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/* vim: set sw=4 sts=4 et foldmethod=syntax : */
/*
* Copyright (c) 2006 Ciaran McCreesh <ciaranm@gentoo.org>
*
* This file is part of the Paludis package manager. Paludis is free software;
* you can redistribute it and/or modify it under the terms of the GNU General
* Public License version 2, as published by the Free Software Foundation.
*
* Paludis 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
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef PALUDIS_GUARD_PALUDIS_LOG_HH
#define PALUDIS_GUARD_PALUDIS_LOG_HH 1
#include <iosfwd>
#include <paludis/util/instantiation_policy.hh>
#include <paludis/util/private_implementation_pattern.hh>
namespace paludis
{
/**
* Specifies the level of a log message.
*
* Keep this in order. When deciding whether to display a message, Log
* uses message log level >= current log level, so it's important that
* least critical levels have lower numeric values.
*
* When modifying this, you will probably also want to take a look at
* ebuild/echo_functions.bash and the command_line source files.
*/
enum LogLevel
{
ll_debug, ///< Debug message
ll_qa, ///< QA messages
ll_warning, ///< Warning message
ll_silent, ///< Silent (for set_log_level)
last_ll, ///< Number of items
initial_ll = ll_debug ///< Initial value
};
/**
* Singleton class that handles log messages.
*/
class Log :
public InstantiationPolicy<Log, instantiation_method::SingletonAsNeededTag>,
private PrivateImplementationPattern<Log>
{
friend class InstantiationPolicy<Log, instantiation_method::SingletonAsNeededTag>;
private:
Log();
public:
/**
* Destructor, to be called only by our InstantiationPolicy.
*/
~Log();
/**
* Only display messages of at least this level.
*/
void set_log_level(const LogLevel);
/**
* Fetch the current log level.
*/
LogLevel log_level() const;
/**
* Log a message at the specified level.
*/
void message(const LogLevel, const std::string &);
/**
* Change the log stream.
*/
void set_log_stream(std::ostream * const);
};
}
#endif
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