43fa6fe319
identifier namespace by renaming non standard functions and variables such that they have a leading underscore. The library will use those names internally. Weak aliases are used to provide the original names to the API. This is only the first part of this change. It is most of the functions which are implemented in C for all NetBSD ports. Subsequent changes are to add the same support to the remaining C files, to assembly files, and to the automagically generated assembly source used for system calls. When all of the above is done, ports with weak alias support should add a definition for __weak_alias to <sys/cdefs.h>.
334 lines
7.8 KiB
C
334 lines
7.8 KiB
C
/* $NetBSD: strftime.c,v 1.4 1997/07/21 14:09:22 jtc Exp $ */
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/*
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char *sccsid = "@(#)strftime.c 5.11 (Berkeley) 2/24/91";
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#else
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__RCSID("$NetBSD: strftime.c,v 1.4 1997/07/21 14:09:22 jtc Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/localedef.h>
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#include <locale.h>
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#include <string.h>
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#include <tzfile.h>
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#include <time.h>
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static size_t gsize;
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static char *pt;
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static int _add __P((const char *));
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static int _conv __P((int, int, char));
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static int _secs __P((const struct tm *));
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static size_t _fmt __P((const char *, const struct tm *));
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size_t
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strftime(s, maxsize, format, t)
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char *s;
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size_t maxsize;
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const char *format;
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const struct tm *t;
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{
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tzset();
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pt = s;
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if ((gsize = maxsize) < 1)
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return (0);
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if (_fmt(format, t)) {
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*pt = '\0';
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return (maxsize - gsize);
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}
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return (0);
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}
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#define SUN_WEEK(t) (((t)->tm_yday + 7 - \
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((t)->tm_wday)) / 7)
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#define MON_WEEK(t) (((t)->tm_yday + 7 - \
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((t)->tm_wday ? (t)->tm_wday - 1 : 6)) / 7)
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static size_t
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_fmt(format, t)
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register const char *format;
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const struct tm *t;
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{
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for (; *format; ++format) {
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if (*format == '%') {
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++format;
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if (*format == 'E') {
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/* Alternate Era */
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++format;
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} else if (*format == 'O') {
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/* Alternate numeric symbols */
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++format;
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}
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switch (*format) {
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case '\0':
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--format;
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break;
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case 'A':
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if (t->tm_wday < 0 || t->tm_wday > 6)
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return (0);
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if (!_add(_CurrentTimeLocale->day[t->tm_wday]))
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return (0);
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continue;
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case 'a':
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if (t->tm_wday < 0 || t->tm_wday > 6)
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return (0);
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if (!_add(_CurrentTimeLocale->abday[t->tm_wday]))
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return (0);
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continue;
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case 'B':
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if (t->tm_mon < 0 || t->tm_mon > 11)
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return (0);
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if (!_add(_CurrentTimeLocale->mon[t->tm_mon]))
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return (0);
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continue;
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case 'b':
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case 'h':
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if (t->tm_mon < 0 || t->tm_mon > 11)
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return (0);
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if (!_add(_CurrentTimeLocale->abmon[t->tm_mon]))
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return (0);
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continue;
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case 'C':
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if (!_conv((t->tm_year + TM_YEAR_BASE) / 100,
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2, '0'))
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return (0);
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continue;
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case 'c':
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if (!_fmt(_CurrentTimeLocale->d_t_fmt, t))
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return (0);
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continue;
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case 'D':
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if (!_fmt("%m/%d/%y", t))
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return (0);
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continue;
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case 'd':
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if (!_conv(t->tm_mday, 2, '0'))
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return (0);
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continue;
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case 'e':
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if (!_conv(t->tm_mday, 2, ' '))
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return (0);
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continue;
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case 'H':
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if (!_conv(t->tm_hour, 2, '0'))
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return (0);
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continue;
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case 'I':
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if (!_conv(t->tm_hour % 12 ?
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t->tm_hour % 12 : 12, 2, '0'))
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return (0);
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continue;
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case 'j':
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if (!_conv(t->tm_yday + 1, 3, '0'))
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return (0);
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continue;
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case 'k':
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if (!_conv(t->tm_hour, 2, ' '))
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return (0);
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continue;
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case 'l':
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if (!_conv(t->tm_hour % 12 ?
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t->tm_hour % 12: 12, 2, ' '))
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return (0);
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continue;
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case 'M':
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if (!_conv(t->tm_min, 2, '0'))
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return (0);
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continue;
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case 'm':
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if (!_conv(t->tm_mon + 1, 2, '0'))
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return (0);
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continue;
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case 'n':
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if (!_add("\n"))
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return (0);
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continue;
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case 'p':
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if (!_add(_CurrentTimeLocale->am_pm[t->tm_hour >= 12]))
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return (0);
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continue;
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case 'R':
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if (!_fmt("%H:%M", t))
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return (0);
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continue;
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case 'r':
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if (!_fmt(_CurrentTimeLocale->t_fmt_ampm, t))
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return (0);
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continue;
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case 'S':
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if (!_conv(t->tm_sec, 2, '0'))
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return (0);
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continue;
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case 's':
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if (!_secs(t))
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return (0);
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continue;
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case 'T':
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if (!_fmt("%H:%M:%S", t))
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return (0);
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continue;
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case 't':
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if (!_add("\t"))
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return (0);
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continue;
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case 'U':
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if (!_conv(SUN_WEEK(t), 2, '0'))
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return (0);
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continue;
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case 'u':
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if (!_conv(t->tm_wday ? t->tm_wday : 7, 1, '0'))
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return (0);
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continue;
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case 'V':
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{
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/* ISO 8601 Week Of Year:
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* If the week (Monday - Sunday) containing
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* January 1 has four or more days in the new
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* year, then it is week 1; otherwise it is
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* week 53 of the previous year and the next
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* week is week one.
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*/
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int week = MON_WEEK(t);
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int days = (((t)->tm_yday + 7 -
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((t)->tm_wday ? (t)->tm_wday - 1 : 6)) % 7);
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if (days >= 4) {
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week++;
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} else if (week == 0) {
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week = 53;
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}
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if (!_conv(week, 2, '0'))
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return (0);
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continue;
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}
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case 'W':
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if (!_conv(MON_WEEK(t), 2, '0'))
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return (0);
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continue;
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case 'w':
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if (!_conv(t->tm_wday, 1, '0'))
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return (0);
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continue;
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case 'x':
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if (!_fmt(_CurrentTimeLocale->d_fmt, t))
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return (0);
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continue;
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case 'X':
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if (!_fmt(_CurrentTimeLocale->t_fmt, t))
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return (0);
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continue;
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case 'y':
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if (!_conv((t->tm_year + TM_YEAR_BASE) % 100,
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2, '0'))
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return (0);
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continue;
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case 'Y':
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if (!_conv((t->tm_year + TM_YEAR_BASE), 4, '0'))
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return (0);
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continue;
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case 'Z':
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if (tzname[t->tm_isdst ? 1 : 0] &&
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!_add(tzname[t->tm_isdst ? 1 : 0]))
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return (0);
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continue;
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case '%':
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/*
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* X311J/88-090 (4.12.3.5): if conversion char is
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* undefined, behavior is undefined. Print out the
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* character itself as printf(3) does.
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*/
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default:
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break;
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}
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}
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if (!gsize--)
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return (0);
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*pt++ = *format;
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}
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return (gsize);
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}
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static int
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_secs(t)
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const struct tm *t;
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{
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static char buf[15];
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register time_t s;
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register char *p;
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struct tm tmp;
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/* Make a copy, mktime(3) modifies the tm struct. */
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tmp = *t;
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s = mktime(&tmp);
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for (p = buf + sizeof(buf) - 2; s > 0 && p > buf; s /= 10)
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*p-- = s % 10 + '0';
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return (_add(++p));
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}
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static int
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_conv(n, digits, pad)
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int n, digits;
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char pad;
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{
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static char buf[10];
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register char *p;
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for (p = buf + sizeof(buf) - 2; n > 0 && p > buf; n /= 10, --digits)
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*p-- = n % 10 + '0';
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while (p > buf && digits-- > 0)
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*p-- = pad;
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return (_add(++p));
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}
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static int
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_add(str)
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register const char *str;
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{
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for (;; ++pt, --gsize) {
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if (!gsize)
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return (0);
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if (!(*pt = *str++))
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return (1);
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}
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}
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