home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Cream of the Crop 26
/
Cream of the Crop 26.iso
/
os2
/
octa209s.zip
/
octave-2.09
/
src
/
time.cc
< prev
next >
Wrap
C/C++ Source or Header
|
1997-05-26
|
8KB
|
321 lines
/*
Copyright (C) 1996 John W. Eaton
This file is part of Octave.
Octave 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.
Octave 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 Octave; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string>
#include<iostream.h>
#include "defun-dld.h"
#include "error.h"
#include "help.h"
#include "oct-map.h"
#include "systime.h"
#include "ov.h"
#include "oct-obj.h"
#include "utils.h"
// Date and time functions.
static Octave_map
mk_tm_map (struct tm *tm, double fraction)
{
Octave_map m;
m ["usec"] = fraction * 1e6;
m ["sec"] = (double) tm->tm_sec;
m ["min"] = (double) tm->tm_min;
m ["hour"] = (double) tm->tm_hour;
m ["mday"] = (double) tm->tm_mday;
m ["mon"] = (double) tm->tm_mon;
m ["year"] = (double) tm->tm_year;
m ["wday"] = (double) tm->tm_wday;
m ["yday"] = (double) tm->tm_yday;
m ["isdst"] = (double) tm->tm_isdst;
#if defined (HAVE_TM_ZONE)
m ["zone"] = tm->tm_zone;
#elif defined (HAVE_TZNAME)
if (tm->tm_isdst == 0 || tm->tm_isdst == 1)
m ["zone"] = tzname[tm->tm_isdst];
#endif
return m;
}
static struct tm*
extract_tm (Octave_map &m, double& fraction)
{
static struct tm tm;
fraction = (m ["usec"] . double_value ()) / 1e6;
tm.tm_sec = NINT (m ["sec"] . double_value ());
tm.tm_min = NINT (m ["min"] . double_value ());
tm.tm_hour = NINT (m ["hour"] . double_value ());
tm.tm_mday = NINT (m ["mday"] . double_value ());
tm.tm_mon = NINT (m ["mon"] . double_value ());
tm.tm_year = NINT (m ["year"] . double_value ());
tm.tm_wday = NINT (m ["wday"] . double_value ());
tm.tm_yday = NINT (m ["yday"] . double_value ());
tm.tm_isdst = NINT (m ["isdst"] . double_value ());
#if defined (HAVE_TM_ZONE)
static char *tm_zone = 0;
string tstr = m ["zone"] . string_value ();
delete [] tm_zone;
tm_zone = strsave (tstr.c_str ());
tm.tm_zone = tm_zone;
#endif
return &tm;
}
DEFUN_DLD (time, , ,
"time ()\n\
\n\
Return current time. On Unix systems, this is the number of\n\
seconds since the epoch.")
{
time_t now;
double fraction = 0.0;
#if defined (HAVE_GETTIMEOFDAY)
struct timeval tp;
#if defined (GETTIMEOFDAY_NO_TZ)
gettimeofday (&tp);
#else
gettimeofday (&tp, 0);
#endif
now = tp.tv_sec;
fraction = tp.tv_usec / 1e6;
#else
now = time (0);
#endif
return (double) now + fraction;
}
DEFUN_DLD (gmtime, args, ,
"gmtime (TIME)\n\
\n\
Given a value returned from time(), return a structure like that\n\
returned from localtime() but with values corresponding to\n\
Coordinated Universal Time (UTC).")
{
octave_value_list retval;
if (args.length () == 1)
{
double tmp = args(0).double_value ();
if (! error_state)
{
time_t timeval = NINT (tmp);
double ip;
double fraction = modf (tmp, &ip);
retval = octave_value (mk_tm_map (gmtime (&timeval), fraction));
}
}
else
print_usage ("gmtime");
return retval;
}
DEFUN_DLD (localtime, args, ,
"localtime (TIME)\n\
\n\
Given a value returned from time(), return a structure with\n\
the following elements:\n\
\n\
usec : microseconds after the second (0, 999999)\n\
sec : seconds after the minute (0, 61)\n\
min : minutes after the hour (0, 59)\n\
hour : hours since midnight (0, 23)\n\
mday : day of the month (1, 31)\n\
mon : months since January (0, 11)\n\
year : years since 1900\n\
wday : days since Sunday (0, 6)\n\
yday : days since January 1 (0, 365)\n\
isdst : Daylight Savings Time flag\n\
zone : Time zone")
{
octave_value_list retval;
if (args.length () == 1)
{
double tmp = args(0).double_value ();
if (! error_state)
{
time_t timeval = NINT (tmp);
double ip;
double fraction = modf (tmp, &ip);
retval = octave_value (mk_tm_map (localtime (&timeval), fraction));
}
}
else
print_usage ("localtime");
return retval;
}
DEFUN_DLD (mktime, args, ,
"mktime (TMSTRUCT)")
{
octave_value_list retval;
if (args.length () == 1 && args(0).is_map ())
{
Octave_map map = args(0).map_value ();
double fraction;
struct tm *tm = extract_tm (map, fraction);
if (! error_state)
retval = (double) mktime (tm) + fraction;
}
else
print_usage ("mktime");
return retval;
}
DEFUN_DLD (strftime, args, ,
"strftime (FMT, TMSTRUCT)\n\
\n\
Performs `%' substitutions similar to those in printf. Except where\n\
noted, substituted fields have a fixed size; numeric fields are\n\
padded if necessary. Padding is with zeros by default; for fields\n\
that display a single number, padding can be changed or inhibited by\n\
following the `%' with one of the modifiers described below.\n\
Unknown field specifiers are copied as normal characters. All other\n\
characters are copied to the output without change.\n\
\n\
Supports a superset of the ANSI C field specifiers.\n\
\n\
Literal character fields:\n\
\n\
% %\n\
n newline\n\
t tab\n\
\n\
Numeric modifiers (a nonstandard extension):\n\
\n\
- do not pad the field\n\
_ pad the field with spaces\n\
\n\
Time fields:\n\
\n\
%H hour (00..23)\n\
%I hour (01..12)\n\
%k hour ( 0..23)\n\
%l hour ( 1..12)\n\
%M minute (00..59)\n\
%p locale's AM or PM\n\
%r time, 12-hour (hh:mm:ss [AP]M)\n\
%R time, 24-hour (hh:mm)\n\
%s time in seconds since 00:00:00, Jan 1, 1970 (a nonstandard extension)\n\
%S second (00..61)\n\
%T time, 24-hour (hh:mm:ss)\n\
%X locale's time representation (%H:%M:%S)\n\
%Z time zone (EDT), or nothing if no time zone is determinable\n\
%z offset from GMT\n\
\n\
Date fields:\n\
\n\
%a locale's abbreviated weekday name (Sun..Sat)\n\
%A locale's full weekday name, variable length (Sunday..Saturday)\n\
%b locale's abbreviated month name (Jan..Dec)\n\
%B locale's full month name, variable length (January..December)\n\
%c locale's date and time (Sat Nov 04 12:02:33 EST 1989)\n\
%C century (00..99)\n\
%d day of month (01..31)\n\
%e day of month ( 1..31)\n\
%D date (mm/dd/yy)\n\
%h same as %b\n\
%j day of year (001..366)\n\
%m month (01..12)\n\
%U week number of year with Sunday as first day of week (00..53)\n\
%w day of week (0..6)\n\
%W week number of year with Monday as first day of week (00..53)\n\
%x locale's date representation (mm/dd/yy)\n\
%y last two digits of year (00..99)\n\
%Y year (1970...)")
{
octave_value_list retval;
if (args.length () == 2 && args(0).is_string () && args(1).is_map ())
{
string fmt = args(0).string_value ();
Octave_map map = args(1).map_value ();
double fraction;
struct tm *tm = extract_tm (map, fraction);
if (! error_state)
{
const char *fmt_str = fmt.c_str ();
size_t bufsize = strftime (0, (size_t) UINT_MAX, fmt_str, tm);
char *buf = new char [++bufsize];
buf[0] = '\0';
strftime (buf, bufsize, fmt_str, tm);
retval = buf;
delete [] buf;
}
}
else
print_usage ("strftime");
return retval;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/