crypto/heimdal-0.6.3/lib/roken/strsep_copy.c

   1 /*
   2  * Copyright (c) 2000, 2002 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 RCSID("$Id: strsep_copy.c,v 1.4 2002/08/14 17:20:40 joda Exp $");
  37 #endif
  38
  39 #include <string.h>
  40
  41 #include "roken.h"
  42
  43 #ifndef HAVE_STRSEP_COPY
  44
  45 /* strsep, but with const stringp, so return string in buf */
  46
  47 ssize_t
  48 strsep_copy(const char **stringp, const char *delim, char *buf, size_t len)
  49 {
  50     const char *save = *stringp;
  51     size_t l;
  52     if(save == NULL)
  53         return -1;
  54     *stringp = *stringp + strcspn(*stringp, delim);
  55     l = min(len, *stringp - save);
  56     if(len > 0) {
  57         memcpy(buf, save, l);
  58         buf[l] = '\0';
  59     }
  60
  61     l = *stringp - save;
  62     if(**stringp == '\0')
  63         *stringp = NULL;
  64     else
  65         (*stringp)++;
  66     return l;
  67 }
  68
  69 #endif