mirror of
https://github.com/ryujinx-mirror/ryujinx.git
synced 2024-12-05 04:57:55 +01:00
22bacc6188
* Implement some IPC related kernel SVCs properly * Fix BLZ decompression when the segment also has a uncompressed chunck * Set default cpu core on process start from ProgramLoader, remove debug message * Load process capabilities properly on KIPs * Fix a copy/paste error in UnmapPhysicalMemory64 * Implement smarter switching between old and new IPC system to support the old HLE services implementation without the manual switch * Implement RegisterService on sm and AcceptSession (partial) * Misc fixes and improvements on new IPC methods * Move IPC related SVCs into a separate file, and logging on RegisterService (sm) * Some small fixes related to receive list buffers and error cases * Load NSOs using the correct pool partition * Fix corner case on GetMaskFromMinMax where range is 64, doesn't happen in pratice however * Fix send static buffer copy * Session release, implement closing requests on client disconnect * Implement ConnectToPort SVC * KLightSession init
107 lines
2.9 KiB
C#
107 lines
2.9 KiB
C#
using System;
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namespace Ryujinx.HLE.Loaders.Compression
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{
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static class BackwardsLz
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{
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private class BackwardsReader
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{
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private byte[] _data;
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private int _position;
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public int Position => _position;
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public BackwardsReader(byte[] data, int end)
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{
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_data = data;
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_position = end;
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}
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public void SeekCurrent(int offset)
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{
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_position += offset;
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}
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public byte ReadByte()
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{
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return _data[--_position];
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}
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public short ReadInt16()
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{
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return (short)((ReadByte() << 8) | (ReadByte() << 0));
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}
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public int ReadInt32()
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{
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return ((ReadByte() << 24) |
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(ReadByte() << 16) |
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(ReadByte() << 8) |
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(ReadByte() << 0));
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}
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}
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public static void DecompressInPlace(byte[] buffer, int headerEnd)
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{
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BackwardsReader reader = new BackwardsReader(buffer, headerEnd);
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int additionalDecLength = reader.ReadInt32();
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int startOffset = reader.ReadInt32();
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int compressedLength = reader.ReadInt32();
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reader.SeekCurrent(12 - startOffset);
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int decBase = headerEnd - compressedLength;
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int decPos = compressedLength + additionalDecLength;
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byte mask = 0;
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byte header = 0;
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while (decPos > 0)
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{
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if ((mask >>= 1) == 0)
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{
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header = reader.ReadByte();
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mask = 0x80;
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}
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if ((header & mask) == 0)
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{
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buffer[decBase + --decPos] = reader.ReadByte();
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}
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else
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{
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ushort pair = (ushort)reader.ReadInt16();
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int length = (pair >> 12) + 3;
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int position = (pair & 0xfff) + 3;
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if (length > decPos)
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{
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length = decPos;
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}
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decPos -= length;
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int dstPos = decBase + decPos;
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if (length <= position)
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{
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int srcPos = dstPos + position;
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Buffer.BlockCopy(buffer, srcPos, buffer, dstPos, length);
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}
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else
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{
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for (int offset = 0; offset < length; offset++)
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{
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buffer[dstPos + offset] = buffer[dstPos + position + offset];
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}
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}
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}
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}
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}
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}
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} |