BinHexEncoder.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Xml / System / Xml / BinHexEncoder.cs / 1305376 / BinHexEncoder.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace System.Xml { 
    internal static class BinHexEncoder {
 
        private const string s_hexDigits = "0123456789ABCDEF";
        private const int CharsChunkSize = 128;

        internal static void Encode( byte[] buffer, int index, int count, XmlWriter writer ) { 
            if ( buffer == null ) {
                throw new ArgumentNullException( "buffer" ); 
            } 
            if ( index < 0 ) {
                throw new ArgumentOutOfRangeException( "index" ); 
            }
            if ( count < 0 ) {
                throw new ArgumentOutOfRangeException( "count" );
            } 
            if ( count > buffer.Length - index ) {
                throw new ArgumentOutOfRangeException( "count" ); 
            } 

            char[] chars = new char[ ( count * 2 ) < CharsChunkSize ? ( count * 2 ) : CharsChunkSize ]; 
            int endIndex = index + count;
            while ( index < endIndex ) {
                int cnt = ( count < CharsChunkSize/2 ) ? count : CharsChunkSize/2;
                int charCount = Encode( buffer, index, cnt, chars ); 
                writer.WriteRaw( chars, 0, charCount );
                index += cnt; 
                count -= cnt; 
            }
        } 

        internal static string Encode(byte[] inArray, int offsetIn, int count) {
            if (null == inArray) {
                throw new ArgumentNullException("inArray"); 
            }
            if (0 > offsetIn) { 
                throw new ArgumentOutOfRangeException("offsetIn"); 
            }
            if (0 > count) { 
                throw new ArgumentOutOfRangeException("count");
            }
            if (count > inArray.Length - offsetIn) {
                throw new ArgumentOutOfRangeException("count"); 
            }
 
            char[] outArray = new char[2 * count]; 
            int lenOut =  Encode(inArray, offsetIn, count, outArray);
            return new String(outArray, 0, lenOut); 
        }

        private static int Encode(byte[] inArray, int offsetIn, int count, char[] outArray) {
            int curOffsetOut =0, offsetOut = 0; 
            byte b;
            int lengthOut = outArray.Length; 
 
            for (int j=0; j> 4];
                if (curOffsetOut == lengthOut) {
                    break;
                } 
                outArray[curOffsetOut ++] = s_hexDigits[b & 0xF];
                if (curOffsetOut == lengthOut) { 
                    break; 
                }
            } 
            return curOffsetOut - offsetOut;
        } // function

    } // class 
} // namespace

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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