func BenchmarkFibDec(b *testing.B) {
enc := make([][]byte, 1e5)
for i := range enc {
v := uint(rand.Int63())
fc, lfc := fibencode(v)
array := bit.NewArray(0)
for _, f := range fc[:len(fc)-1] {
array.Add(f, 64)
lfc -= 64
}
array.Add(fc[len(fc)-1], lfc)
array.Add(0x3, 16)
enc[i] = byteSliceFromUint64Slice(array.Bits())
}
idx := make([]int, b.N)
for i := range idx {
idx[i] = rand.Intn(len(enc))
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
fibdecode(enc[idx[i]], 1)
}
}
func TestFibEncDec(t *testing.T) {
array := bit.NewArray(0)
num := int(1e5)
values := make([]uint, num)
for i := range values {
v := uint(rand.Int63())
values[i] = v
fc, lfc := fibencode(v)
for _, f := range fc[:len(fc)-1] {
array.Add(f, 64)
lfc -= 64
}
array.Add(fc[len(fc)-1], lfc)
}
array.Add(0x3, 16)
bytes := byteSliceFromUint64Slice(array.Bits())
result := fibdecode(bytes, num)
for i, v := range values {
if !assert.EqualValues(t, v, result[i]) {
break
}
}
}
func (a *Array) init() {
a.bits = bit.NewArray(0)
selOpts := &ranksel.Options{Sr: sr, Ss: ss}
a.selector = ranksel.NewBitVector(selOpts)
a.selector.Add(1, 1)
a.initialized = true
}
// Initialize vector
func (v *Vector) init() {
v.bits = bit.NewArray(0)
v.ranks = make([]int, 1)
v.indices = make([]int, 1)
// Add terminating bits
v.bits.Add(0x3, 3)
v.initialized = true
}
// NewBitVector creates a new BitVector.
func NewBitVector(opts *Options) *BitVector {
if opts == nil {
opts = NewOptions()
}
b := bit.NewArray(0)
rs := make([]int, 1)
idx := make([]int, 1)
return &BitVector{
bits: b,
ranks: rs,
indices: idx,
opts: opts,
}
}
// GobDecode populates this array from gob streams.
func (a *Array) GobDecode(data []byte) error {
buf := bytes.NewReader(data)
dec := gob.NewDecoder(buf)
a.bits = bit.NewArray(0)
a.selector = ranksel.NewBitVector(nil)
err := checkErr(
dec.Decode(a.bits),
dec.Decode(a.selector),
dec.Decode(&a.length),
dec.Decode(&a.initialized),
)
if err != nil {
err = fmt.Errorf("sdc: decode failed (%v)", err)
}
return err
}
// GobDecode populates this vector from gob streams.
func (v *Vector) GobDecode(data []byte) error {
buf := bytes.NewReader(data)
dec := gob.NewDecoder(buf)
v.bits = bit.NewArray(0)
err := checkErr(
dec.Decode(v.bits),
dec.Decode(&v.ranks),
dec.Decode(&v.indices),
dec.Decode(&v.popcount),
dec.Decode(&v.length),
dec.Decode(&v.initialized),
)
if err != nil {
err = fmt.Errorf("fibvec: decode failed (%v)", err)
}
return err
}
// GobDecode populates this vector from gob streams.
func (v *BitVector) GobDecode(data []byte) error {
buf := bytes.NewReader(data)
dec := gob.NewDecoder(buf)
v.opts = NewOptions()
v.bits = bit.NewArray(0)
err := checkErr(
dec.Decode(v.bits),
dec.Decode(&v.ranks),
dec.Decode(&v.indices),
dec.Decode(&v.popcount),
dec.Decode(v.opts),
)
if err != nil {
err = fmt.Errorf("ranksel: decode failed (%v)", err)
}
return err
}