| /* Implementation of the DATE_AND_TIME intrinsic. |
| Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. |
| Contributed by Steven Bosscher. |
| |
| This file is part of the GNU Fortran 95 runtime library (libgfortran). |
| |
| Libgfortran 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 of the License, or (at your option) any later version. |
| |
| In addition to the permissions in the GNU General Public License, the |
| Free Software Foundation gives you unlimited permission to link the |
| compiled version of this file into combinations with other programs, |
| and to distribute those combinations without any restriction coming |
| from the use of this file. (The General Public License restrictions |
| do apply in other respects; for example, they cover modification of |
| the file, and distribution when not linked into a combine |
| executable.) |
| |
| Libgfortran 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 libgfortran; see the file COPYING. If not, |
| write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "config.h" |
| #include <sys/types.h> |
| #include <string.h> |
| #include <assert.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "libgfortran.h" |
| |
| #undef HAVE_NO_DATE_TIME |
| #if TIME_WITH_SYS_TIME |
| # include <sys/time.h> |
| # include <time.h> |
| #else |
| # if HAVE_SYS_TIME_H |
| # include <sys/time.h> |
| # else |
| # ifdef HAVE_TIME_H |
| # include <time.h> |
| # else |
| # define HAVE_NO_DATE_TIME |
| # endif /* HAVE_TIME_H */ |
| # endif /* HAVE_SYS_TIME_H */ |
| #endif /* TIME_WITH_SYS_TIME */ |
| |
| #ifndef abs |
| #define abs(x) ((x)>=0 ? (x) : -(x)) |
| #endif |
| |
| /* DATE_AND_TIME ([DATE, TIME, ZONE, VALUES]) |
| |
| Description: Returns data on the real-time clock and date in a form |
| compatible with the representations defined in ISO 8601:1988. |
| |
| Class: Non-elemental subroutine. |
| |
| Arguments: |
| |
| DATE (optional) shall be scalar and of type default character, and |
| shall be of length at least 8 in order to contain the complete |
| value. It is an INTENT(OUT) argument. Its leftmost 8 characters |
| are assigned a value of the form CCYYMMDD, where CC is the century, |
| YY the year within the century, MM the month within the year, and |
| DD the day within the month. If there is no date available, they |
| are assigned blanks. |
| |
| TIME (optional) shall be scalar and of type default character, and |
| shall be of length at least 10 in order to contain the complete |
| value. It is an INTENT(OUT) argument. Its leftmost 10 characters |
| are assigned a value of the form hhmmss.sss, where hh is the hour |
| of the day, mm is the minutes of the hour, and ss.sss is the |
| seconds and milliseconds of the minute. If there is no clock |
| available, they are assigned blanks. |
| |
| ZONE (optional) shall be scalar and of type default character, and |
| shall be of length at least 5 in order to contain the complete |
| value. It is an INTENT(OUT) argument. Its leftmost 5 characters |
| are assigned a value of the form ±hhmm, where hh and mm are the |
| time difference with respect to Coordinated Universal Time (UTC) in |
| hours and parts of an hour expressed in minutes, respectively. If |
| there is no clock available, they are assigned blanks. |
| |
| VALUES (optional) shall be of type default integer and of rank |
| one. It is an INTENT(OUT) argument. Its size shall be at least |
| 8. The values returned in VALUES are as follows: |
| |
| VALUES(1) the year (for example, 2003), or -HUGE(0) if there is |
| no date available; |
| |
| VALUES(2) the month of the year, or -HUGE(0) if there |
| is no date available; |
| |
| VALUES(3) the day of the month, or -HUGE(0) if there is no date |
| available; |
| |
| VALUES(4) the time difference with respect to Coordinated |
| Universal Time (UTC) in minutes, or -HUGE(0) if this information |
| is not available; |
| |
| VALUES(5) the hour of the day, in the range of 0 to 23, or |
| -HUGE(0) if there is no clock; |
| |
| VALUES(6) the minutes of the hour, in the range 0 to 59, or |
| -HUGE(0) if there is no clock; |
| |
| VALUES(7) the seconds of the minute, in the range 0 to 60, or |
| -HUGE(0) if there is no clock; |
| |
| VALUES(8) the milliseconds of the second, in the range 0 to |
| 999, or -HUGE(0) if there is no clock. |
| |
| NULL pointer represent missing OPTIONAL arguments. All arguments |
| have INTENT(OUT). Because of the -i8 option, we must implement |
| VALUES for INTEGER(kind=4) and INTEGER(kind=8). |
| |
| Based on libU77's date_time_.c. |
| |
| TODO : |
| - Check year boundaries. |
| - There is no STDC/POSIX way to get VALUES(8). A GNUish way may |
| be to use ftime. |
| */ |
| #define DATE_LEN 8 |
| #define TIME_LEN 10 |
| #define ZONE_LEN 5 |
| #define VALUES_SIZE 8 |
| |
| extern void date_and_time (char *, char *, char *, gfc_array_i4 *, |
| GFC_INTEGER_4, GFC_INTEGER_4, GFC_INTEGER_4); |
| export_proto(date_and_time); |
| |
| void |
| date_and_time (char *__date, char *__time, char *__zone, |
| gfc_array_i4 *__values, GFC_INTEGER_4 __date_len, |
| GFC_INTEGER_4 __time_len, GFC_INTEGER_4 __zone_len) |
| { |
| int i; |
| char date[DATE_LEN + 1]; |
| char timec[TIME_LEN + 1]; |
| char zone[ZONE_LEN + 1]; |
| GFC_INTEGER_4 values[VALUES_SIZE]; |
| |
| #ifndef HAVE_NO_DATE_TIME |
| time_t lt; |
| struct tm local_time; |
| struct tm UTC_time; |
| |
| lt = time (NULL); |
| |
| if (lt != (time_t) -1) |
| { |
| local_time = *localtime (<); |
| UTC_time = *gmtime (<); |
| |
| /* All arguments can be derived from VALUES. */ |
| values[0] = 1900 + local_time.tm_year; |
| values[1] = 1 + local_time.tm_mon; |
| values[2] = local_time.tm_mday; |
| values[3] = (local_time.tm_min - UTC_time.tm_min + |
| 60 * (local_time.tm_hour - UTC_time.tm_hour + |
| 24 * (local_time.tm_yday - UTC_time.tm_yday))); |
| values[4] = local_time.tm_hour; |
| values[5] = local_time.tm_min; |
| values[6] = local_time.tm_sec; |
| values[7] = 0; |
| |
| #if HAVE_GETTIMEOFDAY |
| { |
| struct timeval tp; |
| # if GETTIMEOFDAY_ONE_ARGUMENT |
| if (!gettimeofday (&tp)) |
| # else |
| # if HAVE_STRUCT_TIMEZONE |
| struct timezone tzp; |
| |
| /* Some systems such as HP-UX, do have struct timezone, but |
| gettimeofday takes void* as the 2nd arg. However, the |
| effect of passing anything other than a null pointer is |
| unspecified on HP-UX. Configure checks if gettimeofday |
| actually fails with a non-NULL arg and pretends that |
| struct timezone is missing if it does fail. */ |
| if (!gettimeofday (&tp, &tzp)) |
| # else |
| if (!gettimeofday (&tp, (void *) 0)) |
| # endif /* HAVE_STRUCT_TIMEZONE */ |
| # endif /* GETTIMEOFDAY_ONE_ARGUMENT */ |
| values[7] = tp.tv_usec / 1000; |
| } |
| #endif /* HAVE_GETTIMEOFDAY */ |
| |
| #if HAVE_SNPRINTF |
| if (__date) |
| snprintf (date, DATE_LEN + 1, "%04d%02d%02d", |
| values[0], values[1], values[2]); |
| if (__time) |
| snprintf (timec, TIME_LEN + 1, "%02d%02d%02d.%03d", |
| values[4], values[5], values[6], values[7]); |
| |
| if (__zone) |
| snprintf (zone, ZONE_LEN + 1, "%+03d%02d", |
| values[3] / 60, abs (values[3] % 60)); |
| #else |
| if (__date) |
| sprintf (date, "%04d%02d%02d", values[0], values[1], values[2]); |
| |
| if (__time) |
| sprintf (timec, "%02d%02d%02d.%03d", |
| values[4], values[5], values[6], values[7]); |
| |
| if (__zone) |
| sprintf (zone, "%+03d%02d", |
| values[3] / 60, abs (values[3] % 60)); |
| #endif |
| } |
| else |
| { |
| memset (date, ' ', DATE_LEN); |
| date[DATE_LEN] = '\0'; |
| |
| memset (timec, ' ', TIME_LEN); |
| timec[TIME_LEN] = '\0'; |
| |
| memset (zone, ' ', ZONE_LEN); |
| zone[ZONE_LEN] = '\0'; |
| |
| for (i = 0; i < VALUES_SIZE; i++) |
| values[i] = - GFC_INTEGER_4_HUGE; |
| } |
| #else /* if defined HAVE_NO_DATE_TIME */ |
| /* We really have *nothing* to return, so return blanks and HUGE(0). */ |
| |
| memset (date, ' ', DATE_LEN); |
| date[DATE_LEN] = '\0'; |
| |
| memset (timec, ' ', TIME_LEN); |
| timec[TIME_LEN] = '\0'; |
| |
| memset (zone, ' ', ZONE_LEN); |
| zone[ZONE_LEN] = '\0'; |
| |
| for (i = 0; i < VALUES_SIZE; i++) |
| values[i] = - GFC_INTEGER_4_HUGE; |
| #endif /* HAVE_NO_DATE_TIME */ |
| |
| /* Copy the values into the arguments. */ |
| if (__values) |
| { |
| size_t len, delta, elt_size; |
| |
| elt_size = GFC_DESCRIPTOR_SIZE (__values); |
| len = __values->dim[0].ubound + 1 - __values->dim[0].lbound; |
| delta = __values->dim[0].stride; |
| if (delta == 0) |
| delta = 1; |
| |
| assert (len >= VALUES_SIZE); |
| /* Cope with different type kinds. */ |
| if (elt_size == 4) |
| { |
| GFC_INTEGER_4 *vptr4 = __values->data; |
| |
| for (i = 0; i < VALUES_SIZE; i++, vptr4 += delta) |
| *vptr4 = values[i]; |
| } |
| else if (elt_size == 8) |
| { |
| GFC_INTEGER_8 *vptr8 = (GFC_INTEGER_8 *)__values->data; |
| |
| for (i = 0; i < VALUES_SIZE; i++, vptr8 += delta) |
| { |
| if (values[i] == - GFC_INTEGER_4_HUGE) |
| *vptr8 = - GFC_INTEGER_8_HUGE; |
| else |
| *vptr8 = values[i]; |
| } |
| } |
| else |
| abort (); |
| } |
| |
| if (__zone) |
| { |
| assert (__zone_len >= ZONE_LEN); |
| fstrcpy (__zone, ZONE_LEN, zone, ZONE_LEN); |
| } |
| |
| if (__time) |
| { |
| assert (__time_len >= TIME_LEN); |
| fstrcpy (__time, TIME_LEN, timec, TIME_LEN); |
| } |
| |
| if (__date) |
| { |
| assert (__date_len >= DATE_LEN); |
| fstrcpy (__date, DATE_LEN, date, DATE_LEN); |
| } |
| } |
