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mempcpy(3) — Linux manual page

mempcpy(3)               Library Functions Manualmempcpy(3)

NAME        top

       mempcpy, wmempcpy  - copy memory area

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#define _GNU_SOURCE/* See feature_test_macros(7) */#include <string.h>void *mempcpy(size_t n;voiddest[restrictn], const voidsrc[restrictn],size_tn);#define _GNU_SOURCE/* See feature_test_macros(7) */#include <wchar.h>wchar_t *wmempcpy(size_t n;wchar_tdest[restrictn], const wchar_tsrc[restrictn],size_tn);

DESCRIPTION        top

       Themempcpy() function is nearly identical to thememcpy(3)       function.  It copiesn bytes from the object beginning atsrc into       the object pointed to bydest.  But instead of returning the value       ofdest 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.       Thewmempcpy() function is identical but takeswchar_t type       arguments and copiesn wide characters.

RETURN VALUE        top

dest +n.

ATTRIBUTES        top

       For an explanation of the terms used in this section, seeattributes(7).       ┌──────────────────────────────────────┬───────────────┬─────────┐       │Interface│Attribute│Value│       ├──────────────────────────────────────┼───────────────┼─────────┤       │mempcpy(),wmempcpy()                │ Thread safety │ MT-Safe │       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS        top

       GNU.

HISTORY        top

       glibc 2.1.

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 theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-06-28mempcpy(3)

Pages that refer to this page:memcpy(3), wmemcpy(3), string_copying(7)

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