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 behaviour of this function is affected by the LC_CTYPE category of the current locale.
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.
Derived from the ISO/IEC 9899:1990/Amendment 1:1995 (E).