MEMORY(3C-SVR4)     RISC/os Reference Manual      MEMORY(3C-SVR4)



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

SYNOPSIS
     #include <string.h>

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

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

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

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

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

     void *memset (void *s, int c, sizet 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 (con-
     verted 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.



                        Printed 11/19/92                   Page 1

MEMORY(3C-SVR4)     RISC/os Reference Manual      MEMORY(3C-SVR4)



SEE ALSO
     string(3C).





















































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