Mercurial > hg > octave-nkf
view liboctave/oct-time.cc @ 5915:b2e1be30c8e9 ss-2-9-7
[project @ 2006-07-28 18:08:56 by jwe]
author | jwe |
---|---|
date | Fri, 28 Jul 2006 18:08:56 +0000 |
parents | c5f6623514c4 |
children | 2dc8e7f1ee1e |
line wrap: on
line source
/* Copyright (C) 1999 John W. Eaton This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <climits> #include <cmath> #ifdef HAVE_UNISTD_H #ifdef HAVE_SYS_TYPES_H #include <sys/types.h> #endif #include <unistd.h> #endif #if defined (OCTAVE_USE_WINDOWS_API) #include <windows.h> #endif #include "lo-error.h" #include "lo-utils.h" #include "oct-time.h" octave_time::octave_time (const octave_base_tm& tm) { struct tm t; t.tm_sec = tm.sec (); t.tm_min = tm.min (); t.tm_hour = tm.hour (); t.tm_mday = tm.mday (); t.tm_mon = tm.mon (); t.tm_year = tm.year (); t.tm_wday = tm.wday (); t.tm_yday = tm.yday (); t.tm_isdst = tm.isdst (); #if defined (HAVE_STRUCT_TM_TM_ZONE) std::string s = tm.zone (); char *ps = strsave (s.c_str ()); t.tm_zone = ps; #endif ot_unix_time = mktime (&t); #if defined (HAVE_STRUCT_TM_TM_ZONE) delete [] ps; #endif ot_usec = tm.usec (); } std::string octave_time::ctime (void) const { return octave_localtime (*this) . asctime (); } void octave_time::stamp (void) { #if defined (HAVE_GETTIMEOFDAY) struct timeval tp; #if defined (GETTIMEOFDAY_NO_TZ) gettimeofday (&tp); #else gettimeofday (&tp, 0); #endif ot_unix_time = tp.tv_sec; ot_usec = tp.tv_usec; #elif defined (OCTAVE_USE_WINDOWS_API) // Loosely based on the code from Cygwin // Copyright 1996-2002 Red Hat, Inc. // Licenced under the GPL. const LONGLONG TIME_OFFSET = 0x19db1ded53e8000LL; static int init = 1; static LARGE_INTEGER base; static LARGE_INTEGER t0; static double dt; if (init) { LARGE_INTEGER ifreq; if (QueryPerformanceFrequency (&ifreq)) { // Get clock frequency dt = (double) 1000000.0 / (double) ifreq.QuadPart; // Get base time as microseconds from Jan 1. 1970 int priority = GetThreadPriority (GetCurrentThread ()); SetThreadPriority (GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL); if (QueryPerformanceCounter (&base)) { FILETIME f; GetSystemTimeAsFileTime (&f); t0.HighPart = f.dwHighDateTime; t0.LowPart = f.dwLowDateTime; t0.QuadPart -= TIME_OFFSET; t0.QuadPart /= 10; init = 0; } SetThreadPriority (GetCurrentThread (), priority); } if (! init) { ot_unix_time = time (0); ot_usec = 0; return; } } LARGE_INTEGER now; if (QueryPerformanceCounter (&now)) { now.QuadPart = (LONGLONG) (dt * (double)(now.QuadPart - base.QuadPart)); now.QuadPart += t0.QuadPart; ot_unix_time = now.QuadPart / 1000000LL; ot_usec = now.QuadPart % 1000000LL; } else { ot_unix_time = time (0); ot_usec = 0; } #else ot_unix_time = time (0); #endif } // From the mktime() manual page: // // The mktime() function converts a broken-down time structure, // expressed as local time, to calendar time representation. // // <snip> // // If structure members are outside their legal interval, they // will be normalized (so that, e.g., 40 October is changed into // 9 November). // // So, we no longer check limits here. #if 0 #define DEFINE_SET_INT_FIELD_FCN(f, lo, hi) \ octave_base_tm& \ octave_base_tm::f (int v) \ { \ if (v < lo || v > hi) \ (*current_liboctave_error_handler) \ ("invalid value specified for " #f); \ \ tm_ ## f = v; \ \ return *this; \ } #else #define DEFINE_SET_INT_FIELD_FCN(f, lo, hi) \ octave_base_tm& \ octave_base_tm::f (int v) \ { \ tm_ ## f = v; \ \ return *this; \ } #endif DEFINE_SET_INT_FIELD_FCN (usec, 0, 1000000) DEFINE_SET_INT_FIELD_FCN (sec, 0, 61) DEFINE_SET_INT_FIELD_FCN (min, 0, 59) DEFINE_SET_INT_FIELD_FCN (hour, 0, 23) DEFINE_SET_INT_FIELD_FCN (mday, 1, 31) DEFINE_SET_INT_FIELD_FCN (mon, 0, 11) DEFINE_SET_INT_FIELD_FCN (year, INT_MIN, INT_MAX) DEFINE_SET_INT_FIELD_FCN (wday, 0, 6) DEFINE_SET_INT_FIELD_FCN (yday, 0, 365) DEFINE_SET_INT_FIELD_FCN (isdst, 0, 1) octave_base_tm& octave_base_tm::zone (const std::string& s) { tm_zone = s; return *this; } #if !defined STRFTIME_BUF_INITIAL_SIZE #define STRFTIME_BUF_INITIAL_SIZE 128 #endif std::string octave_base_tm::strftime (const std::string& fmt) const { std::string retval; if (! fmt.empty ()) { struct tm t; t.tm_sec = tm_sec; t.tm_min = tm_min; t.tm_hour = tm_hour; t.tm_mday = tm_mday; t.tm_mon = tm_mon; t.tm_year = tm_year; t.tm_wday = tm_wday; t.tm_yday = tm_yday; t.tm_isdst = tm_isdst; #if defined (HAVE_STRUCT_TM_TM_ZONE) char *ps = strsave (tm_zone.c_str ()); t.tm_zone = ps; #endif const char *fmt_str = fmt.c_str (); char *buf = 0; size_t bufsize = STRFTIME_BUF_INITIAL_SIZE; size_t chars_written = 0; while (chars_written == 0) { delete [] buf; buf = new char[bufsize]; buf[0] = '\0'; chars_written = ::strftime (buf, bufsize, fmt_str, &t); bufsize *= 2; } #if defined (HAVE_STRUCT_TM_TM_ZONE) delete [] ps; #endif retval = buf; delete [] buf; } return retval; } void octave_base_tm::init (void *p) { struct tm *t = static_cast<struct tm*> (p); tm_sec = t->tm_sec; tm_min = t->tm_min; tm_hour = t->tm_hour; tm_mday = t->tm_mday; tm_mon = t->tm_mon; tm_year = t->tm_year; tm_wday = t->tm_wday; tm_yday = t->tm_yday; tm_isdst = t->tm_isdst; #if defined (HAVE_STRUCT_TM_TM_ZONE) tm_zone = t->tm_zone; #elif defined (HAVE_TZNAME) if (t->tm_isdst == 0 || t->tm_isdst == 1) tm_zone = tzname[t->tm_isdst]; #endif } void octave_localtime::init (const octave_time& ot) { tm_usec = ot.usec (); time_t t = ot; octave_base_tm::init (localtime (&t)); } void octave_gmtime::init (const octave_time& ot) { tm_usec = ot.usec (); time_t t = ot; octave_base_tm::init (gmtime (&t)); } void octave_strptime::init (const std::string& str, const std::string& fmt) { struct tm t; t.tm_sec = 0; t.tm_min = 0; t.tm_hour = 0; t.tm_mday = 0; t.tm_mon = 0; t.tm_year = 0; t.tm_wday = 0; t.tm_yday = 0; t.tm_isdst = 0; #if defined (HAVE_STRUCT_TM_TM_ZONE) char *ps = strsave (""); t.tm_zone = ps; #endif char *p = strsave (str.c_str ()); char *q = oct_strptime (p, fmt.c_str (), &t); if (q) nchars = q - p + 1; else nchars = 0; delete [] p; octave_base_tm::init (&t); #if defined (HAVE_STRUCT_TM_TM_ZONE) delete ps; #endif } /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */