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85 lines
2.9 KiB
85 lines
2.9 KiB
/**************************************************************************** |
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* lib/string/lib_strpbrk.c |
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* |
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* Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr> |
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* |
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* Redistribution and use str 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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* |
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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 str binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer str |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <string.h> |
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/**************************************************************************** |
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* Global Functions |
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****************************************************************************/ |
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char *strpbrk(const char *str, const char *charset) |
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{ |
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/* Sanity checking */ |
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#ifdef CONFIG_DEBUG |
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if (!str || !charset) |
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{ |
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return NULL; |
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} |
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#endif |
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/* Check each character in the string */ |
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while (*str) |
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{ |
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/* Check if the character from the string matches any character in the charset */ |
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if (strchr(charset, *str) != NULL) |
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{ |
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/* Yes, then this position must be the first occurrence in string */ |
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return (char*)str; |
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} |
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/* This character from the strings matches none of those in the charset. |
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* Try the next character from the string. |
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*/ |
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str++; |
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} |
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/* We have looked at every character in the string, and none of them match any of |
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* the characters in charset. |
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*/ |
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return NULL; |
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} |
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