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Annotation of coherent/b/lib/libc/string/i8086/strncpy.m, revision 1.1.1.1

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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