logger.cc

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#include "config.h"

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <iostream>
#include <string>
#include <fstream>

#include "asserts.h"
#include "error.h"
#include "timer.h"
#include "rconfig.h"
#include "estring.h"

#include "logger.h"

//-----------------------------------------------------------------------------

/** C'tor */
log_manager::log_manager()
{
        if (this != &logger)
                throw(
                        INTERNAL_ERROR(0,"Attempt to allocate multiple log managers")
                        );
        clear();
}

/** Clear the log manager */
void log_manager::clear(void)
{
        m_new_line = true;
        if (m_out.is_open())
                m_out.close();
        m_initialized = false;
}

/** Initialize the log manager */
void log_manager::init(void)
{
        std::string es;
        std::string filename;
        bool done = false;
        int count = 0;

        done = false;
        while (!done) {
                TRY_nomem(filename = config.log_dir());
                TRY_nomem(filename += "/");
                TRY_nomem(filename += config.timestamp().str());
                if (config.action() == configuration_manager::action_archive) {
                        TRY_nomem(filename += ".log");
                }
                else if (config.action() == configuration_manager::action_relink) {
                        TRY_nomem(filename += ".relink");
                }
                if (count != 0) {
                        TRY_nomem(filename += ".");
                        TRY_nomem(filename += estring(count));
                }
                if (exists(filename))
                        ++count;
                else
                        done = true;
        }
        m_out.open(filename.c_str());
        if (!m_out.is_open()) {
                TRY_nomem(es = "Could not open log file: \"");
                TRY_nomem(es += filename);
                TRY_nomem(es += "\"");
                throw(ERROR(errno,es));
        }

        m_initialized = true;
}

/** The initialized state of the log manager */
const bool log_manager::initialized(void) const
{
        return(m_initialized);
}

/** Write a string to the log file */
void log_manager::write(
        const std::string& a_str,
        const uint16 a_indention,
        const configuration_manager::logging_type a_logging_level,
        const pid_t a_pid
        )
{
        std::string::const_iterator csi;

        if (!initialized())
                throw(INTERNAL_ERROR(0,"Log manager is not initialized"));

        if (a_logging_level > config.logging_level())
                return;
        
        for (csi = a_str.begin(); csi != a_str.end(); ++csi) {
                if (m_new_line) {
                        m_out << stamp(a_pid, a_indention);
                        m_new_line = false;
                }
                m_out << *csi;
                if (*csi == '\n')
                        m_new_line = true;
        }
        m_out.flush();
}

//-----------------------------------------------------------------------------

/** The global log manager */
log_manager logger;

//-----------------------------------------------------------------------------

---