Colony » Colony Scout

/*

 * Copyright (c) 2007, Kohsuke Ohtani

 * 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.

 * 3. Neither the name of the author nor the names of any co-contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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.

 */

#include <sys/param.h>

#include <time.h>

#ifndef TYPE_BIT

#define TYPE_BIT(type)        (sizeof (type) * CHAR_BIT)

#endif /* !defined TYPE_BIT */

#ifndef TYPE_SIGNED

#define TYPE_SIGNED(type) (((type) -1) < 0)

#endif /* !defined TYPE_SIGNED */

#ifndef INT_STRLEN_MAXIMUM

/*

** 302 / 1000 is log10(2.0) rounded up.

** Subtract one for the sign bit if the type is signed;

** add one for integer division truncation;

** add one more for a minus sign if the type is signed.

*/

#define INT_STRLEN_MAXIMUM(type) \

    ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))

#endif /* !defined INT_STRLEN_MAXIMUM */

#define        ASCTIME_BUFLEN        (3 * 2 + 5 * INT_STRLEN_MAXIMUM(int) + 3 + 2 + 1 + 1)

char *

asctime(timeptr)

register const struct tm *        timeptr;

{

        static char result[ASCTIME_BUFLEN];

        return asctime_r(timeptr, result);

}