memset(3c) — DG/UX 4.00



                                                               memory(3c)



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        memccpy, memchr, memcmp, memcpy, memset
        memory operations
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        SYNTAX

        #include <memory.h>

        char *memccpy (s1, s2, c, n)
        char *s1, *s2;
        int c, n;

        char *memchr (s, c, n)
        char *s;
        int c, n;

        int memcmp (s1, s2, n)
        char *s1, *s2;
        int n;

        char *memcpy (s1, s2, n)
        char *s1, *s2;
        int n;

        char *memset (s, c, n)
        char *s;
        int c, n;


        DESCRIPTION

        These functions operate as efficiently as possible on memory
        areas (arrays of characters bounded by a count, not terminated by
        a null character).  They do not check for the overflow of any
        receiving memory area.

        Memccpy copies characters from memory area s2 into s1, stopping
        after the first occurrence of character c has been copied, or
        after n characters have been copied, whichever comes first.  It
        returns a pointer to the character after the copy of c in s1, or
        a NULL pointer if c was not found in the first n characters of
        s2.

        Memchr returns a pointer to the first occurrence of character c
        in the first n characters of memory area s, or a NULL pointer if
        c does not occur.

        Memcmp compares its arguments, looking at the first n characters
        only, and returns an integer less than, equal to, or greater than



        DG/UX 4.00                                                 Page 1
               Licensed material--property of copyright holder(s)



                                                               memory(3c)



        0, according to whether s1 is lexicographically less than, equal
        to, or greater than s2.

        Memcpy copies n characters from memory area s2 to s1.  It returns
        s1.

        Memset sets the first n characters in memory area s to the value
        of character c.  It returns s.


        NOTE

        For user convenience, all these functions are declared in the
        optional <memory.h> header file.


        BUGS

        The sign of the value returned when one of the characters has its
        high-order bit set is implementation-dependent.

        Character movement is performed differently in different
        implementations.  Thus overlapping moves may yield surprises.































        DG/UX 4.00                                                 Page 2
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