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replace the BSD implementation by one of our own coding

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@7348 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
1999-11-12 15:31:14 +00:00
parent 0d3fc31121
commit 1daa01306f
1 changed files with 368 additions and 284 deletions
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620
lib/roken/strftime.c
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@@ -1,301 +1,385 @@
/* /*
* Copyright (c) 1989, 1993 * Copyright (c) 1999 Kungliga Tekniska H<>gskolan
* The Regents of the University of California. All rights reserved. * (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions * modification, are permitted provided that the following conditions
* are met: * are met:
*
* 1. Redistributions of source code must retain the above copyright * 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer. * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright * 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the * notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution. * documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* *
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * 3. Neither the name of KTH nor the names of its contributors may be
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * used to endorse or promote products derived from this software without
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * specific prior written permission.
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE *
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUCH DAMAGE. * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
*/ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#ifdef HAVE_CONFIG_H #ifdef HAVE_CONFIG_H
#include <config.h> #include <config.h>
#endif #endif
#ifdef HAVE_SYS_TYPES_H #include "roken.h"
#include <sys/types.h>
#endif
#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#elif defined(HAVE_SYS_TIME_H)
#include <sys/time.h>
#else
#include <time.h>
#endif
#define TM_YEAR_BASE 1900 /* from <tzfile.h> */
#include <string.h>
static char *afmt[] = { RCSID("$Id$");
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
static const char *abb_weekdays[] = {
"Sun",
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat",
}; };
static char *Afmt[] = {
"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", static const char *full_weekdays[] = {
"Sunday",
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday", "Saturday",
}; };
static char *bfmt[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", static const char *abb_month[] = {
"Oct", "Nov", "Dec", "Jan",
}; "Feb",
static char *Bfmt[] = { "Mar",
"January", "February", "March", "April", "May", "June", "July", "Apr",
"August", "September", "October", "November", "December", "May",
"Jun",
"Jul",
"Aug",
"Sep",
"Oct",
"Nov",
"Dec"
}; };
static size_t gsize; static const char *full_month[] = {
static char *pt; "January",
"February",
"Mars",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"
};
static int _add (char *); static const char *ampm[] = {
static int _conv (int, int, int); "AM",
#ifdef HAVE_MKTIME "PM"
static int _secs (const struct tm *); };
#endif /* HAVE_MKTIME */
static size_t _fmt (const char *, const struct tm *); /*
* Convert hour in [0, 24] to [12 1 - 11 12 1 - 11 12]
*/
static int
hour_24to12 (int hour)
{
int ret = hour % 12;
if (ret == 0)
ret = 12;
return ret;
}
/*
* Return AM or PM for `hour'
*/
static const char *
hour_to_ampm (int hour)
{
return ampm[hour / 12];
}
/*
* Return the week number of `tm' (Sunday being the first day of the week)
* as [0, 53]
*/
static int
week_number_sun (const struct tm *tm)
{
return (tm->tm_yday + 7 - (tm->tm_yday % 7 - tm->tm_wday + 7) % 7) / 7;
}
/*
* Return the week number of `tm' (Monday being the first day of the week)
* as [0, 53]
*/
static int
week_number_mon (const struct tm *tm)
{
int wday = (tm->tm_wday + 6) % 7;
return (tm->tm_yday + 7 - (tm->tm_yday % 7 - wday + 7) % 7) / 7;
}
/*
* Return the week number of `tm' (Monday being the first day of the
* week) as [01, 53]. Week number one is the one that has four or more
* days in that year.
*/
static int
week_number_mon4 (const struct tm *tm)
{
int wday = (tm->tm_wday + 6) % 7;
int w1day = (wday - tm->tm_yday % 7 + 7) % 7;
int ret;
ret = (tm->tm_yday + w1day) / 7;
if (w1day >= 4)
--ret;
if (ret == -1)
ret = 53;
else
++ret;
return ret;
}
/*
*
*/
size_t size_t
strftime(char *s, size_t maxsize, const char *format, const struct tm *t) strftime (char *buf, size_t maxsize, const char *format,
const struct tm *tm)
{ {
size_t n = 0;
size_t ret;
pt = s; while (*format != '\0' && n < maxsize) {
if ((gsize = maxsize) < 1) if (*format == '%') {
return(0); ++format;
if (_fmt(format, t)) { if(*format == 'E' || *format == 'O')
*pt = '\0'; ++format;
return(maxsize - gsize); switch (*format) {
} case 'a' :
return(0); ret = snprintf (buf, maxsize - n,
} "%s", abb_weekdays[tm->tm_wday]);
static size_t
_fmt(const char *format, const struct tm *t)
{
for (; *format; ++format) {
if (*format == '%')
switch(*++format) {
case '\0':
--format;
break; break;
case 'A': case 'A' :
if (t->tm_wday < 0 || t->tm_wday > 6) ret = snprintf (buf, maxsize - n,
return(0); "%s", full_weekdays[tm->tm_wday]);
if (!_add(Afmt[t->tm_wday])) break;
return(0); case 'h' :
continue; case 'b' :
case 'a': ret = snprintf (buf, maxsize - n,
if (t->tm_wday < 0 || t->tm_wday > 6) "%s", abb_month[tm->tm_mon]);
return(0); break;
if (!_add(afmt[t->tm_wday])) case 'B' :
return(0); ret = snprintf (buf, maxsize - n,
continue; "%s", full_month[tm->tm_mon]);
case 'B': break;
if (t->tm_mon < 0 || t->tm_mon > 11) case 'c' :
return(0); ret = snprintf (buf, maxsize - n,
if (!_add(Bfmt[t->tm_mon])) "%d:%02d:%02d %02d:%02d:%02d",
return(0); tm->tm_year,
continue; tm->tm_mon + 1,
case 'b': tm->tm_mday,
case 'h': tm->tm_hour,
if (t->tm_mon < 0 || t->tm_mon > 11) tm->tm_min,
return(0); tm->tm_sec);
if (!_add(bfmt[t->tm_mon])) break;
return(0); case 'C' :
continue; ret = snprintf (buf, maxsize - n,
case 'C': "%02d", (tm->tm_year + 1900) / 100);
if (!_fmt("%a %b %e %H:%M:%S %Y", t)) break;
return(0); case 'd' :
continue; ret = snprintf (buf, maxsize - n,
case 'c': "%02d", tm->tm_mday);
if (!_fmt("%m/%d/%y %H:%M:%S", t)) break;
return(0); case 'D' :
continue; ret = snprintf (buf, maxsize - n,
case 'D': "%02d/%02d/%02d",
if (!_fmt("%m/%d/%y", t)) tm->tm_mon + 1,
return(0); tm->tm_mday,
continue; (tm->tm_year + 1900) % 100);
case 'd': break;
if (!_conv(t->tm_mday, 2, '0')) case 'e' :
return(0); ret = snprintf (buf, maxsize - n,
continue; "%2d", tm->tm_mday);
case 'e': break;
if (!_conv(t->tm_mday, 2, ' ')) case 'F':
return(0); ret = snprintf (buf, maxsize - n,
continue; "%04d-%02d-%02d", tm->tm_year + 1900,
case 'H': tm->tm_mon + 1, tm->tm_mday);
if (!_conv(t->tm_hour, 2, '0')) break;
return(0); case 'g':
continue; /* last two digits of week-based year */
case 'I': abort();
if (!_conv(t->tm_hour % 12 ? case 'G':
t->tm_hour % 12 : 12, 2, '0')) /* week-based year */
return(0); abort();
continue; case 'H' :
case 'j': ret = snprintf (buf, maxsize - n,
if (!_conv(t->tm_yday + 1, 3, '0')) "%02d", tm->tm_hour);
return(0); break;
continue; case 'I' :
case 'k': ret = snprintf (buf, maxsize - n,
if (!_conv(t->tm_hour, 2, ' ')) "%02d",
return(0); hour_24to12 (tm->tm_hour));
continue; break;
case 'l': case 'j' :
if (!_conv(t->tm_hour % 12 ? ret = snprintf (buf, maxsize - n,
t->tm_hour % 12 : 12, 2, ' ')) "%03d", tm->tm_yday + 1);
return(0); break;
continue; case 'k' :
case 'M': ret = snprintf (buf, maxsize - n,
if (!_conv(t->tm_min, 2, '0')) "%2d", tm->tm_hour);
return(0); break;
continue; case 'l' :
case 'm': ret = snprintf (buf, maxsize - n,
if (!_conv(t->tm_mon + 1, 2, '0')) "%2d",
return(0); hour_24to12 (tm->tm_hour));
continue; break;
case 'n': case 'm' :
if (!_add("\n")) ret = snprintf (buf, maxsize - n,
return(0); "%02d", tm->tm_mon + 1);
continue; break;
case 'p': case 'M' :
if (!_add(t->tm_hour >= 12 ? "PM" : "AM")) ret = snprintf (buf, maxsize - n,
return(0); "%02d", tm->tm_min);
continue; break;
case 'R': case 'n' :
if (!_fmt("%H:%M", t)) ret = snprintf (buf, maxsize - n, "\n");
return(0); break;
continue; case 'p' :
case 'r': ret = snprintf (buf, maxsize - n, "%s",
if (!_fmt("%I:%M:%S %p", t)) hour_to_ampm (tm->tm_hour));
return(0); break;
continue; case 'r' :
case 'S': ret = snprintf (buf, maxsize - n,
if (!_conv(t->tm_sec, 2, '0')) "%02d:%02d:%02d %s",
return(0); hour_24to12 (tm->tm_hour),
continue; tm->tm_min,
#ifdef HAVE_MKTIME tm->tm_sec,
case 's': hour_to_ampm (tm->tm_hour));
if (!_secs(t)) break;
return(0); case 'R' :
continue; ret = snprintf (buf, maxsize - n,
#endif /* HAVE_MKTIME */ "%02d:%02d",
case 'T': tm->tm_hour,
case 'X': tm->tm_min);
if (!_fmt("%H:%M:%S", t))
return(0); case 's' :
continue; ret = snprintf (buf, maxsize - n,
case 't': "%d", (int)mktime((struct tm *)tm));
if (!_add("\t")) break;
return(0); case 'S' :
continue; ret = snprintf (buf, maxsize - n,
case 'U': "%02d", tm->tm_sec);
if (!_conv((t->tm_yday + 7 - t->tm_wday) / 7, break;
2, '0')) case 't' :
return(0); ret = snprintf (buf, maxsize - n, "\t");
continue; break;
case 'W': case 'T' :
if (!_conv((t->tm_yday + 7 - case 'X' :
(t->tm_wday ? (t->tm_wday - 1) : 6)) ret = snprintf (buf, maxsize - n,
/ 7, 2, '0')) "%02d:%02d:%02d",
return(0); tm->tm_hour,
continue; tm->tm_min,
case 'w': tm->tm_sec);
if (!_conv(t->tm_wday, 1, '0')) break;
return(0); case 'u' :
continue; ret = snprintf (buf, maxsize - n,
case 'x': "%d", (tm->tm_wday == 0) ? 7 : tm->tm_wday);
if (!_fmt("%m/%d/%y", t)) break;
return(0); case 'U' :
continue; ret = snprintf (buf, maxsize - n,
case 'y': "%02d", week_number_sun (tm));
if (!_conv((t->tm_year + TM_YEAR_BASE) break;
% 100, 2, '0')) case 'V' :
return(0); ret = snprintf (buf, maxsize - n,
continue; "%02d", week_number_mon4 (tm));
case 'Y': break;
if (!_conv(t->tm_year + TM_YEAR_BASE, 4, '0')) case 'w' :
return(0); ret = snprintf (buf, maxsize - n,
continue; "%d", tm->tm_wday);
#ifdef notdef break;
case 'Z': case 'W' :
if (!t->tm_zone || !_add(t->tm_zone)) ret = snprintf (buf, maxsize - n,
return(0); "%02d", week_number_mon (tm));
continue; break;
case 'x' :
ret = snprintf (buf, maxsize - n,
"%d:%02d:%02d",
tm->tm_year,
tm->tm_mon + 1,
tm->tm_mday);
break;
case 'y' :
ret = snprintf (buf, maxsize - n,
"%02d", (tm->tm_year + 1900) % 100);
break;
case 'Y' :
ret = snprintf (buf, maxsize - n,
"%d", tm->tm_year + 1900);
break;
case 'z':
ret = snprintf (buf, maxsize - n,
"%ld",
#if defined(HAVE_STRUCT_TM_TM_GMTOFF)
(long)tm->tm_gmtoff
#elif defined(HAVE_TIMEZONE)
(long)timezone
#else
#error Where in timezone chaos are you?
#endif #endif
case '%': );
/* break;
* X311J/88-090 (4.12.3.5): if conversion char is case 'Z' :
* undefined, behavior is undefined. Print out the ret = snprintf (buf, maxsize - n,
* character itself as printf(3) does. "%s", tm->tm_zone);
*/ break;
default: case '\0' :
--format;
/* FALLTHROUGH */
case '%' :
ret = snprintf (buf, maxsize - n,
"%%");
break;
default :
ret = snprintf (buf, maxsize - n,
"%%%c", *format);
break; break;
} }
if (!gsize--) if (ret >= maxsize - n)
return(0); return 0;
*pt++ = *format; n += ret;
buf += ret;
++format;
} else {
*buf++ = *format++;
++n;
} }
return(gsize);
}
#ifdef HAVE_MKTIME
static int
_secs(const struct tm *t)
{
static char buf[15];
time_t s;
char *p;
struct tm tmp;
/* Make a copy, mktime(3) modifies the tm struct. */
tmp = *t;
s = mktime(&tmp);
for (p = buf + sizeof(buf) - 2; s > 0 && p > buf; s /= 10)
*p-- = s % 10 + '0';
return(_add(++p));
}
#endif /* HAVE_MKTIME */
static int
_conv(int n, int digits, int pad)
{
static char buf[10];
char *p;
for (p = buf + sizeof(buf) - 2; n > 0 && p > buf; n /= 10, --digits)
*p-- = n % 10 + '0';
while (p > buf && digits-- > 0)
*p-- = pad;
return(_add(++p));
}
static int
_add(str)
char *str;
{
for (;; ++pt, --gsize) {
if (!gsize)
return(0);
if (!(*pt = *str++))
return(1);
} }
*buf++ = '\0';
return n;
} }