# define istalpha(c) isalpha((unsigned char)(c))
# define istspace(c) isspace((unsigned char)(c))
# define totlower(c) tolower((unsigned char)(c))
# define istalpha(c) isalpha((unsigned char)(c))
# define istspace(c) isspace((unsigned char)(c))
# define totlower(c) tolower((unsigned char)(c))