MsiUseFeature utility added

(closes #3)

MsiUseFeature/Main.cpp

@@ -0,0 +1,69 @@
+/*
+    Copyright 2015-2016 Amebis
+    Copyright 2016 GÉANT
+
+    This file is part of GÉANTLink.
+
+    GÉANTLink is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    GÉANTLink is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with GÉANTLink. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "StdAfx.h"
+
+#pragma comment(lib, "Msi.lib")
+
+using namespace std;
+using namespace winstd;
+
+
+static int MsiUseFeature()
+{
+    int nArgs;
+    unique_ptr<LPWSTR[], LocalFree_delete<LPWSTR[]> > pwcArglist(CommandLineToArgvW(GetCommandLineW(), &nArgs));
+    if (pwcArglist == NULL) {
+        OutputDebugStr(_T("CommandLineToArgvW failed (error %u).\n"), GetLastError());
+        return 1;
+    }
+
+    if (nArgs < 2) {
+        OutputDebugStr(_T("Not enough parameters.\n"));
+        return -1;
+    }
+
+    // Query the feature state.
+    if (MsiQueryFeatureStateW(_L(PRODUCT_VERSION_GUID), pwcArglist[1]) == INSTALLSTATE_UNKNOWN) {
+        OutputDebugStr(_T("The product is not installed or feature state is unknown.\n"));
+        return 1;
+    }
+
+    // Perform the Microsoft Installer's feature completeness check.
+    if (MsiUseFeatureW(_L(PRODUCT_VERSION_GUID), pwcArglist[1]) != INSTALLSTATE_LOCAL) {
+        OutputDebugStr(_T("The feature is not installed locally.\n"));
+        return 2;
+    }
+
+    return 0;
+}
+
+
+int CALLBACK WinMain(_In_ HINSTANCE hInstance, _In_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nCmdShow)
+{
+    UNREFERENCED_PARAMETER(hInstance);
+    UNREFERENCED_PARAMETER(hPrevInstance);
+    UNREFERENCED_PARAMETER(lpCmdLine);
+    UNREFERENCED_PARAMETER(nCmdShow);
+
+    int res = MsiUseFeature();
+    assert(!_CrtDumpMemoryLeaks());
+    return res;
+}