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Soar Qin
2023-07-11 21:58:58 +08:00
parent bf6808f565
commit cb88f268f6
11 changed files with 209 additions and 75 deletions
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28
CompressSave/Wrapper/DecompressionStream.cs
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@@ -15,8 +15,9 @@ public class DecompressionStream : Stream
public override long Length => inStream.Length;
public override long Position
{ get => readPos;
public override long Position
{
get => readPos;
set
{
if (value < readPos)
@@ -28,7 +29,7 @@ public class DecompressionStream : Stream
{
value -= Read(tmpBuffer, 0, (int)(value < 1024 ? value : 1024));
}
}
}
}
public Stream inStream;
@@ -41,11 +42,11 @@ public class DecompressionStream : Stream
readonly long startPos = 0;
long readPos = 0; //sum of readlen
public DecompressionStream(WrapperDefines wrap, Stream inStream,int extraBufferSize = 512*1024)
public DecompressionStream(WrapperDefines wrap, Stream inputStream, int extraBufferSize = 512 * 1024)
{
this.wrapper = wrap;
this.inStream = inStream;
startPos = inStream.Position;
wrapper = wrap;
inStream = inputStream;
startPos = inputStream.Position;
srcBuffer = new ByteSpan(new byte[extraBufferSize]);
int len = Fill();
long expect = wrapper.DecompressBegin(ref dctx, srcBuffer.Buffer, ref len, out var blockSize);
@@ -67,23 +68,24 @@ public class DecompressionStream : Stream
public int Fill()
{
int suplus = srcBuffer.Length - srcBuffer.Position;
if (srcBuffer.Length> 0 && srcBuffer.Position >= suplus)
if (srcBuffer.Length > 0 && srcBuffer.Position >= suplus)
{
Array.Copy(srcBuffer, srcBuffer.Position, srcBuffer, 0, suplus);
srcBuffer.Length -= srcBuffer.Position;
srcBuffer.Position = 0;
}
if (srcBuffer.IdleCapacity > 0)
{
var readlen = inStream.Read(srcBuffer, srcBuffer.Length, srcBuffer.IdleCapacity);
srcBuffer.Length += readlen;
}
return srcBuffer.Length - srcBuffer.Position;
}
public override void Flush()
{
}
protected override void Dispose(bool disposing)
@@ -101,7 +103,8 @@ public class DecompressionStream : Stream
var buffSize = Fill();
if (buffSize <= 0) return readlen;
var rt = wrapper.DecompressUpdateEx(dctx, dcmpBuffer, 0, dcmpBuffer.Capacity, srcBuffer, srcBuffer.Position,buffSize);
var rt = wrapper.DecompressUpdateEx(dctx, dcmpBuffer, 0, dcmpBuffer.Capacity, srcBuffer, srcBuffer.Position,
buffSize);
if (rt.Expect < 0) throw new Exception(rt.Expect.ToString());
if (rt.Expect == 0) decompressFinish = true;
@@ -109,6 +112,7 @@ public class DecompressionStream : Stream
dcmpBuffer.Position = 0;
dcmpBuffer.Length = (int)rt.WriteLen;
}
readPos += readlen;
return readlen;
}
@@ -120,7 +124,8 @@ public class DecompressionStream : Stream
var buffSize = Fill();
if (buffSize <= 0) return -1;
var rt = wrapper.DecompressUpdateEx(dctx, dcmpBuffer, 0, dcmpBuffer.Capacity, srcBuffer, srcBuffer.Position, buffSize);
var rt = wrapper.DecompressUpdateEx(dctx, dcmpBuffer, 0, dcmpBuffer.Capacity, srcBuffer, srcBuffer.Position,
buffSize);
if (rt.Expect < 0) throw new Exception(rt.Expect.ToString());
if (rt.Expect == 0) decompressFinish = true;
@@ -128,6 +133,7 @@ public class DecompressionStream : Stream
dcmpBuffer.Position = 0;
dcmpBuffer.Length = (int)rt.WriteLen;
}
return dcmpBuffer.Buffer[dcmpBuffer.Position];
}