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/****************************************************************************
* lib_strtok.c
*
* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <string.h>
/****************************************************************************
* Private Data
****************************************************************************/
static char *g_saveptr = NULL;
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: strtok
*
* Description:
* The strtok() function parses a string into a
* sequence of tokens. On the first call to strtok() the
* string to be parsed should be specified in 'str'. In
* each subsequent call that should parse the same string,
* 'str' should be NULL.
*
* The 'delim' argument specifies a set of characters that
* delimit the tokens in the parsed string. The caller
* may specify different strings in delim in successive
* calls that parse the same string.
*
* Each call to strtok() returns a pointer to a null-
* terminated string containing the next token. This
* string does not include the delimiting character. If
* no more tokens are found, strtok() returns NULL.
*
* A sequence of two or more contiguous delimiter
* characters in the parsed string is considered to be a
* single delimiter. Delimiter characters at the start or
* end of the string are ignored. The tokens returned by
* strtok() are always non-empty strings.
*
* Return
* strtok() returns a pointer to the next token, or NULL
* if there are no more tokens.
*
****************************************************************************/
char *strtok(char *str, const char *delim)
{
return strtok_r(str, delim, &g_saveptr);
}
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