From 097bde4691585c73d80f28568b75c66e1a74dc4d Mon Sep 17 00:00:00 2001
From: Alistair Leslie-Hughes <leslie_alistair@hotmail.com>
Date: Wed, 27 Oct 2021 17:17:54 +1100
Subject: [PATCH] msdasql: Add IPersist interface support.

Signed-off-by: Alistair Leslie-Hughes <leslie_alistair@hotmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
---
 dlls/msdasql/msdasql_main.c   | 50 +++++++++++++++++++++++++++++++++++
 dlls/msdasql/tests/provider.c | 27 +++++++++++++++++++
 2 files changed, 77 insertions(+)

diff --git a/dlls/msdasql/msdasql_main.c b/dlls/msdasql/msdasql_main.c
index 58fc8e378e0..79feacb83aa 100644
--- a/dlls/msdasql/msdasql_main.c
+++ b/dlls/msdasql/msdasql_main.c
@@ -176,6 +176,7 @@ struct msdasql
     IDBProperties    IDBProperties_iface;
     IDBInitialize    IDBInitialize_iface;
     IDBCreateSession IDBCreateSession_iface;
+    IPersist         IPersist_iface;
 
     LONG     ref;
 };
@@ -200,6 +201,11 @@ static inline struct msdasql *impl_from_IDBCreateSession(IDBCreateSession *iface
     return CONTAINING_RECORD(iface, struct msdasql, IDBCreateSession_iface);
 }
 
+static inline struct msdasql *impl_from_IPersist( IPersist *iface )
+{
+    return CONTAINING_RECORD( iface, struct msdasql, IPersist_iface );
+}
+
 static HRESULT WINAPI msdsql_QueryInterface(IUnknown *iface, REFIID riid, void **out)
 {
     struct msdasql *provider = impl_from_IUnknown(iface);
@@ -223,6 +229,10 @@ static HRESULT WINAPI msdsql_QueryInterface(IUnknown *iface, REFIID riid, void *
     {
         *out = &provider->IDBCreateSession_iface;
     }
+    else if(IsEqualGUID(&IID_IPersist, riid))
+    {
+        *out = &provider->IPersist_iface;
+    }
     else
     {
         FIXME("(%s, %p)\n", debugstr_guid(riid), out);
@@ -455,6 +465,45 @@ static const struct IDBCreateSessionVtbl dbsess_vtbl =
     dbsess_CreateSession
 };
 
+static HRESULT WINAPI persist_QueryInterface(IPersist *iface, REFIID riid, void **ppv)
+{
+    struct msdasql *provider = impl_from_IPersist( iface );
+    return IUnknown_QueryInterface(&provider->MSDASQL_iface, riid, ppv);
+}
+
+static ULONG WINAPI persist_AddRef(IPersist *iface)
+{
+    struct msdasql *provider = impl_from_IPersist( iface );
+    return IUnknown_AddRef(&provider->MSDASQL_iface);
+}
+
+static ULONG WINAPI persist_Release(IPersist *iface)
+{
+    struct msdasql *provider = impl_from_IPersist( iface );
+    return IUnknown_Release(&provider->MSDASQL_iface);
+}
+
+static HRESULT WINAPI persist_GetClassID(IPersist *iface, CLSID *classid)
+{
+    struct msdasql *provider = impl_from_IPersist( iface );
+
+    TRACE("(%p)->(%p)\n", provider, classid);
+
+    if(!classid)
+        return E_INVALIDARG;
+
+    *classid = CLSID_MSDASQL;
+    return S_OK;
+
+}
+
+static const IPersistVtbl persistVtbl = {
+    persist_QueryInterface,
+    persist_AddRef,
+    persist_Release,
+    persist_GetClassID
+};
+
 static HRESULT create_msdasql_provider(REFIID riid, void **ppv)
 {
     struct msdasql *provider;
@@ -468,6 +517,7 @@ static HRESULT create_msdasql_provider(REFIID riid, void **ppv)
     provider->IDBProperties_iface.lpVtbl = &dbprops_vtbl;
     provider->IDBInitialize_iface.lpVtbl = &dbinit_vtbl;
     provider->IDBCreateSession_iface.lpVtbl = &dbsess_vtbl;
+    provider->IPersist_iface.lpVtbl = &persistVtbl;
     provider->ref = 1;
 
     hr = IUnknown_QueryInterface(&provider->MSDASQL_iface, riid, ppv);
diff --git a/dlls/msdasql/tests/provider.c b/dlls/msdasql/tests/provider.c
index 2e90d2f848d..4cab6a24daf 100644
--- a/dlls/msdasql/tests/provider.c
+++ b/dlls/msdasql/tests/provider.c
@@ -38,6 +38,32 @@ static char mdbpath[MAX_PATH];
 
 static const VARTYPE intptr_vartype = (sizeof(void *) == 8 ? VT_I8 : VT_I4);
 
+static void test_msdasql(void)
+{
+    HRESULT hr;
+    IUnknown *unk;
+    IPersist *persist;
+    CLSID classid;
+
+    hr = CoCreateInstance( &CLSID_MSDASQL, NULL, CLSCTX_ALL, &IID_IUnknown, (void **)&unk);
+    ok(hr == S_OK, "Failed to create object 0x%08x\n", hr);
+    if (FAILED(hr))
+    {
+        return;
+    }
+
+    hr = IUnknown_QueryInterface(unk, &IID_IPersist, (void**)&persist);
+    ok(hr == S_OK, "got 0x%08x\n", hr);
+
+    hr = IPersist_GetClassID(persist, &classid);
+    ok(hr == S_OK, "got 0x%08x\n", hr);
+    ok(IsEqualGUID(&classid, &CLSID_MSDASQL), "got %s\n", debugstr_guid(&classid));
+
+    IPersist_Release(persist);
+
+    IUnknown_Release(unk);
+}
+
 static void test_Properties(void)
 {
     HRESULT hr;
@@ -275,6 +301,7 @@ START_TEST(provider)
 
     setup_database();
 
+    test_msdasql();
     test_Properties();
     test_sessions();