rockbox/firmware/libc/strtok.c
Thomas Martitz 50a6ca39ad Move c/h files implementing/defining standard library stuff into a new libc directory, also standard'ify some parts of the code base (almost entirely #include fixes).
This is to a) to cleanup firmware/common and firmware/include a bit, but also b) for Rockbox as an application which should use the host system's c library and headers, separating makes it easy to exclude our files from the build.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25850 a1c6a512-1295-4272-9138-f99709370657
2010-05-06 21:04:40 +00:00

63 lines
2.1 KiB
C

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Daniel Stenberg
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied. *
****************************************************************************/
#include "config.h"
#ifndef HAVE_STRTOK_R
#include <stddef.h>
#include <string.h>
char *
strtok_r(char *ptr, const char *sep, char **end)
{
if (!ptr)
/* we got NULL input so then we get our last position instead */
ptr = *end;
/* pass all letters that are including in the separator string */
while (*ptr && strchr(sep, *ptr))
++ptr;
if (*ptr) {
/* so this is where the next piece of string starts */
char *start = ptr;
/* set the end pointer to the first byte after the start */
*end = start + 1;
/* scan through the string to find where it ends, it ends on a
null byte or a character that exists in the separator string */
while (**end && !strchr(sep, **end))
++*end;
if (**end) {
/* the end is not a null byte */
**end = '\0'; /* zero terminate it! */
++*end; /* advance last pointer to beyond the null byte */
}
return start; /* return the position where the string starts */
}
/* we ended up on a null byte, there are no more strings to find! */
return NULL;
}
#endif /* this was only compiled if strtok_r wasn't present */