Added list of databases and roles.

Roles works for atleast 9.3 and up.

Reorganizing code for communicating with database.

src/Pgsql_Value.cpp

@@ -0,0 +1,56 @@
+#include "Pgsql_Value.h"
+#include <cstdlib>
+#include <cstring>
+
+using namespace Pgsql;
+
+Value::Value(const char *val, Oid typ)
+	: m_val(val), m_typ(typ)
+{}
+
+QString Value::asQString() const
+{
+	return QString::fromUtf8(m_val);
+}
+
+Value::operator QString() const
+{
+	return QString::fromUtf8(m_val);
+}
+
+Value::operator QDateTime() const
+{
+	return QDateTime::fromString(asQString(),
+		"yyyy-MM-dd hh:mm:ss");
+}
+
+Value::operator std::string() const
+{
+	return m_val;
+}
+
+Value::operator short() const
+{
+	return (short)std::atoi(m_val);
+}
+
+Value::operator int() const
+{
+	return std::atoi(m_val);
+}
+
+Value::operator Oid() const
+{
+	return operator int();
+}
+
+Value::operator __int64() const
+{
+	return std::strtoull(m_val, nullptr, 10);
+}
+
+Value::operator bool() const
+{
+	return std::strcmp(m_val, "t") == 0;
+}
+