68 lines
2.4 KiB
C
68 lines
2.4 KiB
C
/****************************************************************************
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* libs/libc/string/lib_strsep.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 <string.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: strsep
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*
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* Description:
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* If *strp is NULL, the strsep() function returns NULL and does
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* nothing else. Otherwise, this function finds the first token in the
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* string *strp, that is delimited by one of the bytes in the string
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* delim. This token is terminated by overwriting the delimiter with a
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* null byte ('\0'), and *strp is updated to point past the token.
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* In case no delimiter was found, the token is taken to be the entire
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* string *strp, and *strp is made NULL.
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*
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* Returned Value:
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* The strsep() function returns a pointer to the token, that is, it
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* returns the original value of *strp.
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*
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****************************************************************************/
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FAR char *strsep(FAR char **strp, FAR const char *delim)
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{
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FAR char *sbegin = *strp;
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FAR char *end;
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if (sbegin == NULL)
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{
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return NULL;
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}
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end = strpbrk(sbegin, delim);
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if (end != NULL)
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{
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*end++ = '\0';
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}
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*strp = end;
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return sbegin;
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}
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