public static int DecodeInto(byte[] src, byte[] dest)
{
FastByteReader r = new FastByteReader(src);
int i = 0;
while (!r.Done())
{
byte cmd = r.ReadByte();
if (cmd == 0)
{
byte count = r.ReadByte();
while (count-- > 0)
{
dest[i++] = 0;
}
}
else
{
dest[i++] = cmd;
}
}
return(i);
}
public static void DecodeInto(byte[] src, byte[] dest, int destIndex)
{
var r = new FastByteReader(src);
while (!r.Done())
{
var cmd = r.ReadByte();
if (cmd == 0)
{
var count = r.ReadByte();
while (count-- > 0)
dest[destIndex++] = 0;
}
else
dest[destIndex++] = cmd;
}
}
public static int DecodeInto(byte[] src, byte[] dest)
{
FastByteReader r = new FastByteReader(src);
int i = 0;
while (!r.Done())
{
byte cmd = r.ReadByte();
if (cmd == 0)
{
byte count = r.ReadByte();
while (count-- > 0)
dest[i++] = 0;
}
else
dest[i++] = cmd;
}
return i;
}
public static void DecodeInto(byte[] src, byte[] dest, int destIndex)
{
var r = new FastByteReader(src);
while (!r.Done())
{
var cmd = r.ReadByte();
if (cmd == 0)
{
var count = r.ReadByte();
while (count-- > 0)
{
dest[destIndex++] = 0;
}
}
else
{
dest[destIndex++] = cmd;
}
}
}
public static int DecodeInto(byte[] src, byte[] dest, int srcOffset)
{
var ctx = new FastByteReader(src, srcOffset);
var destIndex = 0;
while (true)
{
var i = ctx.ReadByte();
if ((i & 0x80) == 0)
{
var count = i & 0x7F;
if (count == 0)
{
// case 6
count = ctx.ReadByte();
var value = ctx.ReadByte();
for (var end = destIndex + count; destIndex < end; destIndex++)
{
dest[destIndex] ^= value;
}
}
else
{
// case 5
for (var end = destIndex + count; destIndex < end; destIndex++)
{
dest[destIndex] ^= ctx.ReadByte();
}
}
}
else
{
var count = i & 0x7F;
if (count == 0)
{
count = ctx.ReadWord();
if (count == 0)
{
return(destIndex);
}
if ((count & 0x8000) == 0)
{
// case 2
destIndex += count & 0x7FFF;
}
else if ((count & 0x4000) == 0)
{
// case 3
for (var end = destIndex + (count & 0x3FFF); destIndex < end; destIndex++)
{
dest[destIndex] ^= ctx.ReadByte();
}
}
else
{
// case 4
var value = ctx.ReadByte();
for (var end = destIndex + (count & 0x3FFF); destIndex < end; destIndex++)
{
dest[destIndex] ^= value;
}
}
}
else
{
// case 1
destIndex += count;
}
}
}
}
public static int DecodeInto(byte[] src, byte[] dest, int srcOffset = 0, bool reverse = false)
{
var ctx = new FastByteReader(src, srcOffset);
var destIndex = 0;
while (true)
{
var i = ctx.ReadByte();
if ((i & 0x80) == 0)
{
// case 2
var secondByte = ctx.ReadByte();
var count = ((i & 0x70) >> 4) + 3;
var rpos = ((i & 0xf) << 8) + secondByte;
if (destIndex + count > dest.Length)
{
return(destIndex);
}
ReplicatePrevious(dest, destIndex, destIndex - rpos, count);
destIndex += count;
}
else if ((i & 0x40) == 0)
{
// case 1
var count = i & 0x3F;
if (count == 0)
{
return(destIndex);
}
ctx.CopyTo(dest, destIndex, count);
destIndex += count;
}
else
{
var count3 = i & 0x3F;
if (count3 == 0x3E)
{
// case 4
var count = ctx.ReadWord();
var color = ctx.ReadByte();
for (var end = destIndex + count; destIndex < end; destIndex++)
{
dest[destIndex] = color;
}
}
else
{
// If count3 == 0x3F it's case 5, else case 3
var count = count3 == 0x3F ? ctx.ReadWord() : count3 + 3;
var srcIndex = reverse ? destIndex - ctx.ReadWord() : ctx.ReadWord();
if (srcIndex >= destIndex)
{
throw new NotImplementedException($"srcIndex >= destIndex {srcIndex} {destIndex}");
}
for (var end = destIndex + count; destIndex < end; destIndex++)
{
dest[destIndex] = dest[srcIndex++];
}
}
}
}
}
public static int DecodeInto( byte[] src, byte[] dest )
{
var ctx = new FastByteReader(src);
int destIndex = 0;
while( true )
{
byte i = ctx.ReadByte();
if( ( i & 0x80 ) == 0 )
{
int count = i & 0x7F;
if( count == 0 )
{
// case 6
count = ctx.ReadByte();
byte value = ctx.ReadByte();
for( int end = destIndex + count ; destIndex < end ; destIndex++ )
dest[ destIndex ] ^= value;
}
else
{
// case 5
for( int end = destIndex + count ; destIndex < end ; destIndex++ )
dest[destIndex] ^= ctx.ReadByte();
}
}
else
{
int count = i & 0x7F;
if( count == 0 )
{
count = ctx.ReadWord();
if( count == 0 )
return destIndex;
if( ( count & 0x8000 ) == 0 )
{
// case 2
destIndex += ( count & 0x7FFF );
}
else if( ( count & 0x4000 ) == 0 )
{
// case 3
for( int end = destIndex + ( count & 0x3FFF ) ; destIndex < end ; destIndex++ )
dest[destIndex] ^= ctx.ReadByte();
}
else
{
// case 4
byte value = ctx.ReadByte();
for( int end = destIndex + ( count & 0x3FFF ) ; destIndex < end ; destIndex++ )
dest[ destIndex ] ^= value;
}
}
else
{
// case 1
destIndex += count;
}
}
}
}
