67 lines
1.9 KiB
C#
67 lines
1.9 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="ByteStack.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// <owner current="true" primary="true">[....]</owner>
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//------------------------------------------------------------------------------
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using System;
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namespace System.Xml {
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// This stack is designed to minimize object creation for the
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// objects being stored in the stack by allowing them to be
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// re-used over time. It basically pushes the objects creating
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// a high water mark then as Pop() is called they are not removed
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// so that next time Push() is called it simply returns the last
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// object that was already on the stack.
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internal class ByteStack {
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private byte[] stack;
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private int growthRate;
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private int top;
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private int size;
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public ByteStack(int growthRate) {
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this.growthRate = growthRate;
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top = 0;
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stack = new byte[growthRate];
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size = growthRate;
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}
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public void Push(byte data) {
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if (size == top) {
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byte[] newstack = new byte[size + growthRate];
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if (top > 0) {
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Buffer.BlockCopy(stack, 0, newstack, 0, top);
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}
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stack = newstack;
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size += growthRate;
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}
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stack[top++] = data;
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}
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public byte Pop() {
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if (top > 0) {
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return stack[--top];
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} else {
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return 0;
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}
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}
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public byte Peek() {
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if (top > 0) {
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return stack[top - 1];
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} else {
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return 0;
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}
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}
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public int Length {
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get {
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return top;
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}
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}
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}
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}
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