Beispiel #1
0
func TypeSizeInBits(typ types.Type) int {
	switch typ := typ.(type) {
	case *types.Int:
		w := typ.Width()
		for w%8 != 0 {
			w++
		}
		return w

	case *types.Float:
		return typ.Type().Width()

	case *types.Pointer:
		return 64

	case *types.Array:
		return TypeSizeInBits(typ.Element()) * typ.Length()

	case *types.Struct:
		return newStructLayout(typ).size

	default:
		panic("unim")
	}
}
Beispiel #2
0
// will always be multiple of 8
func TypeAlignmentInBits(typ types.Type) int {
	switch typ := typ.(type) {
	case *types.Struct:
		return newStructLayout(typ).alignment
	case *types.Array:
		return TypeAlignmentInBits(typ.Element())
	}

	sz := TypeSizeInBits(typ)

	i := 8
	for i < sz {
		i *= 2
	}

	return i
}
Beispiel #3
0
func checkTypeSupported(typ types.Type) {
	switch typ := typ.(type) {
	case *types.Int:
		switch typ.Width() {
		case 1, 8, 16, 32, 64:
			// all good
		default:
			goto unsupported
		}

	case *types.Array:
		checkTypeSupported(typ.Element())

	case *types.Struct:
		for _, field := range typ.Fields() {
			checkTypeSupported(field)
		}
	}

	return

unsupported:
	panic(fmt.Sprintf("unsupported type: %s", typ))
}