mirror of
https://github.com/crskycode/GARbro.git
synced 2024-12-29 06:14:13 +08:00
596 lines
20 KiB
C#
596 lines
20 KiB
C#
//! \file ArcView.cs
|
|
//! \date Mon Jul 07 10:31:10 2014
|
|
//! \brief Memory mapped view of gameres file.
|
|
//
|
|
// 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.IO.MemoryMappedFiles;
|
|
using System.Runtime.InteropServices;
|
|
using System.Text;
|
|
|
|
namespace GameRes
|
|
{
|
|
public static class Encodings
|
|
{
|
|
public static readonly Encoding cp932 = Encoding.GetEncoding (932);
|
|
|
|
public static Encoding WithFatalFallback (this Encoding enc)
|
|
{
|
|
var encoding = enc.Clone() as Encoding;
|
|
encoding.EncoderFallback = EncoderFallback.ExceptionFallback;
|
|
return encoding;
|
|
}
|
|
}
|
|
|
|
public static class StreamExtension
|
|
{
|
|
static public string ReadStringUntil (this Stream file, byte delim, Encoding enc)
|
|
{
|
|
byte[] buffer = new byte[16];
|
|
int size = 0;
|
|
for (;;)
|
|
{
|
|
int b = file.ReadByte ();
|
|
if (-1 == b || delim == b)
|
|
break;
|
|
if (buffer.Length == size)
|
|
{
|
|
Array.Resize (ref buffer, checked(size/2*3));
|
|
}
|
|
buffer[size++] = (byte)b;
|
|
}
|
|
return enc.GetString (buffer, 0, size);
|
|
}
|
|
|
|
static public string ReadCString (this Stream file, Encoding enc)
|
|
{
|
|
return ReadStringUntil (file, 0, enc);
|
|
}
|
|
|
|
static public string ReadCString (this Stream file)
|
|
{
|
|
return ReadStringUntil (file, 0, Encodings.cp932);
|
|
}
|
|
}
|
|
|
|
public static class MappedViewExtension
|
|
{
|
|
static public string ReadString (this MemoryMappedViewAccessor view, long offset, uint size, Encoding enc)
|
|
{
|
|
if (0 == size)
|
|
return string.Empty;
|
|
byte[] buffer = new byte[size];
|
|
uint n;
|
|
for (n = 0; n < size; ++n)
|
|
{
|
|
byte b = view.ReadByte (offset+n);
|
|
if (0 == b)
|
|
break;
|
|
buffer[n] = b;
|
|
}
|
|
return enc.GetString (buffer, 0, (int)n);
|
|
}
|
|
|
|
static public string ReadString (this MemoryMappedViewAccessor view, long offset, uint size)
|
|
{
|
|
return ReadString (view, offset, size, Encodings.cp932);
|
|
}
|
|
|
|
unsafe public static byte* GetPointer (this MemoryMappedViewAccessor view, long offset)
|
|
{
|
|
var num = offset % info.dwAllocationGranularity;
|
|
byte* ptr = null;
|
|
view.SafeMemoryMappedViewHandle.AcquirePointer (ref ptr);
|
|
ptr += num;
|
|
return ptr;
|
|
}
|
|
|
|
[DllImport("kernel32.dll", SetLastError = true)]
|
|
internal static extern void GetSystemInfo (ref SYSTEM_INFO lpSystemInfo);
|
|
|
|
internal struct SYSTEM_INFO
|
|
{
|
|
internal int dwOemId;
|
|
internal int dwPageSize;
|
|
internal IntPtr lpMinimumApplicationAddress;
|
|
internal IntPtr lpMaximumApplicationAddress;
|
|
internal IntPtr dwActiveProcessorMask;
|
|
internal int dwNumberOfProcessors;
|
|
internal int dwProcessorType;
|
|
internal int dwAllocationGranularity;
|
|
internal short wProcessorLevel;
|
|
internal short wProcessorRevision;
|
|
}
|
|
|
|
static SYSTEM_INFO info;
|
|
|
|
static MappedViewExtension()
|
|
{
|
|
GetSystemInfo (ref info);
|
|
}
|
|
}
|
|
|
|
public class ArcView : IDisposable
|
|
{
|
|
private MemoryMappedFile m_map;
|
|
|
|
public const long PageSize = 4096;
|
|
public long MaxOffset { get; private set; }
|
|
public Frame View { get; private set; }
|
|
public string Name { get; private set; }
|
|
|
|
public ArcView (string name)
|
|
{
|
|
using (var fs = new FileStream(name, FileMode.Open, FileAccess.Read, FileShare.Read))
|
|
{
|
|
Name = name;
|
|
MaxOffset = fs.Length;
|
|
InitFromFileStream (fs, 0);
|
|
}
|
|
}
|
|
|
|
public ArcView (Stream input, string name, uint length)
|
|
{
|
|
Name = name;
|
|
MaxOffset = length;
|
|
if (input is FileStream)
|
|
InitFromFileStream (input as FileStream, length);
|
|
else
|
|
InitFromStream (input, length);
|
|
}
|
|
|
|
private void InitFromFileStream (FileStream fs, uint length)
|
|
{
|
|
m_map = MemoryMappedFile.CreateFromFile (fs, null, length,
|
|
MemoryMappedFileAccess.Read, null, HandleInheritability.None, true);
|
|
try {
|
|
View = new Frame (this);
|
|
} catch {
|
|
m_map.Dispose(); // dispose on error only
|
|
throw;
|
|
}
|
|
}
|
|
|
|
private void InitFromStream (Stream input, uint length)
|
|
{
|
|
m_map = MemoryMappedFile.CreateNew (null, length, MemoryMappedFileAccess.ReadWrite,
|
|
MemoryMappedFileOptions.None, null, HandleInheritability.None);
|
|
try
|
|
{
|
|
using (var view = m_map.CreateViewAccessor (0, length, MemoryMappedFileAccess.Write))
|
|
{
|
|
var buffer = new byte[81920];
|
|
unsafe
|
|
{
|
|
byte* ptr = view.GetPointer (0);
|
|
try
|
|
{
|
|
uint total = 0;
|
|
while (total < length)
|
|
{
|
|
int read = input.Read (buffer, 0, buffer.Length);
|
|
if (0 == read)
|
|
break;
|
|
read = (int)Math.Min (read, length-total);
|
|
Marshal.Copy (buffer, 0, (IntPtr)(ptr+total), read);
|
|
total += (uint)read;
|
|
}
|
|
MaxOffset = total;
|
|
}
|
|
finally
|
|
{
|
|
view.SafeMemoryMappedViewHandle.ReleasePointer();
|
|
}
|
|
}
|
|
}
|
|
View = new Frame (this);
|
|
}
|
|
catch
|
|
{
|
|
m_map.Dispose();
|
|
throw;
|
|
}
|
|
}
|
|
|
|
public Frame CreateFrame ()
|
|
{
|
|
return new Frame (View);
|
|
}
|
|
|
|
public ArcStream CreateStream ()
|
|
{
|
|
return new ArcStream (this);
|
|
}
|
|
|
|
public ArcStream CreateStream (long offset)
|
|
{
|
|
var size = this.MaxOffset - offset;
|
|
if (size > uint.MaxValue)
|
|
throw new ArgumentOutOfRangeException ("Too large memory mapped stream");
|
|
return new ArcStream (this, offset, (uint)size);
|
|
}
|
|
|
|
public ArcStream CreateStream (long offset, uint size)
|
|
{
|
|
return new ArcStream (this, offset, size);
|
|
}
|
|
|
|
public MemoryMappedViewAccessor CreateViewAccessor (long offset, uint size)
|
|
{
|
|
return m_map.CreateViewAccessor (offset, size, MemoryMappedFileAccess.Read);
|
|
}
|
|
|
|
#region IDisposable Members
|
|
bool disposed = false;
|
|
|
|
public void Dispose ()
|
|
{
|
|
Dispose (true);
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
|
|
protected virtual void Dispose (bool disposing)
|
|
{
|
|
if (!disposed)
|
|
{
|
|
if (disposing)
|
|
{
|
|
View.Dispose();
|
|
m_map.Dispose();
|
|
}
|
|
disposed = true;
|
|
m_map = null;
|
|
}
|
|
}
|
|
#endregion
|
|
|
|
public class Frame : IDisposable
|
|
{
|
|
private ArcView m_arc;
|
|
private MemoryMappedViewAccessor m_view;
|
|
private long m_offset;
|
|
private uint m_size;
|
|
|
|
public long Offset { get { return m_offset; } }
|
|
public uint Reserved { get { return m_size; } }
|
|
|
|
public Frame (ArcView arc)
|
|
{
|
|
m_arc = arc;
|
|
m_offset = 0;
|
|
m_size = (uint)Math.Min (ArcView.PageSize, m_arc.MaxOffset);
|
|
m_view = m_arc.CreateViewAccessor (m_offset, m_size);
|
|
}
|
|
|
|
public Frame (Frame other)
|
|
{
|
|
m_arc = other.m_arc;
|
|
m_offset = 0;
|
|
m_size = (uint)Math.Min (ArcView.PageSize, m_arc.MaxOffset);
|
|
m_view = m_arc.CreateViewAccessor (m_offset, m_size);
|
|
}
|
|
|
|
public Frame (ArcView arc, long offset, uint size)
|
|
{
|
|
m_arc = arc;
|
|
m_offset = Math.Min (offset, m_arc.MaxOffset);
|
|
m_size = (uint)Math.Min (size, m_arc.MaxOffset-m_offset);
|
|
m_view = m_arc.CreateViewAccessor (m_offset, m_size);
|
|
}
|
|
|
|
public uint Reserve (long offset, uint size)
|
|
{
|
|
if (offset < m_offset || offset+size > m_offset+m_size)
|
|
{
|
|
if (offset > m_arc.MaxOffset)
|
|
throw new ArgumentOutOfRangeException ("offset", "Too large offset specified for memory mapped file view.");
|
|
if (size < ArcView.PageSize)
|
|
size = (uint)ArcView.PageSize;
|
|
if (size > m_arc.MaxOffset-offset)
|
|
size = (uint)(m_arc.MaxOffset-offset);
|
|
var old_view = m_view;
|
|
m_view = m_arc.CreateViewAccessor (offset, size);
|
|
old_view.Dispose();
|
|
m_offset = offset;
|
|
m_size = size;
|
|
}
|
|
return (uint)(m_offset + m_size - offset);
|
|
}
|
|
|
|
public bool AsciiEqual (long offset, string data)
|
|
{
|
|
if (Reserve (offset, (uint)data.Length) < (uint)data.Length)
|
|
return false;
|
|
unsafe
|
|
{
|
|
byte* ptr = m_view.GetPointer (m_offset);
|
|
try {
|
|
for (int i = 0; i < data.Length; ++i)
|
|
{
|
|
if (ptr[offset-m_offset+i] != data[i])
|
|
return false;
|
|
}
|
|
} finally {
|
|
m_view.SafeMemoryMappedViewHandle.ReleasePointer();
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
public int Read (long offset, byte[] buf, int buf_offset, uint count)
|
|
{
|
|
// supposedly faster version of
|
|
//Reserve (offset, count);
|
|
//return m_view.ReadArray (offset-m_offset, buf, buf_offset, (int)count);
|
|
|
|
if (buf == null)
|
|
throw new ArgumentNullException ("buf", "Buffer cannot be null.");
|
|
if (buf_offset < 0)
|
|
throw new ArgumentOutOfRangeException ("buf_offset", "Buffer offset should be non-negative.");
|
|
|
|
int total = (int)Math.Min (Reserve (offset, count), count);
|
|
if (buf.Length - buf_offset < total)
|
|
throw new ArgumentException ("Buffer offset and length are out of bounds.");
|
|
|
|
unsafe
|
|
{
|
|
byte* ptr = m_view.GetPointer (m_offset);
|
|
try {
|
|
Marshal.Copy ((IntPtr)(ptr+(offset-m_offset)), buf, buf_offset, total);
|
|
} finally {
|
|
m_view.SafeMemoryMappedViewHandle.ReleasePointer();
|
|
}
|
|
}
|
|
return total;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Read <paramref name="count"/> bytes starting from <paramref name="offset"/> into byte array and return that array.
|
|
/// Returned array could be less than <paramref name="count"/> bytes length if end of the mapped file was reached.
|
|
/// </summary>
|
|
public byte[] ReadBytes (long offset, uint count)
|
|
{
|
|
count = Math.Min (count, Reserve (offset, count));
|
|
var data = new byte[count];
|
|
Read (offset, data, 0, count);
|
|
return data;
|
|
}
|
|
|
|
public byte ReadByte (long offset)
|
|
{
|
|
Reserve (offset, 1);
|
|
return m_view.ReadByte (offset-m_offset);
|
|
}
|
|
|
|
public sbyte ReadSByte (long offset)
|
|
{
|
|
Reserve (offset, 1);
|
|
return m_view.ReadSByte (offset-m_offset);
|
|
}
|
|
|
|
public ushort ReadUInt16 (long offset)
|
|
{
|
|
Reserve (offset, 2);
|
|
return m_view.ReadUInt16 (offset-m_offset);
|
|
}
|
|
|
|
public short ReadInt16 (long offset)
|
|
{
|
|
Reserve (offset, 2);
|
|
return m_view.ReadInt16 (offset-m_offset);
|
|
}
|
|
|
|
public uint ReadUInt32 (long offset)
|
|
{
|
|
Reserve (offset, 4);
|
|
return m_view.ReadUInt32 (offset-m_offset);
|
|
}
|
|
|
|
public int ReadInt32 (long offset)
|
|
{
|
|
Reserve (offset, 4);
|
|
return m_view.ReadInt32 (offset-m_offset);
|
|
}
|
|
|
|
public ulong ReadUInt64 (long offset)
|
|
{
|
|
Reserve (offset, 8);
|
|
return m_view.ReadUInt64 (offset-m_offset);
|
|
}
|
|
|
|
public long ReadInt64 (long offset)
|
|
{
|
|
Reserve (offset, 8);
|
|
return m_view.ReadInt64 (offset-m_offset);
|
|
}
|
|
|
|
public string ReadString (long offset, uint size, Encoding enc)
|
|
{
|
|
size = Math.Min (size, Reserve (offset, size));
|
|
return m_view.ReadString (offset-m_offset, size, enc);
|
|
}
|
|
|
|
public string ReadString (long offset, uint size)
|
|
{
|
|
return ReadString (offset, size, Encodings.cp932);
|
|
}
|
|
|
|
#region IDisposable Members
|
|
bool disposed = false;
|
|
|
|
public void Dispose ()
|
|
{
|
|
Dispose (true);
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
|
|
protected virtual void Dispose (bool disposing)
|
|
{
|
|
if (!disposed)
|
|
{
|
|
if (disposing)
|
|
{
|
|
m_view.Dispose();
|
|
}
|
|
m_arc = null;
|
|
m_view = null;
|
|
disposed = true;
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
|
|
public class ArcStream : System.IO.Stream
|
|
{
|
|
private Frame m_view;
|
|
private long m_start;
|
|
private uint m_size;
|
|
private long m_position;
|
|
|
|
public override bool CanRead { get { return !disposed; } }
|
|
public override bool CanSeek { get { return !disposed; } }
|
|
public override bool CanWrite { get { return false; } }
|
|
public override long Length { get { return m_size; } }
|
|
public override long Position
|
|
{
|
|
get { return m_position; }
|
|
set { m_position = Math.Max (value, 0); }
|
|
}
|
|
|
|
public ArcStream (ArcView file)
|
|
{
|
|
m_view = file.CreateFrame();
|
|
m_start = 0;
|
|
m_size = (uint)Math.Min (file.MaxOffset, uint.MaxValue);
|
|
m_position = 0;
|
|
}
|
|
|
|
public ArcStream (Frame view)
|
|
{
|
|
m_view = view;
|
|
m_start = m_view.Offset;
|
|
m_size = m_view.Reserved;
|
|
m_position = 0;
|
|
}
|
|
|
|
public ArcStream (ArcView file, long offset, uint size)
|
|
: this (new Frame (file, offset, size))
|
|
{
|
|
}
|
|
|
|
public ArcStream (Frame view, long offset, uint size)
|
|
{
|
|
m_view = view;
|
|
m_start = offset;
|
|
m_size = Math.Min (size, m_view.Reserve (offset, size));
|
|
m_position = 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Read stream signature (first 4 bytes) without altering current read position.
|
|
/// </summary>
|
|
public uint ReadSignature ()
|
|
{
|
|
return m_view.ReadUInt32 (m_start);
|
|
}
|
|
|
|
#region System.IO.Stream methods
|
|
public override void Flush()
|
|
{
|
|
}
|
|
|
|
public override long Seek (long offset, SeekOrigin origin)
|
|
{
|
|
switch (origin)
|
|
{
|
|
case SeekOrigin.Begin: m_position = offset; break;
|
|
case SeekOrigin.Current: m_position += offset; break;
|
|
case SeekOrigin.End: m_position = m_size + offset; break;
|
|
}
|
|
if (m_position < 0)
|
|
m_position = 0;
|
|
return m_position;
|
|
}
|
|
|
|
public override void SetLength (long length)
|
|
{
|
|
throw new NotSupportedException ("GameRes.ArcStream.SetLength method is not supported");
|
|
}
|
|
|
|
public override int Read (byte[] buffer, int offset, int count)
|
|
{
|
|
if (m_position >= m_size)
|
|
return 0;
|
|
count = (int)Math.Min (count, m_size - m_position);
|
|
int read = m_view.Read (m_start + m_position, buffer, offset, (uint)count);
|
|
m_position += read;
|
|
return read;
|
|
}
|
|
|
|
public override int ReadByte ()
|
|
{
|
|
if (m_position >= m_size)
|
|
return -1;
|
|
byte b = m_view.ReadByte (m_start+m_position);
|
|
++m_position;
|
|
return b;
|
|
}
|
|
|
|
public override void Write (byte[] buffer, int offset, int count)
|
|
{
|
|
throw new NotSupportedException("GameRes.ArcStream.Write method is not supported");
|
|
}
|
|
|
|
public override void WriteByte (byte value)
|
|
{
|
|
throw new NotSupportedException("GameRes.ArcStream.WriteByte method is not supported");
|
|
}
|
|
#endregion
|
|
|
|
#region IDisposable Members
|
|
bool disposed = false;
|
|
protected override void Dispose (bool disposing)
|
|
{
|
|
if (!disposed)
|
|
{
|
|
if (disposing)
|
|
{
|
|
m_view.Dispose();
|
|
}
|
|
disposed = true;
|
|
base.Dispose (disposing);
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
|
|
public class Reader : System.IO.BinaryReader
|
|
{
|
|
public Reader (Stream stream) : base (stream, Encoding.ASCII, true)
|
|
{
|
|
}
|
|
}
|
|
}
|
|
}
|