389 lines
8.4 KiB
C
389 lines
8.4 KiB
C
/***********************************************************
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Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
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Amsterdam, 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 not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR 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 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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#endif
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#ifdef _M_IX86
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#include <windows.h>
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#define timezone _timezone
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#endif
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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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#define CLOCKS_PER_SEC 1000000
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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 = function(&when);
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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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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 = 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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if (!gettmarg(args, &buf))
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return NULL;
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return newintobject((long)mktime(&buf));
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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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{NULL, NULL} /* sentinel */
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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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dictinsert(d, "timezone", newintobject((long)timezone));
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#ifdef HAVE_ALTZONE
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dictinsert(d, "altzone", newintobject((long)altzone));
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#else
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dictinsert(d, "altzone", newintobject((long)timezone-3600));
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#endif
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dictinsert(d, "daylight", newintobject((long)daylight));
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dictinsert(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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dictinsert(d, "timezone", newintobject(winterzone));
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dictinsert(d, "altzone", newintobject(summerzone));
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dictinsert(d, "daylight",
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newintobject((long)(winterzone != summerzone)));
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dictinsert(d, "tzname",
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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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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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}
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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 + t.millitm*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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floatsleep(secs)
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double secs;
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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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extern double fmod PROTO((double, double));
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extern double floor PROTO((double));
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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 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 _M_IX86
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/* XXX Can't interrupt this sleep */
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Sleep((int)(secs*1000));
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#else /* _M_IX86 */
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/* XXX Can't interrupt this sleep */
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sleep((int)secs);
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#endif /* _M_IX86 */
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#endif /* !MSDOS */
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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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