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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15422 a592a061-630c-0410-9148-cb99ea01b6c8
115 lines
2.2 KiB
C++
115 lines
2.2 KiB
C++
// -*- C++ -*-
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/**
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* \file debugstream.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Lars Gullik Bjønnes
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef DEBUG_STREAM_HPP
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#define DEBUG_STREAM_HPP
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#include <iostream>
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#include <boost/version.hpp>
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//namespace lyx {
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#if BOOST_VERSION < 103300
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# include <boost/test/detail/nullstream.hpp>
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#else
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# include <boost/test/utils/nullstream.hpp>
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#endif
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#ifdef DEBUG
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# define TEMPORARY_DEBUG_MACRO DEBUG
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# undef DEBUG
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#endif
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struct debug_trait {
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enum type {
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NONE = 0,
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EMERG = 1,
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ALERT = 2,
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CRIT = 3,
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ERR = 4,
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WARN = 5,
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NOTICE = 6,
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INFO = 7,
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DEBUG = 8,
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ANY = 0xffffff
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};
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static bool match(type a, type b) {
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return (b <= a || (b == ANY && a > NONE));
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}
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};
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#ifdef TEMPORARY_DEBUG_MACRO
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# define DEBUG TEMPORARY_DEBUG_MACRO
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# undef TEMPORARY_DEBUG_MACRO
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#endif
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template <class dtrait,
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class charT = char,
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class traits = std::char_traits<charT> >
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class basic_debugstream : public std::basic_ostream<charT, traits> {
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public:
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typedef dtrait debug;
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typedef typename debug::type Type;
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basic_debugstream()
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: std::basic_ostream<charT, traits>(0), dt(debug::NONE)
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{}
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/// Constructor, sets the debug level to t.
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explicit basic_debugstream(std::basic_streambuf<charT, traits> * buf)
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: std::basic_ostream<charT, traits>(buf), dt(debug::NONE)
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{}
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/// Sets the debug level to t.
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void level(Type t) {
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dt = t;
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}
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/// Returns the current debug level.
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Type level() const {
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return dt;
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}
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/// Returns true if t is part of the current debug level.
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bool debugging(Type t = debug::ANY) const
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{
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if (debug::match(dt, t)) return true;
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return false;
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}
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/** Returns the no-op stream if t is not part of the
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current debug level otherwise the real debug stream
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is used.
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Use: dbgstream[Debug::INFO] << "Info!\n";
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*/
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std::basic_ostream<charT, traits> & operator[](Type t) {
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if (debug::match(dt, t))
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return *this;
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return nullstream;
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}
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private:
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/// The current debug level
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Type dt;
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/// The no-op stream.
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boost::basic_onullstream<charT, traits> nullstream;
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};
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typedef basic_debugstream<debug_trait> debugstream;
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//} // namespace lyx
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#endif
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