/* character-class table */
static struct cclass {
        char *name;
        char *chars;
        char *multis;
} cclasses[] = {
        { "alnum",      "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
0123456789",                            "" },
        { "alpha",      "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",
                                        "" },
        { "blank",      " \t",          "" },
        { "cntrl",      "\007\b\t\n\v\f\r\1\2\3\4\5\6\16\17\20\21\22\23\24\
\25\26\27\30\31\32\33\34\35\36\37\177", "" },
        { "digit",      "0123456789",   "" },
        { "graph",      "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~",
                                        "" },
        { "lower",      "abcdefghijklmnopqrstuvwxyz",
                                        "" },
        { "print",      "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ ",
                                        "" },
        { "punct",      "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~",
                                        "" },
        { "space",      "\t\n\v\f\r ",  "" },
        { "upper",      "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
                                        "" },
        { "xdigit",     "0123456789ABCDEFabcdef",
                                        "" },
        { NULL,         0,              "" }
};