std::wcsspn

 

C++

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Strings library

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Null-terminated wide strings

Functions
Character manipulation
iswalnum iswalpha iswlower iswupper iswdigit iswxdigit iswblank (C++11) wctype iswctype	iswcntrl iswgraph iswspace iswprint iswpunct towlower towupper wctrans towctrans
Conversions to numeric formats
wcstolwcstoll wcstoulwcstoull	wcstofwcstodwcstold wcstoimaxwcstouimax (C++11)(C++11)
String manipulation
wcslen wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp	wcsxfrm wcschr wcsrchr wcspbrk wcsspn wcscspn wcsstr wcstok
Array manipulation
wmemcpy
wmemmove
wmemcmp
wmemchr
wmemset

 

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 analyzed
src	-	pointer to the null-terminated wide string that contains the characters to search for

Return value

The length of the maximum initial segment that contains only characters from wide string pointed to by src

See also

wcscspn	returns the length of the maximum initial segment that consists of only the wide not found in another wide string (function)
wcspbrk	finds the first location of any wide character in one wide string, in another wide string (function)
C documentation for wcsspn