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| author | Stefan Monnier <monnier@iro.umontreal.ca> | 2022-09-25 16:15:16 -0400 |
|---|---|---|
| committer | Stefan Monnier <monnier@iro.umontreal.ca> | 2022-09-25 16:15:16 -0400 |
| commit | 650c20f1ca4e07591a727e1cfcc74b3363d15985 (patch) | |
| tree | 85d11f6437cde22f410c25e0e5f71a3131ebd07d /lib/strnlen.c | |
| parent | 8869332684c2302b5ba1ead4568bbc7ba1c0183e (diff) | |
| parent | 4b85ae6a24380fb67a3315eaec9233f17a872473 (diff) | |
| download | emacs-650c20f1ca4e07591a727e1cfcc74b3363d15985.tar.gz emacs-650c20f1ca4e07591a727e1cfcc74b3363d15985.tar.bz2 emacs-650c20f1ca4e07591a727e1cfcc74b3363d15985.zip | |
Merge 'master' into noverlay
Diffstat (limited to 'lib/strnlen.c')
| -rw-r--r-- | lib/strnlen.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/strnlen.c b/lib/strnlen.c new file mode 100644 index 00000000000..c8fc69c6a9c --- /dev/null +++ b/lib/strnlen.c @@ -0,0 +1,30 @@ +/* Find the length of STRING, but scan at most MAXLEN characters. + Copyright (C) 2005-2007, 2009-2022 Free Software Foundation, Inc. + Written by Simon Josefsson. + + 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 2.1 of the + License, or (at your option) any later version. + + 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 Lesser General Public License for more details. + + 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 <config.h> + +#include <string.h> + +/* Find the length of STRING, but scan at most MAXLEN characters. + If no '\0' terminator is found in that many characters, return MAXLEN. */ + +size_t +strnlen (const char *string, size_t maxlen) +{ + const char *end = memchr (string, '\0', maxlen); + return end ? (size_t) (end - string) : maxlen; +} |