mirror of https://github.com/poanetwork/quorum.git
45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
// Copyright 2017 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library 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 go-ethereum library 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package vm
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/ethereum/go-ethereum/params"
|
|
)
|
|
|
|
func makeStackFunc(pop, push int) stackValidationFunc {
|
|
return func(stack *Stack) error {
|
|
if err := stack.require(pop); err != nil {
|
|
return err
|
|
}
|
|
|
|
if stack.len()+push-pop > int(params.StackLimit) {
|
|
return fmt.Errorf("stack limit reached %d (%d)", stack.len(), params.StackLimit)
|
|
}
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func makeDupStackFunc(n int) stackValidationFunc {
|
|
return makeStackFunc(n, n+1)
|
|
}
|
|
|
|
func makeSwapStackFunc(n int) stackValidationFunc {
|
|
return makeStackFunc(n, n)
|
|
}
|