GARbro-mirror/ArcFormats/Circus/ArcCRM.cs

99 lines
3.7 KiB
C#

//! \file ArcCRM.cs
//! \date Wed Oct 12 14:15:11 2016
//! \brief Circus resource archive.
//
// Copyright (C) 2016 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
namespace GameRes.Formats.Circus
{
internal class CrmArchive : ArcFile
{
readonly IDictionary<uint, Entry> OffsetMap;
public CrmArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, IDictionary<uint, Entry> offset_map)
: base (arc, impl, dir)
{
OffsetMap = offset_map;
}
internal Stream OpenByOffset (uint offset)
{
Entry entry;
if (!OffsetMap.TryGetValue (offset, out entry))
throw new FileNotFoundException();
return OpenEntry (entry);
}
}
[Export(typeof(ArchiveFormat))]
public class CrmOpener : ArchiveFormat
{
public override string Tag { get { return "CRM"; } }
public override string Description { get { return "Circus image archive"; } }
public override uint Signature { get { return 0x42585243; } } // 'CRXB'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (8);
if (!IsSaneCount (count))
return null;
var offset_map = new SortedDictionary<uint, Entry>();
int index_offset = 0x10;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
uint offset = file.View.ReadUInt32 (index_offset);
var name = file.View.ReadString (index_offset+8, 0x18);
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = offset;
dir.Add (entry);
offset_map[offset] = entry;
index_offset += 0x20;
}
using (var iterator = offset_map.GetEnumerator())
{
if (iterator.MoveNext())
{
for (;;)
{
var entry = iterator.Current.Value;
if (!iterator.MoveNext())
{
entry.Size = (uint)(file.MaxOffset - entry.Offset);
break;
}
entry.Size = (uint)(iterator.Current.Key - entry.Offset);
}
}
}
return new CrmArchive (file, this, dir, offset_map);
}
}
}