NAME

wchar.h - wide-character types

 SYNOPSIS

#include <wchar.h>

 DESCRIPTION

The <wchar.h> header defines the following data types through

wchar_t

As described in <stddef.h>.

wint_t

An integral type capable of storing any valid value of wchar_t, or WEOF.

wctype_t

A scalar type of a data object that can hold values which represent locale-specific character classification.

mbstate_t

An object type other than an array type that can hold the conversion state information necessary to convert between sequences of (possibly multibyte) characters and wide-characters. If a codeset is being used such that an mbstate_t needs to preserve more than 2 levels of reserved state, the results are unspecified.

FILE

As described in <stdio.h>.

size_t

As described in <stddef.h>.

The <wchar.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.

wint_t            btowc(int);
int               fwprintf(FILE *, const wchar_t *, ...);
int               fwscanf(FILE *, const wchar_t *, ...);
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            fgetwc(FILE *);
wchar_t          *fgetws(wchar_t *, int, FILE *);
wint_t            fputwc(wchar_t, FILE *);
int               fputws(const wchar_t *, FILE *);
int               fwide(FILE *, int);
wint_t            getwc(FILE *);
wint_t            getwchar(void);
int               mbsinit(const mbstate_t *);
size_t            mbrlen(const char *, size_t, mbstate_t *);
size_t            mbrtowc(wchar_t *, const char *, size_t,
                      mbstate_t *);
size_t            mbsrtowcs(wchar_t *, const char **, size_t,
                      mbstate_t *);
wint_t            putwc(wchar_t, FILE *);
wint_t            putwchar(wchar_t);
int               swprintf(wchar_t *, size_t, const wchar_t *, ...);
int               swscanf(const wchar_t *, const wchar_t *, ...);
wint_t            towlower(wint_t);
wint_t            towupper(wint_t);
wint_t            ungetwc(wint_t, FILE *);
int               vfwprintf(FILE *, const wchar_t *, va_list);
int               vwprintf(const wchar_t *, va_list);
int               vswprintf(wchar_t *, size_t, const wchar_t *,
                      va_list);
size_t            wcrtomb(char *, wchar_t, mbstate_t *);
wchar_t          *wcscat(wchar_t *, const wchar_t *);
wchar_t          *wcschr(const wchar_t *, wchar_t);
int               wcscmp(const wchar_t *, const wchar_t *);
int               wcscoll(const wchar_t *, const wchar_t *);
wchar_t          *wcscpy(wchar_t *, const wchar_t *);
size_t            wcscspn(const wchar_t *, const wchar_t *);
size_t            wcsftime(wchar_t *, size_t, const wchar_t *,
                      const struct tm *);
size_t            wcslen(const wchar_t *);
wchar_t          *wcsncat(wchar_t *, const wchar_t *, size_t);
int               wcsncmp(const wchar_t *, const wchar_t *, size_t);
wchar_t          *wcsncpy(wchar_t *, const wchar_t *, size_t);
wchar_t          *wcspbrk(const wchar_t *, const wchar_t *);
wchar_t          *wcsrchr(const wchar_t *, wchar_t);
size_t            wcsrtombs(char *, const wchar_t **, size_t,
                      mbstate_t *);
size_t            wcsspn(const wchar_t *, const wchar_t *);
wchar_t          *wcsstr(const wchar_t *, const wchar_t *);
double            wcstod(const wchar_t *, wchar_t **);
wchar_t          *wcstok(wchar_t *, const wchar_t *, wchar_t **);
long int          wcstol(const wchar_t *, wchar_t **, int);
unsigned long int wcstoul(const wchar_t *, wchar_t **, int);
wchar_t          *wcswcs(const wchar_t *, const wchar_t *);
int               wcswidth(const wchar_t *, size_t);
size_t            wcsxfrm(wchar_t *, const wchar_t *, size_t);
int               wctob(wint_t);
wctype_t          wctype(const char *);
int               wcwidth(wchar_t);
wchar_t          *wmemchr(const wchar_t *, wchar_t, size_t);
int               wmemcmp(const wchar_t *, const wchar_t *, size_t);
wchar_t          *wmemcpy(wchar_t *, const wchar_t *, size_t);
wchar_t          *wmemmove(wchar_t *, const wchar_t *, size_t);
wchar_t          *wmemset(wchar_t *, wchar_t, size_t);
int               wprintf(const wchar_t *, ...);
int               wscanf(const wchar_t *, ...);

<wchar.h> defines the following macro names:

WCHAR_MAX

The maximum value representable by an object of type wchar_t.

WCHAR_MIN

The minimum value representable by an object of type wchar_t.

WEOF

Constant expression of type wint_t that is returned by several WP functions to indicate end-of-file.

NULL

As described in <stddef.h>.

The tag tm is declared as naming an incomplete structure type, the contents of which are described in the header <time.h>.

Inclusion of the <wchar.h> header may make visible all symbols from the headers <ctype.h>, <stdio.h>, <stdarg.h>, <stdlib.h>, <string.h>, <stddef.h> and <time.h>.

 APPLICATION USAGE

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

btowc(), fwprintf(), fwscanf(), iswalnum(), iswalpha(), iswcntrl(), iswdigit(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(), iswxdigit(), iswctype(), fgetwc(), fgetws(), fputwc(), fputws(), fwide(), getwc(), getwchar(), mbsinit(), mbrlen(), mbrtowc(), mbsrtowcs(), putwc(), putwchar(), swprintf(), swscanf(), towlower(), towupper(), ungetwc(), vfwprintf(), vwprintf(), vswprintf(), wcrtomb(), wcsrtombs(), wcscat(), wcschr(), wcscmp(), wcscoll(), wcscpy(), wcscspn(), wcsftime(), wcslen(), wcsncat(), wcsncmp(), wcsncpy(), wcspbrk(), wcsrchr(), wcsspn(), wcsstr(), wcstod(), wcstok(), wcstol(), wcstoul(), wcswcs(), wcswidth(), wcsxfrm(), wctob(), wctype(), wcwidth(), wmemchr(), wmemcmp(), wmemcpy(), wmemmove(), wmemset(), wprintf(), wscanf(), <ctype.h>, <stdio.h>, <stdarg.h>, <stdlib.h>, <string.h>, <stddef.h> and <time.h>.