C Library Header – wctype

The header <wctype.h> defines set of functions used to classify wide characters by their types or to convert between upper and lower case.

The < wctype.h> header shall define the following macro constant:

WEOF	Wide End-of-File

The < wctype.h> header shall define the following function:
Character Classification:

iswalnum	checks if a wide character is alphanumeric (C95)
iswalpha	checks if a wide character is alphabetic (C95)
iswlower	checks if a wide character is an lowercase character (C95)
iswupper	checks if a wide character is an uppercase character (C95)
iswdigit	checks if a wide character is a digit (C95)
iswxdigit	checks if a character is a hexadecimal character (C95)
iswcntrl	checks if a wide character is a control character (C95)
iswgraph	checks if a wide character is a graphical character (C95)
iswspace	checks if a wide character is a space character (C95)
iswblank	checks if a wide character is a blank character (C99)
iswprint	checks if a wide character is a printing character (C95)
iswpunct	checks if a wide character is a punctuation character (C95)
iswctype	classifies a wide character according to the specified LC_CTYPE category (C95)
wctype	looks up a character classification category in the current C locale (C95)

Character Manipulation:

towlower	converts a wide character to lowercase (C95)
towupper	converts a wide character to uppercase (C95)
towctrans	performs character mapping according to the specified LC_CTYPE mapping category (C95)
wctrans	looks up a character mapping category in the current C locale (C95)

The < wctype.h> header shall define the following type:

wchar_t	integer type that can hold any valid wide character
wint_t	integer type that can hold any valid wide character and at least one more value (C95)
wctrans_t	scalar type that holds locale-specific character mapping (C95)
wctype_t	scalar type that holds locale-specific character classification (C95)

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Related topics:
<tgmath.h>   |   <threads.h>   |   <time.h>   |   <uchar.h>   |   <wchar.h>   |   Standard Library in C

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List of topics: C Programming

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