/***********************************************************************\ * Virtuoso.Miranda.Plugins (Hyphen) * * Provides a managed wrapper for API of IM client Miranda. * * Copyright (C) 2006-2009 virtuoso * * deml.tomas@seznam.cz * * * * This library is free software; you can redistribute it and/or * * modify it under the terms of the GNU Lesser General Public * * License as published by the Free Software Foundation; either * * version 2.1 of the License, or (at your option) any later version. * * * * This library is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * * Lesser General Public License for more details. * \***********************************************************************/ using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; using Virtuoso.Miranda.Plugins.Infrastructure; using Virtuoso.Miranda.Plugins.Resources; namespace Virtuoso.Miranda.Plugins.Native { public enum StringEncoding { Ansi, Unicode, MirandaDefault } public struct UnmanagedStringHandle : IUnmanagedMemoryHandle { #region Fields private IntPtr intPtr; public static readonly UnmanagedStringHandle Empty = new UnmanagedStringHandle(); private string originalString; private StringEncoding encoding; #endregion #region .ctors public UnmanagedStringHandle(string str, StringEncoding encoding) { reEval: switch (encoding) { case StringEncoding.Unicode: this.intPtr = Marshal.StringToHGlobalUni(str); break; case StringEncoding.Ansi: this.intPtr = Marshal.StringToHGlobalAnsi(str); break; default: encoding = MirandaEnvironment.MirandaStringEncoding; if (encoding == StringEncoding.MirandaDefault) throw new ArgumentException(TextResources.ExceptionMsg_CannotDetectMirandaDefaultStringEncoding); goto reEval; } this.originalString = str; this.encoding = encoding; } #endregion #region Properties public string OriginalString { get { return originalString; } } public StringEncoding Encoding { get { return encoding; } } public IntPtr IntPtr { get { return intPtr; } } public static implicit operator IntPtr(UnmanagedStringHandle operand) { return operand.IntPtr; } [CLSCompliant(false)] public static implicit operator UIntPtr(UnmanagedStringHandle operand) { return Translate.ToHandle(operand.IntPtr); } public int Size { get { if (!IsValid) return 0; switch (encoding) { case StringEncoding.Ansi: return System.Text.Encoding.Default.GetByteCount(originalString); case StringEncoding.Unicode: return System.Text.Encoding.Unicode.GetByteCount(originalString); default: return -1; } } } public bool IsValid { get { return (intPtr != IntPtr.Zero); } } #endregion #region Methods public void Free() { if (IsValid) { Marshal.FreeHGlobal(intPtr); intPtr = IntPtr.Zero; } } void IDisposable.Dispose() { Free(); } #endregion } }