add vendor

vendor/github.com/siddontang/rdb/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 siddontang
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/siddontang/rdb/decode.go

@@ -0,0 +1,128 @@
+package rdb
+
+// Copyright 2014 Wandoujia Inc. All Rights Reserved.
+// Licensed under the MIT (MIT-LICENSE.txt) license.
+
+import "fmt"
+
+import (
+	"github.com/cupcake/rdb"
+	"github.com/cupcake/rdb/nopdecoder"
+)
+
+func DecodeDump(p []byte) (interface{}, error) {
+	d := &decoder{}
+	if err := rdb.DecodeDump(p, 0, nil, 0, d); err != nil {
+		return nil, err
+	}
+	return d.obj, d.err
+}
+
+type decoder struct {
+	nopdecoder.NopDecoder
+	obj interface{}
+	err error
+}
+
+func (d *decoder) initObject(obj interface{}) {
+	if d.err != nil {
+		return
+	}
+	if d.obj != nil {
+		d.err = fmt.Errorf("invalid object, init again")
+	} else {
+		d.obj = obj
+	}
+}
+
+func (d *decoder) Set(key, value []byte, expiry int64) {
+	d.initObject(String(value))
+}
+
+func (d *decoder) StartHash(key []byte, length, expiry int64) {
+	d.initObject(Hash(nil))
+}
+
+func (d *decoder) Hset(key, field, value []byte) {
+	if d.err != nil {
+		return
+	}
+	switch h := d.obj.(type) {
+	default:
+		d.err = fmt.Errorf("invalid object, not a hashmap")
+	case Hash:
+		v := struct {
+			Field, Value []byte
+		}{
+			field,
+			value,
+		}
+		d.obj = append(h, v)
+	}
+}
+
+func (d *decoder) StartSet(key []byte, cardinality, expiry int64) {
+	d.initObject(Set(nil))
+}
+
+func (d *decoder) Sadd(key, member []byte) {
+	if d.err != nil {
+		return
+	}
+	switch s := d.obj.(type) {
+	default:
+		d.err = fmt.Errorf("invalid object, not a set")
+	case Set:
+		d.obj = append(s, member)
+	}
+}
+
+func (d *decoder) StartList(key []byte, length, expiry int64) {
+	d.initObject(List(nil))
+}
+
+func (d *decoder) Rpush(key, value []byte) {
+	if d.err != nil {
+		return
+	}
+	switch l := d.obj.(type) {
+	default:
+		d.err = fmt.Errorf("invalid object, not a list")
+	case List:
+		d.obj = append(l, value)
+	}
+}
+
+func (d *decoder) StartZSet(key []byte, cardinality, expiry int64) {
+	d.initObject(ZSet(nil))
+}
+
+func (d *decoder) Zadd(key []byte, score float64, member []byte) {
+	if d.err != nil {
+		return
+	}
+	switch z := d.obj.(type) {
+	default:
+		d.err = fmt.Errorf("invalid object, not a zset")
+	case ZSet:
+		v := struct {
+			Member []byte
+			Score  float64
+		}{
+			member,
+			score,
+		}
+		d.obj = append(z, v)
+	}
+}
+
+type String []byte
+type List [][]byte
+type Hash []struct {
+	Field, Value []byte
+}
+type Set [][]byte
+type ZSet []struct {
+	Member []byte
+	Score  float64
+}

vendor/github.com/siddontang/rdb/digest.go

@@ -0,0 +1,106 @@
+// Copyright 2014 Wandoujia Inc. All Rights Reserved.
+// Licensed under the MIT (MIT-LICENSE.txt) license.
+
+package rdb
+
+import (
+	"encoding/binary"
+	"hash"
+)
+
+var crc64_table = [256]uint64{
+	0x0000000000000000, 0x7ad870c830358979, 0xf5b0e190606b12f2, 0x8f689158505e9b8b,
+	0xc038e5739841b68f, 0xbae095bba8743ff6, 0x358804e3f82aa47d, 0x4f50742bc81f2d04,
+	0xab28ecb46814fe75, 0xd1f09c7c5821770c, 0x5e980d24087fec87, 0x24407dec384a65fe,
+	0x6b1009c7f05548fa, 0x11c8790fc060c183, 0x9ea0e857903e5a08, 0xe478989fa00bd371,
+	0x7d08ff3b88be6f81, 0x07d08ff3b88be6f8, 0x88b81eabe8d57d73, 0xf2606e63d8e0f40a,
+	0xbd301a4810ffd90e, 0xc7e86a8020ca5077, 0x4880fbd87094cbfc, 0x32588b1040a14285,
+	0xd620138fe0aa91f4, 0xacf86347d09f188d, 0x2390f21f80c18306, 0x594882d7b0f40a7f,
+	0x1618f6fc78eb277b, 0x6cc0863448deae02, 0xe3a8176c18803589, 0x997067a428b5bcf0,
+	0xfa11fe77117cdf02, 0x80c98ebf2149567b, 0x0fa11fe77117cdf0, 0x75796f2f41224489,
+	0x3a291b04893d698d, 0x40f16bccb908e0f4, 0xcf99fa94e9567b7f, 0xb5418a5cd963f206,
+	0x513912c379682177, 0x2be1620b495da80e, 0xa489f35319033385, 0xde51839b2936bafc,
+	0x9101f7b0e12997f8, 0xebd98778d11c1e81, 0x64b116208142850a, 0x1e6966e8b1770c73,
+	0x8719014c99c2b083, 0xfdc17184a9f739fa, 0x72a9e0dcf9a9a271, 0x08719014c99c2b08,
+	0x4721e43f0183060c, 0x3df994f731b68f75, 0xb29105af61e814fe, 0xc849756751dd9d87,
+	0x2c31edf8f1d64ef6, 0x56e99d30c1e3c78f, 0xd9810c6891bd5c04, 0xa3597ca0a188d57d,
+	0xec09088b6997f879, 0x96d1784359a27100, 0x19b9e91b09fcea8b, 0x636199d339c963f2,
+	0xdf7adabd7a6e2d6f, 0xa5a2aa754a5ba416, 0x2aca3b2d1a053f9d, 0x50124be52a30b6e4,
+	0x1f423fcee22f9be0, 0x659a4f06d21a1299, 0xeaf2de5e82448912, 0x902aae96b271006b,
+	0x74523609127ad31a, 0x0e8a46c1224f5a63, 0x81e2d7997211c1e8, 0xfb3aa75142244891,
+	0xb46ad37a8a3b6595, 0xceb2a3b2ba0eecec, 0x41da32eaea507767, 0x3b024222da65fe1e,
+	0xa2722586f2d042ee, 0xd8aa554ec2e5cb97, 0x57c2c41692bb501c, 0x2d1ab4dea28ed965,
+	0x624ac0f56a91f461, 0x1892b03d5aa47d18, 0x97fa21650afae693, 0xed2251ad3acf6fea,
+	0x095ac9329ac4bc9b, 0x7382b9faaaf135e2, 0xfcea28a2faafae69, 0x8632586aca9a2710,
+	0xc9622c4102850a14, 0xb3ba5c8932b0836d, 0x3cd2cdd162ee18e6, 0x460abd1952db919f,
+	0x256b24ca6b12f26d, 0x5fb354025b277b14, 0xd0dbc55a0b79e09f, 0xaa03b5923b4c69e6,
+	0xe553c1b9f35344e2, 0x9f8bb171c366cd9b, 0x10e3202993385610, 0x6a3b50e1a30ddf69,
+	0x8e43c87e03060c18, 0xf49bb8b633338561, 0x7bf329ee636d1eea, 0x012b592653589793,
+	0x4e7b2d0d9b47ba97, 0x34a35dc5ab7233ee, 0xbbcbcc9dfb2ca865, 0xc113bc55cb19211c,
+	0x5863dbf1e3ac9dec, 0x22bbab39d3991495, 0xadd33a6183c78f1e, 0xd70b4aa9b3f20667,
+	0x985b3e827bed2b63, 0xe2834e4a4bd8a21a, 0x6debdf121b863991, 0x1733afda2bb3b0e8,
+	0xf34b37458bb86399, 0x8993478dbb8deae0, 0x06fbd6d5ebd3716b, 0x7c23a61ddbe6f812,
+	0x3373d23613f9d516, 0x49aba2fe23cc5c6f, 0xc6c333a67392c7e4, 0xbc1b436e43a74e9d,
+	0x95ac9329ac4bc9b5, 0xef74e3e19c7e40cc, 0x601c72b9cc20db47, 0x1ac40271fc15523e,
+	0x5594765a340a7f3a, 0x2f4c0692043ff643, 0xa02497ca54616dc8, 0xdafce7026454e4b1,
+	0x3e847f9dc45f37c0, 0x445c0f55f46abeb9, 0xcb349e0da4342532, 0xb1eceec59401ac4b,
+	0xfebc9aee5c1e814f, 0x8464ea266c2b0836, 0x0b0c7b7e3c7593bd, 0x71d40bb60c401ac4,
+	0xe8a46c1224f5a634, 0x927c1cda14c02f4d, 0x1d148d82449eb4c6, 0x67ccfd4a74ab3dbf,
+	0x289c8961bcb410bb, 0x5244f9a98c8199c2, 0xdd2c68f1dcdf0249, 0xa7f41839ecea8b30,
+	0x438c80a64ce15841, 0x3954f06e7cd4d138, 0xb63c61362c8a4ab3, 0xcce411fe1cbfc3ca,
+	0x83b465d5d4a0eece, 0xf96c151de49567b7, 0x76048445b4cbfc3c, 0x0cdcf48d84fe7545,
+	0x6fbd6d5ebd3716b7, 0x15651d968d029fce, 0x9a0d8ccedd5c0445, 0xe0d5fc06ed698d3c,
+	0xaf85882d2576a038, 0xd55df8e515432941, 0x5a3569bd451db2ca, 0x20ed197575283bb3,
+	0xc49581ead523e8c2, 0xbe4df122e51661bb, 0x3125607ab548fa30, 0x4bfd10b2857d7349,
+	0x04ad64994d625e4d, 0x7e7514517d57d734, 0xf11d85092d094cbf, 0x8bc5f5c11d3cc5c6,
+	0x12b5926535897936, 0x686de2ad05bcf04f, 0xe70573f555e26bc4, 0x9ddd033d65d7e2bd,
+	0xd28d7716adc8cfb9, 0xa85507de9dfd46c0, 0x273d9686cda3dd4b, 0x5de5e64efd965432,
+	0xb99d7ed15d9d8743, 0xc3450e196da80e3a, 0x4c2d9f413df695b1, 0x36f5ef890dc31cc8,
+	0x79a59ba2c5dc31cc, 0x037deb6af5e9b8b5, 0x8c157a32a5b7233e, 0xf6cd0afa9582aa47,
+	0x4ad64994d625e4da, 0x300e395ce6106da3, 0xbf66a804b64ef628, 0xc5bed8cc867b7f51,
+	0x8aeeace74e645255, 0xf036dc2f7e51db2c, 0x7f5e4d772e0f40a7, 0x05863dbf1e3ac9de,
+	0xe1fea520be311aaf, 0x9b26d5e88e0493d6, 0x144e44b0de5a085d, 0x6e963478ee6f8124,
+	0x21c640532670ac20, 0x5b1e309b16452559, 0xd476a1c3461bbed2, 0xaeaed10b762e37ab,
+	0x37deb6af5e9b8b5b, 0x4d06c6676eae0222, 0xc26e573f3ef099a9, 0xb8b627f70ec510d0,
+	0xf7e653dcc6da3dd4, 0x8d3e2314f6efb4ad, 0x0256b24ca6b12f26, 0x788ec2849684a65f,
+	0x9cf65a1b368f752e, 0xe62e2ad306bafc57, 0x6946bb8b56e467dc, 0x139ecb4366d1eea5,
+	0x5ccebf68aecec3a1, 0x2616cfa09efb4ad8, 0xa97e5ef8cea5d153, 0xd3a62e30fe90582a,
+	0xb0c7b7e3c7593bd8, 0xca1fc72bf76cb2a1, 0x45775673a732292a, 0x3faf26bb9707a053,
+	0x70ff52905f188d57, 0x0a2722586f2d042e, 0x854fb3003f739fa5, 0xff97c3c80f4616dc,
+	0x1bef5b57af4dc5ad, 0x61372b9f9f784cd4, 0xee5fbac7cf26d75f, 0x9487ca0fff135e26,
+	0xdbd7be24370c7322, 0xa10fceec0739fa5b, 0x2e675fb4576761d0, 0x54bf2f7c6752e8a9,
+	0xcdcf48d84fe75459, 0xb71738107fd2dd20, 0x387fa9482f8c46ab, 0x42a7d9801fb9cfd2,
+	0x0df7adabd7a6e2d6, 0x772fdd63e7936baf, 0xf8474c3bb7cdf024, 0x829f3cf387f8795d,
+	0x66e7a46c27f3aa2c, 0x1c3fd4a417c62355, 0x935745fc4798b8de, 0xe98f353477ad31a7,
+	0xa6df411fbfb21ca3, 0xdc0731d78f8795da, 0x536fa08fdfd90e51, 0x29b7d047efec8728}
+
+type digest struct {
+	crc uint64
+}
+
+func (d *digest) update(p []byte) {
+	for _, b := range p {
+		d.crc = crc64_table[byte(d.crc)^b] ^ (d.crc >> 8)
+	}
+}
+
+func newDigest() hash.Hash64 {
+	d := &digest{}
+	return d
+}
+
+func (d *digest) Write(p []byte) (int, error) {
+	d.update(p)
+	return len(p), nil
+}
+
+func (d *digest) Sum(in []byte) []byte {
+	buf := make([]byte, 8)
+	binary.LittleEndian.PutUint64(buf, d.crc)
+	return append(in, buf...)
+}
+
+func (d *digest) Sum64() uint64  { return d.crc }
+func (d *digest) BlockSize() int { return 1 }
+func (d *digest) Size() int      { return 8 }
+func (d *digest) Reset()         { d.crc = 0 }

vendor/github.com/siddontang/rdb/encode.go

@@ -0,0 +1,52 @@
+package rdb
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/cupcake/rdb"
+)
+
+func Dump(obj interface{}) ([]byte, error) {
+	var buf bytes.Buffer
+
+	e := rdb.NewEncoder(&buf)
+
+	switch v := obj.(type) {
+	case String:
+		e.EncodeType(rdb.TypeString)
+		e.EncodeString(v)
+	case Hash:
+		e.EncodeType(rdb.TypeHash)
+		e.EncodeLength(uint32(len(v)))
+
+		for i := 0; i < len(v); i++ {
+			e.EncodeString(v[i].Field)
+			e.EncodeString(v[i].Value)
+		}
+	case List:
+		e.EncodeType(rdb.TypeList)
+		e.EncodeLength(uint32(len(v)))
+		for i := 0; i < len(v); i++ {
+			e.EncodeString(v[i])
+		}
+	case Set:
+		e.EncodeType(rdb.TypeSet)
+		e.EncodeLength(uint32(len(v)))
+		for i := 0; i < len(v); i++ {
+			e.EncodeString(v[i])
+		}
+	case ZSet:
+		e.EncodeType(rdb.TypeZSet)
+		e.EncodeLength(uint32(len(v)))
+		for i := 0; i < len(v); i++ {
+			e.EncodeString(v[i].Member)
+			e.EncodeFloat(v[i].Score)
+		}
+	default:
+		return nil, fmt.Errorf("invalid dump type %T", obj)
+	}
+
+	e.EncodeDumpFooter()
+
+	return buf.Bytes(), nil
+}

vendor/github.com/siddontang/rdb/loader.go

@@ -0,0 +1,112 @@
+// Copyright 2014 Wandoujia Inc. All Rights Reserved.
+// Licensed under the MIT (MIT-LICENSE.txt) license.
+
+package rdb
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"hash"
+	"io"
+	"strconv"
+)
+
+type Loader struct {
+	*rdbReader
+	crc hash.Hash64
+	db  uint32
+}
+
+func NewLoader(r io.Reader) *Loader {
+	l := &Loader{}
+	l.crc = newDigest()
+	l.rdbReader = newRdbReader(io.TeeReader(r, l.crc))
+	return l
+}
+
+func (l *Loader) LoadHeader() error {
+	header := make([]byte, 9)
+	if err := l.readFull(header); err != nil {
+		return err
+	}
+	if !bytes.Equal(header[:5], []byte("REDIS")) {
+		return fmt.Errorf("verify magic string, invalid file format")
+	}
+	if version, err := strconv.ParseInt(string(header[5:]), 10, 64); err != nil {
+		return err
+	} else if version <= 0 || version > Version {
+		return fmt.Errorf("verify version, invalid RDB version number %d", version)
+	}
+	return nil
+}
+
+func (l *Loader) LoadChecksum() error {
+	crc1 := l.crc.Sum64()
+	if crc2, err := l.readUint64(); err != nil {
+		return err
+	} else if crc1 != crc2 {
+		return fmt.Errorf("checksum validation failed")
+	}
+	return nil
+}
+
+type Entry struct {
+	DB       uint32
+	Key      []byte
+	ValDump  []byte
+	ExpireAt uint64
+}
+
+func (l *Loader) LoadEntry() (entry *Entry, err error) {
+	var expireat uint64
+	for {
+		var otype byte
+		if otype, err = l.readByte(); err != nil {
+			return
+		}
+		switch otype {
+		case rdbFlagExpiryMS:
+			if expireat, err = l.readUint64(); err != nil {
+				return
+			}
+		case rdbFlagExpiry:
+			var sec uint32
+			if sec, err = l.readUint32(); err != nil {
+				return
+			}
+			expireat = uint64(sec) * 1000
+		case rdbFlagSelectDB:
+			if l.db, err = l.readLength(); err != nil {
+				return
+			}
+		case rdbFlagEOF:
+			return
+		default:
+			var key, obj []byte
+			if key, err = l.readString(); err != nil {
+				return
+			}
+			if obj, err = l.readObject(otype); err != nil {
+				return
+			}
+			entry = &Entry{}
+			entry.DB = l.db
+			entry.Key = key
+			entry.ValDump = createValDump(otype, obj)
+			entry.ExpireAt = expireat
+			return
+		}
+	}
+}
+
+func createValDump(otype byte, obj []byte) []byte {
+	var b bytes.Buffer
+	c := newDigest()
+	w := io.MultiWriter(&b, c)
+	w.Write([]byte{otype})
+	w.Write(obj)
+	binary.Write(w, binary.LittleEndian, uint16(Version))
+	binary.Write(w, binary.LittleEndian, c.Sum64())
+	return b.Bytes()
+}

vendor/github.com/siddontang/rdb/reader.go

@@ -0,0 +1,332 @@
+// Copyright 2014 Wandoujia Inc. All Rights Reserved.
+// Licensed under the MIT (MIT-LICENSE.txt) license.
+
+package rdb
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math"
+	"strconv"
+)
+
+const (
+	Version = 6
+)
+
+const (
+	rdbTypeString = 0
+	rdbTypeList   = 1
+	rdbTypeSet    = 2
+	rdbTypeZSet   = 3
+	rdbTypeHash   = 4
+
+	rdbTypeHashZipmap  = 9
+	rdbTypeListZiplist = 10
+	rdbTypeSetIntset   = 11
+	rdbTypeZSetZiplist = 12
+	rdbTypeHashZiplist = 13
+
+	rdbFlagExpiryMS = 0xfc
+	rdbFlagExpiry   = 0xfd
+	rdbFlagSelectDB = 0xfe
+	rdbFlagEOF      = 0xff
+)
+
+const (
+	rdb6bitLen  = 0
+	rdb14bitLen = 1
+	rdb32bitLen = 2
+	rdbEncVal   = 3
+
+	rdbEncInt8  = 0
+	rdbEncInt16 = 1
+	rdbEncInt32 = 2
+	rdbEncLZF   = 3
+
+	rdbZiplist6bitlenString  = 0
+	rdbZiplist14bitlenString = 1
+	rdbZiplist32bitlenString = 2
+
+	rdbZiplistInt16 = 0xc0
+	rdbZiplistInt32 = 0xd0
+	rdbZiplistInt64 = 0xe0
+	rdbZiplistInt24 = 0xf0
+	rdbZiplistInt8  = 0xfe
+	rdbZiplistInt4  = 15
+)
+
+type rdbReader struct {
+	raw   io.Reader
+	buf   [8]byte
+	nread int64
+}
+
+func newRdbReader(r io.Reader) *rdbReader {
+	return &rdbReader{raw: r}
+}
+
+func (r *rdbReader) Read(p []byte) (int, error) {
+	n, err := r.raw.Read(p)
+	r.nread += int64(n)
+	return n, err
+}
+
+func (r *rdbReader) offset() int64 {
+	return r.nread
+}
+
+func (r *rdbReader) readObject(otype byte) ([]byte, error) {
+	var b bytes.Buffer
+	r = newRdbReader(io.TeeReader(r, &b))
+	switch otype {
+	default:
+		return nil, fmt.Errorf("unknown object-type %02x", otype)
+	case rdbTypeHashZipmap:
+		fallthrough
+	case rdbTypeListZiplist:
+		fallthrough
+	case rdbTypeSetIntset:
+		fallthrough
+	case rdbTypeZSetZiplist:
+		fallthrough
+	case rdbTypeHashZiplist:
+		fallthrough
+	case rdbTypeString:
+		if _, err := r.readString(); err != nil {
+			return nil, err
+		}
+	case rdbTypeList, rdbTypeSet:
+		if n, err := r.readLength(); err != nil {
+			return nil, err
+		} else {
+			for i := 0; i < int(n); i++ {
+				if _, err := r.readString(); err != nil {
+					return nil, err
+				}
+			}
+		}
+	case rdbTypeZSet:
+		if n, err := r.readLength(); err != nil {
+			return nil, err
+		} else {
+			for i := 0; i < int(n); i++ {
+				if _, err := r.readString(); err != nil {
+					return nil, err
+				}
+				if _, err := r.readFloat(); err != nil {
+					return nil, err
+				}
+			}
+		}
+	case rdbTypeHash:
+		if n, err := r.readLength(); err != nil {
+			return nil, err
+		} else {
+			for i := 0; i < int(n); i++ {
+				if _, err := r.readString(); err != nil {
+					return nil, err
+				}
+				if _, err := r.readString(); err != nil {
+					return nil, err
+				}
+			}
+		}
+	}
+	return b.Bytes(), nil
+}
+
+func (r *rdbReader) readString() ([]byte, error) {
+	length, encoded, err := r.readEncodedLength()
+	if err != nil {
+		return nil, err
+	}
+	if !encoded {
+		return r.readBytes(int(length))
+	}
+	switch t := uint8(length); t {
+	default:
+		return nil, fmt.Errorf("invalid encoded-string %02x", t)
+	case rdbEncInt8:
+		i, err := r.readInt8()
+		return []byte(strconv.FormatInt(int64(i), 10)), err
+	case rdbEncInt16:
+		i, err := r.readInt16()
+		return []byte(strconv.FormatInt(int64(i), 10)), err
+	case rdbEncInt32:
+		i, err := r.readInt32()
+		return []byte(strconv.FormatInt(int64(i), 10)), err
+	case rdbEncLZF:
+		var inlen, outlen uint32
+		if inlen, err = r.readLength(); err != nil {
+			return nil, err
+		}
+		if outlen, err = r.readLength(); err != nil {
+			return nil, err
+		}
+		if in, err := r.readBytes(int(inlen)); err != nil {
+			return nil, err
+		} else {
+			return lzfDecompress(in, int(outlen))
+		}
+	}
+}
+
+func (r *rdbReader) readEncodedLength() (length uint32, encoded bool, err error) {
+	var u uint8
+	if u, err = r.readUint8(); err != nil {
+		return
+	}
+	length = uint32(u & 0x3f)
+	switch u >> 6 {
+	case rdb6bitLen:
+	case rdb14bitLen:
+		u, err = r.readUint8()
+		length = (length << 8) + uint32(u)
+	case rdbEncVal:
+		encoded = true
+	default:
+		length, err = r.readUint32BigEndian()
+	}
+	return
+}
+
+func (r *rdbReader) readLength() (uint32, error) {
+	length, encoded, err := r.readEncodedLength()
+	if err == nil && encoded {
+		err = fmt.Errorf("encoded-length")
+	}
+	return length, err
+}
+
+func (r *rdbReader) readFloat() (float64, error) {
+	u, err := r.readUint8()
+	if err != nil {
+		return 0, err
+	}
+	switch u {
+	case 253:
+		return math.NaN(), nil
+	case 254:
+		return math.Inf(0), nil
+	case 255:
+		return math.Inf(-1), nil
+	default:
+		if b, err := r.readBytes(int(u)); err != nil {
+			return 0, err
+		} else {
+			v, err := strconv.ParseFloat(string(b), 64)
+			return v, err
+		}
+	}
+}
+
+func (r *rdbReader) readByte() (byte, error) {
+	b := r.buf[:1]
+	_, err := r.Read(b)
+	return b[0], err
+}
+
+func (r *rdbReader) readFull(p []byte) error {
+	_, err := io.ReadFull(r, p)
+	return err
+}
+
+func (r *rdbReader) readBytes(n int) ([]byte, error) {
+	p := make([]byte, n)
+	return p, r.readFull(p)
+}
+
+func (r *rdbReader) readUint8() (uint8, error) {
+	b, err := r.readByte()
+	return uint8(b), err
+}
+
+func (r *rdbReader) readUint16() (uint16, error) {
+	b := r.buf[:2]
+	err := r.readFull(b)
+	return binary.LittleEndian.Uint16(b), err
+}
+
+func (r *rdbReader) readUint32() (uint32, error) {
+	b := r.buf[:4]
+	err := r.readFull(b)
+	return binary.LittleEndian.Uint32(b), err
+}
+
+func (r *rdbReader) readUint64() (uint64, error) {
+	b := r.buf[:8]
+	err := r.readFull(b)
+	return binary.LittleEndian.Uint64(b), err
+}
+
+func (r *rdbReader) readUint32BigEndian() (uint32, error) {
+	b := r.buf[:4]
+	err := r.readFull(b)
+	return binary.BigEndian.Uint32(b), err
+}
+
+func (r *rdbReader) readInt8() (int8, error) {
+	u, err := r.readUint8()
+	return int8(u), err
+}
+
+func (r *rdbReader) readInt16() (int16, error) {
+	u, err := r.readUint16()
+	return int16(u), err
+}
+
+func (r *rdbReader) readInt32() (int32, error) {
+	u, err := r.readUint32()
+	return int32(u), err
+}
+
+func (r *rdbReader) readInt64() (int64, error) {
+	u, err := r.readUint64()
+	return int64(u), err
+}
+
+func (r *rdbReader) readInt32BigEndian() (int32, error) {
+	u, err := r.readUint32BigEndian()
+	return int32(u), err
+}
+
+func lzfDecompress(in []byte, outlen int) (out []byte, err error) {
+	defer func() {
+		if x := recover(); x != nil {
+			err = fmt.Errorf("decompress exception: %v", x)
+		}
+	}()
+	out = make([]byte, outlen)
+	i, o := 0, 0
+	for i < len(in) {
+		ctrl := int(in[i])
+		i++
+		if ctrl < 32 {
+			for x := 0; x <= ctrl; x++ {
+				out[o] = in[i]
+				i++
+				o++
+			}
+		} else {
+			length := ctrl >> 5
+			if length == 7 {
+				length = length + int(in[i])
+				i++
+			}
+			ref := o - ((ctrl & 0x1f) << 8) - int(in[i]) - 1
+			i++
+			for x := 0; x <= length+1; x++ {
+				out[o] = out[ref]
+				ref++
+				o++
+			}
+		}
+	}
+	if o != outlen {
+		return nil, fmt.Errorf("decompress length is %d != expected %d", o, outlen)
+	}
+	return out, nil
+}