forked from TrueCloudLab/neoneo-go
c1b6738bdb
* VM:Add abstract stack item * VM: Add stackItems; Array, Boolean, Int and ByteArray * VM: Add tests for stack item * VM: first pass at Random Access Stack object * VM: Add Sub, Mul, Mod LSH, RSH * VM: moved test helper functions into separate file * VM: removed helper functions from stack_test.go * Add conversions for bytearray and Int stack items * Add instructions file for vm * - Add guide to stack readme - Add testReadInt64 * Add Builder * Refactor Int, Boolean, ByteArray conversion * Add Context stack Item * Add Invocation stack - convenience RAS * rename testhelper to test_helper * Move opcode file * - Add `Add` OpCode - Add Opcode Function map * - Add test for math `Add` opcode - basic opcode execution * Add popTwoIntegers convenience func * Add `SUB` Opcode * Export Context Read methods - Return errors where failable * - Add `Op` to handleOP func signature - Add PushNBytes OPcode * remove error on NewBoolean - Expose underlying with Getter on Boolean StackItem - Add Equals method for ByteArray * Make Next() method on Context failable, refactor peekContext and Peek * Add ExecuteOp, Step and Run methods on the VM * Add Equal Opcode * Add THROWIFNOT Opcode * Add RET Opcode * Refactor PushNBytes Opcode * refactor Add, Sub to return VMSTATE add popTwoByteArrays helper function * Add basic tests for vm * clarify vm states * Add astack * [VM] Pass ResultStack to the opcode handlers * [VM] refactor handlers to have rstack as argument * [Stack] - Change RemoveCurrentContext for PopCurrentContext - Add CopTo method to stack * [VM] Add Result stack Len check in simple run test * [VM] fix typo * [Peer/Stall] Change seconds to milliseconds in test
94 lines
2.1 KiB
Go
94 lines
2.1 KiB
Go
package stack
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import "math/big"
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// Int represents an integer on the stack
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type Int struct {
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*abstractItem
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val *big.Int
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}
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// NewInt will convert a big integer into
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// a StackInteger
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func NewInt(val *big.Int) (*Int, error) {
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return &Int{
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abstractItem: &abstractItem{},
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val: val,
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}, nil
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}
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// Equal will check if two integers hold equal value
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func (i *Int) Equal(s *Int) bool {
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if i.val.Cmp(s.val) != 0 {
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return false
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}
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return true
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}
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// Add will add two stackIntegers together
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func (i *Int) Add(s *Int) (*Int, error) {
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return &Int{
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val: new(big.Int).Add(i.val, s.val),
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}, nil
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}
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// Sub will subtract two stackIntegers together
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func (i *Int) Sub(s *Int) (*Int, error) {
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return &Int{
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val: new(big.Int).Sub(i.val, s.val),
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}, nil
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}
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// Mul will multiply two stackIntegers together
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func (i *Int) Mul(s *Int) (*Int, error) {
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return &Int{
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val: new(big.Int).Mul(i.val, s.val),
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}, nil
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}
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// Mod will take the mod of two stackIntegers together
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func (i *Int) Mod(s *Int) (*Int, error) {
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return &Int{
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val: new(big.Int).Mod(i.val, s.val),
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}, nil
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}
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// Rsh will shift the integer b to the right by `n` bits
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func (i *Int) Rsh(n *Int) (*Int, error) {
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return &Int{
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val: new(big.Int).Rsh(i.val, uint(n.val.Int64())),
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}, nil
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}
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// Lsh will shift the integer b to the left by `n` bits
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func (i *Int) Lsh(n *Int) (*Int, error) {
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return &Int{
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val: new(big.Int).Lsh(i.val, uint(n.val.Int64())),
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}, nil
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}
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// Integer will overwrite the default implementation
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// to allow go to cast this item as an integer.
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func (i *Int) Integer() (*Int, error) {
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return i, nil
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}
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// ByteArray override the default ByteArray method
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// to convert a Integer into a byte Array
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func (i *Int) ByteArray() (*ByteArray, error) {
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b := i.val.Bytes()
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dest := reverse(b)
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return NewByteArray(dest), nil
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}
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//Boolean override the default Boolean method
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// to convert an Integer into a Boolean StackItem
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func (i *Int) Boolean() (*Boolean, error) {
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boolean := (i.val.Int64() != 0)
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return NewBoolean(boolean), nil
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}
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//Value returns the underlying big.Int
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func (i *Int) Value() *big.Int {
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return i.val
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}
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