Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / Xml / System / Xml / Core / CharEntityEncoderFallback.cs / 1 / CharEntityEncoderFallback.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System.Text; using System.Diagnostics; using System.Globalization; namespace System.Xml { // // CharEntityEncoderFallback // internal class CharEntityEncoderFallback : EncoderFallback { private CharEntityEncoderFallbackBuffer fallbackBuffer; private int[] textContentMarks; private int endMarkPos; private int curMarkPos; private int startOffset; internal CharEntityEncoderFallback() { } public override EncoderFallbackBuffer CreateFallbackBuffer() { if ( fallbackBuffer == null ) { fallbackBuffer = new CharEntityEncoderFallbackBuffer( this ); } return fallbackBuffer; } public override int MaxCharCount { get { return 12; } } internal int StartOffset { get { return startOffset; } set { startOffset = value; } } internal void Reset( int[] textContentMarks, int endMarkPos ) { this.textContentMarks = textContentMarks; this.endMarkPos = endMarkPos; curMarkPos = 0; } internal bool CanReplaceAt( int index ) { int mPos = curMarkPos; int charPos = startOffset + index; while ( mPos < endMarkPos && charPos >= textContentMarks[mPos+1] ) { mPos++; } curMarkPos = mPos; return (mPos & 1) != 0; } } // // CharEntityFallbackBuffer // internal class CharEntityEncoderFallbackBuffer : EncoderFallbackBuffer { private CharEntityEncoderFallback parent; private string charEntity = string.Empty; private int charEntityIndex = -1; internal CharEntityEncoderFallbackBuffer( CharEntityEncoderFallback parent ) { this.parent = parent; } public override bool Fallback( char charUnknown, int index ) { // If we are already in fallback, throw, it's probably at the suspect character in charEntity if ( charEntityIndex >= 0 ) { (new EncoderExceptionFallbackBuffer()).Fallback( charUnknown, index ); } // find out if we can replace the character with entity if ( parent.CanReplaceAt( index ) ) { // Create the replacement character entity charEntity = string.Format( CultureInfo.InvariantCulture, "{0:X};", new object[] { (int)charUnknown } ); charEntityIndex = 0; return true; } else { EncoderFallbackBuffer errorFallbackBuffer = ( new EncoderExceptionFallback() ).CreateFallbackBuffer(); errorFallbackBuffer.Fallback( charUnknown, index ); return false; } } public override bool Fallback( char charUnknownHigh, char charUnknownLow, int index ) { // check input surrogate pair if ( !char.IsSurrogatePair( charUnknownHigh, charUnknownLow ) ) { throw XmlConvert.CreateInvalidSurrogatePairException( charUnknownHigh, charUnknownLow ); } // If we are already in fallback, throw, it's probably at the suspect character in charEntity if ( charEntityIndex >= 0 ) { (new EncoderExceptionFallbackBuffer()).Fallback( charUnknownHigh, charUnknownLow, index ); } if ( parent.CanReplaceAt( index ) ) { // Create the replacement character entity charEntity = string.Format( CultureInfo.InvariantCulture, "{0:X};", new object[] { char.ConvertToUtf32( charUnknownHigh, charUnknownLow ) } ); charEntityIndex = 0; return true; } else { EncoderFallbackBuffer errorFallbackBuffer = ( new EncoderExceptionFallback() ).CreateFallbackBuffer(); errorFallbackBuffer.Fallback( charUnknownHigh, charUnknownLow, index ); return false; } } public override char GetNextChar() { if ( charEntityIndex == -1 ) { return (char)0; } else { Debug.Assert( charEntityIndex < charEntity.Length ); char ch = charEntity[charEntityIndex++]; if ( charEntityIndex == charEntity.Length ) { charEntityIndex = -1; } return ch; } } public override bool MovePrevious() { if ( charEntityIndex == -1 ) { return false; } else { Debug.Assert( charEntityIndex < charEntity.Length ); if ( charEntityIndex > 0 ) { charEntityIndex--; return true; } else { return false; } } } public override int Remaining { get { if ( charEntityIndex == -1 ) { return 0; } else { return charEntity.Length - charEntityIndex; } } } public override void Reset() { charEntityIndex = -1; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System.Text; using System.Diagnostics; using System.Globalization; namespace System.Xml { // // CharEntityEncoderFallback // internal class CharEntityEncoderFallback : EncoderFallback { private CharEntityEncoderFallbackBuffer fallbackBuffer; private int[] textContentMarks; private int endMarkPos; private int curMarkPos; private int startOffset; internal CharEntityEncoderFallback() { } public override EncoderFallbackBuffer CreateFallbackBuffer() { if ( fallbackBuffer == null ) { fallbackBuffer = new CharEntityEncoderFallbackBuffer( this ); } return fallbackBuffer; } public override int MaxCharCount { get { return 12; } } internal int StartOffset { get { return startOffset; } set { startOffset = value; } } internal void Reset( int[] textContentMarks, int endMarkPos ) { this.textContentMarks = textContentMarks; this.endMarkPos = endMarkPos; curMarkPos = 0; } internal bool CanReplaceAt( int index ) { int mPos = curMarkPos; int charPos = startOffset + index; while ( mPos < endMarkPos && charPos >= textContentMarks[mPos+1] ) { mPos++; } curMarkPos = mPos; return (mPos & 1) != 0; } } // // CharEntityFallbackBuffer // internal class CharEntityEncoderFallbackBuffer : EncoderFallbackBuffer { private CharEntityEncoderFallback parent; private string charEntity = string.Empty; private int charEntityIndex = -1; internal CharEntityEncoderFallbackBuffer( CharEntityEncoderFallback parent ) { this.parent = parent; } public override bool Fallback( char charUnknown, int index ) { // If we are already in fallback, throw, it's probably at the suspect character in charEntity if ( charEntityIndex >= 0 ) { (new EncoderExceptionFallbackBuffer()).Fallback( charUnknown, index ); } // find out if we can replace the character with entity if ( parent.CanReplaceAt( index ) ) { // Create the replacement character entity charEntity = string.Format( CultureInfo.InvariantCulture, "{0:X};", new object[] { (int)charUnknown } ); charEntityIndex = 0; return true; } else { EncoderFallbackBuffer errorFallbackBuffer = ( new EncoderExceptionFallback() ).CreateFallbackBuffer(); errorFallbackBuffer.Fallback( charUnknown, index ); return false; } } public override bool Fallback( char charUnknownHigh, char charUnknownLow, int index ) { // check input surrogate pair if ( !char.IsSurrogatePair( charUnknownHigh, charUnknownLow ) ) { throw XmlConvert.CreateInvalidSurrogatePairException( charUnknownHigh, charUnknownLow ); } // If we are already in fallback, throw, it's probably at the suspect character in charEntity if ( charEntityIndex >= 0 ) { (new EncoderExceptionFallbackBuffer()).Fallback( charUnknownHigh, charUnknownLow, index ); } if ( parent.CanReplaceAt( index ) ) { // Create the replacement character entity charEntity = string.Format( CultureInfo.InvariantCulture, "{0:X};", new object[] { char.ConvertToUtf32( charUnknownHigh, charUnknownLow ) } ); charEntityIndex = 0; return true; } else { EncoderFallbackBuffer errorFallbackBuffer = ( new EncoderExceptionFallback() ).CreateFallbackBuffer(); errorFallbackBuffer.Fallback( charUnknownHigh, charUnknownLow, index ); return false; } } public override char GetNextChar() { if ( charEntityIndex == -1 ) { return (char)0; } else { Debug.Assert( charEntityIndex < charEntity.Length ); char ch = charEntity[charEntityIndex++]; if ( charEntityIndex == charEntity.Length ) { charEntityIndex = -1; } return ch; } } public override bool MovePrevious() { if ( charEntityIndex == -1 ) { return false; } else { Debug.Assert( charEntityIndex < charEntity.Length ); if ( charEntityIndex > 0 ) { charEntityIndex--; return true; } else { return false; } } } public override int Remaining { get { if ( charEntityIndex == -1 ) { return 0; } else { return charEntity.Length - charEntityIndex; } } } public override void Reset() { charEntityIndex = -1; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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