Section 3: library functions
std::wcstok – std::wcstok Synopsis Defined in header<cwchar> wchar_t *wcstok(wchar_t *str, const wchar_t *delim, wchar_t **ptr); Finds the next token in a null-terminated wide string pointed to by str. The separator characters are identified by null-terminated wide string pointed to by delim. This function is designed to be called multiples times to obtain successive tokens from…
std::wcstoimax,std::wcstoumax – std::wcstoimax,std::wcstoumax Synopsis Defined in header <cinttypes> std::intmax_t wcstoimax( const wchar_t* nptr, wchar_t** endptr, int base ); (since C++11) std::uintmax_t wcstoumax( const wchar_t* nptr, wchar_t** endptr, int base ); (since C++11) Interprets an unsigned integer value in a wide string pointed to by nptr. Discards any whitespace characters (as identified by calling isspace()) until…
std::wcstof,std::wcstod,std::wcstold – std::wcstof,std::wcstod,std::wcstold Synopsis Defined in header <cwchar> float wcstof( const wchar_t* str, wchar_t** str_end ); (since C++11) double wcstod( const wchar_t* str, wchar_t** str_end ); long double wcstold( const wchar_t* str, wchar_t** str_end ); (since C++11) Interprets a floating point value in a wide string pointed to by str. Function discards any whitespace characters…
std::wcsstr – std::wcsstr Synopsis Defined in header<cwchar> const wchar_t *wcsstr(const wchar_t *dest, const wchar_t *src); wchar_t *wcsstr(wchar_t *dest, const wchar_t *src); Finds the first occurrence of the wide string src in the wide string pointed to by dest. The terminating null characters are not compared. Parameters dest – pointer to the null-terminated wide string to…
std::wcsspn – std::wcsspn Synopsis Defined in header<cwchar> size_t wcsspn(const wchar_t *dest, const wchar_t *src); Returns the length of the maximum initial segment of the wide string pointed to by dest, that consists of only the characters found in wide string pointed to by src. Parameters dest – pointer to the null-terminated wide string to be…
std::wcsrchr – std::wcsrchr Synopsis Defined in header<cwchar> const wchar_t *wcsrchr(const wchar_t *str, wchar_t ch); wchar_t *wcsrchr(wchar_t *str, wchar_t ch); Finds the last occurrence of the wide character ch in the wide string pointed to by str. Parameters str – pointer to the null-terminated wide string to be analyzed ch – wide character to search for…
std::wcspbrk – std::wcspbrk Synopsis Defined in header<cwchar> const wchar_t *wcspbrk(const wchar_t *dest, const wchar_t *str); wchar_t *wcspbrk(wchar_t *dest, const wchar_t *str); Finds the first character in wide string pointed to by dest, that is also in wide string pointed to by str. Parameters dest – pointer to the null-terminated wide string to be analyzed src…
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 resulting…
std::wcsncmp – std::wcsncmp Synopsis Defined in header<cwchar> int wcsncmp(const wchar_t *lhs, const wchar_t *rhs, std::size_t count); Compares at most count wide characters of two null-terminated wide strings. The comparison is done lexicographically. The sign of the result is the sign of the difference between the values of the first pair of wide characters that differ…
std::wcsncat – std::wcsncat Synopsis Defined in header<cwchar> wchar_t *wcsncat(wchar_t *dest, const wchar_t *src, std::size_t count); Appends at most count wide characters from the wide string pointed to by src to the end of the character string pointed to by dest, stopping if the null terminator is copied. The wide character src[0] replaces the null terminator…
std::wcslen – std::wcslen Synopsis Defined in header<cwchar> std::size_t wcslen(const wchar_t *str); Returns the length of a wide string, that is the number of non-null wide characters that precede the terminating null wide character. The behavior is undefined if there is no null character in the wide character array pointed to by str. Parameters str –…
std::wcsftime – std::wcsftime Synopsis Defined in header<cwchar> std::size_t wcsftime(wchar_t *str, std::size_t count, const wchar_t *format, const std::tm *time); Converts the date and time information from a given calendar time time to a null-terminated wide character string str according to format string format. Up to count wide characters are written. Parameters str – pointer to the…
std::wcscspn – std::wcscspn Synopsis Defined in header<cwchar> std::size_t wcscspn(const wchar_t *dest, const wchar_t *src); Returns the length of the maximum initial segment of the wide string pointed to by dest, that consists of only the characters not found in wide string pointed to by src. Parameters dest – pointer to the null-terminated wide string to…
std::wcscpy – std::wcscpy Synopsis Defined in header<cwchar> wchar_t *wcscpy(wchar_t *dest, const wchar_t *src); Copies the wide string pointed to by src (including the terminating null wide character) to wide character array pointed to by dest. If the strings overlap, the behavior is undefined. Parameters dest – pointer to the wide character array to copy to…
std::wcscoll – std::wcscoll Synopsis Defined in header<cwchar> int wcscoll(const wchar_t *lhs, const wchar_t *rhs); Compares two null-terminated wide strings according to the locale most recently installed by std::setlocale, as defined by the LC_COLLATE category. Parameters lhs, rhs – pointers to the null-terminated wide strings to compare Return value Negative value if lhs is less than…
std::wcscmp – std::wcscmp Synopsis Defined in header<cwchar> int wcscmp(const wchar_t *lhs, const wchar_t *rhs); Compares two null-terminated wide strings lexicographically. The sign of the result is the sign of the difference between the values of the first pair of wide characters that differ in the strings being compared. The behavior is undefined if lhs or…
std::wcschr – std::wcschr Synopsis Defined in header<cwchar> const wchar_t *wcschr(const wchar_t *str, wchar_t ch); wchar_t *wcschr(wchar_t *str, wchar_t ch); Finds the first occurrence of the wide character ch in the wide string pointed to by str. Parameters str – pointer to the null-terminated wide string to be analyzed ch – wide character to search for…
std::wcscat – std::wcscat Synopsis Defined in header<cwchar> wchar_t *wcscat(wchar_t *dest, const wchar_t *src); Appends a copy of the wide string pointed to by src to the end of the wide string pointed to by dest. The wide character src[0] replaces the null terminator at the end of dest. The resulting wide string is null-terminated. The…
std::wcrtomb – std::wcrtomb Synopsis Defined in header<cwchar> std::size_t wcrtomb(char *s, wchar_t wc, std::mbstate_t *ps); Converts a wide character to its narrow multibyte representation. If s is not a null pointer, the function determines the number of bytes necessary to store the multibyte character representation of wc (including any shift sequences, and taking into account the…
std::wbuffer_convert<Codecvt,Elem,Tr>::~wbuffer_convert – std::wbuffer_convert<Codecvt,Elem,Tr>::~wbuffer_convert Synopsis Defined in header <locale> ~wbuffer_convert(); Destroys the wbuffer_convert object and deletes the pointer to the conversion facet. Notes Some implementations are able to delete any facet, including the locale-specific facets with protected destructors. Other implementations require the facet to have a public destructor, similar to the the locale-independent facets from <codecvt>….