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