/*********************************************************** Copyright 1991-1995 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 or Corporation for National Research Initiatives or CNRI not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. While CWI is the initial source for this software, a modified version is made available by the Corporation for National Research Initiatives (CNRI) at the Internet address ftp://ftp.python.org. STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM OR CNRI 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 "Python.h" #ifdef HAVE_SELECT #include "mymath.h" #endif #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 #ifndef MS_WINDOWS extern int ftime(); #endif /* MS_WINDOWS */ #endif /* HAVE_FTIME */ #ifdef __WATCOMC__ #include #else #ifdef MS_WINDOWS #include #ifdef MS_WIN16 /* These overrides not needed for Win32 */ #define timezone _timezone #define tzname _tzname #define daylight _daylight #define altzone _altzone #endif /* MS_WIN16 */ #endif /* MS_WINDOWS */ #endif /* !__WATCOMC__ */ #ifdef MS_WIN32 /* Win32 has better clock replacement */ #include #undef HAVE_CLOCK /* We have our own version down below */ #endif /* MS_WIN32 */ /* Forward declarations */ static int floatsleep Py_PROTO((double)); static double floattime Py_PROTO(()); #ifdef macintosh /* Our own timezone. We have enough information to deduce whether ** DST is on currently, but unfortunately we cannot put it to good ** use because we don't know the rules (and that is needed to have ** localtime() return correct tm_isdst values for times other than ** the current time. So, we cop out and only tell the user the current ** timezone. */ static long timezone; static void initmactimezone() { MachineLocation loc; long delta; ReadLocation(&loc); if (loc.latitude == 0 && loc.longitude == 0 && loc.u.gmtDelta == 0) return; delta = loc.u.gmtDelta & 0x00FFFFFF; if (delta & 0x00800000) delta |= 0xFF000000; timezone = -delta; } #endif /* macintosh */ static PyObject * time_time(self, args) PyObject *self; PyObject *args; { double secs; if (!PyArg_NoArgs(args)) return NULL; secs = floattime(); if (secs == 0.0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } return PyFloat_FromDouble(secs); } #ifdef HAVE_CLOCK #ifndef CLOCKS_PER_SEC #ifdef CLK_TCK #define CLOCKS_PER_SEC CLK_TCK #else #define CLOCKS_PER_SEC 1000000 #endif #endif static PyObject * time_clock(self, args) PyObject *self; PyObject *args; { if (!PyArg_NoArgs(args)) return NULL; return PyFloat_FromDouble(((double)clock()) / CLOCKS_PER_SEC); } #endif /* HAVE_CLOCK */ #ifdef MS_WIN32 /* Due to Mark Hammond */ static PyObject * time_clock(self, args) PyObject *self; PyObject *args; { static LARGE_INTEGER ctrStart; static LARGE_INTEGER divisor = {0,0}; LARGE_INTEGER now, diff, rem; if (!PyArg_NoArgs(args)) return NULL; if (LargeIntegerEqualToZero(divisor)) { QueryPerformanceCounter(&ctrStart); if (!QueryPerformanceFrequency(&divisor) || LargeIntegerEqualToZero(divisor)) { /* Unlikely to happen - this works on all intel machines at least! Revert to clock() */ return PyFloat_FromDouble(clock()); } } QueryPerformanceCounter(&now); diff = LargeIntegerSubtract(now, ctrStart); diff = LargeIntegerDivide(diff, divisor, &rem); /* XXX - we assume both divide results fit in 32 bits. This is true on Intels. First person who can afford a machine that doesnt deserves to fix it :-) */ return PyFloat_FromDouble((double)diff.LowPart + ((double)rem.LowPart / (double)divisor.LowPart)); } #define HAVE_CLOCK /* So it gets included in the methods */ #endif /* MS_WIN32 */ static PyObject * time_sleep(self, args) PyObject *self; PyObject *args; { double secs; if (!PyArg_Parse(args, "d", &secs)) return NULL; if (floatsleep(secs) != 0) return NULL; Py_INCREF(Py_None); return Py_None; } static PyObject * time_convert(when, function) time_t when; struct tm * (*function) Py_PROTO((const time_t *)); { struct tm *p; errno = 0; p = function(&when); if (p == NULL) { #ifdef EINVAL if (errno == 0) errno = EINVAL; #endif return PyErr_SetFromErrno(PyExc_IOError); } return Py_BuildValue("(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 PyObject * time_gmtime(self, args) PyObject *self; PyObject *args; { double when; if (!PyArg_Parse(args, "d", &when)) return NULL; return time_convert((time_t)when, gmtime); } static PyObject * time_localtime(self, args) PyObject *self; PyObject *args; { double when; if (!PyArg_Parse(args, "d", &when)) return NULL; return time_convert((time_t)when, localtime); } static int gettmarg(args, p) PyObject *args; struct tm *p; { if (!PyArg_Parse(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; } #ifdef HAVE_STRFTIME static PyObject * time_strftime(self, args) PyObject *self; PyObject *args; { struct tm buf; const char *fmt; char *outbuf = 0; int i; if (!PyArg_ParseTuple(args, "s(iiiiiiiii)", &fmt, &(buf.tm_year), &(buf.tm_mon), &(buf.tm_mday), &(buf.tm_hour), &(buf.tm_min), &(buf.tm_sec), &(buf.tm_wday), &(buf.tm_yday), &(buf.tm_isdst))) return NULL; if (buf.tm_year >= 1900) buf.tm_year -= 1900; buf.tm_mon--; buf.tm_wday = (buf.tm_wday + 1) % 7; buf.tm_yday--; /* I hate these functions that presume you know how big the output * will be ahead of time... */ for (i = 1024 ; i <= 8192 ; i += 1024) { outbuf = malloc(i); if (outbuf == NULL) { return PyErr_NoMemory(); } if (strftime(outbuf, i-1, fmt, &buf) != 0) { PyObject *ret; ret = PyString_FromString(outbuf); free(outbuf); return ret; } free(outbuf); } PyErr_SetString(PyExc_ValueError, "bad strftime format or result too big"); return NULL; } #endif /* HAVE_STRFTIME */ static PyObject * time_asctime(self, args) PyObject *self; PyObject *args; { struct tm buf; char *p; if (!gettmarg(args, &buf)) return NULL; p = asctime(&buf); if (p[24] == '\n') p[24] = '\0'; return PyString_FromString(p); } static PyObject * time_ctime(self, args) PyObject *self; PyObject *args; { double dt; time_t tt; char *p; if (!PyArg_Parse(args, "d", &dt)) return NULL; tt = (time_t)dt; p = ctime(&tt); if (p[24] == '\n') p[24] = '\0'; return PyString_FromString(p); } static PyObject * time_mktime(self, args) PyObject *self; PyObject *args; { struct tm buf; time_t tt; tt = time(&tt); buf = *localtime(&tt); if (!gettmarg(args, &buf)) return NULL; tt = mktime(&buf); if (tt == (time_t)(-1)) { PyErr_SetString(PyExc_OverflowError, "mktime argument out of range"); return NULL; } return PyFloat_FromDouble((double)tt); } static PyMethodDef 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}, #ifdef HAVE_STRFTIME {"strftime", time_strftime, 1}, #endif {NULL, NULL} /* sentinel */ }; static void ins(d, name, v) PyObject *d; char *name; PyObject *v; { if (v == NULL) Py_FatalError("Can't initialize time module -- NULL value"); if (PyDict_SetItemString(d, name, v) != 0) Py_FatalError( "Can't initialize time module -- PyDict_SetItemString failed"); Py_DECREF(v); } void inittime() { PyObject *m, *d; m = Py_InitModule("time", time_methods); d = PyModule_GetDict(m); #ifdef HAVE_TZNAME tzset(); ins(d, "timezone", PyInt_FromLong((long)timezone)); #ifdef HAVE_ALTZONE ins(d, "altzone", PyInt_FromLong((long)altzone)); #else ins(d, "altzone", PyInt_FromLong((long)timezone-3600)); #endif ins(d, "daylight", PyInt_FromLong((long)daylight)); ins(d, "tzname", Py_BuildValue("(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'; ins(d, "timezone", PyInt_FromLong(winterzone)); ins(d, "altzone", PyInt_FromLong(summerzone)); ins(d, "daylight", PyInt_FromLong((long)(winterzone != summerzone))); ins(d, "tzname", Py_BuildValue("(zz)", wintername, summername)); } #else #ifdef macintosh initmactimezone(); ins(d, "timezone", PyInt_FromLong(timezone)); #endif /* macintosh */ #endif /* HAVE_TM_ZONE */ #endif /* !HAVE_TZNAME */ if (PyErr_Occurred()) Py_FatalError("Can't initialize time module"); } /* 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; #ifdef GETTIMEOFDAY_NO_TZ if (gettimeofday(&t) == 0) return (double)t.tv_sec + t.tv_usec*0.000001; #else /* !GETTIMEOFDAY_NO_TZ */ if (gettimeofday(&t, (struct timezone *)NULL) == 0) return (double)t.tv_sec + t.tv_usec*0.000001; #endif /* !GETTIMEOFDAY_NO_TZ */ } #endif /* !HAVE_GETTIMEOFDAY */ { #ifdef HAVE_FTIME struct timeb t; ftime(&t); return (double)t.time + (double)t.millitm * (double)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 #ifdef MPW floatsleep(double secs) #else floatsleep(secs) double secs; #endif /* MPW */ { /* XXX Should test for MS_WIN32 first! */ #ifdef HAVE_SELECT struct timeval t; double frac; frac = fmod(secs, 1.0); secs = floor(secs); t.tv_sec = (long)secs; t.tv_usec = (long)(frac*1000000.0); Py_BEGIN_ALLOW_THREADS if (select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &t) != 0) { Py_BLOCK_THREADS PyErr_SetFromErrno(PyExc_IOError); return -1; } Py_END_ALLOW_THREADS #else /* !HAVE_SELECT */ #ifdef macintosh #define MacTicks (* (long *)0x16A) long deadline; deadline = MacTicks + (long)(secs * 60.0); while (MacTicks < deadline) { /* XXX Should call some yielding function here */ if (PyErr_CheckSignals()) return -1; } #else /* !macintosh */ #ifdef __WATCOMC__ /* XXX Can't interrupt this sleep */ Py_BEGIN_ALLOW_THREADS delay((int)(secs * 1000 + 0.5)); /* delay() uses milliseconds */ Py_END_ALLOW_THREADS #else /* !__WATCOMC__ */ #ifdef MSDOS struct timeb t1, t2; double frac; extern double fmod Py_PROTO((double, double)); extern double floor Py_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 Py_BEGIN_ALLOW_THREADS _wyield(); Py_END_ALLOW_THREADS #endif if (PyErr_CheckSignals()) return -1; ftime(&t1); if (t1.time > t2.time || t1.time == t2.time && t1.millitm >= t2.millitm) break; } #else /* !MSDOS */ #ifdef MS_WIN32 /* XXX Can't interrupt this sleep */ Py_BEGIN_ALLOW_THREADS Sleep((int)(secs*1000)); Py_END_ALLOW_THREADS #else /* !MS_WIN32 */ /* XXX Can't interrupt this sleep */ Py_BEGIN_ALLOW_THREADS sleep((int)secs); Py_END_ALLOW_THREADS #endif /* !MS_WIN32 */ #endif /* !MSDOS */ #endif /* !__WATCOMC__ */ #endif /* !macintosh */ #endif /* !HAVE_SELECT */ return 0; }