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-rw-r--r--trie/encoding.go57
-rw-r--r--trie/encoding_test.go68
-rw-r--r--trie/iterator.go2
-rw-r--r--trie/shortnode.go4
-rw-r--r--trie/trie.go10
5 files changed, 89 insertions, 52 deletions
diff --git a/trie/encoding.go b/trie/encoding.go
index 524807f06..9c862d78f 100644
--- a/trie/encoding.go
+++ b/trie/encoding.go
@@ -16,13 +16,7 @@
package trie
-import (
- "bytes"
- "encoding/hex"
- "strings"
-)
-
-func CompactEncode(hexSlice []byte) string {
+func CompactEncode(hexSlice []byte) []byte {
terminator := 0
if hexSlice[len(hexSlice)-1] == 16 {
terminator = 1
@@ -40,15 +34,15 @@ func CompactEncode(hexSlice []byte) string {
hexSlice = append([]byte{flags, 0}, hexSlice...)
}
- var buff bytes.Buffer
- for i := 0; i < len(hexSlice); i += 2 {
- buff.WriteByte(byte(16*hexSlice[i] + hexSlice[i+1]))
+ l := len(hexSlice) / 2
+ var buf = make([]byte, l)
+ for i := 0; i < l; i++ {
+ buf[i] = 16*hexSlice[2*i] + hexSlice[2*i+1]
}
-
- return buff.String()
+ return buf
}
-func CompactDecode(str string) []byte {
+func CompactDecode(str []byte) []byte {
base := CompactHexDecode(str)
base = base[:len(base)-1]
if base[0] >= 2 {
@@ -63,30 +57,23 @@ func CompactDecode(str string) []byte {
return base
}
-func CompactHexDecode(str string) []byte {
- base := "0123456789abcdef"
- var hexSlice []byte
-
- enc := hex.EncodeToString([]byte(str))
- for _, v := range enc {
- hexSlice = append(hexSlice, byte(strings.IndexByte(base, byte(v))))
+func CompactHexDecode(str []byte) []byte {
+ l := len(str)*2 + 1
+ var nibbles = make([]byte, l)
+ for i, b := range str {
+ nibbles[i*2] = b / 16
+ nibbles[i*2+1] = b % 16
}
- hexSlice = append(hexSlice, 16)
-
- return hexSlice
+ nibbles[l-1] = 16
+ return nibbles
}
-func DecodeCompact(key []byte) string {
- const base = "0123456789abcdef"
- var str string
-
- for _, v := range key {
- if v < 16 {
- str += string(base[v])
- }
+func DecodeCompact(key []byte) []byte {
+ l := len(key) / 2
+ var res = make([]byte, l)
+ for i := 0; i < l; i++ {
+ v1, v0 := key[2*i], key[2*i+1]
+ res[i] = v1*16 + v0
}
-
- res, _ := hex.DecodeString(str)
-
- return string(res)
+ return res
}
diff --git a/trie/encoding_test.go b/trie/encoding_test.go
index e52c6ba8d..e49b57ef0 100644
--- a/trie/encoding_test.go
+++ b/trie/encoding_test.go
@@ -17,9 +17,14 @@
package trie
import (
+ "encoding/hex"
+ "testing"
+
checker "gopkg.in/check.v1"
)
+func Test(t *testing.T) { checker.TestingT(t) }
+
type TrieEncodingSuite struct{}
var _ = checker.Suite(&TrieEncodingSuite{})
@@ -28,48 +33,93 @@ func (s *TrieEncodingSuite) TestCompactEncode(c *checker.C) {
// even compact encode
test1 := []byte{1, 2, 3, 4, 5}
res1 := CompactEncode(test1)
- c.Assert(res1, checker.Equals, "\x11\x23\x45")
+ c.Assert(res1, checker.DeepEquals, []byte("\x11\x23\x45"))
// odd compact encode
test2 := []byte{0, 1, 2, 3, 4, 5}
res2 := CompactEncode(test2)
- c.Assert(res2, checker.Equals, "\x00\x01\x23\x45")
+ c.Assert(res2, checker.DeepEquals, []byte("\x00\x01\x23\x45"))
//odd terminated compact encode
test3 := []byte{0, 15, 1, 12, 11, 8 /*term*/, 16}
res3 := CompactEncode(test3)
- c.Assert(res3, checker.Equals, "\x20\x0f\x1c\xb8")
+ c.Assert(res3, checker.DeepEquals, []byte("\x20\x0f\x1c\xb8"))
// even terminated compact encode
test4 := []byte{15, 1, 12, 11, 8 /*term*/, 16}
res4 := CompactEncode(test4)
- c.Assert(res4, checker.Equals, "\x3f\x1c\xb8")
+ c.Assert(res4, checker.DeepEquals, []byte("\x3f\x1c\xb8"))
}
func (s *TrieEncodingSuite) TestCompactHexDecode(c *checker.C) {
exp := []byte{7, 6, 6, 5, 7, 2, 6, 2, 16}
- res := CompactHexDecode("verb")
+ res := CompactHexDecode([]byte("verb"))
c.Assert(res, checker.DeepEquals, exp)
}
func (s *TrieEncodingSuite) TestCompactDecode(c *checker.C) {
// odd compact decode
exp := []byte{1, 2, 3, 4, 5}
- res := CompactDecode("\x11\x23\x45")
+ res := CompactDecode([]byte("\x11\x23\x45"))
c.Assert(res, checker.DeepEquals, exp)
// even compact decode
exp = []byte{0, 1, 2, 3, 4, 5}
- res = CompactDecode("\x00\x01\x23\x45")
+ res = CompactDecode([]byte("\x00\x01\x23\x45"))
c.Assert(res, checker.DeepEquals, exp)
// even terminated compact decode
exp = []byte{0, 15, 1, 12, 11, 8 /*term*/, 16}
- res = CompactDecode("\x20\x0f\x1c\xb8")
+ res = CompactDecode([]byte("\x20\x0f\x1c\xb8"))
c.Assert(res, checker.DeepEquals, exp)
// even terminated compact decode
exp = []byte{15, 1, 12, 11, 8 /*term*/, 16}
- res = CompactDecode("\x3f\x1c\xb8")
+ res = CompactDecode([]byte("\x3f\x1c\xb8"))
+ c.Assert(res, checker.DeepEquals, exp)
+}
+
+func (s *TrieEncodingSuite) TestDecodeCompact(c *checker.C) {
+ exp, _ := hex.DecodeString("012345")
+ res := DecodeCompact([]byte{0, 1, 2, 3, 4, 5})
c.Assert(res, checker.DeepEquals, exp)
+
+ exp, _ = hex.DecodeString("012345")
+ res = DecodeCompact([]byte{0, 1, 2, 3, 4, 5, 16})
+ c.Assert(res, checker.DeepEquals, exp)
+
+ exp, _ = hex.DecodeString("abcdef")
+ res = DecodeCompact([]byte{10, 11, 12, 13, 14, 15})
+ c.Assert(res, checker.DeepEquals, exp)
+}
+
+func BenchmarkCompactEncode(b *testing.B) {
+
+ testBytes := []byte{0, 15, 1, 12, 11, 8 /*term*/, 16}
+ for i := 0; i < b.N; i++ {
+ CompactEncode(testBytes)
+ }
+}
+
+func BenchmarkCompactDecode(b *testing.B) {
+ testBytes := []byte{0, 15, 1, 12, 11, 8 /*term*/, 16}
+ for i := 0; i < b.N; i++ {
+ CompactDecode(testBytes)
+ }
+}
+
+func BenchmarkCompactHexDecode(b *testing.B) {
+ testBytes := []byte{7, 6, 6, 5, 7, 2, 6, 2, 16}
+ for i := 0; i < b.N; i++ {
+ CompactHexDecode(testBytes)
+ }
+
+}
+
+func BenchmarkDecodeCompact(b *testing.B) {
+ testBytes := []byte{7, 6, 6, 5, 7, 2, 6, 2, 16}
+ for i := 0; i < b.N; i++ {
+ DecodeCompact(testBytes)
+ }
+
}
diff --git a/trie/iterator.go b/trie/iterator.go
index 698e64b34..9c4c7fbe5 100644
--- a/trie/iterator.go
+++ b/trie/iterator.go
@@ -41,7 +41,7 @@ func (self *Iterator) Next() bool {
self.Key = make([]byte, 32)
}
- key := RemTerm(CompactHexDecode(string(self.Key)))
+ key := RemTerm(CompactHexDecode(self.Key))
k := self.next(self.trie.root, key, isIterStart)
self.Key = []byte(DecodeCompact(k))
diff --git a/trie/shortnode.go b/trie/shortnode.go
index b5fc6d1f9..569d5f109 100644
--- a/trie/shortnode.go
+++ b/trie/shortnode.go
@@ -26,7 +26,7 @@ type ShortNode struct {
}
func NewShortNode(t *Trie, key []byte, value Node) *ShortNode {
- return &ShortNode{t, []byte(CompactEncode(key)), value, false}
+ return &ShortNode{t, CompactEncode(key), value, false}
}
func (self *ShortNode) Value() Node {
self.value = self.trie.trans(self.value)
@@ -49,7 +49,7 @@ func (self *ShortNode) Hash() interface{} {
}
func (self *ShortNode) Key() []byte {
- return CompactDecode(string(self.key))
+ return CompactDecode(self.key)
}
func (self *ShortNode) setDirty(dirty bool) {
diff --git a/trie/trie.go b/trie/trie.go
index e7ee86402..abf48a850 100644
--- a/trie/trie.go
+++ b/trie/trie.go
@@ -69,7 +69,7 @@ func (self *Trie) Iterator() *Iterator {
func (self *Trie) Copy() *Trie {
cpy := make([]byte, 32)
- copy(cpy, self.roothash)
+ copy(cpy, self.roothash) // NOTE: cpy isn't being used anywhere?
trie := New(nil, nil)
trie.cache = self.cache.Copy()
if self.root != nil {
@@ -131,7 +131,7 @@ func (self *Trie) Update(key, value []byte) Node {
self.mu.Lock()
defer self.mu.Unlock()
- k := CompactHexDecode(string(key))
+ k := CompactHexDecode(key)
if len(value) != 0 {
node := NewValueNode(self, value)
@@ -149,7 +149,7 @@ func (self *Trie) Get(key []byte) []byte {
self.mu.Lock()
defer self.mu.Unlock()
- k := CompactHexDecode(string(key))
+ k := CompactHexDecode(key)
n := self.get(self.root, k)
if n != nil {
@@ -164,7 +164,7 @@ func (self *Trie) Delete(key []byte) Node {
self.mu.Lock()
defer self.mu.Unlock()
- k := CompactHexDecode(string(key))
+ k := CompactHexDecode(key)
self.root = self.delete(self.root, k)
return self.root
@@ -336,7 +336,7 @@ func (self *Trie) mknode(value *common.Value) Node {
case 2:
// A value node may consists of 2 bytes.
if value.Get(0).Len() != 0 {
- key := CompactDecode(string(value.Get(0).Bytes()))
+ key := CompactDecode(value.Get(0).Bytes())
if key[len(key)-1] == 16 {
return NewShortNode(self, key, NewValueNode(self, value.Get(1).Bytes()))
} else {
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-27 17:55:09 +0800