505 lines
11 KiB
C
505 lines
11 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Time module */
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#include "allobjects.h"
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#include "modsupport.h"
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#include "ceval.h"
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#ifdef HAVE_SELECT
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#include "mymath.h"
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#endif
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#ifdef macintosh
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#include <time.h>
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#else
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#include <sys/types.h>
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#endif
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#ifdef QUICKWIN
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#include <io.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SELECT
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#include "myselect.h"
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#else
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#include "mytime.h"
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#endif
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#ifdef HAVE_FTIME
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#include <sys/timeb.h>
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extern int ftime();
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#endif
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#ifdef __WATCOMC__
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#include <i86.h>
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#else
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#ifdef MS_WINDOWS
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#include <windows.h>
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#ifdef MS_WIN16
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/* These overrides not needed for Win32 */
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#define timezone _timezone
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#define tzname _tzname
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#define daylight _daylight
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#define altzone _altzone
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#endif /* MS_WIN16 */
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#endif /* MS_WINDOWS */
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#endif /* !__WATCOMC__ */
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/* Forward declarations */
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static int floatsleep PROTO((double));
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static double floattime PROTO(());
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static object *
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time_time(self, args)
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object *self;
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object *args;
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{
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double secs;
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if (!getnoarg(args))
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return NULL;
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secs = floattime();
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if (secs == 0.0) {
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err_errno(IOError);
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return NULL;
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}
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return newfloatobject(secs);
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}
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#ifdef HAVE_CLOCK
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#ifndef CLOCKS_PER_SEC
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#ifdef CLK_TCK
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#define CLOCKS_PER_SEC CLK_TCK
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#else
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#define CLOCKS_PER_SEC 1000000
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#endif
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#endif
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static object *
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time_clock(self, args)
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object *self;
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object *args;
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{
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if (!getnoarg(args))
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return NULL;
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return newfloatobject(((double)clock()) / CLOCKS_PER_SEC);
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}
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#endif /* HAVE_CLOCK */
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static object *
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time_sleep(self, args)
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object *self;
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object *args;
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{
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double secs;
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if (!getargs(args, "d", &secs))
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return NULL;
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BGN_SAVE
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if (floatsleep(secs) != 0) {
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RET_SAVE
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return NULL;
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}
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END_SAVE
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INCREF(None);
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return None;
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}
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static object *
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time_convert(when, function)
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time_t when;
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struct tm * (*function) PROTO((const time_t *));
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{
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struct tm *p;
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errno = 0;
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p = function(&when);
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if (p == NULL) {
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#ifdef EINVAL
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if (errno == 0)
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errno = EINVAL;
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#endif
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return err_errno(IOError);
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}
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return mkvalue("(iiiiiiiii)",
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p->tm_year + 1900,
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p->tm_mon + 1, /* Want January == 1 */
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p->tm_mday,
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p->tm_hour,
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p->tm_min,
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p->tm_sec,
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(p->tm_wday + 6) % 7, /* Want Monday == 0 */
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p->tm_yday + 1, /* Want January, 1 == 1 */
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p->tm_isdst);
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}
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static object *
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time_gmtime(self, args)
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object *self;
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object *args;
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{
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double when;
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if (!getargs(args, "d", &when))
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return NULL;
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return time_convert((time_t)when, gmtime);
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}
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static object *
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time_localtime(self, args)
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object *self;
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object *args;
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{
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double when;
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if (!getargs(args, "d", &when))
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return NULL;
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return time_convert((time_t)when, localtime);
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}
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static int
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gettmarg(args, p)
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object *args;
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struct tm *p;
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{
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if (!getargs(args, "(iiiiiiiii)",
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&p->tm_year,
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&p->tm_mon,
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&p->tm_mday,
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&p->tm_hour,
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&p->tm_min,
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&p->tm_sec,
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&p->tm_wday,
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&p->tm_yday,
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&p->tm_isdst))
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return 0;
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if (p->tm_year >= 1900)
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p->tm_year -= 1900;
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p->tm_mon--;
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p->tm_wday = (p->tm_wday + 1) % 7;
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p->tm_yday--;
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return 1;
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}
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#ifdef HAVE_STRFTIME
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static object *
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time_strftime(self, args)
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object *self;
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object *args;
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{
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struct tm buf;
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const char *fmt;
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char *outbuf = 0;
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int i;
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if (!PyArg_ParseTuple(args, "s(iiiiiiiii)",
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&fmt,
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&(buf.tm_year),
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&(buf.tm_mon),
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&(buf.tm_mday),
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&(buf.tm_hour),
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&(buf.tm_min),
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&(buf.tm_sec),
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&(buf.tm_wday),
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&(buf.tm_yday),
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&(buf.tm_isdst)))
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return NULL;
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if (buf.tm_year >= 1900)
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buf.tm_year -= 1900;
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buf.tm_mon--;
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buf.tm_wday = (buf.tm_wday + 1) % 7;
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buf.tm_yday--;
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/* I hate these functions that presume you know how big the output */
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/* will be ahead of time... */
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for (i = 1024 ; i < 8192 ; i += 1024) {
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outbuf = malloc(i);
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if (outbuf == NULL) {
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return err_nomem();
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}
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if (strftime(outbuf, i-1, fmt, &buf) != 0) {
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object *ret;
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ret = newstringobject(outbuf);
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free(outbuf);
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return ret;
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}
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free(outbuf);
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}
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return err_nomem();
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}
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#endif /* HAVE_STRFTIME */
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static object *
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time_asctime(self, args)
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object *self;
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object *args;
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{
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struct tm buf;
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char *p;
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if (!gettmarg(args, &buf))
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return NULL;
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p = asctime(&buf);
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if (p[24] == '\n')
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p[24] = '\0';
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return newstringobject(p);
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}
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static object *
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time_ctime(self, args)
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object *self;
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object *args;
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{
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double dt;
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time_t tt;
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char *p;
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if (!getargs(args, "d", &dt))
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return NULL;
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tt = (time_t)dt;
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p = ctime(&tt);
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if (p[24] == '\n')
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p[24] = '\0';
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return newstringobject(p);
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}
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static object *
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time_mktime(self, args)
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object *self;
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object *args;
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{
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struct tm buf;
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time_t tt;
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tt = time(&tt);
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buf = *localtime(&tt);
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if (!gettmarg(args, &buf))
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return NULL;
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tt = mktime(&buf);
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if (tt == (time_t)(-1)) {
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err_setstr(OverflowError, "mktime argument out of range");
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return NULL;
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}
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return newfloatobject((double)tt);
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}
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static struct methodlist time_methods[] = {
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{"time", time_time},
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#ifdef HAVE_CLOCK
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{"clock", time_clock},
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#endif
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{"sleep", time_sleep},
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{"gmtime", time_gmtime},
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{"localtime", time_localtime},
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{"asctime", time_asctime},
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{"ctime", time_ctime},
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{"mktime", time_mktime},
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#ifdef HAVE_STRFTIME
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{"strftime", time_strftime, 1},
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#endif
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{NULL, NULL} /* sentinel */
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};
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static void
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ins(d, name, v)
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object *d;
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char *name;
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object *v;
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{
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if (v == NULL)
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fatal("Can't initialize time module -- NULL value");
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if (dictinsert(d, name, v) != 0)
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fatal("Can't initialize time module -- dictinsert failed");
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DECREF(v);
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}
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void
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inittime()
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{
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object *m, *d;
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m = initmodule("time", time_methods);
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d = getmoduledict(m);
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#ifdef HAVE_TZNAME
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tzset();
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ins(d, "timezone", newintobject((long)timezone));
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#ifdef HAVE_ALTZONE
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ins(d, "altzone", newintobject((long)altzone));
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#else
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ins(d, "altzone", newintobject((long)timezone-3600));
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#endif
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ins(d, "daylight", newintobject((long)daylight));
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ins(d, "tzname", mkvalue("(zz)", tzname[0], tzname[1]));
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#else /* !HAVE_TZNAME */
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#if HAVE_TM_ZONE
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{
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#define YEAR ((time_t)((365 * 24 + 6) * 3600))
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time_t t;
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struct tm *p;
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long winterzone, summerzone;
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char wintername[10], summername[10];
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/* XXX This won't work on the southern hemisphere.
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XXX Anybody got a better idea? */
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t = (time((time_t *)0) / YEAR) * YEAR;
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p = localtime(&t);
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winterzone = -p->tm_gmtoff;
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strncpy(wintername, p->tm_zone ? p->tm_zone : " ", 9);
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wintername[9] = '\0';
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t += YEAR/2;
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p = localtime(&t);
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summerzone = -p->tm_gmtoff;
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strncpy(summername, p->tm_zone ? p->tm_zone : " ", 9);
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summername[9] = '\0';
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ins(d, "timezone", newintobject(winterzone));
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ins(d, "altzone", newintobject(summerzone));
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ins(d, "daylight", newintobject((long)(winterzone != summerzone)));
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ins(d, "tzname", mkvalue("(zz)", wintername, summername));
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}
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#endif /* HAVE_TM_ZONE */
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#endif /* !HAVE_TZNAME */
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}
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/* Implement floattime() for various platforms */
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static double
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floattime()
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{
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/* There are three ways to get the time:
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(1) gettimeofday() -- resolution in microseconds
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(2) ftime() -- resolution in milliseconds
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(3) time() -- resolution in seconds
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In all cases the return value is a float in seconds.
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Since on some systems (e.g. SCO ODT 3.0) gettimeofday() may
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fail, so we fall back on ftime() or time().
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Note: clock resolution does not imply clock accuracy! */
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#ifdef HAVE_GETTIMEOFDAY
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{
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struct timeval t;
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#ifdef GETTIMEOFDAY_NO_TZ
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if (gettimeofday(&t) == 0)
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return (double)t.tv_sec + t.tv_usec*0.000001;
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#else /* !GETTIMEOFDAY_NO_TZ */
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if (gettimeofday(&t, (struct timezone *)NULL) == 0)
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return (double)t.tv_sec + t.tv_usec*0.000001;
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#endif /* !GETTIMEOFDAY_NO_TZ */
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}
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#endif /* !HAVE_GETTIMEOFDAY */
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{
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#ifdef HAVE_FTIME
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struct timeb t;
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ftime(&t);
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return (double)t.time + (double)t.millitm * (double)0.001;
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#else /* !HAVE_FTIME */
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time_t secs;
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time(&secs);
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return (double)secs;
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#endif /* !HAVE_FTIME */
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}
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}
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/* Implement floatsleep() for various platforms.
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When interrupted (or when another error occurs), return -1 and
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set an exception; else return 0. */
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static int
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#ifdef MPW
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floatsleep(double secs)
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#else
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floatsleep(secs)
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double secs;
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#endif /* MPW */
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{
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#ifdef HAVE_SELECT
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struct timeval t;
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double frac;
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frac = fmod(secs, 1.0);
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secs = floor(secs);
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t.tv_sec = (long)secs;
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t.tv_usec = (long)(frac*1000000.0);
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if (select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &t) != 0) {
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err_errno(IOError);
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return -1;
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}
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#else /* !HAVE_SELECT */
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#ifdef macintosh
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#define MacTicks (* (long *)0x16A)
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long deadline;
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deadline = MacTicks + (long)(secs * 60.0);
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while (MacTicks < deadline) {
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if (sigcheck())
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return -1;
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}
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#else /* !macintosh */
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#ifdef __WATCOMC__
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/* XXX Can't interrupt this sleep */
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delay((int)(secs * 1000 + 0.5)); /* delay() uses milliseconds */
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#else /* !__WATCOMC__ */
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#ifdef MSDOS
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struct timeb t1, t2;
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double frac;
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extern double fmod PROTO((double, double));
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extern double floor PROTO((double));
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if (secs <= 0.0)
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return;
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frac = fmod(secs, 1.0);
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secs = floor(secs);
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ftime(&t1);
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t2.time = t1.time + (int)secs;
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t2.millitm = t1.millitm + (int)(frac*1000.0);
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while (t2.millitm >= 1000) {
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t2.time++;
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t2.millitm -= 1000;
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}
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for (;;) {
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#ifdef QUICKWIN
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_wyield();
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#endif
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if (sigcheck())
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return -1;
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ftime(&t1);
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if (t1.time > t2.time ||
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t1.time == t2.time && t1.millitm >= t2.millitm)
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break;
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}
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#else /* !MSDOS */
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#ifdef MS_WIN32
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/* XXX Can't interrupt this sleep */
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Sleep((int)(secs*1000));
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#else /* !MS_WIN32 */
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/* XXX Can't interrupt this sleep */
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sleep((int)secs);
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#endif /* !MS_WIN32 */
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#endif /* !MSDOS */
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#endif /* !__WATCOMC__ */
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#endif /* !macintosh */
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#endif /* !HAVE_SELECT */
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return 0;
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}
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