mirror of
https://github.com/python/cpython
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8607ae2e57
to inside floatsleep(). This is necessary because floatsleep() does the error handling and it must have grabbed the interpreter lock and thread state before it can do so.
602 lines
14 KiB
C
602 lines
14 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 "Python.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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#ifndef MS_WINDOWS
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extern int ftime();
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#endif /* MS_WINDOWS */
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#endif /* HAVE_FTIME */
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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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#ifdef MS_WIN32
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/* Win32 has better clock replacement */
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#include <largeint.h>
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#undef HAVE_CLOCK /* We have our own version down below */
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#endif /* MS_WIN32 */
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/* Forward declarations */
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static int floatsleep Py_PROTO((double));
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static double floattime Py_PROTO(());
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#ifdef macintosh
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/* Our own timezone. We have enough information to deduce whether
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** DST is on currently, but unfortunately we cannot put it to good
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** use because we don't know the rules (and that is needed to have
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** localtime() return correct tm_isdst values for times other than
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** the current time. So, we cop out and only tell the user the current
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** timezone.
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*/
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static long timezone;
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static void
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initmactimezone()
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{
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MachineLocation loc;
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long delta;
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ReadLocation(&loc);
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if (loc.latitude == 0 && loc.longitude == 0 && loc.u.gmtDelta == 0)
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return;
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delta = loc.u.gmtDelta & 0x00FFFFFF;
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if (delta & 0x00800000)
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delta |= 0xFF000000;
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timezone = -delta;
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}
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#endif /* macintosh */
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static PyObject *
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time_time(self, args)
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PyObject *self;
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PyObject *args;
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{
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double secs;
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if (!PyArg_NoArgs(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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PyErr_SetFromErrno(PyExc_IOError);
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return NULL;
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}
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return PyFloat_FromDouble(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 PyObject *
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time_clock(self, args)
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PyObject *self;
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PyObject *args;
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{
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if (!PyArg_NoArgs(args))
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return NULL;
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return PyFloat_FromDouble(((double)clock()) / CLOCKS_PER_SEC);
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}
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#endif /* HAVE_CLOCK */
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#ifdef MS_WIN32
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/* Due to Mark Hammond */
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static PyObject *
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time_clock(self, args)
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PyObject *self;
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PyObject *args;
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{
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static LARGE_INTEGER ctrStart;
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static LARGE_INTEGER divisor = {0,0};
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LARGE_INTEGER now, diff, rem;
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if (!PyArg_NoArgs(args))
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return NULL;
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if (LargeIntegerEqualToZero(divisor)) {
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QueryPerformanceCounter(&ctrStart);
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if (!QueryPerformanceFrequency(&divisor) ||
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LargeIntegerEqualToZero(divisor)) {
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/* Unlikely to happen -
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this works on all intel machines at least!
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Revert to clock() */
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return PyFloat_FromDouble(clock());
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}
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}
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QueryPerformanceCounter(&now);
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diff = LargeIntegerSubtract(now, ctrStart);
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diff = LargeIntegerDivide(diff, divisor, &rem);
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/* XXX - we assume both divide results fit in 32 bits. This is
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true on Intels. First person who can afford a machine that
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doesnt deserves to fix it :-)
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*/
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return PyFloat_FromDouble((double)diff.LowPart +
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((double)rem.LowPart / (double)divisor.LowPart));
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}
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#define HAVE_CLOCK /* So it gets included in the methods */
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#endif /* MS_WIN32 */
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static PyObject *
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time_sleep(self, args)
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PyObject *self;
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PyObject *args;
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{
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double secs;
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if (!PyArg_Parse(args, "d", &secs))
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return NULL;
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if (floatsleep(secs) != 0)
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return NULL;
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyObject *
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time_convert(when, function)
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time_t when;
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struct tm * (*function) Py_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 PyErr_SetFromErrno(PyExc_IOError);
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}
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return Py_BuildValue("(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 PyObject *
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time_gmtime(self, args)
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PyObject *self;
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PyObject *args;
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{
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double when;
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if (!PyArg_Parse(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 PyObject *
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time_localtime(self, args)
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PyObject *self;
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PyObject *args;
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{
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double when;
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if (!PyArg_Parse(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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PyObject *args;
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struct tm *p;
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{
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if (!PyArg_Parse(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 PyObject *
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time_strftime(self, args)
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PyObject *self;
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PyObject *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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*/
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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 PyErr_NoMemory();
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}
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if (strftime(outbuf, i-1, fmt, &buf) != 0) {
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PyObject *ret;
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ret = PyString_FromString(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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PyErr_SetString(PyExc_ValueError,
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"bad strftime format or result too big");
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return NULL;
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}
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#endif /* HAVE_STRFTIME */
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static PyObject *
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time_asctime(self, args)
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PyObject *self;
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PyObject *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 PyString_FromString(p);
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}
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static PyObject *
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time_ctime(self, args)
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PyObject *self;
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PyObject *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 (!PyArg_Parse(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 PyString_FromString(p);
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}
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static PyObject *
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time_mktime(self, args)
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PyObject *self;
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PyObject *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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PyErr_SetString(PyExc_OverflowError,
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"mktime argument out of range");
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return NULL;
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}
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return PyFloat_FromDouble((double)tt);
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}
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static PyMethodDef 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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PyObject *d;
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char *name;
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PyObject *v;
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{
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if (v == NULL)
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Py_FatalError("Can't initialize time module -- NULL value");
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if (PyDict_SetItemString(d, name, v) != 0)
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Py_FatalError(
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"Can't initialize time module -- PyDict_SetItemString failed");
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Py_DECREF(v);
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}
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void
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inittime()
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{
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PyObject *m, *d;
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m = Py_InitModule("time", time_methods);
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d = PyModule_GetDict(m);
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#ifdef HAVE_TZNAME
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tzset();
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ins(d, "timezone", PyInt_FromLong((long)timezone));
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#ifdef HAVE_ALTZONE
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ins(d, "altzone", PyInt_FromLong((long)altzone));
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#else
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ins(d, "altzone", PyInt_FromLong((long)timezone-3600));
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#endif
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ins(d, "daylight", PyInt_FromLong((long)daylight));
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ins(d, "tzname", Py_BuildValue("(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", PyInt_FromLong(winterzone));
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ins(d, "altzone", PyInt_FromLong(summerzone));
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ins(d, "daylight",
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PyInt_FromLong((long)(winterzone != summerzone)));
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ins(d, "tzname",
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Py_BuildValue("(zz)", wintername, summername));
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}
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#else
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#ifdef macintosh
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initmactimezone();
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ins(d, "timezone", PyInt_FromLong(timezone));
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#endif /* macintosh */
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#endif /* HAVE_TM_ZONE */
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#endif /* !HAVE_TZNAME */
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if (PyErr_Occurred())
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Py_FatalError("Can't initialize time module");
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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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/* XXX Should test for MS_WIN32 first! */
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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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Py_BEGIN_ALLOW_THREADS
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if (select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &t) != 0) {
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Py_BLOCK_THREADS
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PyErr_SetFromErrno(PyExc_IOError);
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return -1;
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}
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Py_END_ALLOW_THREADS
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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) {
|
|
/* 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;
|
|
}
|