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 19 /* Written by Paul Eggert. */ 20 21 #ifdef HAVE_CONFIG_H 22 # include <config.h> 23 #endif 24 25 #include "time_r.h" 26 27 #include <string.h> 28 29 static char * 30 copy_string_result (char *dest, char const *src) 31 { 32 if (! src) 33 return 0; 34 return strcpy (dest, src); 35 } 36 37 static struct tm * 38 copy_tm_result (struct tm *dest, struct tm const *src) 39 { 40 if (! src) 41 return 0; 42 *dest = *src; 43 return dest; 44 } 45 46 47 char * 48 asctime_r (struct tm const * restrict tm, char * restrict buf) 49 { 50 return copy_string_result (buf, asctime (tm)); 51 } 52 53 char * 54 ctime_r (time_t const *t, char *buf) 55 { 56 return copy_string_result (buf, ctime (t)); 57 } 58 59 struct tm * 60 gmtime_r (time_t const * restrict t, struct tm * restrict tp) 61 { 62 return copy_tm_result (tp, gmtime (t)); 63 } 64 65 struct tm * 66 localtime_r (time_t const * restrict t, struct tm * restrict tp) 67 { 68 return copy_tm_result (tp, localtime (t)); 69 } 70