Manpages - mempcpy.3

mempcpy, wmempcpy - copy memory area

  #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",constwchar_t*restrict"src,
   size_t n);

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.

dest + n.

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

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

This function is a GNU extension.

  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;
  }

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

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