(/debug "loading char.lisp!") ;; These comparison functions heavily borrowed from SBCL/CMUCL (public domain). (defun char= (character &rest more-characters) (dolist (c more-characters t) (unless (eql c character) (return nil)))) (defun char/= (character &rest more-characters) (do* ((head character (car list)) (list more-characters (cdr list))) ((null list) t) (dolist (c list) (when (eql head c) (return-from char/= nil))))) (defun char< (character &rest more-characters) (do* ((c character (car list)) (list more-characters (cdr list))) ((null list) t) (unless (< (char-int c) (char-int (car list))) (return nil)))) (defun char> (character &rest more-characters) (do* ((c character (car list)) (list more-characters (cdr list))) ((null list) t) (unless (> (char-int c) (char-int (car list))) (return nil)))) (defun char<= (character &rest more-characters) (do* ((c character (car list)) (list more-characters (cdr list))) ((null list) t) (unless (<= (char-int c) (char-int (car list))) (return nil)))) (defun char>= (character &rest more-characters) (do* ((c character (car list)) (list more-characters (cdr list))) ((null list) t) (unless (>= (char-int c) (char-int (car list))) (return nil)))) (defun equal-char-code (character) (char-code (char-upcase character))) (defun two-arg-char-equal (c1 c2) (= (equal-char-code c1) (equal-char-code c2))) (defun char-equal (character &rest more-characters) (do ((clist more-characters (cdr clist))) ((null clist) t) (unless (two-arg-char-equal (car clist) character) (return nil)))) (defun char-not-equal (character &rest more-characters) (do* ((head character (car list)) (list more-characters (cdr list))) ((null list) t) (unless (do* ((l list (cdr l))) ((null l) t) (when (two-arg-char-equal head (car l)) (return nil))) (return nil)))) (defun two-arg-char-lessp (c1 c2) (< (equal-char-code c1) (equal-char-code c2))) (defun char-lessp (character &rest more-characters) (do* ((c character (car list)) (list more-characters (cdr list))) ((null list) t) (unless (two-arg-char-lessp c (car list)) (return nil)))) (defun two-arg-char-greaterp (c1 c2) (> (equal-char-code c1) (equal-char-code c2))) (defun char-greaterp (character &rest more-characters) (do* ((c character (car list)) (list more-characters (cdr list))) ((null list) t) (unless (two-arg-char-greaterp c (car list)) (return nil)))) (defun two-arg-char-not-greaterp (c1 c2) (<= (equal-char-code c1) (equal-char-code c2))) (defun char-not-greaterp (character &rest more-characters) (do* ((c character (car list)) (list more-characters (cdr list))) ((null list) t) (unless (two-arg-char-not-greaterp c (car list)) (return nil)))) (defun two-arg-char-not-lessp (c1 c2) (>= (equal-char-code c1) (equal-char-code c2))) (defun char-not-lessp (character &rest more-characters) (do* ((c character (car list)) (list more-characters (cdr list))) ((null list) t) (unless (two-arg-char-not-lessp c (car list)) (return nil)))) (defun character (character) (cond ((characterp character) character) ((and (stringp character) (= 1 (length character))) (char character 0)) ((and (symbolp character) (= 1 (length (symbol-name character)))) (symbol-name character)) (t (error "not a valid character designator")))) ;; This list comes from SBCL: everything that's ALPHA-CHAR-P, but ;; not SB-IMPL::UCD-DECIMAL-DIGIT (to work around ), ;; then combined into a much smaller set of ranges. Yes, this can be compressed better. (defconstant +unicode-alphas+ '((65 . 90) (97 . 122) (170 . 170) (181 . 181) (186 . 186) (192 . 214) (216 . 246) (248 . 705) (710 . 721) (736 . 740) (748 . 748) (750 . 750) (880 . 884) (886 . 887) (890 . 893) (902 . 902) (904 . 906) (908 . 908) (910 . 929) (931 . 1013) (1015 . 1153) (1162 . 1317) (1329 . 1366) (1369 . 1369) (1377 . 1415) (1488 . 1514) (1520 . 1522) (1569 . 1610) (1646 . 1647) (1649 . 1747) (1749 . 1749) (1765 . 1766) (1774 . 1775) (1786 . 1788) (1791 . 1791) (1808 . 1808) (1810 . 1839) (1869 . 1957) (1969 . 1969) (1994 . 2026) (2036 . 2037) (2042 . 2042) (2048 . 2069) (2074 . 2074) (2084 . 2084) (2088 . 2088) (2308 . 2361) (2365 . 2365) (2384 . 2384) (2392 . 2401) (2417 . 2418) (2425 . 2431) (2437 . 2444) (2447 . 2448) (2451 . 2472) (2474 . 2480) (2482 . 2482) (2486 . 2489) (2493 . 2493) (2510 . 2510) (2524 . 2525) (2527 . 2529) (2544 . 2545) (2565 . 2570) (2575 . 2576) (2579 . 2600) (2602 . 2608) (2610 . 2611) (2613 . 2614) (2616 . 2617) (2649 . 2652) (2654 . 2654) (2674 . 2676) (2693 . 2701) (2703 . 2705) (2707 . 2728) (2730 . 2736) (2738 . 2739) (2741 . 2745) (2749 . 2749) (2768 . 2768) (2784 . 2785) (2821 . 2828) (2831 . 2832) (2835 . 2856) (2858 . 2864) (2866 . 2867) (2869 . 2873) (2877 . 2877) (2908 . 2909) (2911 . 2913) (2929 . 2929) (2947 . 2947) (2949 . 2954) (2958 . 2960) (2962 . 2965) (2969 . 2970) (2972 . 2972) (2974 . 2975) (2979 . 2980) (2984 . 2986) (2990 . 3001) (3024 . 3024) (3077 . 3084) (3086 . 3088) (3090 . 3112) (3114 . 3123) (3125 . 3129) (3133 . 3133) (3160 . 3161) (3168 . 3169) (3205 . 3212) (3214 . 3216) (3218 . 3240) (3242 . 3251) (3253 . 3257) (3261 . 3261) (3294 . 3294) (3296 . 3297) (3333 . 3340) (3342 . 3344) (3346 . 3368) (3370 . 3385) (3389 . 3389) (3424 . 3425) (3450 . 3455) (3461 . 3478) (3482 . 3505) (3507 . 3515) (3517 . 3517) (3520 . 3526) (3585 . 3632) (3634 . 3635) (3648 . 3654) (3713 . 3714) (3716 . 3716) (3719 . 3720) (3722 . 3722) (3725 . 3725) (3732 . 3735) (3737 . 3743) (3745 . 3747) (3749 . 3749) (3751 . 3751) (3754 . 3755) (3757 . 3760) (3762 . 3763) (3773 . 3773) (3776 . 3780) (3782 . 3782) (3804 . 3805) (3840 . 3840) (3904 . 3911) (3913 . 3948) (3976 . 3979) (4096 . 4138) (4159 . 4159) (4176 . 4181) (4186 . 4189) (4193 . 4193) (4197 . 4198) (4206 . 4208) (4213 . 4225) (4238 . 4238) (4256 . 4293) (4304 . 4346) (4348 . 4348) (4352 . 4680) (4682 . 4685) (4688 . 4694) (4696 . 4696) (4698 . 4701) (4704 . 4744) (4746 . 4749) (4752 . 4784) (4786 . 4789) (4792 . 4798) (4800 . 4800) (4802 . 4805) (4808 . 4822) (4824 . 4880) (4882 . 4885) (4888 . 4954) (4992 . 5007) (5024 . 5108) (5121 . 5740) (5743 . 5759) (5761 . 5786) (5792 . 5866) (5888 . 5900) (5902 . 5905) (5920 . 5937) (5952 . 5969) (5984 . 5996) (5998 . 6000) (6016 . 6067) (6103 . 6103) (6108 . 6108) (6176 . 6263) (6272 . 6312) (6314 . 6314) (6320 . 6389) (6400 . 6428) (6480 . 6509) (6512 . 6516) (6528 . 6571) (6593 . 6599) (6656 . 6678) (6688 . 6740) (6823 . 6823) (6917 . 6963) (6981 . 6987) (7043 . 7072) (7086 . 7087) (7168 . 7203) (7245 . 7247) (7258 . 7293) (7401 . 7404) (7406 . 7409) (7424 . 7615) (7680 . 7957) (7960 . 7965) (7968 . 8005) (8008 . 8013) (8016 . 8023) (8025 . 8025) (8027 . 8027) (8029 . 8029) (8031 . 8061) (8064 . 8116) (8118 . 8124) (8126 . 8126) (8130 . 8132) (8134 . 8140) (8144 . 8147) (8150 . 8155) (8160 . 8172) (8178 . 8180) (8182 . 8188) (8305 . 8305) (8319 . 8319) (8336 . 8340) (8450 . 8450) (8455 . 8455) (8458 . 8467) (8469 . 8469) (8473 . 8477) (8484 . 8484) (8486 . 8486) (8488 . 8488) (8490 . 8493) (8495 . 8505) (8508 . 8511) (8517 . 8521) (8526 . 8526) (8579 . 8580) (11264 . 11310) (11312 . 11358) (11360 . 11492) (11499 . 11502) (11520 . 11557) (11568 . 11621) (11631 . 11631) (11648 . 11670) (11680 . 11686) (11688 . 11694) (11696 . 11702) (11704 . 11710) (11712 . 11718) (11720 . 11726) (11728 . 11734) (11736 . 11742) (11823 . 11823) (12293 . 12294) (12337 . 12341) (12347 . 12348) (12353 . 12438) (12445 . 12447) (12449 . 12538) (12540 . 12543) (12549 . 12589) (12593 . 12686) (12704 . 12727) (12784 . 12799) (13312 . 19893) (19968 . 40907) (40960 . 42124) (42192 . 42237) (42240 . 42508) (42512 . 42527) (42538 . 42539) (42560 . 42591) (42594 . 42606) (42623 . 42647) (42656 . 42725) (42775 . 42783) (42786 . 42888) (42891 . 42892) (43003 . 43009) (43011 . 43013) (43015 . 43018) (43020 . 43042) (43072 . 43123) (43138 . 43187) (43250 . 43255) (43259 . 43259) (43274 . 43301) (43312 . 43334) (43360 . 43388) (43396 . 43442) (43471 . 43471) (43520 . 43560) (43584 . 43586) (43588 . 43595) (43616 . 43638) (43642 . 43642) (43648 . 43695) (43697 . 43697) (43701 . 43702) (43705 . 43709) (43712 . 43712) (43714 . 43714) (43739 . 43741) (43968 . 44002) (44032 . 55203) (55216 . 55238) (55243 . 55291) (63744 . 64045) (64048 . 64109) (64112 . 64217) (64256 . 64262) (64275 . 64279) (64285 . 64285) (64287 . 64296) (64298 . 64310) (64312 . 64316) (64318 . 64318) (64320 . 64321) (64323 . 64324) (64326 . 64433) (64467 . 64829) (64848 . 64911) (64914 . 64967) (65008 . 65019) (65136 . 65140) (65142 . 65276) (65313 . 65338) (65345 . 65370) (65382 . 65470) (65474 . 65479) (65482 . 65487) (65490 . 65495) (65498 . 65500) (65536 . 65547) (65549 . 65574) (65576 . 65594) (65596 . 65597) (65599 . 65613) (65616 . 65629) (65664 . 65786) (66176 . 66204) (66208 . 66256) (66304 . 66334) (66352 . 66368) (66370 . 66377) (66432 . 66461) (66464 . 66499) (66504 . 66511) (66560 . 66717) (67584 . 67589) (67592 . 67592) (67594 . 67637) (67639 . 67640) (67644 . 67644) (67647 . 67669) (67840 . 67861) (67872 . 67897) (68096 . 68096) (68112 . 68115) (68117 . 68119) (68121 . 68147) (68192 . 68220) (68352 . 68405) (68416 . 68437) (68448 . 68466) (68608 . 68680) (69763 . 69807) (73728 . 74606) (77824 . 78894) (119808 . 119892) (119894 . 119964) (119966 . 119967) (119970 . 119970) (119973 . 119974) (119977 . 119980) (119982 . 119993) (119995 . 119995) (119997 . 120003) (120005 . 120069) (120071 . 120074) (120077 . 120084) (120086 . 120092) (120094 . 120121) (120123 . 120126) (120128 . 120132) (120134 . 120134) (120138 . 120144) (120146 . 120485) (120488 . 120512) (120514 . 120538) (120540 . 120570) (120572 . 120596) (120598 . 120628) (120630 . 120654) (120656 . 120686) (120688 . 120712) (120714 . 120744) (120746 . 120770) (120772 . 120779) (131072 . 173782) (173824 . 177972) (194560 . 195101)) "(Start . End) ranges of codepoints for alphabetic characters, as of Unicode 6.2.") (defun alpha-char-p (char) (let ((code (char-code char))) (dolist (alpha-pair +unicode-alphas+) (when (<= (car alpha-pair) code (cdr alpha-pair)) (return-from alpha-char-p t))) nil)) (defun alphanumericp (char) ;; from the hyperspec: (or (alpha-char-p char) (not (null (digit-char-p char))))) ;; I made this list by running DIGIT-CHAR-P in SBCL on every codepoint up to CHAR-CODE-LIMIT, ;; filtering on only those with SB-IMPL::UCD-GENERAL-CATEGORY 12 (Nd), and then grouping ;; consecutive sets. There's 37 spans of 10, plus 1 extra digit (6618). (defconstant +unicode-zeroes+ '(48 1632 1776 1984 2406 2534 2662 2790 2918 3046 3174 3302 3430 3664 3792 3872 4160 4240 6112 6160 6470 6608 6784 6800 6992 7088 7232 7248 42528 43216 43264 43472 43600 44016 65296 66720 120782) "Unicode codepoints which have Digit value 0, followed by 1, 2, ..., 9, as of Unicode 6.2") ;; The "Digit value" of a (Unicode) character, or NIL, if it doesn't have one. (defun unicode-digit-value (char) (let ((code (char-code char))) (if (= code 6618) 1 ;; it's special! (dolist (z +unicode-zeroes+) (when (<= z code (+ z 9)) (return-from unicode-digit-value (- code z))))))) ;; from SBCL/CMUCL: (defun digit-char (weight &optional (radix 10)) "All arguments must be integers. Returns a character object that represents a digit of the given weight in the specified radix. Returns NIL if no such character exists." (and ;; (typep weight 'fixnum) (>= weight 0) (< weight radix) (< weight 36) (code-char (if (< weight 10) (+ 48 weight) (+ 55 weight))))) ;; From comment #4 on : (defun digit-char-p (char &optional (radix 10)) "Includes ASCII 0-9 a-z A-Z, plus Unicode HexDigit characters (fullwidth variants of 0-9 and A-F)." (let* ((number (unicode-digit-value char)) (code (char-code char)) (upper (char-upcase char)) (code-upper (char-code upper)) (potential (cond (number number) ((char<= #\0 char #\9) (- code (char-code #\0))) ((<= 65296 code 65305) ;; FULLWIDTH_DIGIT_ZERO, FULLWIDTH_DIGIT_NINE (- code 65296)) ((char<= #\A upper #\Z) (+ 10 (- code-upper (char-code #\A)))) ((<= 65313 (char-code upper) 65318) ;; FULLWIDTH_LATIN_CAPITAL_LETTER_A, FULLWIDTH_LATIN_CAPITAL_LETTER_F (+ 10 (- code-upper 65313))) (t nil)))) (if (and potential (< potential radix)) potential nil))) (defun graphic-char-p (char) ;; from SBCL/CMUCL: (let ((n (char-code char))) (or (< 31 n 127) (< 159 n)))) (defun standard-char-p (char) ;; from SBCL/CMUCL: (and (let ((n (char-code char))) (or (< 31 n 127) (= n 10))))) (defun upper-case-p (character) (char/= character (char-downcase character))) (defun lower-case-p (character) (char/= character (char-upcase character))) (defun both-case-p (character) (or (upper-case-p character) (lower-case-p character))) (defun char-int (character) ;; no implementation-defined character attributes (char-code character)) (defconstant char-code-limit 1114111) ;; 0x10FFFF (defconstant +ascii-names+ #("NULL" "START_OF_HEADING" "START_OF_TEXT" "END_OF_TEXT" "END_OF_TRANSMISSION" "ENQUIRY" "ACKNOWLEDGE" "BELL" "Backspace" "Tab" "Newline" "LINE_TABULATION" "Page" "Return" "SHIFT_OUT" "SHIFT_IN" "DATA_LINK_ESCAPE" "DEVICE_CONTROL_ONE" "DEVICE_CONTROL_TWO" "DEVICE_CONTROL_THREE" "DEVICE_CONTROL_FOUR" "NEGATIVE_ACKNOWLEDGE" "SYNCHRONOUS_IDLE" "END_OF_TRANSMISSION_BLOCK" "CANCEL" "END_OF_MEDIUM" "SUBSTITUTE" "ESCAPE" "INFORMATION_SEPARATOR_FOUR" "INFORMATION_SEPARATOR_THREE" "INFORMATION_SEPARATOR_TWO" "INFORMATION_SEPARATOR_ONE" "Space" "EXCLAMATION_MARK" "QUOTATION_MARK" "NUMBER_SIGN" "DOLLAR_SIGN" "PERCENT_SIGN" "AMPERSAND" "APOSTROPHE" "LEFT_PARENTHESIS" "RIGHT_PARENTHESIS" "ASTERISK" "PLUS_SIGN" "COMMA" "HYPHEN-MINUS" "FULL_STOP" "SOLIDUS" "DIGIT_ZERO" "DIGIT_ONE" "DIGIT_TWO" "DIGIT_THREE" "DIGIT_FOUR" "DIGIT_FIVE" "DIGIT_SIX" "DIGIT_SEVEN" "DIGIT_EIGHT" "DIGIT_NINE" "COLON" "SEMICOLON" "LESS-THAN_SIGN" "EQUALS_SIGN" "GREATER-THAN_SIGN" "QUESTION_MARK" "COMMERCIAL_AT" "LATIN_CAPITAL_LETTER_A" "LATIN_CAPITAL_LETTER_B" "LATIN_CAPITAL_LETTER_C" "LATIN_CAPITAL_LETTER_D" "LATIN_CAPITAL_LETTER_E" "LATIN_CAPITAL_LETTER_F" "LATIN_CAPITAL_LETTER_G" "LATIN_CAPITAL_LETTER_H" "LATIN_CAPITAL_LETTER_I" "LATIN_CAPITAL_LETTER_J" "LATIN_CAPITAL_LETTER_K" "LATIN_CAPITAL_LETTER_L" "LATIN_CAPITAL_LETTER_M" "LATIN_CAPITAL_LETTER_N" "LATIN_CAPITAL_LETTER_O" "LATIN_CAPITAL_LETTER_P" "LATIN_CAPITAL_LETTER_Q" "LATIN_CAPITAL_LETTER_R" "LATIN_CAPITAL_LETTER_S" "LATIN_CAPITAL_LETTER_T" "LATIN_CAPITAL_LETTER_U" "LATIN_CAPITAL_LETTER_V" "LATIN_CAPITAL_LETTER_W" "LATIN_CAPITAL_LETTER_X" "LATIN_CAPITAL_LETTER_Y" "LATIN_CAPITAL_LETTER_Z" "LEFT_SQUARE_BRACKET" "REVERSE_SOLIDUS" "RIGHT_SQUARE_BRACKET" "CIRCUMFLEX_ACCENT" "LOW_LINE" "GRAVE_ACCENT" "LATIN_SMALL_LETTER_A" "LATIN_SMALL_LETTER_B" "LATIN_SMALL_LETTER_C" "LATIN_SMALL_LETTER_D" "LATIN_SMALL_LETTER_E" "LATIN_SMALL_LETTER_F" "LATIN_SMALL_LETTER_G" "LATIN_SMALL_LETTER_H" "LATIN_SMALL_LETTER_I" "LATIN_SMALL_LETTER_J" "LATIN_SMALL_LETTER_K" "LATIN_SMALL_LETTER_L" "LATIN_SMALL_LETTER_M" "LATIN_SMALL_LETTER_N" "LATIN_SMALL_LETTER_O" "LATIN_SMALL_LETTER_P" "LATIN_SMALL_LETTER_Q" "LATIN_SMALL_LETTER_R" "LATIN_SMALL_LETTER_S" "LATIN_SMALL_LETTER_T" "LATIN_SMALL_LETTER_U" "LATIN_SMALL_LETTER_V" "LATIN_SMALL_LETTER_W" "LATIN_SMALL_LETTER_X" "LATIN_SMALL_LETTER_Y" "LATIN_SMALL_LETTER_Z" "LEFT_CURLY_BRACKET" "VERTICAL_LINE" "RIGHT_CURLY_BRACKET" "TILDE" "Rubout") "Names/codepoints of the first 128 characters from Unicode 6.2, except with Common Lisp's suggested changes. For the first 32 characters ('C0 controls'), the first 'Commonly used alternative alias' is used -- note that this differs from SBCL, which uses abbreviations.") ;; I hope being slightly different from SBCL doesn't bite me down the road. ;; I'll figure out a good way to add the other 21701 names later. (defun char-name (char) ;; For consistency, I'm using the SBCL convention of the Unicode ;; name, with spaces as underscores. It would be nice to use ;; their "Uxxxx" convention for names I don't know, but there's ;; not much in FORMAT yet. I'm only implementing ASCII names right ;; now, since Unicode is kind of big. (let ((code (char-code char))) (if (<= code 127) (aref +ascii-names+ code) nil))) ;; for now, no name (defun name-char (name) (let ((name-upcase (string-upcase (string name)))) (dotimes (i (length +ascii-names+)) (when (string= name-upcase (string-upcase (aref +ascii-names+ i))) ;; poor man's STRING-EQUAL (return-from name-char (code-char i)))) nil))