101 lines
2.2 KiB
C#
101 lines
2.2 KiB
C#
/*
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Copyright (C) 2011-2015 de4dot@gmail.com
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This file is part of de4dot.
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de4dot is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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de4dot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with de4dot. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Text;
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using System.Collections.Generic;
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namespace de4dot.blocks.cflow {
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class ValueStack {
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List<Value> stack = new List<Value>();
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public int Size {
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get { return stack.Count; }
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}
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public void Initialize() {
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stack.Clear();
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}
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public void Clear() {
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stack.Clear();
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}
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public void Push(Value value) {
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stack.Add(value);
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}
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public Value Peek() {
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if (stack.Count == 0)
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return new UnknownValue();
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return stack[stack.Count - 1];
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}
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public Value Pop() {
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Value value = Peek();
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if (stack.Count != 0)
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stack.RemoveAt(stack.Count - 1);
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return value;
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}
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public void Push(int count) {
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if (count < 0)
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throw new ArgumentOutOfRangeException("count");
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for (int i = 0; i < count; i++)
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PushUnknown();
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}
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public void PushUnknown() {
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Push(new UnknownValue());
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}
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public void Pop(int count) {
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if (count < 0)
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throw new ArgumentOutOfRangeException("count");
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if (count >= stack.Count)
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stack.Clear();
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else if (count > 0)
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stack.RemoveRange(stack.Count - count, count);
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}
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public void CopyTop() {
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Push(Peek());
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}
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public override string ToString() {
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if (stack.Count == 0)
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return "<empty>";
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var sb = new StringBuilder();
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const int maxValues = 5;
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for (int i = 0; i < maxValues; i++) {
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int index = stack.Count - i - 1;
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if (index < 0)
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break;
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if (i > 0)
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sb.Append(", ");
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sb.Append(stack[index].ToString());
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}
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if (maxValues < stack.Count)
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sb.Append(", ...");
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return sb.ToString();
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}
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}
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}
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