690 lines
19 KiB
C#
690 lines
19 KiB
C#
//
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// System.Resources.ResourceReader.cs
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//
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// Authors:
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// Duncan Mak <duncan@ximian.com>
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// Nick Drochak <ndrochak@gol.com>
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// Dick Porter <dick@ximian.com>
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// Marek Safar <marek.safar@seznam.cz>
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// Atsushi Enomoto <atsushi@ximian.com>
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// Larry Ewing <lewing@novell.com>
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//
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// (C) 2001, 2002 Ximian Inc, http://www.ximian.com
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// Copyright (C) 2004-2005,2007-2008 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Collections;
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using System.Resources;
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using System.IO;
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using System.Text;
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using System.Runtime.InteropServices;
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using System.Runtime.Serialization;
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using System.Runtime.Serialization.Formatters.Binary;
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using System.Security.Permissions;
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using System.Collections.Generic;
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namespace System.Resources
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{
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internal enum PredefinedResourceType
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{
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Null = 0,
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String = 1,
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Bool = 2,
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Char = 3,
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Byte = 4,
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SByte = 5,
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Int16 = 6,
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UInt16 = 7,
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Int32 = 8,
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UInt32 = 9,
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Int64 = 10,
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UInt64 = 11,
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Single = 12,
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Double = 13,
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Decimal = 14,
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DateTime = 15,
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TimeSpan = 16,
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ByteArray = 32,
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Stream = 33,
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FistCustom = 64
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}
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[System.Runtime.InteropServices.ComVisible (true)]
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public sealed class ResourceReader : IResourceReader, IEnumerable, IDisposable
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{
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struct ResourceInfo
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{
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public readonly long ValuePosition;
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public readonly string ResourceName;
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public readonly int TypeIndex;
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public ResourceInfo (string resourceName, long valuePosition, int type_index)
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{
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ValuePosition = valuePosition;
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ResourceName = resourceName;
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TypeIndex = type_index;
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}
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}
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struct ResourceCacheItem
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{
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public readonly string ResourceName;
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public readonly object ResourceValue;
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public ResourceCacheItem (string name, object value)
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{
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ResourceName = name;
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ResourceValue = value;
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}
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}
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unsafe class HGlobalUnmanagedMemoryStream : UnmanagedMemoryStream
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{
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IntPtr ptr;
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public HGlobalUnmanagedMemoryStream (byte* pointer, long length, IntPtr ptr)
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: base (pointer, length, length, FileAccess.ReadWrite)
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{
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this.ptr = ptr;
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}
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protected override void Dispose (bool disposing)
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{
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if (!closed) {
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Marshal.FreeHGlobal (ptr);
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}
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base.Dispose (disposing);
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}
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}
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BinaryReader reader;
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object readerLock = new object ();
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IFormatter formatter;
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internal int resourceCount = 0;
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int typeCount = 0;
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string[] typeNames;
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int[] hashes;
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ResourceInfo[] infos;
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int dataSectionOffset;
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long nameSectionOffset;
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int resource_ver;
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ResourceCacheItem[] cache;
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object cache_lock = new object ();
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// Constructors
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[SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)]
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public ResourceReader (Stream stream)
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{
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if (stream == null)
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throw new ArgumentNullException ("stream");
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if (!stream.CanRead)
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throw new ArgumentException ("Stream was not readable.");
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reader = new BinaryReader(stream, Encoding.UTF8);
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formatter = new BinaryFormatter(null, new StreamingContext(StreamingContextStates.File|StreamingContextStates.Persistence));
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ReadHeaders();
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}
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public ResourceReader (string fileName)
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{
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reader = new BinaryReader (new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read));
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formatter = new BinaryFormatter(null, new StreamingContext(StreamingContextStates.File|StreamingContextStates.Persistence));
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ReadHeaders();
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}
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/* Read the ResourceManager header and the
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* ResourceReader header.
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*/
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private void ReadHeaders()
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{
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try {
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int manager_magic = reader.ReadInt32();
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if(manager_magic != ResourceManager.MagicNumber)
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throw new ArgumentException(String.Format ("Stream is not a valid .resources file, magic=0x{0:x}", manager_magic));
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int manager_ver = reader.ReadInt32();
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int manager_len = reader.ReadInt32();
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/* We know how long the header is, even if
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* the version number is too new
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*/
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if(manager_ver > ResourceManager.HeaderVersionNumber) {
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reader.BaseStream.Seek(manager_len, SeekOrigin.Current);
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} else {
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string reader_class=reader.ReadString();
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if(!reader_class.StartsWith("System.Resources.ResourceReader")) {
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throw new NotSupportedException("This .resources file requires reader class " + reader_class);
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}
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string set_class=reader.ReadString();
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if(!set_class.StartsWith(typeof(ResourceSet).FullName) && !set_class.StartsWith("System.Resources.RuntimeResourceSet")) {
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throw new NotSupportedException("This .resources file requires set class " + set_class);
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}
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}
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/* Now read the ResourceReader header */
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resource_ver = reader.ReadInt32();
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if(resource_ver != 1 && resource_ver != 2) {
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throw new NotSupportedException("This .resources file requires unsupported set class version: " + resource_ver.ToString());
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}
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resourceCount = reader.ReadInt32();
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typeCount = reader.ReadInt32();
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typeNames=new string[typeCount];
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for(int i=0; i<typeCount; i++) {
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typeNames[i]=reader.ReadString();
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}
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/* There are between 0 and 7 bytes of
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* padding here, consisting of the
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* letters PAD. The next item (Hash
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* values for each resource name) need
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* to be aligned on an 8-byte
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* boundary.
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*/
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int pad_align=(int)(reader.BaseStream.Position & 7);
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int pad_chars=0;
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if(pad_align!=0) {
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pad_chars=8-pad_align;
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}
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for(int i=0; i<pad_chars; i++) {
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byte pad_byte=reader.ReadByte();
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if(pad_byte!="PAD"[i%3]) {
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throw new ArgumentException("Malformed .resources file (padding values incorrect)");
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}
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}
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/* Read in the hash values for each
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* resource name. These can be used
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* by ResourceSet (calling internal
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* methods) to do a fast compare on
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* resource names without doing
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* expensive string compares (but we
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* dont do that yet, so far we only
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* implement the Enumerator interface)
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*/
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hashes=new int[resourceCount];
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for(int i=0; i<resourceCount; i++) {
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hashes[i]=reader.ReadInt32();
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}
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/* Read in the virtual offsets for
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* each resource name
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*/
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long[] positions = new long [resourceCount];
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for(int i = 0; i < resourceCount; i++)
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positions [i] = reader.ReadInt32();
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dataSectionOffset = reader.ReadInt32();
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nameSectionOffset = reader.BaseStream.Position;
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long origPosition = reader.BaseStream.Position;
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infos = new ResourceInfo [resourceCount];
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for (int i = 0; i < resourceCount; i++)
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CreateResourceInfo (positions [i], ref infos [i]);
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reader.BaseStream.Seek (origPosition, SeekOrigin.Begin);
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positions = null;
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} catch(EndOfStreamException e) {
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throw new ArgumentException("Stream is not a valid .resources file! It was possibly truncated.", e);
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}
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}
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void CreateResourceInfo (long position, ref ResourceInfo info)
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{
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long pos = position + nameSectionOffset;
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reader.BaseStream.Seek (pos, SeekOrigin.Begin);
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// Resource name
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int len = Read7BitEncodedInt ();
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byte[] str = new byte [len];
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reader.Read (str, 0, len);
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string resourceName = Encoding.Unicode.GetString (str);
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long data_offset = reader.ReadInt32 () + dataSectionOffset;
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reader.BaseStream.Seek (data_offset, SeekOrigin.Begin);
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int type_index = Read7BitEncodedInt ();
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info = new ResourceInfo (resourceName, reader.BaseStream.Position, type_index);
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}
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/* Cut and pasted from BinaryReader, because it's
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* 'protected' there
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*/
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private int Read7BitEncodedInt() {
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int ret = 0;
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int shift = 0;
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byte b;
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do {
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b = reader.ReadByte();
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ret = ret | ((b & 0x7f) << shift);
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shift += 7;
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} while ((b & 0x80) == 0x80);
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return ret;
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}
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object ReadValueVer2 (int type_index)
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{
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switch ((PredefinedResourceType)type_index)
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{
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case PredefinedResourceType.Null:
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return null;
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case PredefinedResourceType.String:
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return reader.ReadString();
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case PredefinedResourceType.Bool:
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return reader.ReadBoolean ();
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case PredefinedResourceType.Char:
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return (char)reader.ReadUInt16();
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case PredefinedResourceType.Byte:
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return reader.ReadByte();
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case PredefinedResourceType.SByte:
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return reader.ReadSByte();
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case PredefinedResourceType.Int16:
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return reader.ReadInt16();
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case PredefinedResourceType.UInt16:
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return reader.ReadUInt16();
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case PredefinedResourceType.Int32:
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return reader.ReadInt32();
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case PredefinedResourceType.UInt32:
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return reader.ReadUInt32();
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case PredefinedResourceType.Int64:
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return reader.ReadInt64();
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case PredefinedResourceType.UInt64:
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return reader.ReadUInt64();
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case PredefinedResourceType.Single:
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return reader.ReadSingle();
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case PredefinedResourceType.Double:
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return reader.ReadDouble();
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case PredefinedResourceType.Decimal:
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return reader.ReadDecimal();
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case PredefinedResourceType.DateTime:
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return new DateTime(reader.ReadInt64());
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case PredefinedResourceType.TimeSpan:
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return new TimeSpan(reader.ReadInt64());
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case PredefinedResourceType.ByteArray:
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return reader.ReadBytes (reader.ReadInt32 ());
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case PredefinedResourceType.Stream:
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// FIXME: create pinned UnmanagedMemoryStream for efficiency.
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byte [] bytes = new byte [reader.ReadUInt32 ()];
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reader.Read (bytes, 0, bytes.Length);
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return new MemoryStream (bytes);
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}
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type_index -= (int)PredefinedResourceType.FistCustom;
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return ReadNonPredefinedValue (Type.GetType (typeNames[type_index], true));
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}
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object ReadValueVer1 (Type type)
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{
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// The most common first
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if (type==typeof(String))
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return reader.ReadString();
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if (type==typeof(Int32))
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return reader.ReadInt32();
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if (type==typeof(Byte))
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return(reader.ReadByte());
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if (type==typeof(Double))
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return(reader.ReadDouble());
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if (type==typeof(Int16))
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return(reader.ReadInt16());
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if (type==typeof(Int64))
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return(reader.ReadInt64());
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if (type==typeof(SByte))
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return(reader.ReadSByte());
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if (type==typeof(Single))
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return(reader.ReadSingle());
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if (type==typeof(TimeSpan))
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return(new TimeSpan(reader.ReadInt64()));
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if (type==typeof(UInt16))
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return(reader.ReadUInt16());
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if (type==typeof(UInt32))
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return(reader.ReadUInt32());
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if (type==typeof(UInt64))
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return(reader.ReadUInt64());
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if (type==typeof(Decimal))
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return(reader.ReadDecimal());
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if (type==typeof(DateTime))
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return(new DateTime(reader.ReadInt64()));
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return ReadNonPredefinedValue(type);
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}
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// TODO: Add security checks
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object ReadNonPredefinedValue (Type exp_type)
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{
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object obj=formatter.Deserialize(reader.BaseStream);
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if(obj.GetType() != exp_type) {
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/* We got a bogus
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* object. This
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* exception is the
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* best match I could
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* find. (.net seems
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* to throw
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* BadImageFormatException,
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* which the docs
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* state is used when
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* file or dll images
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* cant be loaded by
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* the runtime.)
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*/
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throw new InvalidOperationException("Deserialized object is wrong type");
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}
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return obj;
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}
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void LoadResourceValues (ResourceCacheItem[] store)
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{
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ResourceInfo ri;
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object value;
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lock (readerLock) {
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for (int i = 0; i < resourceCount; i++) {
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ri = infos [i];
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if (ri.TypeIndex == -1) {
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store [i] = new ResourceCacheItem (ri.ResourceName, null);
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continue;
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}
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reader.BaseStream.Seek (ri.ValuePosition, SeekOrigin.Begin);
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if (resource_ver == 2)
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value = ReadValueVer2 (ri.TypeIndex);
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else
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value = ReadValueVer1 (Type.GetType (typeNames [ri.TypeIndex], true));
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store [i] = new ResourceCacheItem (ri.ResourceName, value);
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}
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}
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}
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internal UnmanagedMemoryStream ResourceValueAsStream (string name, int index)
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{
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ResourceInfo ri = infos [index];
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if ((PredefinedResourceType)ri.TypeIndex != PredefinedResourceType.Stream)
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throw new InvalidOperationException (String.Format ("Resource '{0}' was not a Stream. Use GetObject() instead.", name));
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lock (readerLock) {
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reader.BaseStream.Seek (ri.ValuePosition, SeekOrigin.Begin);
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// here we return a Stream from exactly
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// current position so that the returned
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// Stream represents a single object stream.
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long slen = reader.ReadInt32();
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UnmanagedMemoryStream basePtrStream = reader.BaseStream as UnmanagedMemoryStream;
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unsafe {
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if (basePtrStream != null) {
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return new UnmanagedMemoryStream (basePtrStream.PositionPointer, slen);
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} else {
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IntPtr ptr = Marshal.AllocHGlobal ((int) slen);
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byte* addr = (byte*) ptr.ToPointer ();
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UnmanagedMemoryStream ms = new HGlobalUnmanagedMemoryStream (addr, slen, ptr);
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byte [] bytes = new byte [slen < 1024 ? slen : 1024];
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while (slen > 0 ) {
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int x = reader.Read (bytes, 0, (int)Math.Min (bytes.Length, slen));
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if (x == 0)
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throw new FormatException ("The resource data is corrupt. Resource stream ended");
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ms.Write (bytes, 0, x);
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slen -= x;
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}
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ms.Seek (0, SeekOrigin.Begin);
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return ms;
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}
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}
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}
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}
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public void Close ()
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{
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Dispose(true);
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}
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public void Dispose ()
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{
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Dispose(true);
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}
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public IDictionaryEnumerator GetEnumerator () {
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if (reader == null){
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throw new InvalidOperationException("ResourceReader is closed.");
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}
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else {
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return new ResourceEnumerator (this);
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}
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}
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IEnumerator IEnumerable.GetEnumerator ()
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{
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return ((IResourceReader) this).GetEnumerator();
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}
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public void GetResourceData (string resourceName, out string resourceType, out byte [] resourceData)
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{
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if (resourceName == null)
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throw new ArgumentNullException ("resourceName");
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ResourceEnumerator en = new ResourceEnumerator (this);
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while (en.MoveNext ())
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if ((string) en.Key == resourceName) {
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GetResourceDataAt (en.Index, out resourceType, out resourceData);
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return;
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}
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throw new ArgumentException (String.Format ("Specified resource not found: {0}", resourceName));
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}
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private void GetResourceDataAt (int index, out string resourceType, out byte [] data)
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{
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ResourceInfo ri = infos [index];
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int type_index = ri.TypeIndex;
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if (type_index == -1)
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throw new FormatException ("The resource data is corrupt");
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lock (readerLock) {
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reader.BaseStream.Seek (ri.ValuePosition, SeekOrigin.Begin);
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long pos2 = reader.BaseStream.Position;
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// Simply read data, and seek back to the original position
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if (resource_ver == 2) {
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if (type_index >= (int) PredefinedResourceType.FistCustom) {
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int typenameidx = type_index - (int)PredefinedResourceType.FistCustom;
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if (typenameidx >= typeNames.Length)
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throw new FormatException ("The resource data is corrupt. Invalid index to types");
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resourceType = typeNames[typenameidx];
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}
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else
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resourceType = "ResourceTypeCode." + (PredefinedResourceType) type_index;
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ReadValueVer2 (type_index);
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} else {
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// resource ver 1 == untyped
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resourceType = "ResourceTypeCode.Null";
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ReadValueVer1 (Type.GetType (typeNames [type_index], true));
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}
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// FIXME: the data size is wrong.
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int datalen = (int) (reader.BaseStream.Position - pos2);
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reader.BaseStream.Seek (-datalen, SeekOrigin.Current);
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data = new byte [datalen];
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reader.BaseStream.Read (data, 0, datalen);
|
|
}
|
|
}
|
|
|
|
private void Dispose (bool disposing)
|
|
{
|
|
if(disposing) {
|
|
if(reader!=null) {
|
|
reader.Close();
|
|
}
|
|
}
|
|
|
|
reader=null;
|
|
hashes=null;
|
|
infos=null;
|
|
typeNames=null;
|
|
cache = null;
|
|
}
|
|
|
|
internal sealed class ResourceEnumerator : IDictionaryEnumerator
|
|
{
|
|
private ResourceReader reader;
|
|
private int index = -1;
|
|
private bool finished;
|
|
|
|
internal ResourceEnumerator(ResourceReader readerToEnumerate)
|
|
{
|
|
reader = readerToEnumerate;
|
|
FillCache ();
|
|
}
|
|
|
|
public int Index
|
|
{
|
|
get { return index; }
|
|
}
|
|
|
|
public DictionaryEntry Entry {
|
|
get {
|
|
if (reader.reader == null)
|
|
throw new InvalidOperationException("ResourceReader is closed.");
|
|
if (index < 0)
|
|
throw new InvalidOperationException("Enumeration has not started. Call MoveNext.");
|
|
|
|
return new DictionaryEntry(Key, Value);
|
|
}
|
|
}
|
|
|
|
public object Key
|
|
{
|
|
get {
|
|
if (reader.reader == null)
|
|
throw new InvalidOperationException("ResourceReader is closed.");
|
|
if (index < 0)
|
|
throw new InvalidOperationException("Enumeration has not started. Call MoveNext.");
|
|
|
|
return reader.cache [index].ResourceName;
|
|
}
|
|
}
|
|
|
|
public object Value
|
|
{
|
|
get {
|
|
if (reader.reader == null)
|
|
throw new InvalidOperationException("ResourceReader is closed.");
|
|
if (index < 0)
|
|
throw new InvalidOperationException("Enumeration has not started. Call MoveNext.");
|
|
return reader.cache [index].ResourceValue;
|
|
}
|
|
}
|
|
|
|
public UnmanagedMemoryStream ValueAsStream
|
|
{
|
|
get {
|
|
if (reader.reader == null)
|
|
throw new InvalidOperationException("ResourceReader is closed.");
|
|
if (index < 0)
|
|
throw new InvalidOperationException("Enumeration has not started. Call MoveNext.");
|
|
return(reader.ResourceValueAsStream((string) Key, index));
|
|
}
|
|
}
|
|
|
|
public object Current
|
|
{
|
|
get {
|
|
/* Entry does the checking, no
|
|
* need to repeat it here
|
|
*/
|
|
return Entry;
|
|
}
|
|
}
|
|
|
|
public bool MoveNext ()
|
|
{
|
|
if (reader.reader == null)
|
|
throw new InvalidOperationException("ResourceReader is closed.");
|
|
if (finished) {
|
|
return false;
|
|
}
|
|
|
|
if (++index < reader.resourceCount){
|
|
return true;
|
|
}
|
|
|
|
finished=true;
|
|
return false;
|
|
}
|
|
|
|
public void Reset () {
|
|
if (reader.reader == null)
|
|
throw new InvalidOperationException("ResourceReader is closed.");
|
|
index = -1;
|
|
finished = false;
|
|
}
|
|
|
|
void FillCache ()
|
|
{
|
|
if (reader.cache != null)
|
|
return;
|
|
|
|
lock (reader.cache_lock) {
|
|
if (reader.cache != null)
|
|
return;
|
|
|
|
ResourceCacheItem[] resources = new ResourceCacheItem [reader.resourceCount];
|
|
reader.LoadResourceValues (resources);
|
|
reader.cache = resources;
|
|
}
|
|
}
|
|
} // internal class ResourceEnumerator
|
|
} // public sealed class ResourceReader
|
|
} // namespace System.Resources
|