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/* Convert between RCS time format and Posix and/or C formats. */
/* Copyright 1992, 1993, 1994, 1995 Paul Eggert
Distributed under license by the Free Software Foundation, Inc.
This file is part of RCS.
RCS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
RCS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with RCS; see the file COPYING.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Report problems and direct all questions to:
rcs-bugs@cs.purdue.edu
*/
#include "rcsbase.h"
#include "partime.h"
#include "maketime.h"
libId(rcstimeId, "$FreeBSD$")
static long zone_offset; /* seconds east of UTC, or TM_LOCAL_ZONE */
static int use_zone_offset; /* if zero, use UTC without zone indication */
/*
* Convert Unix time to RCS format.
* For compatibility with older versions of RCS,
* dates from 1900 through 1999 are stored without the leading "19".
*/
void
time2date(unixtime,date)
time_t unixtime;
char date[datesize];
{
register struct tm const *tm = time2tm(unixtime, RCSversion<VERSION(5));
VOID sprintf(date,
# if has_printf_dot
"%.2d.%.2d.%.2d.%.2d.%.2d.%.2d",
# else
"%02d.%02d.%02d.%02d.%02d.%02d",
# endif
tm->tm_year + ((unsigned)tm->tm_year < 100 ? 0 : 1900),
tm->tm_mon+1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec
);
}
/* Like str2time, except die if an error was found. */
static time_t str2time_checked P((char const*,time_t,long));
static time_t
str2time_checked(source, default_time, default_zone)
char const *source;
time_t default_time;
long default_zone;
{
time_t t = str2time(source, default_time, default_zone);
if (t == -1)
faterror("unknown date/time: %s", source);
return t;
}
/*
* Parse a free-format date in SOURCE, convert it
* into RCS internal format, and store the result into TARGET.
*/
void
str2date(source, target)
char const *source;
char target[datesize];
{
time2date(
str2time_checked(source, now(),
use_zone_offset ? zone_offset
: RCSversion<VERSION(5) ? TM_LOCAL_ZONE
: 0
),
target
);
}
/* Convert an RCS internal format date to time_t. */
time_t
date2time(source)
char const source[datesize];
{
char s[datesize + zonelenmax];
return str2time_checked(date2str(source, s), (time_t)0, 0);
}
/* Set the time zone for date2str output. */
void
zone_set(s)
char const *s;
{
if ((use_zone_offset = *s)) {
long zone;
char const *zonetail = parzone(s, &zone);
if (!zonetail || *zonetail)
error("%s: not a known time zone", s);
else
zone_offset = zone;
}
}
/*
* Format a user-readable form of the RCS format DATE into the buffer DATEBUF.
* Yield DATEBUF.
*/
char const *
date2str(date, datebuf)
char const date[datesize];
char datebuf[datesize + zonelenmax];
{
register char const *p = date;
while (*p++ != '.')
continue;
if (!use_zone_offset)
VOID sprintf(datebuf,
"19%.*s/%.2s/%.2s %.2s:%.2s:%s"
+ (date[2]=='.' && VERSION(5)<=RCSversion ? 0 : 2),
(int)(p-date-1), date,
p, p+3, p+6, p+9, p+12
);
else {
struct tm t;
struct tm const *z;
int non_hour;
long zone;
char c;
t.tm_year = atoi(date) - (date[2]=='.' ? 0 : 1900);
t.tm_mon = atoi(p) - 1;
t.tm_mday = atoi(p+3);
t.tm_hour = atoi(p+6);
t.tm_min = atoi(p+9);
t.tm_sec = atoi(p+12);
t.tm_wday = -1;
zone = zone_offset;
if (zone == TM_LOCAL_ZONE) {
time_t u = tm2time(&t, 0), d;
z = localtime(&u);
d = difftm(z, &t);
zone = (time_t)-1 < 0 || d < -d ? d : -(long)-d;
} else {
adjzone(&t, zone);
z = &t;
}
c = '+';
if (zone < 0) {
zone = -zone;
c = '-';
}
VOID sprintf(datebuf,
# if has_printf_dot
"%.2d-%.2d-%.2d %.2d:%.2d:%.2d%c%.2d",
# else
"%02d-%02d-%02d %02d:%02d:%02d%c%02d",
# endif
z->tm_year + 1900,
z->tm_mon + 1, z->tm_mday, z->tm_hour, z->tm_min, z->tm_sec,
c, (int) (zone / (60*60))
);
if ((non_hour = zone % (60*60))) {
# if has_printf_dot
static char const fmt[] = ":%.2d";
# else
static char const fmt[] = ":%02d";
# endif
VOID sprintf(datebuf + strlen(datebuf), fmt, non_hour / 60);
if ((non_hour %= 60))
VOID sprintf(datebuf + strlen(datebuf), fmt, non_hour);
}
}
return datebuf;
}
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