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/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Speech / Src / Internal / StreamMarshaler.cs / 1 / StreamMarshaler.cs
//---------------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // // Description: // Stream Helper. // Allocates a global memory buffer to do marshaling between a // binary and a structured data. The global memory size increases and // never shrinks. // ASAP. // // History: // 5/1/2004 [....] //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.IO; using System.Runtime.InteropServices; using System.Text; #pragma warning disable 1634, 1691 // Allows suppression of certain PreSharp messages. namespace System.Speech.Internal { ////// Summary description for StreamMarshaler. /// internal sealed class StreamMarshaler : IDisposable { //******************************************************************* // // Constructors // //******************************************************************* #region Constructors internal StreamMarshaler () { } internal StreamMarshaler (Stream stream) { _stream = stream; } public void Dispose () { _safeHMem.Dispose (); } #endregion //******************************************************************** // // Internal Methods // //******************************************************************* #region internal Methods internal void ReadArray(T [] ao, int c) { Type type = typeof (T); int sizeOfOne = Marshal.SizeOf (type); int sizeObject = sizeOfOne * c; byte[] ab = Helpers.ReadStreamToByteArray(_stream, sizeObject); IntPtr buffer = _safeHMem.Buffer (sizeObject); Marshal.Copy (ab, 0, buffer, sizeObject); for (int i = 0; i < c; i++) { ao [i] = (T) Marshal.PtrToStructure ((IntPtr) ((long) buffer + i * sizeOfOne), type); } } internal void WriteArray (T [] ao, int c) { Type type = typeof (T); int sizeOfOne = Marshal.SizeOf (type); int sizeObject = sizeOfOne * c; byte [] ab = new byte [sizeObject]; IntPtr buffer = _safeHMem.Buffer (sizeObject); for (int i = 0; i < c; i++) { Marshal.StructureToPtr (ao [i], (IntPtr) ((long) buffer + i * sizeOfOne), false); } Marshal.Copy (buffer, ab, 0, sizeObject); _stream.Write (ab, 0, sizeObject); } internal void ReadArrayChar (char [] ach, int c) { int sizeObject = c * Helpers._sizeOfChar; if (sizeObject > 0) { byte[] ab = Helpers.ReadStreamToByteArray(_stream, sizeObject); IntPtr buffer = _safeHMem.Buffer (sizeObject); Marshal.Copy (ab, 0, buffer, sizeObject); Marshal.Copy (buffer, ach, 0, c); } } #pragma warning disable 56518 // BinaryReader can't be disposed because underlying stream still in use. // Helper method to read a Unicode string from a stream. internal string ReadNullTerminatedString () { BinaryReader br = new BinaryReader(_stream, Encoding.Unicode); StringBuilder stringBuilder = new StringBuilder(); while (true) { char c = br.ReadChar(); if (c == '\0') { break; } else { stringBuilder.Append(c); } } return stringBuilder.ToString(); } #pragma warning restore 56518 internal void WriteArrayChar(char[] ach, int c) { int sizeObject = c * Helpers._sizeOfChar; if (sizeObject > 0) { byte [] ab = new byte [sizeObject]; IntPtr buffer = _safeHMem.Buffer (sizeObject); Marshal.Copy (ach, 0, buffer, c); Marshal.Copy (buffer, ab, 0, sizeObject); _stream.Write (ab, 0, sizeObject); } } internal void ReadStream (object o) { int sizeObject = Marshal.SizeOf (o.GetType ()); byte[] ab = Helpers.ReadStreamToByteArray(_stream, sizeObject); IntPtr buffer = _safeHMem.Buffer (sizeObject); Marshal.Copy (ab, 0, buffer, sizeObject); Marshal.PtrToStructure (buffer, o); } internal void WriteStream (object o) { int sizeObject = Marshal.SizeOf (o.GetType ()); byte [] ab = new byte [sizeObject]; IntPtr buffer = _safeHMem.Buffer (sizeObject); Marshal.StructureToPtr (o, buffer, false); Marshal.Copy (buffer, ab, 0, sizeObject); // Read the Header _stream.Write (ab, 0, sizeObject); } #endregion //******************************************************************** // // Internal Fields // //******************************************************************** #region internal Fields internal Stream Stream { get { return _stream; } #if VSCOMPILE set { _stream = value; } #endif } internal uint Position { // get // { // return (uint) _stream.Position; // } set { _stream.Position = value; } } #endregion //******************************************************************* // // Private Fields // //******************************************************************** #region Private Fields private HGlobalSafeHandle _safeHMem = new HGlobalSafeHandle (); private Stream _stream; #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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