Nikolay Sivov : propsys: Partially implement VariantToString().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: f7ef02bd8f74ea052d61e48cd84b226d8a5867a8
URL:    https://gitlab.winehq.org/wine/wine/-/commit/f7ef02bd8f74ea052d61e48cd84b226...

Author: Nikolay Sivov <nsivov(a)codeweavers.com>
Date:   Tue Oct  3 18:41:11 2023 +0200

propsys: Partially implement VariantToString().

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55708
Signed-off-by: Nikolay Sivov <nsivov(a)codeweavers.com>

---

 dlls/propsys/propsys.spec    |  2 +-
 dlls/propsys/propvar.c       | 32 ++++++++++++++++++++++++++++++++
 dlls/propsys/tests/propsys.c | 30 ++++++++++++++++++++++++++++++
 include/propvarutil.h        |  1 +
 4 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/dlls/propsys/propsys.spec b/dlls/propsys/propsys.spec
index cf7a4c299f4..b2d48a87577 100644
--- a/dlls/propsys/propsys.spec
+++ b/dlls/propsys/propsys.spec
@@ -190,7 +190,7 @@
 @ stub VariantToInt64WithDefault
 @ stub VariantToPropVariant
 @ stub VariantToStrRet
-@ stub VariantToString
+@ stdcall VariantToString(ptr ptr long)
 @ stub VariantToStringAlloc
 @ stub VariantToStringArray
 @ stub VariantToStringArrayAlloc
diff --git a/dlls/propsys/propvar.c b/dlls/propsys/propvar.c
index c170f82c598..bf77e7d51e5 100644
--- a/dlls/propsys/propvar.c
+++ b/dlls/propsys/propvar.c
@@ -431,6 +431,38 @@ PCWSTR WINAPI VariantToStringWithDefault(const VARIANT *pvar, const WCHAR *defau
     return default_value;
 }
 
+/******************************************************************
+ *  VariantToString   (PROPSYS.@)
+ */
+HRESULT WINAPI VariantToString(REFVARIANT var, PWSTR ret, UINT cch)
+{
+    WCHAR *str = NULL;
+
+    TRACE("%p, %p, %u.\n", var, ret, cch);
+
+    *ret = 0;
+
+    if (!cch)
+        return E_INVALIDARG;
+
+    if (V_VT(var) == VT_BSTR)
+    {
+        str = V_BSTR(var);
+    }
+    else
+    {
+        FIXME("Unsupported type %d.\n", V_VT(var));
+
+        return E_NOTIMPL;
+    }
+
+    if (wcslen(str) > cch - 1)
+        return STRSAFE_E_INSUFFICIENT_BUFFER;
+    wcscpy(ret, str);
+
+    return S_OK;
+}
+
 /******************************************************************
  *  PropVariantChangeType   (PROPSYS.@)
  */
diff --git a/dlls/propsys/tests/propsys.c b/dlls/propsys/tests/propsys.c
index 2d683a3bdf5..dab0537991b 100644
--- a/dlls/propsys/tests/propsys.c
+++ b/dlls/propsys/tests/propsys.c
@@ -2277,6 +2277,35 @@ static void test_VariantToStringWithDefault(void)
     SysFreeString(b);
 }
 
+static void test_VariantToString(void)
+{
+    HRESULT hr;
+    VARIANT v;
+    WCHAR buff[64];
+
+    buff[0] = 1;
+    V_VT(&v) = VT_EMPTY;
+    hr = VariantToString(&v, buff, 64);
+    todo_wine
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+    ok(!buff[0], "Unexpected buffer.\n");
+
+    V_VT(&v) = VT_BSTR;
+    V_BSTR(&v) = SysAllocString(L"test1");
+
+    buff[0] = 1;
+    hr = VariantToString(&v, buff, 0);
+    ok(hr == E_INVALIDARG, "Unexpected hr %#lx.\n", hr);
+    ok(!buff[0], "Unexpected buffer.\n");
+
+    hr = VariantToString(&v, buff, 5);
+    ok(hr == STRSAFE_E_INSUFFICIENT_BUFFER, "Unexpected hr %#lx.\n", hr);
+    hr = VariantToString(&v, buff, 6);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+    ok(!wcscmp(buff, L"test1"), "Unexpected string.\n");
+    VariantClear(&v);
+}
+
 START_TEST(propsys)
 {
     test_InitPropVariantFromGUIDAsString();
@@ -2304,4 +2333,5 @@ START_TEST(propsys)
     test_propertystore();
     test_PSCreatePropertyStoreFromObject();
     test_VariantToStringWithDefault();
+    test_VariantToString();
 }
diff --git a/include/propvarutil.h b/include/propvarutil.h
index 575c498b230..6c1878c6aa5 100644
--- a/include/propvarutil.h
+++ b/include/propvarutil.h
@@ -95,6 +95,7 @@ HRESULT WINAPI PropVariantToBuffer(REFPROPVARIANT propvarIn, void *ret, UINT cb)
 HRESULT WINAPI PropVariantToString(REFPROPVARIANT propvarIn, PWSTR ret, UINT cch);
 PCWSTR WINAPI PropVariantToStringWithDefault(REFPROPVARIANT propvarIn, LPCWSTR pszDefault);
 PCWSTR WINAPI VariantToStringWithDefault(const VARIANT *pvar, LPCWSTR pszDefault);
+HRESULT WINAPI VariantToString(REFVARIANT var, PWSTR ret, UINT cch);
 
 HRESULT WINAPI PropVariantToStringAlloc(REFPROPVARIANT propvarIn, WCHAR **ret);