memccpy, memchr, memcmp, memcpy, memset, bcopy

Purpose

     Performs memory operations.

Library

     Standard C Library (libc.a)

Syntax

     #include <memory.h>

     char *memccpy (target, source, c, n)      char *memcpy (target, source, n)
     char *target, *source;                    char *target, *source;
     int c, n;                                 int n;

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

     int memcmp (target, source, n)            char *bcopy (source, target, n)
     char *target, *source;                    char *source, *target;
     int n;                                    int n;
     Description

     The memory subroutines operate on memory areas.  A memory
     area is  an array of  characters bounded by a  count, and
     not terminated  by a null character.   The memory subrou-
     tines  do not  check for  the overflow  of any  receiving
     memory area.  All of  the memory subroutines are declared
     in the memory.h header file.

     The memccpy subroutine copies characters from memory area
     source into  memory area target.  The  memccpy subroutine
     stops after the  first character c is copied,  or after n
     characters  have  been  copied,  whichever  comes  first.
     memccpy returns  a pointer  to the  character after  c is
     copied into target,  or a NULL pointer if c  is not found
     in the first n characters of source.

     The  memchr subroutine  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.

     The  memcmp  subroutine  lexicographically  compares  the
     first n characters  in memory area target to  the first n
     characters  in memory  area source.   memcmp uses  native
     character  comparison,  which  may   be  signed  on  some
     machines.   The memcmp  subroutine returns  the following
     values:

     Less than 0       If target is less than source
     Equal to 0        If target is equal to source

     Greater than 0    If target is greater than source.

     The  memcpy subroutine  copies n  characters from  memory
     area source to area target and returns target.

     The  memset subroutine  sets  the first  n characters  in
     memory area s to the value of character c and returns s.

     Like the memcpy subroutine, the bcopy subroutine copies n
     characters from  memory area source to  area target.  The
     order of the  parameters is reversed for  bcopy, with the
     source  being specified  first.  This  subroutine has  no
     return values.

     Warning:  Character movement  is performed differently in
     different  implementations of  these subroutines;  there-
     fore, overlapping moves may yield unexpected results.

     Related Information

     In this book:  "string" and "swab."