LogFile.cpp

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/*
 * LogFile.cpp
 *
 * Part of Fly! Legacy project
 *
 * Copyright 2000-2004 Chris Wallace
 *
 * Fly! Legacy 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.
 *
 * Fly! Legacy 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 Fly! Legacy; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <sys/types.h>
#include <sys/timeb.h>
#include <time.h>
#include <string.h>
#include "../Include/LogFile.h"


//
// Constructor 
//
CLogFile::CLogFile (const char* filename, const char* mode)
{
  // Attempt to open log file
  f = fopen (filename, mode);
}


//
// Destructor
//
CLogFile::~CLogFile (void)
{
  // Close file handle
  if (f) {
    fclose (f);
    f = NULL;
  }
}

//
// Return file reference
//
FILE *CLogFile::GetFile (void)
{
  return f;
}

//
// Write timestamped output to the log file
//
void CLogFile::Write (const char* fmt, ...)
{
  if (f) {
    // Prefix format string with timestamp in fixed-length 26-byte format:
    //   <YYYY-MM-DD HH:MM:SS.MMMM  >
    int nChars = strlen(fmt) + 40;
    char *newfmt = new char[nChars];

    // Get local computer date/time
    struct timeb t;
    ftime (&t);
    struct tm* local = localtime (&t.time);
    if (local) {
      sprintf (newfmt, "%04d-%02d-%02d %02d:%02d:%02d.%03d  %s\n",
        1900 + local->tm_year, local->tm_mon+1, local->tm_mday,
        local->tm_hour, local->tm_min, local->tm_sec, t.millitm, fmt);
    } else {
      strcpy (newfmt, fmt);
    }

    va_list argp;
    va_start(argp, fmt);
    vfprintf(f, newfmt, argp);
    va_end(argp);
  
    delete newfmt;
  }
  fflush (f);
}

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