load SHGetFolderPath from shfolder.dll dynamically to remove the dependency (should...

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@8256 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/fs.c b/fs.c
index 1eded56cf09094516dfa8d260e1227dd08fe94cc..e6d69f6583233981129388dd79e0527a86418d8f 100644 (file)
--- a/fs.c
+++ b/fs.c
@@ -318,6 +318,15 @@ static dllfunction_t zlibfuncs[] =
 // Handle for Zlib DLL
 static dllhandle_t zlib_dll = NULL;
 
+#ifdef WIN32
+static HRESULT (WINAPI *qSHGetFolderPath) (HWND hwndOwner, int nFolder, HANDLE hToken, DWORD dwFlags, LPTSTR pszPath);
+static dllfunction_t shfolderfuncs[] =
+{
+       {"SHGetFolderPathA", (void **) &qSHGetFolderPath},
+       {NULL, NULL}
+};
+static dllhandle_t shfolder_dll = NULL;
+#endif
 
 /*
 ====================
@@ -1014,9 +1023,8 @@ void FS_AddGameHierarchy (const char *dir)
        char userdir[MAX_QPATH];
 #ifdef WIN32
        TCHAR mydocsdir[MAX_PATH + 1];
-#else
-       const char *homedir;
 #endif
+       const char *homedir;
 
        // Add the common game directory
        FS_AddGameDirectory (va("%s%s/", fs_basedir, dir));
@@ -1025,14 +1033,36 @@ void FS_AddGameHierarchy (const char *dir)
 
        // Add the personal game directory
 #ifdef WIN32
-       if(SHGetFolderPath(NULL, CSIDL_PERSONAL, NULL, 0, mydocsdir) == S_OK)
+       if(qSHGetFolderPath && (qSHGetFolderPath(NULL, CSIDL_PERSONAL, NULL, 0, mydocsdir) == S_OK))
+       {
                dpsnprintf(userdir, sizeof(userdir), "%s/My Games/%s/", mydocsdir, gameuserdirname);
+               Con_DPrintf("Obtained personal directory %s from SHGetFolderPath\n", userdir);
+       }
+       else
+       {
+               // use the environment
+               homedir = getenv ("USERPROFILE");
+               if(homedir)
+               {
+                       dpsnprintf(userdir, sizeof(userdir), "%s/My Documents/My Games/%s/", homedir, gameuserdirname);
+                       Con_DPrintf("Obtained personal directory %s from environment\n", userdir);
+               }
+               else
+                       *userdir = 0; // just to make sure it hasn't been written to by SHGetFolderPath returning failure
+       }
+
+       if(!*userdir)
+               Con_DPrintf("Could not obtain home directory; not supporting -mygames\n");
 #else
        homedir = getenv ("HOME");
        if(homedir)
                dpsnprintf(userdir, sizeof(userdir), "%s/.%s/", homedir, gameuserdirname);
+
+       if(!*userdir)
+               Con_DPrintf("Could not obtain home directory; assuming -nohome\n");
 #endif
 
+
 #ifdef WIN32
        if(!COM_CheckParm("-mygames"))
        {
@@ -1341,6 +1371,16 @@ void FS_Init (void)
 {
        int i;
 
+#ifdef WIN32
+       const char* dllnames [] =
+       {
+               "shfolder.dll",  // IE 4, or Win NT and higher
+               NULL
+       };
+       Sys_LoadLibrary(dllnames, &shfolder_dll, shfolderfuncs);
+       // don't care for the result; if it fails, %USERPROFILE% will be used instead
+#endif
+
        fs_mempool = Mem_AllocPool("file management", 0, NULL);
 
        strlcpy(fs_gamedir, "", sizeof(fs_gamedir));
@@ -1438,6 +1478,10 @@ void FS_Shutdown (void)
        //  by the OS anyway)
        FS_ClearSearchPath();
        Mem_FreePool (&fs_mempool);
+
+#ifdef WIN32
+       Sys_UnloadLibrary (&shfolder_dll);
+#endif
 }
 
 /*