1 /* Reentrant time functions like localtime_r. 2 3 Copyright (C) 2003 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2, or (at your option) 8 any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License along 16 with this program; if not, write to the Free Software Foundation, 17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 18 #include <sys/cdefs.h> 19 __RCSID("$NetBSD: time_r.c,v 1.2 2016/05/17 14:00:09 christos Exp $"); 20 21 22 /* Written by Paul Eggert. */ 23 24 #ifdef HAVE_CONFIG_H 25 # include <config.h> 26 #endif 27 28 #include "time_r.h" 29 30 #include <string.h> 31 32 static char * 33 copy_string_result (char *dest, char const *src) 34 { 35 if (! src) 36 return 0; 37 return strcpy (dest, src); 38 } 39 40 static struct tm * 41 copy_tm_result (struct tm *dest, struct tm const *src) 42 { 43 if (! src) 44 return 0; 45 *dest = *src; 46 return dest; 47 } 48 49 50 char * 51 asctime_r (struct tm const * restrict tm, char * restrict buf) 52 { 53 return copy_string_result (buf, asctime (tm)); 54 } 55 56 char * 57 ctime_r (time_t const *t, char *buf) 58 { 59 return copy_string_result (buf, ctime (t)); 60 } 61 62 struct tm * 63 gmtime_r (time_t const * restrict t, struct tm * restrict tp) 64 { 65 return copy_tm_result (tp, gmtime (t)); 66 } 67 68 struct tm * 69 localtime_r (time_t const * restrict t, struct tm * restrict tp) 70 { 71 return copy_tm_result (tp, localtime (t)); 72 } 73