lisp/international/ccl.el

   1 ;;; ccl.el --- CCL (Code Conversion Language) compiler
   2
   3 ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
   4 ;; Licensed to the Free Software Foundation.
   5
   6 ;; Keywords: CCL, mule, multilingual, character set, coding-system
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; CCL (Code Conversion Language) is a simple programming language to
  28 ;; be used for various kind of code conversion.  CCL program is
  29 ;; compiled to CCL code (vector of integers) and executed by CCL
  30 ;; interpreter of Emacs.
  31 ;;
  32 ;; CCL is used for code conversion at process I/O and file I/O for
  33 ;; non-standard coding-system.  In addition, it is used for
  34 ;; calculating a code point of X's font from a character code.
  35 ;; However, since CCL is designed as a powerful programming language,
  36 ;; it can be used for more generic calculation.  For instance,
  37 ;; combination of three or more arithmetic operations can be
  38 ;; calculated faster than Emacs Lisp.
  39 ;;
  40 ;; Here's the syntax of CCL program in BNF notation.
  41 ;;
  42 ;; CCL_PROGRAM :=
  43 ;;      (BUFFER_MAGNIFICATION
  44 ;;       CCL_MAIN_BLOCK
  45 ;;       [ CCL_EOF_BLOCK ])
  46 ;;
  47 ;; BUFFER_MAGNIFICATION := integer
  48 ;; CCL_MAIN_BLOCK := CCL_BLOCK
  49 ;; CCL_EOF_BLOCK := CCL_BLOCK
  50 ;;
  51 ;; CCL_BLOCK :=
  52 ;;      STATEMENT | (STATEMENT [STATEMENT ...])
  53 ;; STATEMENT :=
  54 ;;      SET | IF | BRANCH | LOOP | REPEAT | BREAK | READ | WRITE | CALL
  55 ;;
  56 ;; SET :=
  57 ;;      (REG = EXPRESSION)
  58 ;;      | (REG ASSIGNMENT_OPERATOR EXPRESSION)
  59 ;;      | integer
  60 ;;
  61 ;; EXPRESSION := ARG | (EXPRESSION OPERATOR ARG)
  62 ;;
  63 ;; IF := (if EXPRESSION CCL_BLOCK CCL_BLOCK)
  64 ;; BRANCH := (branch EXPRESSION CCL_BLOCK [CCL_BLOCK ...])
  65 ;; LOOP := (loop STATEMENT [STATEMENT ...])
  66 ;; BREAK := (break)
  67 ;; REPEAT :=
  68 ;;      (repeat)
  69 ;;      | (write-repeat [REG | integer | string])
  70 ;;      | (write-read-repeat REG [integer | ARRAY])
  71 ;; READ :=
  72 ;;      (read REG ...)
  73 ;;      | (read-if (REG OPERATOR ARG) CCL_BLOCK CCL_BLOCK)
  74 ;;      | (read-branch REG CCL_BLOCK [CCL_BLOCK ...])
  75 ;;      | (read-multibyte-character REG {charset} REG {code-point})
  76 ;; WRITE :=
  77 ;;      (write REG ...)
  78 ;;      | (write EXPRESSION)
  79 ;;      | (write integer) | (write string) | (write REG ARRAY)
  80 ;;      | string
  81 ;;      | (write-multibyte-character REG(charset) REG(codepoint))
  82 ;; TRANSLATE :=
  83 ;;      (translate-character REG(table) REG(charset) REG(codepoint))
  84 ;;      | (translate-character SYMBOL REG(charset) REG(codepoint))
  85 ;; MAP :=
  86 ;;      (iterate-multiple-map REG REG MAP-IDs)
  87 ;;      | (map-multiple REG REG (MAP-SET))
  88 ;;      | (map-single REG REG MAP-ID)
  89 ;; MAP-IDs := MAP-ID ...
  90 ;; MAP-SET := MAP-IDs | (MAP-IDs) MAP-SET
  91 ;; MAP-ID := integer
  92 ;;
  93 ;; CALL := (call ccl-program-name)
  94 ;; END := (end)
  95 ;;
  96 ;; REG := r0 | r1 | r2 | r3 | r4 | r5 | r6 | r7
  97 ;; ARG := REG | integer
  98 ;; OPERATOR :=
  99 ;;      + | - | * | / | % | & | '|' | ^ | << | >> | <8 | >8 | //
 100 ;;      | < | > | == | <= | >= | != | de-sjis | en-sjis
 101 ;; ASSIGNMENT_OPERATOR :=
 102 ;;      += | -= | *= | /= | %= | &= | '|=' | ^= | <<= | >>=
 103 ;; ARRAY := '[' integer ... ']'
 104
 105 ;;; Code:
 106
 107 (defgroup ccl nil
 108   "CCL (Code Conversion Language) compiler."
 109   :prefix "ccl-"
 110   :group 'i18n)
 111
 112 (defconst ccl-command-table
 113   [if branch loop break repeat write-repeat write-read-repeat
 114       read read-if read-branch write call end
 115       read-multibyte-character write-multibyte-character
 116       translate-character
 117       iterate-multiple-map map-multiple map-single]
 118   "Vector of CCL commands (symbols).")
 119
 120 ;; Put a property to each symbol of CCL commands for the compiler.
 121 (let (op (i 0) (len (length ccl-command-table)))
 122   (while (< i len)
 123     (setq op (aref ccl-command-table i))
 124     (put op 'ccl-compile-function (intern (format "ccl-compile-%s" op)))
 125     (setq i (1+ i))))
 126
 127 (defconst ccl-code-table
 128   [set-register
 129    set-short-const
 130    set-const
 131    set-array
 132    jump
 133    jump-cond
 134    write-register-jump
 135    write-register-read-jump
 136    write-const-jump
 137    write-const-read-jump
 138    write-string-jump
 139    write-array-read-jump
 140    read-jump
 141    branch
 142    read-register
 143    write-expr-const
 144    read-branch
 145    write-register
 146    write-expr-register
 147    call
 148    write-const-string
 149    write-array
 150    end
 151    set-assign-expr-const
 152    set-assign-expr-register
 153    set-expr-const
 154    set-expr-register
 155    jump-cond-expr-const
 156    jump-cond-expr-register
 157    read-jump-cond-expr-const
 158    read-jump-cond-expr-register
 159    ex-cmd
 160    ]
 161   "Vector of CCL compiled codes (symbols).")
 162
 163 (defconst ccl-extended-code-table
 164   [read-multibyte-character
 165    write-multibyte-character
 166    translate-character
 167    translate-character-const-tbl
 168    nil nil nil nil nil nil nil nil nil nil nil nil ; 0x04-0x0f
 169    iterate-multiple-map
 170    map-multiple
 171    map-single
 172    ]
 173   "Vector of CCL extended compiled codes (symbols).")
 174
 175 ;; Put a property to each symbol of CCL codes for the disassembler.
 176 (let (code (i 0) (len (length ccl-code-table)))
 177   (while (< i len)
 178     (setq code (aref ccl-code-table i))
 179     (put code 'ccl-code i)
 180     (put code 'ccl-dump-function (intern (format "ccl-dump-%s" code)))
 181     (setq i (1+ i))))
 182
 183 (let (code (i 0) (len (length ccl-extended-code-table)))
 184   (while (< i len)
 185     (setq code (aref ccl-extended-code-table i))
 186     (if code
 187         (progn
 188           (put code 'ccl-ex-code i)
 189           (put code 'ccl-dump-function (intern (format "ccl-dump-%s" code)))))
 190     (setq i (1+ i))))
 191
 192 (defconst ccl-jump-code-list
 193   '(jump jump-cond write-register-jump write-register-read-jump
 194     write-const-jump write-const-read-jump write-string-jump
 195     write-array-read-jump read-jump))
 196
 197 ;; Put a property `jump-flag' to each CCL code which execute jump in
 198 ;; some way.
 199 (let ((l ccl-jump-code-list))
 200   (while l
 201     (put (car l) 'jump-flag t)
 202     (setq l (cdr l))))
 203
 204 (defconst ccl-register-table
 205   [r0 r1 r2 r3 r4 r5 r6 r7]
 206   "Vector of CCL registers (symbols).")
 207
 208 ;; Put a property to indicate register number to each symbol of CCL.
 209 ;; registers.
 210 (let (reg (i 0) (len (length ccl-register-table)))
 211   (while (< i len)
 212     (setq reg (aref ccl-register-table i))
 213     (put reg 'ccl-register-number i)
 214     (setq i (1+ i))))
 215
 216 (defconst ccl-arith-table
 217   [+ - * / % & | ^ << >> <8 >8 // nil nil nil
 218    < > == <= >= != de-sjis en-sjis]
 219   "Vector of CCL arithmetic/logical operators (symbols).")
 220
 221 ;; Put a property to each symbol of CCL operators for the compiler.
 222 (let (arith (i 0) (len (length ccl-arith-table)))
 223   (while (< i len)
 224     (setq arith (aref ccl-arith-table i))
 225     (if arith (put arith 'ccl-arith-code i))
 226     (setq i (1+ i))))
 227
 228 (defconst ccl-assign-arith-table
 229   [+= -= *= /= %= &= |= ^= <<= >>= <8= >8= //=]
 230   "Vector of CCL assignment operators (symbols).")
 231
 232 ;; Put a property to each symbol of CCL assignment operators for the compiler.
 233 (let (arith (i 0) (len (length ccl-assign-arith-table)))
 234   (while (< i len)
 235     (setq arith (aref ccl-assign-arith-table i))
 236     (put arith 'ccl-self-arith-code i)
 237     (setq i (1+ i))))
 238
 239 (defvar ccl-program-vector nil
 240   "Working vector of CCL codes produced by CCL compiler.")
 241 (defvar ccl-current-ic 0
 242   "The current index for `ccl-program-vector'.")
 243
 244 ;; Embed integer DATA in `ccl-program-vector' at `ccl-current-ic' and
 245 ;; increment it.  If IC is specified, embed DATA at IC.
 246 (defun ccl-embed-data (data &optional ic)
 247   (if ic
 248       (aset ccl-program-vector ic data)
 249     (aset ccl-program-vector ccl-current-ic data)
 250     (setq ccl-current-ic (1+ ccl-current-ic))))
 251
 252 ;; Embed string STR of length LEN in `ccl-program-vector' at
 253 ;; `ccl-current-ic'.
 254 (defun ccl-embed-string (len str)
 255   (let ((i 0))
 256     (while (< i len)
 257       (ccl-embed-data (logior (ash (aref str i) 16)
 258                                (if (< (1+ i) len)
 259                                    (ash (aref str (1+ i)) 8)
 260                                  0)
 261                                (if (< (+ i 2) len)
 262                                    (aref str (+ i 2))
 263                                  0)))
 264       (setq i (+ i 3)))))
 265
 266 ;; Embed a relative jump address to `ccl-current-ic' in
 267 ;; `ccl-program-vector' at IC without altering the other bit field.
 268 (defun ccl-embed-current-address (ic)
 269   (let ((relative (- ccl-current-ic (1+ ic))))
 270     (aset ccl-program-vector ic
 271           (logior (aref ccl-program-vector ic) (ash relative 8)))))
 272
 273 ;; Embed CCL code for the operation OP and arguments REG and DATA in
 274 ;; `ccl-program-vector' at `ccl-current-ic' in the following format.
 275 ;;      |----------------- integer (28-bit) ------------------|
 276 ;;      |------------ 20-bit ------------|- 3-bit --|- 5-bit -|
 277 ;;      |------------- DATA -------------|-- REG ---|-- OP ---|
 278 ;; If REG2 is specified, embed a code in the following format.
 279 ;;      |------- 17-bit ------|- 3-bit --|- 3-bit --|- 5-bit -|
 280 ;;      |-------- DATA -------|-- REG2 --|-- REG ---|-- OP ---|
 281
 282 ;; If REG is a CCL register symbol (e.g. r0, r1...), the register
 283 ;; number is embedded.  If OP is one of unconditional jumps, DATA is
 284 ;; changed to an relative jump address.
 285
 286 (defun ccl-embed-code (op reg data &optional reg2)
 287   (if (and (> data 0) (get op 'jump-flag))
 288       ;; DATA is an absolute jump address.  Make it relative to the
 289       ;; next of jump code.
 290       (setq data (- data (1+ ccl-current-ic))))
 291   (let ((code (logior (get op 'ccl-code)
 292                       (ash
 293                        (if (symbolp reg) (get reg 'ccl-register-number) reg) 5)
 294                       (if reg2
 295                           (logior (ash (get reg2 'ccl-register-number) 8)
 296                                   (ash data 11))
 297                         (ash data 8)))))
 298     (aset ccl-program-vector ccl-current-ic code)
 299     (setq ccl-current-ic (1+ ccl-current-ic))))
 300
 301 ;; extended ccl command format
 302 ;;      |- 14-bit -|- 3-bit --|- 3-bit --|- 3-bit --|- 5-bit -|
 303 ;;      |- EX-OP --|-- REG3 --|-- REG2 --|-- REG ---|-- OP ---|
 304 (defun ccl-embed-extended-command (ex-op reg reg2 reg3)
 305   (let ((data (logior (ash (get ex-op 'ccl-ex-code) 3)
 306                       (if (symbolp reg3)
 307                           (get reg3 'ccl-register-number)
 308                         0))))
 309     (ccl-embed-code 'ex-cmd reg data reg2)))
 310
 311 ;; Just advance `ccl-current-ic' by INC.
 312 (defun ccl-increment-ic (inc)
 313   (setq ccl-current-ic (+ ccl-current-ic inc)))
 314
 315 ;;;###autoload
 316 (defun ccl-program-p (obj)
 317   "T if OBJECT is a valid CCL compiled code."
 318   (and (vectorp obj)
 319        (let ((i 0) (len (length obj)) (flag t))
 320          (if (> len 1)
 321              (progn
 322                (while (and flag (< i len))
 323                  (setq flag (integerp (aref obj i)))
 324                  (setq i (1+ i)))
 325                flag)))))
 326
 327 ;; If non-nil, index of the start of the current loop.
 328 (defvar ccl-loop-head nil)
 329 ;; If non-nil, list of absolute addresses of the breaking points of
 330 ;; the current loop.
 331 (defvar ccl-breaks nil)
 332
 333 ;;;###autoload
 334 (defun ccl-compile (ccl-program)
 335   "Return a compiled code of CCL-PROGRAM as a vector of integer."
 336   (if (or (null (consp ccl-program))
 337           (null (integerp (car ccl-program)))
 338           (null (listp (car (cdr ccl-program)))))
 339       (error "CCL: Invalid CCL program: %s" ccl-program))
 340   (if (null (vectorp ccl-program-vector))
 341       (setq ccl-program-vector (make-vector 8192 0)))
 342   (setq ccl-loop-head nil ccl-breaks nil)
 343   (setq ccl-current-ic 0)
 344
 345   ;; The first element is the buffer magnification.
 346   (ccl-embed-data (car ccl-program))
 347
 348   ;; The second element is the address of the start CCL code for
 349   ;; processing end of input buffer (we call it eof-processor).  We
 350   ;; set it later.
 351   (ccl-increment-ic 1)
 352
 353   ;; Compile the main body of the CCL program.
 354   (ccl-compile-1 (car (cdr ccl-program)))
 355
 356   ;; Embed the address of eof-processor.
 357   (ccl-embed-data ccl-current-ic 1)
 358
 359   ;; Then compile eof-processor.
 360   (if (nth 2 ccl-program)
 361       (ccl-compile-1 (nth 2 ccl-program)))
 362
 363   ;; At last, embed termination code.
 364   (ccl-embed-code 'end 0 0)
 365
 366   (let ((vec (make-vector ccl-current-ic 0))
 367         (i 0))
 368     (while (< i ccl-current-ic)
 369       (aset vec i (aref ccl-program-vector i))
 370       (setq i (1+ i)))
 371     vec))
 372
 373 ;; Signal syntax error.
 374 (defun ccl-syntax-error (cmd)
 375   (error "CCL: Syntax error: %s" cmd))
 376
 377 ;; Check if ARG is a valid CCL register.
 378 (defun ccl-check-register (arg cmd)
 379   (if (get arg 'ccl-register-number)
 380       arg
 381     (error "CCL: Invalid register %s in %s." arg cmd)))
 382
 383 ;; Check if ARG is a valid CCL command.
 384 (defun ccl-check-compile-function (arg cmd)
 385   (or (get arg 'ccl-compile-function)
 386       (error "CCL: Invalid command: %s" cmd)))
 387
 388 ;; In the following code, most ccl-compile-XXXX functions return t if
 389 ;; they end with unconditional jump, else return nil.
 390
 391 ;; Compile CCL-BLOCK (see the syntax above).
 392 (defun ccl-compile-1 (ccl-block)
 393   (let (unconditional-jump
 394         cmd)
 395     (if (or (integerp ccl-block)
 396             (stringp ccl-block)
 397             (and ccl-block (symbolp (car ccl-block))))
 398         ;; This block consists of single statement.
 399         (setq ccl-block (list ccl-block)))
 400
 401     ;; Now CCL-BLOCK is a list of statements.  Compile them one by
 402     ;; one.
 403     (while ccl-block
 404       (setq cmd (car ccl-block))
 405       (setq unconditional-jump
 406             (cond ((integerp cmd)
 407                    ;; SET statement for the register 0.
 408                    (ccl-compile-set (list 'r0 '= cmd)))
 409
 410                   ((stringp cmd)
 411                    ;; WRITE statement of string argument.
 412                    (ccl-compile-write-string cmd))
 413
 414                   ((listp cmd)
 415                    ;; The other statements.
 416                    (cond ((eq (nth 1 cmd) '=)
 417                           ;; SET statement of the form `(REG = EXPRESSION)'.
 418                           (ccl-compile-set cmd))
 419
 420                          ((and (symbolp (nth 1 cmd))
 421                                (get (nth 1 cmd) 'ccl-self-arith-code))
 422                           ;; SET statement with an assignment operation.
 423                           (ccl-compile-self-set cmd))
 424
 425                          (t
 426                           (funcall (ccl-check-compile-function (car cmd) cmd)
 427                                    cmd))))
 428
 429                   (t
 430                    (ccl-syntax-error cmd))))
 431       (setq ccl-block (cdr ccl-block)))
 432     unconditional-jump))
 433
 434 (defconst ccl-max-short-const (ash 1 19))
 435 (defconst ccl-min-short-const (ash -1 19))
 436
 437 ;; Compile SET statement.
 438 (defun ccl-compile-set (cmd)
 439   (let ((rrr (ccl-check-register (car cmd) cmd))
 440         (right (nth 2 cmd)))
 441     (cond ((listp right)
 442            ;; CMD has the form `(RRR = (XXX OP YYY))'.
 443            (ccl-compile-expression rrr right))
 444
 445           ((integerp right)
 446            ;; CMD has the form `(RRR = integer)'.
 447            (if (and (<= right ccl-max-short-const)
 448                     (>= right ccl-min-short-const))
 449                (ccl-embed-code 'set-short-const rrr right)
 450              (ccl-embed-code 'set-const rrr 0)
 451              (ccl-embed-data right)))
 452
 453           (t
 454            ;; CMD has the form `(RRR = rrr [ array ])'.
 455            (ccl-check-register right cmd)
 456            (let ((ary (nth 3 cmd)))
 457              (if (vectorp ary)
 458                  (let ((i 0) (len (length ary)))
 459                    (ccl-embed-code 'set-array rrr len right)
 460                    (while (< i len)
 461                      (ccl-embed-data (aref ary i))
 462                      (setq i (1+ i))))
 463                (ccl-embed-code 'set-register rrr 0 right))))))
 464   nil)
 465
 466 ;; Compile SET statement with ASSIGNMENT_OPERATOR.
 467 (defun ccl-compile-self-set (cmd)
 468   (let ((rrr (ccl-check-register (car cmd) cmd))
 469         (right (nth 2 cmd)))
 470     (if (listp right)
 471         ;; CMD has the form `(RRR ASSIGN_OP (XXX OP YYY))', compile
 472         ;; the right hand part as `(r7 = (XXX OP YYY))' (note: the
 473         ;; register 7 can be used for storing temporary value).
 474         (progn
 475           (ccl-compile-expression 'r7 right)
 476           (setq right 'r7)))
 477     ;; Now CMD has the form `(RRR ASSIGN_OP ARG)'.  Compile it as
 478     ;; `(RRR = (RRR OP ARG))'.
 479     (ccl-compile-expression
 480      rrr
 481      (list rrr (intern (substring (symbol-name (nth 1 cmd)) 0 -1)) right)))
 482   nil)
 483
 484 ;; Compile SET statement of the form `(RRR = EXPR)'.
 485 (defun ccl-compile-expression (rrr expr)
 486   (let ((left (car expr))
 487         (op (get (nth 1 expr) 'ccl-arith-code))
 488         (right (nth 2 expr)))
 489     (if (listp left)
 490         (progn
 491           ;; EXPR has the form `((EXPR2 OP2 ARG) OP RIGHT)'.  Compile
 492           ;; the first term as `(r7 = (EXPR2 OP2 ARG)).'
 493           (ccl-compile-expression 'r7 left)
 494           (setq left 'r7)))
 495
 496     ;; Now EXPR has the form (LEFT OP RIGHT).
 497     (if (eq rrr left)
 498         ;; Compile this SET statement as `(RRR OP= RIGHT)'.
 499         (if (integerp right)
 500             (progn
 501               (ccl-embed-code 'set-assign-expr-const rrr (ash op 3) 'r0)
 502               (ccl-embed-data right))
 503           (ccl-check-register right expr)
 504           (ccl-embed-code 'set-assign-expr-register rrr (ash op 3) right))
 505
 506       ;; Compile this SET statement as `(RRR = (LEFT OP RIGHT))'.
 507       (if (integerp right)
 508           (progn
 509             (ccl-embed-code 'set-expr-const rrr (ash op 3) left)
 510             (ccl-embed-data right))
 511         (ccl-check-register right expr)
 512         (ccl-embed-code 'set-expr-register
 513                         rrr
 514                         (logior (ash op 3) (get right 'ccl-register-number))
 515                         left)))))
 516
 517 ;; Compile WRITE statement with string argument.
 518 (defun ccl-compile-write-string (str)
 519   (let ((len (length str)))
 520     (ccl-embed-code 'write-const-string 1 len)
 521     (ccl-embed-string len str))
 522   nil)
 523
 524 ;; Compile IF statement of the form `(if CONDITION TRUE-PART FALSE-PART)'.
 525 ;; If READ-FLAG is non-nil, this statement has the form
 526 ;; `(read-if (REG OPERATOR ARG) TRUE-PART FALSE-PART)'.
 527 (defun ccl-compile-if (cmd &optional read-flag)
 528   (if (and (/= (length cmd) 3) (/= (length cmd) 4))
 529       (error "CCL: Invalid number of arguments: %s" cmd))
 530   (let ((condition (nth 1 cmd))
 531         (true-cmds (nth 2 cmd))
 532         (false-cmds (nth 3 cmd))
 533         jump-cond-address
 534         false-ic)
 535     (if (and (listp condition)
 536              (listp (car condition)))
 537         ;; If CONDITION is a nested expression, the inner expression
 538         ;; should be compiled at first as SET statement, i.e.:
 539         ;; `(if ((X OP2 Y) OP Z) ...)' is compiled into two statements:
 540         ;; `(r7 = (X OP2 Y)) (if (r7 OP Z) ...)'.
 541         (progn
 542           (ccl-compile-expression 'r7 (car condition))
 543           (setq condition (cons 'r7 (cdr condition)))
 544           (setq cmd (cons (car cmd)
 545                           (cons condition (cdr (cdr cmd)))))))
 546
 547     (setq jump-cond-address ccl-current-ic)
 548     ;; Compile CONDITION.
 549     (if (symbolp condition)
 550         ;; CONDITION is a register.
 551         (progn
 552           (ccl-check-register condition cmd)
 553           (ccl-embed-code 'jump-cond condition 0))
 554       ;; CONDITION is a simple expression of the form (RRR OP ARG).
 555       (let ((rrr (car condition))
 556             (op (get (nth 1 condition) 'ccl-arith-code))
 557             (arg (nth 2 condition)))
 558         (ccl-check-register rrr cmd)
 559         (if (integerp arg)
 560             (progn
 561               (ccl-embed-code (if read-flag 'read-jump-cond-expr-const
 562                                 'jump-cond-expr-const)
 563                               rrr 0)
 564               (ccl-embed-data op)
 565               (ccl-embed-data arg))
 566           (ccl-check-register arg cmd)
 567           (ccl-embed-code (if read-flag 'read-jump-cond-expr-register
 568                             'jump-cond-expr-register)
 569                           rrr 0)
 570           (ccl-embed-data op)
 571           (ccl-embed-data (get arg 'ccl-register-number)))))
 572
 573     ;; Compile TRUE-PART.
 574     (let ((unconditional-jump (ccl-compile-1 true-cmds)))
 575       (if (null false-cmds)
 576           ;; This is the place to jump to if condition is false.
 577           (ccl-embed-current-address jump-cond-address)
 578         (let (end-true-part-address)
 579           (if (not unconditional-jump)
 580               (progn
 581                 ;; If TRUE-PART does not end with unconditional jump, we
 582                 ;; have to jump to the end of FALSE-PART from here.
 583                 (setq end-true-part-address ccl-current-ic)
 584                 (ccl-embed-code 'jump 0 0)))
 585           ;; This is the place to jump to if CONDITION is false.
 586           (ccl-embed-current-address jump-cond-address)
 587           ;; Compile FALSE-PART.
 588           (setq unconditional-jump
 589                 (and (ccl-compile-1 false-cmds) unconditional-jump))
 590           (if end-true-part-address
 591               ;; This is the place to jump to after the end of TRUE-PART.
 592               (ccl-embed-current-address end-true-part-address))))
 593       unconditional-jump)))
 594
 595 ;; Compile BRANCH statement.
 596 (defun ccl-compile-branch (cmd)
 597   (if (< (length cmd) 3)
 598       (error "CCL: Invalid number of arguments: %s" cmd))
 599   (ccl-compile-branch-blocks 'branch
 600                              (ccl-compile-branch-expression (nth 1 cmd) cmd)
 601                              (cdr (cdr cmd))))
 602
 603 ;; Compile READ statement of the form `(read-branch EXPR BLOCK0 BLOCK1 ...)'.
 604 (defun ccl-compile-read-branch (cmd)
 605   (if (< (length cmd) 3)
 606       (error "CCL: Invalid number of arguments: %s" cmd))
 607   (ccl-compile-branch-blocks 'read-branch
 608                              (ccl-compile-branch-expression (nth 1 cmd) cmd)
 609                              (cdr (cdr cmd))))
 610
 611 ;; Compile EXPRESSION part of BRANCH statement and return register
 612 ;; which holds a value of the expression.
 613 (defun ccl-compile-branch-expression (expr cmd)
 614   (if (listp expr)
 615       ;; EXPR has the form `(EXPR2 OP ARG)'.  Compile it as SET
 616       ;; statement of the form `(r7 = (EXPR2 OP ARG))'.
 617       (progn
 618         (ccl-compile-expression 'r7 expr)
 619         'r7)
 620     (ccl-check-register expr cmd)))
 621
 622 ;; Compile BLOCKs of BRANCH statement.  CODE is 'branch or 'read-branch.
 623 ;; REG is a register which holds a value of EXPRESSION part.  BLOCKs
 624 ;; is a list of CCL-BLOCKs.
 625 (defun ccl-compile-branch-blocks (code rrr blocks)
 626   (let ((branches (length blocks))
 627         branch-idx
 628         jump-table-head-address
 629         empty-block-indexes
 630         block-tail-addresses
 631         block-unconditional-jump)
 632     (ccl-embed-code code rrr branches)
 633     (setq jump-table-head-address ccl-current-ic)
 634     ;; The size of jump table is the number of blocks plus 1 (for the
 635     ;; case RRR is out of range).
 636     (ccl-increment-ic (1+ branches))
 637     (setq empty-block-indexes (list branches))
 638     ;; Compile each block.
 639     (setq branch-idx 0)
 640     (while blocks
 641       (if (null (car blocks))
 642           ;; This block is empty.
 643           (setq empty-block-indexes (cons branch-idx empty-block-indexes)
 644                 block-unconditional-jump t)
 645         ;; This block is not empty.
 646         (ccl-embed-data (- ccl-current-ic jump-table-head-address)
 647                         (+ jump-table-head-address branch-idx))
 648         (setq block-unconditional-jump (ccl-compile-1 (car blocks)))
 649         (if (not block-unconditional-jump)
 650             (progn
 651               ;; Jump address of the end of branches are embedded later.
 652               ;; For the moment, just remember where to embed them.
 653               (setq block-tail-addresses
 654                     (cons ccl-current-ic block-tail-addresses))
 655               (ccl-embed-code 'jump 0 0))))
 656       (setq branch-idx (1+ branch-idx))
 657       (setq blocks (cdr blocks)))
 658     (if (not block-unconditional-jump)
 659         ;; We don't need jump code at the end of the last block.
 660         (setq block-tail-addresses (cdr block-tail-addresses)
 661               ccl-current-ic (1- ccl-current-ic)))
 662     ;; Embed jump address at the tailing jump commands of blocks.
 663     (while block-tail-addresses
 664       (ccl-embed-current-address (car block-tail-addresses))
 665       (setq block-tail-addresses (cdr block-tail-addresses)))
 666     ;; For empty blocks, make entries in the jump table point directly here.
 667     (while empty-block-indexes
 668       (ccl-embed-data (- ccl-current-ic jump-table-head-address)
 669                       (+ jump-table-head-address (car empty-block-indexes)))
 670       (setq empty-block-indexes (cdr empty-block-indexes))))
 671   ;; Branch command ends by unconditional jump if RRR is out of range.
 672   nil)
 673
 674 ;; Compile LOOP statement.
 675 (defun ccl-compile-loop (cmd)
 676   (if (< (length cmd) 2)
 677       (error "CCL: Invalid number of arguments: %s" cmd))
 678   (let* ((ccl-loop-head ccl-current-ic)
 679          (ccl-breaks nil)
 680          unconditional-jump)
 681     (setq cmd (cdr cmd))
 682     (if cmd
 683         (progn
 684           (setq unconditional-jump t)
 685           (while cmd
 686             (setq unconditional-jump
 687                   (and (ccl-compile-1 (car cmd)) unconditional-jump))
 688             (setq cmd (cdr cmd)))
 689           (if (not ccl-breaks)
 690               unconditional-jump
 691             ;; Embed jump address for break statements encountered in
 692             ;; this loop.
 693             (while ccl-breaks
 694               (ccl-embed-current-address (car ccl-breaks))
 695               (setq ccl-breaks (cdr ccl-breaks))))
 696           nil))))
 697
 698 ;; Compile BREAK statement.
 699 (defun ccl-compile-break (cmd)
 700   (if (/= (length cmd) 1)
 701       (error "CCL: Invalid number of arguments: %s" cmd))
 702   (if (null ccl-loop-head)
 703       (error "CCL: No outer loop: %s" cmd))
 704   (setq ccl-breaks (cons ccl-current-ic ccl-breaks))
 705   (ccl-embed-code 'jump 0 0)
 706   t)
 707
 708 ;; Compile REPEAT statement.
 709 (defun ccl-compile-repeat (cmd)
 710   (if (/= (length cmd) 1)
 711       (error "CCL: Invalid number of arguments: %s" cmd))
 712   (if (null ccl-loop-head)
 713       (error "CCL: No outer loop: %s" cmd))
 714   (ccl-embed-code 'jump 0 ccl-loop-head)
 715   t)
 716
 717 ;; Compile WRITE-REPEAT statement.
 718 (defun ccl-compile-write-repeat (cmd)
 719   (if (/= (length cmd) 2)
 720       (error "CCL: Invalid number of arguments: %s" cmd))
 721   (if (null ccl-loop-head)
 722       (error "CCL: No outer loop: %s" cmd))
 723   (let ((arg (nth 1 cmd)))
 724     (cond ((integerp arg)
 725            (ccl-embed-code 'write-const-jump 0 ccl-loop-head)
 726            (ccl-embed-data arg))
 727           ((stringp arg)
 728            (let ((len (length arg))
 729                  (i 0))
 730              (ccl-embed-code 'write-string-jump 0 ccl-loop-head)
 731              (ccl-embed-data len)
 732              (ccl-embed-string len arg)))
 733           (t
 734            (ccl-check-register arg cmd)
 735            (ccl-embed-code 'write-register-jump arg ccl-loop-head))))
 736   t)
 737
 738 ;; Compile WRITE-READ-REPEAT statement.
 739 (defun ccl-compile-write-read-repeat (cmd)
 740   (if (or (< (length cmd) 2) (> (length cmd) 3))
 741       (error "CCL: Invalid number of arguments: %s" cmd))
 742   (if (null ccl-loop-head)
 743       (error "CCL: No outer loop: %s" cmd))
 744   (let ((rrr (ccl-check-register (nth 1 cmd) cmd))
 745         (arg (nth 2 cmd)))
 746     (cond ((null arg)
 747            (ccl-embed-code 'write-register-read-jump rrr ccl-loop-head))
 748           ((integerp arg)
 749            (ccl-embed-code 'write-const-read-jump rrr arg ccl-loop-head))
 750           ((vectorp arg)
 751            (let ((len (length arg))
 752                  (i 0))
 753              (ccl-embed-code 'write-array-read-jump rrr ccl-loop-head)
 754              (ccl-embed-data len)
 755              (while (< i len)
 756                (ccl-embed-data (aref arg i))
 757                (setq i (1+ i)))))
 758           (t
 759            (error "CCL: Invalid argument %s: %s" arg cmd)))
 760     (ccl-embed-code 'read-jump rrr ccl-loop-head))
 761   t)
 762
 763 ;; Compile READ statement.
 764 (defun ccl-compile-read (cmd)
 765   (if (< (length cmd) 2)
 766       (error "CCL: Invalid number of arguments: %s" cmd))
 767   (let* ((args (cdr cmd))
 768          (i (1- (length args))))
 769     (while args
 770       (let ((rrr (ccl-check-register (car args) cmd)))
 771         (ccl-embed-code 'read-register rrr i)
 772         (setq args (cdr args) i (1- i)))))
 773   nil)
 774
 775 ;; Compile READ-IF statement.
 776 (defun ccl-compile-read-if (cmd)
 777   (ccl-compile-if cmd 'read))
 778
 779 ;; Compile WRITE statement.
 780 (defun ccl-compile-write (cmd)
 781   (if (< (length cmd) 2)
 782       (error "CCL: Invalid number of arguments: %s" cmd))
 783   (let ((rrr (nth 1 cmd)))
 784     (cond ((integerp rrr)
 785            (ccl-embed-code 'write-const-string 0 rrr))
 786           ((stringp rrr)
 787            (ccl-compile-write-string rrr))
 788           ((and (symbolp rrr) (vectorp (nth 2 cmd)))
 789            (ccl-check-register rrr cmd)
 790            ;; CMD has the form `(write REG ARRAY)'.
 791            (let* ((arg (nth 2 cmd))
 792                   (len (length arg))
 793                   (i 0))
 794              (ccl-embed-code 'write-array rrr len)
 795              (while (< i len)
 796                (if (not (integerp (aref arg i)))
 797                    (error "CCL: Invalid argument %s: %s" arg cmd))
 798                (ccl-embed-data (aref arg i))
 799                (setq i (1+ i)))))
 800
 801           ((symbolp rrr)
 802            ;; CMD has the form `(write REG ...)'.
 803            (let* ((args (cdr cmd))
 804                   (i (1- (length args))))
 805              (while args
 806                (setq rrr (ccl-check-register (car args) cmd))
 807                (ccl-embed-code 'write-register rrr i)
 808                (setq args (cdr args) i (1- i)))))
 809
 810           ((listp rrr)
 811            ;; CMD has the form `(write (LEFT OP RIGHT))'.
 812            (let ((left (car rrr))
 813                  (op (get (nth 1 rrr) 'ccl-arith-code))
 814                  (right (nth 2 rrr)))
 815              (if (listp left)
 816                  (progn
 817                    ;; RRR has the form `((EXPR OP2 ARG) OP RIGHT)'.
 818                    ;; Compile the first term as `(r7 = (EXPR OP2 ARG))'.
 819                    (ccl-compile-expression 'r7 left)
 820                    (setq left 'r7)))
 821              ;; Now RRR has the form `(ARG OP RIGHT)'.
 822              (if (integerp right)
 823                  (progn
 824                    (ccl-embed-code 'write-expr-const 0 (ash op 3) left)
 825                    (ccl-embed-data right))
 826                (ccl-check-register right rrr)
 827                (ccl-embed-code 'write-expr-register 0
 828                                (logior (ash op 3)
 829                                        (get right 'ccl-register-number))))))
 830
 831           (t
 832            (error "CCL: Invalid argument: %s" cmd))))
 833   nil)
 834
 835 ;; Compile CALL statement.
 836 (defun ccl-compile-call (cmd)
 837   (if (/= (length cmd) 2)
 838       (error "CCL: Invalid number of arguments: %s" cmd))
 839   (if (not (symbolp (nth 1 cmd)))
 840       (error "CCL: Subroutine should be a symbol: %s" cmd))
 841   (let* ((name (nth 1 cmd))
 842          (idx (get name 'ccl-program-idx)))
 843     (if (not idx)
 844         (error "CCL: Unknown subroutine name: %s" name))
 845     (ccl-embed-code 'call 0 idx))
 846   nil)
 847
 848 ;; Compile END statement.
 849 (defun ccl-compile-end (cmd)
 850   (if (/= (length cmd) 1)
 851       (error "CCL: Invalid number of arguments: %s" cmd))
 852   (ccl-embed-code 'end 0 0)
 853   t)
 854
 855 ;; Compile read-multibyte-character
 856 (defun ccl-compile-read-multibyte-character (cmd)
 857   (if (/= (length cmd) 3)
 858       (error "CCL: Invalid number of arguments: %s" cmd))
 859   (let ((RRR (nth 1 cmd))
 860         (rrr (nth 2 cmd)))
 861     (ccl-check-register rrr cmd)
 862     (ccl-check-register RRR cmd)
 863     (ccl-embed-extended-command 'read-multibyte-character rrr RRR 0)))
 864
 865 ;; Compile write-multibyte-character
 866 (defun ccl-compile-write-multibyte-character (cmd)
 867   (if (/= (length cmd) 3)
 868       (error "CCL: Invalid number of arguments: %s" cmd))
 869   (let ((RRR (nth 1 cmd))
 870         (rrr (nth 2 cmd)))
 871     (ccl-check-register rrr cmd)
 872     (ccl-check-register RRR cmd)
 873     (ccl-embed-extended-command 'write-multibyte-character rrr RRR 0)))
 874
 875 ;; Compile translate-character
 876 (defun ccl-compile-translate-character (cmd)
 877   (if (/= (length cmd) 4)
 878       (error "CCL: Invalid number of arguments: %s" cmd))
 879   (let ((Rrr (nth 1 cmd))
 880         (RRR (nth 2 cmd))
 881         (rrr (nth 3 cmd)))
 882     (ccl-check-register rrr cmd)
 883     (ccl-check-register RRR cmd)
 884     (cond ((symbolp Rrr)
 885            (if (not (get Rrr 'translation-table))
 886                (error "CCL: Invalid translation table %s in %s" Rrr cmd))
 887            (ccl-embed-extended-command 'translate-character-const-tbl
 888                                        rrr RRR 0)
 889            (ccl-embed-data Rrr))
 890           (t
 891            (ccl-check-register Rrr cmd)
 892            (ccl-embed-extended-command 'translate-character rrr RRR Rrr)))))
 893
 894 (defun ccl-compile-iterate-multiple-map (cmd)
 895   (ccl-compile-multiple-map-function 'iterate-multiple-map cmd))
 896
 897 (defun ccl-compile-map-multiple (cmd)
 898   (if (/= (length cmd) 4)
 899       (error "CCL: Invalid number of arguments: %s" cmd))
 900   (let ((func '(lambda (arg mp)
 901                           (let ((len 0) result add)
 902                             (while arg
 903                               (if (consp (car arg))
 904                                   (setq add (funcall func (car arg) t)
 905                                         result (append result add)
 906                                         add (+ (-(car add)) 1))
 907                                 (setq result
 908                                       (append result
 909                                               (list (car arg)))
 910                                       add 1))
 911                               (setq arg (cdr arg)
 912                                     len (+ len add)))
 913                             (if mp
 914                                 (cons (- len) result)
 915                               result))))
 916         arg)
 917     (setq arg (append (list (nth 0 cmd) (nth 1 cmd) (nth 2 cmd))
 918                       (funcall func (nth 3 cmd) nil)))
 919     (ccl-compile-multiple-map-function 'map-multiple arg)))
 920
 921 (defun ccl-compile-map-single (cmd)
 922   (if (/= (length cmd) 4)
 923       (error "CCL: Invalid number of arguments: %s" cmd))
 924   (let ((RRR (nth 1 cmd))
 925         (rrr (nth 2 cmd))
 926         (map (nth 3 cmd))
 927         id)
 928     (ccl-check-register rrr cmd)
 929     (ccl-check-register RRR cmd)
 930     (ccl-embed-extended-command 'map-single rrr RRR 0)
 931     (cond ((symbolp map)
 932            (if (get map 'code-conversion-map)
 933                (ccl-embed-data map)
 934              (error "CCL: Invalid map: %s" map)))
 935           (t
 936            (error "CCL: Invalid type of arguments: %s" cmd)))))
 937
 938 (defun ccl-compile-multiple-map-function (command cmd)
 939   (if (< (length cmd) 4)
 940       (error "CCL: Invalid number of arguments: %s" cmd))
 941   (let ((RRR (nth 1 cmd))
 942         (rrr (nth 2 cmd))
 943         (args (nthcdr 3 cmd))
 944         map)
 945     (ccl-check-register rrr cmd)
 946     (ccl-check-register RRR cmd)
 947     (ccl-embed-extended-command command rrr RRR 0)
 948     (ccl-embed-data (length args))
 949     (while args
 950       (setq map (car args))
 951       (cond ((symbolp map)
 952              (if (get map 'code-conversion-map)
 953                  (ccl-embed-data map)
 954                (error "CCL: Invalid map: %s" map)))
 955             ((numberp map)
 956              (ccl-embed-data map))
 957             (t
 958              (error "CCL: Invalid type of arguments: %s" cmd)))
 959       (setq args (cdr args)))))
 960
 961 \f
 962 ;;; CCL dump staffs
 963
 964 ;; To avoid byte-compiler warning.
 965 (defvar ccl-code)
 966
 967 ;;;###autoload
 968 (defun ccl-dump (ccl-code)
 969   "Disassemble compiled CCL-CODE."
 970   (let ((len (length ccl-code))
 971         (buffer-mag (aref ccl-code 0)))
 972     (cond ((= buffer-mag 0)
 973            (insert "Don't output anything.\n"))
 974           ((= buffer-mag 1)
 975            (insert "Out-buffer must be as large as in-buffer.\n"))
 976           (t
 977            (insert
 978             (format "Out-buffer must be %d times bigger than in-buffer.\n"
 979                     buffer-mag))))
 980     (insert "Main-body:\n")
 981     (setq ccl-current-ic 2)
 982     (if (> (aref ccl-code 1) 0)
 983         (progn
 984           (while (< ccl-current-ic (aref ccl-code 1))
 985             (ccl-dump-1))
 986           (insert "At EOF:\n")))
 987     (while (< ccl-current-ic len)
 988       (ccl-dump-1))
 989     ))
 990
 991 ;; Return a CCL code in `ccl-code' at `ccl-current-ic'.
 992 (defun ccl-get-next-code ()
 993   (prog1
 994       (aref ccl-code ccl-current-ic)
 995     (setq ccl-current-ic (1+ ccl-current-ic))))
 996
 997 (defun ccl-dump-1 ()
 998   (let* ((code (ccl-get-next-code))
 999          (cmd (aref ccl-code-table (logand code 31)))
1000          (rrr (ash (logand code 255) -5))
1001          (cc (ash code -8)))
1002     (insert (format "%5d:[%s] " (1- ccl-current-ic) cmd))
1003     (funcall (get cmd 'ccl-dump-function) rrr cc)))
1004
1005 (defun ccl-dump-set-register (rrr cc)
1006   (insert (format "r%d = r%d\n" rrr cc)))
1007
1008 (defun ccl-dump-set-short-const (rrr cc)
1009   (insert (format "r%d = %d\n" rrr cc)))
1010
1011 (defun ccl-dump-set-const (rrr ignore)
1012   (insert (format "r%d = %d\n" rrr (ccl-get-next-code))))
1013
1014 (defun ccl-dump-set-array (rrr cc)
1015   (let ((rrr2 (logand cc 7))
1016         (len (ash cc -3))
1017         (i 0))
1018     (insert (format "r%d = array[r%d] of length %d\n\t"
1019                     rrr rrr2 len))
1020     (while (< i len)
1021       (insert (format "%d " (ccl-get-next-code)))
1022       (setq i (1+ i)))
1023     (insert "\n")))
1024
1025 (defun ccl-dump-jump (ignore cc &optional address)
1026   (insert (format "jump to %d(" (+ (or address ccl-current-ic) cc)))
1027   (if (>= cc 0)
1028       (insert "+"))
1029   (insert (format "%d)\n" (1+ cc))))
1030
1031 (defun ccl-dump-jump-cond (rrr cc)
1032   (insert (format "if (r%d == 0), " rrr))
1033   (ccl-dump-jump nil cc))
1034
1035 (defun ccl-dump-write-register-jump (rrr cc)
1036   (insert (format "write r%d, " rrr))
1037   (ccl-dump-jump nil cc))
1038
1039 (defun ccl-dump-write-register-read-jump (rrr cc)
1040   (insert (format "write r%d, read r%d, " rrr rrr))
1041   (ccl-dump-jump nil cc)
1042   (ccl-get-next-code)                   ; Skip dummy READ-JUMP
1043   )
1044
1045 (defun ccl-extract-arith-op (cc)
1046   (aref ccl-arith-table (ash cc -6)))
1047
1048 (defun ccl-dump-write-expr-const (ignore cc)
1049   (insert (format "write (r%d %s %d)\n"
1050                   (logand cc 7)
1051                   (ccl-extract-arith-op cc)
1052                   (ccl-get-next-code))))
1053
1054 (defun ccl-dump-write-expr-register (ignore cc)
1055   (insert (format "write (r%d %s r%d)\n"
1056                   (logand cc 7)
1057                   (ccl-extract-arith-op cc)
1058                   (logand (ash cc -3) 7))))
1059
1060 (defun ccl-dump-insert-char (cc)
1061   (cond ((= cc ?\t) (insert " \"^I\""))
1062         ((= cc ?\n) (insert " \"^J\""))
1063         (t (insert (format " \"%c\"" cc)))))
1064
1065 (defun ccl-dump-write-const-jump (ignore cc)
1066   (let ((address ccl-current-ic))
1067     (insert "write char")
1068     (ccl-dump-insert-char (ccl-get-next-code))
1069     (insert ", ")
1070     (ccl-dump-jump nil cc address)))
1071
1072 (defun ccl-dump-write-const-read-jump (rrr cc)
1073   (let ((address ccl-current-ic))
1074     (insert "write char")
1075     (ccl-dump-insert-char (ccl-get-next-code))
1076     (insert (format ", read r%d, " rrr))
1077     (ccl-dump-jump cc address)
1078     (ccl-get-next-code)                 ; Skip dummy READ-JUMP
1079     ))
1080
1081 (defun ccl-dump-write-string-jump (ignore cc)
1082   (let ((address ccl-current-ic)
1083         (len (ccl-get-next-code))
1084         (i 0))
1085     (insert "write \"")
1086     (while (< i len)
1087       (let ((code (ccl-get-next-code)))
1088         (insert (ash code -16))
1089         (if (< (1+ i) len) (insert (logand (ash code -8) 255)))
1090         (if (< (+ i 2) len) (insert (logand code 255))))
1091       (setq i (+ i 3)))
1092     (insert "\", ")
1093     (ccl-dump-jump nil cc address)))
1094
1095 (defun ccl-dump-write-array-read-jump (rrr cc)
1096   (let ((address ccl-current-ic)
1097         (len (ccl-get-next-code))
1098         (i 0))
1099     (insert (format "write array[r%d] of length %d,\n\t" rrr len))
1100     (while (< i len)
1101       (ccl-dump-insert-char (ccl-get-next-code))
1102       (setq i (1+ i)))
1103     (insert (format "\n\tthen read r%d, " rrr))
1104     (ccl-dump-jump nil cc address)
1105     (ccl-get-next-code)                 ; Skip dummy READ-JUMP.
1106     ))
1107
1108 (defun ccl-dump-read-jump (rrr cc)
1109   (insert (format "read r%d, " rrr))
1110   (ccl-dump-jump nil cc))
1111
1112 (defun ccl-dump-branch (rrr len)
1113   (let ((jump-table-head ccl-current-ic)
1114         (i 0))
1115     (insert (format "jump to array[r%d] of length %d\n\t" rrr len))
1116     (while (<= i len)
1117       (insert (format "%d " (+ jump-table-head (ccl-get-next-code))))
1118       (setq i (1+ i)))
1119     (insert "\n")))
1120
1121 (defun ccl-dump-read-register (rrr cc)
1122   (insert (format "read r%d (%d remaining)\n" rrr cc)))
1123
1124 (defun ccl-dump-read-branch (rrr len)
1125   (insert (format "read r%d, " rrr))
1126   (ccl-dump-branch rrr len))
1127
1128 (defun ccl-dump-write-register (rrr cc)
1129   (insert (format "write r%d (%d remaining)\n" rrr cc)))
1130
1131 (defun ccl-dump-call (ignore cc)
1132   (insert (format "call subroutine #%d\n" cc)))
1133
1134 (defun ccl-dump-write-const-string (rrr cc)
1135   (if (= rrr 0)
1136       (progn
1137         (insert "write char")
1138         (ccl-dump-insert-char cc)
1139         (newline))
1140     (let ((len cc)
1141           (i 0))
1142       (insert "write \"")
1143       (while (< i len)
1144         (let ((code (ccl-get-next-code)))
1145           (insert (format "%c" (lsh code -16)))
1146           (if (< (1+ i) len)
1147               (insert (format "%c" (logand (lsh code -8) 255))))
1148           (if (< (+ i 2) len)
1149               (insert (format "%c" (logand code 255))))
1150           (setq i (+ i 3))))
1151       (insert "\"\n"))))
1152
1153 (defun ccl-dump-write-array (rrr cc)
1154   (let ((i 0))
1155     (insert (format "write array[r%d] of length %d\n\t" rrr cc))
1156     (while (< i cc)
1157       (ccl-dump-insert-char (ccl-get-next-code))
1158       (setq i (1+ i)))
1159     (insert "\n")))
1160
1161 (defun ccl-dump-end (&rest ignore)
1162   (insert "end\n"))
1163
1164 (defun ccl-dump-set-assign-expr-const (rrr cc)
1165   (insert (format "r%d %s= %d\n"
1166                   rrr
1167                   (ccl-extract-arith-op cc)
1168                   (ccl-get-next-code))))
1169
1170 (defun ccl-dump-set-assign-expr-register (rrr cc)
1171   (insert (format "r%d %s= r%d\n"
1172                   rrr
1173                   (ccl-extract-arith-op cc)
1174                   (logand cc 7))))
1175
1176 (defun ccl-dump-set-expr-const (rrr cc)
1177   (insert (format "r%d = r%d %s %d\n"
1178                   rrr
1179                   (logand cc 7)
1180                   (ccl-extract-arith-op cc)
1181                   (ccl-get-next-code))))
1182
1183 (defun ccl-dump-set-expr-register (rrr cc)
1184   (insert (format "r%d = r%d %s r%d\n"
1185                   rrr
1186                   (logand cc 7)
1187                   (ccl-extract-arith-op cc)
1188                   (logand (ash cc -3) 7))))
1189
1190 (defun ccl-dump-jump-cond-expr-const (rrr cc)
1191   (let ((address ccl-current-ic))
1192     (insert (format "if !(r%d %s %d), "
1193                     rrr
1194                     (aref ccl-arith-table (ccl-get-next-code))
1195                     (ccl-get-next-code)))
1196     (ccl-dump-jump nil cc address)))
1197
1198 (defun ccl-dump-jump-cond-expr-register (rrr cc)
1199   (let ((address ccl-current-ic))
1200     (insert (format "if !(r%d %s r%d), "
1201                     rrr
1202                     (aref ccl-arith-table (ccl-get-next-code))
1203                     (ccl-get-next-code)))
1204     (ccl-dump-jump nil cc address)))
1205
1206 (defun ccl-dump-read-jump-cond-expr-const (rrr cc)
1207   (insert (format "read r%d, " rrr))
1208   (ccl-dump-jump-cond-expr-const rrr cc))
1209
1210 (defun ccl-dump-read-jump-cond-expr-register (rrr cc)
1211   (insert (format "read r%d, " rrr))
1212   (ccl-dump-jump-cond-expr-register rrr cc))
1213
1214 (defun ccl-dump-binary (ccl-code)
1215   (let ((len (length ccl-code))
1216         (i 2))
1217     (while (< i len)
1218       (let ((code (aref ccl-code i))
1219             (j 27))
1220         (while (>= j 0)
1221           (insert (if (= (logand code (ash 1 j)) 0) ?0 ?1))
1222           (setq j (1- j)))
1223         (setq code (logand code 31))
1224         (if (< code (length ccl-code-table))
1225             (insert (format ":%s" (aref ccl-code-table code))))
1226         (insert "\n"))
1227       (setq i (1+ i)))))
1228
1229 (defun ccl-dump-ex-cmd (rrr cc)
1230   (let* ((RRR (logand cc ?\x7))
1231          (Rrr (logand (ash cc -3) ?\x7))
1232          (ex-op (aref ccl-extended-code-table (logand (ash cc -6) ?\x3fff))))
1233     (insert (format "<%s> " ex-op))
1234     (funcall (get ex-op 'ccl-dump-function) rrr RRR Rrr)))
1235
1236 (defun ccl-dump-read-multibyte-character (rrr RRR Rrr)
1237   (insert (format "read-multibyte-character r%d r%d\n" RRR rrr)))
1238
1239 (defun ccl-dump-write-multibyte-character (rrr RRR Rrr)
1240   (insert (format "write-multibyte-character r%d r%d\n" RRR rrr)))
1241
1242 (defun ccl-dump-translate-character (rrr RRR Rrr)
1243   (insert (format "translation table(r%d) r%d r%d\n" Rrr RRR rrr)))
1244
1245 (defun ccl-dump-translate-character-const-tbl (rrr RRR Rrr)
1246   (let ((tbl (ccl-get-next-code)))
1247     (insert (format "translation table(%d) r%d r%d\n" tbl RRR rrr))))
1248
1249 (defun ccl-dump-iterate-multiple-map (rrr RRR Rrr)
1250   (let ((notbl (ccl-get-next-code))
1251         (i 0) id)
1252     (insert (format "iterate-multiple-map r%d r%d\n" RRR rrr))
1253     (insert (format "\tnumber of maps is %d .\n\t [" notbl))
1254     (while (< i notbl)
1255       (setq id (ccl-get-next-code))
1256       (insert (format "%S" id))
1257       (setq i (1+ i)))
1258     (insert "]\n")))
1259
1260 (defun ccl-dump-map-multiple (rrr RRR Rrr)
1261   (let ((notbl (ccl-get-next-code))
1262         (i 0) id)
1263     (insert (format "map-multiple r%d r%d\n" RRR rrr))
1264     (insert (format "\tnumber of maps and separators is %d\n\t [" notbl))
1265     (while (< i notbl)
1266       (setq id (ccl-get-next-code))
1267       (if (= id -1)
1268           (insert "]\n\t [")
1269         (insert (format "%S " id)))
1270       (setq i (1+ i)))
1271     (insert "]\n")))
1272
1273 (defun ccl-dump-map-single (rrr RRR Rrr)
1274   (let ((id (ccl-get-next-code)))
1275     (insert (format "map-single r%d r%d map(%S)\n" RRR rrr id))))
1276
1277 \f
1278 ;; CCL emulation staffs
1279
1280 ;; Not yet implemented.
1281 \f
1282 ;; Auto-loaded functions.
1283
1284 ;;;###autoload
1285 (defmacro declare-ccl-program (name &optional vector)
1286   "Declare NAME as a name of CCL program.
1287
1288 To compile a CCL program which calls another CCL program not yet
1289 defined, it must be declared as a CCL program in advance.
1290 Optional arg VECTOR is a compiled CCL code of the CCL program."
1291   `(put ',name 'ccl-program-idx (register-ccl-program ',name ,vector)))
1292
1293 ;;;###autoload
1294 (defmacro define-ccl-program (name ccl-program &optional doc)
1295   "Set NAME the compiled code of CCL-PROGRAM.
1296 CCL-PROGRAM is `eval'ed before being handed to the CCL compiler `ccl-compile'.
1297 The compiled code is a vector of integers."
1298   `(let ((prog ,(ccl-compile (eval ccl-program))))
1299      (defconst ,name prog ,doc)
1300      (put ',name 'ccl-program-idx (register-ccl-program ',name prog))
1301      nil))
1302
1303 ;;;###autoload
1304 (defmacro check-ccl-program (ccl-program &optional name)
1305   "Check validity of CCL-PROGRAM.
1306 If CCL-PROGRAM is a symbol denoting a valid CCL program, return
1307 CCL-PROGRAM, else return nil.
1308 If CCL-PROGRAM is a vector and optional arg NAME (symbol) is supplied,
1309 register CCL-PROGRAM by name NAME, and return NAME."
1310   `(let ((result ,ccl-program))
1311      (cond ((symbolp ,ccl-program)
1312             (or (numberp (get ,ccl-program 'ccl-program-idx))
1313                 (setq result nil)))
1314            ((vectorp ,ccl-program)
1315             (setq result ,name)
1316             (register-ccl-program result ,ccl-program))
1317            (t
1318             (setq result nil)))
1319      result))
1320
1321 ;;;###autoload
1322 (defun ccl-execute-with-args (ccl-prog &rest args)
1323   "Execute CCL-PROGRAM with registers initialized by the remaining args.
1324 The return value is a vector of resulting CCL registers."
1325   (let ((reg (make-vector 8 0))
1326         (i 0))
1327     (while (and args (< i 8))
1328       (if (not (integerp (car args)))
1329           (error "Arguments should be integer"))
1330       (aset reg i (car args))
1331       (setq args (cdr args) i (1+ i)))
1332     (ccl-execute ccl-prog reg)
1333     reg))
1334
1335 (provide 'ccl)
1336
1337 ;; ccl.el ends here