Mirrors/Ryujinx
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Rename Ryujinx.Core to Ryujinx.HLE and add a separate project for a future LLE implementation

Browse source
This commit is contained in:
gdkchan 2018-06-10 21:46:42 -03:00
parent 518fe799da
commit 76f3b1b3a4
248 changed files with 2266 additions and 2244 deletions
Download patch file Download diff file Expand all files Collapse all files

78
Ryujinx.HLE/Loaders/Compression/Lz4.cs Normal file
View file

@ -0,0 +1,78 @@
using System;
namespace Ryujinx.HLE.Loaders.Compression
{
static class Lz4
{
public static byte[] Decompress(byte[] Cmp, int DecLength)
{
byte[] Dec = new byte[DecLength];
int CmpPos = 0;
int DecPos = 0;
int GetLength(int Length)
{
byte Sum;
if (Length == 0xf)
{
do
{
Length += (Sum = Cmp[CmpPos++]);
}
while (Sum == 0xff);
}
return Length;
}
do
{
byte Token = Cmp[CmpPos++];
int EncCount = (Token >> 0) & 0xf;
int LitCount = (Token >> 4) & 0xf;
//Copy literal chunck
LitCount = GetLength(LitCount);
Buffer.BlockCopy(Cmp, CmpPos, Dec, DecPos, LitCount);
CmpPos += LitCount;
DecPos += LitCount;
if (CmpPos >= Cmp.Length)
{
break;
}
//Copy compressed chunck
int Back = Cmp[CmpPos++] << 0 |
Cmp[CmpPos++] << 8;
EncCount = GetLength(EncCount) + 4;
int EncPos = DecPos - Back;
if (EncCount <= Back)
{
Buffer.BlockCopy(Dec, EncPos, Dec, DecPos, EncCount);
DecPos += EncCount;
}
else
{
while (EncCount-- > 0)
{
Dec[DecPos++] = Dec[EncPos++];
}
}
}
while (CmpPos < Cmp.Length &&
DecPos < Dec.Length);
return Dec;
}
}
}