/*

 * Copyright 2011 Tresys Technology, LLC. All rights reserved.

 * 

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 * 

 *    1. Redistributions of source code must retain the above copyright notice,

 *       this list of conditions and the following disclaimer.

 * 

 *    2. Redistributions in binary form must reproduce the above copyright notice,

 *       this list of conditions and the following disclaimer in the documentation

 *       and/or other materials provided with the distribution.

 * 

 * THIS SOFTWARE IS PROVIDED BY TRESYS TECHNOLOGY, LLC ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO

 * EVENT SHALL TRESYS TECHNOLOGY, LLC OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE

 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 * 

 * The views and conclusions contained in the software and documentation are those

 * of the authors and should not be interpreted as representing official policies,

 * either expressed or implied, of Tresys Technology, LLC.

 */

#include <stdlib.h>

#include <stdio.h>

#include <stdarg.h>

#include <string.h>

#include <cil/cil.h>

#include "cil_log.h"

static enum cil_log_level cil_log_level = CIL_ERR;

static void cil_default_log_handler(__attribute__((unused)) int lvl,

            const char *msg)

{

  fprintf(stderr, "%s", msg);

}

static void (*cil_log_handler)(int lvl,

             const char *msg) = &cil_default_log_handler;

void cil_set_log_handler(void (*handler)(int lvl, const char *msg))

{

  cil_log_handler = handler;

}

__attribute__((format(printf, 2, 0))) void

cil_vlog(enum cil_log_level lvl, const char *msg, va_list args)

{

  if (cil_log_level >= lvl) {

    char buff[MAX_LOG_SIZE];

    int n = vsnprintf(buff, MAX_LOG_SIZE, msg, args);

    if (n > 0) {

      (*cil_log_handler)(cil_log_level, buff);

      if (n >= MAX_LOG_SIZE) {

        (*cil_log_handler)(cil_log_level,

               " <LOG MESSAGE TRUNCATED>");

      }

    }

  }

}

__attribute__((format(printf, 2, 3))) void cil_log(enum cil_log_level lvl,

               const char *msg, ...)

{

  va_list args;

  va_start(args, msg);

  cil_vlog(lvl, msg, args);

  va_end(args);

}

void cil_set_log_level(enum cil_log_level lvl)

{

  cil_log_level = lvl;

}

enum cil_log_level cil_get_log_level(void)

{

  return cil_log_level;

}