[PATCH] oledb32: GetConversionSize shouldn't fail for null variants. (try 3)
Alistair Leslie-Hughes
leslie_alistair at hotmail.com
Wed Dec 23 00:47:48 CST 2015
If we have a NULL variant which will be converted to a non-fixed
sized type (DBTYPE_WSTR) then we just return S_OK.
Signed-off-by: Alistair Leslie-Hughes <leslie_alistair at hotmail.com>
---
dlls/oledb32/convert.c | 3 +++
dlls/oledb32/tests/convert.c | 39 ++++++++++++++++++++++++++++++++++++---
2 files changed, 39 insertions(+), 3 deletions(-)
diff --git a/dlls/oledb32/convert.c b/dlls/oledb32/convert.c
index 891b31c..0a1518d 100644
--- a/dlls/oledb32/convert.c
+++ b/dlls/oledb32/convert.c
@@ -1344,6 +1344,9 @@ static HRESULT WINAPI convert_GetConversionSize(IDataConvert* iface,
if ((*dst_len = get_length(dst_type)))
return S_OK;
+ if(src_type == DBTYPE_VARIANT && V_VT((VARIANT*)src) == VT_NULL)
+ return S_OK;
+
switch (dst_type)
{
case DBTYPE_STR:
diff --git a/dlls/oledb32/tests/convert.c b/dlls/oledb32/tests/convert.c
index a785457..46719b1 100644
--- a/dlls/oledb32/tests/convert.c
+++ b/dlls/oledb32/tests/convert.c
@@ -2631,16 +2631,25 @@ static void test_getconversionsize(void)
src_len = 20;
V_VT(&var) = VT_BSTR;
V_BSTR(&var) = SysAllocString(strW);
- hr = IDataConvert_GetConversionSize(convert, DBTYPE_VARIANT, DBTYPE_BYTES, &src_len, &dst_len, &var);
+ hr = IDataConvert_GetConversionSize(convert, DBTYPE_VARIANT, DBTYPE_STR, &src_len, &dst_len, &var);
+ ok(hr == S_OK, "got 0x%08x\n", hr);
+ ok(dst_len == 5, "%ld\n", dst_len);
+ VariantClear(&var);
+
+ src_len = 20;
+ V_VT(&var) = VT_I4;
+ V_I4(&var) = 4;
+ hr = IDataConvert_GetConversionSize(convert, DBTYPE_VARIANT, DBTYPE_STR, &src_len, &dst_len, &var);
ok(hr == S_OK, "got 0x%08x\n", hr);
- ok(dst_len == 2, "%ld\n", dst_len);
VariantClear(&var);
dst_len = 0;
src_len = 20;
- V_VT(&var) = VT_NULL;
+ V_VT(&var) = VT_BSTR;
+ V_BSTR(&var) = SysAllocString(strW);
hr = IDataConvert_GetConversionSize(convert, DBTYPE_VARIANT, DBTYPE_BYTES, &src_len, &dst_len, &var);
ok(hr == S_OK, "got 0x%08x\n", hr);
+ ok(dst_len == 2, "%ld\n", dst_len);
VariantClear(&var);
dst_len = 0;
@@ -2655,6 +2664,30 @@ static void test_getconversionsize(void)
ok(hr == S_OK, "got 0x%08x\n", hr);
ok(dst_len == 1802, "%ld\n", dst_len);
VariantClear(&var);
+
+ /* On Windows, NULL variants being convert to a non-fixed sized type will return a dst_len of
+ * 110 but we aren't testing for this value.
+ */
+ dst_len = 32;
+ V_VT(&var) = VT_NULL;
+ hr = IDataConvert_GetConversionSize(convert, DBTYPE_VARIANT, DBTYPE_I4, NULL, &dst_len, &var);
+ ok(dst_len == 4, "%ld\n", dst_len);
+ ok(hr == S_OK, "got 0x%08x\n", hr);
+
+ V_VT(&var) = VT_NULL;
+ hr = IDataConvert_GetConversionSize(convert, DBTYPE_VARIANT, DBTYPE_STR, NULL, &dst_len, &var);
+ ok(hr == S_OK, "got 0x%08x\n", hr);
+
+ V_VT(&var) = VT_NULL;
+ hr = IDataConvert_GetConversionSize(convert, DBTYPE_VARIANT, DBTYPE_WSTR, NULL, &dst_len, &var);
+ ok(hr == S_OK, "got 0x%08x\n", hr);
+
+ src_len = 20;
+ V_VT(&var) = VT_NULL;
+ hr = IDataConvert_GetConversionSize(convert, DBTYPE_VARIANT, DBTYPE_BYTES, &src_len, &dst_len, &var);
+ ok(hr == S_OK, "got 0x%08x\n", hr);
+ VariantClear(&var);
+
}
static void test_converttobytes(void)
--
1.9.1
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