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//------------------------------------------------------------------------------
// <copyright file="altserialization.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
/*
* AltSerialization.cs
*
* Copyright (c) 1998-2000, Microsoft Corporation
*
*/
namespace System.Web.Util {
using System;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters;
using System.Runtime.Serialization.Formatters.Binary;
using System.Web.SessionState;
internal static class AltSerialization {
enum TypeID : byte {
String = 1,
Int32,
Boolean,
DateTime,
Decimal,
Byte,
Char,
Single,
Double,
SByte,
Int16,
Int64,
UInt16,
UInt32,
UInt64,
TimeSpan,
Guid,
IntPtr,
UIntPtr,
Object,
Null,
}
[SuppressMessage("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands", Justification = "This method is safe critical (we're allowed to call the SerializationSurrogateSelector property getter).")]
internal static void WriteValueToStream(Object value, BinaryWriter writer) {
if (value == null) {
writer.Write((byte)TypeID.Null);
}
else if (value is String) {
writer.Write((byte)TypeID.String);
writer.Write((String) value);
}
else if (value is Int32) {
writer.Write((byte)TypeID.Int32);
writer.Write((Int32) value);
}
else if (value is Boolean) {
writer.Write((byte)TypeID.Boolean);
writer.Write((Boolean) value);
}
else if (value is DateTime) {
writer.Write((byte)TypeID.DateTime);
writer.Write(((DateTime) value).Ticks);
}
else if (value is Decimal) {
writer.Write((byte)TypeID.Decimal);
int[] bits = Decimal.GetBits((Decimal)value);
for (int i = 0; i < 4; i++) {
writer.Write((int)bits[i]);
}
}
else if (value is Byte) {
writer.Write((byte)TypeID.Byte);
writer.Write((byte) value);
}
else if (value is Char) {
writer.Write((byte)TypeID.Char);
writer.Write((char) value);
}
else if (value is Single) {
writer.Write((byte)TypeID.Single);
writer.Write((float) value);
}
else if (value is Double) {
writer.Write((byte)TypeID.Double);
writer.Write((double) value);
}
else if (value is SByte) {
writer.Write((byte)TypeID.SByte);
writer.Write((SByte) value);
}
else if (value is Int16) {
writer.Write((byte)TypeID.Int16);
writer.Write((short) value);
}
else if (value is Int64) {
writer.Write((byte)TypeID.Int64);
writer.Write((long) value);
}
else if (value is UInt16) {
writer.Write((byte)TypeID.UInt16);
writer.Write((UInt16) value);
}
else if (value is UInt32) {
writer.Write((byte)TypeID.UInt32);
writer.Write((UInt32) value);
}
else if (value is UInt64) {
writer.Write((byte)TypeID.UInt64);
writer.Write((UInt64) value);
}
else if (value is TimeSpan) {
writer.Write((byte)TypeID.TimeSpan);
writer.Write(((TimeSpan) value).Ticks);
}
else if (value is Guid) {
writer.Write((byte)TypeID.Guid);
Guid guid = (Guid) value;
byte[] bits = guid.ToByteArray();
writer.Write(bits);
}
else if (value is IntPtr) {
writer.Write((byte)TypeID.IntPtr);
IntPtr v = (IntPtr) value;
if (IntPtr.Size == 4) {
writer.Write((Int32)v.ToInt32());
}
else {
Debug.Assert(IntPtr.Size == 8);
writer.Write((Int64)v.ToInt64());
}
}
else if (value is UIntPtr) {
writer.Write((byte)TypeID.UIntPtr);
UIntPtr v = (UIntPtr) value;
if (UIntPtr.Size == 4) {
writer.Write((UInt32)v.ToUInt32());
}
else {
Debug.Assert(UIntPtr.Size == 8);
writer.Write((UInt64)v.ToUInt64());
}
}
else {
writer.Write((byte)TypeID.Object);
BinaryFormatter formatter = new BinaryFormatter();
if (SessionStateUtility.SerializationSurrogateSelector != null) {
formatter.SurrogateSelector = SessionStateUtility.SerializationSurrogateSelector;
}
try {
formatter.Serialize(writer.BaseStream, value);
} catch (Exception innerException) {
HttpException outerException = new HttpException(SR.GetString(SR.Cant_serialize_session_state), innerException);
outerException.SetFormatter(new UseLastUnhandledErrorFormatter(outerException));
throw outerException;
}
}
}
[SuppressMessage("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands", Justification = "This method is safe critical (we're allowed to call the SerializationSurrogateSelector property getter).")]
internal static Object ReadValueFromStream(BinaryReader reader) {
TypeID id;
Object value = null;
id = (TypeID) reader.ReadByte();
switch (id) {
case TypeID.String:
value = reader.ReadString();
break;
case TypeID.Int32:
value = reader.ReadInt32();
break;
case TypeID.Boolean:
value = reader.ReadBoolean();
break;
case TypeID.DateTime:
value = new DateTime(reader.ReadInt64());
break;
case TypeID.Decimal:
{
int[] bits = new int[4];
for (int i = 0; i < 4; i++) {
bits[i] = reader.ReadInt32();
}
value = new Decimal(bits);
}
break;
case TypeID.Byte:
value = reader.ReadByte();
break;
case TypeID.Char:
value = reader.ReadChar();
break;
case TypeID.Single:
value = reader.ReadSingle();
break;
case TypeID.Double:
value = reader.ReadDouble();
break;
case TypeID.SByte:
value = reader.ReadSByte();
break;
case TypeID.Int16:
value = reader.ReadInt16();
break;
case TypeID.Int64:
value = reader.ReadInt64();
break;
case TypeID.UInt16:
value = reader.ReadUInt16();
break;
case TypeID.UInt32:
value = reader.ReadUInt32();
break;
case TypeID.UInt64:
value = reader.ReadUInt64();
break;
case TypeID.TimeSpan:
value = new TimeSpan(reader.ReadInt64());
break;
case TypeID.Guid:
{
byte[] bits = reader.ReadBytes(16);
value = new Guid(bits);
}
break;
case TypeID.IntPtr:
if (IntPtr.Size == 4) {
value = new IntPtr(reader.ReadInt32());
}
else {
Debug.Assert(IntPtr.Size == 8);
value = new IntPtr(reader.ReadInt64());
}
break;
case TypeID.UIntPtr:
if (UIntPtr.Size == 4) {
value = new UIntPtr(reader.ReadUInt32());
}
else {
Debug.Assert(UIntPtr.Size == 8);
value = new UIntPtr(reader.ReadUInt64());
}
break;
case TypeID.Object:
BinaryFormatter formatter = new BinaryFormatter();
if (SessionStateUtility.SerializationSurrogateSelector != null) {
formatter.SurrogateSelector = SessionStateUtility.SerializationSurrogateSelector;
}
value = formatter.Deserialize(reader.BaseStream);
break;
case TypeID.Null:
value = null;
break;
}
return value;
}
}
}
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