public unsafe static int SizeOf(Type type)
{
if (type is null)
{
throw new ArgumentNullException(nameof(type));
}
if (type is TypeBuilder)
{
throw new NotSupportedException(nameof(type));
}
if (type.IsGenericTypeDefinition)
{
throw new NotSupportedException(nameof(type));
}
if (type.IsByRefLike())
{
// TODO: ref struct 的大小是所有字段大小的和。
throw new NotSupportedException(nameof(type));
}
if (type.IsByRef || type.IsPointer || !type.IsValueType || type.IsClass || type.IsInterface || type.IsArray)
{
return(IntPtr.Size);
}
return((Type.GetTypeCode(type)) switch
{
TypeCode.Boolean => sizeof(bool),
TypeCode.Char => sizeof(char),
TypeCode.SByte => sizeof(sbyte),
TypeCode.Byte => sizeof(byte),
TypeCode.Int16 => sizeof(short),
TypeCode.UInt16 => sizeof(ushort),
TypeCode.Int32 => sizeof(int),
TypeCode.UInt32 => sizeof(uint),
TypeCode.Int64 => sizeof(long),
TypeCode.UInt64 => sizeof(ulong),
TypeCode.Single => sizeof(float),
TypeCode.Double => sizeof(double),
TypeCode.Decimal => sizeof(decimal),
TypeCode.DateTime => sizeof(DateTime),
_ => GenericInvokerHelper.SizeOf(type),
});
public unsafe static int SizeOf(Type type)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
if (type is TypeBuilder)
{
throw new ArgumentException("Unable get size of a TypeBuilder.", nameof(type));
}
if (type.IsGenericTypeDefinition)
{
throw new ArgumentException("Unable get size of a generic definition type.", nameof(type));
}
switch (Type.GetTypeCode(type))
{
case TypeCode.Boolean:
return(sizeof(bool));
case TypeCode.Char:
return(sizeof(char));
case TypeCode.SByte:
return(sizeof(sbyte));
case TypeCode.Byte:
return(sizeof(byte));
case TypeCode.Int16:
return(sizeof(short));
case TypeCode.UInt16:
return(sizeof(ushort));
case TypeCode.Int32:
return(sizeof(int));
case TypeCode.UInt32:
return(sizeof(uint));
case TypeCode.Int64:
return(sizeof(long));
case TypeCode.UInt64:
return(sizeof(ulong));
case TypeCode.Single:
return(sizeof(float));
case TypeCode.Double:
return(sizeof(double));
case TypeCode.Decimal:
return(sizeof(decimal));
case TypeCode.DateTime:
return(sizeof(DateTime));
}
if (type.IsPointer ||
type.IsInterface ||
type.IsByRef ||
typeof(object) == type ||
typeof(IntPtr) == type)
{
return(IntPtr.Size);
}
return(GenericInvokerHelper.SizeOf(type));
}
