diff options
author | Sandrine Bailleux <sandrine.bailleux@arm.com> | 2017-01-24 10:18:01 +0000 |
---|---|---|
committer | Sandrine Bailleux <sandrine.bailleux@arm.com> | 2017-01-24 10:28:41 +0000 |
commit | d67879d311c63fde5a7b1ba4d40c710f86da1153 (patch) | |
tree | bba9ef378ca2f73ef7319457b61d64ed571c0705 /lib/stdlib | |
parent | f38d93fdbf82ebec321c70f7bc15fe12b7d57275 (diff) |
Add strnlen() to local C library
This code has been imported and slightly adapted from FreeBSD:
https://github.com/freebsd/freebsd/blob/6253393ad8df55730481bf2aafd76bdd6182e2f5/lib/libc/string/strnlen.c
Change-Id: Ie5ef5f92e6e904adb88f8628077fdf1d27470eb3
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Diffstat (limited to 'lib/stdlib')
-rw-r--r-- | lib/stdlib/stdlib.mk | 3 | ||||
-rw-r--r-- | lib/stdlib/strnlen.c | 45 |
2 files changed, 47 insertions, 1 deletions
diff --git a/lib/stdlib/stdlib.mk b/lib/stdlib/stdlib.mk index cdf3d293..4ff405fb 100644 --- a/lib/stdlib/stdlib.mk +++ b/lib/stdlib/stdlib.mk @@ -1,5 +1,5 @@ # -# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. +# Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are met: @@ -41,6 +41,7 @@ STDLIB_SRCS := $(addprefix lib/stdlib/, \ strcmp.c \ strlen.c \ strncmp.c \ + strnlen.c \ subr_prf.c) INCLUDES += -Iinclude/lib/stdlib \ diff --git a/lib/stdlib/strnlen.c b/lib/stdlib/strnlen.c new file mode 100644 index 00000000..d48502bd --- /dev/null +++ b/lib/stdlib/strnlen.c @@ -0,0 +1,45 @@ +/*- + * Copyright (c) 2009 David Schultz <das@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Portions copyright (c) 2017, ARM Limited and Contributors. All rights reserved. + */ + +#include <sys/cdefs.h> + +#include <string.h> + +size_t +strnlen(const char *s, size_t maxlen) +{ + size_t len; + + for (len = 0; len < maxlen; len++, s++) { + if (!*s) + break; + } + return (len); +} |