2006-01-24 Chris Toshok <toshok@ximian.com>
[mono.git] / mcs / class / corlib / System.Runtime.Serialization.Formatters.Binary / BinaryCommon.cs
1 // BinaryCommon.cs
2 //
3 // Author:
4 //   Lluis Sanchez Gual (lluis@ideary.com)
5 //
6 // (C) 2003 Lluis Sanchez Gual
7
8 //
9 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
10 //
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
18 // 
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
21 // 
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 //
30
31 using System;
32
33 namespace System.Runtime.Serialization.Formatters.Binary
34 {
35         internal class BinaryCommon
36         {
37                 // Header present in all binary serializations
38                 public static byte[] BinaryHeader = new Byte[] {0,1,0,0,0,255,255,255,255,1,0,0,0,0,0,0,0};
39
40                 static Type[] _typeCodesToType;
41                 static byte[] _typeCodeMap;
42                 public static bool UseReflectionSerialization = false;
43
44                 static BinaryCommon()
45                 {
46                         _typeCodesToType = new Type [19];
47                         _typeCodesToType[(int)BinaryTypeCode.Boolean] = typeof (Boolean);
48                         _typeCodesToType[(int)BinaryTypeCode.Byte] = typeof (Byte);
49                         _typeCodesToType[(int)BinaryTypeCode.Char] = typeof (Char);
50                         _typeCodesToType[(int)BinaryTypeCode.TimeSpan] = typeof (TimeSpan);
51                         _typeCodesToType[(int)BinaryTypeCode.DateTime] = typeof (DateTime);
52                         _typeCodesToType[(int)BinaryTypeCode.Decimal] = typeof (Decimal);
53                         _typeCodesToType[(int)BinaryTypeCode.Double] = typeof (Double);
54                         _typeCodesToType[(int)BinaryTypeCode.Int16] = typeof (Int16);
55                         _typeCodesToType[(int)BinaryTypeCode.Int32] = typeof (Int32);
56                         _typeCodesToType[(int)BinaryTypeCode.Int64] = typeof (Int64);
57                         _typeCodesToType[(int)BinaryTypeCode.SByte] = typeof (SByte);
58                         _typeCodesToType[(int)BinaryTypeCode.Single] = typeof (Single);
59                         _typeCodesToType[(int)BinaryTypeCode.UInt16] = typeof (UInt16);
60                         _typeCodesToType[(int)BinaryTypeCode.UInt32] = typeof (UInt32);
61                         _typeCodesToType[(int)BinaryTypeCode.UInt64] = typeof (UInt64);
62                         _typeCodesToType[(int)BinaryTypeCode.Null] = null;
63                         _typeCodesToType[(int)BinaryTypeCode.String] = typeof (string);
64
65                         _typeCodeMap = new byte[30];
66                         _typeCodeMap[(int)TypeCode.Boolean] = (byte) BinaryTypeCode.Boolean;
67                         _typeCodeMap[(int)TypeCode.Byte] = (byte) BinaryTypeCode.Byte;
68                         _typeCodeMap[(int)TypeCode.Char] = (byte) BinaryTypeCode.Char;
69                         _typeCodeMap[(int)TypeCode.DateTime] = (byte) BinaryTypeCode.DateTime;
70                         _typeCodeMap[(int)TypeCode.Decimal] = (byte) BinaryTypeCode.Decimal;
71                         _typeCodeMap[(int)TypeCode.Double] = (byte) BinaryTypeCode.Double;
72                         _typeCodeMap[(int)TypeCode.Int16] = (byte) BinaryTypeCode.Int16;
73                         _typeCodeMap[(int)TypeCode.Int32] = (byte) BinaryTypeCode.Int32;
74                         _typeCodeMap[(int)TypeCode.Int64] = (byte) BinaryTypeCode.Int64;
75                         _typeCodeMap[(int)TypeCode.SByte] = (byte) BinaryTypeCode.SByte;
76                         _typeCodeMap[(int)TypeCode.Single] = (byte) BinaryTypeCode.Single;
77                         _typeCodeMap[(int)TypeCode.UInt16] = (byte) BinaryTypeCode.UInt16;
78                         _typeCodeMap[(int)TypeCode.UInt32] = (byte) BinaryTypeCode.UInt32;
79                         _typeCodeMap[(int)TypeCode.UInt64] = (byte) BinaryTypeCode.UInt64;
80                         _typeCodeMap[(int)TypeCode.String] = (byte) BinaryTypeCode.String;
81
82                         // TimeStamp does not have a TypeCode, so it is managed as a special
83                         // case in GetTypeCode()
84                         
85                         // This environment variable is only for test and benchmarking pourposes.
86                         // By default, mono will always use IL generated class serializers.
87                         string s = Environment.GetEnvironmentVariable("MONO_REFLECTION_SERIALIZER");
88                         if (s == null) s = "no";
89                         UseReflectionSerialization = (s != "no");
90                 }
91
92                 public static bool IsPrimitive (Type type)
93                 {
94                         return (type.IsPrimitive && type != typeof (IntPtr)) || 
95                                 type == typeof (DateTime) || 
96                                 type == typeof (TimeSpan) || 
97                                 type == typeof (Decimal);
98                 }
99
100                 public static byte GetTypeCode (Type type)
101                 {
102                         if (type == typeof(TimeSpan)) return (byte) BinaryTypeCode.TimeSpan;
103                         else return _typeCodeMap [(int)Type.GetTypeCode(type)];
104                 }
105
106                 public static Type GetTypeFromCode (int code)
107                 {
108                         return _typeCodesToType [code];
109                 }
110                 
111                 public static void CheckSerializable (Type type, ISurrogateSelector selector, StreamingContext context)
112                 {
113                         if (!type.IsSerializable && !type.IsInterface) 
114                         {
115                                 if (selector != null && selector.GetSurrogate (type, context, out selector) != null)
116                                         return;
117
118                                 throw new SerializationException ("Type " + type + " is not marked as Serializable.");
119                         }
120                 }
121                 
122                 public static void SwapBytes (byte[] byteArray, int size, int dataSize)
123                 {
124                         byte b;
125                         if (dataSize == 8) {
126                                 for (int n=0; n<size; n+=8) {
127                                         b = byteArray [n]; byteArray [n] = byteArray [n + 7]; byteArray [n + 7] = b;
128                                         b = byteArray [n+1]; byteArray [n+1] = byteArray [n + 6]; byteArray [n + 6] = b;
129                                         b = byteArray [n+2]; byteArray [n+2] = byteArray [n + 5]; byteArray [n + 5] = b;
130                                         b = byteArray [n+3]; byteArray [n+3] = byteArray [n + 4]; byteArray [n + 4] = b;
131                                 }
132                         } else if (dataSize == 4) {
133                                 for (int n=0; n<size; n+=4) {
134                                         b = byteArray [n]; byteArray [n] = byteArray [n + 3]; byteArray [n + 3] = b;
135                                         b = byteArray [n+1]; byteArray [n+1] = byteArray [n + 2]; byteArray [n + 2] = b;
136                                 }
137                         } else if (dataSize == 2) {
138                                 for (int n=0; n<size; n+=2) {
139                                         b = byteArray [n]; byteArray [n] = byteArray [n + 1]; byteArray [n + 1] = b;
140                                 }
141                         }
142                 }
143         }
144
145         internal enum BinaryElement : byte
146         {
147                 Header = 0,
148                 RefTypeObject = 1,
149                 UntypedRuntimeObject = 2,
150                 UntypedExternalObject = 3,
151                 RuntimeObject = 4,
152                 ExternalObject = 5,
153                 String = 6,
154                 GenericArray = 7,
155                 BoxedPrimitiveTypeValue = 8,
156                 ObjectReference = 9,
157                 NullValue = 10,
158                 End = 11,
159                 Assembly = 12,
160                 ArrayFiller8b = 13,
161                 ArrayFiller32b = 14,
162                 ArrayOfPrimitiveType = 15,
163                 ArrayOfObject = 16,
164                 ArrayOfString = 17,
165                 Method = 18,
166                 _Unknown4 = 19,
167                 _Unknown5 = 20,
168                 MethodCall = 21,
169                 MethodResponse = 22
170         }
171
172         internal enum TypeTag : byte
173         {
174                 PrimitiveType = 0,
175                 String = 1,
176                 ObjectType = 2,
177                 RuntimeType = 3,
178                 GenericType = 4,
179                 ArrayOfObject = 5,
180                 ArrayOfString = 6,
181                 ArrayOfPrimitiveType = 7
182         }
183
184         internal enum ArrayStructure : byte
185         {
186                 SingleDimensional = 0,
187                 Jagged = 1,
188                 MultiDimensional = 2
189         }
190
191         internal enum MethodFlags
192         {
193                 NoArguments = 1,
194                 PrimitiveArguments = 2,
195                 ArgumentsInSimpleArray = 4,
196                 ArgumentsInMultiArray = 8,
197                 ExcludeLogicalCallContext = 16,
198                 IncludesLogicalCallContext = 64,
199                 IncludesSignature = 128,
200
201                 FormatMask = 15,
202
203 #if NET_2_0
204                 GenericArguments = 0x8000,
205                 NeedsInfoArrayMask = 4 + 8 + 64 + 128 + 0x8000,
206 #else
207                 NeedsInfoArrayMask = 4 + 8 + 64 + 128,
208 #endif
209         }
210
211         internal enum ReturnTypeTag : byte
212         {
213                 Null = 2,
214                 PrimitiveType = 8,
215                 ObjectType = 16,
216                 Exception = 32
217         }
218
219         enum BinaryTypeCode : byte
220         {
221                 Boolean = 1,
222                 Byte = 2,
223                 Char = 3,
224                 Decimal = 5,
225                 Double = 6,
226                 Int16 = 7,
227                 Int32 = 8,
228                 Int64 = 9,
229                 SByte = 10,
230                 Single = 11,
231                 TimeSpan = 12,
232                 DateTime = 13,
233                 UInt16 = 14,
234                 UInt32 = 15,
235                 UInt64 = 16,
236                 Null = 17,
237                 String = 18
238         }
239
240 }