reactos/sdk/lib/atl/atlcomcli.h

   1 /*
   2  * ReactOS ATL
   3  *
   4  * Copyright 2009 Andrew Hill <ash77@reactos.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #pragma once
  22
  23 #include "atlcore.h"
  24
  25
  26 #ifdef _MSC_VER
  27 // It is common to use this in ATL constructors. They only store this for later use, so the usage is safe.
  28 #pragma warning(disable:4355)
  29 #endif
  30
  31 #ifndef _ATL_PACKING
  32 #define _ATL_PACKING 8
  33 #endif
  34
  35 #ifndef _ATL_FREE_THREADED
  36 #ifndef _ATL_APARTMENT_THREADED
  37 #ifndef _ATL_SINGLE_THREADED
  38 #define _ATL_FREE_THREADED
  39 #endif
  40 #endif
  41 #endif
  42
  43 #ifndef ATLTRY
  44 #define ATLTRY(x) x;
  45 #endif
  46
  47 #ifdef _ATL_DISABLE_NO_VTABLE
  48 #define ATL_NO_VTABLE
  49 #else
  50 #define ATL_NO_VTABLE __declspec(novtable)
  51 #endif
  52
  53 namespace ATL
  54 {
  55
  56
  57 template<class T>
  58 class CComPtr
  59 {
  60 public:
  61     T *p;
  62 public:
  63     CComPtr()
  64     {
  65         p = NULL;
  66     }
  67
  68     CComPtr(T *lp)
  69     {
  70         p = lp;
  71         if (p != NULL)
  72             p->AddRef();
  73     }
  74
  75     CComPtr(const CComPtr<T> &lp)
  76     {
  77         p = lp.p;
  78         if (p != NULL)
  79             p->AddRef();
  80     }
  81
  82     ~CComPtr()
  83     {
  84         if (p != NULL)
  85             p->Release();
  86     }
  87
  88     T *operator = (T *lp)
  89     {
  90         if (p != NULL)
  91             p->Release();
  92         p = lp;
  93         if (p != NULL)
  94             p->AddRef();
  95         return *this;
  96     }
  97
  98     T *operator = (const CComPtr<T> &lp)
  99     {
 100         if (p != NULL)
 101             p->Release();
 102         p = lp.p;
 103         if (p != NULL)
 104             p->AddRef();
 105         return *this;
 106     }
 107
 108     void Release()
 109     {
 110         if (p != NULL)
 111         {
 112             p->Release();
 113             p = NULL;
 114         }
 115     }
 116
 117     void Attach(T *lp)
 118     {
 119         if (p != NULL)
 120             p->Release();
 121         p = lp;
 122     }
 123
 124     T *Detach()
 125     {
 126         T *saveP;
 127
 128         saveP = p;
 129         p = NULL;
 130         return saveP;
 131     }
 132
 133     T **operator & ()
 134     {
 135         ATLASSERT(p == NULL);
 136         return &p;
 137     }
 138
 139     operator T * ()
 140     {
 141         return p;
 142     }
 143
 144     T *operator -> ()
 145     {
 146         ATLASSERT(p != NULL);
 147         return p;
 148     }
 149 };
 150
 151
 152 class CComBSTR
 153 {
 154 public:
 155     BSTR m_str;
 156 public:
 157     CComBSTR() :
 158         m_str(NULL)
 159     {
 160     }
 161
 162     CComBSTR(LPCOLESTR pSrc)
 163     {
 164         if (pSrc == NULL)
 165             m_str = NULL;
 166         else
 167             m_str = ::SysAllocString(pSrc);
 168     }
 169
 170     CComBSTR(int length)
 171     {
 172         if (length == 0)
 173             m_str = NULL;
 174         else
 175             m_str = ::SysAllocStringLen(NULL, length);
 176     }
 177
 178     CComBSTR(int length, LPCOLESTR pSrc)
 179     {
 180         if (length == 0)
 181             m_str = NULL;
 182         else
 183             m_str = ::SysAllocStringLen(pSrc, length);
 184     }
 185
 186     CComBSTR(PCSTR pSrc)
 187     {
 188         if (pSrc)
 189         {
 190             int len = MultiByteToWideChar(CP_THREAD_ACP, 0, pSrc, -1, NULL, 0);
 191             m_str = ::SysAllocStringLen(NULL, len - 1);
 192             if (m_str)
 193             {
 194                 int res = MultiByteToWideChar(CP_THREAD_ACP, 0, pSrc, -1, m_str, len);
 195                 ATLASSERT(res == len);
 196                 if (res != len)
 197                 {
 198                     ::SysFreeString(m_str);
 199                     m_str = NULL;
 200                 }
 201             }
 202         }
 203         else
 204         {
 205             m_str = NULL;
 206         }
 207     }
 208
 209     CComBSTR(const CComBSTR &other)
 210     {
 211         m_str = other.Copy();
 212     }
 213
 214     CComBSTR(REFGUID guid)
 215     {
 216         OLECHAR szGuid[40];
 217         ::StringFromGUID2(guid, szGuid, 40);
 218         m_str = ::SysAllocString(szGuid);
 219     }
 220
 221     ~CComBSTR()
 222     {
 223         ::SysFreeString(m_str);
 224         m_str = NULL;
 225     }
 226
 227     operator BSTR () const
 228     {
 229         return m_str;
 230     }
 231
 232     BSTR *operator & ()
 233     {
 234         return &m_str;
 235     }
 236
 237     CComBSTR &operator = (const CComBSTR &other)
 238     {
 239         ::SysFreeString(m_str);
 240         m_str = other.Copy();
 241         return *this;
 242     }
 243
 244     BSTR Copy() const
 245     {
 246         if (!m_str)
 247             return NULL;
 248         return ::SysAllocStringLen(m_str, ::SysStringLen(m_str));
 249     }
 250
 251     HRESULT CopyTo(BSTR *other) const
 252     {
 253         if (!other)
 254             return E_POINTER;
 255         *other = Copy();
 256         return S_OK;
 257     }
 258
 259     bool LoadString(HMODULE module, DWORD uID)
 260     {
 261         ::SysFreeString(m_str);
 262         m_str = NULL;
 263         const wchar_t *ptr = NULL;
 264         int len = ::LoadStringW(module, uID, (PWSTR)&ptr, 0);
 265         if (len)
 266             m_str = ::SysAllocStringLen(ptr, len);
 267         return m_str != NULL;
 268     }
 269
 270     unsigned int Length() const
 271     {
 272         return ::SysStringLen(m_str);
 273     }
 274
 275     unsigned int ByteLength() const
 276     {
 277         return ::SysStringByteLen(m_str);
 278     }
 279 };
 280
 281
 282 class CComVariant : public tagVARIANT
 283 {
 284 public:
 285     CComVariant()
 286     {
 287         ::VariantInit(this);
 288     }
 289
 290     ~CComVariant()
 291     {
 292         Clear();
 293     }
 294
 295     HRESULT Clear()
 296     {
 297         return ::VariantClear(this);
 298     }
 299 };
 300
 301
 302
 303 }; // namespace ATL
 304
 305 #ifndef _ATL_NO_AUTOMATIC_NAMESPACE
 306 using namespace ATL;
 307 #endif //!_ATL_NO_AUTOMATIC_NAMESPACE
 308