add new "win_version" setting to fake the reported windows version

inc/config.h

@@ -57,6 +57,7 @@ typedef struct CNCDDRAWCONFIG
     int fixchilds;
     BOOL hook_peekmessage;
     BOOL hook_getmessage;
+    char win_version[32];
 
     /* Undocumented settings */
 

inc/hook.h

@@ -70,6 +70,8 @@ typedef HMODULE(WINAPI* LOADLIBRARYEXAPROC)(LPCSTR, HANDLE, DWORD);
 typedef HMODULE(WINAPI* LOADLIBRARYEXWPROC)(LPCWSTR, HANDLE, DWORD);
 typedef FARPROC(WINAPI* GETPROCADDRESSPROC)(HMODULE, LPCSTR);
 typedef BOOL(WINAPI* GETDISKFREESPACEAPROC)(LPCSTR, LPDWORD, LPDWORD, LPDWORD, LPDWORD);
+typedef DWORD(WINAPI* GETVERSIONPROC)(void);
+typedef BOOL(WINAPI* GETVERSIONEXAPROC)(LPOSVERSIONINFOA);
 typedef HRESULT(WINAPI* COCREATEINSTANCEPROC)(REFCLSID, LPUNKNOWN, DWORD, REFIID, LPVOID*);
 typedef MCIERROR(WINAPI* MCISENDCOMMANDAPROC)(MCIDEVICEID, UINT, DWORD_PTR, DWORD_PTR);
 typedef LPTOP_LEVEL_EXCEPTION_FILTER(WINAPI* SETUNHANDLEDEXCEPTIONFILTERPROC)(LPTOP_LEVEL_EXCEPTION_FILTER);
@@ -120,6 +122,8 @@ extern LOADLIBRARYEXAPROC real_LoadLibraryExA;
 extern LOADLIBRARYEXWPROC real_LoadLibraryExW;
 extern GETPROCADDRESSPROC real_GetProcAddress;
 extern GETDISKFREESPACEAPROC real_GetDiskFreeSpaceA;
+extern GETVERSIONPROC real_GetVersion;
+extern GETVERSIONEXAPROC real_GetVersionExA;
 extern COCREATEINSTANCEPROC real_CoCreateInstance;
 extern MCISENDCOMMANDAPROC real_mciSendCommandA;
 extern SETUNHANDLEDEXCEPTIONFILTERPROC real_SetUnhandledExceptionFilter;

inc/winapi_hooks.h

@@ -72,6 +72,9 @@ BOOL WINAPI fake_GetDiskFreeSpaceA(
     LPDWORD lpNumberOfFreeClusters,
     LPDWORD lpTotalNumberOfClusters);
 
+DWORD WINAPI fake_GetVersion(void);
+BOOL WINAPI fake_GetVersionExA(LPOSVERSIONINFOA lpVersionInformation);
+
 HWND WINAPI fake_CreateWindowExA(
     DWORD dwExStyle, LPCSTR lpClassName, LPCSTR lpWindowName, DWORD dwStyle, int X, int Y,
     int nWidth, int nHeight, HWND hWndParent, HMENU hMenu, HINSTANCE hInstance, LPVOID lpParam);

src/config.c

@@ -69,6 +69,7 @@ void cfg_load()
     GET_INT(g_config.fixchilds, "fixchilds", FIX_CHILDS_DETECT_PAINT);
     GET_BOOL(g_config.hook_peekmessage, "hook_peekmessage", FALSE);
     GET_BOOL(g_config.hook_getmessage, "hook_getmessage", FALSE);
+    GET_STRING("win_version", "", g_config.win_version, sizeof(g_config.win_version));
 
     /* Undocumented settings */
 
@@ -323,6 +324,7 @@ static void cfg_create_ini()
             "lock_mouse_top_left=false\n"
             "no_compat_warning=false\n"
             "remove_menu=false\n"
+            ";win_version=95\n"
             "\n"
             "\n"
             "\n"

src/hook.c

@@ -63,6 +63,8 @@ LOADLIBRARYEXAPROC real_LoadLibraryExA = LoadLibraryExA;
 LOADLIBRARYEXWPROC real_LoadLibraryExW = LoadLibraryExW;
 GETPROCADDRESSPROC real_GetProcAddress = GetProcAddress;
 GETDISKFREESPACEAPROC real_GetDiskFreeSpaceA = GetDiskFreeSpaceA;
+GETVERSIONPROC real_GetVersion = GetVersion;
+GETVERSIONEXAPROC real_GetVersionExA = GetVersionExA;
 COCREATEINSTANCEPROC real_CoCreateInstance = CoCreateInstance;
 MCISENDCOMMANDAPROC real_mciSendCommandA = mciSendCommandA;
 SETUNHANDLEDEXCEPTIONFILTERPROC real_SetUnhandledExceptionFilter = SetUnhandledExceptionFilter;
@@ -168,6 +170,8 @@ HOOKLIST g_hook_hooklist[] =
             { "LoadLibraryExW", (PROC)fake_LoadLibraryExW, (PROC*)&real_LoadLibraryExW, HOOK_SKIP_2 },
             { "GetProcAddress", (PROC)fake_GetProcAddress, (PROC*)&real_GetProcAddress, HOOK_SKIP_2 },
             { "GetDiskFreeSpaceA", (PROC)fake_GetDiskFreeSpaceA, (PROC*)&real_GetDiskFreeSpaceA, HOOK_SKIP_2 },
+            { "GetVersion", (PROC)fake_GetVersion, (PROC*)&real_GetVersion, HOOK_SKIP_2 },
+            { "GetVersionExA", (PROC)fake_GetVersionExA, (PROC*)&real_GetVersionExA, HOOK_SKIP_2 },
 #if defined(_DEBUG) && defined(__GNUC__)
             { "SetUnhandledExceptionFilter", (PROC)fake_SetUnhandledExceptionFilter, (PROC*)&real_SetUnhandledExceptionFilter, 0 },
 #endif

src/winapi_hooks.c

@@ -1548,6 +1548,98 @@ BOOL WINAPI fake_GetDiskFreeSpaceA(
     return result; 
 }
 
+DWORD WINAPI fake_GetVersion()
+{
+    if (_strcmpi(g_config.win_version, "95") == 0) 
+        return 0xC3B60004;
+
+    if (_strcmpi(g_config.win_version, "98") == 0)
+        return 0xC0000A04;
+
+    if (_strcmpi(g_config.win_version, "nt4") == 0)
+        return 0x05650004;
+
+    if (_strcmpi(g_config.win_version, "2000") == 0)
+        return 0x08930005;
+
+    if (_strcmpi(g_config.win_version, "xp") == 0)
+        return 0x0A280105;
+
+    return real_GetVersion();
+}
+
+BOOL WINAPI fake_GetVersionExA(LPOSVERSIONINFOA info)
+{
+    if (info && info->dwOSVersionInfoSize == sizeof(OSVERSIONINFOA))
+    {
+        if (_strcmpi(g_config.win_version, "95") == 0)
+        {
+            *info = (OSVERSIONINFOA){ sizeof(OSVERSIONINFOA), 4, 0, 950, 1, "" };
+            return TRUE;
+        }
+
+        if (_strcmpi(g_config.win_version, "98") == 0)
+        {
+            *info = (OSVERSIONINFOA){ sizeof(OSVERSIONINFOA), 4, 10, 67766446, 1, "" };
+            return TRUE;
+        }
+
+        if (_strcmpi(g_config.win_version, "nt4") == 0) 
+        {
+            *info = (OSVERSIONINFOA){ sizeof(OSVERSIONINFOA), 4, 0, 1381, 2, "Service Pack 5" };
+            return TRUE;
+        }
+
+        if (_strcmpi(g_config.win_version, "2000") == 0) 
+        {
+            *info = (OSVERSIONINFOA){ sizeof(OSVERSIONINFOA), 5, 0, 2195, 2, "" };
+            return TRUE;
+        }
+
+        if (_strcmpi(g_config.win_version, "xp") == 0) 
+        {
+            *info = (OSVERSIONINFOA){ sizeof(OSVERSIONINFOA), 5, 1, 2600, 2, "Service Pack 3" };
+            return TRUE;
+        }
+    }
+
+    if (info && info->dwOSVersionInfoSize == sizeof(OSVERSIONINFOEXA))
+    {
+        LPOSVERSIONINFOEXA ex = (LPOSVERSIONINFOEXA)info;
+        if (_strcmpi(g_config.win_version, "95") == 0)
+        {
+            *ex = (OSVERSIONINFOEXA){ sizeof(OSVERSIONINFOEXA), 4, 0, 950, 1, "", 1, 0, 256, 1, 30 };
+            return TRUE;
+        }
+
+        if (_strcmpi(g_config.win_version, "98") == 0) 
+        {
+            *ex = (OSVERSIONINFOEXA){ sizeof(OSVERSIONINFOEXA), 4, 10, 67766446, 1, "", 1, 0, 256, 1, 30 };
+            return TRUE;
+        }
+
+        if (_strcmpi(g_config.win_version, "nt4") == 0) 
+        {
+            *ex = (OSVERSIONINFOEXA){ sizeof(OSVERSIONINFOEXA), 4, 0, 1381, 2, "Service Pack 5", 5, 0, 256, 1, 30 };
+            return TRUE;
+        }
+
+        if (_strcmpi(g_config.win_version, "2000") == 0) 
+        {
+            *ex = (OSVERSIONINFOEXA){ sizeof(OSVERSIONINFOEXA), 5, 0, 2195, 2, "", 0, 0, 256, 1, 30 };
+            return TRUE;
+        }
+
+        if (_strcmpi(g_config.win_version, "xp") == 0) 
+        {
+            *ex = (OSVERSIONINFOEXA){ sizeof(OSVERSIONINFOEXA), 5, 1, 2600, 2, "Service Pack 3", 3, 0, 256, 1, 30 };
+            return TRUE;
+        }
+    }
+
+    return real_GetVersionExA(info);
+}
+
 BOOL WINAPI fake_DestroyWindow(HWND hWnd)
 {
     TRACE("DestroyWindow(hwnd=%p) - g_ddraw.hwnd=%p [%p]\n", hWnd, g_ddraw.hwnd, _ReturnAddress());