mempcpy(3) — Linux manual page


MEMPCPY(3)              Linux Programmer's Manual             MEMPCPY(3)

NAME         top

       mempcpy, wmempcpy  - copy memory area

SYNOPSIS         top

       #define _GNU_SOURCE         /* See feature_test_macros(7) */
       #include <string.h>

       void *mempcpy(void *restrict dest, const void *restrict src, size_t n);

       #define _GNU_SOURCE         /* See feature_test_macros(7) */
       #include <wchar.h>

       wchar_t *wmempcpy(wchar_t *restrict dest, const wchar_t *restrict src,
                         size_t n);

DESCRIPTION         top

       The mempcpy() function is nearly identical to the memcpy(3)
       function.  It copies n bytes from the object beginning at src
       into the object pointed to by dest.  But instead of returning the
       value of dest it returns a pointer to the byte following the last
       written byte.

       This function is useful in situations where a number of objects
       shall be copied to consecutive memory positions.

       The wmempcpy() function is identical but takes wchar_t type
       arguments and copies n wide characters.

RETURN VALUE         top

       dest + n.

VERSIONS         top

       mempcpy() first appeared in glibc in version 2.1.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see

       │Interface                             Attribute     Value   │
       │mempcpy(), wmempcpy()                 │ Thread safety │ MT-Safe │

CONFORMING TO         top

       This function is a GNU extension.

EXAMPLES         top

       void *
       combine(void *o1, size_t s1, void *o2, size_t s2)
           void *result = malloc(s1 + s2);
           if (result != NULL)
               mempcpy(mempcpy(result, o1, s1), o2, s2);
           return result;

SEE ALSO         top

       memccpy(3), memcpy(3), memmove(3), wmemcpy(3)

COLOPHON         top

       This page is part of release 5.13 of the Linux man-pages project.
       A description of the project, information about reporting bugs,
       and the latest version of this page, can be found at

GNU                            2021-03-22                     MEMPCPY(3)

Pages that refer to this page: memcpy(3)wmemcpy(3)