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This commit is contained in:
Gustave Monce
2021-08-09 20:21:09 +02:00
parent 9865ef7f79
commit 847ce0506d
411 changed files with 5922 additions and 54941 deletions
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7zip/Compress/LZ/LzOutWindow.cs
+32 -5
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@@ -4,11 +4,11 @@ namespace SevenZip.Compression.LZ
{
public class OutWindow
{
byte[] _buffer = null;
uint _pos;
uint _windowSize = 0;
uint _streamPos;
System.IO.Stream _stream;
private byte[] _buffer = null;
private uint _pos;
private uint _windowSize = 0;
private uint _streamPos;
private System.IO.Stream _stream;
public uint TrainSize = 0;
@@ -47,15 +47,23 @@ namespace SevenZip.Compression.LZ
{
uint curSize = _windowSize - _pos;
if (size < curSize)
{
curSize = size;
}
int numReadBytes = stream.Read(_buffer, (int)_pos, (int)curSize);
if (numReadBytes == 0)
{
return false;
}
size -= (uint)numReadBytes;
_pos += (uint)numReadBytes;
_streamPos += (uint)numReadBytes;
if (_pos == _windowSize)
{
_streamPos = _pos = 0;
}
}
return true;
}
@@ -70,10 +78,16 @@ namespace SevenZip.Compression.LZ
{
uint size = _pos - _streamPos;
if (size == 0)
{
return;
}
_stream.Write(_buffer, (int)_streamPos, (int)size);
if (_pos >= _windowSize)
{
_pos = 0;
}
_streamPos = _pos;
}
@@ -81,14 +95,22 @@ namespace SevenZip.Compression.LZ
{
uint pos = _pos - distance - 1;
if (pos >= _windowSize)
{
pos += _windowSize;
}
for (; len > 0; len--)
{
if (pos >= _windowSize)
{
pos = 0;
}
_buffer[_pos++] = _buffer[pos++];
if (_pos >= _windowSize)
{
Flush();
}
}
}
@@ -96,14 +118,19 @@ namespace SevenZip.Compression.LZ
{
_buffer[_pos++] = b;
if (_pos >= _windowSize)
{
Flush();
}
}
public byte GetByte(uint distance)
{
uint pos = _pos - distance - 1;
if (pos >= _windowSize)
{
pos += _windowSize;
}
return _buffer[pos];
}
}