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hilariously messy code; but after poring over the LZRW1A sources from aluigi the billionth time, I think I've got it in C# now FINALLY

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Michael Becker 2020-01-01 22:37:06 -05:00
parent e49c789790
commit 5cc379c957
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1 changed files with 34 additions and 10 deletions
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44
CSharp/Libraries/UniversalEditor.Compression/Modules/LZRW1/LZRW1CompressionModule.cs
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@ -62,30 +62,54 @@ namespace UniversalEditor.Compression.Modules.LZRW1
control |= (uint)(br.ReadByte() << 8);
}
unroll = (uint)((br.Accessor.Position <= (br.Accessor.Length - 32)) ? 16 : 1);
while (unroll-- != 0)
while (unroll-- > 0)
{
if ((control & 1) != 0)
if ((control & 1) == 1)
{
byte offsetCalcByte1 = br.ReadByte();
ushort lenmt = br.ReadByte();
byte offsetCalcByte2 = br.ReadByte();
ushort offset = (ushort)(((offsetCalcByte1 & 0xF0) << 4) | offsetCalcByte2);
ushort len = (ushort)(offsetCalcByte1 & 0xF);
ushort offset = (ushort)(((lenmt & 0xF0) << 4) | offsetCalcByte2);
long oldpos = sao.Position;
sao.Position = sao.Length - offset;
long newpos = sao.Length - offset;
IO.Reader bro = new Reader(sao);
byte value = bro.ReadByte();
sao.Position = oldpos;
// if((p_dst + offset) > p_dst_end) return(-1);
// look I know this is ugly but HOLY FUCK IT WORKS FINALLY OMG!!!
// i'll clean it up eventually... I promise. one of these days...
sao.Position = newpos;
byte value = bro.ReadByte();
sao.Position = oldpos;
bw.WriteByte(value);
newpos++;
oldpos++;
for (int i = 0; i < len + 3; i++)
sao.Position = newpos;
value = bro.ReadByte();
sao.Position = oldpos;
bw.WriteByte(value);
newpos++;
oldpos++;
sao.Position = newpos;
value = bro.ReadByte();
sao.Position = oldpos;
bw.WriteByte(value);
newpos++;
oldpos++;
lenmt &= 0xF;
while (lenmt-- > 0)
{
sao.Position = newpos;
value = bro.ReadByte();
sao.Position = oldpos;
bw.WriteByte(value);
newpos++;
oldpos++;
}
}
else