[project @ 2005-07-22 10:18:51 by simonmar]

[haskell-directory.git] / cbits / dirUtils.c

diff --git a/cbits/dirUtils.c b/cbits/dirUtils.c
index fdcdf29..1e981d3 100644 (file)
--- a/cbits/dirUtils.c
+++ b/cbits/dirUtils.c
@@ -172,3 +172,47 @@ __hscore_renameFile( HsAddr src,
 #endif
 }
 
+/*
+ * Function: __hscore_getFolderPath()
+ *
+ * Late-bound version of SHGetFolderPath(), coping with OS versions
+ * that have shell32's lacking that particular API.
+ *
+ */
+#if defined(mingw32_HOST_OS) || defined(__MINGW32__) || defined(_MSC_VER)
+typedef HRESULT (*HSCORE_GETAPPFOLDERFUNTY)(HWND,int,HANDLE,DWORD,char*);
+int
+__hscore_getFolderPath(HWND hwndOwner,
+                      int nFolder,
+                      HANDLE hToken,
+                      DWORD dwFlags,
+                      char*  pszPath)
+{
+    static int loaded_dll = 0;
+    static HMODULE hMod = (HMODULE)NULL;
+    static HSCORE_GETAPPFOLDERFUNTY funcPtr = NULL;
+    /* The DLLs to try loading entry point from */
+    char* dlls[] = { "shell32.dll", "shfolder.dll" };
+    
+    if (loaded_dll < 0) {
+       return (-1);
+    } else if (loaded_dll == 0) {
+       int i;
+       for(i=0;i < sizeof(dlls); i++) {
+           hMod = LoadLibrary(dlls[i]);
+           if ( hMod != NULL &&
+                (funcPtr = (HSCORE_GETAPPFOLDERFUNTY)GetProcAddress(hMod, "SHGetFolderPathA")) ) {
+               loaded_dll = 1;
+               break;
+           }
+       }
+       if (loaded_dll == 0) {
+           loaded_dll = (-1);
+           return (-1);
+       }
+    }
+    /* OK, if we got this far the function has been bound */
+    return (int)funcPtr(hwndOwner,nFolder,hToken,dwFlags,pszPath);
+    /* ToDo: unload the DLL on shutdown? */
+}
+#endif