NAME¶

std::wmemmove - std::wmemmove

Synopsis¶

Defined in header <cwchar>
wchar_t* wmemmove( wchar_t* dest, const wchar_t* src, std::size_t count );

Copies exactly count successive wide characters from the wide character array
pointed to by src to the wide character array pointed to by dest.

If count is zero, the function does nothing.

The arrays may overlap: copying takes place as if the wide characters were copied to
a temporary wide character array and then copied from the temporary array to dest.

Parameters¶

dest - pointer to the wide character array to copy to
src - pointer to the wide character array to copy from
count - number of wide characters to copy

Return value¶

Returns a copy of dest

Notes¶

This function is not locale-sensitive and pays no attention to the values of the
wchar_t objects it copies: nulls as well as invalid characters are copied too.

Example¶

// Run this code

#include <iostream>
#include <cwchar>
#include <locale>
#include <clocale>

int main()
{
std::setlocale(LC_ALL, "en_US.utf8");
std::wcout.imbue(std::locale("en_US.utf8"));

wchar_t str[] = L"αβγδεζηθικλμνξοπρστυφχψω";
std::wcout << str << '\n';
std::wmemmove(str+4, str+3, 3); // copy from [δεζ] to [εζη]
std::wcout << str << '\n';
}

Possible output:¶

αβγδεζηθικλμνξοπρστυφχψω
αβγδδεζθικλμνξοπρστυφχψω

See also¶

copies a certain amount of wide characters between two non-overlapping
wmemcpy arrays
(function)
memmove moves one buffer to another
(function)
copy copies a range of elements to a new location
copy_if (function template)
(C++11)
copy_backward copies a range of elements in backwards order
(function template)