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std::wcsncpy(3) C++ Standard Libary std::wcsncpy(3) NAME std::wcsncpy - std::wcsncpy Synopsis Defined in header <cwchar> wchar_t *wcsncpy( wchar_t *dest, const wchar_t *src, std::size_t count ); Copies at most count characters of the wide string pointed to by src (including the terminating null wide character) to wide character array pointed to by dest. If count is reached before the entire string src was copied, the re- sulting wide character array is not null-terminated. If, after copying the terminating null wide character from src, count is not reached, additional null wide characters are written to dest until the total of count characters have been written. If the strings overlap, the behavior is undefined. Parameters dest - pointer to the wide character array to copy to src - pointer to the wide string to copy from count - maximum number of wide characters to copy Return value dest Notes In typical usage, count is the size of the destination array. Example // Run this code #include <iostream> #include <cwchar> int main() { const wchar_t src[] = L"hi"; wchar_t dest[6] = {L'a', L'b', L'c', L'd', L'e', L'f'}; std::wcsncpy(dest, src, 5); // this will copy 'hi' and repeat \0 three times std::wcout << "The contents of dest are: "; for(const wchar_t c : dest) { if(c) std::wcout << c << ' '; else std::wcout << "\\0" << ' '; } std::wcout << '\n'; } Output: The contents of dest are: h i \0 \0 \0 f See also wcscpy copies one wide string to another (function) copies a certain amount of wide characters between two non- overlapping wmemcpy arrays (function) strncpy copies a certain amount of characters from one string to an- other (function) http://cppreference.com 2022.07.31 std::wcsncpy(3)
NAME | Synopsis | Parameters | Return value | Notes | Example | Output: | See also
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