Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / Text / EncoderNLS.cs / 1 / EncoderNLS.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System.Text { using System.Runtime.Serialization; using System.Security.Permissions; using System.Text; using System; // An Encoder is used to encode a sequence of blocks of characters into // a sequence of blocks of bytes. Following instantiation of an encoder, // sequential blocks of characters are converted into blocks of bytes through // calls to the GetBytes method. The encoder maintains state between the // conversions, allowing it to correctly encode character sequences that span // adjacent blocks. // // Instances of specific implementations of the Encoder abstract base // class are typically obtained through calls to the GetEncoder method // of Encoding objects. // [Serializable] internal class EncoderNLS : Encoder, ISerializable { // Need a place for the last left over character, most of our encodings use this internal char charLeftOver; protected Encoding m_encoding; [NonSerialized] protected bool m_mustFlush; [NonSerialized] internal bool m_throwOnOverflow; [NonSerialized] internal int m_charsUsed; #region Serialization // Constructor called by serialization. called during deserialization. internal EncoderNLS(SerializationInfo info, StreamingContext context) { throw new NotSupportedException( String.Format( System.Globalization.CultureInfo.CurrentCulture, Environment.GetResourceString("NotSupported_TypeCannotDeserialized"), this.GetType())); } // ISerializable implementation. called during serialization. [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)] void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) { SerializeEncoder(info); info.AddValue("encoding", this.m_encoding); info.AddValue("charLeftOver", this.charLeftOver); info.SetType(typeof(Encoding.DefaultEncoder)); } #endregion Serialization internal EncoderNLS(Encoding encoding) { this.m_encoding = encoding; this.m_fallback = this.m_encoding.EncoderFallback; this.Reset(); } // This one is used when deserializing (like UTF7Encoding.Encoder) internal EncoderNLS() { this.m_encoding = null; this.Reset(); } public override void Reset() { this.charLeftOver = (char)0; if (m_fallbackBuffer != null) m_fallbackBuffer.Reset(); } public override unsafe int GetByteCount(char[] chars, int index, int count, bool flush) { // Validate input parameters if (chars == null) throw new ArgumentNullException( "chars", Environment.GetResourceString("ArgumentNull_Array")); if (index < 0 || count < 0) throw new ArgumentOutOfRangeException((index<0 ? "index" : "count"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (chars.Length - index < count) throw new ArgumentOutOfRangeException("chars", Environment.GetResourceString("ArgumentOutOfRange_IndexCountBuffer")); // Avoid empty input problem if (chars.Length == 0) chars = new char[1]; // Just call the pointer version int result = -1; fixed (char* pChars = chars) { result = GetByteCount(pChars + index, count, flush); } return result; } public unsafe override int GetByteCount(char* chars, int count, bool flush) { // Validate input parameters if (chars == null) throw new ArgumentNullException( "chars", Environment.GetResourceString("ArgumentNull_Array")); if (count < 0) throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); this.m_mustFlush = flush; this.m_throwOnOverflow = true; return m_encoding.GetByteCount(chars, count, this); } public override unsafe int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex, bool flush) { // Validate parameters if (chars == null || bytes == null) throw new ArgumentNullException((chars == null ? "chars" : "bytes"), Environment.GetResourceString("ArgumentNull_Array")); if (charIndex < 0 || charCount < 0) throw new ArgumentOutOfRangeException((charIndex<0 ? "charIndex" : "charCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (chars.Length - charIndex < charCount) throw new ArgumentOutOfRangeException("chars", Environment.GetResourceString("ArgumentOutOfRange_IndexCountBuffer")); if (byteIndex < 0 || byteIndex > bytes.Length) throw new ArgumentOutOfRangeException("byteIndex", Environment.GetResourceString("ArgumentOutOfRange_Index")); if (chars.Length == 0) chars = new char[1]; int byteCount = bytes.Length - byteIndex; if (bytes.Length == 0) bytes = new byte[1]; // Just call pointer version fixed (char* pChars = chars) fixed (byte* pBytes = bytes) // Remember that charCount is # to decode, not size of array. return GetBytes(pChars + charIndex, charCount, pBytes + byteIndex, byteCount, flush); } public unsafe override int GetBytes(char* chars, int charCount, byte* bytes, int byteCount, bool flush) { // Validate parameters if (chars == null || bytes == null) throw new ArgumentNullException((chars == null ? "chars" : "bytes"), Environment.GetResourceString("ArgumentNull_Array")); if (byteCount < 0 || charCount < 0) throw new ArgumentOutOfRangeException((byteCount<0 ? "byteCount" : "charCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); this.m_mustFlush = flush; this.m_throwOnOverflow = true; return m_encoding.GetBytes(chars, charCount, bytes, byteCount, this); } // This method is used when your output buffer might not be large enough for the entire result. // Just call the pointer version. (This gets bytes) public override unsafe void Convert(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex, int byteCount, bool flush, out int charsUsed, out int bytesUsed, out bool completed) { // Validate parameters if (chars == null || bytes == null) throw new ArgumentNullException((chars == null ? "chars" : "bytes"), Environment.GetResourceString("ArgumentNull_Array")); if (charIndex < 0 || charCount < 0) throw new ArgumentOutOfRangeException((charIndex<0 ? "charIndex" : "charCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (byteIndex < 0 || byteCount < 0) throw new ArgumentOutOfRangeException((byteIndex<0 ? "byteIndex" : "byteCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (chars.Length - charIndex < charCount) throw new ArgumentOutOfRangeException("chars", Environment.GetResourceString("ArgumentOutOfRange_IndexCountBuffer")); if (bytes.Length - byteIndex < byteCount) throw new ArgumentOutOfRangeException("bytes", Environment.GetResourceString("ArgumentOutOfRange_IndexCountBuffer")); // Avoid empty input problem if (chars.Length == 0) chars = new char[1]; if (bytes.Length == 0) bytes = new byte[1]; // Just call the pointer version (can't do this for non-msft encoders) fixed (char* pChars = chars) { fixed (byte* pBytes = bytes) { Convert(pChars + charIndex, charCount, pBytes + byteIndex, byteCount, flush, out charsUsed, out bytesUsed, out completed); } } } // This is the version that uses pointers. We call the base encoding worker function // after setting our appropriate internal variables. This is getting bytes public override unsafe void Convert(char* chars, int charCount, byte* bytes, int byteCount, bool flush, out int charsUsed, out int bytesUsed, out bool completed) { // Validate input parameters if (bytes == null || chars == null) throw new ArgumentNullException(bytes == null ? "bytes" : "chars", Environment.GetResourceString("ArgumentNull_Array")); if (charCount < 0 || byteCount < 0) throw new ArgumentOutOfRangeException((charCount<0 ? "charCount" : "byteCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); // We don't want to throw this.m_mustFlush = flush; this.m_throwOnOverflow = false; this.m_charsUsed = 0; // Do conversion bytesUsed = this.m_encoding.GetBytes(chars, charCount, bytes, byteCount, this); charsUsed = this.m_charsUsed; // Its completed if they've used what they wanted AND if they didn't want flush or if we are flushed completed = (charsUsed == charCount) && (!flush || !this.HasState) && (m_fallbackBuffer == null || m_fallbackBuffer.Remaining == 0); // Our data thingys are now full, we can return } public Encoding Encoding { get { return m_encoding; } } public bool MustFlush { get { return m_mustFlush; } } // Anything left in our encoder? internal virtual bool HasState { get { return (this.charLeftOver != (char)0); } } // Allow encoding to clear our must flush instead of throwing (in ThrowBytesOverflow) internal void ClearMustFlush() { m_mustFlush = false; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System.Text { using System.Runtime.Serialization; using System.Security.Permissions; using System.Text; using System; // An Encoder is used to encode a sequence of blocks of characters into // a sequence of blocks of bytes. Following instantiation of an encoder, // sequential blocks of characters are converted into blocks of bytes through // calls to the GetBytes method. The encoder maintains state between the // conversions, allowing it to correctly encode character sequences that span // adjacent blocks. // // Instances of specific implementations of the Encoder abstract base // class are typically obtained through calls to the GetEncoder method // of Encoding objects. // [Serializable] internal class EncoderNLS : Encoder, ISerializable { // Need a place for the last left over character, most of our encodings use this internal char charLeftOver; protected Encoding m_encoding; [NonSerialized] protected bool m_mustFlush; [NonSerialized] internal bool m_throwOnOverflow; [NonSerialized] internal int m_charsUsed; #region Serialization // Constructor called by serialization. called during deserialization. internal EncoderNLS(SerializationInfo info, StreamingContext context) { throw new NotSupportedException( String.Format( System.Globalization.CultureInfo.CurrentCulture, Environment.GetResourceString("NotSupported_TypeCannotDeserialized"), this.GetType())); } // ISerializable implementation. called during serialization. [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)] void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) { SerializeEncoder(info); info.AddValue("encoding", this.m_encoding); info.AddValue("charLeftOver", this.charLeftOver); info.SetType(typeof(Encoding.DefaultEncoder)); } #endregion Serialization internal EncoderNLS(Encoding encoding) { this.m_encoding = encoding; this.m_fallback = this.m_encoding.EncoderFallback; this.Reset(); } // This one is used when deserializing (like UTF7Encoding.Encoder) internal EncoderNLS() { this.m_encoding = null; this.Reset(); } public override void Reset() { this.charLeftOver = (char)0; if (m_fallbackBuffer != null) m_fallbackBuffer.Reset(); } public override unsafe int GetByteCount(char[] chars, int index, int count, bool flush) { // Validate input parameters if (chars == null) throw new ArgumentNullException( "chars", Environment.GetResourceString("ArgumentNull_Array")); if (index < 0 || count < 0) throw new ArgumentOutOfRangeException((index<0 ? "index" : "count"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (chars.Length - index < count) throw new ArgumentOutOfRangeException("chars", Environment.GetResourceString("ArgumentOutOfRange_IndexCountBuffer")); // Avoid empty input problem if (chars.Length == 0) chars = new char[1]; // Just call the pointer version int result = -1; fixed (char* pChars = chars) { result = GetByteCount(pChars + index, count, flush); } return result; } public unsafe override int GetByteCount(char* chars, int count, bool flush) { // Validate input parameters if (chars == null) throw new ArgumentNullException( "chars", Environment.GetResourceString("ArgumentNull_Array")); if (count < 0) throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); this.m_mustFlush = flush; this.m_throwOnOverflow = true; return m_encoding.GetByteCount(chars, count, this); } public override unsafe int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex, bool flush) { // Validate parameters if (chars == null || bytes == null) throw new ArgumentNullException((chars == null ? "chars" : "bytes"), Environment.GetResourceString("ArgumentNull_Array")); if (charIndex < 0 || charCount < 0) throw new ArgumentOutOfRangeException((charIndex<0 ? "charIndex" : "charCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (chars.Length - charIndex < charCount) throw new ArgumentOutOfRangeException("chars", Environment.GetResourceString("ArgumentOutOfRange_IndexCountBuffer")); if (byteIndex < 0 || byteIndex > bytes.Length) throw new ArgumentOutOfRangeException("byteIndex", Environment.GetResourceString("ArgumentOutOfRange_Index")); if (chars.Length == 0) chars = new char[1]; int byteCount = bytes.Length - byteIndex; if (bytes.Length == 0) bytes = new byte[1]; // Just call pointer version fixed (char* pChars = chars) fixed (byte* pBytes = bytes) // Remember that charCount is # to decode, not size of array. return GetBytes(pChars + charIndex, charCount, pBytes + byteIndex, byteCount, flush); } public unsafe override int GetBytes(char* chars, int charCount, byte* bytes, int byteCount, bool flush) { // Validate parameters if (chars == null || bytes == null) throw new ArgumentNullException((chars == null ? "chars" : "bytes"), Environment.GetResourceString("ArgumentNull_Array")); if (byteCount < 0 || charCount < 0) throw new ArgumentOutOfRangeException((byteCount<0 ? "byteCount" : "charCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); this.m_mustFlush = flush; this.m_throwOnOverflow = true; return m_encoding.GetBytes(chars, charCount, bytes, byteCount, this); } // This method is used when your output buffer might not be large enough for the entire result. // Just call the pointer version. (This gets bytes) public override unsafe void Convert(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex, int byteCount, bool flush, out int charsUsed, out int bytesUsed, out bool completed) { // Validate parameters if (chars == null || bytes == null) throw new ArgumentNullException((chars == null ? "chars" : "bytes"), Environment.GetResourceString("ArgumentNull_Array")); if (charIndex < 0 || charCount < 0) throw new ArgumentOutOfRangeException((charIndex<0 ? "charIndex" : "charCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (byteIndex < 0 || byteCount < 0) throw new ArgumentOutOfRangeException((byteIndex<0 ? "byteIndex" : "byteCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (chars.Length - charIndex < charCount) throw new ArgumentOutOfRangeException("chars", Environment.GetResourceString("ArgumentOutOfRange_IndexCountBuffer")); if (bytes.Length - byteIndex < byteCount) throw new ArgumentOutOfRangeException("bytes", Environment.GetResourceString("ArgumentOutOfRange_IndexCountBuffer")); // Avoid empty input problem if (chars.Length == 0) chars = new char[1]; if (bytes.Length == 0) bytes = new byte[1]; // Just call the pointer version (can't do this for non-msft encoders) fixed (char* pChars = chars) { fixed (byte* pBytes = bytes) { Convert(pChars + charIndex, charCount, pBytes + byteIndex, byteCount, flush, out charsUsed, out bytesUsed, out completed); } } } // This is the version that uses pointers. We call the base encoding worker function // after setting our appropriate internal variables. This is getting bytes public override unsafe void Convert(char* chars, int charCount, byte* bytes, int byteCount, bool flush, out int charsUsed, out int bytesUsed, out bool completed) { // Validate input parameters if (bytes == null || chars == null) throw new ArgumentNullException(bytes == null ? "bytes" : "chars", Environment.GetResourceString("ArgumentNull_Array")); if (charCount < 0 || byteCount < 0) throw new ArgumentOutOfRangeException((charCount<0 ? "charCount" : "byteCount"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); // We don't want to throw this.m_mustFlush = flush; this.m_throwOnOverflow = false; this.m_charsUsed = 0; // Do conversion bytesUsed = this.m_encoding.GetBytes(chars, charCount, bytes, byteCount, this); charsUsed = this.m_charsUsed; // Its completed if they've used what they wanted AND if they didn't want flush or if we are flushed completed = (charsUsed == charCount) && (!flush || !this.HasState) && (m_fallbackBuffer == null || m_fallbackBuffer.Remaining == 0); // Our data thingys are now full, we can return } public Encoding Encoding { get { return m_encoding; } } public bool MustFlush { get { return m_mustFlush; } } // Anything left in our encoder? internal virtual bool HasState { get { return (this.charLeftOver != (char)0); } } // Allow encoding to clear our must flush instead of throwing (in ThrowBytesOverflow) internal void ClearMustFlush() { m_mustFlush = false; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ExpressionBinding.cs
- GlyphCache.cs
- InstancePersistenceCommand.cs
- ListItemCollection.cs
- PartialClassGenerationTaskInternal.cs
- WindowsFormsHost.cs
- CodeBlockBuilder.cs
- PanelDesigner.cs
- ClientSettingsStore.cs
- MessageBox.cs
- BuildManagerHost.cs
- FacetValueContainer.cs
- ZipIOModeEnforcingStream.cs
- RegexCaptureCollection.cs
- HatchBrush.cs
- StylusPointPropertyInfo.cs
- TemplateContentLoader.cs
- CharEntityEncoderFallback.cs
- AssemblyAttributesGoHere.cs
- QilReference.cs
- SpinWait.cs
- ReachSerializerAsync.cs
- AccessControlList.cs
- Ref.cs
- TreeBuilderBamlTranslator.cs
- DriveInfo.cs
- DataGridViewTextBoxColumn.cs
- ThreadStateException.cs
- AccessDataSource.cs
- DrawItemEvent.cs
- IndexExpression.cs
- EntityClassGenerator.cs
- CodeTypeConstructor.cs
- WebPartRestoreVerb.cs
- PageClientProxyGenerator.cs
- SmiRecordBuffer.cs
- OdbcParameter.cs
- InvalidWMPVersionException.cs
- CroppedBitmap.cs
- _ChunkParse.cs
- BindToObject.cs
- TypeConverterAttribute.cs
- CodePropertyReferenceExpression.cs
- ListItemCollection.cs
- IERequestCache.cs
- HashCodeCombiner.cs
- ErrorHandlerModule.cs
- DataObjectEventArgs.cs
- OutputCacheSection.cs
- MulticastOption.cs
- MatrixCamera.cs
- RangeBaseAutomationPeer.cs
- TableLayoutPanel.cs
- DataServiceHostFactory.cs
- LogRestartAreaEnumerator.cs
- IgnoreSectionHandler.cs
- OleAutBinder.cs
- HighContrastHelper.cs
- WhitespaceSignificantCollectionAttribute.cs
- ResourceContainer.cs
- XmlSchemaIdentityConstraint.cs
- CommentAction.cs
- Int64Storage.cs
- IISUnsafeMethods.cs
- DrawingVisualDrawingContext.cs
- ToolStripItemTextRenderEventArgs.cs
- GeneralTransform3DCollection.cs
- LoginView.cs
- NetCodeGroup.cs
- CriticalFinalizerObject.cs
- DataRecordObjectView.cs
- ItemCollectionEditor.cs
- TextEditorSpelling.cs
- DoubleStorage.cs
- MsmqInputSessionChannelListener.cs
- FlowDocumentScrollViewer.cs
- objectresult_tresulttype.cs
- DataKey.cs
- LayoutSettings.cs
- DataServiceQueryException.cs
- TrustLevel.cs
- EntityDataReader.cs
- OleDbCommand.cs
- SamlAuthorizationDecisionClaimResource.cs
- DrawTreeNodeEventArgs.cs
- XmlWriterTraceListener.cs
- ServiceNameElementCollection.cs
- SqlCrossApplyToCrossJoin.cs
- VisualStyleRenderer.cs
- WebFaultClientMessageInspector.cs
- FontStretches.cs
- StylusPointPropertyInfoDefaults.cs
- MessageBuffer.cs
- ZipArchive.cs
- TransformGroup.cs
- DataTableReaderListener.cs
- TreeNode.cs
- CodeTypeParameter.cs
- FrameworkElement.cs
- URLMembershipCondition.cs