mempcpy

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



NAME
       mempcpy, wmempcpy  - copy memory area

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

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

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

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

DESCRIPTION
       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
       dest + n.

VERSIONS
       mempcpy() first appeared in glibc in version 2.1.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       ┌──────────────────────┬───────────────┬─────────┐
       │Interface             Attribute     Value   │
       ├──────────────────────┼───────────────┼─────────┤
       │mempcpy(), wmempcpy() │ Thread safety │ MT-Safe │
       └──────────────────────┴───────────────┴─────────┘
CONFORMING TO
       This function is a GNU extension.

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

COLOPHON
       This page is part of release 5.09 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
       https://www.kernel.org/doc/man-pages/.



GNU                                2020-06-09                         MEMPCPY(3)