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Annotation of coherent/b/lib/libc/string/i8086/strncpy.m, revision 1.1

1.1     ! root        1: //////////
        !             2: / i8086 C string library.
        !             3: / strncpy()
        !             4: / ANSI 4.11.2.4.
        !             5: //////////
        !             6: 
        !             7: //////////
        !             8: / char *
        !             9: / strncpy(To, From, Count)
        !            10: / char *To, *From;
        !            11: / int Count;
        !            12: /
        !            13: / Copy up to Count bytes from From to To,
        !            14: / then NUL-pad if Count not reached.
        !            15: //////////
        !            16: 
        !            17: #include <larges.h>
        !            18: 
        !            19: To     =       LEFTARG
        !            20: From   =       To+DPL
        !            21: Count  =       From+DPL
        !            22: 
        !            23:        Enter(strncpy_)
        !            24:        Les     di, To(bp)      / To address to ES:DI
        !            25:        mov     cx, Count(bp)   / Count to CX
        !            26:        or      cx, cx
        !            27:        je      2f              / Copy nothing
        !            28:        Lds     si, From(bp)    / From address to DS:SI
        !            29:        cld
        !            30: 
        !            31: 1:     lodsb                   / Fetch From character
        !            32:        stosb                   / and store through To
        !            33:        orb     al, al
        !            34:        loopne  1b              / Continue if AL!=0 && CX!=0
        !            35:        rep                     / Finish clearing line
        !            36:        stosb                   / (does nothing if CX==0)
        !            37: 
        !            38: 2:     mov     ax, To(bp)      / Return the destination
        !            39: #if    LARGEDATA
        !            40:        mov     dx, es
        !            41: #endif
        !            42:        Leave

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