e63f330717
- ShpReader will copy the input stream into memory just once rather than for every header. - ShpReader.CopyImageData switched to use Array.Copy since that uses some unsafe magic for speed. - In ActorInfo, cache a GetType call and prevent needless materialization in PrerequisitesOf. - In ObjectCreator, cache type and ctor lookups since these are expensive and often repeated. - Implement IReadOnlyDictionary<T, U> on Cache<T, U> to provide some supplementary functions. - In TechTree.GatherOwnedPrerequisites, rearrange a Boolean 'and' expression to evaluate expensive functions later in the chain, and use ContainsKey to speed up name check.
79 lines
1.7 KiB
C#
79 lines
1.7 KiB
C#
#region Copyright & License Information
|
|
/*
|
|
* Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
|
|
* This file is part of OpenRA, which is free software. It is made
|
|
* available to you under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation. For more information,
|
|
* see COPYING.
|
|
*/
|
|
#endregion
|
|
|
|
namespace OpenRA.FileFormats
|
|
{
|
|
public static class Format40
|
|
{
|
|
public static int DecodeInto(byte[] src, byte[] dest, int srcOffset)
|
|
{
|
|
var ctx = new FastByteReader(src, srcOffset);
|
|
int destIndex = 0;
|
|
|
|
while (true)
|
|
{
|
|
byte i = ctx.ReadByte();
|
|
if ((i & 0x80) == 0)
|
|
{
|
|
int count = i & 0x7F;
|
|
if (count == 0)
|
|
{
|
|
// case 6
|
|
count = ctx.ReadByte();
|
|
byte value = ctx.ReadByte();
|
|
for (int end = destIndex + count; destIndex < end; destIndex++)
|
|
dest[destIndex] ^= value;
|
|
}
|
|
else
|
|
{
|
|
// case 5
|
|
for (int end = destIndex + count; destIndex < end; destIndex++)
|
|
dest[destIndex] ^= ctx.ReadByte();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
int count = i & 0x7F;
|
|
if (count == 0)
|
|
{
|
|
count = ctx.ReadWord();
|
|
if (count == 0)
|
|
return destIndex;
|
|
|
|
if ((count & 0x8000) == 0)
|
|
{
|
|
// case 2
|
|
destIndex += (count & 0x7FFF);
|
|
}
|
|
else if ((count & 0x4000) == 0)
|
|
{
|
|
// case 3
|
|
for (int end = destIndex + (count & 0x3FFF); destIndex < end; destIndex++)
|
|
dest[destIndex] ^= ctx.ReadByte();
|
|
}
|
|
else
|
|
{
|
|
// case 4
|
|
byte value = ctx.ReadByte();
|
|
for (int end = destIndex + (count & 0x3FFF); destIndex < end; destIndex++)
|
|
dest[destIndex] ^= value;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// case 1
|
|
destIndex += count;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|