private Byte[] DecodeFromUnNormalizedInput(Byte[] input)
{
BufferByteArray decoded = new BufferByteArray((input.Length / 4 * 3));
var buffer = this.GetBuffer();
Int32 bufferIndex = 0;
UInt32 bbbb = 0;
Int32 bIndex = 0;
Byte c = 0;
Int32 paddingCount = 0;
var decodeTable = this.Base64CharTable.DecodeTable; //For performance improvement
Int32 length = input.Length; //For performance improvement
for (int i = 0; i < length; i++)
{
c = decodeTable[input[i]];
if (c == 255)
{
continue;
}
if (bufferIndex + 3 >= buffer.Length)
{
decoded.Add(buffer, bufferIndex);
bufferIndex = 0;
}
bbbb = bbbb << 6 | c;
bIndex += 1;
if (input[i] == 61)// =
{
paddingCount++;
}
if (bIndex == 4)
{
buffer[bufferIndex++] = (byte)((bbbb >> 16) & 0xFF);
buffer[bufferIndex++] = (byte)((bbbb >> 8) & 0xFF);
buffer[bufferIndex++] = (byte)(bbbb & 0xFF);
bbbb = 0;
bIndex = 0;
}
}
if (bufferIndex > 0)
{
decoded.Add(buffer, bufferIndex - paddingCount);
}
return(decoded.ToArray());
}
private Byte[] EncodeWithInsertingNewline(Byte[] input)
{
BufferByteArray encoded = new BufferByteArray((input.Length / 3) * 4);
var buffer = this.GetBuffer();
var bufferIndex = 0;
Int32 loopCount = input.Length / 3;
Byte c0, c1, c2;
Int32 startIndex = 0;
Int32 charCountPerLine = 0;
Int32 paddingCount = 0;
var encodeTable = this.Base64CharTable.EncodeTable;
for (int i = 0; i < loopCount; i++)
{
startIndex = i * 3;
c0 = input[startIndex];
c1 = input[startIndex + 1];
c2 = input[startIndex + 2];
if (bufferIndex + 6 >= buffer.Length)
{
encoded.Add(buffer, bufferIndex);
bufferIndex = 0;
}
buffer[bufferIndex++] = encodeTable[c0 >> 2];
buffer[bufferIndex++] = encodeTable[(c1 >> 4) | ((c0 & 0x3) << 4)];
buffer[bufferIndex++] = encodeTable[((c1 & 0x0f) << 2) | (c2 >> 6)];
buffer[bufferIndex++] = encodeTable[c2 & 63];
charCountPerLine += 4;
if (charCountPerLine >= this.CharCountPerLine)
{
buffer[bufferIndex++] = 13; // \r
buffer[bufferIndex++] = 10; // \n
charCountPerLine = 0;
}
}
if (loopCount > 0)
{
startIndex += 3;
}
if (bufferIndex + 4 > buffer.Length)
{
encoded.Add(buffer, bufferIndex);
}
if (input.Length - startIndex == 2)
{
c0 = input[startIndex];
c1 = input[startIndex + 1];
c2 = 0;
buffer[bufferIndex++] = encodeTable[c0 >> 2];
buffer[bufferIndex++] = encodeTable[(c1 >> 4) | ((c0 & 0x3) << 4)];
buffer[bufferIndex++] = encodeTable[((c1 & 0x0f) << 2) | (c2 >> 6)];
buffer[bufferIndex++] = 61;
paddingCount = 1;
}
else if (input.Length - startIndex == 1)
{
c0 = input[startIndex];
c1 = 0;
c2 = 0;
buffer[bufferIndex++] = encodeTable[c0 >> 2];
buffer[bufferIndex++] = encodeTable[(c1 >> 4) | ((c0 & 0x3) << 4)];
buffer[bufferIndex++] = 61;
buffer[bufferIndex++] = 61;
paddingCount = 2;
}
if (bufferIndex > 0)
{
if (this.Padding == true)
{
encoded.Add(buffer, bufferIndex);
}
else
{
encoded.Add(buffer, bufferIndex - paddingCount);
}
}
return(encoded.ToArray());
}
public override Byte[] Decode(Byte[] input)
{
BufferByteArray decoded = new BufferByteArray(input.Length);
var buffer = this.GetBuffer();
Int32 bufferIndex = 0;
var bbb = new byte[3];
var bbbIndex = 0;
Byte b = 0;
Byte c = 0;
var length = input.Length;
for (int i = 0; i < length; i++)
{
c = input[i];
if (bufferIndex + 3 > buffer.Length)
{
decoded.Add(buffer, bufferIndex);
bufferIndex = 0;
}
if (bbbIndex == 0)
{
if (c == 61) // =
{
bbb[bbbIndex++] = c;
}
else if (this.Mode == QuotedPrintableConvertMode.Header && c == 0x5f) // _
{
buffer[bufferIndex++] = 32; // white space
}
else
{
// NonQuotedChar
buffer[bufferIndex++] = c;
}
}
else
{
// QuotedChar
bbb[bbbIndex++] = c;
}
if (bbbIndex == 3)
{
if (bbb[1] == 13 && bbb[2] == 10)
{
// New line
bbbIndex = 0;
}
else if (bbb[1] == 13 || bbb[1] == 10)
{
if (bbb[2] == 61)
{
bbbIndex = 1;
}
else
{
buffer[bufferIndex++] = bbb[2];
bbbIndex = 0;
}
}
else
{
byte d = 0;
for (var bIndex = 1; bIndex < 3; bIndex++)
{
d <<= 4;
b = bbb[bIndex];
if (0x30 <= b && b <= 0x39)
{
d |= (byte)(b - 0x30);// 0-9
}
else if (0x41 <= b && b <= 0x46)
{
d |= (byte)(b - 0x37);// A-F
}
else if (0x61 <= b && b <= 0x66)
{
d |= (byte)(b - 0x57);// a-f
}
else
{
throw new FormatException();
}
}
buffer[bufferIndex++] = d;
bbbIndex = 0;
}
}
}
if (bufferIndex > 0)
{
decoded.Add(buffer, bufferIndex);
}
return decoded.ToArray();
}
public override Byte[] Encode(Byte[] input)
{
BufferByteArray decoded = new BufferByteArray(input.Length * 3);
var buffer = this.GetBuffer();
Int32 bufferIndex = 0;
Byte c = 0;
Int32 charCount = 0;
Int32 length = input.Length;
for (int i = 0; i < length; i++)
{
c = input[i];
if (bufferIndex + 6 > buffer.Length)
{
decoded.Add(buffer, bufferIndex);
bufferIndex = 0;
}
if (InsertNewline == true && this.CharCountPerLine - 3 < charCount)//Insert new line
{
var escaped = false;
if (c == 0x09 || c == 0x20)
{
// \t or white space
buffer[bufferIndex++] = 61; // '='
buffer[bufferIndex++] = HexAlphabet[(c & 0xf0) >> 4];
buffer[bufferIndex++] = HexAlphabet[c & 0x0f];
escaped = true;
}
buffer[bufferIndex++] = 61; // '='
buffer[bufferIndex++] = 13; // \r
buffer[bufferIndex++] = 10; // \n
charCount = 0;
if (escaped) { continue; }
}
var quote = false;
switch (c)
{
case 9: // \t
case 32: // ' ' WhiteSpace
case 63: // ?
case 95: // _
quote = this.InsertNewline == false;
break;
case 0x3d: // '='
quote = true;
break;
default:
// NonPrintableChar
quote = (c < 33 || 127 < c);
break;
}
if (quote == true)
{
// = or NonPrintableChar
buffer[bufferIndex++] = 61; // '='
buffer[bufferIndex++] = HexAlphabet[(c & 0xf0) >> 4];
buffer[bufferIndex++] = HexAlphabet[c & 0x0f];
charCount += 3;
}
else
{
// = or PrintableChar
buffer[bufferIndex++] = c;
charCount++;
}
}
if (bufferIndex > 0)
{
decoded.Add(buffer, bufferIndex);
}
return decoded.ToArray();
}
private Byte[] EncodeWithInsertingNewline(Byte[] input)
{
BufferByteArray encoded = new BufferByteArray((input.Length / 3) * 4);
var buffer = this.GetBuffer();
var bufferIndex = 0;
Int32 loopCount = input.Length / 3;
Byte c0, c1, c2;
Int32 startIndex = 0;
Int32 charCountPerLine = 0;
Int32 paddingCount = 0;
var encodeTable = this.Base64CharTable.EncodeTable;
for (int i = 0; i < loopCount; i++)
{
startIndex = i * 3;
c0 = input[startIndex];
c1 = input[startIndex + 1];
c2 = input[startIndex + 2];
if (bufferIndex + 6 >= buffer.Length)
{
encoded.Add(buffer, bufferIndex);
bufferIndex = 0;
}
buffer[bufferIndex++] = encodeTable[c0 >> 2];
buffer[bufferIndex++] = encodeTable[(c1 >> 4) | ((c0 & 0x3) << 4)];
buffer[bufferIndex++] = encodeTable[((c1 & 0x0f) << 2) | (c2 >> 6)];
buffer[bufferIndex++] = encodeTable[c2 & 63];
charCountPerLine += 4;
if (charCountPerLine >= this.CharCountPerLine)
{
buffer[bufferIndex++] = 13;// \r
buffer[bufferIndex++] = 10;// \n
charCountPerLine = 0;
}
}
if (loopCount > 0)
{
startIndex += 3;
}
if (bufferIndex + 4 > buffer.Length)
{
encoded.Add(buffer, bufferIndex);
}
if (input.Length - startIndex == 2)
{
c0 = input[startIndex];
c1 = input[startIndex + 1];
c2 = 0;
buffer[bufferIndex++] = encodeTable[c0 >> 2];
buffer[bufferIndex++] = encodeTable[(c1 >> 4) | ((c0 & 0x3) << 4)];
buffer[bufferIndex++] = encodeTable[((c1 & 0x0f) << 2) | (c2 >> 6)];
buffer[bufferIndex++] = 61;
paddingCount = 1;
}
else if (input.Length - startIndex == 1)
{
c0 = input[startIndex];
c1 = 0;
c2 = 0;
buffer[bufferIndex++] = encodeTable[c0 >> 2];
buffer[bufferIndex++] = encodeTable[(c1 >> 4) | ((c0 & 0x3) << 4)];
buffer[bufferIndex++] = 61;
buffer[bufferIndex++] = 61;
paddingCount = 2;
}
if (bufferIndex > 0)
{
if (this.Padding == true)
{
encoded.Add(buffer, bufferIndex);
}
else
{
encoded.Add(buffer, bufferIndex - paddingCount);
}
}
return encoded.ToArray();
}
private Byte[] DecodeFromUnNormalizedInput(Byte[] input)
{
BufferByteArray decoded = new BufferByteArray((input.Length / 4 * 3));
var buffer = this.GetBuffer();
Int32 bufferIndex = 0;
UInt32 bbbb = 0;
Int32 bIndex = 0;
Byte c = 0;
Int32 paddingCount = 0;
var decodeTable = this.Base64CharTable.DecodeTable;//For performance improvement
Int32 length = input.Length;//For performance improvement
for (int i = 0; i < length; i++)
{
c = decodeTable[input[i]];
if (c == 255) { continue; }
if (bufferIndex + 3 >= buffer.Length)
{
decoded.Add(buffer, bufferIndex);
bufferIndex = 0;
}
bbbb = bbbb << 6 | c;
bIndex += 1;
if (input[i] == 61)// =
{
paddingCount++;
}
if (bIndex == 4)
{
buffer[bufferIndex++] = (byte)((bbbb >> 16) & 0xFF);
buffer[bufferIndex++] = (byte)((bbbb >> 8) & 0xFF);
buffer[bufferIndex++] = (byte)(bbbb & 0xFF);
bbbb = 0;
bIndex = 0;
}
}
if (bufferIndex > 0)
{
decoded.Add(buffer, bufferIndex - paddingCount);
}
return decoded.ToArray();
}
public override Byte[] Encode(Byte[] input)
{
BufferByteArray decoded = new BufferByteArray(input.Length * 3);
var buffer = this.GetBuffer();
Int32 bufferIndex = 0;
Byte c = 0;
Int32 charCount = 0;
Int32 length = input.Length;
for (int i = 0; i < length; i++)
{
c = input[i];
if (bufferIndex + 6 > buffer.Length)
{
decoded.Add(buffer, bufferIndex);
bufferIndex = 0;
}
if (InsertNewline == true && this.CharCountPerLine - 3 < charCount)//Insert new line
{
var escaped = false;
if (c == 0x09 || c == 0x20)
{
// \t or white space
buffer[bufferIndex++] = 61; // '='
buffer[bufferIndex++] = HexAlphabet[(c & 0xf0) >> 4];
buffer[bufferIndex++] = HexAlphabet[c & 0x0f];
escaped = true;
}
buffer[bufferIndex++] = 61; // '='
buffer[bufferIndex++] = 13; // \r
buffer[bufferIndex++] = 10; // \n
charCount = 0;
if (escaped)
{
continue;
}
}
var quote = false;
switch (c)
{
case 9: // \t
case 32: // ' ' WhiteSpace
case 63: // ?
case 95: // _
quote = this.InsertNewline == false;
break;
case 0x3d: // '='
quote = true;
break;
default:
// NonPrintableChar
quote = (c < 33 || 127 < c);
break;
}
if (quote == true)
{
// = or NonPrintableChar
buffer[bufferIndex++] = 61; // '='
buffer[bufferIndex++] = HexAlphabet[(c & 0xf0) >> 4];
buffer[bufferIndex++] = HexAlphabet[c & 0x0f];
charCount += 3;
}
else
{
// = or PrintableChar
buffer[bufferIndex++] = c;
charCount++;
}
}
if (bufferIndex > 0)
{
decoded.Add(buffer, bufferIndex);
}
return(decoded.ToArray());
}
public override Byte[] Decode(Byte[] input)
{
BufferByteArray decoded = new BufferByteArray(input.Length);
var buffer = this.GetBuffer();
Int32 bufferIndex = 0;
var bbb = new byte[3];
var bbbIndex = 0;
Byte b = 0;
Byte c = 0;
var length = input.Length;
for (int i = 0; i < length; i++)
{
c = input[i];
if (bufferIndex + 3 > buffer.Length)
{
decoded.Add(buffer, bufferIndex);
bufferIndex = 0;
}
if (bbbIndex == 0)
{
if (c == 61) // =
{
bbb[bbbIndex++] = c;
}
else if (this.Mode == QuotedPrintableConvertMode.Header && c == 0x5f) // _
{
buffer[bufferIndex++] = 32; // white space
}
else
{
// NonQuotedChar
buffer[bufferIndex++] = c;
}
}
else
{
// QuotedChar
bbb[bbbIndex++] = c;
}
if (bbbIndex == 3)
{
if (bbb[1] == 13 && bbb[2] == 10)
{
// New line
bbbIndex = 0;
}
else if (bbb[1] == 13 || bbb[1] == 10)
{
if (bbb[2] == 61)
{
bbbIndex = 1;
}
else
{
buffer[bufferIndex++] = bbb[2];
bbbIndex = 0;
}
}
else
{
byte d = 0;
for (var bIndex = 1; bIndex < 3; bIndex++)
{
d <<= 4;
b = bbb[bIndex];
if (0x30 <= b && b <= 0x39)
{
d |= (byte)(b - 0x30);// 0-9
}
else if (0x41 <= b && b <= 0x46)
{
d |= (byte)(b - 0x37);// A-F
}
else if (0x61 <= b && b <= 0x66)
{
d |= (byte)(b - 0x57);// a-f
}
else
{
//Not encoded text
}
}
if (d > 0)
{
buffer[bufferIndex++] = d;
}
else
{
buffer[bufferIndex++] = bbb[0];
buffer[bufferIndex++] = bbb[1];
buffer[bufferIndex++] = bbb[2];
}
bbbIndex = 0;
}
}
}
if (bufferIndex > 0)
{
decoded.Add(buffer, bufferIndex);
}
return(decoded.ToArray());
}