180 lines
3.4 KiB
Go
180 lines
3.4 KiB
Go
package vm
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"math/big"
|
|
"reflect"
|
|
)
|
|
|
|
// A StackItem represents the "real" value that is pushed on the stack.
|
|
type StackItem interface {
|
|
fmt.Stringer
|
|
Value() interface{}
|
|
}
|
|
|
|
func makeStackItem(v interface{}) StackItem {
|
|
switch val := v.(type) {
|
|
case int:
|
|
return &BigIntegerItem{
|
|
value: big.NewInt(int64(val)),
|
|
}
|
|
case []byte:
|
|
return &ByteArrayItem{
|
|
value: val,
|
|
}
|
|
case bool:
|
|
return &BoolItem{
|
|
value: val,
|
|
}
|
|
case []StackItem:
|
|
return &ArrayItem{
|
|
value: val,
|
|
}
|
|
case *big.Int:
|
|
return &BigIntegerItem{
|
|
value: val,
|
|
}
|
|
case StackItem:
|
|
return val
|
|
case []int:
|
|
a := []StackItem{}
|
|
for _, i := range val {
|
|
a = append(a, makeStackItem(i))
|
|
}
|
|
return makeStackItem(a)
|
|
default:
|
|
panic(
|
|
fmt.Sprintf(
|
|
"invalid stack item type: %v (%v)",
|
|
val,
|
|
reflect.TypeOf(val),
|
|
),
|
|
)
|
|
}
|
|
}
|
|
|
|
// StructItem represents a struct on the stack.
|
|
type StructItem struct {
|
|
value []StackItem
|
|
}
|
|
|
|
// NewStructItem returns an new StructItem object.
|
|
func NewStructItem(items []StackItem) *StructItem {
|
|
return &StructItem{
|
|
value: items,
|
|
}
|
|
}
|
|
|
|
// Value implements StackItem interface.
|
|
func (i *StructItem) Value() interface{} {
|
|
return i.value
|
|
}
|
|
|
|
func (i *StructItem) String() string {
|
|
return "Struct"
|
|
}
|
|
|
|
// BigIntegerItem represents a big integer on the stack.
|
|
type BigIntegerItem struct {
|
|
value *big.Int
|
|
}
|
|
|
|
// NewBigIntegerItem returns an new BigIntegerItem object.
|
|
func NewBigIntegerItem(value int) *BigIntegerItem {
|
|
return &BigIntegerItem{
|
|
value: big.NewInt(int64(value)),
|
|
}
|
|
}
|
|
|
|
// Value implements StackItem interface.
|
|
func (i *BigIntegerItem) Value() interface{} {
|
|
return i.value
|
|
}
|
|
|
|
func (i *BigIntegerItem) String() string {
|
|
return "BigInteger"
|
|
}
|
|
|
|
// MarshalJSON implements the json.Marshaler interface.
|
|
func (i *BigIntegerItem) MarshalJSON() ([]byte, error) {
|
|
return json.Marshal(i.value)
|
|
}
|
|
|
|
// BoolItem represents a boolean StackItem.
|
|
type BoolItem struct {
|
|
value bool
|
|
}
|
|
|
|
// NewBoolItem returns an new BoolItem object.
|
|
func NewBoolItem(val bool) *BoolItem {
|
|
return &BoolItem{
|
|
value: val,
|
|
}
|
|
}
|
|
|
|
// Value implements StackItem interface.
|
|
func (i *BoolItem) Value() interface{} {
|
|
return i.value
|
|
}
|
|
|
|
// MarshalJSON implements the json.Marshaler interface.
|
|
func (i *BoolItem) MarshalJSON() ([]byte, error) {
|
|
return json.Marshal(i.value)
|
|
}
|
|
|
|
func (i *BoolItem) String() string {
|
|
return "Bool"
|
|
}
|
|
|
|
// ByteArrayItem represents a byte array on the stack.
|
|
type ByteArrayItem struct {
|
|
value []byte
|
|
}
|
|
|
|
// NewByteArrayItem returns an new ByteArrayItem object.
|
|
func NewByteArrayItem(b []byte) *ByteArrayItem {
|
|
return &ByteArrayItem{
|
|
value: b,
|
|
}
|
|
}
|
|
|
|
// Value implements StackItem interface.
|
|
func (i *ByteArrayItem) Value() interface{} {
|
|
return i.value
|
|
}
|
|
|
|
// MarshalJSON implements the json.Marshaler interface.
|
|
func (i *ByteArrayItem) MarshalJSON() ([]byte, error) {
|
|
return json.Marshal(string(i.value))
|
|
}
|
|
|
|
func (i *ByteArrayItem) String() string {
|
|
return "ByteArray"
|
|
}
|
|
|
|
// ArrayItem represents a new ArrayItem object.
|
|
type ArrayItem struct {
|
|
value []StackItem
|
|
}
|
|
|
|
// NewArrayItem returns a new ArrayItem object.
|
|
func NewArrayItem(items []StackItem) *ArrayItem {
|
|
return &ArrayItem{
|
|
value: items,
|
|
}
|
|
}
|
|
|
|
// Value implements StackItem interface.
|
|
func (i *ArrayItem) Value() interface{} {
|
|
return i.value
|
|
}
|
|
|
|
// MarshalJSON implements the json.Marshaler interface.
|
|
func (i *ArrayItem) MarshalJSON() ([]byte, error) {
|
|
return json.Marshal(i.value)
|
|
}
|
|
|
|
func (i *ArrayItem) String() string {
|
|
return "Array"
|
|
}
|