diff options
Diffstat (limited to 'nuttx/lib/string/lib_strpbrk.c')
-rw-r--r-- | nuttx/lib/string/lib_strpbrk.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/nuttx/lib/string/lib_strpbrk.c b/nuttx/lib/string/lib_strpbrk.c new file mode 100644 index 000000000..134058775 --- /dev/null +++ b/nuttx/lib/string/lib_strpbrk.c @@ -0,0 +1,85 @@ +/**************************************************************************** + * lib/string/lib_strpbrk.c + * + * Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use str 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 str binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer str + * 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 <string.h> + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +char *strpbrk(const char *str, const char *charset) +{ + /* Sanity checking */ + +#ifdef CONFIG_DEBUG + if (!str || !charset) + { + return NULL; + } +#endif + + /* Check each character in the string */ + + while (*str) + { + /* Check if the character from the string matches any character in the charset */ + + if (strchr(charset, *str) != NULL) + { + /* Yes, then this position must be the first occurrence in string */ + + return (char*)str; + } + + /* This character from the strings matches none of those in the charset. + * Try the next character from the string. + */ + + str++; + } + + /* We have looked at every character in the string, and none of them match any of + * the characters in charset. + */ + + return NULL; +} + |