iswxdigit

C

Language

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 <wctype.h>
int iswxdigit( wint_t ch );		(since C95)

Checks if the given wide character corresponds (if narrowed) to a hexadecimal numeric character, i.e. one of 0123456789abcdefABCDEF.

Parameters

ch

-

wide character

Return value

Non-zero value if the wide character is a hexadecimal numeric character, zero otherwise.

Notes

iswdigit and iswxdigit are the only standard wide character classification functions that are not affected by the currently installed C locale.

References

• C11 standard (ISO/IEC 9899:2011):

• 7.30.2.1.12 The iswxdigit function (p: 451)

• C99 standard (ISO/IEC 9899:1999):

• 7.25.2.1.12 The iswxdigit function (p: 397)

See also

isxdigit

checks if a character is a hexadecimal character (function)

ASCII values			characters	iscntrl iswcntrl	isprint iswprint	isspace iswspace	isblank iswblank	isgraph iswgraph	ispunct iswpunct	isalnum iswalnum	isalpha iswalpha	isupper iswupper	islower iswlower	isdigit iswdigit	isxdigit iswxdigit
decimal	hexadecimal	octal
08	\x0\x8	\0\10	control codes (NUL, etc.)	0	0	0	0	0	0	0	0	0	0	0	0
9	\x9	\11	tab (\t)	0	0	0	0	0	0	0	0	0	0	0	0
1013	\xA\xD	\12\15	whitespaces (\n, \v, \f, \r)	0	0	0	0	0	0	0	0	0	0	0	0
1431	\xE\x1F	\16\37	control codes	0	0	0	0	0	0	0	0	0	0	0	0
32	\x20	\40	space	0	0	0	0	0	0	0	0	0	0	0	0
3347	\x21\x2F	\41\57	!"#$%&'()*+,-./	0	0	0	0	0	0	0	0	0	0	0	0
4857	\x30\x39	\60\71	0123456789	0	0	0	0	0	0	0	0	0	0	0	0
5864	\x3A\x40	\72\100	:;<=>?@	0	0	0	0	0	0	0	0	0	0	0	0
6570	\x41\x46	\101\106	ABCDEF	0	0	0	0	0	0	0	0	0	0	0	0
7190	\x47\x5A	\107\132	GHIJKLMNOP QRSTUVWXYZ	0	0	0	0	0	0	0	0	0	0	0	0
9196	\x5B\x60	\133\140	[\]^_`	0	0	0	0	0	0	0	0	0	0	0	0
97102	\x61\x66	\141\146	abcdef	0	0	0	0	0	0	0	0	0	0	0	0
103122	\x67\x7A	\147\172	ghijklmnop qrstuvwxyz	0	0	0	0	0	0	0	0	0	0	0	0
123126	\x7B\x7E	\172\176	{|}~	0	0	0	0	0	0	0	0	0	0	0	0
127	\x7F	\177	backspace character (DEL)	0	0	0	0	0	0	0	0	0	0	0	0