2019-10-04 12:28:45 +02:00
|
|
|
package ssob
|
|
|
|
|
|
|
|
import (
|
|
|
|
"encoding/binary"
|
|
|
|
"errors"
|
|
|
|
"reflect"
|
|
|
|
)
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalString(in string) (ret []byte) {
|
2019-10-05 01:42:09 +02:00
|
|
|
l := int32(len(in))
|
|
|
|
b := MarshalInt32(l)
|
|
|
|
ret = make([]byte, int(l)+len(b))
|
|
|
|
copy(ret, b)
|
|
|
|
copy(ret[4:], []byte(in))
|
|
|
|
return ret
|
2019-10-04 12:28:45 +02:00
|
|
|
}
|
|
|
|
|
2019-10-05 22:12:53 +02:00
|
|
|
func MarshalBool(in bool) (ret []byte) {
|
|
|
|
if in {
|
|
|
|
return []byte{byte(0)}
|
|
|
|
}
|
|
|
|
|
|
|
|
return []byte{byte(1)}
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalInt8(in int8) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
return []byte{byte(in)}
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalUint8(in uint8) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
return []byte{byte(in)}
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalInt16(in int16) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
out := make([]byte, 2)
|
|
|
|
|
|
|
|
binary.BigEndian.PutUint16(out, uint16(in))
|
|
|
|
return out
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalUint16(in uint16) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
out := make([]byte, 2)
|
|
|
|
|
|
|
|
binary.BigEndian.PutUint16(out, in)
|
|
|
|
return out
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalInt32(in int32) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
out := make([]byte, 4)
|
|
|
|
|
|
|
|
binary.BigEndian.PutUint32(out, uint32(in))
|
|
|
|
return out
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalUint32(in uint32) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
out := make([]byte, 4)
|
|
|
|
|
|
|
|
binary.BigEndian.PutUint32(out, in)
|
|
|
|
return out
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalFloat32(in float32) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
out := make([]byte, 4)
|
|
|
|
|
|
|
|
binary.BigEndian.PutUint32(out, uint32(in))
|
|
|
|
return out
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalInt64(in int64) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
out := make([]byte, 8)
|
|
|
|
|
|
|
|
binary.BigEndian.PutUint64(out, uint64(in))
|
|
|
|
return out
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalUint64(in uint64) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
out := make([]byte, 8)
|
|
|
|
|
|
|
|
binary.BigEndian.PutUint64(out, in)
|
|
|
|
return out
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
func MarshalFloat64(in float64) (ret []byte) {
|
2019-10-04 12:28:45 +02:00
|
|
|
out := make([]byte, 8)
|
|
|
|
|
|
|
|
binary.BigEndian.PutUint64(out, uint64(in))
|
|
|
|
return out
|
|
|
|
}
|
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
type MarshalFunc func(e interface{}) (ret []byte, err error)
|
2019-10-04 12:28:45 +02:00
|
|
|
|
2019-10-04 17:58:17 +02:00
|
|
|
var encoderCache map[string]MarshalFunc
|
2019-10-04 12:28:45 +02:00
|
|
|
|
|
|
|
func init() {
|
2019-10-04 17:58:17 +02:00
|
|
|
encoderCache = make(map[string]MarshalFunc)
|
2019-10-05 22:12:53 +02:00
|
|
|
RegisterEncoder("bool", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(bool); ok {
|
|
|
|
return MarshalBool(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected bool")
|
|
|
|
})
|
2019-10-05 01:42:09 +02:00
|
|
|
RegisterEncoder("int8", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(int8); ok {
|
|
|
|
return MarshalInt8(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected int8")
|
|
|
|
})
|
|
|
|
RegisterEncoder("uint8", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(uint8); ok {
|
|
|
|
return MarshalUint8(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected uint8")
|
|
|
|
})
|
|
|
|
RegisterEncoder("int16", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(int16); ok {
|
|
|
|
return MarshalInt16(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected int16")
|
|
|
|
})
|
|
|
|
RegisterEncoder("uint16", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(uint16); ok {
|
|
|
|
return MarshalUint16(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected uint16")
|
|
|
|
})
|
|
|
|
RegisterEncoder("int32", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(int32); ok {
|
|
|
|
return MarshalInt32(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected int32")
|
|
|
|
})
|
|
|
|
RegisterEncoder("uint32", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(uint32); ok {
|
|
|
|
return MarshalUint32(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected uint32")
|
|
|
|
})
|
|
|
|
RegisterEncoder("float32", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(float32); ok {
|
|
|
|
return MarshalFloat32(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected float32")
|
|
|
|
})
|
|
|
|
RegisterEncoder("int64", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(int64); ok {
|
|
|
|
return MarshalInt64(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected int64")
|
|
|
|
})
|
|
|
|
RegisterEncoder("uint64", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(uint64); ok {
|
|
|
|
return MarshalUint64(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected uint64")
|
|
|
|
})
|
|
|
|
RegisterEncoder("float64", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(float64); ok {
|
|
|
|
return MarshalFloat64(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected float64")
|
|
|
|
})
|
|
|
|
RegisterEncoder("string", func(e interface{}) (ret []byte, err error) {
|
|
|
|
if i, ok := e.(string); ok {
|
|
|
|
return MarshalString(i), nil
|
|
|
|
}
|
|
|
|
return nil, errors.New("ssob: Incompatible type - expected string")
|
|
|
|
})
|
2019-10-04 12:28:45 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
func encRegister(e interface{}) (err error) {
|
|
|
|
t := reflect.TypeOf(e)
|
|
|
|
switch t.Kind() {
|
|
|
|
case reflect.Invalid:
|
|
|
|
return errors.New("ssob: Invalid type")
|
2019-10-05 22:12:53 +02:00
|
|
|
case reflect.Array:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
|
|
|
v := reflect.ValueOf(e)
|
|
|
|
l := v.Len()
|
|
|
|
slen := MarshalInt32(int32(l))
|
|
|
|
blen := 4
|
|
|
|
bs := make([][]byte, l)
|
|
|
|
for i := 0; i < l; i++ {
|
|
|
|
bs[i], err = marshal(v.Index(i).Interface())
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
blen += len(bs[i])
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = make([]byte, blen)
|
|
|
|
i := copy(ret, slen)
|
|
|
|
for c := 0; c < l; c++ {
|
|
|
|
i += copy(ret[i:], bs[c])
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret, nil
|
|
|
|
}
|
|
|
|
encoderCache[string(t.Kind())] = f
|
2019-10-04 12:28:45 +02:00
|
|
|
case reflect.Slice:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
|
|
|
v := reflect.ValueOf(e)
|
|
|
|
l := v.Len()
|
2019-10-05 01:42:09 +02:00
|
|
|
slen := MarshalInt32(int32(l))
|
|
|
|
blen := 4
|
|
|
|
bs := make([][]byte, l)
|
2019-10-04 12:28:45 +02:00
|
|
|
for i := 0; i < l; i++ {
|
2019-10-05 01:42:09 +02:00
|
|
|
bs[i], err = marshal(v.Index(i).Interface())
|
2019-10-04 12:28:45 +02:00
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
2019-10-05 01:42:09 +02:00
|
|
|
blen += len(bs[i])
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = make([]byte, blen)
|
|
|
|
i := copy(ret, slen)
|
|
|
|
for c := 0; c < l; c++ {
|
|
|
|
i += copy(ret[i:], bs[c])
|
2019-10-04 12:28:45 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
return ret, nil
|
|
|
|
}
|
|
|
|
encoderCache[string(t.Kind())] = f
|
2019-10-05 01:42:09 +02:00
|
|
|
case reflect.Map:
|
2019-10-04 12:28:45 +02:00
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-10-05 01:42:09 +02:00
|
|
|
v := reflect.ValueOf(e)
|
|
|
|
l := v.Len()
|
|
|
|
ret = MarshalInt32(int32(l))
|
|
|
|
for _, ek := range v.MapKeys() {
|
|
|
|
ee := v.MapIndex(ek)
|
|
|
|
b, err := marshal(ek.Interface())
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
ret = append(ret, b...)
|
|
|
|
|
|
|
|
b, err = marshal(ee.Interface())
|
2019-10-04 12:28:45 +02:00
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
ret = append(ret, b...)
|
|
|
|
}
|
|
|
|
return ret, nil
|
|
|
|
}
|
2019-10-05 01:42:09 +02:00
|
|
|
encoderCache[string(t.Kind())] = f
|
|
|
|
case reflect.Struct:
|
2019-11-03 21:30:50 +01:00
|
|
|
zt := reflect.New(t)
|
|
|
|
n := zt.Elem().NumField()
|
|
|
|
mfields := []int{}
|
|
|
|
for i := 0; i < n; i++ {
|
|
|
|
if zt.Elem().Field(i).CanSet() {
|
|
|
|
mfields = append(mfields, i)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if len(mfields) == 0 {
|
|
|
|
return errors.New("ssob: No exported fields for " + string(t.Name()))
|
|
|
|
}
|
|
|
|
|
2019-10-04 12:28:45 +02:00
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-05 01:42:09 +02:00
|
|
|
bs := make([][]byte, n)
|
|
|
|
blen := 0
|
2019-11-03 21:30:50 +01:00
|
|
|
for _, i := range mfields {
|
2019-10-05 01:42:09 +02:00
|
|
|
bs[i], err = marshal(v.Field(i).Interface())
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
blen += len(bs[i])
|
2019-10-04 12:28:45 +02:00
|
|
|
}
|
2019-10-05 01:42:09 +02:00
|
|
|
ret = make([]byte, blen)
|
|
|
|
i := 0
|
|
|
|
for c := 0; c < n; c++ {
|
|
|
|
i += copy(ret[i:], bs[c])
|
2019-10-04 12:28:45 +02:00
|
|
|
}
|
2019-10-05 01:42:09 +02:00
|
|
|
return ret, nil
|
2019-10-04 12:28:45 +02:00
|
|
|
}
|
2019-10-05 01:42:09 +02:00
|
|
|
encoderCache[t.Name()] = f
|
2019-10-22 13:44:08 +02:00
|
|
|
case reflect.Bool:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(bool(v.Bool()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
|
|
|
case reflect.Uint8:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(uint8(v.Uint()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
|
|
|
case reflect.Uint16:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(uint16(v.Uint()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
|
|
|
case reflect.Uint32:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(uint32(v.Uint()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
|
|
|
case reflect.Uint64:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(uint64(v.Uint()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
|
|
|
case reflect.Int8:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(int8(v.Uint()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
|
|
|
case reflect.Int16:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(int16(v.Uint()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
|
|
|
case reflect.Int32:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(int32(v.Uint()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
|
|
|
case reflect.Int64:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(int64(v.Uint()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
|
|
|
case reflect.String:
|
|
|
|
f := func(e interface{}) (ret []byte, err error) {
|
2019-11-05 17:52:42 +01:00
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
return marshalBaseType(string(v.String()))
|
|
|
|
}
|
|
|
|
encoderCache[t.Name()] = f
|
2019-10-04 12:28:45 +02:00
|
|
|
default:
|
2019-10-22 13:44:08 +02:00
|
|
|
return errors.New("ssob: Unknown type " + string(t.Name()))
|
2019-10-04 12:28:45 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2019-10-05 01:42:09 +02:00
|
|
|
func marshalBaseType(e interface{}) (ret []byte, err error) {
|
|
|
|
switch t := e.(type) {
|
2019-10-05 22:12:53 +02:00
|
|
|
case bool:
|
|
|
|
return encoderCache["bool"](t)
|
2019-10-05 01:42:09 +02:00
|
|
|
case int8:
|
|
|
|
return encoderCache["int8"](t)
|
|
|
|
case uint8:
|
|
|
|
return encoderCache["uint8"](t)
|
|
|
|
case int16:
|
|
|
|
return encoderCache["int16"](t)
|
|
|
|
case uint16:
|
|
|
|
return encoderCache["uint16"](t)
|
|
|
|
case int32:
|
|
|
|
return encoderCache["int32"](t)
|
|
|
|
case uint32:
|
|
|
|
return encoderCache["uint32"](t)
|
|
|
|
case int64:
|
|
|
|
return encoderCache["int64"](t)
|
|
|
|
case uint64:
|
|
|
|
return encoderCache["uint64"](t)
|
|
|
|
case float32:
|
|
|
|
return encoderCache["float32"](t)
|
|
|
|
case float64:
|
|
|
|
return encoderCache["float64"](t)
|
|
|
|
case string:
|
|
|
|
return encoderCache["string"](t)
|
|
|
|
default:
|
|
|
|
return nil, errors.New("ssob: No base type")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-10-04 12:28:45 +02:00
|
|
|
func marshal(e interface{}) (ret []byte, err error) {
|
2019-10-05 01:42:09 +02:00
|
|
|
ret, err = marshalBaseType(e)
|
|
|
|
if err == nil {
|
|
|
|
return ret, err
|
|
|
|
}
|
|
|
|
|
2019-10-04 12:28:45 +02:00
|
|
|
var key string
|
|
|
|
t := reflect.TypeOf(e)
|
|
|
|
v := reflect.ValueOf(e)
|
2019-10-22 13:44:08 +02:00
|
|
|
switch t.Kind() {
|
|
|
|
case reflect.Ptr:
|
2019-10-04 12:28:45 +02:00
|
|
|
if v.IsNil() {
|
|
|
|
return nil, errors.New("ssob: Cannot marshal nil pointer")
|
|
|
|
}
|
|
|
|
p := reflect.Indirect(v)
|
|
|
|
return marshal(p.Interface())
|
2019-10-22 13:44:08 +02:00
|
|
|
case reflect.Bool, reflect.Int8, reflect.Int16, reflect.Int32,
|
|
|
|
reflect.Int64, reflect.Uint8, reflect.Uint16, reflect.Uint32,
|
|
|
|
reflect.Uint64, reflect.String, reflect.Struct:
|
|
|
|
key = t.Name()
|
|
|
|
default:
|
2019-10-04 12:28:45 +02:00
|
|
|
key = string(t.Kind())
|
|
|
|
}
|
|
|
|
|
|
|
|
if f, ok := encoderCache[key]; ok {
|
|
|
|
return f(e)
|
|
|
|
} else {
|
|
|
|
err = encRegister(e)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return marshal(e)
|
|
|
|
}
|
2019-10-04 17:58:17 +02:00
|
|
|
|
|
|
|
func RegisterEncoder(name string, f MarshalFunc) {
|
|
|
|
encoderCache[name] = f
|
|
|
|
}
|