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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2010-10-27 20:54:11 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2010-10-27 20:54:11 +0000 |
commit | 96a45c67960e9bac5562508fe8fd63738e7943c8 (patch) | |
tree | 937d5aea38c237e336caeb1d7bc2926989848c2e /nuttx/lib/lib_strnlen.c | |
parent | 665c4bf764eb07e58e70393c08671a2dfcd834bb (diff) | |
download | px4-nuttx-96a45c67960e9bac5562508fe8fd63738e7943c8.tar.gz px4-nuttx-96a45c67960e9bac5562508fe8fd63738e7943c8.tar.bz2 px4-nuttx-96a45c67960e9bac5562508fe8fd63738e7943c8.zip |
Add strnlen()
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3054 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/lib/lib_strnlen.c')
-rw-r--r-- | nuttx/lib/lib_strnlen.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/nuttx/lib/lib_strnlen.c b/nuttx/lib/lib_strnlen.c new file mode 100644 index 000000000..f6624a64f --- /dev/null +++ b/nuttx/lib/lib_strnlen.c @@ -0,0 +1,62 @@ +/**************************************************************************** + * lib/lib_strnlen.c + * + * This file is part of NuttX, contributed by Michael Hrabanek + * + * Copyright (C) 2010 Gregory Nutt. All rights reserved. + * Author: Michael Hrabanek + * + * Derives from the file lib/lib_strlen.c: + * + * Copyright (C) 2007, 2008, 2010 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 + * COPYRIGHT OWNER 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <sys/types.h> +#include <string.h> + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +#ifndef CONFIG_ARCH_STRNLEN +size_t strnlen(const char *s, size_t maxlen) +{ + const char *sc; + for (sc = s; maxlen != 0 && *sc != '\0'; maxlen--, ++sc); + return sc - s; +} +#endif |