Name
mempcpy, wmempcpy - copy memory areaLibrary
Standard C library ( libc ", " -lc )Synopsis
"#define(7)_GNU_SOURCE" " /* See feature_test_macros */" #include <string.h> void *mempcpy(void " dest "[restrict ." n "], const void " src "[restrict . n ],
size_t n );
"#define(7)_GNU_SOURCE" " /* See feature_test_macros */" #include <wchar.h> wchar_t *wmempcpy(wchar_t " dest "[restrict . n ],
const wchar_t " src "[restrict . n ],
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 bydest
. 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
. Attributes
For an explanation of the terms used in this section, see attributes(7).Interface | Attribute | Value |
T} | Thread safety | MT-Safe |
Standards
GNU.History
glibc 2.1.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; }