преобразование одинарных байтов в широкие символы (single byte to wide character conversion)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
btowc — single byte to wide character conversion
Синопсис (Synopsis)
#include <stdio.h>
#include <wchar.h>
wint_t btowc(int c);
Описание (Description)
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The btowc() function shall determine whether c constitutes a
valid (one-byte) character in the initial shift state.
The behavior of this function shall be affected by the LC_CTYPE
category of the current locale.
Возвращаемое значение (Return value)
The btowc() function shall return WEOF if c has the value EOF or
if (unsigned char) c does not constitute a valid (one-byte)
character in the initial shift state. Otherwise, it shall return
the wide-character representation of that character.
In the POSIX locale, btowc() shall not return WEOF if c has a
value in the range 0 to 255 inclusive.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
wctob(3p)
The Base Definitions volume of POSIX.1‐2017, stdio.h(0p),
wchar.h(0p)
