wmempcpy(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.

EXAMPLE

   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 4.09 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/.

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