wp

enc/cumdelta.go

@@ -48,18 +48,15 @@ type CumulativeDeltaCompressor struct {
 }
 
 // Після відновлення із снапшота
-func NewCumulativeDeltaCompressor(buf []byte, fracDigits byte) *CumulativeDeltaCompressor {
+func NewCumulativeDeltaCompressor(fracDigits byte, buf []byte, payloadSize int) *CumulativeDeltaCompressor {
 	var coef float64 = 1
 	if fracDigits > 0 {
 		coef = math.Pow(10, float64(fracDigits))
 	}
-	return &CumulativeDeltaCompressor{
+	s := &CumulativeDeltaCompressor{
 		buf:  buf,
 		coef: coef,
 	}
-}
-
-func (s *CumulativeDeltaCompressor) RestoreState(payloadSize int) {
 	if payloadSize > 0 {
 		s.pos = payloadSize - 1 // завжди показує на h
 		// base value на початку
@@ -74,16 +71,27 @@ func (s *CumulativeDeltaCompressor) RestoreState(payloadSize int) {
 			log.Fatalf("bug: get last delta: %s", err)
 		}
 	}
+	return s
 }
 
+// func (s *CumulativeDeltaCompressor) RestoreState() {
+
+// }
+
 // func (s *CumulativeDeltaCompressor) Size() int {
 // 	return s.pos
 // }
 
+type EvaluationReport struct {
+	CompressionWay  int
+	TotalSpace      int
+	AdditionalSpace int
+	Delta           uint64
+}
+
 func (s *CumulativeDeltaCompressor) Evaluate(value float64) (compressionWay int, requiredSpace int) {
 	delta := uint64((value-s.baseValue)*s.coef + eps) // fix - if delta 0, no eps
 	requiredSpace = s.pos
-	// fix - requiredSpace - all space
 	if s.pos > 0 {
 		if s.h < 128 {
 			// run