Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Net / System / Net / Mail / SevenBitStream.cs / 1 / SevenBitStream.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net.Mime { using System; using System.IO; ////// This stream validates outgoing bytes to be within the /// acceptible range of 0 - 127. Writes will throw if a /// value > 127 is found. /// internal class SevenBitStream : DelegatedStream { ////// ctor. /// /// Underlying stream internal SevenBitStream(Stream stream) : base(stream) { } ////// Writes the specified content to the underlying stream /// /// Buffer to write /// Offset within buffer to start writing /// Count of bytes to write /// Callback to call when write completes /// State to pass to callback public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state) { if (buffer == null) throw new ArgumentNullException("buffer"); if (offset < 0 || offset >= buffer.Length) throw new ArgumentOutOfRangeException("offset"); if (offset + count > buffer.Length) throw new ArgumentOutOfRangeException("count"); CheckBytes(buffer, offset, count); IAsyncResult result = base.BeginWrite(buffer, offset, count, callback, state); return result; } ////// Writes the specified content to the underlying stream /// /// Buffer to write /// Offset within buffer to start writing /// Count of bytes to write public override void Write(byte[] buffer, int offset, int count) { if (buffer == null) throw new ArgumentNullException("buffer"); if (offset < 0 || offset >= buffer.Length) throw new ArgumentOutOfRangeException("offset"); if (offset + count > buffer.Length) throw new ArgumentOutOfRangeException("count"); CheckBytes(buffer, offset, count); base.Write(buffer, offset, count); } // helper methods ////// Checks the data in the buffer for bytes > 127. /// /// Buffer containing data /// Offset within buffer to start checking /// Count of bytes to check void CheckBytes(byte[] buffer, int offset, int count) { for (int i = count; i < offset + count; i++) { if (buffer[i] > 127) throw new FormatException(SR.GetString(SR.Mail7BitStreamInvalidCharacter)); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net.Mime { using System; using System.IO; ////// This stream validates outgoing bytes to be within the /// acceptible range of 0 - 127. Writes will throw if a /// value > 127 is found. /// internal class SevenBitStream : DelegatedStream { ////// ctor. /// /// Underlying stream internal SevenBitStream(Stream stream) : base(stream) { } ////// Writes the specified content to the underlying stream /// /// Buffer to write /// Offset within buffer to start writing /// Count of bytes to write /// Callback to call when write completes /// State to pass to callback public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state) { if (buffer == null) throw new ArgumentNullException("buffer"); if (offset < 0 || offset >= buffer.Length) throw new ArgumentOutOfRangeException("offset"); if (offset + count > buffer.Length) throw new ArgumentOutOfRangeException("count"); CheckBytes(buffer, offset, count); IAsyncResult result = base.BeginWrite(buffer, offset, count, callback, state); return result; } ////// Writes the specified content to the underlying stream /// /// Buffer to write /// Offset within buffer to start writing /// Count of bytes to write public override void Write(byte[] buffer, int offset, int count) { if (buffer == null) throw new ArgumentNullException("buffer"); if (offset < 0 || offset >= buffer.Length) throw new ArgumentOutOfRangeException("offset"); if (offset + count > buffer.Length) throw new ArgumentOutOfRangeException("count"); CheckBytes(buffer, offset, count); base.Write(buffer, offset, count); } // helper methods ////// Checks the data in the buffer for bytes > 127. /// /// Buffer containing data /// Offset within buffer to start checking /// Count of bytes to check void CheckBytes(byte[] buffer, int offset, int count) { for (int i = count; i < offset + count; i++) { if (buffer[i] > 127) throw new FormatException(SR.GetString(SR.Mail7BitStreamInvalidCharacter)); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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