Add strnlen() to local C library
This code has been imported and slightly adapted from FreeBSD:
6253393ad8/lib/libc/string/strnlen.c
Change-Id: Ie5ef5f92e6e904adb88f8628077fdf1d27470eb3
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
This commit is contained in:
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f38d93fdbf
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@ -31,7 +31,7 @@
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*/
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*/
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/*
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/*
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* Portions copyright (c) 2013-2014, ARM Limited and Contributors.
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* Portions copyright (c) 2013-2017, ARM Limited and Contributors.
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* All rights reserved.
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* All rights reserved.
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*/
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*/
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@ -59,6 +59,7 @@ char *strchr(const char *, int) __pure;
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int strcmp(const char *, const char *) __pure;
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int strcmp(const char *, const char *) __pure;
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size_t strlen(const char *) __pure;
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size_t strlen(const char *) __pure;
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int strncmp(const char *, const char *, size_t) __pure;
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int strncmp(const char *, const char *, size_t) __pure;
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size_t strnlen(const char *, size_t) __pure;
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int strcasecmp(const char *, const char *);
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int strcasecmp(const char *, const char *);
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__END_DECLS
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__END_DECLS
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@ -1,5 +1,5 @@
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#
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#
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# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
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# Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
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#
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#
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# Redistribution and use in source and binary forms, with or without
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# modification, are permitted provided that the following conditions are met:
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@ -41,6 +41,7 @@ STDLIB_SRCS := $(addprefix lib/stdlib/, \
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strcmp.c \
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strcmp.c \
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strlen.c \
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strlen.c \
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strncmp.c \
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strncmp.c \
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strnlen.c \
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subr_prf.c)
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subr_prf.c)
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INCLUDES += -Iinclude/lib/stdlib \
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INCLUDES += -Iinclude/lib/stdlib \
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@ -0,0 +1,45 @@
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/*-
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* Copyright (c) 2009 David Schultz <das@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Portions copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
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*/
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#include <sys/cdefs.h>
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#include <string.h>
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size_t
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strnlen(const char *s, size_t maxlen)
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{
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size_t len;
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for (len = 0; len < maxlen; len++, s++) {
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if (!*s)
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break;
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}
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return (len);
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}
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