def007e2d7
since it's useful to redirect these functions to others sometime(e.g. validate the memory before write). Change-Id: I6253a9231af8809e8362f4bc5a1bd67fb094c3b0
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/****************************************************************************
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* libs/libc/string/lib_strpbrk.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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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* Public Functions
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****************************************************************************/
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#undef strpbrk /* See mm/README.txt */
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FAR char *strpbrk(FAR const char *str, FAR const char *charset)
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{
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/* Sanity checking */
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#ifdef CONFIG_DEBUG_FEATURES
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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
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* charset
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*/
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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 (FAR char *)str;
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}
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/* This character from the strings matches none of those in the
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* charset. 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
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* any of the characters in charset.
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*/
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return NULL;
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}
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