NAME

       unicode_category_lookup, unicode_isalnum, unicode_isalpha, unicode_isblank, unicode_isdigit,
       unicode_isgraph, unicode_islower, unicode_ispunct, unicode_isspace, unicode_isupper - unicode character
       categorization

SYNOPSIS

       #include <courier-unicode.h>

       uint32_t unicode_category_lookup(char32_t c);

       int unicode_isalnum(char32_t c);

       int unicode_isalpha(char32_t c);

       int unicode_isblank(char32_t c);

       int unicode_isdigit(char32_t c);

       int unicode_isgraph(char32_t c);

       int unicode_islower(char32_t c);

       int unicode_ispunct(char32_t c);

       int unicode_isspace(char32_t c);

       int unicode_isupper(char32_t c);

DESCRIPTION

       unicode_category_lookup() looks up the unicode character's categorization[1].  unicode_category_lookup()
       returns a 32 bit value. The value's UNICODE_CATEGORY_1 bits specify the first level of the unicode
       character's category, with UNICODE_CATEGORY_2, UNICODE_CATEGORY_3, and UNICODE_CATEGORY_4 bits specifying
       the 2nd, 3rd, and 4th level, if given. A value of 0 for each corresponding bit set indicates that no
       category is specified for this level, for this character; otherwise the possible values are defined in
       <courier-unicode.h>.

       The remaining functions implement comparable equivalents of their non-unicode versions in the standard C
       library, as follows:

       unicode_isalnum()
           Returns non-0 for all unicode_isalpha() or unicode_isdigit().

       unicode_isalpha()
           Returns non-0 for all UNICODE_CATEGORY_1_LETTER.

       unicode_isblank()
           Return non-0 for TAB, and all UNICODE_CATEGORY_2_SPACE.

       unicode_isdigit()
           Returns non-0 for all UNICODE_CATEGORY_1_NUMBER | UNICODE_CATEGORY_2_DIGIT, only (no third
           categories).

       unicode_isgraph()
           Returns non-0 for all codepoints above SPACE which are not unicode_isspace().

       unicode_islower()
           Returns non-0 for all unicode_isalpha() for which the character is equal to unicode_lc(3) of itself.

       unicode_ispunct()
           Returns non-0 for all UNICODE_CATEGORY_1_PUNCTUATION.

       unicode_isspace()
           Returns non-0 for unicode_isblank() or for unicode characters with linebreaking properties of BK, CR,
           LF, NL, and SP.

       unicode_isupper()
           Returns non-0 for all unicode_isalpha() for which the character is equal to unicode_uc(3) of itself.

SEE ALSO

       courier-unicode(7), unicode_convert_tocase(3).

AUTHOR

       Sam Varshavchik
           Author

NOTES

        1. unicode character's categorization
           http://unicode.org/notes/tn36/

Courier Unicode Library                            11/25/2020                            UNICODE_CATEGORY_LOO(3)