/* logging.c -	useful logging functions
 *	Copyright (C) 1998, 1999 Free Software Foundation, Inc.
 *
 * This file is part of GnuPG.
 *
 * GnuPG 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.
 *
 * GnuPG 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
 */


/* This file should replace logger.c in the future - for now it is not
 * used GnuPG.
 * It is a quite simple implemenation but sufficient for most purposes.
 */

#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>

#include "libutil-config.h"
#include "logging.h"

enum my_log_levels {
    MY_LOG_CONT,
    MY_LOG_INFO,
    MY_LOG_WARN,
    MY_LOG_ERROR,
    MY_LOG_FATAL,
    MY_LOG_BUG,
    MY_LOG_DEBUG
};


#if 0
static void
write2stderr( const char *s )
{
    write( 2, s, strlen(s) );
}


static void
do_die(int rc, const char *text )
{
    write2stderr("\nFatal error: ");
    write2stderr(text);
    write2stderr("\n");
    abort();
}
#endif


static void
do_logv( int level, const char *fmt, va_list arg_ptr )
{
    switch ( level ) {
      case MY_LOG_CONT: break;
      case MY_LOG_INFO: break;
      case MY_LOG_WARN: break;
      case MY_LOG_ERROR: break;
      case MY_LOG_FATAL: fputs("Fatal: ",stderr ); break;
      case MY_LOG_BUG: fputs("Ohhhh jeeee: ", stderr); break;
      case MY_LOG_DEBUG: fputs("DBG: ", stderr ); break;
      default: fprintf(stderr,"[Unknown log level %d]: ", level ); break;
    }
    vfprintf(stderr,fmt,arg_ptr) ;

    if( level == MY_LOG_FATAL )
	exit(2);
    if( level == MY_LOG_BUG )
	abort();
}

static void
do_log( int level, const char *fmt, ... )
{
    va_list arg_ptr ;

    va_start( arg_ptr, fmt ) ;
    do_logv( level, fmt, arg_ptr );
    va_end(arg_ptr);
}



void
log_info( const char *fmt, ... )
{
    va_list arg_ptr ;

    va_start( arg_ptr, fmt ) ;
    do_logv( MY_LOG_INFO, fmt, arg_ptr );
    va_end(arg_ptr);
}

void
log_error( const char *fmt, ... )
{
    va_list arg_ptr ;

    va_start( arg_ptr, fmt ) ;
    do_logv( MY_LOG_ERROR, fmt, arg_ptr );
    va_end(arg_ptr);
}


void
log_fatal( const char *fmt, ... )
{
    va_list arg_ptr ;

    va_start( arg_ptr, fmt ) ;
    do_logv( MY_LOG_FATAL, fmt, arg_ptr );
    va_end(arg_ptr);
    abort(); /* never called, bugs it makes the compiler happy */
}

void
log_bug( const char *fmt, ... )
{
    va_list arg_ptr ;

    va_start( arg_ptr, fmt ) ;
    do_logv( MY_LOG_BUG, fmt, arg_ptr );
    va_end(arg_ptr);
    abort(); /* never called, bugs it makes the compiler happy */
}

void
log_debug( const char *fmt, ... )
{
    va_list arg_ptr ;

    va_start( arg_ptr, fmt ) ;
    do_logv( MY_LOG_DEBUG, fmt, arg_ptr );
    va_end(arg_ptr);
}


#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5 )
void
bug_at( const char *file, int line, const char *func )
{
    do_log( MY_LOG_BUG,
	     ("... this is a bug (%s:%d:%s)\n"), file, line, func );
    abort(); /* never called, but it makes the compiler happy */
}
#else
void
bug_at( const char *file, int line )
{
    do_log( MY_LOG_BUG,
	     _("you found a bug ... (%s:%d)\n"), file, line);
    abort(); /* never called, but it makes the compiler happy */
}
#endif