move bin to another branch

This commit is contained in:
siddontang 2014-06-30 10:49:32 +08:00
parent 46d2ecda91
commit 86366bbdc5
2 changed files with 0 additions and 855 deletions

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@ -1,608 +0,0 @@
package ledis
import (
"encoding/binary"
"errors"
"github.com/siddontang/ledisdb/leveldb"
)
const (
OPand uint8 = iota + 1
OPor
OPxor
OPnot
)
const (
// byte
segByteWidth uint32 = 9
segByteSize uint32 = 1 << segByteWidth
// bit
segBitWidth uint32 = segByteWidth + 3
segBitSize uint32 = segByteSize << 3
maxByteSize uint32 = 8 << 20
maxSegCount uint32 = maxByteSize / segByteSize
minSeq uint32 = 0
maxSeq uint32 = uint32((maxByteSize << 3) - 1)
)
var bitsInByte = [256]int32{0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3,
4, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3,
3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4,
5, 5, 6, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4,
3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4,
5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 1, 2,
2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3,
4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 2, 3, 3, 4, 3, 4, 4,
5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6,
6, 7, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4, 5, 5, 6, 5,
6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8}
var fillSegment []byte = func() []byte {
data := make([]byte, segByteSize, segByteSize)
for i := uint32(0); i < segByteSize; i++ {
data[i] = 0xff
}
return data
}()
var errBinKey = errors.New("invalid bin key")
var errOffset = errors.New("invalid offset")
func getBit(sz []byte, offset uint32) uint8 {
index := offset >> 3
if index >= uint32(len(sz)) {
return 0 // error("overflow")
}
offset -= index << 3
return sz[index] >> offset & 1
}
func setBit(sz []byte, offset uint32, val uint8) bool {
if val != 1 && val != 0 {
return false // error("invalid val")
}
index := offset >> 3
if index >= uint32(len(sz)) {
return false // error("overflow")
}
offset -= index << 3
if sz[index]>>offset&1 != val {
sz[index] ^= (1 << offset)
}
return true
}
func (db *DB) bEncodeMetaKey(key []byte) []byte {
mk := make([]byte, len(key)+2)
mk[0] = db.index
mk[1] = binMetaType
copy(mk, key)
return mk
}
func (db *DB) bEncodeBinKey(key []byte, seq uint32) []byte {
bk := make([]byte, len(key)+8)
pos := 0
bk[pos] = db.index
pos++
bk[pos] = binType
pos++
binary.BigEndian.PutUint16(bk[pos:], uint16(len(key)))
pos += 2
copy(bk[pos:], key)
pos += len(key)
binary.BigEndian.PutUint32(bk[pos:], seq)
return bk
}
func (db *DB) bDecodeBinKey(bkey []byte) (key []byte, seq uint32, err error) {
if len(bkey) < 8 || bkey[0] != db.index {
err = errBinKey
return
}
keyLen := binary.BigEndian.Uint16(bkey[2:4])
if int(keyLen+8) != len(bkey) {
err = errBinKey
return
}
key = bkey[4 : 4+keyLen]
seq = uint32(binary.BigEndian.Uint32(bkey[4+keyLen:]))
return
}
func (db *DB) bCapByteSize(seq uint32, off uint32) uint32 {
var offByteSize uint32 = (off >> 3) + 1
if offByteSize > segByteSize {
offByteSize = segByteSize
}
return seq<<segByteWidth + offByteSize
}
func (db *DB) bParseOffset(key []byte, offset int32) (seq uint32, off uint32, err error) {
if offset < 0 {
if tailSeq, tailOff, e := db.bGetMeta(key); e != nil {
err = e
return
} else if tailSeq >= 0 {
offset += int32(uint32(tailSeq)<<segBitWidth | uint32(tailOff))
if offset < 0 {
err = errOffset
return
}
}
}
off = uint32(offset)
seq = off >> segBitWidth
off &= (segBitSize - 1)
return
}
func (db *DB) bGetMeta(key []byte) (tailSeq int32, tailOff int32, err error) {
var v []byte
mk := db.bEncodeMetaKey(key)
v, err = db.db.Get(mk)
if err != nil {
return
}
if v != nil {
tailSeq = int32(binary.LittleEndian.Uint32(v[0:4]))
tailOff = int32(binary.LittleEndian.Uint32(v[4:8]))
} else {
tailSeq = -1
tailOff = -1
}
return
}
func (db *DB) bSetMeta(t *tx, key []byte, tailSeq uint32, tailOff uint32) {
ek := db.bEncodeMetaKey(key)
// todo ..
// if size == 0 // headSeq == tailSeq
// t.Delete(ek)
buf := make([]byte, 8)
binary.LittleEndian.PutUint32(buf[0:4], tailSeq)
binary.LittleEndian.PutUint32(buf[4:8], tailOff)
t.Put(ek, buf)
return
}
func (db *DB) bUpdateMeta(t *tx, key []byte, seq uint32, off uint32) (tailSeq uint32, tailOff uint32, err error) {
var ts, to int32
if ts, to, err = db.bGetMeta(key); err != nil {
return
} else {
tailSeq = uint32(MaxInt32(ts, 0))
tailOff = uint32(MaxInt32(to, 0))
}
if seq > tailSeq || (seq == tailSeq && off > tailOff) {
db.bSetMeta(t, key, seq, off)
tailSeq = seq
tailOff = off
}
return
}
func (db *DB) bDelete(t *tx, key []byte) (drop int64) {
mk := db.bEncodeMetaKey(key)
t.Delete(mk)
minKey := db.bEncodeBinKey(key, minSeq)
maxKey := db.bEncodeBinKey(key, maxSeq)
it := db.db.RangeIterator(minKey, maxKey, leveldb.RangeClose)
for ; it.Valid(); it.Next() {
t.Delete(it.Key())
drop = 1
}
it.Close()
return drop
}
func (db *DB) BGet(key []byte) (data []byte, err error) {
if err = checkKeySize(key); err != nil {
return
}
var ts, to int32
if ts, to, err = db.bGetMeta(key); err != nil || ts < 0 {
return
}
var tailSeq, tailOff = uint32(ts), uint32(to)
var capByteSize uint32 = db.bCapByteSize(tailSeq, tailOff)
data = make([]byte, capByteSize, capByteSize)
minKey := db.bEncodeBinKey(key, minSeq)
maxKey := db.bEncodeBinKey(key, tailSeq)
it := db.db.RangeIterator(minKey, maxKey, leveldb.RangeClose)
var seq, s, e uint32
for ; it.Valid(); it.Next() {
if _, seq, err = db.bDecodeBinKey(it.Key()); err != nil {
data = nil
break
}
s = seq << segByteWidth
e = MinUInt32(s+segByteSize, capByteSize)
copy(data[s:e], it.Value())
}
it.Close()
return
}
func (db *DB) BDelete(key []byte) (drop int64, err error) {
if err = checkKeySize(key); err != nil {
return
}
t := db.binTx
t.Lock()
defer t.Unlock()
drop = db.bDelete(t, key)
db.rmExpire(t, bExpType, key)
err = t.Commit()
return
}
func (db *DB) getSegment(key []byte, seq uint32) ([]byte, []byte, error) {
bk := db.bEncodeBinKey(key, seq)
segment, err := db.db.Get(bk)
if err != nil {
return bk, nil, err
}
return bk, segment, nil
}
func (db *DB) allocateSegment(key []byte, seq uint32) ([]byte, []byte, error) {
bk, segment, err := db.getSegment(key, seq)
if err == nil && segment == nil {
segment = make([]byte, segByteSize, segByteSize) // can be optimize ?
}
return bk, segment, err
}
func (db *DB) BSetBit(key []byte, offset int32, val uint8) (ori uint8, err error) {
if err = checkKeySize(key); err != nil {
return
}
// todo : check offset
var seq, off uint32
if seq, off, err = db.bParseOffset(key, offset); err != nil {
return 0, err
}
var bk, segment []byte
if bk, segment, err = db.allocateSegment(key, seq); err != nil {
return 0, err
}
if segment != nil {
ori = getBit(segment, off)
setBit(segment, off, val)
t := db.binTx
t.Lock()
t.Put(bk, segment)
if _, _, e := db.bUpdateMeta(t, key, seq, off); e != nil {
err = e
return
}
err = t.Commit()
t.Unlock()
}
return
}
func (db *DB) BGetBit(key []byte, offset int32) (uint8, error) {
if seq, off, err := db.bParseOffset(key, offset); err != nil {
return 0, err
} else {
_, segment, err := db.getSegment(key, seq)
if err != nil {
return 0, err
}
if segment == nil {
return 0, nil
} else {
return getBit(segment, off), nil
}
}
}
// func (db *DB) BGetRange(key []byte, start int32, end int32) ([]byte, error) {
// section := make([]byte)
// return
// }
func (db *DB) BCount(key []byte, start int32, end int32) (cnt int32, err error) {
var sseq uint32
if sseq, _, err = db.bParseOffset(key, start); err != nil {
return
}
var eseq uint32
if eseq, _, err = db.bParseOffset(key, end); err != nil {
return
}
var segment []byte
skey := db.bEncodeBinKey(key, sseq)
ekey := db.bEncodeBinKey(key, eseq)
it := db.db.RangeIterator(skey, ekey, leveldb.RangeClose)
for ; it.Valid(); it.Next() {
segment = it.Value()
for _, bit := range segment {
cnt += bitsInByte[bit]
}
}
it.Close()
return
}
func (db *DB) BTail(key []byte) (int32, error) {
// effective length of data, the highest bit-pos set in history
tailSeq, tailOff, err := db.bGetMeta(key)
if err != nil {
return 0, err
}
tail := int32(-1)
if tailSeq >= 0 {
tail = int32(uint32(tailSeq)<<segBitWidth | uint32(tailOff))
}
return tail, nil
}
func (db *DB) bSegAnd(a []byte, b []byte, res *[]byte) {
if a == nil || b == nil {
*res = nil
return
}
data := *res
if data == nil {
data = make([]byte, segByteSize, segByteSize)
*res = data
}
for i := uint32(0); i < segByteSize; i++ {
data[i] = a[i] & b[i]
}
return
}
func (db *DB) bSegOr(a []byte, b []byte, res *[]byte) {
if a == nil || b == nil {
if a == nil && b == nil {
*res = nil
} else if a == nil {
*res = b
} else {
*res = a
}
return
}
data := *res
if data == nil {
data = make([]byte, segByteSize, segByteSize)
*res = data
}
for i := uint32(0); i < segByteSize; i++ {
data[i] = a[i] | b[i]
}
return
}
func (db *DB) bIterator(key []byte) *leveldb.RangeLimitIterator {
sk := db.bEncodeBinKey(key, minSeq)
ek := db.bEncodeBinKey(key, maxSeq)
return db.db.RangeIterator(sk, ek, leveldb.RangeClose)
}
func (db *DB) BOperation(op uint8, dstkey []byte, srckeys ...[]byte) (blen int32, err error) {
// return :
// The size of the string stored in the destination key,
// that is equal to the size of the longest input string.
var exeOp func([]byte, []byte, *[]byte)
switch op {
case OPand:
exeOp = db.bSegAnd
case OPor:
exeOp = db.bSegOr
default:
return
}
if dstkey == nil || srckeys == nil || len(srckeys) == 0 {
return
}
blen = -1
t := db.binTx
t.Lock()
defer t.Unlock()
// init - meta info
var maxDstSeq, maxDstOff uint32
var nowSeq, nowOff int32
var keyNum int = len(srckeys)
var iniIdx int = 0
for ; iniIdx < keyNum; iniIdx++ {
if nowSeq, nowOff, err = db.bGetMeta(srckeys[iniIdx]); err != nil { // todo : if key not exists ....
return
}
if nowSeq >= 0 {
maxDstSeq = uint32(nowSeq)
maxDstOff = uint32(nowOff)
break
}
}
if iniIdx+1 >= keyNum { // todo ... while operation is 'not'
// msg("lack of arguments")
return
}
// init - data
var seq, off uint32
var segments = make([][]byte, maxSegCount) // todo : init count also can be optimize while 'and' / 'or'
it := db.bIterator(srckeys[iniIdx])
for ; it.Valid(); it.Next() {
if _, seq, err = db.bDecodeBinKey(it.Key()); err != nil {
// to do ...
it.Close()
return
}
segments[seq] = it.Value()
}
it.Close()
// operation with following keys
for i := iniIdx + 1; i < keyNum; i++ {
if nowSeq, nowOff, err = db.bGetMeta(srckeys[i]); err != nil {
return
}
if nowSeq < 0 {
continue
} else {
seq = uint32(nowSeq)
off = uint32(nowOff)
if seq > maxDstSeq || (seq == maxDstSeq && off > maxDstOff) {
maxDstSeq = seq
maxDstOff = off
}
}
it = db.bIterator(srckeys[i])
segIdx := uint32(0)
for end := false; !end; it.Next() {
end = !it.Valid()
if !end {
if _, seq, err = db.bDecodeBinKey(it.Key()); err != nil {
// to do ...
it.Close()
return
}
} else {
seq = maxSegCount
}
// todo :
// operation 'and' can be optimize here :
// if seq > max_segments_idx, this loop can be break,
// which can avoid cost from Key() and decode key
if op == OPand || op == OPor {
for ; segIdx < seq; segIdx++ {
if segments[segIdx] != nil {
exeOp(segments[segIdx], nil, &segments[segIdx])
}
}
} // else {...}
if !end {
exeOp(segments[seq], it.Value(), &segments[segIdx])
segIdx++
}
}
it.Close()
}
// clear the old data in case
db.bDelete(t, dstkey)
db.rmExpire(t, bExpType, dstkey)
// set data and meta
// if op == OPand || op == OPor {
// for i := maxDstSeq; i >= 0; i-- {
//
// }
// }
db.bSetMeta(t, dstkey, maxDstSeq, maxDstOff)
var bk []byte
for seq, seg := range segments {
if seg != nil {
// todo:
// here can be optimize, like 'updateBinKeySeq',
// avoid too many make mem
bk = db.bEncodeBinKey(dstkey, uint32(seq))
t.Put(bk, seg)
}
}
err = t.Commit()
if err != nil {
blen = int32(maxDstSeq<<segBitWidth | maxDstOff)
}
return
}
// func (db *DB) BExpire(key []byte, duration int64) (int64, error) {
// }
// func (db *DB) BExpireAt(key []byte, when int64) (int64, error) {
// }
// func (db *DB) BTTL(key []byte) (int64, error) {
// }
// func (db *DB) BPersist(key []byte) (int64, error) {
// }
// func (db *DB) BScan(key []byte, count int, inclusive bool) ([]KVPair, error) {
// }
// func (db *DB) bFlush() (drop int64, err error) {
// }

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@ -1,247 +0,0 @@
package ledis
import (
"testing"
)
func cmpBytes(a []byte, b []byte) bool {
if len(a) != len(b) {
return true
}
for i, n := range a {
if n != b[i] {
return true
}
}
return false
}
func newBytes(bitLen int32) []byte {
bytes := bitLen / 8
if bitLen%8 > 0 {
bytes++
}
return make([]byte, bytes, bytes)
}
func TestBinary(t *testing.T) {
testSimple(t)
testSimpleII(t)
testOp(t)
}
func testSimple(t *testing.T) {
db := getTestDB()
key := []byte("test_bin")
if v, _ := db.BGetBit(key, 100); v != 0 {
t.Error(v)
}
if ori, _ := db.BSetBit(key, 50, 1); ori != 0 {
t.Error(ori)
}
if v, _ := db.BGetBit(key, 50); v != 1 {
t.Error(v)
}
if ori, _ := db.BSetBit(key, 50, 0); ori != 1 {
t.Error(ori)
}
if v, _ := db.BGetBit(key, 50); v != 0 {
t.Error(v)
}
db.BSetBit(key, 7, 1)
db.BSetBit(key, 8, 1)
db.BSetBit(key, 9, 1)
db.BSetBit(key, 10, 1)
if sum, _ := db.BCount(key, 0, -1); sum != 4 {
t.Error(sum)
}
data, _ := db.BGet(key)
if cmpBytes(data, []byte{0x80, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00}) {
t.Error(data)
}
if tail, _ := db.BTail(key); tail != int32(50) {
t.Error(tail)
}
}
func testSimpleII(t *testing.T) {
db := getTestDB()
db.FlushAll()
key := []byte("test_bin")
pos := int32(1234567)
if ori, _ := db.BSetBit(key, pos, 1); ori != 0 {
t.Error(ori)
}
if v, _ := db.BGetBit(key, pos); v != 1 {
t.Error(v)
}
if v, _ := db.BGetBit(key, pos-1); v != 0 {
t.Error(v)
}
if v, _ := db.BGetBit(key, pos+1); v != 0 {
t.Error(v)
}
if tail, _ := db.BTail(key); tail != pos {
t.Error(tail)
}
data, _ := db.BGet(key)
stdData := newBytes(pos + 1)
stdData[pos/8] = uint8(1 << (uint(pos) % 8))
if cmpBytes(data, stdData) {
t.Error(len(data))
}
if drop, _ := db.BDelete(key); drop != 1 {
t.Error(false)
}
if data, _ := db.BGet(key); data != nil {
t.Error(data)
}
}
func testOp(t *testing.T) {
db := getTestDB()
db.FlushAll()
dstKey := []byte("test_bin_op")
k0 := []byte("op_0")
k1 := []byte("op_01")
k2 := []byte("op_10")
k3 := []byte("op_11")
srcKeys := [][]byte{k2, k0, k1, k3}
/*
<k0>
<seg> - <high> ... <low>
0 - [10000000] ... [00000001]
1 - nil
2 - [00000000] ... [11111111] ... [00000000]
3 - [01010101] ... [10000001] [10101010]
4 - [10000000] ... [00000000]
5 - [00000000] ... [00000011] [00000001]
...
*/
// (k0 - seg:0)
db.BSetBit(k0, int32(0), 1)
db.BSetBit(k0, int32(segBitSize-1), 1)
// (k0 - seg:2)
pos := segBitSize*2 + segBitSize/2
for i := uint32(0); i < 8; i++ {
db.BSetBit(k0, int32(pos+i), 1)
}
// (k0 - seg:3)
pos = segBitSize * 3
db.BSetBit(k0, int32(pos+8), 1)
db.BSetBit(k0, int32(pos+15), 1)
for i := uint32(1); i < 8; i += 2 {
db.BSetBit(k0, int32(pos+i), 1)
}
pos = segBitSize*4 - 8
for i := uint32(0); i < 8; i += 2 {
db.BSetBit(k0, int32(pos+i), 1)
}
// (k0 - seg:4)
db.BSetBit(k0, int32(segBitSize*5-1), 1)
// (k0 - seg:5)
db.BSetBit(k0, int32(segBitSize*5), 1)
db.BSetBit(k0, int32(segBitSize*5+8), 1)
db.BSetBit(k0, int32(segBitSize*5+9), 1)
/*
<k1>
0 - nil
1 - [00000001] ... [10000000]
2 - nil
3 - [10101010] ... [10000001] [01010101]
...
*/
// (k1 - seg:1)
db.BSetBit(k1, int32(segBitSize+7), 1)
db.BSetBit(k1, int32(segBitSize*2-8), 1)
// (k1 - seg:3)
pos = segBitSize * 3
db.BSetBit(k1, int32(pos+8), 1)
db.BSetBit(k1, int32(pos+15), 1)
for i := uint32(0); i < 8; i += 2 {
db.BSetBit(k0, int32(pos+i), 1)
}
pos = segBitSize*4 - 8
for i := uint32(1); i < 8; i += 2 {
db.BSetBit(k0, int32(pos+i), 1)
}
var stdData []byte
var data []byte
var tmpKeys [][]byte
// op - or
db.BOperation(OPor, dstKey, srcKeys...)
stdData = make([]byte, 5*segByteSize+2)
stdData[0] = uint8(0x01)
stdData[segByteSize-1] = uint8(0x80)
stdData[segByteSize] = uint8(0x80)
stdData[segByteSize*2-1] = uint8(0x01)
stdData[segByteSize*2+segByteSize/2] = uint8(0xff)
stdData[segByteSize*3] = uint8(0xff)
stdData[segByteSize*3+1] = uint8(0x81)
stdData[segByteSize*4-1] = uint8(0xff)
stdData[segByteSize*5-1] = uint8(0x80)
stdData[segByteSize*5] = uint8(0x01)
stdData[segByteSize*5+1] = uint8(0x03)
data, _ = db.BGet(dstKey)
if cmpBytes(data, stdData) {
t.Fatal(false)
}
tmpKeys = [][]byte{k0, dstKey, k1}
db.BOperation(OPor, dstKey, tmpKeys...)
data, _ = db.BGet(dstKey)
if cmpBytes(data, stdData) {
t.Fatal(false)
}
// op - and
db.BOperation(OPand, dstKey, srcKeys...)
stdData = make([]byte, 5*segByteSize+2)
stdData[segByteSize*3+1] = uint8(0x81)
data, _ = db.BGet(dstKey)
if cmpBytes(data, stdData) {
t.Fatal(false)
}
tmpKeys = [][]byte{k0, dstKey, k1}
db.BOperation(OPand, dstKey, tmpKeys...)
data, _ = db.BGet(dstKey)
if cmpBytes(data, stdData) {
t.Fatal(false)
}
}