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86 lines
3.0 KiB
ArmAsm
86 lines
3.0 KiB
ArmAsm
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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.asciz "@(#)strsep.s 5.1 (Berkeley) 5/15/90"
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#endif /* LIBC_SCCS and not lint */
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/*
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* Get next word from string *stringp, where words are
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* strings separated by characters from delim.
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*
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* Writes NULs into the string at *stringp to end tokens.
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* On return, *stringp points past the last NUL written (if there might
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* be further tokens), or is NULL (if there are definitely no more tokens).
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*
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* If *stringp is NULL, strtoken returns NULL.
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*
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* char *
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* strtoken(stringp, delim)
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* register char **stringp;
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* register char const *delim;
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*/
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#include "DEFS.h"
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ENTRY(strsep, 0)
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tstl *4(ap) /* if (*stringp == NULL) */
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bneq 0f
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clrl r0 # return (NULL);
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ret
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0:
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subl2 $32,sp /* make room for 256 bit table */
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movc5 $0,(sp),$0,$32,(sp)
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movq 4(ap),r1 /* r1 = stringp, r2 = delim */
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/* turn on bit for each character in s2, including '\0' */
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1:
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movzbl (r2)+,r0
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bbss r0,(sp),1b
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bneq 1b
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movl (r1),r3 /* r3 = s = *stringp */
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movl r3,r0 /* save return value */
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/* scan for delimiters */
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2:
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movzbl (r3)+,r2 /* c = *s++ */
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bbc r2,(sp),2b /* loop until c is in table */
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beql 3f
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clrb -1(r3) /* if c!='\0', s[-1] = 0 */
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movl r3,(r1) /* and *stringp = s */
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ret
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3:
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clrl (r1) /* else *stringp = NULL */
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ret
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