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Moved LZRW1CompressionModule into Modules

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Michael Becker 2014-04-20 13:12:00 -04:00
parent 019922238c
commit 61fe76671b
1 changed files with 0 additions and 74 deletions
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74
CSharp/Libraries/UniversalEditor.Compression/LZRW1/LZRW1CompressionModule.cs
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@ -1,74 +0,0 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace UniversalEditor.Compression.LZRW1
{
public class LZRW1CompressionModule
{
/// <summary>
/// Number of bytes used by copy flag
/// </summary>
private const byte FLAG_BYTES = 0x04;
private const byte FLAG_COMPRESS = 0x00;
private const byte FLAG_COPY = 0x01;
public static byte[] Decompress(byte[] input)
{
byte[] output = null;
if (input[0] == FLAG_COPY)
{
output = new byte[input.Length - FLAG_BYTES];
Array.Copy(input, FLAG_BYTES, output, 0, input.Length - FLAG_BYTES);
}
else
{
ushort controlbits = 0, control = 0;
int p_src = FLAG_BYTES;
Accessors.MemoryAccessor ma = new Accessors.MemoryAccessor();
IO.Writer bw = new IO.Writer(ma);
while (p_src != input.Length)
{
if (controlbits == 0)
{
control = input[p_src++];
control |= (ushort)(input[p_src] << 8);
controlbits = 16;
}
if ((control & 1) != 0)
{
ushort offset, len;
int p;
offset = (ushort)((input[p_src] & 0xF0) << 4);
len = (ushort)(1 + (input[p_src++] & 0xF));
offset += (ushort)(input[p_src++] & 0xFF);
bw.Flush();
byte[] out1 = ma.ToArray();
p = out1.Length - offset;
while (len-- != 0)
{
bw.WriteByte(out1[p++]);
}
}
else
{
bw.WriteByte(input[p_src++]);
}
control >>= 1;
controlbits--;
}
bw.Flush();
bw.Close();
output = ma.ToArray();
}
return output;
}
}
}