btowc - single-byte to wide-character conversion
#include <stdio.h> #include <wchar.h> wint_t btowc(int c);
The btowc() function determines whether c 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. See environ(7).
The btowc() function returns 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 returns the wide-character representation of that character.
No errors are defined.
See attributes(7) for descriptions of the following attributes: