complete all encode & unit test

uint128be.go

@@ -2,7 +2,9 @@ package unibase2n
 
 import (
 	"encoding/binary"
+	"fmt"
 	"math/bits"
+	"strconv"
 )
 
 type uint128be struct {
@@ -10,35 +12,62 @@ type uint128be struct {
 	b uint64
 }
 
-func readuint128be(b []byte) *uint128be {
-	return &uint128be{
+func readuint128be(b []byte) uint128be {
+	if len(b) < 16 {
+		b = append(b, make([]byte, 16-len(b))...)
+	}
+	return uint128be{
 		a: binary.BigEndian.Uint64(b[:8]),
 		b: binary.BigEndian.Uint64(b[8:16]),
 	}
 }
 
-func (num *uint128be) add(n *uint128be) {
+func (num *uint128be) addeq(n uint128be) {
 	var c uint64
 	num.b, c = bits.Add64(num.b, n.b, 0)
 	num.a, _ = bits.Add64(num.a, n.a, c)
 	return
 }
 
-// shr only supports shifting 1 ~ 63 bits
-func (num *uint128be) shr(c uint8) {
+// shreq only supports shifting 1 ~ 63 bits
+func (num *uint128be) shreq(c uint8) {
 	mask := uint64(1)<<c - 1
 	aout := (num.a & mask) << (64 - c)
 	num.a = num.a >> c
 	num.b = aout | (num.b >> c)
 }
 
-func (num *uint128be) and(n *uint128be) {
+func (num *uint128be) andeq(n uint128be) {
 	num.a &= n.a
 	num.b &= n.b
 }
 
+func (num uint128be) and(n uint128be) (r uint128be) {
+	r.a = num.a & n.a
+	r.b = num.b & n.b
+	return
+}
+
+func (num *uint128be) oreq(n uint128be) {
+	num.a |= n.a
+	num.b |= n.b
+}
+
+func (num uint128be) or(n uint128be) (r uint128be) {
+	r.a = num.a | n.a
+	r.b = num.b | n.b
+	return
+}
+
 func (num *uint128be) write(b []byte) {
 	binary.BigEndian.PutUint64(b[:8], num.a)
 	binary.BigEndian.PutUint64(b[8:16], num.b)
 	return
 }
+
+func (num uint128be) String() string {
+	if num.a == 0 {
+		return "0x" + strconv.FormatUint(num.b, 16)
+	}
+	return fmt.Sprintf("0x%x%016x", num.a, num.b)
+}