int chr_map_chrs(chr_t_entry *t, char **from, int len, int *read, char **to,
int max);
char **chr_map_input(chr_t_entry *t, char **from, int len);
int chr_map_chrs(chr_t_entry *t, char **from, int len, int *read, char **to,
int max);
char **chr_map_input(chr_t_entry *t, char **from, int len);