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using System;
using System.Collections.Generic;
using System.Text;
using Mono.Cecil;
using GuiCompare;
namespace CorCompare {
static class TypeHelper {
public static AssemblyResolver Resolver = new AssemblyResolver ();
internal static bool IsPublic (TypeReference typeref)
{
if (typeref == null)
throw new ArgumentNullException ("typeref");
TypeDefinition td = typeref.Resolve ();
if (td == null)
return false;
return td.IsPublic;
}
internal static bool IsDelegate (TypeReference typeref)
{
return IsDerivedFrom (typeref, "System.MulticastDelegate");
}
internal static bool IsDerivedFrom (TypeReference type, string derivedFrom)
{
bool first = true;
foreach (var def in WalkHierarchy (type)) {
if (first) {
first = false;
continue;
}
if (def.FullName == derivedFrom)
return true;
}
return false;
}
internal static IEnumerable<TypeDefinition> WalkHierarchy (TypeReference type)
{
for (var def = type.Resolve (); def != null; def = GetBaseType (def))
yield return def;
}
internal static IEnumerable<TypeReference> GetInterfaces (TypeReference type)
{
var ifaces = new Dictionary<string, TypeReference> ();
foreach (var def in WalkHierarchy (type))
foreach (TypeReference iface in def.Interfaces)
ifaces [iface.FullName] = iface;
return ifaces.Values;
}
internal static TypeDefinition GetBaseType (TypeDefinition child)
{
if (child.BaseType == null)
return null;
return child.BaseType.Resolve ();
}
internal static bool IsPublic (CustomAttribute att)
{
return IsPublic (att.AttributeType);
}
internal static string GetFullName (CustomAttribute att)
{
return att.AttributeType.FullName;
}
internal static TypeDefinition GetTypeDefinition (CustomAttribute att)
{
return att.AttributeType.Resolve ();
}
static bool IsOverride (MethodDefinition method)
{
return method.IsVirtual && !method.IsNewSlot;
}
public static MethodDefinition GetBaseMethodInTypeHierarchy (MethodDefinition method)
{
if (!IsOverride (method))
return method;
var @base = GetBaseType (method.DeclaringType);
while (@base != null) {
MethodDefinition base_method = TryMatchMethod (@base.Resolve (), method);
if (base_method != null)
return GetBaseMethodInTypeHierarchy (base_method) ?? base_method;
@base = GetBaseType (@base);
}
return method;
}
static MethodDefinition TryMatchMethod (TypeDefinition type, MethodDefinition method)
{
if (!type.HasMethods)
return null;
foreach (MethodDefinition candidate in type.Methods)
if (MethodMatch (candidate, method))
return candidate;
return null;
}
static bool MethodMatch (MethodDefinition candidate, MethodDefinition method)
{
if (!candidate.IsVirtual)
return false;
if (candidate.Name != method.Name)
return false;
if (!TypeMatch (candidate.ReturnType, method.ReturnType))
return false;
if (candidate.Parameters.Count != method.Parameters.Count)
return false;
for (int i = 0; i < candidate.Parameters.Count; i++)
if (!TypeMatch (candidate.Parameters [i].ParameterType, method.Parameters [i].ParameterType))
return false;
return true;
}
public static bool TypeMatch (IModifierType a, IModifierType b)
{
if (!TypeMatch (a.ModifierType, b.ModifierType))
return false;
return TypeMatch (a.ElementType, b.ElementType);
}
public static bool TypeMatch (TypeSpecification a, TypeSpecification b)
{
if (a is GenericInstanceType)
return TypeMatch ((GenericInstanceType) a, (GenericInstanceType) b);
if (a is IModifierType)
return TypeMatch ((IModifierType) a, (IModifierType) b);
return TypeMatch (a.ElementType, b.ElementType);
}
public static bool TypeMatch (GenericInstanceType a, GenericInstanceType b)
{
if (!TypeMatch (a.ElementType, b.ElementType))
return false;
if (a.GenericArguments.Count != b.GenericArguments.Count)
return false;
if (a.GenericArguments.Count == 0)
return true;
for (int i = 0; i < a.GenericArguments.Count; i++)
if (!TypeMatch (a.GenericArguments [i], b.GenericArguments [i]))
return false;
return true;
}
public static bool TypeMatch (TypeReference a, TypeReference b)
{
if (a is GenericParameter)
return true;
if (a is TypeSpecification || b is TypeSpecification) {
if (a.GetType () != b.GetType ())
return false;
return TypeMatch ((TypeSpecification) a, (TypeSpecification) b);
}
return a.FullName == b.FullName;
}
}
}
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