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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strsep.s 5.1 (Berkeley) 5/15/90"
#endif /* LIBC_SCCS and not lint */
/*
* Get next word from string *stringp, where words are
* strings separated by characters from delim.
*
* Writes NULs into the string at *stringp to end tokens.
* On return, *stringp points past the last NUL written (if there might
* be further tokens), or is NULL (if there are definitely no more tokens).
*
* If *stringp is NULL, strtoken returns NULL.
*
* char *
* strtoken(stringp, delim)
* register char **stringp;
* register char const *delim;
*/
#include "DEFS.h"
ENTRY(strsep, 0)
tstl *4(ap) /* if (*stringp == NULL) */
bneq 0f
clrl r0 # return (NULL);
ret
0:
subl2 $32,sp /* make room for 256 bit table */
movc5 $0,(sp),$0,$32,(sp)
movq 4(ap),r1 /* r1 = stringp, r2 = delim */
/* turn on bit for each character in s2, including '\0' */
1:
movzbl (r2)+,r0
bbss r0,(sp),1b
bneq 1b
movl (r1),r3 /* r3 = s = *stringp */
movl r3,r0 /* save return value */
/* scan for delimiters */
2:
movzbl (r3)+,r2 /* c = *s++ */
bbc r2,(sp),2b /* loop until c is in table */
beql 3f
clrb -1(r3) /* if c!='\0', s[-1] = 0 */
movl r3,(r1) /* and *stringp = s */
ret
3:
clrl (r1) /* else *stringp = NULL */
ret
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