+++ /dev/null
-/* File: dllproxy.c
- * Author: Jochen Tucht 2003/01/11
- * Copyright (C) 2003 herbert dahm datensysteme GmbH
- *
- * Purpose: Provide a prototyped proxy object for a DLL to be loaded on demand.
- * Load the DLL when the proxy object is accessed for the first time.
- * If the DLL lacks a function which is declared in the proxy object,
- * issue an error message at load time, but allow program execution to
- * continue. If the program tries to call a missing function, issue an
- * error message, tell the user that it may be unsafe to continue
- * program execution, but still allow program execution to continue.
- *
- * Remarks: requires Win32
- *
- * Options: -DALLOCA_RECOVERY generates additional code to fix the stack pointer
- * after an attempt to call a missing function. This is the default for
- * MSC. Specify -DNO_ALLOCA_RECOVERY to explicitly cancel this option.
- * The option makes use of _alloca(), which is intrinsic in MSC, but
- * may not be supported by other compilers. Since _alloca() is not
- * exactly designed for the given purpose, the approach may fail. In
- * case of doubt, just cancel the option.
- *
- * License: THIS FILE CONTAINS FREE SOURCE CODE. IT IS PROVIDED *AS IS*, WITHOUT
- * WARRANTY OF ANY KIND. YOU MAY USE IT AT YOUR OWN RISK, AS LONG AS
- * YOU KEEP IT IN A SEPARATE FILE AND PRESERVE THIS COMMENT.
- * CHANGES MUST BE RECORDED IN THE MODIFICATION HISTORY BELOW SO THERE
- * IS EVIDENCE THAT THE FILE DIFFERS FROM EARLIER RELEASES. THE LEVEL
- * OF DETAIL IS UP TO YOU. YOU MAY SET THE BY: ENTRY TO "NOBODY@ALL"
- * IF YOU DON'T WANT TO EXPOSE YOUR NAME. SUBSEQUENT CHANGES MAY BE
- * REFLECTED BY A SINGLE RECORD CARRYING THE DATE OF THE LATEST CHANGE.
- *
-
-DATE: BY: DESCRIPTION:
-========== ================== ================================================
-2003/03/15 J.Tucht module itself & DLL proxies may reside in a DLL
-2003/03/16 J.Tucht DLL proxies may reside in stack frame
-2003/03/29 J.Tucht ALLOCA_RECOVERY now thread safe; does no longer
- rely on _alloca(); may also work with GCC
-2007/08/11 Kimmo Varis Add ifdef removing inline assembly from 64-bit
- builds. I know it breaks plugins but its more
- important to be able to build 64-bit now.
-
-*/
-
-#if defined(_MSC_VER)&&!defined(NO_ALLOCA_RECOVERY)||defined(ALLOCA_RECOVERY)
-#undef ALLOCA_RECOVERY
-#define ALLOCA_RECOVERY(X) X
-#else
-#undef ALLOCA_RECOVERY
-#define ALLOCA_RECOVERY(X)
-#endif
-
-#ifdef _MSC_VER
-#pragma warning(disable: 4100)
-#define UNUSED(ARG) ARG
-#else
-#define UNUSED(ARG)
-#endif
-
-//#define _WIN32_IE 0x0300
-//#define _WIN32_WINNT 0x0400
-
-#define NONAMELESSUNION // avoid warning C4201
-
-struct IShellView; // avoid MSC warning C4115
-struct _RPC_ASYNC_STATE; // avoid MSC warning C4115
-
-#include <shlobj.h>
-#include <shlwapi.h>
-#include "dllproxy.h"
-
-#define IS_PTR(p) ((p) != (LPVOID)0)
-
-#define MB_DLLPROXY MB_TASKMODAL | MB_TOPMOST | MB_ICONSTOP
-
-static VOID NTAPI Complain(LPCSTR complain, LPCSTR caption)
-{
- if (MessageBoxA(0, complain, caption, MB_DLLPROXY | MB_YESNO) != IDYES)
- {
- ExitProcess(3);
- }
-}
-
-#if ALLOCA_RECOVERY(TRUE)-0
-#ifdef _MSC_VER
-#pragma message("ALLOCA_RECOVERY(TRUE)")
-#endif
-
-static DWORD ThreadTopOfStack = 0xFFFFFFFF;
-
-static LPVOID NTAPI ComplainUnresolved()
-{
- Complain(DllProxy_ModuleState.Complain.Invoke, "DLLPROXY");
- return TlsGetValue(ThreadTopOfStack);
-}
-
-static INT_PTR NTAPI Unresolved()
-{
- // declare a variable to produce a stack frame
- int Unresolved = 0;
-
-#ifndef _WIN64 // 64-bit compiler errors at inline asm
-#ifdef _MSC_VER
- __asm
- {
- call ComplainUnresolved
- mov esp, ebp
- pop ebp
- pop edx
- mov esp, eax
- xor eax, eax
- jmp edx
- }
-#endif
-#ifdef __MINGW_H
- asm
- (
- "\n call *%0" // call ComplainUnresolved
- "\n mov %%ebp, %%esp"
- "\n pop %%ebp"
- "\n pop %%edx"
- "\n mov %%eax, %%esp"
- "\n xor %%eax, %%eax"
- "\n push %%edx" // as warns about jmp %edx
- "\n ret"
- : /* no explicit outputs */
- : "o" (ComplainUnresolved)
- );
-#endif
-#endif // _WIN64
- return Unresolved;
-}
-
-#else
-#ifdef _MSC_VER
-#pragma message("ALLOCA_RECOVERY(FALSE)")
-#endif
-
-static INT_PTR NTAPI Unresolved()
-{
- Complain(DllProxy_ModuleState.Complain.Invoke, "DLLPROXY");
- return 0;
-}
-
-#endif
-
-static VOID NTAPI Load(HMODULE *phModule)
-{
-#if ALLOCA_RECOVERY(TRUE)-0
- if (ThreadTopOfStack == 0xFFFFFFFF)
- ThreadTopOfStack = TlsAlloc();
- TlsSetValue(ThreadTopOfStack, &phModule + 1);
-#endif
- if (*phModule == 0)
- {
- LPCSTR p = (LPCSTR)(phModule + 1);
- LPCSTR cModule = StrRChrA(p, 0, ';');
- FARPROC *ppfn = (FARPROC *)p;
- HMODULE hModule = LoadLibraryA(cModule + 1);
- CHAR cPath[260];
- GetModuleFileNameA(hModule, cPath, sizeof cPath);
- if (hModule == 0)
- {
- Complain(DllProxy_ModuleState.Complain.LoadLibrary, cModule);
- }
- cModule = PathFindFileNameA(cPath);
- while IS_PTR(p = StrChrA(p,'*'))
- {
- CHAR cExport[260];
- LPCSTR q = StrChrA(p,')');
- FARPROC pfn = GetProcAddress(hModule, lstrcpynA(cExport, p + 1, (int)(q - p)));
- p = StrChrA(q,';') + 1;
- if (pfn == 0)
- {
- pfn = Unresolved;
- if (hModule)
- {
- CHAR cMsg[2600];
- wsprintfA(cMsg, "%s:\n%s%s", cPath, cExport,
- DllProxy_ModuleState.Complain.GetProcAddress);
- Complain(cMsg, cModule);
- }
- }
- *ppfn++ = pfn;
- }
- *phModule = GetModuleHandleA(cPath);
- }
-}
-
-struct DllProxy_ModuleState DllProxy_ModuleState =
-{
- {
- // Complain.LoadLibrary
- "Failed to load library!\n"
- "Continue anyway?",
- // Complain.GetProcAddress
- "() unresolved!\n"
- "Continue anyway?",
- // Complain.Invoke
- "Attempt to call unresolved external!\n"
- "It may be unsafe to continue!\n"
- "Continue anyway?"
- },
- // Load()
- Load,
- // Unresolved()
- Unresolved,
-};
+++ /dev/null
-#pragma once
-
-struct DllProxy_ModuleState
-{
-// error messages exposed here just in case anybody desires localization...
- struct
- {
- LPCSTR LoadLibrary; // the DLL could not be loaded
- LPCSTR GetProcAddress; // the DLL is lacking a function
- LPCSTR Invoke; // attempt to call a missing function
- } Complain;
- VOID(NTAPI*Load)(HMODULE*);
- FARPROC Unresolved; // placeholder for missing functions
-};
-
-#ifndef POLARITY
-#define POLARITY
-#endif
-
-EXTERN_C struct DllProxy_ModuleState POLARITY DllProxy_ModuleState;
-
-#define DLLPROXY(NAME) (DllProxy_ModuleState.Load(&NAME.DLL),(struct NAME*)&NAME)
-
-#define EXPORT_DLLPROXY(NAME,MODULE,P) \
- struct NAME{HMODULE DLL;P}; \
- struct {HMODULE DLL;CHAR SIG[sizeof#P MODULE + (sizeof MODULE == 1 ? MAX_PATH : 0)];} NAME = {0, #P MODULE};
-
-#define IMPORT_DLLPROXY(NAME,MODULE,P) \
- struct NAME{HMODULE DLL;P}; \
- extern struct {HMODULE DLL;CHAR SIG[sizeof#P MODULE + (sizeof MODULE == 1 ? MAX_PATH : 0)];} NAME;
-
-#define DLL_EXPORT_DLLPROXY(NAME,MODULE,P) \
- struct NAME {HMODULE DLL;P}; \
- struct {HMODULE DLL;CHAR SIG[sizeof#P MODULE + (sizeof MODULE == 1 ? MAX_PATH : 0)];} __declspec(dllexport) NAME = {0, #P MODULE};
-
-#define DLL_IMPORT_DLLPROXY(NAME,MODULE,P) \
- struct NAME{HMODULE DLL;P}; \
- extern struct {HMODULE DLL;CHAR SIG[sizeof#P MODULE + (sizeof MODULE == 1 ? MAX_PATH : 0)];} __declspec(dllimport) NAME;
-
-#undef POLARITY
#include <stdarg.h>
#include <strsafe.h>
#include "lwdisp.h"
-#include "dllproxy.h"
/**
* @brief Display or return error message string (from
LPDISPATCH CreateDispatchBySourceAndCLSID(LPCTSTR source, CLSID *pObjectCLSID)
{
- SCODE sc;
LPDISPATCH pv = NULL;
- IClassFactory *piClassFactory;
- EXPORT_DLLPROXY
- (
- Dll, "",
- HRESULT(NTAPI*DllGetClassObject)(REFCLSID,REFIID,IClassFactory**);
- );
- mycpyt2a(source, Dll.SIG+strlen(Dll.SIG), sizeof(Dll.SIG)-strlen(Dll.SIG));
- if ((FARPROC)DLLPROXY(Dll)->DllGetClassObject != DllProxy_ModuleState.Unresolved)
- if (SUCCEEDED(sc=DLLPROXY(Dll)->DllGetClassObject(pObjectCLSID, &IID_IClassFactory, &piClassFactory)))
+ HMODULE hLibrary = LoadLibrary(source);
+ if (hLibrary)
+ {
+ HRESULT (NTAPI*DllGetClassObject)(REFCLSID,REFIID,IClassFactory**)
+ = (HRESULT(NTAPI*)(REFCLSID, REFIID, IClassFactory**))GetProcAddress(hLibrary, "DllGetClassObject");
+ if (DllGetClassObject)
{
- sc=piClassFactory->lpVtbl->CreateInstance(piClassFactory, 0, &IID_IDispatch, &pv);
+ SCODE sc;
+ IClassFactory *piClassFactory;
+ if (SUCCEEDED(sc = DllGetClassObject(pObjectCLSID, &IID_IClassFactory, &piClassFactory)))
+ {
+ sc = piClassFactory->lpVtbl->CreateInstance(piClassFactory, 0, &IID_IDispatch, &pv);
+ }
}
-
+ if (!pv)
+ FreeLibrary(hLibrary);
+ }
return pv;
}
<ClCompile Include="DirViewColItems.cpp">\r
<PrecompiledHeader>NotUsing</PrecompiledHeader>\r
</ClCompile>\r
- <ClCompile Include="Common\dllproxy.c">\r
- <PrecompiledHeader>NotUsing</PrecompiledHeader>\r
- </ClCompile>\r
<ClCompile Include="dllpstub.cpp">\r
<PrecompiledHeader>NotUsing</PrecompiledHeader>\r
</ClCompile>\r
<ClInclude Include="DirTravel.h" />\r
<ClInclude Include="DirView.h" />\r
<ClInclude Include="DirViewColItems.h" />\r
- <ClInclude Include="Common\dllproxy.h" />\r
<ClInclude Include="dllpstub.h" />\r
<ClInclude Include="EditorFilepathBar.h" />\r
<ClInclude Include="EncodingErrorBar.h" />\r
<ClCompile Include="DirTravel.cpp">\r
<Filter>Source Files</Filter>\r
</ClCompile>\r
- <ClCompile Include="Common\dllproxy.c">\r
- <Filter>Source Files</Filter>\r
- </ClCompile>\r
<ClCompile Include="dllpstub.cpp">\r
<Filter>Source Files</Filter>\r
</ClCompile>\r
<ClInclude Include="DirTravel.h">\r
<Filter>Header Files</Filter>\r
</ClInclude>\r
- <ClInclude Include="Common\dllproxy.h">\r
- <Filter>Header Files</Filter>\r
- </ClInclude>\r
<ClInclude Include="dllpstub.h">\r
<Filter>Header Files</Filter>\r
</ClInclude>\r
<ClCompile Include="..\..\Src\DirItem.cpp" />\r
<ClCompile Include="..\..\Src\DirScan.cpp" />\r
<ClCompile Include="..\..\Src\DirTravel.cpp" />\r
- <ClCompile Include="..\..\Src\Common\dllproxy.c" />\r
<ClCompile Include="..\..\Src\Environment.cpp" />\r
<ClCompile Include="..\..\Src\FileFilter.cpp" />\r
<ClCompile Include="..\..\Src\FileFilterHelper.cpp" />\r
<ClInclude Include="..\..\Src\DirItem.h" />\r
<ClInclude Include="..\..\Src\DirScan.h" />\r
<ClInclude Include="..\..\Src\DirTravel.h" />\r
- <ClInclude Include="..\..\Src\Common\dllproxy.h" />\r
<ClInclude Include="..\..\Src\Environment.h" />\r
<ClInclude Include="..\..\Src\FileFilter.h" />\r
<ClInclude Include="..\..\Src\FileFilterHelper.h" />\r
<ClCompile Include="..\..\Src\DirTravel.cpp">\r
<Filter>Source Files</Filter>\r
</ClCompile>\r
- <ClCompile Include="..\..\Src\Common\dllproxy.c">\r
- <Filter>Source Files</Filter>\r
- </ClCompile>\r
<ClCompile Include="..\..\Src\Environment.cpp">\r
<Filter>Source Files</Filter>\r
</ClCompile>\r
<ClInclude Include="..\..\Src\DirTravel.h">\r
<Filter>Header Files</Filter>\r
</ClInclude>\r
- <ClInclude Include="..\..\Src\Common\dllproxy.h">\r
- <Filter>Header Files</Filter>\r
- </ClInclude>\r
<ClInclude Include="..\..\Src\Environment.h">\r
<Filter>Header Files</Filter>\r
</ClInclude>\r
\r
OBJS=\\r
../../Src/Common/coretools.o \\r
-../../Src/Common/dllproxy.o \\r
../../Src/Common/lwdisp.o \\r
../../Src/Common/multiformatText.o \\r
../../Src/Common/OptionsMgr.o \\r
<ClCompile Include="..\..\..\Src\DiffItem.cpp" />\r
<ClCompile Include="..\..\..\Src\diffutils\src\Diff.cpp" />\r
<ClCompile Include="..\..\..\Src\DirItem.cpp" />\r
- <ClCompile Include="..\..\..\Src\Common\dllproxy.c" />\r
<ClCompile Include="..\..\..\Src\Environment.cpp" />\r
<ClCompile Include="..\..\..\Src\Common\ExConverter.cpp" />\r
<ClCompile Include="..\..\..\Src\FileFilter.cpp" />\r
<ClInclude Include="..\..\..\Src\CompareEngines\DiffUtils.h" />\r
<ClInclude Include="..\..\..\Src\DiffItem.h" />\r
<ClInclude Include="..\..\..\Src\DirItem.h" />\r
- <ClInclude Include="..\..\..\Src\Common\dllproxy.h" />\r
<ClInclude Include="..\..\..\Src\Environment.h" />\r
<ClInclude Include="..\..\..\Src\Common\ExConverter.h" />\r
<ClInclude Include="..\..\..\Src\FileFilter.h" />\r
<ClCompile Include="..\..\..\Src\DirItem.cpp">\r
<Filter>Source Files</Filter>\r
</ClCompile>\r
- <ClCompile Include="..\..\..\Src\Common\dllproxy.c">\r
- <Filter>Source Files</Filter>\r
- </ClCompile>\r
<ClCompile Include="..\..\..\Src\Environment.cpp">\r
<Filter>Source Files</Filter>\r
</ClCompile>\r
<ClInclude Include="..\..\..\Src\DirItem.h">\r
<Filter>Header Files</Filter>\r
</ClInclude>\r
- <ClInclude Include="..\..\..\Src\Common\dllproxy.h">\r
- <Filter>Header Files</Filter>\r
- </ClInclude>\r
<ClInclude Include="..\..\..\Src\Environment.h">\r
<Filter>Header Files</Filter>\r
</ClInclude>\r
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