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51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/* File : strlen.c
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Author : Richard A. O'Keefe. / Monty
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Michael Widenius; ifdef MC68000
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Updated: 1986-11-30
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Defines: strlen()
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strlen(s) returns the number of characters in s, that is, the number
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of non-NUL characters found before the closing NULEosCh. Note: some
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non-standard C compilers for 32-bit machines take int to be 16 bits,
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either put up with short strings or change int to long throughout
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this package. Better yet, BOYCOTT such shoddy compilers.
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Beware: the asm version works only if strlen(s) < 65536.
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*/
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#include "strings.h"
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#if VaxAsm
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size_s strlen(char *s)
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{
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asm("locc $0,$65535,*4(ap)");
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asm("subl3 r0,$65535,r0");
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}
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#else
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#if defined(MC68000) && defined(DS90)
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size_s strlen(char *s)
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{
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asm(" movl 4(a7),a0 ");
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asm(" movl a0,a1 ");
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asm(".L4: tstb (a0)+ ");
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asm(" jne .L4 ");
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asm(" movl a0,d0 ");
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asm(" subl a1,d0 ");
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asm(" subql #1,d0 ");
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}
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#else
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size_s strlen(register char *s)
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{
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register char *startpos;
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startpos = s;
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while (*s++);
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return ((size_s) (s-startpos-1));
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}
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#endif
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#endif
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