1#include <stdio.h>
 2#include <wchar.h>
 3#include <stdlib.h>
 4#include "internal.h"
 5
 6wint_t btowc(int c)
 7{
 8	int b = (unsigned char)c;
 9	return b<128U ? b : (MB_CUR_MAX==1 && c!=EOF) ? CODEUNIT(c) : WEOF;
10}