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packer.go
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packer.go
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// Copyright 2013-2017 Aerospike, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package aerospike
import (
"bytes"
"encoding/binary"
"fmt"
"math"
"reflect"
"time"
ParticleType "github.com/aerospike/aerospike-client-go/types/particle_type"
Buffer "github.com/aerospike/aerospike-client-go/utils/buffer"
)
var __packObjectReflect func(BufferEx, interface{}, bool) (int, error)
func __PackIfcList(cmd BufferEx, list []interface{}) (int, error) {
size := 0
n, err := __PackArrayBegin(cmd, len(list))
if err != nil {
return n, err
}
size += n
for i := range list {
n, err := __PackObject(cmd, list[i], false)
if err != nil {
return 0, err
}
size += n
}
return size, err
}
// PackList packs any slice that implement the ListIter interface
func PackList(cmd BufferEx, list ListIter) (int, error) {
return __PackList(cmd, list)
}
func __PackList(cmd BufferEx, list ListIter) (int, error) {
size := 0
n, err := __PackArrayBegin(cmd, list.Len())
if err != nil {
return n, err
}
size += n
n, err = list.PackList(cmd)
return size + n, err
}
func __PackValueArray(cmd BufferEx, list ValueArray) (int, error) {
size := 0
n, err := __PackArrayBegin(cmd, len(list))
if err != nil {
return n, err
}
size += n
for i := range list {
n, err := list[i].pack(cmd)
if err != nil {
return 0, err
}
size += n
}
return size, err
}
func __PackArrayBegin(cmd BufferEx, size int) (int, error) {
if size < 16 {
return __PackAByte(cmd, 0x90|byte(size))
} else if size <= math.MaxUint16 {
return __PackShort(cmd, 0xdc, int16(size))
} else {
return __PackInt(cmd, 0xdd, int32(size))
}
}
func __PackIfcMap(cmd BufferEx, theMap map[interface{}]interface{}) (int, error) {
size := 0
n, err := __PackMapBegin(cmd, len(theMap))
if err != nil {
return n, err
}
size += n
for k, v := range theMap {
n, err := __PackObject(cmd, k, true)
if err != nil {
return 0, err
}
size += n
n, err = __PackObject(cmd, v, false)
if err != nil {
return 0, err
}
size += n
}
return size, err
}
// PackJson packs json data
func PackJson(cmd BufferEx, theMap map[string]interface{}) (int, error) {
return __PackJsonMap(cmd, theMap)
}
func __PackJsonMap(cmd BufferEx, theMap map[string]interface{}) (int, error) {
size := 0
n, err := __PackMapBegin(cmd, len(theMap))
if err != nil {
return n, err
}
size += n
for k, v := range theMap {
n, err := __PackString(cmd, k)
if err != nil {
return 0, err
}
size += n
n, err = __PackObject(cmd, v, false)
if err != nil {
return 0, err
}
size += n
}
return size, err
}
// PackMap packs any map that implements the MapIter interface
func PackMap(cmd BufferEx, theMap MapIter) (int, error) {
return __PackMap(cmd, theMap)
}
func __PackMap(cmd BufferEx, theMap MapIter) (int, error) {
size := 0
n, err := __PackMapBegin(cmd, theMap.Len())
if err != nil {
return n, err
}
size += n
n, err = theMap.PackMap(cmd)
return size + n, err
}
func __PackMapBegin(cmd BufferEx, size int) (int, error) {
if size < 16 {
return __PackAByte(cmd, 0x80|byte(size))
} else if size <= math.MaxUint16 {
return __PackShort(cmd, 0xde, int16(size))
} else {
return __PackInt(cmd, 0xdf, int32(size))
}
}
// PackBytes backs a byte array
func PackBytes(cmd BufferEx, b []byte) (int, error) {
return __PackBytes(cmd, b)
}
func __PackBytes(cmd BufferEx, b []byte) (int, error) {
size := 0
n, err := __PackByteArrayBegin(cmd, len(b)+1)
if err != nil {
return n, err
}
size += n
n, err = __PackAByte(cmd, ParticleType.BLOB)
if err != nil {
return size + n, err
}
size += n
n, err = __PackByteArray(cmd, b)
if err != nil {
return size + n, err
}
size += n
return size, nil
}
func __PackByteArrayBegin(cmd BufferEx, length int) (int, error) {
if length < 32 {
return __PackAByte(cmd, 0xa0|byte(length))
} else if length < 65536 {
return __PackShort(cmd, 0xda, int16(length))
} else {
return __PackInt(cmd, 0xdb, int32(length))
}
}
func __PackObject(cmd BufferEx, obj interface{}, mapKey bool) (int, error) {
switch v := obj.(type) {
case Value:
return v.pack(cmd)
case []Value:
return ValueArray(v).pack(cmd)
case string:
return __PackString(cmd, v)
case []byte:
return __PackBytes(cmd, obj.([]byte))
case int8:
return __PackAInt(cmd, int(v))
case uint8:
return __PackAInt(cmd, int(v))
case int16:
return __PackAInt(cmd, int(v))
case uint16:
return __PackAInt(cmd, int(v))
case int32:
return __PackAInt(cmd, int(v))
case uint32:
return __PackAInt(cmd, int(v))
case int:
if Buffer.Arch32Bits {
return __PackAInt(cmd, v)
}
return __PackAInt64(cmd, int64(v))
case uint:
if Buffer.Arch32Bits {
return __PackAInt(cmd, int(v))
}
return __PackAUInt64(cmd, uint64(v))
case int64:
return __PackAInt64(cmd, v)
case uint64:
return __PackAUInt64(cmd, v)
case time.Time:
return __PackAInt64(cmd, v.UnixNano())
case nil:
return __PackNil(cmd)
case bool:
return __PackBool(cmd, v)
case float32:
return __PackFloat32(cmd, v)
case float64:
return __PackFloat64(cmd, v)
case struct{}:
if mapKey {
panic(fmt.Sprintf("Maps, Slices, and bounded arrays other than Bounded Byte Arrays are not supported as Map keys. Value: %#v", v))
}
return __PackIfcMap(cmd, map[interface{}]interface{}{})
case []interface{}:
if mapKey {
panic(fmt.Sprintf("Maps, Slices, and bounded arrays other than Bounded Byte Arrays are not supported as Map keys. Value: %#v", v))
}
return __PackIfcList(cmd, v)
case map[interface{}]interface{}:
if mapKey {
panic(fmt.Sprintf("Maps, Slices, and bounded arrays other than Bounded Byte Arrays are not supported as Map keys. Value: %#v", v))
}
return __PackIfcMap(cmd, v)
case ListIter:
if mapKey {
panic(fmt.Sprintf("Maps, Slices, and bounded arrays other than Bounded Byte Arrays are not supported as Map keys. Value: %#v", v))
}
return __PackList(cmd, obj.(ListIter))
case MapIter:
if mapKey {
panic(fmt.Sprintf("Maps, Slices, and bounded arrays other than Bounded Byte Arrays are not supported as Map keys. Value: %#v", v))
}
return __PackMap(cmd, obj.(MapIter))
}
// try to see if the object is convertible to a concrete value.
// This will be faster and much more memory efficient than reflection.
if v := tryConcreteValue(obj); v != nil {
return v.pack(cmd)
}
if __packObjectReflect != nil {
return __packObjectReflect(cmd, obj, mapKey)
}
panic(fmt.Sprintf("Type `%v (%s)` not supported to pack. ", obj, reflect.TypeOf(obj).String()))
}
func __PackAUInt64(cmd BufferEx, val uint64) (int, error) {
return __PackUInt64(cmd, val)
}
func __PackAInt64(cmd BufferEx, val int64) (int, error) {
if val >= 0 {
if val < 128 {
return __PackAByte(cmd, byte(val))
}
if val <= math.MaxUint8 {
return __PackByte(cmd, 0xcc, byte(val))
}
if val <= math.MaxUint16 {
return __PackShort(cmd, 0xcd, int16(val))
}
if val <= math.MaxUint32 {
return __PackInt(cmd, 0xce, int32(val))
}
return __PackInt64(cmd, 0xd3, val)
} else {
if val >= -32 {
return __PackAByte(cmd, 0xe0|(byte(val)+32))
}
if val >= math.MinInt8 {
return __PackByte(cmd, 0xd0, byte(val))
}
if val >= math.MinInt16 {
return __PackShort(cmd, 0xd1, int16(val))
}
if val >= math.MinInt32 {
return __PackInt(cmd, 0xd2, int32(val))
}
return __PackInt64(cmd, 0xd3, val)
}
}
// PackInt64 packs an int64
func PackInt64(cmd BufferEx, val int64) (int, error) {
return __PackAInt64(cmd, val)
}
func __PackAInt(cmd BufferEx, val int) (int, error) {
return __PackAInt64(cmd, int64(val))
}
// PackString packs a string
func PackString(cmd BufferEx, val string) (int, error) {
return __PackString(cmd, val)
}
func __PackString(cmd BufferEx, val string) (int, error) {
size := 0
slen := len(val) + 1
n, err := __PackByteArrayBegin(cmd, slen)
if err != nil {
return n, err
}
size += n
if cmd != nil {
n, err = 1, cmd.WriteByte(byte(ParticleType.STRING))
if err != nil {
return size + n, err
}
size += n
n, err = cmd.WriteString(val)
if err != nil {
return size + n, err
}
size += n
} else {
size += 1 + len(val)
}
return size, nil
}
func __PackGeoJson(cmd BufferEx, val string) (int, error) {
size := 0
slen := len(val) + 1
n, err := __PackByteArrayBegin(cmd, slen)
if err != nil {
return n, err
}
size += n
if cmd != nil {
n, err = 1, cmd.WriteByte(byte(ParticleType.GEOJSON))
if err != nil {
return size + n, err
}
size += n
n, err = cmd.WriteString(val)
if err != nil {
return size + n, err
}
size += n
} else {
size += 1 + len(val)
}
return size, nil
}
func __PackByteArray(cmd BufferEx, src []byte) (int, error) {
if cmd != nil {
return cmd.Write(src)
}
return len(src), nil
}
func __PackInt64(cmd BufferEx, valType int, val int64) (int, error) {
if cmd != nil {
size, err := 1, cmd.WriteByte(byte(valType))
if err != nil {
return size, err
}
n, err := cmd.WriteInt64(val)
return size + n, err
}
return 1 + 8, nil
}
// PackUInt64 packs a uint64
func PackUInt64(cmd BufferEx, val uint64) (int, error) {
return __PackUInt64(cmd, val)
}
func __PackUInt64(cmd BufferEx, val uint64) (int, error) {
if cmd != nil {
size, err := 1, cmd.WriteByte(byte(0xcf))
if err != nil {
return size, err
}
n, err := cmd.WriteInt64(int64(val))
return size + n, err
}
return 1 + 8, nil
}
func __PackInt(cmd BufferEx, valType int, val int32) (int, error) {
if cmd != nil {
size, err := 1, cmd.WriteByte(byte(valType))
if err != nil {
return size, err
}
n, err := cmd.WriteInt32(val)
return size + n, err
}
return 1 + 4, nil
}
func __PackShort(cmd BufferEx, valType int, val int16) (int, error) {
if cmd != nil {
size, err := 1, cmd.WriteByte(byte(valType))
if err != nil {
return size, err
}
n, err := cmd.WriteInt16(val)
return size + n, err
}
return 1 + 2, nil
}
// This method is not compatible with MsgPack specs and is only used by aerospike client<->server
// for wire transfer only
func __PackShortRaw(cmd BufferEx, val int16) (int, error) {
if cmd != nil {
return cmd.WriteInt16(val)
}
return 2, nil
}
func __PackByte(cmd BufferEx, valType int, val byte) (int, error) {
if cmd != nil {
size := 0
n, err := 1, cmd.WriteByte(byte(valType))
if err != nil {
return n, err
}
size += n
n, err = 1, cmd.WriteByte(val)
if err != nil {
return size + n, err
}
size += n
return size, nil
}
return 1 + 1, nil
}
// Pack nil packs a nil value
func PackNil(cmd BufferEx) (int, error) {
return __PackNil(cmd)
}
func __PackNil(cmd BufferEx) (int, error) {
if cmd != nil {
return 1, cmd.WriteByte(0xc0)
}
return 1, nil
}
// Pack bool packs a bool value
func PackBool(cmd BufferEx, val bool) (int, error) {
return __PackBool(cmd, val)
}
func __PackBool(cmd BufferEx, val bool) (int, error) {
if cmd != nil {
if val {
return 1, cmd.WriteByte(0xc3)
}
return 1, cmd.WriteByte(0xc2)
}
return 1, nil
}
// PackFloat32 packs float32 value
func PackFloat32(cmd BufferEx, val float32) (int, error) {
return __PackFloat32(cmd, val)
}
func __PackFloat32(cmd BufferEx, val float32) (int, error) {
if cmd != nil {
size := 0
n, err := 1, cmd.WriteByte(0xca)
if err != nil {
return n, err
}
size += n
n, err = cmd.WriteFloat32(val)
return size + n, err
}
return 1 + 4, nil
}
// PackFloat64 packs float64 value
func PackFloat64(cmd BufferEx, val float64) (int, error) {
return __PackFloat64(cmd, val)
}
func __PackFloat64(cmd BufferEx, val float64) (int, error) {
if cmd != nil {
size := 0
n, err := 1, cmd.WriteByte(0xcb)
if err != nil {
return n, err
}
size += n
n, err = cmd.WriteFloat64(val)
return size + n, err
}
return 1 + 8, nil
}
func __PackAByte(cmd BufferEx, val byte) (int, error) {
if cmd != nil {
return 1, cmd.WriteByte(val)
}
return 1, nil
}
// packer implements a buffered packer
type packer struct {
bytes.Buffer
tempBuffer [8]byte
}
func newPacker() *packer {
return &packer{}
}
// Int64ToBytes converts an int64 into slice of Bytes.
func (vb *packer) WriteInt64(num int64) (int, error) {
return vb.WriteUint64(uint64(num))
}
// Uint64ToBytes converts an uint64 into slice of Bytes.
func (vb *packer) WriteUint64(num uint64) (int, error) {
binary.BigEndian.PutUint64(vb.tempBuffer[:8], num)
vb.Write(vb.tempBuffer[:8])
return 8, nil
}
// Int32ToBytes converts an int32 to a byte slice of size 4
func (vb *packer) WriteInt32(num int32) (int, error) {
return vb.WriteUint32(uint32(num))
}
// Uint32ToBytes converts an uint32 to a byte slice of size 4
func (vb *packer) WriteUint32(num uint32) (int, error) {
binary.BigEndian.PutUint32(vb.tempBuffer[:4], num)
vb.Write(vb.tempBuffer[:4])
return 4, nil
}
// Int16ToBytes converts an int16 to slice of bytes
func (vb *packer) WriteInt16(num int16) (int, error) {
return vb.WriteUint16(uint16(num))
}
// UInt16ToBytes converts an iuint16 to slice of bytes
func (vb *packer) WriteUint16(num uint16) (int, error) {
binary.BigEndian.PutUint16(vb.tempBuffer[:2], num)
vb.Write(vb.tempBuffer[:2])
return 2, nil
}
func (vb *packer) WriteFloat32(float float32) (int, error) {
bits := math.Float32bits(float)
binary.BigEndian.PutUint32(vb.tempBuffer[:4], bits)
vb.Write(vb.tempBuffer[:4])
return 4, nil
}
func (vb *packer) WriteFloat64(float float64) (int, error) {
bits := math.Float64bits(float)
binary.BigEndian.PutUint64(vb.tempBuffer[:8], bits)
vb.Write(vb.tempBuffer[:8])
return 8, nil
}
func (vb *packer) WriteByte(b byte) error {
_, err := vb.Write([]byte{b})
return err
}
func (vb *packer) WriteString(s string) (int, error) {
// To avoid allocating memory, write the strings in small chunks
l := len(s)
const size = 128
b := [size]byte{}
cnt := 0
for i := 0; i < l; i++ {
b[cnt] = s[i]
cnt++
if cnt == size {
vb.Write(b[:])
cnt = 0
}
}
if cnt > 0 {
vb.Write(b[:cnt])
}
return len(s), nil
}