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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// -=- LogWriter.h - The Log writer class.
#ifndef __RFB_LOG_WRITER_H__
#define __RFB_LOG_WRITER_H__
#include <stdarg.h>
#include <rfb/Logger.h>
#include <rfb/Configuration.h>
#ifdef __GNUC__
# define __printf_attr(a, b) __attribute__((__format__ (__printf__, a, b)))
#else
# define __printf_attr(a, b)
#endif // __GNUC__
// Each log writer instance has a unique textual name,
// and is attached to a particular Log instance and
// is assigned a particular log level.
#define DEF_LOGFUNCTION(name, level) \
inline void name(const char* fmt, ...) __printf_attr(2, 3) { \
if (m_log && (level <= m_level)) { \
va_list ap; va_start(ap, fmt); \
m_log->write(level, m_name, fmt, ap);\
va_end(ap); \
} \
}
namespace rfb {
class LogWriter;
class LogWriter {
public:
LogWriter(const char* name);
~LogWriter();
const char *getName() {return m_name;}
void setLog(Logger *logger);
void setLevel(int level);
int getLevel(void) { return m_level; }
inline void write(int level, const char* format, ...) __printf_attr(3, 4) {
if (m_log && (level <= m_level)) {
va_list ap;
va_start(ap, format);
m_log->write(level, m_name, format, ap);
va_end(ap);
}
}
DEF_LOGFUNCTION(error, 0)
DEF_LOGFUNCTION(status, 10)
DEF_LOGFUNCTION(info, 30)
DEF_LOGFUNCTION(debug, 100)
// -=- DIAGNOSTIC & HELPER ROUTINES
static void listLogWriters(int width=79);
// -=- CLASS FIELDS & FUNCTIONS
static LogWriter* log_writers;
static LogWriter* getLogWriter(const char* name);
static bool setLogParams(const char* params);
private:
const char* m_name;
int m_level;
Logger* m_log;
LogWriter* m_next;
};
class LogParameter : public StringParameter {
public:
LogParameter();
virtual bool setParam(const char* v);
// Call this to set a suitable default value.
// Can't use the normal default mechanism for
// this because there is no guarantee on C++
// constructor ordering - some LogWriters may
// not exist when LogParameter gets constructed.
// NB: The default value must exist for the
// lifetime of the process!
void setDefault(const char* v);
};
extern LogParameter logParams;
};
#endif // __RFB_LOG_WRITER_H__
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