wmemmove - Man Page

copy wide characters in memory with overlapping areas


This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.


#include <wchar.h>

wchar_t *wmemmove(wchar_t *ws1, const wchar_t *ws2, size_t n);


The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C standard.

The wmemmove() function shall copy n wide characters from the object pointed to by ws2 to the object pointed to by ws1. Copying shall take place as if the n wide characters from the object pointed to by ws2 are first copied into a temporary array of n wide characters that does not overlap the objects pointed to by ws1 or ws2, and then the n wide characters from the temporary array are copied into the object pointed to by ws1.

This function shall not be affected by locale and all wchar_t values shall be treated identically. The null wide character and wchar_t values not corresponding to valid characters shall not be treated specially.

If n is zero, the application shall ensure that ws1 and ws2 are valid pointers, and the function shall copy zero wide characters.

Return Value

The wmemmove() function shall return the value of ws1.


No errors are defined

The following sections are informative.



Application Usage




Future Directions


See Also

wmemchr(), wmemcmp(), wmemcpy(), wmemset()

The Base Definitions volume of POSIX.1-2017, <wchar.h>

Referenced By

wchar.h(0p), wmemchr(3p), wmemcmp(3p), wmemcpy(3p), wmemset(3p).

2017 IEEE/The Open Group POSIX Programmer's Manual