1MEMPCPY(3)                 Linux Programmer's Manual                MEMPCPY(3)
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NAME

6       mempcpy, wmempcpy  - copy memory area
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SYNOPSIS

9       #define _GNU_SOURCE         /* See feature_test_macros(7) */
10       #include <string.h>
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12       void *mempcpy(void *dest, const void *src, size_t n);
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14       #define _GNU_SOURCE         /* See feature_test_macros(7) */
15       #include <wchar.h>
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17       wchar_t *wmempcpy(wchar_t *dest, const wchar_t *src, size_t n);
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DESCRIPTION

20       The  mempcpy()  function is nearly identical to the memcpy(3) function.
21       It copies n bytes from the object beginning  at  src  into  the  object
22       pointed  to by dest.  But instead of returning the value of dest it re‐
23       turns a pointer to the byte following the last written byte.
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25       This function is useful in situations where a number of  objects  shall
26       be copied to consecutive memory positions.
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28       The  wmempcpy()  function is identical but takes wchar_t type arguments
29       and copies n wide characters.
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RETURN VALUE

32       dest + n.
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VERSIONS

35       mempcpy() first appeared in glibc in version 2.1.
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ATTRIBUTES

38       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
39       tributes(7).
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41       ┌──────────────────────┬───────────────┬─────────┐
42       │Interface             │ Attribute     │ Value   │
43       ├──────────────────────┼───────────────┼─────────┤
44       │mempcpy(), wmempcpy() │ Thread safety │ MT-Safe │
45       └──────────────────────┴───────────────┴─────────┘

CONFORMING TO

47       This function is a GNU extension.
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EXAMPLES

50       void *
51       combine(void *o1, size_t s1, void *o2, size_t s2)
52       {
53           void *result = malloc(s1 + s2);
54           if (result != NULL)
55               mempcpy(mempcpy(result, o1, s1), o2, s2);
56           return result;
57       }
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SEE ALSO

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

63       This  page  is  part of release 5.10 of the Linux man-pages project.  A
64       description of the project, information about reporting bugs,  and  the
65       latest     version     of     this    page,    can    be    found    at
66       https://www.kernel.org/doc/man-pages/.
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70GNU                               2020-06-09                        MEMPCPY(3)
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