GARbro-mirror/ArcFormats/RiddleSoft/ArcPAC.cs

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//! \file ArcPAC.cs
//! \date Fri Feb 20 13:51:48 2015
//! \brief PAC archive implementation.
//
// Copyright (C) 2015 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.IO;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System;
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namespace GameRes.Formats.Riddle
{
[Export(typeof(ArchiveFormat))]
public class PacOpener : ArchiveFormat
{
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public override string Tag { get { return "PAC1"; } }
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public override string Description { get { return "Riddle Soft resource archive"; } }
public override uint Signature { get { return 0x31434150; } } // 'PAC1'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
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public PacOpener ()
{
Extensions = new string[] { "pac" };
}
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public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (4);
if (!IsSaneCount (count))
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return null;
uint index_offset = 8;
long base_offset = count*0x20 + 8;
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var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
string name = file.View.ReadString (index_offset, 0x10);
uint size = file.View.ReadUInt32 (index_offset+0x10);
var entry = new PackedEntry { Name = name };
if (name.EndsWith (".scp", StringComparison.InvariantCultureIgnoreCase))
{
entry.Type = "script";
entry.IsPacked = size > 12 && file.View.AsciiEqual (index_offset+0x14, "CMP1");
}
else
{
entry.Type = FormatCatalog.Instance.GetTypeFromName (name);
entry.IsPacked = false;
}
if (entry.IsPacked)
entry.UnpackedSize = file.View.ReadUInt32 (index_offset+0x18);
else
entry.UnpackedSize = size;
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entry.Offset = base_offset;
entry.Size = size;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
base_offset += size;
index_offset += 0x20;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var pentry = entry as PackedEntry;
if (null == pentry || !pentry.IsPacked
|| !arc.File.View.AsciiEqual (entry.Offset, "CMP1"))
return arc.File.CreateStream (entry.Offset, entry.Size);
int unpacked_size = arc.File.View.ReadInt32 (entry.Offset+4);
using (var input = arc.File.CreateStream (entry.Offset+12, entry.Size-12))
{
var reader = new CmpReader (input, (int)entry.Size, unpacked_size);
reader.Unpack();
return new MemoryStream (reader.Data);
}
}
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}
}