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Annotation of prex-old/usr/lib/libc/time/asctime.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2007, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: #include <sys/param.h>
        !            31: #include <time.h>
        !            32:
        !            33:
        !            34: #ifndef TYPE_BIT
        !            35: #define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
        !            36: #endif /* !defined TYPE_BIT */
        !            37:
        !            38: #ifndef TYPE_SIGNED
        !            39: #define TYPE_SIGNED(type) (((type) -1) < 0)
        !            40: #endif /* !defined TYPE_SIGNED */
        !            41:
        !            42: #ifndef INT_STRLEN_MAXIMUM
        !            43: /*
        !            44: ** 302 / 1000 is log10(2.0) rounded up.
        !            45: ** Subtract one for the sign bit if the type is signed;
        !            46: ** add one for integer division truncation;
        !            47: ** add one more for a minus sign if the type is signed.
        !            48: */
        !            49: #define INT_STRLEN_MAXIMUM(type) \
        !            50:     ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))
        !            51: #endif /* !defined INT_STRLEN_MAXIMUM */
        !            52:
        !            53: /*
        !            54: ** Big enough for something such as
        !            55: ** ??? ???-2147483648 -2147483648:-2147483648:-2147483648 -2147483648\n
        !            56: ** (two three-character abbreviations, five strings denoting integers,
        !            57: ** three explicit spaces, two explicit colons, a newline,
        !            58: ** and a trailing ASCII nul).
        !            59: */
        !            60: #define        ASCTIME_BUFLEN  (3 * 2 + 5 * INT_STRLEN_MAXIMUM(int) + 3 + 2 + 1 + 1)
        !            61:
        !            62: char *
        !            63: asctime(timeptr)
        !            64: register const struct tm *     timeptr;
        !            65: {
        !            66:        static char result[ASCTIME_BUFLEN];
        !            67:
        !            68:        return asctime_r(timeptr, result);
        !            69: }