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: }
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