btowc() -- determine if character is a valid character in initial shift state

SYNOPSIS

#include <stdio.h>

#include <wchar.h>

wint_t btowc(int c);

The btowc() function determines whether the specified character constitutes a valid (one-byte) character in the initial shift state. The behavior of this function is affected by the LC_CTYPE category of the current locale.

PARAMETERS

c: Is the character to test.

RETURN VALUES

The btowc() function returns WEOF if c has the value EOF or if c does not constitute a valid (one-byte) character in the initial shift state. Otherwise, it returns the wide character representation of the character.