func verifyIsAffine(t *testing.T, aff encoding.Byte, err string) { m, c := DecomposeAffineEncoding(aff) test := encoding.ByteAffine{encoding.ByteLinear(m), c} for i := 0; i < 256; i++ { a, b := aff.Encode(byte(i)), test.Encode(byte(i)) if a != b { t.Fatalf(err, i, a, b) } } }
// isAffine returns true if the given encoding is affine and false if not. func isAffine(aff encoding.Byte) bool { m, c := DecomposeAffineEncoding(aff) test := encoding.ByteAffine{encoding.ByteLinear(m), c} for i := 0; i < 256; i++ { a, b := aff.Encode(byte(i)), test.Encode(byte(i)) if a != b { return false } } return true }