| /* Provide access to the last buffer returned by localtime() or gmtime(). |
| |
| Copyright (C) 2001-2003, 2005-2007, 2009-2019 Free Software Foundation, Inc. |
| |
| This program 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, or (at your option) |
| any later version. |
| |
| This program 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 this program; if not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* written by Jim Meyering */ |
| |
| #include <config.h> |
| |
| /* Specification. */ |
| #include "localtime-buffer.h" |
| |
| #if GETTIMEOFDAY_CLOBBERS_LOCALTIME || TZSET_CLOBBERS_LOCALTIME |
| |
| static struct tm tm_zero_buffer; |
| struct tm *localtime_buffer_addr = &tm_zero_buffer; |
| |
| /* This is a wrapper for localtime. |
| |
| On the first call, record the address of the static buffer that |
| localtime uses for its result. */ |
| |
| struct tm * |
| rpl_localtime (time_t const *timep) |
| #undef localtime |
| { |
| struct tm *tm = localtime (timep); |
| |
| if (localtime_buffer_addr == &tm_zero_buffer) |
| localtime_buffer_addr = tm; |
| |
| return tm; |
| } |
| |
| /* Same as above, since gmtime and localtime use the same buffer. */ |
| struct tm * |
| rpl_gmtime (time_t const *timep) |
| #undef gmtime |
| { |
| struct tm *tm = gmtime (timep); |
| |
| if (localtime_buffer_addr == &tm_zero_buffer) |
| localtime_buffer_addr = tm; |
| |
| return tm; |
| } |
| |
| #endif |