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#include <wchar.h>
The <wchar.h> header defines the following types:
wchar_t
As described in <stddef.h>.
wint_t
An integer 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 multi-byte) characters and wide characters. If a codeset is being used such that an mbstate_t needs to preserve more than two levels of reserved state, the results are unspecified.
FILE
As described in <stdio.h>.
size_t
As described in <stddef.h>.
va_list
As described in <stdarg.h>.
The implementation supports one or more programming environments in which the width of wint_t is no greater than the width of type long. The names of these programming environments can be obtained using the confstr(3C) function or the getconf(1) utility.
The <wchar.h> header defines the following macros:
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 can make visible all symbols from the headers <ctype.h>, <string.h>, <stdarg.h>, <stddef.h>, <stdio.h>, <stdlib.h>, and <time.h>.
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Interface Stability | Standard |
getconf(1), btowc(3C), confstr(3C), fgetwc(3C), getws(3C), fputwc(3C), fputws(3C), fwide(3C), fwprintf(3C), fwscanf(3C), getwc(3C), getwchar(3C), iswalpha(3C), iswctype(3C), mbsinit(3C), mbrlen(3C), mbrtowc(3C), mbsrtowcs(3C), towlower(3C), towupper(3C), ungetwc(3C), vfwprintf(3C), wcrtomb(3C), wcsrtombs(3C), wcstring(3C), wcsstr(3C), wcstod(3C), wcscoll(3C), wcsftime(3C), wcstol(3C), wcstoul(3C), wcswidth(3C), wcsxfrm(3C), wctob(3C), wctype(3C), wcwidth(3C), wmemchr(3C), wmemcmp(3C), wmemcpy(3C), wmemmove(3C), wmemset(3C), stdarg(3EXT), stddef.h(3HEAD), stdio.h(3HEAD), stdlib.h(3HEAD), string.h(3HEAD), time.h(3HEAD), wctype.h(3HEAD), attributes(5), standards(5)