GARbro-mirror/GameRes/GameRes.cs

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//! \file GameRes.cs
//! \date Mon Jun 30 20:12:13 2014
//! \brief game resources browser.
//
// Copyright (C) 2014-2015 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;
using System.IO;
using System.Collections.Generic;
using GameRes.Strings;
namespace GameRes
{
/// <summary>
/// Basic filesystem entry.
/// </summary>
public class Entry
{
public virtual string Name { get; set; }
public virtual string Type { get; set; }
public long Offset { get; set; }
public uint Size { get; set; }
public Entry ()
{
Type = "";
Offset = -1;
}
/// <summary>
/// Check whether entry lies within specified file bound.
/// </summary>
public bool CheckPlacement (long max_offset)
{
return Offset < max_offset && Size <= max_offset && Offset <= max_offset - Size;
}
}
public class PackedEntry : Entry
{
public uint UnpackedSize { get; set; }
public bool IsPacked { get; set; }
}
public abstract class IResource
{
/// <summary>Short tag sticked to resource (usually filename extension)</summary>
public abstract string Tag { get; }
/// <summary>Resource description (its source/inventor)</summary>
public abstract string Description { get; }
/// <summary>Resource type (image/archive/script)</summary>
public abstract string Type { get; }
/// <summary>First 4 bytes of the resource file as little-endian 32-bit integer,
/// or zero if it could vary.</summary>
public abstract uint Signature { get; }
/// <summary>Whether resource creation is supported by implementation.</summary>
public virtual bool CanWrite { get { return false; } }
/// <summary>Signatures peculiar to the resource (the one above is also included here).</summary>
public IEnumerable<uint> Signatures { get; protected set; }
/// <summary>Filename extensions peculiar to the resource.</summary>
public IEnumerable<string> Extensions { get; protected set; }
/// <summary>Resource settings suitable for serialization.</summary>
public virtual ResourceScheme Scheme { get; set; }
/// <summary>
/// Create empty Entry that corresponds to implemented resource.
/// </summary>
public EntryType Create<EntryType> () where EntryType : Entry, new()
{
return new EntryType { Type = this.Type };
}
protected IResource ()
{
Extensions = new string[] { GetDefaultExtension() };
Signatures = new uint[] { this.Signature };
}
protected string GetDefaultExtension ()
{
var ext = Tag.ToLowerInvariant();
int slash = ext.IndexOf ('/');
if (slash != -1)
ext = ext.Substring (0, slash);
return ext;
}
public virtual ResourceOptions GetDefaultOptions ()
{
return null;
}
public virtual ResourceOptions GetOptions (object widget)
{
return GetDefaultOptions();
}
public virtual object GetCreationWidget ()
{
return null;
}
public virtual object GetAccessWidget ()
{
return null;
}
protected OptType GetOptions<OptType> (ResourceOptions res_options) where OptType : ResourceOptions
{
var options = res_options as OptType;
if (null == options)
options = this.GetDefaultOptions() as OptType;
return options;
}
protected OptType Query<OptType> (string notice) where OptType : ResourceOptions
{
var args = new ParametersRequestEventArgs { Notice = notice };
FormatCatalog.Instance.InvokeParametersRequest (this, args);
if (!args.InputResult)
throw new OperationCanceledException();
return GetOptions<OptType> (args.Options);
}
}
public class ResourceOptions
{
}
[Serializable]
public class ResourceScheme
{
}
public enum ArchiveOperation
{
Abort,
Skip,
Continue,
}
public delegate ArchiveOperation EntryCallback (int num, Entry entry, string description);
public abstract class ArchiveFormat : IResource
{
public override string Type { get { return "archive"; } }
/// <summary>
/// Whether archive file system could contain subdirectories.
/// </summary>
public abstract bool IsHierarchic { get; }
public abstract ArcFile TryOpen (ArcView view);
/// <summary>
/// Extract file referenced by <paramref name="entry"/> into current directory.
/// </summary>
public void Extract (ArcFile file, Entry entry)
{
using (var input = OpenEntry (file, entry))
using (var output = CreateFile (entry.Name))
input.CopyTo (output);
}
/// <summary>
/// Open file referenced by <paramref name="entry"/> as Stream.
/// </summary>
public virtual Stream OpenEntry (ArcFile arc, Entry entry)
{
return arc.File.CreateStream (entry.Offset, entry.Size, entry.Name);
}
/// <summary>
/// Open <paramref name="entry"> as image. Throws InvalidFormatException if entry is not an image.
/// </summary>
public virtual IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
var input = arc.OpenBinaryEntry (entry);
return new ImageFormatDecoder (input);
}
/// <summary>
/// Create file corresponding to <paramref name="entry"/> in current directory and open it
/// for writing. Overwrites existing file, if any.
/// </summary>
static public Stream CreateFile (string filename)
{
filename = CreatePath (filename);
if (File.Exists (filename))
{
// query somehow whether to overwrite existing file or not.
}
return File.Create (filename);
}
static public string CreatePath (string filename)
{
string dir = Path.GetDirectoryName (filename);
if (!string.IsNullOrEmpty (dir)) // check for malformed filenames
{
string root = Path.GetPathRoot (dir);
if (!string.IsNullOrEmpty (root))
{
dir = dir.Substring (root.Length); // strip root
}
string cwd = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar;
dir = Path.GetFullPath (dir);
filename = Path.GetFileName (filename);
// check whether filename would reside within current directory
if (dir.StartsWith (cwd, StringComparison.OrdinalIgnoreCase))
{
// path looks legit, create it
Directory.CreateDirectory (dir);
filename = Path.Combine (dir, filename);
}
}
return filename;
}
/// <summary>
/// Create resource within stream <paramref name="file"/> containing entries from the
/// supplied <paramref name="list"/> and applying necessary <paramref name="options"/>.
/// </summary>
public virtual void Create (Stream file, IEnumerable<Entry> list, ResourceOptions options = null,
EntryCallback callback = null)
{
throw new NotImplementedException ("ArchiveFormat.Create is not implemented");
}
public static bool IsSaneCount (int count)
{
return count > 0 && count < 0x20000;
}
}
public delegate void ParametersRequestEventHandler (object sender, ParametersRequestEventArgs e);
public class ParametersRequestEventArgs : EventArgs
{
/// <summary>
/// String describing request nature (encryption key etc).
/// </summary>
public string Notice { get; set; }
/// <summary>
/// Return value from ShowDialog()
/// </summary>
public bool InputResult { get; set; }
/// <summary>
/// Archive-specific options set by InputWidget.
/// </summary>
public ResourceOptions Options { get; set; }
}
public class OverwriteEventArgs : EventArgs
{
public string Filename { get; set; }
public bool Overwrite { get; set; }
}
public class InvalidFormatException : FileFormatException
{
public InvalidFormatException() : base(garStrings.MsgInvalidFormat) { }
public InvalidFormatException (string msg) : base (msg) { }
}
public class UnknownEncryptionScheme : Exception
{
public UnknownEncryptionScheme() : base(garStrings.MsgUnknownEncryption) { }
public UnknownEncryptionScheme (string msg) : base (msg) { }
}
public class InvalidEncryptionScheme : Exception
{
public InvalidEncryptionScheme() : base(garStrings.MsgInvalidEncryption) { }
public InvalidEncryptionScheme (string msg) : base (msg) { }
}
public class FileSizeException : Exception
{
public FileSizeException () : base (garStrings.MsgFileTooLarge) { }
public FileSizeException (string msg) : base (msg) { }
}
public class InvalidFileName : Exception
{
public string FileName { get; set; }
public InvalidFileName (string filename)
: this (filename, garStrings.MsgInvalidFileName)
{
}
public InvalidFileName (string filename, string message)
: base (message)
{
FileName = filename;
}
public InvalidFileName (string filename, Exception X)
: this (filename, garStrings.MsgInvalidFileName, X)
{
}
public InvalidFileName (string filename, string message, Exception X)
: base (message, X)
{
FileName = filename;
}
}
}