private static ValueSetter CreateSetter(TagFieldInfo tagFieldInfo)
{
var ownerType = tagFieldInfo.DeclaringType;
var valueType = tagFieldInfo.FieldType;
if (ownerType.IsGenericTypeDefinition)
{
ownerType = ownerType.MakeGenericType(valueType);
}
// Parameter "target", the object on which to set the field `field`.
var ownerParam = Expression.Parameter(typeof(object));
// Parameter "value" the value to be set in the `field` on "target".
var valueParam = Expression.Parameter(typeof(object));
// Unbox structs to their type, or cast a class to it's type.
var castTartgetExp = ownerType.IsValueType ?
Expression.Unbox(ownerParam, ownerType) : Expression.Convert(ownerParam, ownerType);
// Cast the value to its correct type.
var castValueExp = Expression.Convert(valueParam, valueType);
// Access the field
var fieldExp = Expression.Field(castTartgetExp, tagFieldInfo.FieldInfo);
// Assign the "value" to the `field`.
var assignExp = Expression.Assign(fieldExp, castValueExp);
// Compile the whole thing and return.
var setter = Expression.Lambda <ValueSetter>(assignExp, ownerParam, valueParam).Compile();
return(setter);
}
private static ValueGetter CreateGetter(TagFieldInfo tagFieldInfo)
{
var ownerType = tagFieldInfo.DeclaringType;
// Parameter "owner", the object on which to get the field value from.
ParameterExpression ownerParam = Expression.Parameter(typeof(object));
// Unbox structs to their type, or cast a class to it's type.
Expression castTartgetExp = ownerType.IsValueType ?
Expression.Unbox(ownerParam, ownerType) : Expression.Convert(ownerParam, ownerType);
// Access the field
MemberExpression fieldExp = Expression.Field(castTartgetExp, tagFieldInfo.FieldInfo);
// Convert field to object Type
UnaryExpression boxedExp = Expression.Convert(fieldExp, typeof(object));
var getter = Expression.Lambda <ValueGetter>(boxedExp, ownerParam).Compile();
return(getter);
}
/// <summary>
/// Gets the size of a tag-field.
/// </summary>
/// <param name="type">The <see cref="Type"/> of the field.</param>
/// <param name="attr">The <see cref="TagFieldAttribute"/> of the field.</param>
/// <param name="targetVersion">The <see cref="CacheVersion"/> to target.</param>
/// <returns></returns>
public static uint GetFieldSize(Type type, TagFieldAttribute attr, CacheVersion targetVersion)
{
switch (Type.GetTypeCode(type))
{
case TypeCode.Boolean:
case TypeCode.SByte:
case TypeCode.Byte:
return(0x01);
case TypeCode.Char:
case TypeCode.Int16:
case TypeCode.UInt16:
return(0x02);
case TypeCode.Single:
case TypeCode.Int32:
case TypeCode.UInt32:
case TypeCode.Object when attr != null && attr.Flags.HasFlag(TagFieldFlags.Pointer):
case TypeCode.Object when type == typeof(Tag):
case TypeCode.Object when type == typeof(CacheAddress):
case TypeCode.Object when type == typeof(CachedTagInstance) && attr.Flags.HasFlag(TagFieldFlags.Short):
//case TypeCode.Object when type == typeof(RgbColor):
case TypeCode.Object when type == typeof(ArgbColor):
case TypeCode.Object when type == typeof(Point2d):
case TypeCode.Object when type == typeof(StringId):
case TypeCode.Object when type == typeof(Angle):
case TypeCode.Object when type == typeof(VertexShaderReference):
case TypeCode.Object when type == typeof(PixelShaderReference):
return(0x04);
case TypeCode.Double:
case TypeCode.Int64:
case TypeCode.UInt64:
case TypeCode.Object when type == typeof(CachedTagInstance) && targetVersion != CacheVersion.Unknown && CacheVersionDetection.IsBetween(targetVersion, CacheVersion.Halo2Xbox, CacheVersion.Halo2Vista):
case TypeCode.Object when type == typeof(byte[]) && targetVersion != CacheVersion.Unknown && CacheVersionDetection.IsBetween(targetVersion, CacheVersion.Halo2Xbox, CacheVersion.Halo2Vista):
case TypeCode.Object when type == typeof(Rectangle2d):
case TypeCode.Object when type == typeof(RealEulerAngles2d):
case TypeCode.Object when type == typeof(RealPoint2d):
case TypeCode.Object when type == typeof(RealVector2d):
case TypeCode.Object when type.IsGenericType && type.GetGenericTypeDefinition() == typeof(List <>) && targetVersion != CacheVersion.Unknown && CacheVersionDetection.IsBetween(targetVersion, CacheVersion.Halo2Xbox, CacheVersion.Halo2Vista):
case TypeCode.Object when type.IsGenericType && type.GetGenericTypeDefinition() == typeof(TagBlock <>) && targetVersion != CacheVersion.Unknown && CacheVersionDetection.IsBetween(targetVersion, CacheVersion.Halo2Xbox, CacheVersion.Halo2Vista):
return(0x08);
case TypeCode.Object when type == typeof(RealRgbColor):
case TypeCode.Object when type == typeof(RealEulerAngles3d):
case TypeCode.Object when type == typeof(RealPoint3d):
case TypeCode.Object when type == typeof(RealVector3d):
case TypeCode.Object when type == typeof(RealPlane2d):
case TypeCode.Object when type.IsGenericType && type.GetGenericTypeDefinition() == typeof(List <>) && CacheVersionDetection.IsBetween(targetVersion, CacheVersion.Halo3Retail, CacheVersion.Unknown):
case TypeCode.Object when type.IsGenericType && type.GetGenericTypeDefinition() == typeof(TagBlock <>) && CacheVersionDetection.IsBetween(targetVersion, CacheVersion.Halo3Retail, CacheVersion.Unknown):
return(0x0C);
case TypeCode.Decimal:
case TypeCode.Object when type == typeof(CachedTagInstance) && CacheVersionDetection.IsBetween(targetVersion, CacheVersion.Halo3Retail, CacheVersion.Unknown):
case TypeCode.Object when type == typeof(RealArgbColor):
case TypeCode.Object when type == typeof(RealQuaternion):
case TypeCode.Object when type == typeof(RealPlane3d):
return(0x10);
case TypeCode.Object when type == typeof(byte[]) && CacheVersionDetection.IsBetween(targetVersion, CacheVersion.Halo3Retail, CacheVersion.Unknown):
return(0x14);
case TypeCode.Object when type == typeof(RealMatrix4x3):
return(0x30);
case TypeCode.Object when type == typeof(DatumIndex):
return(sizeof(uint));
case TypeCode.String:
case TypeCode.Object when type.IsArray:
return((uint)attr.Length);
case TypeCode.Object when type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Bounds <>):
return(TagFieldInfo.GetFieldSize(type.GenericTypeArguments[0], attr, targetVersion) * 2);
case TypeCode.Object when type.IsEnum:
return(TagFieldInfo.GetFieldSize(type.GetEnumUnderlyingType(), attr, targetVersion));
// Assume the field is a structure
default:
return(TagStructure.GetTagStructureInfo(type, targetVersion).TotalSize);
}
}