mirror of
https://github.com/reactos/reactos.git
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135 lines
3.2 KiB
C++
135 lines
3.2 KiB
C++
/*
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* PROJECT: ReactOS crt library
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* LICENSE: GPLv2+ - See COPYING in the top level directory
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* PURPOSE: Compiler support for COM
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* PROGRAMMER: Thomas Faber (thomas.faber@reactos.org)
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*/
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#include <stdarg.h>
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#define WIN32_NO_STATUS
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#define _INC_WINDOWS
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#include <windef.h>
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#include <winbase.h>
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#include <comdef.h>
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/* comdef.h */
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typedef void WINAPI COM_ERROR_HANDLER(HRESULT, IErrorInfo *);
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static COM_ERROR_HANDLER *com_error_handler;
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void WINAPI _com_raise_error(HRESULT hr, IErrorInfo *perrinfo)
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{
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throw _com_error(hr, perrinfo);
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}
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void WINAPI _set_com_error_handler(COM_ERROR_HANDLER *phandler)
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{
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com_error_handler = phandler;
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}
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void WINAPI _com_issue_error(HRESULT hr)
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{
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com_error_handler(hr, NULL);
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}
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void WINAPI _com_issue_errorex(HRESULT hr, IUnknown *punk, REFIID riid)
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{
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void *pv;
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IErrorInfo *perrinfo = NULL;
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if (SUCCEEDED(punk->QueryInterface(riid, &pv)))
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{
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ISupportErrorInfo *pserrinfo = static_cast<ISupportErrorInfo *>(pv);
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if (pserrinfo->InterfaceSupportsErrorInfo(riid) == S_OK)
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(void)GetErrorInfo(0, &perrinfo);
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pserrinfo->Release();
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}
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com_error_handler(hr, perrinfo);
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}
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/* comutil.h */
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_variant_t vtMissing(DISP_E_PARAMNOTFOUND, VT_ERROR);
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namespace _com_util
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{
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BSTR WINAPI ConvertStringToBSTR(const char *pSrc)
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{
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DWORD cwch;
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BSTR wsOut(NULL);
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if (!pSrc) return NULL;
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/* Compute the needed size with the NULL terminator */
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cwch = ::MultiByteToWideChar(CP_ACP, 0, pSrc, -1, NULL, 0);
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if (cwch == 0) return NULL;
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/* Allocate the BSTR (without the NULL terminator) */
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wsOut = ::SysAllocStringLen(NULL, cwch - 1);
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if (!wsOut)
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{
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::_com_issue_error(HRESULT_FROM_WIN32(ERROR_OUTOFMEMORY));
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return NULL;
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}
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/* Convert the string */
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if (::MultiByteToWideChar(CP_ACP, 0, pSrc, -1, wsOut, cwch) == 0)
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{
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/* We failed, clean everything up */
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cwch = ::GetLastError();
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::SysFreeString(wsOut);
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wsOut = NULL;
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::_com_issue_error(!IS_ERROR(cwch) ? HRESULT_FROM_WIN32(cwch) : cwch);
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}
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return wsOut;
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}
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char* WINAPI ConvertBSTRToString(BSTR pSrc)
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{
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DWORD cb, cwch;
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char *szOut = NULL;
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if (!pSrc) return NULL;
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/* Retrieve the size of the BSTR with the NULL terminator */
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cwch = ::SysStringLen(pSrc) + 1;
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/* Compute the needed size with the NULL terminator */
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cb = ::WideCharToMultiByte(CP_ACP, 0, pSrc, cwch, NULL, 0, NULL, NULL);
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if (cb == 0)
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{
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cwch = ::GetLastError();
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::_com_issue_error(!IS_ERROR(cwch) ? HRESULT_FROM_WIN32(cwch) : cwch);
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return NULL;
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}
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/* Allocate the string */
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szOut = (char*)::operator new(cb * sizeof(char));
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if (!szOut)
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{
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::_com_issue_error(HRESULT_FROM_WIN32(ERROR_OUTOFMEMORY));
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return NULL;
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}
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/* Convert the string and NULL-terminate */
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szOut[cb - 1] = '\0';
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if (::WideCharToMultiByte(CP_ACP, 0, pSrc, cwch, szOut, cb, NULL, NULL) == 0)
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{
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/* We failed, clean everything up */
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cwch = ::GetLastError();
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::operator delete(szOut);
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szOut = NULL;
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::_com_issue_error(!IS_ERROR(cwch) ? HRESULT_FROM_WIN32(cwch) : cwch);
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}
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return szOut;
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}
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}
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