oledb32: Implement DataConvert Variant->R8.

dlls/oledb32/convert.c

@@ -361,6 +361,11 @@ static HRESULT WINAPI convert_DataConvert(IDataConvert* iface,
         case DBTYPE_BSTR:        hr = VarR8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
         case DBTYPE_BOOL:        hr = VarR8FromBool(*(VARIANT_BOOL*)src, d);     break;
         case DBTYPE_DECIMAL:     hr = VarR8FromDec((DECIMAL*)src, d);            break;
+        case DBTYPE_VARIANT:
+            VariantInit(&tmp);
+            if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_R8)) == S_OK)
+                *d = V_R8(&tmp);
+            break;
         default: FIXME("Unimplemented conversion %04x -> R8\n", src_type); return E_NOTIMPL;
         }
         break;

dlls/oledb32/tests/convert.c

@@ -2276,6 +2276,59 @@ static void test_converttor4(void)
     ok(dst == 10.0, "got %f\n", dst);
 }
 
+static void test_converttor8(void)
+{
+    HRESULT hr;
+    DOUBLE dst;
+    BYTE src[20];
+    DBSTATUS dst_status;
+    DBLENGTH dst_len;
+    VARIANT var;
+
+    dst = 1.0;
+    dst_len = 0x1234;
+    hr = IDataConvert_DataConvert(convert, DBTYPE_EMPTY, DBTYPE_R8, 0, &dst_len, src, &dst, sizeof(dst), 0, &dst_status, 0, 0, 0);
+    ok(hr == S_OK, "got %08x\n", hr);
+    ok(dst_status == DBSTATUS_S_OK, "got %08x\n", dst_status);
+    ok(dst_len == sizeof(dst), "got %ld\n", dst_len);
+    ok(dst == 0.0, "got %f\n", dst);
+
+    dst = 1.0;
+    dst_len = 0x1234;
+    hr = IDataConvert_DataConvert(convert, DBTYPE_NULL, DBTYPE_R8, 0, &dst_len, src, &dst, sizeof(dst), 0, &dst_status, 0, 0, 0);
+    ok(hr == DB_E_UNSUPPORTEDCONVERSION, "got %08x\n", hr);
+    ok(dst_status == DBSTATUS_E_BADACCESSOR, "got %08x\n", dst_status);
+    ok(dst_len == 0x1234, "got %ld\n", dst_len);
+    ok(dst == 1.0, "got %f\n", dst);
+
+    dst = 1.0;
+    *(signed int*)src = 12345678;
+    dst_len = 0x1234;
+    hr = IDataConvert_DataConvert(convert, DBTYPE_I4, DBTYPE_R8, 0, &dst_len, src, &dst, sizeof(dst), 0, &dst_status, 0, 0, 0);
+    ok(hr == S_OK, "got %08x\n", hr);
+    ok(dst_status == DBSTATUS_S_OK, "got %08x\n", dst_status);
+    ok(dst_len == sizeof(dst), "got %ld\n", dst_len);
+    ok(dst == 12345678.0, "got %f\n", dst);
+
+    dst = 1.0;
+    *(FLOAT *)src = 10.0;
+    dst_len = 0x1234;
+    hr = IDataConvert_DataConvert(convert, DBTYPE_R4, DBTYPE_R8, 0, &dst_len, src, &dst, sizeof(dst), 0, &dst_status, 0, 0, 0);
+    ok(hr == S_OK, "got %08x\n", hr);
+    ok(dst_status == DBSTATUS_S_OK, "got %08x\n", dst_status);
+    ok(dst_len == sizeof(dst), "got %ld\n", dst_len);
+    ok(dst == 10.0, "got %f\n", dst);
+
+    dst_len = dst = 0x1234;
+    V_VT(&var) = VT_I2;
+    V_I2(&var) = 0x4321;
+    hr = IDataConvert_DataConvert(convert, DBTYPE_VARIANT, DBTYPE_R8, 0, &dst_len, &var, &dst, sizeof(dst), 0, &dst_status, 0, 0, 0);
+    ok(hr == S_OK, "got %08x\n", hr);
+    ok(dst_status == DBSTATUS_S_OK, "got %08x\n", dst_status);
+    ok(dst_len == sizeof(dst), "got %ld\n", dst_len);
+    ok(dst == 0x4321, "got %f\n", dst);
+}
+
 static void test_converttocy(void)
 {
     HRESULT hr;
@@ -2862,6 +2915,7 @@ START_TEST(convert)
     test_converttoui1();
     test_converttoui4();
     test_converttor4();
+    test_converttor8();
     test_converttofiletime();
     test_converttocy();
     test_converttoui8();