ctype h status

SuSv4 requires the following items in ctype.h:

• isalnum
• isalpha
• isblank
• iscntrl
• isdigit
• isgraph
• islower
• isprint
• ispunct
• isspace
• isupper
• isxdigit
• tolower
• toupper
• isascii (obsolescent)
• toascii (obsolescent)
• _toupper
• _tolower
• locale_t (missing)
• isalnum_l (missing)
• isalpha_l (missing)
• isblank_l (missing)
• iscntrl_l (missing)
• isdigit_l (missing)
• isgraph_l (missing)
• islower_l (missing)
• isprint_l (missing)
• ispunct_l (missing)
• isspace_l (missing)
• isupper_l (missing)
• isxdigit_l (missing)
• tolower_l (missing)
• toupper_l (missing)

Macros such as isalnum() do not honor the character set via setlocale(), but respond always as for the "C" locale.