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//
// TypeSystem.cs
//
// Author:
// Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2010 Jb Evain
//
// 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 Mono.Cecil.Metadata;
namespace Mono.Cecil {
public abstract class TypeSystem {
sealed class CorlibTypeSystem : TypeSystem {
public CorlibTypeSystem (ModuleDefinition module)
: base (module)
{
}
internal override TypeReference LookupType (string @namespace, string name)
{
var metadata = module.MetadataSystem;
if (metadata.Types == null)
Initialize (module.Types);
return module.Read (this, (_, reader) => {
var types = reader.metadata.Types;
for (int i = 0; i < types.Length; i++) {
if (types [i] == null)
types [i] = reader.GetTypeDefinition ((uint) i + 1);
var type = types [i];
if (type.Name == name && type.Namespace == @namespace)
return type;
}
return null;
});
}
static void Initialize (object obj)
{
}
}
sealed class CommonTypeSystem : TypeSystem {
AssemblyNameReference corlib;
public CommonTypeSystem (ModuleDefinition module)
: base (module)
{
}
internal override TypeReference LookupType (string @namespace, string name)
{
return CreateTypeReference (@namespace, name);
}
public AssemblyNameReference GetCorlibReference ()
{
if (corlib != null)
return corlib;
const string mscorlib = "mscorlib";
var references = module.AssemblyReferences;
for (int i = 0; i < references.Count; i++) {
var reference = references [i];
if (reference.Name == mscorlib)
return corlib = reference;
}
corlib = new AssemblyNameReference {
Name = mscorlib,
Version = GetCorlibVersion (),
PublicKeyToken = new byte [] { 0xb7, 0x7a, 0x5c, 0x56, 0x19, 0x34, 0xe0, 0x89 },
};
references.Add (corlib);
return corlib;
}
Version GetCorlibVersion ()
{
switch (module.Runtime) {
case TargetRuntime.Net_1_0:
case TargetRuntime.Net_1_1:
return new Version (1, 0, 0, 0);
case TargetRuntime.Net_2_0:
return new Version (2, 0, 0, 0);
case TargetRuntime.Net_4_0:
return new Version (4, 0, 0, 0);
default:
throw new NotSupportedException ();
}
}
TypeReference CreateTypeReference (string @namespace, string name)
{
return new TypeReference (@namespace, name, module, GetCorlibReference ());
}
}
readonly ModuleDefinition module;
TypeReference type_object;
TypeReference type_void;
TypeReference type_bool;
TypeReference type_char;
TypeReference type_sbyte;
TypeReference type_byte;
TypeReference type_int16;
TypeReference type_uint16;
TypeReference type_int32;
TypeReference type_uint32;
TypeReference type_int64;
TypeReference type_uint64;
TypeReference type_single;
TypeReference type_double;
TypeReference type_intptr;
TypeReference type_uintptr;
TypeReference type_string;
TypeReference type_typedref;
TypeSystem (ModuleDefinition module)
{
this.module = module;
}
internal static TypeSystem CreateTypeSystem (ModuleDefinition module)
{
if (IsCorlib (module))
return new CorlibTypeSystem (module);
return new CommonTypeSystem (module);
}
static bool IsCorlib (ModuleDefinition module)
{
if (module.Assembly == null)
return false;
return module.Assembly.Name.Name == "mscorlib";
}
internal abstract TypeReference LookupType (string @namespace, string name);
TypeReference LookupSystemType (ref TypeReference typeRef, string name, ElementType element_type)
{
lock (module.SyncRoot) {
if (typeRef != null)
return typeRef;
var type = LookupType ("System", name);
type.etype = element_type;
return typeRef = type;
}
}
TypeReference LookupSystemValueType (ref TypeReference typeRef, string name, ElementType element_type)
{
lock (module.SyncRoot) {
if (typeRef != null)
return typeRef;
var type = LookupType ("System", name);
type.etype = element_type;
type.IsValueType = true;
return typeRef = type;
}
}
public IMetadataScope Corlib {
get {
var common = this as CommonTypeSystem;
if (common == null)
return module;
return common.GetCorlibReference ();
}
}
public TypeReference Object {
get { return type_object ?? (LookupSystemType (ref type_object, "Object", ElementType.Object)); }
}
public TypeReference Void {
get { return type_void ?? (LookupSystemType (ref type_void, "Void", ElementType.Void)); }
}
public TypeReference Boolean {
get { return type_bool ?? (LookupSystemValueType (ref type_bool, "Boolean", ElementType.Boolean)); }
}
public TypeReference Char {
get { return type_char ?? (LookupSystemValueType (ref type_char, "Char", ElementType.Char)); }
}
public TypeReference SByte {
get { return type_sbyte ?? (LookupSystemValueType (ref type_sbyte, "SByte", ElementType.I1)); }
}
public TypeReference Byte {
get { return type_byte ?? (LookupSystemValueType (ref type_byte, "Byte", ElementType.U1)); }
}
public TypeReference Int16 {
get { return type_int16 ?? (LookupSystemValueType (ref type_int16, "Int16", ElementType.I2)); }
}
public TypeReference UInt16 {
get { return type_uint16 ?? (LookupSystemValueType (ref type_uint16, "UInt16", ElementType.U2)); }
}
public TypeReference Int32 {
get { return type_int32 ?? (LookupSystemValueType (ref type_int32, "Int32", ElementType.I4)); }
}
public TypeReference UInt32 {
get { return type_uint32 ?? (LookupSystemValueType (ref type_uint32, "UInt32", ElementType.U4)); }
}
public TypeReference Int64 {
get { return type_int64 ?? (LookupSystemValueType (ref type_int64, "Int64", ElementType.I8)); }
}
public TypeReference UInt64 {
get { return type_uint64 ?? (LookupSystemValueType (ref type_uint64, "UInt64", ElementType.U8)); }
}
public TypeReference Single {
get { return type_single ?? (LookupSystemValueType (ref type_single, "Single", ElementType.R4)); }
}
public TypeReference Double {
get { return type_double ?? (LookupSystemValueType (ref type_double, "Double", ElementType.R8)); }
}
public TypeReference IntPtr {
get { return type_intptr ?? (LookupSystemValueType (ref type_intptr, "IntPtr", ElementType.I)); }
}
public TypeReference UIntPtr {
get { return type_uintptr ?? (LookupSystemValueType (ref type_uintptr, "UIntPtr", ElementType.U)); }
}
public TypeReference String {
get { return type_string ?? (LookupSystemType (ref type_string, "String", ElementType.String)); }
}
public TypeReference TypedReference {
get { return type_typedref ?? (LookupSystemValueType (ref type_typedref, "TypedReference", ElementType.TypedByRef)); }
}
}
}
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