/*********************************************************** Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum, Amsterdam, The Netherlands. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the names of Stichting Mathematisch Centrum or CWI not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ******************************************************************/ /* Time module */ #include "allobjects.h" #include "modsupport.h" #include "ceval.h" #ifdef macintosh #include #else #include #endif #ifdef QUICKWIN #include #endif #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_SELECT #include "myselect.h" #else #include "mytime.h" #endif #ifdef HAVE_FTIME #include #endif #ifdef _M_IX86 #include #define timezone _timezone #endif /* Forward declarations */ static int floatsleep PROTO((double)); static double floattime PROTO(()); static object * time_time(self, args) object *self; object *args; { double secs; if (!getnoarg(args)) return NULL; secs = floattime(); if (secs == 0.0) { err_errno(IOError); return NULL; } return newfloatobject(secs); } #ifdef HAVE_CLOCK #ifndef CLOCKS_PER_SEC #define CLOCKS_PER_SEC 1000000 #endif static object * time_clock(self, args) object *self; object *args; { if (!getnoarg(args)) return NULL; return newfloatobject(((double)clock()) / CLOCKS_PER_SEC); } #endif /* HAVE_CLOCK */ static object * time_sleep(self, args) object *self; object *args; { double secs; if (!getargs(args, "d", &secs)) return NULL; BGN_SAVE if (floatsleep(secs) != 0) { RET_SAVE return NULL; } END_SAVE INCREF(None); return None; } static object * time_convert(when, function) time_t when; struct tm * (*function) PROTO((const time_t *)); { struct tm *p = function(&when); return mkvalue("(iiiiiiiii)", p->tm_year + 1900, p->tm_mon + 1, /* Want January == 1 */ p->tm_mday, p->tm_hour, p->tm_min, p->tm_sec, (p->tm_wday + 6) % 7, /* Want Monday == 0 */ p->tm_yday + 1, /* Want January, 1 == 1 */ p->tm_isdst); } static object * time_gmtime(self, args) object *self; object *args; { double when; if (!getargs(args, "d", &when)) return NULL; return time_convert((time_t)when, gmtime); } static object * time_localtime(self, args) object *self; object *args; { double when; if (!getargs(args, "d", &when)) return NULL; return time_convert((time_t)when, localtime); } static int gettmarg(args, p) object *args; struct tm *p; { if (!getargs(args, "(iiiiiiiii)", &p->tm_year, &p->tm_mon, &p->tm_mday, &p->tm_hour, &p->tm_min, &p->tm_sec, &p->tm_wday, &p->tm_yday, &p->tm_isdst)) return 0; if (p->tm_year >= 1900) p->tm_year -= 1900; p->tm_mon--; p->tm_wday = (p->tm_wday + 1) % 7; p->tm_yday--; return 1; } static object * time_asctime(self, args) object *self; object *args; { struct tm buf; char *p; if (!gettmarg(args, &buf)) return NULL; p = asctime(&buf); if (p[24] == '\n') p[24] = '\0'; return newstringobject(p); } static object * time_ctime(self, args) object *self; object *args; { double dt; time_t tt; char *p; if (!getargs(args, "d", &dt)) return NULL; tt = dt; p = ctime(&tt); if (p[24] == '\n') p[24] = '\0'; return newstringobject(p); } static object * time_mktime(self, args) object *self; object *args; { struct tm buf; if (!gettmarg(args, &buf)) return NULL; return newintobject((long)mktime(&buf)); } static struct methodlist time_methods[] = { {"time", time_time}, #ifdef HAVE_CLOCK {"clock", time_clock}, #endif {"sleep", time_sleep}, {"gmtime", time_gmtime}, {"localtime", time_localtime}, {"asctime", time_asctime}, {"ctime", time_ctime}, {"mktime", time_mktime}, {NULL, NULL} /* sentinel */ }; void inittime() { object *m, *d; m = initmodule("time", time_methods); d = getmoduledict(m); #ifdef HAVE_TZNAME tzset(); dictinsert(d, "timezone", newintobject((long)timezone)); #ifdef HAVE_ALTZONE dictinsert(d, "altzone", newintobject((long)altzone)); #else dictinsert(d, "altzone", newintobject((long)timezone-3600)); #endif dictinsert(d, "daylight", newintobject((long)daylight)); dictinsert(d, "tzname", mkvalue("(zz)", tzname[0], tzname[1])); #else /* !HAVE_TZNAME */ #if HAVE_TM_ZONE { #define YEAR ((time_t)((365 * 24 + 6) * 3600)) time_t t; struct tm *p; long winterzone, summerzone; char wintername[10], summername[10]; /* XXX This won't work on the southern hemisphere. XXX Anybody got a better idea? */ t = (time((time_t *)0) / YEAR) * YEAR; p = localtime(&t); winterzone = -p->tm_gmtoff; strncpy(wintername, p->tm_zone ? p->tm_zone : " ", 9); wintername[9] = '\0'; t += YEAR/2; p = localtime(&t); summerzone = -p->tm_gmtoff; strncpy(summername, p->tm_zone ? p->tm_zone : " ", 9); summername[9] = '\0'; dictinsert(d, "timezone", newintobject(winterzone)); dictinsert(d, "altzone", newintobject(summerzone)); dictinsert(d, "daylight", newintobject((long)(winterzone != summerzone))); dictinsert(d, "tzname", mkvalue("(zz)", wintername, summername)); } #endif /* HAVE_TM_ZONE */ #endif /* !HAVE_TZNAME */ } /* Implement floattime() for various platforms */ static double floattime() { /* There are three ways to get the time: (1) gettimeofday() -- resolution in microseconds (2) ftime() -- resolution in milliseconds (3) time() -- resolution in seconds In all cases the return value is a float in seconds. Since on some systems (e.g. SCO ODT 3.0) gettimeofday() may fail, so we fall back on ftime() or time(). Note: clock resolution does not imply clock accuracy! */ #ifdef HAVE_GETTIMEOFDAY { struct timeval t; if (gettimeofday(&t, (struct timezone *)NULL) == 0) return (double)t.tv_sec + t.tv_usec*0.000001; } #endif /* !HAVE_GETTIMEOFDAY */ { #ifdef HAVE_FTIME struct timeb t; ftime(&t); return (double)t.time + t.millitm*0.001; #else /* !HAVE_FTIME */ time_t secs; time(&secs); return (double)secs; #endif /* !HAVE_FTIME */ } } /* Implement floatsleep() for various platforms. When interrupted (or when another error occurs), return -1 and set an exception; else return 0. */ static int floatsleep(secs) double secs; { #ifdef HAVE_SELECT struct timeval t; double frac; extern double fmod PROTO((double, double)); extern double floor PROTO((double)); frac = fmod(secs, 1.0); secs = floor(secs); t.tv_sec = (long)secs; t.tv_usec = (long)(frac*1000000.0); if (select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &t) != 0) { err_errno(IOError); return -1; } #else /* !HAVE_SELECT */ #ifdef macintosh #define MacTicks (* (long *)0x16A) long deadline; deadline = MacTicks + (long)(secs * 60.0); while (MacTicks < deadline) { if (sigcheck()) return -1; } #else /* !macintosh */ #ifdef MSDOS struct timeb t1, t2; double frac; extern double fmod PROTO((double, double)); extern double floor PROTO((double)); if (secs <= 0.0) return; frac = fmod(secs, 1.0); secs = floor(secs); ftime(&t1); t2.time = t1.time + (int)secs; t2.millitm = t1.millitm + (int)(frac*1000.0); while (t2.millitm >= 1000) { t2.time++; t2.millitm -= 1000; } for (;;) { #ifdef QUICKWIN _wyield(); #endif if (sigcheck()) return -1; ftime(&t1); if (t1.time > t2.time || t1.time == t2.time && t1.millitm >= t2.millitm) break; } #else /* !MSDOS */ #ifdef _M_IX86 /* XXX Can't interrupt this sleep */ Sleep((int)(secs*1000)); #else /* _M_IX86 */ /* XXX Can't interrupt this sleep */ sleep((int)secs); #endif /* _M_IX86 */ #endif /* !MSDOS */ #endif /* !macintosh */ #endif /* !HAVE_SELECT */ return 0; }