Return to strspn.s CVS log

Up to [CSRG BSD Unix] / 43BSDReno / lib / libc / vax / string

Annotation of 43BSDReno/lib/libc/vax/string/strspn.s, revision 1.1.1.1

1.1       root        1: /*-
                      2:  * Copyright (c) 1990 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #if defined(LIBC_SCCS) && !defined(lint)
                     21:        .asciz "@(#)strspn.s    5.1 (Berkeley) 5/15/90"
                     22: #endif /* LIBC_SCCS and not lint */
                     23: 
                     24: /*
                     25:  * Span the string s2 (skip characters that are in s2).
                     26:  * Return the number of characters in s1 that were skipped.
                     27:  *
                     28:  * size_t
                     29:  * strspn(s1, s2)
                     30:  *     const char *s1, *s2;
                     31:  */
                     32: #include "DEFS.h"
                     33: 
                     34: ENTRY(strspn, 0)
                     35:        subl2   $32,sp          /* make 256 bit table */
                     36:        movc5   $0,(sp),$0,$32,(sp)
                     37:        movq    4(ap),r1        /* r1 = s1, r2 = s2 */
                     38: 
                     39:        /* turn on bit for each character in s2, including '\0' */
                     40: 1:
                     41:        movzbl  (r2)+,r0
                     42:        bbss    r0,(sp),1b
                     43:        bneq    1b
                     44: 
                     45:        /* now clear bit for '\0' */
                     46:        /* (this is easier than avoiding setting it in the first place) */
                     47:        bicb2   $1,(sp)         /* stop at '\0' */
                     48:        movl    r1,r0           /* r0 = s (current pos in s1) */
                     49: 
                     50:        /* look for a character that is not in s2 */
                     51: 2:
                     52:        movzbl  (r0)+,r2        /* c = *s++ */
                     53:        bbs     r2,(sp),2b      /* loop while c is in table */
                     54:        decl    r0              /* s-- */
                     55:        subl2   r1,r0           /* r0 = s - s1 = count */
                     56:        ret

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.