Home | History | Annotate | Download | only in libyasm 
      1 /*
      2  * strsep() implementation for systems that don't have it.
      3  *
      4  * Copyright (c) 1990, 1993
      5  *      The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 #define NO_STRING_INLINES
     32 #include "util.h"
     33 
     34 
     35 #if defined(LIBC_SCCS) && !defined(lint)
     36 static char sccsid[] = "@(#)strsep.c    8.1 (Berkeley) 6/4/93";
     37 #endif /* LIBC_SCCS and not lint */
     38 
     39 #ifdef HAVE_STRSEP
     40 #undef yasm__strsep
     41 #endif
     42 
     43 /*
     44  * Get next token from string *stringp, where tokens are possibly-empty
     45  * strings separated by characters from delim.
     46  *
     47  * Writes NULs into the string at *stringp to end tokens.
     48  * delim need not remain constant from call to call.
     49  * On return, *stringp points past the last NUL written (if there might
     50  * be further tokens), or is NULL (if there are definitely no more tokens).
     51  *
     52  * If *stringp is NULL, strsep returns NULL.
     53  */
     54 /*@-nullstate@*/
     55 char *
     56 yasm__strsep(char **stringp, const char *delim)
     57 {
     58 #ifdef HAVE_STRSEP
     59     return strsep(stringp, delim);
     60 #else
     61         register char *s;
     62         register const char *spanp;
     63         register int c, sc;
     64         char *tok;
     65 
     66         if ((s = *stringp) == NULL)
     67                 return (NULL);
     68         for (tok = s;;) {
     69                 c = *s++;
     70                 spanp = delim;
     71                 do {
     72                         if ((sc = *spanp++) == c) {
     73                                 if (c == 0)
     74                                         s = NULL;
     75                                 else
     76                                         s[-1] = 0;
     77                                 *stringp = s;
     78                                 return (tok);
     79                         }
     80                 } while (sc != 0);
     81         }
     82         /* NOTREACHED */
     83 #endif
     84 }
     85 /*@=nullstate@*/
     86