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cleanup of code related to xfree(), better KKCC backtrace capabilities, document XD_INLINE_LISP_OBJECT_BLOCK_PTR, fix some memory leaks, other code cleanup -------------------- ChangeLog entries follow: -------------------- src/ChangeLog addition: 2010-03-24 Ben Wing <ben@xemacs.org> * array.h: * array.h (XD_LISP_DYNARR_DESC): * dumper.c (pdump_register_sub): * dumper.c (pdump_store_new_pointer_offsets): * dumper.c (pdump_reloc_one_mc): * elhash.c: * gc.c (lispdesc_one_description_line_size): * gc.c (kkcc_marking): * lrecord.h: * lrecord.h (IF_NEW_GC): * lrecord.h (enum memory_description_type): * lrecord.h (enum data_description_entry_flags): * lrecord.h (struct opaque_convert_functions): Rename XD_LISP_OBJECT_BLOCK_PTR to XD_INLINE_LISP_OBJECT_BLOCK_PTR and document it in lrecord.h. * data.c: * data.c (finish_marking_weak_lists): * data.c (continue_marking_ephemerons): * data.c (finish_marking_ephemerons): * elhash.c (MARK_OBJ): * gc.c: * gc.c (lispdesc_indirect_count_1): * gc.c (struct): * gc.c (kkcc_bt_push): * gc.c (kkcc_gc_stack_push): * gc.c (kkcc_gc_stack_push_lisp_object): * gc.c (kkcc_gc_stack_repush_dirty_object): * gc.c (KKCC_DO_CHECK_FREE): * gc.c (mark_object_maybe_checking_free): * gc.c (mark_struct_contents): * gc.c (mark_lisp_object_block_contents): * gc.c (register_for_finalization): * gc.c (mark_object): * gc.h: * lisp.h: * profile.c: * profile.c (mark_profiling_info_maphash): Clean up KKCC code related to DEBUG_XEMACS. Rename kkcc_backtrace() to kkcc_backtrace_1() and add two params: a `size' arg to control how many stack elements to print and a `detailed' arg to control whether Lisp objects are printed using `debug_print()'. Create front-ends to kkcc_backtrace_1() -- kkcc_detailed_backtrace(), kkcc_short_backtrace(), kkcc_detailed_backtrace_full(), kkcc_short_backtrace_full(), as well as shortened versions kbt(), kbts(), kbtf(), kbtsf() -- to call it with various parameter values. Add an `is_lisp' field to the stack and backtrace structures and use it to keep track of whether an object pushed onto the stack is a Lisp object or a non-Lisp structure; in kkcc_backtrace_1(), don't try to print a non-Lisp structure as a Lisp object. * elhash.c: * extents.c: * file-coding.c: * lrecord.h: * lrecord.h (IF_NEW_GC): * marker.c: * marker.c (Fmarker_buffer): * mule-coding.c: * number.c: * rangetab.c: * specifier.c: New macros IF_OLD_GC(), IF_NEW_GC() to simplify declaration of Lisp objects when a finalizer may exist in one but not the other. Use them appropriately. * extents.c (finalize_extent_info): Don't zero out data->soe and data->extents before trying to free, else we get memory leaks. * lrecord.h (enum lrecord_type): Make the first lrecord type have value 1 not 0 so that 0 remains without implementation and attempts to interpret zeroed memory as a Lisp object will be more obvious. * array.c (Dynarr_free): * device-msw.c (msprinter_delete_device): * device-tty.c (free_tty_device_struct): * device-tty.c (tty_delete_device): * dialog-msw.c (handle_directory_dialog_box): * dialog-x.c: * emacs.c (free_argc_argv): * emodules.c (attempt_module_delete): * file-coding.c (chain_finalize_coding_stream_1): * file-coding.c (chain_finalize_coding_stream): * glyphs-eimage.c: * glyphs-eimage.c (jpeg_instantiate_unwind): * glyphs-eimage.c (gif_instantiate_unwind): * glyphs-eimage.c (png_instantiate_unwind): * glyphs-eimage.c (tiff_instantiate_unwind): * imgproc.c: * imgproc.c (build_EImage_quantable): * insdel.c (uninit_buffer_text): * mule-coding.c (iso2022_finalize_detection_state): * objects-tty.c (tty_finalize_color_instance): * objects-tty.c (tty_finalize_font_instance): * objects-tty.c (tty_font_list): * process.c: * process.c (finalize_process): * redisplay.c (add_propagation_runes): * scrollbar-gtk.c: * scrollbar-gtk.c (gtk_free_scrollbar_instance): * scrollbar-gtk.c (gtk_release_scrollbar_instance): * scrollbar-msw.c: * scrollbar-msw.c (mswindows_free_scrollbar_instance): * scrollbar-msw.c (unshow_that_mofo): * scrollbar-x.c (x_free_scrollbar_instance): * scrollbar-x.c (x_release_scrollbar_instance): * select-x.c: * select-x.c (x_handle_selection_request): * syntax.c: * syntax.c (uninit_buffer_syntax_cache): * text.h (eifree): If possible, whenever we call xfree() on a field in a structure, set the field to 0 afterwards. A lot of code is written so that it checks the value being freed to see if it is non-zero before freeing it -- doing this and setting the value to 0 afterwards ensures (a) we won't try to free twice if the cleanup code is called twice; (b) if the object itself stays around, KKCC won't crash when attempting to mark the freed field. * rangetab.c: Add a finalization method when not NEW_GC to avoid memory leaks. (#### We still get memory leaks when NEW_GC; need to convert gap array to Lisp object).
author Ben Wing <ben@xemacs.org>
date Wed, 24 Mar 2010 01:22:51 -0500
parents 72d64d886449
children 3889ef128488 308d34e9f07d
line wrap: on
line source

;;; lao-util.el --- utilities for Lao -*- coding: iso-2022-7bit; -*-

;; Copyright (C) 1997 Electrotechnical Laboratory, JAPAN.
;; Licensed to the Free Software Foundation.

;; Keywords: multilingual, Lao

;; This file is part of XEmacs.

;; XEmacs is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; XEmacs is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;; General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with XEmacs; see the file COPYING.  If not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.

;;; Synched up with: Emacs 21.1 (language/lao-util.el).

;;; Commentary:

;;; Code:

;; Setting information of Thai characters.

(defconst lao-category-table (make-category-table))
(define-category ?c "Lao consonant" lao-category-table)
(define-category ?s "Lao semi-vowel" lao-category-table)
(define-category ?v "Lao upper/lower vowel" lao-category-table)
(define-category ?t "Lao tone" lao-category-table)

(let ((l '((?(1!(B consonant "LETTER KOR  KAI'" "CHICKEN")
	   (?(1"(B consonant "LETTER KHOR KHAI'" "EGG")
	   (?(1#(B invalid nil)
	   (?(1$(B consonant "LETTER QHOR QHWARGN" "BUFFALO")
	   (?(1%(B invalid nil)
	   (?  invalid nil)
	   (?(1'(B consonant "LETTER NGOR NGUU" "SNAKE")
	   (?(1((B consonant "LETTER JOR JUA" "BUDDHIST NOVICE")
	   (?(1)(B invalid nil)
	   (?(1*(B consonant "LETTER XOR X\"ARNG" "ELEPHANT")
	   (?(1+(B invalid nil)
	   (?(1,(B invalid nil)
	   (?(1-(B consonant "LETTER YOR YUNG" "MOSQUITO")
	   (?(1.(B invalid nil)
	   (?(1.(B invalid nil)
	   (?(1.(B invalid nil)
	   (?(1.(B invalid nil)
	   (?(1.(B invalid nil)
	   (?(1.(B invalid nil)
	   (?(14(B consonant "LETTER DOR DANG" "NOSE")
	   (?(15(B consonant "LETTER TOR TAR" "EYE")
	   (?(16(B consonant "LETTER THOR THUNG" "TO ASK,QUESTION")
	   (?(17(B consonant "LETTER DHOR DHARM" "FLAG")
	   (?(18(B invalid nil)
	   (?(19(B consonant "LETTER NOR NOK" "BIRD")
	   (?(1:(B consonant "LETTER BOR BED" "FISHHOOK")
	   (?(1;(B consonant "LETTER POR PAR" "FISH")
	   (?(1<(B consonant "LETTER HPOR HPER\"" "BEE")
	   (?(1=(B consonant "LETTER FHOR FHAR" "WALL")
	   (?(1>(B consonant "LETTER PHOR PHUU" "MOUNTAIN")
	   (?(1?(B consonant "LETTER FOR FAI" "FIRE")
	   (?(1@(B invalid nil)
	   (?(1A(B consonant "LETTER MOR MAR\"" "HORSE")
	   (?(1B(B consonant "LETTER GNOR GNAR" "MEDICINE")
	   (?(1C(B consonant "LETTER ROR ROD" "CAR")
	   (?(1D(B invalid nil)
	   (?(1E(B consonant "LETTER LOR LIING" "MONKEY")
	   (?(1F(B invalid nil)
	   (?(1G(B consonant "LETTER WOR WII" "HAND FAN")
	   (?(1H(B invalid nil)
	   (?(1I(B invalid nil)
	   (?(1J(B consonant "LETTER SOR SEA" "TIGER")
	   (?(1K(B consonant "LETTER HHOR HHAI" "JAR")
	   (?(1L(B invalid nil)
	   (?(1M(B consonant "LETTER OR OOW" "TAKE")
	   (?(1N(B consonant "LETTER HOR HEA" "BOAT")
	   (?(1O(B special "ELLIPSIS")
	   (?(1P(B vowel-base "VOWEL SIGN SARA A")
	   (?(1Q(B vowel-upper "VOWEL SIGN MAI KAN")
	   (?(1R(B vowel-base "VOWEL SIGN SARA AR")
	   (?(1S(B vowel-base "VOWEL SIGN SARA AM")
	   (?(1T(B vowel-upper "VOWEL SIGN SARA I") 
	   (?(1U(B vowel-upper "VOWEL SIGN SARA II")
	   (?(1V(B vowel-upper "VOWEL SIGN SARA EU")
	   (?(1W(B vowel-upper "VOWEL SIGN SARA UR")
	   (?(1X(B vowel-lower "VOWEL SIGN SARA U")
	   (?(1Y(B vowel-lower "VOWEL SIGN SARA UU")
	   (?(1Z(B invalid nil)
	   (?(1[(B vowel-upper "VOWEL SIGN MAI KONG")
	   (?(1\(B semivowel-lower "SEMIVOWEL SIGN LO")
	   (?(1](B vowel-base "SEMIVOWEL SIGN SARA IA")
	   (?(1^(B invalid nil)
	   (?(1_(B invalid nil)
	   (?(1`(B vowel-base "VOWEL SIGN SARA EE")
	   (?(1a(B vowel-base "VOWEL SIGN SARA AA")
	   (?(1b(B vowel-base "VOWEL SIGN SARA OO")
	   (?(1c(B vowel-base "VOWEL SIGN SARA EI MAI MUAN\"")
	   (?(1d(B vowel-base "VOWEL SIGN SARA AI MAI MAY")
	   (?(1e(B invalid nil)
	   (?(1f(B special "KO LA (REPETITION)") 
	   (?(1g(B invalid nil)
	   (?(1h(B tone "TONE MAI EK")
	   (?(1i(B tone "TONE MAI THO")
	   (?(1j(B tone "TONE MAI TI")
	   (?(1k(B tone "TONE MAI JADTAWAR")
	   (?(1l(B tone "CANCELLATION MARK")
	   (?(1m(B vowel-upper "VOWEL SIGN SARA OR")
	   (?(1n(B invalid nil)
	   (?(1o(B invalid nil)
	   (?(1p(B special "DIGIT ZERO")
	   (?(1q(B special "DIGIT ONE")
	   (?(1r(B special "DIGIT TWO")
	   (?(1s(B special "DIGIT THREE")
	   (?(1t(B special "DIGIT FOUR")
	   (?(1u(B special "DIGIT FIVE")
	   (?(1v(B special "DIGIT SIX")
	   (?(1w(B special "DIGIT SEVEN")
	   (?(1x(B special "DIGIT EIGHT")
	   (?(1y(B special "DIGIT NINE")
	   (?(1z(B invalid nil)
	   (?(1{(B invalid nil)
	   (?(1|(B consonant "LETTER NHOR NHUU" "MOUSE")
	   (?(1}(B consonant "LETTER MHOR MHAR" "DOG")
	   (?(1~(B invalid nil)
	   ))
      elm)
  (while l
    (setq elm (car l) l (cdr l))
    (let ((char (car elm))
	  (ptype (nth 1 elm)))
      (cond ((eq ptype 'consonant)
	     (modify-category-entry char ?c lao-category-table))
	    ((memq ptype '(vowel-upper vowel-lower))
	     (modify-category-entry char ?v lao-category-table))
	    ((eq ptype 'semivowel-lower)
	     (modify-category-entry char ?s lao-category-table))
	    ((eq ptype 'tone)
	     (modify-category-entry char ?t lao-category-table)))
      (put-char-code-property char 'phonetic-type ptype)
      (put-char-code-property char 'name (nth 2 elm))
      (put-char-code-property char 'meaning (nth 3 elm)))))

;; The general composing rules are as follows:
;;
;;                          T
;;       V        T         V                  T
;; CV -> C, CT -> C, CVT -> C, Cv -> C, CvT -> C
;;                                   v         v
;;                             T
;;        V         T          V                   T
;; CsV -> C, CsT -> C, CsVT -> C, Csv -> C, CvT -> C
;;        s         s          s         s         s
;;                                       v         v


;; where C: consonant, V: vowel upper, v: vowel lower,
;;       T: tone mark, s: semivowel lower

(defvar lao-composition-pattern
  "\\cc\\(\\ct\\|\\cv\\ct?\\|\\cs\\(\\ct\\|\\cv\\ct?\\)?\\)"
  "Regular expression matching a Lao composite sequence.")

;;;###autoload
(defun lao-compose-string (str)
  (with-category-table lao-category-table
   (let ((idx 0))
     (while (setq idx (string-match lao-composition-pattern str idx))
       (compose-string str idx (match-end 0))
       (setq idx (match-end 0))))
   str))

;;; LRT: Lao <-> Roman Transcription

;; Upper vowels and tone-marks are put on the letter.
;; Semi-vowel-sign-lo and lower vowels are put under the letter.

(defconst lao-transcription-consonant-alist
  (sort '(;; single consonants
	  ("k" . "(1!(B")
	  ("kh" . "(1"(B")
	  ("qh" . "(1$(B")
	  ("ng" . "(1'(B")
	  ("j" . "(1((B")
	  ("s" . "(1J(B")
	  ("x" . "(1*(B")
	  ("y" . "(1-(B")
	  ("d" . "(14(B")
	  ("t" . "(15(B")
	  ("th" . "(16(B")
	  ("dh" . "(17(B")
	  ("n" . "(19(B")
	  ("b" . "(1:(B")
	  ("p" . "(1;(B")
	  ("hp" . "(1<(B")
	  ("fh" . "(1=(B")
	  ("ph" . "(1>(B")
	  ("f" . "(1?(B")
	  ("m" . "(1A(B")
	  ("gn" . "(1B(B")
	  ("l" . "(1E(B")
	  ("r" . "(1C(B")
	  ("v" . "(1G(B")
	  ("w" . "(1G(B")
	  ("hh" . "(1K(B")
	  ("O" . "(1M(B")
	  ("h" . "(1N(B")
	  ("nh" . "(1|(B")
	  ("mh" . "(1}(B")
	  ("lh" . ["(1K\(B"])
	  ;; double consonants
	  ("ngh" . ["(1K'(B"])
	  ("yh" . ["(1K](B"])
	  ("wh" . ["(1KG(B"])
	  ("hl" . ["(1KE(B"])
	  ("hy" . ["(1K-(B"])
	  ("hn" . ["(1K9(B"])
	  ("hm" . ["(1KA(B"])
	  )
	(function (lambda (x y) (> (length (car x)) (length (car y)))))))

(defconst lao-transcription-semi-vowel-alist
  '(("r" . "(1\(B")))

(defconst lao-transcription-vowel-alist
  (sort '(("a" . "(1P(B")
	  ("ar" . "(1R(B")
	  ("i" . "(1T(B")
	  ("ii" . "(1U(B")
	  ("eu" . "(1V(B")
	  ("ur" . "(1W(B")
	  ("u" . "(1X(B")
	  ("uu" . "(1Y(B")
	  ("e" . ["(1`P(B"])
	  ("ee" . "(1`(B")
	  ("ae" . ["(1aP(B"])
	  ("aa" . "(1a(B")
	  ("o" . ["(1bP(B"])
	  ("oo" . "(1b(B")
	  ("oe" . ["(1`RP(B"])
	  ("or" . "(1m(B")
	  ("er" . ["(1`T(B"])
	  ("ir" . ["(1`U(B"])
	  ("ua" . ["(1[GP(B"])
	  ("uaa" . ["(1[G(B"])
	  ("ie" . ["(1`Q]P(B"])
	  ("ia" . ["(1`Q](B"])
	  ("ea" . ["(1`VM(B"])
	  ("eaa" . ["(1`WM(B"])
	  ("ai" . "(1d(B")
	  ("ei" . "(1c(B")
	  ("ao" . ["(1`[R(B"])
	  ("aM" . "(1S(B"))
	(function (lambda (x y) (> (length (car x)) (length (car y)))))))

;; Maa-sakod is put at the tail.
(defconst lao-transcription-maa-sakod-alist
  '(("k" . "(1!(B")
    ("g" . "(1'(B")
    ("y" . "(1-(B")
    ("d" . "(14(B")
    ("n" . "(19(B")
    ("b" . "(1:(B")
    ("m" . "(1A(B")
    ("v" . "(1G(B")
    ("w" . "(1G(B")
    ))

(defconst lao-transcription-tone-alist
  '(("'" . "(1h(B")
    ("\"" . "(1i(B")
    ("^" . "(1j(B")
    ("+" . "(1k(B")
    ("~" . "(1l(B")))

(defconst lao-transcription-punctuation-alist
  '(("\\0" . "(1p(B")
    ("\\1" . "(1q(B")
    ("\\2" . "(1r(B")
    ("\\3" . "(1s(B")
    ("\\4" . "(1t(B")
    ("\\5" . "(1u(B")
    ("\\6" . "(1v(B")
    ("\\7" . "(1w(B")
    ("\\8" . "(1x(B")
    ("\\9" . "(1y(B")
    ("\\\\" . "(1f(B")
    ("\\$" . "(1O(B")))

(defconst lao-transcription-pattern
  (concat
   "\\("
   (mapconcat 'car lao-transcription-consonant-alist "\\|")
   "\\)\\("
   (mapconcat 'car lao-transcription-semi-vowel-alist "\\|")
   "\\)?\\(\\("
   (mapconcat 'car lao-transcription-vowel-alist "\\|")
   "\\)\\("
   (mapconcat 'car lao-transcription-maa-sakod-alist "\\|")
   "\\)?\\("
   (mapconcat (lambda (x) (regexp-quote (car x)))
	      lao-transcription-tone-alist "\\|")
   "\\)?\\)?\\|"
   (mapconcat (lambda (x) (regexp-quote (car x)))
	      lao-transcription-punctuation-alist "\\|")
   )
  "Regexp of Roman transcription pattern for one Lao syllable.")

;; regexp-opt is in packages...
;(defconst lao-transcription-pattern
;  (concat
;   "\\("
;   (regexp-opt (mapcar 'car lao-transcription-consonant-alist))
;   "\\)\\("
;   (regexp-opt (mapcar 'car lao-transcription-semi-vowel-alist))
;   "\\)?\\(\\("
;   (regexp-opt (mapcar 'car lao-transcription-vowel-alist))
;   "\\)\\("
;   (regexp-opt (mapcar 'car lao-transcription-maa-sakod-alist))
;   "\\)?\\("
;   (regexp-opt (mapcar 'car lao-transcription-tone-alist))
;   "\\)?\\)?\\|"
;   (regexp-opt (mapcar 'car lao-transcription-punctuation-alist))
;   )
;  "Regexp of Roman transcription pattern for one Lao syllable.")

(defconst lao-vowel-reordering-rule
  '(("(1P(B" (0 ?(1P(B) (0 ?(1Q(B))
    ("(1R(B" (0 ?(1R(B))
    ("(1T(B" (0 ?(1U(B))
    ("(1U(B" (0 ?(1U(B))
    ("(1V(B" (0 ?(1V(B))
    ("(1W(B" (0 ?(1W(B))
    ("(1X(B" (0 ?(1X(B))
    ("(1Y(B" (0 ?(1Y(B))
    ("(1`P(B" (?(1`(B 0 ?(1P(B) (?(1`(B 0 ?(1Q(B))
    ("(1`(B" (?(1`(B 0))
    ("(1aP(B" (?(1a(B 0 ?(1P(B) (?(1a(B 0 ?(1Q(B))
    ("(1a(B" (?(1a(B 0))
    ("(1bP(B" (?(1b(B 0 ?(1P(B) (0 ?(1[(B) (?(1-(B ?(1b(B 0 ?(1Q(B) (?(1G(B ?(1b(B 0 ?(1Q(B))
    ("(1b(B" (?(1b(B 0))
    ("(1`RP(B" (?(1`(B 0 ?(1R(B ?(1P(B) (0 ?(1Q(B ?(1M(B))
    ("(1m(B" (0 ?(1m(B) (0 ?(1M(B))
    ("(1`T(B" (?(1`(B 0 ?(1T(B))
    ("(1`U(B" (?(1`(B 0 ?(1U(B))
    ("(1[GP(B" (0 ?(1[(B ?(1G(B ?(1P(B) (0 ?(1Q(B ?(1G(B))
    ("(1[G(B" (0 ?(1[(B ?(1G(B) (0 ?(1G(B))
    ("(1`Q]P(B" (?(1`(B 0 ?(1Q(B ?(1](B ?(1P(B) (0 ?(1Q(B ?(1](B))
    ("(1`Q](B" (?(1`(B 0 ?(1Q(B ?(1](B) (0 ?(1](B))
    ("(1`VM(B" (?(1`(B 0 ?(1V(B ?(1M(B))
    ("(1`WM(B" (?(1`(B 0 ?(1W(B ?(1M(B))
    ("(1d(B" (?(1d(B 0))
    ("(1c(B" (?(1c(B 0))
    ("(1`[R(B" (?(1`(B 0 ?(1[(B ?(1R(B))
    ("(1S(B" (0 ?(1S(B)))
  "Alist of Lao vowel string vs the corresponding re-ordering rule.
Each element has this form:
	(VOWEL NO-MAA-SAKOD-RULE WITH-MAA-SAKOD-RULE (MAA-SAKOD-0 RULE-0) ...)

VOWEL is a vowel string (e.g. \"(1`Q]P(B\").

NO-MAA-SAKOD-RULE is a rule to re-order and modify VOWEL following a
consonant.  It is a list vowel characters or 0.  The element 0
indicate the place to embed a consonant.

Optional WITH-MAA-SAKOD-RULE is a rule to re-order and modify VOWEL
follwoing a consonant and preceding a maa-sakod character.  If it is
nil, NO-MAA-SAKOD-RULE is used.  The maa-sakod character is alwasy
appended at the tail.

For instance, rule `(\"(1`WM(B\" (?(1`(B t ?(1W(B ?(1M(B))' tells that this vowel
string following a consonant `(1!(B' should be re-ordered as \"(1`!WM(B\".

Optional (MAA-SAKOD-n RULE-n) are rules specially applied to maa-sakod
character MAA-SAKOD-n.")

;;;###autoload
(defun lao-transcribe-single-roman-syllable-to-lao (from to &optional str)
  "Transcribe a Romanized Lao syllable in the region FROM and TO to Lao string.
Only the first syllable is transcribed.
The value has the form: (START END LAO-STRING), where
START and END are the beggining and end positions of the Roman Lao syllable,
LAO-STRING is the Lao character transcription of it.

Optional 3rd arg STR, if non-nil, is a string to search for Roman Lao
syllable.  In that case, FROM and TO are indexes to STR."
  (if str
      (if (setq from (string-match lao-transcription-pattern str from))
	  (progn
	    (if (>= from to)
		(setq from nil)
	      (setq to (match-end 0)))))
    (save-excursion
      (goto-char from)
      (if (setq to (re-search-forward lao-transcription-pattern to t))
	  (setq from (match-beginning 0))
	(setq from nil))))
  (if from
      (let* ((consonant (match-string 1 str))
	     (semivowel (match-string 3 str))
	     (vowel (match-string 5 str))
	     (maa-sakod (match-string 8 str))
	     (tone (match-string 9 str))
	     lao-consonant lao-semivowel lao-vowel lao-maa-sakod lao-tone
	     clen cidx)
	(setq to (match-end 0))
	(if (not consonant)
	    (setq str (cdr (assoc (match-string 0 str)
				  lao-transcription-punctuation-alist)))
	  (setq lao-consonant
		(cdr (assoc consonant lao-transcription-consonant-alist)))
	  (if (vectorp lao-consonant)
	      (setq lao-consonant (aref lao-consonant 0)))
	  (setq clen (length lao-consonant))
	  (if semivowel
	      ;; Include semivowel in STR.
	      (setq lao-semivowel
		    (cdr (assoc semivowel lao-transcription-semi-vowel-alist))
		    str (if (= clen 1)
			    (concat lao-consonant lao-semivowel)
			  (concat (substring lao-consonant 0 1) lao-semivowel
				  (substring lao-consonant 1))))
	    (setq str lao-consonant))
	  (if vowel
	      (let (rule)
		(setq lao-vowel
		      (cdr (assoc vowel lao-transcription-vowel-alist)))
		(if (vectorp lao-vowel)
		    (setq lao-vowel (aref lao-vowel 0)))
		(setq rule (assoc lao-vowel lao-vowel-reordering-rule))
		(if (null maa-sakod)
		    (setq rule (nth 1 rule))
		  (setq lao-maa-sakod
			(cdr (assoc maa-sakod lao-transcription-maa-sakod-alist))
			rule
			(or (cdr (assq (aref lao-maa-sakod 0) (nthcdr 2 rule)))
			    (nth 2 rule)
			    (nth 1 rule))))
		(or rule
		    (error "Lao vowel %S has no re-ordering rule" lao-vowel))
		(setq lao-consonant str str "")
		(while rule
		  (if (= (car rule) 0)
		      (setq str (concat str lao-consonant)
			    cidx (length str))
		    (setq str (concat str (list (car rule)))))
		  (setq rule (cdr rule)))
		(or cidx
		    (error "Lao vowel %S has malformed re-ordering rule" vowel))
		;; Set CIDX to after upper or lower vowel if any.
		(let ((len (length str)))
		  (while (and (< cidx len)
			      (memq (get-char-code-property (aref str cidx)
							    'phonetic-type)
				    '(vowel-lower vowel-upper)))
		    (setq cidx (1+ cidx))))
		(if lao-maa-sakod
		    (setq str (concat str lao-maa-sakod)))
		(if tone
		    (setq lao-tone
			  (cdr (assoc tone lao-transcription-tone-alist))
			  str (concat (substring str 0 cidx) lao-tone
				      (substring str cidx)))))))
	(list from to (lao-compose-string str)))))

;;;###autoload
(defun lao-transcribe-roman-to-lao-string (str)
  "Transcribe Romanized Lao string STR to Lao character string."
  (let ((from 0)
	(to (length str))
	(lao-str "")
	val)
    (while (setq val (lao-transcribe-single-roman-syllable-to-lao from to str))
      (let ((start (car val))
	    (end (nth 1 val))
	    (lao (nth 2 val)))
	(if (> start from)
	    (setq lao-str (concat lao-str (substring str from start) lao))
	  (setq lao-str (concat lao-str lao)))
	(setq from end)))
    (if (< from to)
	(concat lao-str (substring str from to))
      lao-str)))

;;;###autoload
(defun lao-composition-function (from to pattern &optional string)
  "Compose Lao text in the region FROM and TO.
The text matches the regular expression PATTERN.
Optional 4th argument STRING, if non-nil, is a string containing text
to compose.

The return value is number of composed characters."
  (if (< (1+ from) to)
      (prog1 (- to from)
	(if string
	    (compose-string string from to)
	  (compose-region from to))
	(- to from))))

;;;###autoload
(defun lao-compose-region (from to)
  (interactive "r")
  (save-restriction
    (narrow-to-region from to)
    (goto-char (point-min))
    (with-category-table lao-category-table
      (while (re-search-forward lao-composition-pattern nil t)
	(compose-region (match-beginning 0) (point))))))

;;
(provide 'lao-util)

;;; lao-util.el ends here