#define error_if(x) if (x) error(__FILE__, __LINE__)
void error(const char *file, int line);

void init(void);
void display(void);
void mouse(int button, int state, int x, int y);

int load_ascii(const char *filename);
int load_kanji(const char *filename);
const unsigned char *ascii(int c);
const unsigned char *kanji(int c1, int c2);