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Diffstat (limited to 'libgfortran/intrinsics/ctime.c')
| -rw-r--r-- | libgfortran/intrinsics/ctime.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/libgfortran/intrinsics/ctime.c b/libgfortran/intrinsics/ctime.c new file mode 100644 index 000000000..92c043135 --- /dev/null +++ b/libgfortran/intrinsics/ctime.c @@ -0,0 +1,129 @@ +/* Implementation of the CTIME and FDATE g77 intrinsics. + Copyright (C) 2005, 2007, 2009, 2011 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> + + +/* strftime-like function that fills a C string with %c format which + is identical to ctime in the default locale. As ctime and ctime_r + are poorly specified and their usage not recommended, the + implementation instead uses strftime. */ + +static size_t +strctime (char *s, size_t max, const time_t *timep) +{ +#ifdef HAVE_STRFTIME + struct tm ltm; + int failed; + /* 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 (timep, <m)) + == 5, + failed = localtime_r (timep, <m) == NULL, + failed = localtime_r (timep, <m) != 0); + if (failed) + return 0; + return strftime (s, max, "%c", <m); +#else + return 0; +#endif +} + +/* In the default locale, the date and time representation fits in 26 + bytes. However, other locales might need more space. */ +#define CSZ 100 + +extern void fdate (char **, gfc_charlen_type *); +export_proto(fdate); + +void +fdate (char ** date, gfc_charlen_type * date_len) +{ +#if defined(HAVE_TIME) + time_t now = time(NULL); + *date = get_mem (CSZ); + *date_len = strctime (*date, CSZ, &now); +#else + + *date = NULL; + *date_len = 0; +#endif +} + + +extern void fdate_sub (char *, gfc_charlen_type); +export_proto(fdate_sub); + +void +fdate_sub (char * date, gfc_charlen_type date_len) +{ +#if defined(HAVE_TIME) + time_t now = time(NULL); + char *s = get_mem (date_len + 1); + size_t n = strctime (s, date_len + 1, &now); + fstrcpy (date, date_len, s, n); + free (s); +#else + memset (date, ' ', date_len); +#endif +} + + + +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) +{ +#if defined(HAVE_TIME) + time_t now = t; + *date = get_mem (CSZ); + *date_len = strctime (*date, CSZ, &now); +#else + + *date = NULL; + *date_len = 0; +#endif +} + + +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; + char *s = get_mem (date_len + 1); + size_t n = strctime (s, date_len + 1, &now); + fstrcpy (date, date_len, s, n); + free (s); +} |