curl/lib/strtok.c

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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
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***************************************************************************/
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#include "setup.h"
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#ifndef HAVE_STRTOK_R
#include <stddef.h>
#include "strtok.h"
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char *
Curl_strtok_r(char *ptr, const char *sep, char **end)
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{
if(!ptr)
/* we got NULL input so then we get our last position instead */
ptr = *end;
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/* pass all letters that are including in the separator string */
while(*ptr && strchr(sep, *ptr))
++ptr;
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if(*ptr) {
/* so this is where the next piece of string starts */
char *start = ptr;
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/* set the end pointer to the first byte after the start */
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*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 the last pointer to beyond the null byte */
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}
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;
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}
#endif /* this was only compiled if strtok_r wasn't present */