github.com/ontio/ontology@v1.14.4/vm/evm/stack_table.go (about)

     1  // Copyright (C) 2021 The Ontology Authors
     2  // Copyright 2017 The go-ethereum Authors
     3  // This file is part of the go-ethereum library.
     4  //
     5  // The go-ethereum library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Lesser General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // The go-ethereum library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  // GNU Lesser General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Lesser General Public License
    16  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package evm
    19  
    20  import (
    21  	"github.com/ontio/ontology/vm/evm/params"
    22  )
    23  
    24  func minSwapStack(n int) int {
    25  	return minStack(n, n)
    26  }
    27  func maxSwapStack(n int) int {
    28  	return maxStack(n, n)
    29  }
    30  
    31  func minDupStack(n int) int {
    32  	return minStack(n, n+1)
    33  }
    34  func maxDupStack(n int) int {
    35  	return maxStack(n, n+1)
    36  }
    37  
    38  func maxStack(pop, push int) int {
    39  	return int(params.StackLimit) + pop - push
    40  }
    41  func minStack(pops, push int) int {
    42  	return pops
    43  }