std::wmemset
From cppreference.com
Defined in header
<cwchar>
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wchar_t* wmemset( wchar_t* dest, wchar_t ch, std::size_t count );
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Copies the wide character ch
into each of the first count
wide characters of the wide character array pointed to by dest
.
If overflow occurs, the behavior is undefined.
If count
is zero, the function does nothing.
Contents |
[edit] Parameters
dest | - | pointer to the wide character array to fill |
ch | - | fill wide character |
count | - | number of wide characters to fill |
[edit] Return value
Returns a copy of dest
[edit] Notes
This function is not locale-sensitive and pays no attention to the values of the wchar_t objects it writes: nulls as well as invalid wide characters are written too.
[edit] Example
Run this code
#include <iostream> #include <cwchar> #include <clocale> #include <locale> int main() { wchar_t ar[4] = {L'1', L'2', L'3', L'4'}; std::wmemset(ar, L'\U0001f34c', 2); // replaces [12] with the 🍌 bananas std::wmemset(ar+2, L'蕉', 2); // replaces [34] with the 蕉 bananas std::setlocale(LC_ALL, "en_US.utf8"); std::wcout.imbue(std::locale("en_US.utf8")); std::wcout << std::wstring(ar, 4) << '\n'; }
Possible output:
🍌🍌蕉蕉
[edit] See also
fills a buffer with a character (function) |
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copies a certain amount of wide characters between two non-overlapping arrays (function) |
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assigns a value to a number of elements (function template) |
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C documentation for wmemset
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