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Annotation of prex-old/usr/lib/libc/time/asctime.c, Revision 1.1.1.1

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: }