* ext/win32ole/win32ole.c(ole_invoke): retry after converting Qnil

  to VT_EMPTY.

* ext/win32ole/win32ole/tests/testWIN32OLE.rb: correct error
  message string "Unknown" => "unknown".


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@8295 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 42 insertions, 4 deletions

diff --git a/ext/win32ole/tests/testWIN32OLE.rb b/ext/win32ole/tests/testWIN32OLE.rb
index d8c3b6e6ba..3603475d22 100644
--- a/ext/win32ole/tests/testWIN32OLE.rb
+++ b/ext/win32ole/tests/testWIN32OLE.rb
@@ -40,7 +40,7 @@ class TestWin32OLE < RUNIT::TestCase
     exc = assert_exception(WIN32OLERuntimeError) {
       WIN32OLE.new("{000}")
     }
-    assert_match(/Unknown OLE server: `\{000\}'/, exc.message)
+    assert_match(/unknown OLE server: `\{000\}'/, exc.message)
   end
   def test_s_connect
     excel2 = WIN32OLE.connect('Excel.Application')
diff --git a/ext/win32ole/win32ole.c b/ext/win32ole/win32ole.c
index 5f07799785..a652c54915 100644
--- a/ext/win32ole/win32ole.c
+++ b/ext/win32ole/win32ole.c
@@ -78,7 +78,7 @@
 
 #define WC2VSTR(x) ole_wc2vstr((x), TRUE)
 
-#define WIN32OLE_VERSION "0.5.9"
+#define WIN32OLE_VERSION "0.6.0"
 
 typedef HRESULT (STDAPICALLTYPE FNCOCREATEINSTANCEEX)
     (REFCLSID, IUnknown*, DWORD, COSERVERINFO*, DWORD, MULTI_QI*);
@@ -154,6 +154,8 @@ static FNCOCREATEINSTANCEEX *gCoCreateInstanceEx = NULL;
 static VALUE com_hash;
 static IDispatchVtbl com_vtbl;
 
+static VARTYPE g_nil_to = VT_ERROR;
+
 struct oledata {
     IDispatch *pDispatch;
 };
@@ -831,8 +833,12 @@ ole_val2variant(val, var)
         V_BOOL(var) = VARIANT_FALSE;
         break;
     case T_NIL:
-        V_VT(var) = VT_ERROR;
-        V_ERROR(var) = DISP_E_PARAMNOTFOUND;
+        if (g_nil_to == VT_ERROR) {
+            V_VT(var) = VT_ERROR;
+            V_ERROR(var) = DISP_E_PARAMNOTFOUND;
+        }else {
+            V_VT(var) = VT_EMPTY;
+        }
         break;
     default:
         V_VT(var) = VT_DISPATCH;
@@ -841,6 +847,16 @@ ole_val2variant(val, var)
     }
 }
 
+static void
+ole_val2variant2(val, var)
+    VALUE val;
+    VARIANT *var;
+{
+    g_nil_to = VT_EMPTY;
+    ole_val2variant(val, var);
+    g_nil_to = VT_ERROR;
+}
+
 static VALUE
 ole_set_member(self, dispatch)
     VALUE self;
@@ -1087,6 +1103,7 @@ ole_variant2val(pvar)
     return obj;
 }
 
+
 static LONG reg_open_key(hkey, name, phkey)
     HKEY hkey;
     const char *name;
@@ -1986,6 +2003,27 @@ ole_invoke(argc, argv, self, wFlags)
                 VariantClear(&op.dp.rgvarg[n]);
             }
         }
+        if (FAILED(hr)) {
+            /* retry after converting nil to VT_EMPTY */
+            if (op.dp.cArgs > cNamedArgs) {
+                for(i = cNamedArgs; i < op.dp.cArgs; i++) {
+                    n = op.dp.cArgs - i + cNamedArgs - 1;
+                    param = rb_ary_entry(paramS, i-cNamedArgs);
+                    ole_val2variant2(param, &op.dp.rgvarg[n]);
+                }
+                memset(&excepinfo, 0, sizeof(EXCEPINFO));
+                VariantInit(&result);
+                hr = pole->pDispatch->lpVtbl->Invoke(pole->pDispatch, DispID, 
+                        &IID_NULL, lcid, wFlags,
+                        &op.dp, &result,
+                        &excepinfo, &argErr);
+                for(i = cNamedArgs; i < op.dp.cArgs; i++) {
+                    n = op.dp.cArgs - i + cNamedArgs - 1;
+                    VariantClear(&op.dp.rgvarg[n]);
+                }
+            }
+        }
+
         /* mega kludge. if a method in WORD is called and we ask
          * for a result when one is not returned then
          * hResult == DISP_E_EXCEPTION. this only happens on