Ryujinx/Ryujinx.Graphics/Vic/StructUnpacker.cs
Alex Barney 1f554c1093 Do naming refactoring on Ryujinx.Graphics (#611)
* Renaming part 1

* Renaming part 2

* Renaming part 3

* Renaming part 4

* Renaming part 5

* Renaming part 6

* Renaming part 7

* Renaming part 8

* Renaming part 9

* Renaming part 10

* General cleanup

* Thought I got all of these

* Apply #595

* Additional renaming

* Tweaks from feedback

* Rename files
2019-03-04 12:45:25 +11:00

69 lines
No EOL
1.4 KiB
C#

using Ryujinx.Graphics.Memory;
using System;
namespace Ryujinx.Graphics.Vic
{
class StructUnpacker
{
private NvGpuVmm _vmm;
private long _position;
private ulong _buffer;
private int _buffPos;
public StructUnpacker(NvGpuVmm vmm, long position)
{
_vmm = vmm;
_position = position;
_buffPos = 64;
}
public int Read(int bits)
{
if ((uint)bits > 32)
{
throw new ArgumentOutOfRangeException(nameof(bits));
}
int value = 0;
while (bits > 0)
{
RefillBufferIfNeeded();
int readBits = bits;
int maxReadBits = 64 - _buffPos;
if (readBits > maxReadBits)
{
readBits = maxReadBits;
}
value <<= readBits;
value |= (int)(_buffer >> _buffPos) & (int)(0xffffffff >> (32 - readBits));
_buffPos += readBits;
bits -= readBits;
}
return value;
}
private void RefillBufferIfNeeded()
{
if (_buffPos >= 64)
{
_buffer = _vmm.ReadUInt64(_position);
_position += 8;
_buffPos = 0;
}
}
}
}