base32table[index];
num4 = (num4 >> 30) & 3 | binary[i] << 2;
index = num4 & 31;
chArray[num2--] = base32table[index];
index = (num4 >> 5) & 31;
chArray[num2--] = base32table[index];
}
return new string(chArray);
}//ToBase32()
