wctype.h - wide-character classification and mapping utilities
#include <wctype.h>
The <wctype.h> header defines the following data types through
- wint_t
- As described in <wchar.h>.
- wctrans_t
A scalar type that can hold values which represent locale-specific character mappings. - wctype_t
- As described in <wchar.h>.
The <wctype.h> header declares the following as functions and may also define them as macros. Function prototypes must be provided for use with an ISO C compiler.
int iswalnum(wint_t); int iswalpha(wint_t); int iswcntrl(wint_t); int iswdigit(wint_t); int iswgraph(wint_t); int iswlower(wint_t); int iswprint(wint_t); int iswpunct(wint_t); int iswspace(wint_t); int iswupper(wint_t); int iswxdigit(wint_t); int iswctype(wint_t, wctype_t); wint_t towctrans(wint_t, wctrans_t); wint_t towlower(wint_t); wint_t towupper(wint_t); wctrans_t wctrans(const char *); wctype_t wctype(const char *);
<wctype.h> defines the following macro name:
- WEOF
- Constant expression of type wint_t that is returned by several MSE functions to indicate end-of-file.
For all functions described in this header that accept an argument of type wint_t, the value will be representable as a wchar_t or will equal the value of WEOF. If this argument has any other value, the behaviour is undefined.
The behaviour of these functions is affected by the LC_CTYPE category of the current locale.
Inclusion of the <wctype.h> header may make visible all symbols from the headers <ctype.h>, <stdio.h>, <stdarg.h>, <stdlib.h>, <string.h>, <stddef.h> <time.h>. and <wchar.h>.
None.
None.
iswalnum(), iswalpha(), iswcntrl(), iswctype(), iswdigit(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(), iswxdigit(), setlocale(), towctrans(), towlower(), towupper(), wctrans(), wctype(), <locale.h>. <wchar.h>.