Action <BasePackable, Type, Stream, object> GetWriteFunc(Type type)
{
if (WriteFuncs.ContainsKey(type))
{
return(WriteFuncs[type]);
}
foreach (var t in type.GetInterfaces())
{
if (PackInterfaces.ContainsKey(t))
{
return(PackInterfaces[t]);
}
}
throw new NotSupportedException();
}
public Action <object, Stream> CreateWrite(Type type)
{
var members = GetMembers(type);
var ret = new DynamicMethod("Write_" + type.MetadataToken, null, new Type[] { typeof(object), typeof(Stream) });
var il = ret.GetILGenerator();
foreach (MemberInfo m in members)
{
var f = m as FieldInfo;
var p = m as PropertyInfo;
Type mtype = null;
if (m is FieldInfo)
{
mtype = f.FieldType;
}
else if (m is PropertyInfo)
{
mtype = p.PropertyType;
}
if (!WriteFuncs.ContainsKey(mtype))
{
throw new NotSupportedException();
}
var ifnotnull = il.DefineLabel();
var ifnull = il.DefineLabel();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Castclass, type);
if (m is FieldInfo)
{
il.Emit(OpCodes.Ldfld, f);
}
else if (m is PropertyInfo)
{
il.Emit(OpCodes.Call, p.GetGetMethod());
}
if (!mtype.IsValueType)
{
il.Emit(OpCodes.Dup);
il.Emit(OpCodes.Brtrue, ifnotnull);
il.Emit(OpCodes.Ldc_I4_0);
il.Emit(OpCodes.Box, typeof(byte));
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Call, WriteFuncs[typeof(byte)].Method);
il.Emit(OpCodes.Pop);
il.Emit(OpCodes.Br, ifnull);
il.MarkLabel(ifnotnull);
il.Emit(OpCodes.Ldc_I4_1);
il.Emit(OpCodes.Box, typeof(byte));
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Call, WriteFuncs[typeof(byte)].Method);
}
if (mtype.IsValueType)
{
il.Emit(OpCodes.Box, mtype);
}
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Call, WriteFuncs[mtype].Method);
il.MarkLabel(ifnull);
}
il.Emit(OpCodes.Ret);
return((Action <object, Stream>)ret.CreateDelegate(typeof(Action <object, Stream>)));
}
