remove xor from wire mixvec type; mixing type will implement this

wire/mixvec.go

@@ -26,59 +26,21 @@ func NewMixVec(n, msize uint32) *MixVec {
 	}
 }
 
-// IsDim returns whether the Vec has dimensions n-by-msize.
-func (v *MixVec) IsDim(n, msize uint32) bool {
-	return v.N == n && v.Msize == msize && len(v.Data) == int(n*msize)
-}
-
-// Equals returns whether the two vectors have equal dimensions and data.
-func (v *MixVec) Equals(other *MixVec) bool {
-	return other.IsDim(v.N, v.Msize) && bytes.Equal(other.Data, v.Data)
-}
-
-// M returns the i'th message of the vector.
-func (v *MixVec) M(i int) []byte {
-	off := uint32(i) * v.Msize
-	return v.Data[off : off+v.Msize]
-}
-
 func (v *MixVec) String() string {
+	m := func(i int) []byte {
+		off := uint32(i) * v.Msize
+		return v.Data[off : off+v.Msize]
+	}
+
 	b := new(strings.Builder)
 	b.Grow(2 + int(v.N*(2*v.Msize+1)))
 	b.WriteString("[")
 	for i := 0; uint32(i) < v.N; i++ {
 		if i != 0 {
 			b.WriteString(" ")
 		}
-		fmt.Fprintf(b, "%x", v.M(i))
+		fmt.Fprintf(b, "%x", m(i))
 	}
 	b.WriteString("]")
 	return b.String()
 }
-
-// Xor writes the xor of each vector element of src1 and src2 into v.
-// Source and destination vectors are allowed to be equal.
-// Panics if vectors do not share identical dimensions.
-func (v *MixVec) Xor(src1, src2 *MixVec) {
-	switch {
-	case v.N != src1.N, v.Msize != src1.Msize, len(v.Data) != len(src1.Data):
-		fallthrough
-	case v.N != src2.N, v.Msize != src2.Msize, len(v.Data) != len(src2.Data):
-		panic("dcnet: vectors do not share identical dimensions")
-	}
-	for i := range v.Data {
-		v.Data[i] = src1.Data[i] ^ src2.Data[i]
-	}
-}
-
-// XorVectors calculates the xor of all vectors.
-// Panics if vectors do not share identical dimensions.
-func XorVectors(vs ...MixVec) MixVec {
-	n := uint32(len(vs))
-	msize := vs[0].Msize
-	res := NewMixVec(n, msize)
-	for i := range vs {
-		res.Xor(res, &vs[i])
-	}
-	return *res
-}