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struct.go
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struct.go
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/*
* Copyright (C) 2018 The ontology Authors
* This file is part of The ontology library.
*
* The ontology is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The ontology is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with The ontology. If not, see <http://www.gnu.org/licenses/>.
*/
package types
import (
"fmt"
"math/big"
"reflect"
"OntologyWithPOC/vm/neovm/interfaces"
)
const (
MAX_STRUCT_DEPTH = 10
MAX_CLONE_LENGTH = 1024
)
type Struct struct {
_array []StackItems
}
func NewStruct(value []StackItems) *Struct {
var this Struct
this._array = value
return &this
}
func (this *Struct) Equals(other StackItems) bool {
if this == other {
return true
}
oa, err := other.GetStruct()
if err != nil {
return false
}
return reflect.DeepEqual(this._array, oa)
}
func (this *Struct) GetBigInteger() (*big.Int, error) {
return nil, fmt.Errorf("%s", "Not support struct to integer")
}
func (this *Struct) GetBoolean() (bool, error) {
return true, nil
}
func (this *Struct) GetByteArray() ([]byte, error) {
return nil, fmt.Errorf("%s", "Not support struct to byte array")
}
func (this *Struct) GetInterface() (interfaces.Interop, error) {
return nil, fmt.Errorf("%s", "Not support struct to interface")
}
func (s *Struct) GetArray() ([]StackItems, error) {
return s._array, nil
}
func (s *Struct) GetStruct() ([]StackItems, error) {
return s._array, nil
}
func (s *Struct) Clone() (StackItems, error) {
var i int
return clone(s, &i)
}
func clone(s *Struct, length *int) (StackItems, error) {
if *length > MAX_CLONE_LENGTH {
return nil, fmt.Errorf("%s", "over max struct clone length")
}
var arr []StackItems
for _, v := range s._array {
*length++
if value, ok := v.(*Struct); ok {
vc, err := clone(value, length)
if err != nil {
return nil, err
}
arr = append(arr, vc)
} else {
arr = append(arr, v)
}
}
return &Struct{arr}, nil
}
func checkStructRef(item StackItems, visited map[uintptr]bool, depth int) bool {
if depth > MAX_STRUCT_DEPTH {
return true
}
switch item.(type) {
case *Struct:
p := reflect.ValueOf(item).Pointer()
if visited[p] {
return true
}
visited[p] = true
st, _ := item.GetStruct()
for _, v := range st {
if checkStructRef(v, visited, depth+1) {
return true
}
}
delete(visited, p)
return false
default:
return false
}
}
func (this *Struct) GetMap() (map[StackItems]StackItems, error) {
return nil, fmt.Errorf("%s", "Not support struct to map")
}
func (this *Struct) Add(item StackItems) {
this._array = append(this._array, item)
}
func (this *Struct) RemoveAt(index int) {
this._array = append(this._array[:index-1], this._array[index:]...)
}
func (this *Struct) Count() int {
return len(this._array)
}
func (this *Struct) IsMapKey() bool {
return false
}