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-rw-r--r--lib/strftime.h25
1 files changed, 15 insertions, 10 deletions
diff --git a/lib/strftime.h b/lib/strftime.h
index 9d91e5139cd..a9847084f01 100644
--- a/lib/strftime.h
+++ b/lib/strftime.h
@@ -1,18 +1,18 @@
/* declarations for strftime.c
- Copyright (C) 2002, 2004, 2008-2017 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2004, 2008-2022 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 of the License, or
- (at your option) any later version.
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation, either version 3 of the
+ License, or (at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ This file 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.
+ GNU Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <time.h>
@@ -24,8 +24,13 @@ extern "C" {
/* Just like strftime, but with two more arguments:
POSIX requires that strftime use the local timezone information.
Use the timezone __TZ instead. Use __NS as the number of
- nanoseconds in the %N directive. */
-size_t nstrftime (char *, size_t, char const *, struct tm const *,
+ nanoseconds in the %N directive.
+
+ On error, set errno and return 0. Otherwise, return the number of
+ bytes generated (not counting the trailing NUL), preserving errno
+ if the number is 0. This errno behavior is in draft POSIX 202x
+ plus some requested changes to POSIX. */
+size_t nstrftime (char *restrict, size_t, char const *, struct tm const *,
timezone_t __tz, int __ns);
#ifdef __cplusplus