strtok.c revision 56a424cca6b3f91f31bdab72a4626c48c779fe8b
/*
* Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved
*
*/
/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stddef.h>
#include <string.h>
#include "nstrtok.h"
/*
* Function: nstrtok
*
* Purpose: the same as strtok ... just different. does not deal with
* multiple tokens in row.
*
* Arguments:
* s (input) string to scan
* delim (input) list of delimiters
* <return value> string or null on error.
*
* Requires:
* nuttin
*
* Effects:
* sets last to string
*
* Modifies:
* last
*
*/
char *
register char *s;
register const char *delim;
{
register const char *spanp;
register int c, sc;
char *tok;
static char *last;
return (NULL);
/*
* Skip (span) leading delimiters (s += strspn(s, delim), sort of).
*/
#ifdef OLD
cont:
c = *s++;
if (c == sc)
goto cont;
}
if (c == 0) { /* no non-delimiter characters */
return (NULL);
}
tok = s - 1;
#else
tok = s;
#endif
/*
* Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
* Note that delim must have one NUL; we stop if we see that, too.
*/
for (;;) {
c = *s++;
do {
if (c == 0)
s = NULL;
else
s[-1] = 0;
last = s;
return (tok);
}
} while (sc != 0);
}
/* NOTREACHED */
}