ByteStack.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / ByteStack.cs / 1 / ByteStack.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
using System; 

namespace System.Xml { 

// This stack is designed to minimize object creation for the
// objects being stored in the stack by allowing them to be
// re-used over time.  It basically pushes the objects creating 
// a high water mark then as Pop() is called they are not removed
// so that next time Push() is called it simply returns the last 
// object that was already on the stack. 

    internal class ByteStack { 
        private byte[] stack;
        private int growthRate;
        private int top;
        private int size; 

        public ByteStack(int growthRate) { 
            this.growthRate = growthRate; 
            top = 0;
            stack = new byte[growthRate]; 
            size = growthRate;
        }

        public void Push(byte data) { 
            if (size == top) {
                byte[] newstack = new byte[size + growthRate]; 
                if (top > 0) { 
                    Buffer.BlockCopy(stack, 0, newstack, 0, top);
                } 
                stack = newstack;
                size += growthRate;
            }
            stack[top++] = data; 
        }
 
        public byte Pop() { 
            if (top > 0) {
                return stack[--top]; 
            } else {
                return 0;
            }
        } 

        public byte Peek() { 
            if (top > 0) { 
                return stack[top - 1];
            } else { 
                return 0;
            }
        }
 
        public int Length {
            get { 
                return top; 
            }
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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