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git-svn-id: svn://svn.ijw.co.nz/svn/OpenRa@1953 993157c7-ee19-0410-b2c4-bb4e9862e678

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This commit is contained in:
chrisf
2008-03-25 00:45:43 +00:00
parent eb7094d49e
commit 33e856345f
16 changed files with 126 additions and 179 deletions
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72
OpenRa.FileFormats/Package.cs
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@@ -13,39 +13,48 @@ namespace OpenRa.FileFormats
public class Package : IFolder
{
readonly string filename;
readonly List<PackageEntry> index;
readonly Dictionary<uint, PackageEntry> index;
readonly bool isRmix, isEncrypted;
readonly long dataStart;
readonly Stream s;
public ICollection<PackageEntry> Content
{
get { return index.AsReadOnly(); }
}
//public ICollection<PackageEntry> Content
//{
// get { return index.AsReadOnly(); }
//}
public static Dictionary<K, V> MakeDict<K,V>(IEnumerable<V> values, Converter<V, K> keyFunc)
{
var dict = new Dictionary<K, V>();
foreach (var v in values)
dict.Add(keyFunc(v), v);
return dict;
}
public Package(string filename)
{
this.filename = filename;
using (Stream s = FileSystem.Open(filename))
s = FileSystem.Open(filename);
BinaryReader reader = new BinaryReader(s);
uint signature = reader.ReadUInt32();
isRmix = 0 == (signature & ~(uint)(MixFileFlags.Checksum | MixFileFlags.Encrypted));
if (isRmix)
{
BinaryReader reader = new BinaryReader(s);
uint signature = reader.ReadUInt32();
isRmix = 0 == (signature & ~(uint)(MixFileFlags.Checksum | MixFileFlags.Encrypted));
if (isRmix)
isEncrypted = 0 != (signature & (uint)MixFileFlags.Encrypted);
if( isEncrypted )
{
isEncrypted = 0 != (signature & (uint)MixFileFlags.Encrypted);
if( isEncrypted )
{
index = ParseRaHeader( s, out dataStart );
return;
}
index = MakeDict(ParseRaHeader( s, out dataStart ), x => x.Hash );
return;
}
isEncrypted = false;
s.Seek(0, SeekOrigin.Begin);
index = ParseTdHeader(s, out dataStart);
}
isEncrypted = false;
s.Seek(0, SeekOrigin.Begin);
index = MakeDict(ParseTdHeader(s, out dataStart), x => x.Hash );
}
const long headerStart = 84;
@@ -121,19 +130,14 @@ namespace OpenRa.FileFormats
public Stream GetContent(uint hash)
{
foreach( PackageEntry e in index )
if (e.Hash == hash)
{
using (Stream s = FileSystem.Open(filename))
{
s.Seek( dataStart + e.Offset, SeekOrigin.Begin );
byte[] data = new byte[ e.Length ];
s.Read( data, 0, (int)e.Length );
return new MemoryStream(data);
}
}
PackageEntry e;
if (!index.TryGetValue(hash, out e))
return null;
return null;
s.Seek( dataStart + e.Offset, SeekOrigin.Begin );
byte[] data = new byte[ e.Length ];
s.Read( data, 0, (int)e.Length );
return new MemoryStream(data);
}
public Stream GetContent(string filename)