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/* $Header$ */ |
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/* |
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* strftime.c -- |
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* |
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* This file contains a modified version of the BSD 4.4 strftime |
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* function. |
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* |
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* This file is a modified version of the strftime.c file from the BSD 4.4 |
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* source. See the copyright notice below for details on redistribution |
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* restrictions. The "license.terms" file does not apply to this file. |
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* |
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* RCS: @(#) $Id: strftime.c,v 1.1.1.1 2001/06/13 04:32:38 dtashley Exp $ |
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*/ |
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|
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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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|
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#if defined(LIBC_SCCS) |
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static char *rcsid = "$Id: strftime.c,v 1.1.1.1 2001/06/13 04:32:38 dtashley Exp $"; |
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#endif /* LIBC_SCCS */ |
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|
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#include <time.h> |
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#include <string.h> |
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#include <locale.h> |
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#include "tclInt.h" |
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#include "tclPort.h" |
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|
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#define TM_YEAR_BASE 1900 |
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#define IsLeapYear(x) ((x % 4 == 0) && (x % 100 != 0 || x % 400 == 0)) |
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|
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typedef struct { |
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const char *abday[7]; |
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const char *day[7]; |
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const char *abmon[12]; |
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const char *mon[12]; |
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const char *am_pm[2]; |
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const char *d_t_fmt; |
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const char *d_fmt; |
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const char *t_fmt; |
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const char *t_fmt_ampm; |
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} _TimeLocale; |
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|
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static const _TimeLocale _DefaultTimeLocale = |
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{ |
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{ |
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"Sun","Mon","Tue","Wed","Thu","Fri","Sat", |
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}, |
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{ |
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"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", |
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"Friday", "Saturday" |
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}, |
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{ |
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"Jan", "Feb", "Mar", "Apr", "May", "Jun", |
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
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}, |
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{ |
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"January", "February", "March", "April", "May", "June", "July", |
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"August", "September", "October", "November", "December" |
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}, |
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{ |
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"AM", "PM" |
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}, |
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"%a %b %d %H:%M:%S %Y", |
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"%m/%d/%y", |
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"%H:%M:%S", |
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"%I:%M:%S %p" |
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}; |
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|
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static const _TimeLocale *_CurrentTimeLocale = &_DefaultTimeLocale; |
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|
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static size_t gsize; |
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static char *pt; |
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static int _add _ANSI_ARGS_((const char* str)); |
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static int _conv _ANSI_ARGS_((int n, int digits, int pad)); |
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static int _secs _ANSI_ARGS_((const struct tm *t)); |
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static size_t _fmt _ANSI_ARGS_((const char *format, |
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const struct tm *t)); |
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|
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size_t |
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TclpStrftime(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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if (format[0] == '%' && format[1] == 'Q') { |
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/* Format as a stardate */ |
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sprintf(s, "Stardate %2d%03d.%01d", |
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(((t->tm_year + TM_YEAR_BASE) + 377) - 2323), |
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(((t->tm_yday + 1) * 1000) / |
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(365 + IsLeapYear((t->tm_year + TM_YEAR_BASE)))), |
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(((t->tm_hour * 60) + t->tm_min)/144)); |
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return(strlen(s)); |
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} |
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|
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tzset(); |
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|
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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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|
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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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|
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static size_t |
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_fmt(format, t) |
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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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|
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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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|
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|
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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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|
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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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#ifndef MAC_TCL |
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case 'Z': { |
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char *name = TclpGetTZName(t->tm_isdst); |
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if (name && !_add(name)) { |
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return 0; |
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} |
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continue; |
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} |
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#endif |
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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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|
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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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|
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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-- = (char)(s % 10 + '0'); |
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return(_add(++p)); |
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} |
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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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int pad; |
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{ |
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static char buf[10]; |
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register char *p; |
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|
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for (p = buf + sizeof(buf) - 2; n > 0 && p > buf; n /= 10, --digits) |
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*p-- = (char)(n % 10 + '0'); |
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while (p > buf && digits-- > 0) |
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*p-- = (char) pad; |
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return(_add(++p)); |
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} |
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|
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static int |
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_add(str) |
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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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|
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/* End of strftime.c */ |
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