Custom action library, initial version

installer/src/installer-lib/database.h

+/**
+ * \file database.h MSI database
+ */
+
+#ifndef DATABASE_H
+#define DATABASE_H
+
+#include <string>
+#include "windows.h"
+#include "msi.h"
+
+#include "session.h"
+
+/**
+ * A Windows Installer database as contained in an MSI file.
+ *
+ * The API for MSI databases is shared between installation and non-installation contexts.
+ * Roughly speaking, outside an installation the database supports both read and write,
+ *   but inside an installation the database is read-only.
+ * The life cycle functions are not shared, in addition.
+ * Outside of these restrictions, however, the API is mostly common.
+ * This class is the base class for the common API.
+ * Subclasses provide public constructors and provide access to API calls not in common.
+ */
+class Database
+{
+protected:
+  /**
+   * Protected constructor. Life cycle depends strongly on context.
+   */
+  Database( MSIHANDLE handle );
+
+  /**
+   * Destructor.
+   */
+  ~Database();
+
+protected:
+  /**
+   */
+  MSIHANDLE handle;
+
+private:
+  /**
+   * Private copy constructor is declared but not defined.
+   */
+  Database( const Database & );
+
+  /**
+   * Private assignment operator is declared but not defined.
+   */
+  Database & operator=( const Database & ) ;
+};
+
+/**
+ * A Windows Installer database in an installation context.
+ */
+class Installation_Database : public Database
+{
+public:
+  /**
+   * The constructor of a database in an installation context has no arguments because the database is a part of that context.
+   */
+  Installation_Database( Immediate_Session & session );
+};
+
+/**
+ * A Windows Installer database in a non-installation context.
+ */
+class Non_Installation_Database : public Database
+{
+};
+
+#endif