51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*-
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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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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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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#ifndef mc68000
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#include <string.h>
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size_t strlen(const char *string)
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{
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const char *s=string;
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while(*s++)
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;
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return ~(string-s);
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}
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#else
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#include "defs.h"
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ENTRY(strlen)
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asm(" \n\
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movl sp@(4),a0 /* string */ \n\
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movl a0,d0 \n\
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beq ret \n\
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slloop: \n\
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tstb a0@+ /* null? */ \n\
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jne slloop /* no, keep going */ \n\
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subl a0,d0 \n\
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notl d0 \n\
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ret: rts \n\
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");
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#endif
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