57 lines
1.9 KiB
ArmAsm
57 lines
1.9 KiB
ArmAsm
/*-
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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 are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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.asciz "@(#)strspn.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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* Span the string s2 (skip characters that are in s2).
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* Return the number of characters in s1 that were skipped.
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*
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* size_t
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* strspn(s1, s2)
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* const char *s1, *s2;
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*/
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#include "DEFS.h"
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ENTRY(strspn, 0)
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subl2 $32,sp /* make 256 bit table */
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movc5 $0,(sp),$0,$32,(sp)
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movq 4(ap),r1 /* r1 = s1, r2 = s2 */
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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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/* now clear bit for '\0' */
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/* (this is easier than avoiding setting it in the first place) */
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bicb2 $1,(sp) /* stop at '\0' */
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movl r1,r0 /* r0 = s (current pos in s1) */
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/* look for a character that is not in s2 */
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2:
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movzbl (r0)+,r2 /* c = *s++ */
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bbs r2,(sp),2b /* loop while c is in table */
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decl r0 /* s-- */
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subl2 r1,r0 /* r0 = s - s1 = count */
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ret
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