memory(3C)                     DG/UX 5.4R3.00                     memory(3C)


NAME
       memory: memccpy, memchr, memcmp, memcpy, memmove, memset - memory
       operations

SYNOPSIS
       #include <string.h>

       void *memccpy (void *s1, const void *s2, int c, size_t n);

       void *memchr (const void *s, int c, size_t n);

       int memcmp (const void *s1, const void *s2, size_t n);

       void *memcpy (void *s1, const void *s2, size_t n);

       void *memmove (void *s1, const void *s2, size_t n);

       void *memset (void *s, int c, size_t n);

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

       memccpy copies bytes from memory area s2 into s1, stopping after the
       first occurrence of c (converted to an unsigned char) has been
       copied, or after n bytes have been copied, whichever comes first.  It
       returns a pointer to the byte after the copy of c in s1, or a null
       pointer if c was not found in the first n bytes of s2.

       memchr returns a pointer to the first occurrence of c (converted to
       an unsigned char) in the first n bytes (each interpreted as an
       unsigned char) of memory area s, or a null pointer if c does not
       occur.

       memcmp compares its arguments, looking at the first n bytes (each
       interpreted as an unsigned char), and returns an integer less than,
       equal to, or greater than 0, according as s1 is lexicographically
       less than, equal to, or greater than s2 when taken to be unsigned
       characters.

       memcpy copies n bytes from memory area s2 to s1.  It returns s1.

       memmove copies n bytes from memory areas s2 to s1.  Copying between
       objects that overlap will take place correctly.  It returns s1.

       memset sets the first n bytes in memory area s to the value of c
       (converted to an unsigned char).  It returns s.

   Considerations for Threads Programming






Licensed material--property of copyright holder(s)                         1

memory(3C)                     DG/UX 5.4R3.00                     memory(3C)


                     +---------+-----------------------------+
                     |         |                      async- |
                     |function | reentrant   cancel   cancel |
                     |         |              point    safe  |
                     +---------+-----------------------------+
                     |memccpy  |     Y          N        N   |
                     |memchr   |     Y          N        N   |
                     |memcmp   |     Y          N        N   |
                     |memcpy   |     Y          N        N   |
                     |memmove  |     Y          N        N   |
                     |memset   |     Y          N        N   |
                     +---------+-----------------------------+

SEE ALSO
       reentrant(3), string(3C).










































Licensed material--property of copyright holder(s)                         2