126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/* Implementation of the CTIME and FDATE g77 intrinsics.
|
|
Copyright (C) 2005-2018 Free Software Foundation, Inc.
|
|
Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
|
|
|
|
This file is part of the GNU Fortran 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 3 of the License, or (at your option) any later version.
|
|
|
|
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.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include "libgfortran.h"
|
|
|
|
#include "time_1.h"
|
|
|
|
#include <string.h>
|
|
|
|
|
|
/* Maximum space a ctime-like string might need. A "normal" ctime
|
|
string is 26 bytes, and in our case 24 bytes as we don't include
|
|
the trailing newline and null. However, the longest possible year
|
|
number is -2,147,481,748 (1900 - 2,147,483,648, since tm_year is a
|
|
32-bit signed integer) so an extra 7 bytes are needed. */
|
|
#define CTIME_BUFSZ 31
|
|
|
|
|
|
/* Thread-safe ctime-like function that fills a Fortran
|
|
string. ctime_r is a portability headache and marked as obsolescent
|
|
in POSIX 2008, which recommends strftime in its place. However,
|
|
strftime(..., "%c",...) doesn't produce ctime-like output on
|
|
MinGW, so do it manually with snprintf. */
|
|
|
|
static int
|
|
gf_ctime (char *s, size_t max, const time_t timev)
|
|
{
|
|
struct tm ltm;
|
|
int failed;
|
|
char buf[CTIME_BUFSZ + 1];
|
|
/* Some targets provide a localtime_r based on a draft of the POSIX
|
|
standard where the return type is int rather than the
|
|
standardized struct tm*. */
|
|
__builtin_choose_expr (__builtin_classify_type (localtime_r (&timev, <m))
|
|
== 5,
|
|
failed = localtime_r (&timev, <m) == NULL,
|
|
failed = localtime_r (&timev, <m) != 0);
|
|
if (failed)
|
|
goto blank;
|
|
int n = snprintf (buf, sizeof (buf),
|
|
"%3.3s %3.3s%3d %.2d:%.2d:%.2d %d",
|
|
"SunMonTueWedThuFriSat" + ltm.tm_wday * 3,
|
|
"JanFebMarAprMayJunJulAugSepOctNovDec" + ltm.tm_mon * 3,
|
|
ltm.tm_mday, ltm.tm_hour, ltm.tm_min, ltm.tm_sec,
|
|
1900 + ltm.tm_year);
|
|
if (n < 0)
|
|
goto blank;
|
|
if ((size_t) n <= max)
|
|
{
|
|
cf_strcpy (s, max, buf);
|
|
return n;
|
|
}
|
|
blank:
|
|
memset (s, ' ', max);
|
|
return 0;
|
|
}
|
|
|
|
|
|
extern void fdate (char **, gfc_charlen_type *);
|
|
export_proto(fdate);
|
|
|
|
void
|
|
fdate (char ** date, gfc_charlen_type * date_len)
|
|
{
|
|
time_t now = time(NULL);
|
|
*date = xmalloc (CTIME_BUFSZ);
|
|
*date_len = gf_ctime (*date, CTIME_BUFSZ, now);
|
|
}
|
|
|
|
|
|
extern void fdate_sub (char *, gfc_charlen_type);
|
|
export_proto(fdate_sub);
|
|
|
|
void
|
|
fdate_sub (char * date, gfc_charlen_type date_len)
|
|
{
|
|
time_t now = time(NULL);
|
|
gf_ctime (date, date_len, now);
|
|
}
|
|
|
|
|
|
|
|
extern void PREFIX(ctime) (char **, gfc_charlen_type *, GFC_INTEGER_8);
|
|
export_proto_np(PREFIX(ctime));
|
|
|
|
void
|
|
PREFIX(ctime) (char ** date, gfc_charlen_type * date_len, GFC_INTEGER_8 t)
|
|
{
|
|
time_t now = t;
|
|
*date = xmalloc (CTIME_BUFSZ);
|
|
*date_len = gf_ctime (*date, CTIME_BUFSZ, now);
|
|
}
|
|
|
|
|
|
extern void ctime_sub (GFC_INTEGER_8 *, char *, gfc_charlen_type);
|
|
export_proto(ctime_sub);
|
|
|
|
void
|
|
ctime_sub (GFC_INTEGER_8 * t, char * date, gfc_charlen_type date_len)
|
|
{
|
|
time_t now = *t;
|
|
gf_ctime (date, date_len, now);
|
|
}
|