nuttx/libs/libc/string/lib_strchrnul.c

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2021-09-22 09:37:56 +02:00
/****************************************************************************
* libs/libc/string/lib_strchrnul.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <string.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: strchrnul
*
* Description:
* The strchrnul() function locates the first occurrence of 'c' (converted
* to a char) in the string pointed to by 's'. The terminating null byte is
* considered to be part of the string.
*
* Returned Value:
* Upon completion, strchrnull() returns a pointer to the byte, or a
* pointer to null if the byte was not found.
*
****************************************************************************/
FAR char *strchrnul(FAR const char *s, int c)
{
if (s)
{
while (*s && *s != c)
{
s++;
}
}
return (FAR char *)s;
}