Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / Core / IncrementalReadDecoders.cs / 1 / IncrementalReadDecoders.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System.Diagnostics; namespace System.Xml { // // IncrementalReadDecoder abstract class // internal abstract class IncrementalReadDecoder { internal abstract int DecodedCount { get; } internal abstract bool IsFull { get; } internal abstract void SetNextOutputBuffer( Array array, int offset, int len ); internal abstract int Decode( char[] chars, int startPos, int len ); internal abstract int Decode( string str, int startPos, int len ); internal abstract void Reset(); } // // Dummy IncrementalReadDecoder // internal class IncrementalReadDummyDecoder : IncrementalReadDecoder { internal override int DecodedCount { get { return -1; } } internal override bool IsFull { get { return false; } } internal override void SetNextOutputBuffer( Array array, int offset, int len ) {} internal override int Decode( char[] chars, int startPos, int len ) { return len; } internal override int Decode( string str, int startPos, int len ) { return len; } internal override void Reset() {} } // // IncrementalReadDecoder for ReadChars // internal class IncrementalReadCharsDecoder : IncrementalReadDecoder { char[] buffer; int startIndex; int curIndex; int endIndex; internal IncrementalReadCharsDecoder() { } internal override int DecodedCount { get { return curIndex - startIndex; } } internal override bool IsFull { get { return curIndex == endIndex; } } internal override int Decode( char[] chars, int startPos, int len ) { Debug.Assert( chars != null ); Debug.Assert( len >= 0 ); Debug.Assert( startPos >= 0 ); Debug.Assert( chars.Length - startPos >= len ); Debug.Assert( len > 0 ); int copyCount = endIndex - curIndex; if ( copyCount > len ) { copyCount = len; } Buffer.BlockCopy( chars, startPos * 2, buffer, curIndex * 2, copyCount * 2 ); curIndex += copyCount; return copyCount; } internal override int Decode( string str, int startPos, int len ) { Debug.Assert( str != null ); Debug.Assert( len >= 0 ); Debug.Assert( startPos >= 0 ); Debug.Assert( str.Length - startPos >= len ); Debug.Assert( len > 0 ); int copyCount = endIndex - curIndex; if ( copyCount > len ) { copyCount = len; } str.CopyTo( startPos, buffer, curIndex, copyCount ); curIndex += copyCount; return copyCount; } internal override void Reset() { } internal override void SetNextOutputBuffer( Array buffer, int index, int count ) { Debug.Assert( buffer != null ); Debug.Assert( count >= 0 ); Debug.Assert( index >= 0 ); Debug.Assert( buffer.Length - index >= count ); Debug.Assert( ( buffer as char[] ) != null ); this.buffer = (char[])buffer; this.startIndex = index; this.curIndex = index; this.endIndex = index + count; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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