package winpwn

import "encoding/binary"

// P16 packs a uint16 into a little-endian byte slice.
func P16(val uint16) []byte {
	b := make([]byte, 2)
	binary.LittleEndian.PutUint16(b, val)
	return b
}

// P32 packs a uint32 into a little-endian byte slice.
func P32(val uint32) []byte {
	b := make([]byte, 4)
	binary.LittleEndian.PutUint32(b, val)
	return b
}

// P64 packs a uint64 into a little-endian byte slice.
func P64(val uint64) []byte {
	b := make([]byte, 8)
	binary.LittleEndian.PutUint64(b, val)
	return b
}

// U16 unpacks a little-endian uint16 from the first 2 bytes of b.
func U16(b []byte) uint16 {
	return binary.LittleEndian.Uint16(b)
}

// U32 unpacks a little-endian uint32 from the first 4 bytes of b.
func U32(b []byte) uint32 {
	return binary.LittleEndian.Uint32(b)
}

// U64 unpacks a little-endian uint64 from the first 8 bytes of b.
func U64(b []byte) uint64 {
	return binary.LittleEndian.Uint64(b)
}