public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var g2ent = entry as G2Entry;
if (null == g2ent)
{
return(base.OpenEntry(arc, entry));
}
int entry_size = (int)g2ent.Size;
int offset = 0;
var decoders = new G2Scheme[4];
for (int i = 0; i < 4 && offset < entry_size; ++i)
{
decoders[i] = G2MetaScheme.CreateInstance(g2ent.Keys[i]);
if (null != decoders[i])
{
offset += EntryChunkSize;
}
}
var output = new byte[entry_size];
var input = new byte[EntryChunkSize];
int current_decoder = 0;
offset = 0;
while (offset < entry_size)
{
int current_chunk_size = Math.Min(EntryChunkSize, entry_size - offset);
if (null != decoders[current_decoder])
{
arc.File.View.Read(g2ent.Offset + offset, input, 0, (uint)current_chunk_size);
decoders[current_decoder].Decrypt(input, 0, output, offset, current_chunk_size);
}
else
{
arc.File.View.Read(g2ent.Offset + offset, output, offset, (uint)current_chunk_size);
}
current_decoder = (current_decoder + 1) & 3;
offset += current_chunk_size;
}
return(new MemoryStream(output));
}
public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var g2ent = entry as G2Entry;
if (null == g2ent)
return base.OpenEntry (arc, entry);
int entry_size = (int)g2ent.Size;
int offset = 0;
var decoders = new G2Scheme[4];
for (int i = 0; i < 4 && offset < entry_size; ++i)
{
decoders[i] = G2MetaScheme.CreateInstance (g2ent.Keys[i]);
if (null != decoders[i])
offset += EntryChunkSize;
}
var output = new byte[entry_size];
var input = new byte[EntryChunkSize];
int current_decoder = 0;
offset = 0;
while (offset < entry_size)
{
int current_chunk_size = Math.Min (EntryChunkSize, entry_size - offset);
if (null != decoders[current_decoder])
{
arc.File.View.Read (g2ent.Offset+offset, input, 0, (uint)current_chunk_size);
decoders[current_decoder].Decrypt (input, 0, output, offset, current_chunk_size);
}
else
{
arc.File.View.Read (g2ent.Offset+offset, output, offset, (uint)current_chunk_size);
}
current_decoder = (current_decoder + 1) & 3;
offset += current_chunk_size;
}
return new MemoryStream (output);
}