private static void Cast(ILGenerator il, Type type, bool valueAsPointer)
{
if (type == typeof(object))
{
}
else if (TypeHelpers._IsValueType(type))
{
if (valueAsPointer)
{
il.Emit(OpCodes.Unbox, type);
}
else
{
il.Emit(OpCodes.Unbox_Any, type);
}
}
else
{
il.Emit(OpCodes.Castclass, type);
}
}
private static void WriteMapImpl(ILGenerator il, Type type, List <MemberInfo> members, FieldBuilder mapField,
bool allowNonPublicAccessors, bool isGet)
{
OpCode obj, index, value;
var fail = il.DefineLabel();
if (mapField == null)
{
index = OpCodes.Ldarg_0;
obj = OpCodes.Ldarg_1;
value = OpCodes.Ldarg_2;
}
else
{
il.DeclareLocal(typeof(int));
index = OpCodes.Ldloc_0;
obj = OpCodes.Ldarg_1;
value = OpCodes.Ldarg_3;
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, mapField);
il.Emit(OpCodes.Ldarg_2);
il.Emit(OpCodes.Ldloca_S, (byte)0);
il.EmitCall(OpCodes.Callvirt, tryGetValue, null);
il.Emit(OpCodes.Brfalse, fail);
}
var labels = new Label[members.Count];
for (var i = 0; i < labels.Length; i++)
{
labels[i] = il.DefineLabel();
}
il.Emit(index);
il.Emit(OpCodes.Switch, labels);
il.MarkLabel(fail);
il.Emit(OpCodes.Ldstr, "name");
il.Emit(OpCodes.Newobj, typeof(ArgumentOutOfRangeException).GetConstructor(new[] { typeof(string) }));
il.Emit(OpCodes.Throw);
for (var i = 0; i < labels.Length; i++)
{
il.MarkLabel(labels[i]);
var member = members[i];
var isFail = true;
FieldInfo field;
PropertyInfo prop;
if ((field = member as FieldInfo) != null)
{
il.Emit(obj);
Cast(il, type, true);
if (isGet)
{
il.Emit(OpCodes.Ldfld, field);
if (TypeHelpers._IsValueType(field.FieldType))
{
il.Emit(OpCodes.Box, field.FieldType);
}
}
else
{
il.Emit(value);
Cast(il, field.FieldType, false);
il.Emit(OpCodes.Stfld, field);
}
il.Emit(OpCodes.Ret);
isFail = false;
}
else if ((prop = member as PropertyInfo) != null)
{
MethodInfo accessor;
if (prop.CanRead &&
(accessor =
isGet
? prop.GetGetMethod(allowNonPublicAccessors)
: prop.GetSetMethod(allowNonPublicAccessors)) != null)
{
il.Emit(obj);
Cast(il, type, true);
if (isGet)
{
il.EmitCall(TypeHelpers._IsValueType(type) ? OpCodes.Call : OpCodes.Callvirt, accessor, null);
if (TypeHelpers._IsValueType(prop.PropertyType))
{
il.Emit(OpCodes.Box, prop.PropertyType);
}
}
else
{
il.Emit(value);
Cast(il, prop.PropertyType, false);
il.EmitCall(TypeHelpers._IsValueType(type) ? OpCodes.Call : OpCodes.Callvirt, accessor, null);
}
il.Emit(OpCodes.Ret);
isFail = false;
}
}
if (isFail)
{
il.Emit(OpCodes.Br, fail);
}
}
}
private void Initialize()
{
if (_type == null || (current != null && current.GetType() != _type))
{
_type = current.GetType();
}
if (_typeMemberSelector != null)
{
_memberNames = _typeMemberSelector(_type);
}
var allMembers = _memberNames == null || _memberNames.Length == 0;
accessor = TypeAccessor.Create(_type);
if (accessor.GetMembersSupported)
{
var typeMembers = accessor.GetMembers();
if (allMembers)
{
_memberNames = new string[typeMembers.Count];
for (var i = 0; i < _memberNames.Length; i++)
{
_memberNames[i] = typeMembers[i].Name;
}
}
allowNull = new BitArray(_memberNames.Length);
effectiveTypes = new Type[_memberNames.Length];
for (var i = 0; i < _memberNames.Length; i++)
{
Type memberType = null;
var iAllowNull = true;
var hunt = _memberNames[i];
foreach (var member in typeMembers)
{
if (member.Name == hunt)
{
if (memberType == null)
{
var tmp = member.Type;
memberType = Nullable.GetUnderlyingType(tmp) ?? tmp;
iAllowNull = !(TypeHelpers._IsValueType(memberType) && memberType == tmp);
// but keep checking, in case of duplicates
}
else
{
memberType = null; // duplicate found; say nothing
break;
}
}
}
allowNull[i] = iAllowNull;
effectiveTypes[i] = memberType ?? typeof(object);
}
}
else if (allMembers)
{
throw new InvalidOperationException(
"Member information is not available for this type; the required members must be specified explicitly");
}
//current = null;
_isInitialized = true;
}
