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curl

    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@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 */