usr/src/cmd/sendmail/db/clib/strsep.c

   1 /*-
   2  * See the file LICENSE for redistribution information.
   3  *
   4  * Copyright (c) 1996, 1997
   5  *      Sleepycat Software.  All rights reserved.
   6  */
   7 /*
   8  * Copyright (c) 1990, 1993
   9  *      The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 /*
  41  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
  42  */
  43
  44 #include "config.h"
  45
  46 #ifndef lint
  47 static const char sccsid[] = "@(#)strsep.c      10.1 (Sleepycat) 4/12/97";
  48 #endif /* not lint */
  49
  50 #ifndef NO_SYSTEM_INCLUDES
  51 #include <string.h>
  52 #include <stdio.h>
  53 #endif
  54
  55 /*
  56  * Get next token from string *stringp, where tokens are possibly-empty
  57  * strings separated by characters from delim.
  58  *
  59  * Writes NULs into the string at *stringp to end tokens.
  60  * delim need not remain constant from call to call.
  61  * On return, *stringp points past the last NUL written (if there might
  62  * be further tokens), or is NULL (if there are definitely no more tokens).
  63  *
  64  * If *stringp is NULL, strsep returns NULL.
  65  *
  66  * PUBLIC: #ifndef HAVE_STRSEP
  67  * PUBLIC: char *strsep __P((char **, const char *));
  68  * PUBLIC: #endif
  69  */
  70
  71 #ifndef HAVE_STRSEP
  72
  73 char *
  74 strsep(stringp, delim)
  75         register char **stringp;
  76         register const char *delim;
  77 {
  78         register char *s;
  79         register const char *spanp;
  80         register int c, sc;
  81         char *tok;
  82
  83         if ((s = *stringp) == NULL)
  84                 return (NULL);
  85         for (tok = s;;) {
  86                 c = *s++;
  87                 spanp = delim;
  88                 do {
  89                         if ((sc = *spanp++) == c) {
  90                                 if (c == 0)
  91                                         s = NULL;
  92                                 else
  93                                         s[-1] = 0;
  94                                 *stringp = s;
  95                                 return (tok);
  96                         }
  97                 } while (sc != 0);
  98         }
  99         /* NOTREACHED */
 100 }
 101
 102 #endif  /* HAVE_STRSEP */