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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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652
lib/roken/strftime.c
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@@ -1,301 +1,385 @@
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1999 Kungliga Tekniska H<>gskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* 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.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 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.
*/
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of KTH 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 KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* 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
#include <config.h>
#endif
#ifdef HAVE_SYS_TYPES_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>
#include "roken.h"
static char *afmt[] = {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
};
static char *Afmt[] = {
"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
"Saturday",
};
static char *bfmt[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
"Oct", "Nov", "Dec",
};
static char *Bfmt[] = {
"January", "February", "March", "April", "May", "June", "July",
"August", "September", "October", "November", "December",
RCSID("$Id$");
static const char *abb_weekdays[] = {
"Sun",
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat",
};
static size_t gsize;
static char *pt;
static const char *full_weekdays[] = {
"Sunday",
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday",
};
static int _add (char *);
static int _conv (int, int, int);
#ifdef HAVE_MKTIME
static int _secs (const struct tm *);
#endif /* HAVE_MKTIME */
static size_t _fmt (const char *, const struct tm *);
static const char *abb_month[] = {
"Jan",
"Feb",
"Mar",
"Apr",
"May",
"Jun",
"Jul",
"Aug",
"Sep",
"Oct",
"Nov",
"Dec"
};
static const char *full_month[] = {
"January",
"February",
"Mars",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"
};
static const char *ampm[] = {
"AM",
"PM"
};
/*
* 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
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;
if ((gsize = maxsize) < 1)
return(0);
if (_fmt(format, t)) {
*pt = '\0';
return(maxsize - gsize);
}
return(0);
}
static size_t
_fmt(const char *format, const struct tm *t)
{
for (; *format; ++format) {
if (*format == '%')
switch(*++format) {
case '\0':
--format;
break;
case 'A':
if (t->tm_wday < 0 || t->tm_wday > 6)
return(0);
if (!_add(Afmt[t->tm_wday]))
return(0);
continue;
case 'a':
if (t->tm_wday < 0 || t->tm_wday > 6)
return(0);
if (!_add(afmt[t->tm_wday]))
return(0);
continue;
case 'B':
if (t->tm_mon < 0 || t->tm_mon > 11)
return(0);
if (!_add(Bfmt[t->tm_mon]))
return(0);
continue;
case 'b':
case 'h':
if (t->tm_mon < 0 || t->tm_mon > 11)
return(0);
if (!_add(bfmt[t->tm_mon]))
return(0);
continue;
case 'C':
if (!_fmt("%a %b %e %H:%M:%S %Y", t))
return(0);
continue;
case 'c':
if (!_fmt("%m/%d/%y %H:%M:%S", t))
return(0);
continue;
case 'D':
if (!_fmt("%m/%d/%y", t))
return(0);
continue;
case 'd':
if (!_conv(t->tm_mday, 2, '0'))
return(0);
continue;
case 'e':
if (!_conv(t->tm_mday, 2, ' '))
return(0);
continue;
case 'H':
if (!_conv(t->tm_hour, 2, '0'))
return(0);
continue;
case 'I':
if (!_conv(t->tm_hour % 12 ?
t->tm_hour % 12 : 12, 2, '0'))
return(0);
continue;
case 'j':
if (!_conv(t->tm_yday + 1, 3, '0'))
return(0);
continue;
case 'k':
if (!_conv(t->tm_hour, 2, ' '))
return(0);
continue;
case 'l':
if (!_conv(t->tm_hour % 12 ?
t->tm_hour % 12 : 12, 2, ' '))
return(0);
continue;
case 'M':
if (!_conv(t->tm_min, 2, '0'))
return(0);
continue;
case 'm':
if (!_conv(t->tm_mon + 1, 2, '0'))
return(0);
continue;
case 'n':
if (!_add("\n"))
return(0);
continue;
case 'p':
if (!_add(t->tm_hour >= 12 ? "PM" : "AM"))
return(0);
continue;
case 'R':
if (!_fmt("%H:%M", t))
return(0);
continue;
case 'r':
if (!_fmt("%I:%M:%S %p", t))
return(0);
continue;
case 'S':
if (!_conv(t->tm_sec, 2, '0'))
return(0);
continue;
#ifdef HAVE_MKTIME
case 's':
if (!_secs(t))
return(0);
continue;
#endif /* HAVE_MKTIME */
case 'T':
case 'X':
if (!_fmt("%H:%M:%S", t))
return(0);
continue;
case 't':
if (!_add("\t"))
return(0);
continue;
case 'U':
if (!_conv((t->tm_yday + 7 - t->tm_wday) / 7,
2, '0'))
return(0);
continue;
case 'W':
if (!_conv((t->tm_yday + 7 -
(t->tm_wday ? (t->tm_wday - 1) : 6))
/ 7, 2, '0'))
return(0);
continue;
case 'w':
if (!_conv(t->tm_wday, 1, '0'))
return(0);
continue;
case 'x':
if (!_fmt("%m/%d/%y", t))
return(0);
continue;
case 'y':
if (!_conv((t->tm_year + TM_YEAR_BASE)
% 100, 2, '0'))
return(0);
continue;
case 'Y':
if (!_conv(t->tm_year + TM_YEAR_BASE, 4, '0'))
return(0);
continue;
#ifdef notdef
case 'Z':
if (!t->tm_zone || !_add(t->tm_zone))
return(0);
continue;
#endif
case '%':
/*
* X311J/88-090 (4.12.3.5): if conversion char is
* undefined, behavior is undefined. Print out the
* character itself as printf(3) does.
*/
default:
break;
}
if (!gsize--)
return(0);
*pt++ = *format;
}
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);
while (*format != '\0' && n < maxsize) {
if (*format == '%') {
++format;
if(*format == 'E' || *format == 'O')
++format;
switch (*format) {
case 'a' :
ret = snprintf (buf, maxsize - n,
"%s", abb_weekdays[tm->tm_wday]);
break;
case 'A' :
ret = snprintf (buf, maxsize - n,
"%s", full_weekdays[tm->tm_wday]);
break;
case 'h' :
case 'b' :
ret = snprintf (buf, maxsize - n,
"%s", abb_month[tm->tm_mon]);
break;
case 'B' :
ret = snprintf (buf, maxsize - n,
"%s", full_month[tm->tm_mon]);
break;
case 'c' :
ret = snprintf (buf, maxsize - n,
"%d:%02d:%02d %02d:%02d:%02d",
tm->tm_year,
tm->tm_mon + 1,
tm->tm_mday,
tm->tm_hour,
tm->tm_min,
tm->tm_sec);
break;
case 'C' :
ret = snprintf (buf, maxsize - n,
"%02d", (tm->tm_year + 1900) / 100);
break;
case 'd' :
ret = snprintf (buf, maxsize - n,
"%02d", tm->tm_mday);
break;
case 'D' :
ret = snprintf (buf, maxsize - n,
"%02d/%02d/%02d",
tm->tm_mon + 1,
tm->tm_mday,
(tm->tm_year + 1900) % 100);
break;
case 'e' :
ret = snprintf (buf, maxsize - n,
"%2d", tm->tm_mday);
break;
case 'F':
ret = snprintf (buf, maxsize - n,
"%04d-%02d-%02d", tm->tm_year + 1900,
tm->tm_mon + 1, tm->tm_mday);
break;
case 'g':
/* last two digits of week-based year */
abort();
case 'G':
/* week-based year */
abort();
case 'H' :
ret = snprintf (buf, maxsize - n,
"%02d", tm->tm_hour);
break;
case 'I' :
ret = snprintf (buf, maxsize - n,
"%02d",
hour_24to12 (tm->tm_hour));
break;
case 'j' :
ret = snprintf (buf, maxsize - n,
"%03d", tm->tm_yday + 1);
break;
case 'k' :
ret = snprintf (buf, maxsize - n,
"%2d", tm->tm_hour);
break;
case 'l' :
ret = snprintf (buf, maxsize - n,
"%2d",
hour_24to12 (tm->tm_hour));
break;
case 'm' :
ret = snprintf (buf, maxsize - n,
"%02d", tm->tm_mon + 1);
break;
case 'M' :
ret = snprintf (buf, maxsize - n,
"%02d", tm->tm_min);
break;
case 'n' :
ret = snprintf (buf, maxsize - n, "\n");
break;
case 'p' :
ret = snprintf (buf, maxsize - n, "%s",
hour_to_ampm (tm->tm_hour));
break;
case 'r' :
ret = snprintf (buf, maxsize - n,
"%02d:%02d:%02d %s",
hour_24to12 (tm->tm_hour),
tm->tm_min,
tm->tm_sec,
hour_to_ampm (tm->tm_hour));
break;
case 'R' :
ret = snprintf (buf, maxsize - n,
"%02d:%02d",
tm->tm_hour,
tm->tm_min);
case 's' :
ret = snprintf (buf, maxsize - n,
"%d", (int)mktime((struct tm *)tm));
break;
case 'S' :
ret = snprintf (buf, maxsize - n,
"%02d", tm->tm_sec);
break;
case 't' :
ret = snprintf (buf, maxsize - n, "\t");
break;
case 'T' :
case 'X' :
ret = snprintf (buf, maxsize - n,
"%02d:%02d:%02d",
tm->tm_hour,
tm->tm_min,
tm->tm_sec);
break;
case 'u' :
ret = snprintf (buf, maxsize - n,
"%d", (tm->tm_wday == 0) ? 7 : tm->tm_wday);
break;
case 'U' :
ret = snprintf (buf, maxsize - n,
"%02d", week_number_sun (tm));
break;
case 'V' :
ret = snprintf (buf, maxsize - n,
"%02d", week_number_mon4 (tm));
break;
case 'w' :
ret = snprintf (buf, maxsize - n,
"%d", tm->tm_wday);
break;
case 'W' :
ret = snprintf (buf, maxsize - n,
"%02d", week_number_mon (tm));
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
);
break;
case 'Z' :
ret = snprintf (buf, maxsize - n,
"%s", tm->tm_zone);
break;
case '\0' :
--format;
/* FALLTHROUGH */
case '%' :
ret = snprintf (buf, maxsize - n,
"%%");
break;
default :
ret = snprintf (buf, maxsize - n,
"%%%c", *format);
break;
}
if (ret >= maxsize - n)
return 0;
n += ret;
buf += ret;
++format;
} else {
*buf++ = *format++;
++n;
}
}
*buf++ = '\0';
return n;
}