source: trunk/minix/lib/i86/string/strncpy.s@ 11

!       strncpy()                                       Author: Kees J. Bot
!                                                               27 Jan 1994
.sect .text; .sect .rom; .sect .data; .sect .bss

! char *strncpy(char *s1, const char *s2, size_t n)
!       Copy string s2 to s1.
!
.sect .text
.define _strncpy
_strncpy:
        push    bp
        mov     bp, sp
        push    si
        push    di
        mov     cx, 8(bp)       ! Maximum length
        call    __strncpy       ! Common code
        mov     cx, dx          ! Number of bytes not copied
    rep stosb                   ! strncpy always copies n bytes by null padding
        mov     ax, 4(bp)       ! Return s1
        pop     di
        pop     si
        pop     bp
        ret