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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel (at) haxx.se>, et al.
      9  *
     10  * This software is licensed as described in the file COPYING, which
     11  * you should have received as part of this distribution. The terms
     12  * are also available at https://curl.haxx.se/docs/copyright.html.
     13  *
     14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
     15  * copies of the Software, and permit persons to whom the Software is
     16  * furnished to do so, under the terms of the COPYING file.
     17  *
     18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
     19  * KIND, either express or implied.
     20  *
     21  ***************************************************************************/
     22 
     23 #include "curl_setup.h"
     24 
     25 #ifndef HAVE_STRTOK_R
     26 #include <stddef.h>
     27 
     28 #include "strtok.h"
     29 
     30 char *
     31 Curl_strtok_r(char *ptr, const char *sep, char **end)
     32 {
     33   if(!ptr)
     34     /* we got NULL input so then we get our last position instead */
     35     ptr = *end;
     36 
     37   /* pass all letters that are including in the separator string */
     38   while(*ptr && strchr(sep, *ptr))
     39     ++ptr;
     40 
     41   if(*ptr) {
     42     /* so this is where the next piece of string starts */
     43     char *start = ptr;
     44 
     45     /* set the end pointer to the first byte after the start */
     46     *end = start + 1;
     47 
     48     /* scan through the string to find where it ends, it ends on a
     49        null byte or a character that exists in the separator string */
     50     while(**end && !strchr(sep, **end))
     51       ++*end;
     52 
     53     if(**end) {
     54       /* the end is not a null byte */
     55       **end = '\0';  /* zero terminate it! */
     56       ++*end;        /* advance the last pointer to beyond the null byte */
     57     }
     58 
     59     return start; /* return the position where the string starts */
     60   }
     61 
     62   /* we ended up on a null byte, there are no more strings to find! */
     63   return NULL;
     64 }
     65 
     66 #endif /* this was only compiled if strtok_r wasn't present */
     67