include/nutconf.hpp, common/nutconf.cpp: introduce GenericConfigurati…

…on::getFlag() and setFlag() methods [networkupstools#2294]

Signed-off-by: Jim Klimov <[email protected]>

common/nutconf.cpp

@@ -1025,6 +1025,32 @@ void GenericConfiguration::setStr(
 }
 
 
+bool GenericConfiguration::getFlag(
+		const std::string & section,
+		const std::string & entry) const
+{
+	ConfigParamList params;
+
+	if (!get(section, entry, params))
+		return false;
+
+	// Flag - if exists then "true"
+	return true;
+}
+
+
+void GenericConfiguration::setFlag(
+		const std::string & section,
+		const std::string & entry)
+{
+	ConfigParamList param;
+
+	param.push_back("true");
+
+	set(section, entry, param);
+}
+
+
 long long int GenericConfiguration::getInt(
 		const std::string & section,
 		const std::string & entry,

include/nutconf.hpp

@@ -907,6 +907,63 @@ class GenericConfiguration : public BaseConfiguration, public Serialisable
 		setStr("", entry, value);
 	}
 
+	/**
+	 *  \brief  Configuration flag getter
+	 *
+	 *  False is returned if the section or entry doesn't exist.
+	 *  If a flag exists in configuration (any value is ignored),
+	 *  it is effectively True.
+	 *
+	 *  \param  section  Section name
+	 *  \param  entry    Entry name
+	 *
+	 *  \return Configuration parameter as boolean
+	 */
+	bool getFlag(
+		const std::string & section,
+		const std::string & entry) const;
+
+	/**
+	 *  \brief  Global scope configuration flag getter
+	 *
+	 *  False is returned if the entry doesn't exist.
+	 *  If a flag exists in configuration (any value is ignored),
+	 *  it is effectively True.
+	 *
+	 *  \param  entry  Entry name
+	 *
+	 *  \return Configuration parameter as boolean
+	 */
+	inline bool getFlag(const std::string & entry) const
+	{
+		return getFlag("", entry);
+	}
+
+	/**
+	 *  \brief  Configuration flag setter (mentioned == true)
+	 *
+	 *  Note: to unset a flag, just use remove() method.
+	 *
+	 *  \param  section  Section name
+	 *  \param  entry    Entry name
+	 */
+	void setFlag(
+		const std::string & section,
+		const std::string & entry);
+
+	/**
+	 *  \brief  Global scope configuration flag setter (mentioned == true)
+	 *
+	 *  Note: to unset a flag, just use remove() method.
+	 *
+	 *  \param  entry    Entry name
+	 */
+	inline void setFlag(
+		const std::string & entry)
+	{
+		setFlag("", entry);
+	}
+
 	/**
 	 *  \brief  Configuration number getter
 	 *