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Extensions.cs
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Extensions.cs
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/*
Copyright (C) 2014-2016 de4dot@gmail.com
This file is part of dnSpy
dnSpy is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
dnSpy is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Collections.Generic;
using System.Linq;
using dnlib.DotNet;
using dnlib.DotNet.Emit;
using dnlib.IO;
using dnlib.PE;
namespace dnSpy.Decompiler.Shared {
public static class Extensions {
public static bool GetRVA(this IMemberDef member, out uint rva, out long fileOffset) {
rva = 0;
fileOffset = 0;
if (member is MethodDef)
rva = (uint)(member as MethodDef).RVA;
else if (member is FieldDef)
rva = (uint)(member as FieldDef).RVA;
if (rva == 0)
return false;
fileOffset = member.Module.ToFileOffset(rva);
return true;
}
public static IImageStream GetImageStream(this ModuleDef module, uint rva) {
var m = module as ModuleDefMD;//TODO: Support CorModuleDef
if (m == null)
return null;
return m.MetaData.PEImage.CreateStream((RVA)rva);
}
public static long ToFileOffset(this ModuleDef module, uint rva) {
var m = module as ModuleDefMD;//TODO: Support CorModuleDef
if (m == null)
return (uint)rva;
return (long)m.MetaData.PEImage.ToFileOffset((RVA)rva);
}
public static int GetCodeSize(this CilBody body) {
if (body == null || body.Instructions.Count == 0)
return 0;
var instr = body.Instructions[body.Instructions.Count - 1];
return (int)instr.Offset + instr.GetSize();
}
public static IList<Parameter> GetParameters(this IMethod method) {
if (method == null || method.MethodSig == null)
return new List<Parameter>();
var md = method as MethodDef;
if (md != null)
return md.Parameters;
var list = new List<Parameter>();
int paramIndex = 0, methodSigIndex = 0;
if (method.MethodSig.HasThis)
list.Add(new Parameter(paramIndex++, Parameter.HIDDEN_THIS_METHOD_SIG_INDEX, method.DeclaringType.ToTypeSig()));
foreach (var type in method.MethodSig.GetParams())
list.Add(new Parameter(paramIndex++, methodSigIndex++, type));
return list;
}
public static IEnumerable<MethodDef> GetAllMethods(this PropertyDef p) {
foreach (var m in p.GetMethods) yield return m;
foreach (var m in p.SetMethods) yield return m;
foreach (var m in p.OtherMethods) yield return m;
}
public static IEnumerable<MethodDef> GetAllMethods(this EventDef e) {
if (e.AddMethod != null)
yield return e.AddMethod;
if (e.InvokeMethod != null)
yield return e.InvokeMethod;
if (e.RemoveMethod != null)
yield return e.RemoveMethod;
foreach (var m in e.OtherMethods)
yield return m;
}
public static HashSet<MethodDef> GetPropEventMethods(this TypeDef type) {
var hash = new HashSet<MethodDef>();
foreach (var p in type.Properties) {
foreach (var m in p.GetAllMethods())
hash.Add(m);
}
foreach (var e in type.Events) {
foreach (var m in e.GetAllMethods())
hash.Add(m);
}
hash.Remove(null);
return hash;
}
public static bool IsIndexer(this PropertyDef prop) {
if (prop == null || prop.PropertySig.GetParamCount() == 0)
return false;
var accessor = prop.GetMethod ?? prop.SetMethod;
var basePropDef = prop;
if (accessor != null && accessor.HasOverrides) {
var baseAccessor = accessor.Overrides.First().MethodDeclaration.ResolveMethodDef();
if (baseAccessor != null) {
foreach (PropertyDef baseProp in baseAccessor.DeclaringType.Properties) {
if (baseProp.GetMethod == baseAccessor || baseProp.SetMethod == baseAccessor) {
basePropDef = baseProp;
break;
}
}
}
else
return false;
}
var defaultMemberName = GetDefaultMemberName(basePropDef.DeclaringType);
if (defaultMemberName == basePropDef.Name)
return true;
return false;
}
static string GetDefaultMemberName(TypeDef type) {
if (type == null)
return null;
foreach (var ca in type.CustomAttributes.FindAll("System.Reflection.DefaultMemberAttribute")) {
if (ca.Constructor != null && ca.Constructor.FullName == @"System.Void System.Reflection.DefaultMemberAttribute::.ctor(System.String)" &&
ca.ConstructorArguments.Count == 1 &&
ca.ConstructorArguments[0].Value is UTF8String) {
return (UTF8String)ca.ConstructorArguments[0].Value;
}
}
return null;
}
public static TypeDef Resolve(this IType type) {
return type == null ? null : type.ScopeType.ResolveTypeDef();
}
public static bool CanSortFields(this TypeDef type) {
return type.IsAutoLayout;
}
public static bool CanSortMethods(this TypeDef type) {
return !(type.IsInterface && type.IsImport);
}
public static IEnumerable<IMemberDef> GetNonSortedMethodsPropsEvents(this TypeDef type) {
var hash = new HashSet<MethodDef>();
var defs = new List<Tuple<IMemberDef, List<MethodDef>>>();
foreach (var p in type.Properties) {
var methods = new List<MethodDef>(p.GetAllMethods());
foreach (var m in methods)
hash.Add(m);
methods.Sort((a, b) => a.MDToken.Raw.CompareTo(b.MDToken.Raw));
defs.Add(Tuple.Create((IMemberDef)p, methods));
}
foreach (var e in type.Events) {
var methods = new List<MethodDef>(e.GetAllMethods());
foreach (var m in methods)
hash.Add(m);
methods.Sort((a, b) => a.MDToken.Raw.CompareTo(b.MDToken.Raw));
defs.Add(Tuple.Create((IMemberDef)e, methods));
}
foreach (var m in type.Methods) {
if (hash.Contains(m))
continue;
defs.Add(Tuple.Create((IMemberDef)m, new List<MethodDef> { m }));
}
defs.Sort((a, b) => {
if (a.Item2.Count == 0 || b.Item2.Count == 0)
return b.Item2.Count.CompareTo(a.Item2.Count);
return a.Item2[0].MDToken.Raw.CompareTo(b.Item2[0].MDToken.Raw);
});
return defs.Select(a => a.Item1);
}
}
}