wcscspn

 

C

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Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Date and time utilities

Strings library

Algorithms

Numerics

Input/output support

Localization support

Atomic operations (C11)

Thread support (C11)

Technical Specifications

 

Strings library

Byte strings

Multibyte strings

Wide strings

 

Null-terminated wide strings

Functions
Character manipulation
iswalnum (C95) iswalpha (C95) iswlower (C95) iswupper (C95) iswdigit (C95) iswxdigit (C95) iswblank (C99) wctype (C95) iswctype (C95)	iswcntrl (C95) iswgraph (C95) iswspace (C95) iswprint (C95) iswpunct (C95) towlower (C95) towupper (C95) wctrans (C95) towctrans (C95)
Conversions to numeric formats
wcstolwcstoll (C95)(C99) wcstoulwcstoull (C95)(C99)	wcstofwcstodwcstold (C99)(C95)(C99) wcstoimaxwcstoumax (C99)(C99)
String manipulation
wcslenwcsnlen_s (C95)(C11) wcscpywcscpy_s (C95)(C11) wcsncpywcsncpy_s (C95)(C11) wcscatwcscat_s (C95)(C11) wcsncatwcsncat_s (C95)(C11) wcsstr (C95)	wcscmp (C95) wcsncmp (C95) wcscoll (C95) wcsxfrm (C95) wcschr (C95) wcsrchr (C95) wcspbrk (C95) wcsspn (C95) wcscspn (C95) wcstokwcstok_s (C95)(C11)
Array manipulation
wmemcpywmemcpy_s (C95)(C11) wmemmovewmemmove_s (C95)(C11)	wmemcmp (C95) wmemchr (C95) wmemset (C95)

 

Defined in header <wchar.h>
size_t wcscspn( const wchar_t* dest, const wchar_t* src );		(since C95)

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 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 not found in the character string pointed to by src

References

• C11 standard (ISO/IEC 9899:2011):

• 7.29.4.5.2 The wcscspn function (p: 435-436)

• C99 standard (ISO/IEC 9899:1999):

• 7.24.4.5.2 The wcscspn function (p: 381-382)

See also

wcsspn (C95)	returns the length of the maximum initial segment that consists of only the wide characters found in another wide string (function)
wcspbrk (C95)	finds the first location of any wide character in one wide string, in another wide string (function)