File:  [gforth] / gforth / prims2x.fs
Revision 1.22: download - view: text, annotated - select for diffs
Thu May 23 15:13:12 1996 UTC (23 years, 3 months ago) by anton
Branches: MAIN
CVS tags: HEAD
changed bahviour of system (no longer returns wretval, but puts it in $?)
added (system) ( c_addr u -- wretval wior )
changed close-pipe (now also returns wretval)
changed calls to strncasecmp to memcasecmp

    1: \ converts primitives to, e.g., C code 
    2: 
    3: \ Copyright (C) 1995 Free Software Foundation, Inc.
    4: 
    5: \ This file is part of Gforth.
    6: 
    7: \ Gforth is free software; you can redistribute it and/or
    8: \ modify it under the terms of the GNU General Public License
    9: \ as published by the Free Software Foundation; either version 2
   10: \ of the License, or (at your option) any later version.
   11: 
   12: \ This program is distributed in the hope that it will be useful,
   13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15: \ GNU General Public License for more details.
   16: 
   17: \ You should have received a copy of the GNU General Public License
   18: \ along with this program; if not, write to the Free Software
   19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   20: 
   21: 
   22: \ This is not very nice (hard limits, no checking, assumes 1 chars = 1)
   23: 
   24: \ Optimizations:
   25: \ superfluous stores are removed. GCC removes the superfluous loads by itself
   26: \ TOS and FTOS can be kept in register( variable)s.
   27: \ 
   28: \ Problems:
   29: \ The TOS optimization is somewhat hairy. The problems by example:
   30: \ 1) dup ( w -- w w ): w=TOS; sp-=1; sp[1]=w; TOS=w;
   31: \    The store is not superfluous although the earlier opt. would think so
   32: \    Alternatively:    sp[0]=TOS; w=TOS; sp-=1; TOS=w;
   33: \ 2) ( -- .. ): sp[0] = TOS; ... /* This additional store is necessary */
   34: \ 3) ( .. -- ): ... TOS = sp[0]; /* as well as this load */
   35: \ 4) ( -- ): /* but here they are unnecessary */
   36: \ 5) Words that call NEXT themselves have to be done very carefully.
   37: \
   38: \ To do:
   39: \ add the store optimization for doubles
   40: \ regarding problem 1 above: It would be better (for over) to implement
   41: \ 	the alternative
   42: 
   43: warnings off
   44: 
   45: require interpretation.fs
   46: require debugging.fs
   47: [IFUNDEF] vocabulary    include search-order.fs [THEN]
   48: [IFUNDEF] environment?  include environ.fs      [THEN]
   49: include gray.fs
   50: 
   51: 100 constant max-effect \ number of things on one side of a stack effect
   52: 255 constant maxchar
   53: maxchar 1+ constant eof-char
   54: #tab constant tab-char
   55: #lf constant nl-char
   56: 
   57: : read-whole-file ( c-addr1 file-id -- c-addr2 )
   58: \ reads the contents of the file file-id puts it into memory at c-addr1
   59: \ c-addr2 is the first address after the file block
   60:   >r dup -1 r> read-file throw + ;
   61: 
   62: variable rawinput \ pointer to next character to be scanned
   63: variable endrawinput \ pointer to the end of the input (the char after the last)
   64: variable cookedinput \ pointer to the next char to be parsed
   65: variable line \ line number of char pointed to by input
   66: 1 line !
   67: 2variable filename \ filename of original input file
   68: 0 0 filename 2!
   69: variable skipsynclines \ are sync lines ("#line ...") invisible to the parser?
   70: skipsynclines on 
   71: 
   72: : start ( -- addr )
   73:  cookedinput @ ;
   74: 
   75: : end ( addr -- addr u )
   76:  cookedinput @ over - ;
   77: 
   78: variable output \ xt ( -- ) of output word
   79: 
   80: : printprim ( -- )
   81:  output @ execute ;
   82: 
   83: : field
   84:  <builds-field ( n1 n2 -- n3 )
   85:  does>         ( addr1 -- addr2 )
   86:    @ + ;
   87: 
   88: : const-field
   89:  <builds-field ( n1 n2 -- n3 )
   90:  does>         ( addr -- w )
   91:    @ + @ ;
   92: 
   93: struct
   94:  2 cells field item-name
   95:  cell field item-d-offset
   96:  cell field item-f-offset
   97:  cell field item-type
   98: constant item-descr
   99: 
  100: 2variable forth-name
  101: 2variable wordset
  102: 2variable c-name
  103: 2variable doc
  104: 2variable c-code
  105: 2variable forth-code
  106: 2variable stack-string
  107: create effect-in  max-effect item-descr * allot
  108: create effect-out max-effect item-descr * allot
  109: variable effect-in-end ( pointer )
  110: variable effect-out-end ( pointer )
  111: 2variable effect-in-size
  112: 2variable effect-out-size
  113: variable c-line
  114: 2variable c-filename
  115: variable name-line
  116: 2variable name-filename
  117: 2variable last-name-filename
  118: 
  119: variable primitive-number -10 primitive-number !
  120: 
  121: \ for several reasons stack items of a word are stored in a wordlist
  122: \ since neither forget nor marker are implemented yet, we make a new
  123: \ wordlist for every word and store it in the variable items
  124: variable items
  125: 
  126: \ a few more set ops
  127: 
  128: : bit-equivalent ( w1 w2 -- w3 )
  129:  xor invert ;
  130: 
  131: : complement ( set1 -- set2 )
  132:  empty ['] bit-equivalent binary-set-operation ;
  133: 
  134: \ the parser
  135: 
  136: eof-char max-member \ the whole character set + EOF
  137: 
  138: : getinput ( -- n )
  139:  rawinput @ endrawinput @ =
  140:  if
  141:    eof-char
  142:  else
  143:    cookedinput @ c@
  144:  endif ;
  145: 
  146: :noname ( n -- )
  147:  dup bl > if
  148:   emit space
  149:  else
  150:   .
  151:  endif ;
  152: print-token !
  153: 
  154: : testchar? ( set -- f )
  155:  getinput member? ;
  156: ' testchar? test-vector !
  157: 
  158: : checksyncline ( -- )
  159:     \ when input points to a newline, check if the next line is a
  160:     \ sync line.  If it is, perform the appropriate actions.
  161:     rawinput @ >r
  162:     s" #line " r@ over compare 0<> if
  163: 	rdrop 1 line +! EXIT
  164:     endif
  165:     0. r> 6 chars + 20 >number drop >r drop line ! r> ( c-addr )
  166:     dup c@ bl = if
  167: 	char+ dup c@ [char] " <> abort" sync line syntax"
  168: 	char+ dup 100 [char] " scan drop swap 2dup - save-string filename 2!
  169: 	char+
  170:     endif
  171:     dup c@ nl-char <> abort" sync line syntax"
  172:     skipsynclines @ if
  173: 	dup char+ rawinput !
  174: 	rawinput @ c@ cookedinput @ c!
  175:     endif
  176:     drop ;
  177: 
  178: : ?nextchar ( f -- )
  179:     ?not? if
  180: 	filename 2@ type ." :" line @ 0 .r ." : syntax error, wrong char:"
  181: 	getinput . cr
  182: 	rawinput @ endrawinput @ over - 100 min type cr
  183: 	abort
  184:     endif
  185:     rawinput @ endrawinput @ <> if
  186: 	rawinput @ c@
  187: 	1 chars rawinput +!
  188: 	1 chars cookedinput +!
  189: 	nl-char = if
  190: 	    checksyncline
  191: 	endif
  192: 	rawinput @ c@ cookedinput @ c!
  193:     endif ;
  194: 
  195: : charclass ( set "name" -- )
  196:  ['] ?nextchar terminal ;
  197: 
  198: : .. ( c1 c2 -- set )
  199:  ( creates a set that includes the characters c, c1<=c<=c2 )
  200:  empty copy-set
  201:  swap 1+ rot do
  202:   i over add-member
  203:  loop ;
  204: 
  205: : ` ( -- terminal ) ( use: ` c )
  206:  ( creates anonymous terminal for the character c )
  207:  char singleton ['] ?nextchar make-terminal ;
  208: 
  209: char a char z ..  char A char Z ..  union char _ singleton union  charclass letter
  210: char 0 char 9 ..					charclass digit
  211: bl singleton						charclass blank
  212: tab-char singleton					charclass tab
  213: nl-char singleton eof-char over add-member complement	charclass nonl
  214: nl-char singleton eof-char over add-member char : over add-member complement  charclass nocolonnl
  215: bl 1+ maxchar ..					charclass nowhite
  216: char " singleton eof-char over add-member complement	charclass noquote
  217: nl-char singleton					charclass nl
  218: eof-char singleton					charclass eof
  219: 
  220: 
  221: (( letter (( letter || digit )) **
  222: )) <- c-name ( -- )
  223: 
  224: nowhite ++
  225: <- name ( -- )
  226: 
  227: (( ` \ nonl ** nl
  228: )) <- comment ( -- )
  229: 
  230: (( {{ effect-in }} (( {{ start }} c-name {{ end 2 pick item-name 2! item-descr + }} blank ** )) ** {{ effect-in-end ! }}
  231:    ` - ` - blank **
  232:    {{ effect-out }} (( {{ start }} c-name {{ end 2 pick item-name 2! item-descr + }} blank ** )) ** {{ effect-out-end ! }}
  233: )) <- stack-effect ( -- )
  234: 
  235: (( {{ s" " doc 2! s" " forth-code 2! }}
  236:    (( comment || nl )) **
  237:    (( {{ line @ name-line ! filename 2@ name-filename 2! }}
  238:       {{ start }} name {{ end 2dup forth-name 2! c-name 2! }}  tab ++
  239:       {{ start }} stack-effect {{ end stack-string 2! }} tab ++
  240:         {{ start }} name {{ end wordset 2! }} tab **
  241:         (( {{ start }}  c-name {{ end c-name 2! }} )) ??  nl
  242:    ))
  243:    (( ` " ` "  {{ start }} (( noquote ++ ` " )) ++ {{ end 1- doc 2! }} ` " nl )) ??
  244:    {{ skipsynclines off line @ c-line ! filename 2@ c-filename 2! start }} (( nocolonnl nonl **  nl )) ** {{ end c-code 2! skipsynclines on }}
  245:    (( ` :  nl
  246:       {{ start }} (( nonl ++  nl )) ++ {{ end forth-code 2! }}
  247:    )) ??
  248:    (( nl || eof ))
  249: )) <- primitive ( -- )
  250: 
  251: (( (( primitive {{ printprim }} )) **  eof ))
  252: parser primitives2something
  253: warnings @ [IF]
  254: .( parser generated ok ) cr
  255: [THEN]
  256: 
  257: : primfilter ( file-id xt -- )
  258: \ fileid is for the input file, xt ( -- ) is for the output word
  259:  output !
  260:  here dup rawinput ! cookedinput !
  261:  here swap read-whole-file
  262:  dup endrawinput !
  263:  here - allot
  264:  align
  265:  checksyncline
  266: \ begin
  267: \     getinput dup eof-char = ?EXIT emit true ?nextchar
  268: \ again ;
  269:  primitives2something ;
  270: 
  271: \ types
  272: 
  273: struct
  274:  2 cells field type-c-name
  275:  cell const-field type-d-size
  276:  cell const-field type-f-size
  277:  cell const-field type-fetch-handler
  278:  cell const-field type-store-handler
  279: constant type-description
  280: 
  281: : data-stack-access ( n1 n2 n3 -- )
  282: \ n1 is the offset of the accessed item, n2, n3 are effect-*-size
  283:  drop swap - 1- dup
  284:  if
  285:    ." sp[" 0 .r ." ]"
  286:  else
  287:    drop ." TOS"
  288:  endif ;
  289: 
  290: : fp-stack-access ( n1 n2 n3 -- )
  291: \ n1 is the offset of the accessed item, n2, n3 are effect-*-size
  292:  nip swap - 1- dup
  293:  if
  294:    ." fp[" 0 .r ." ]"
  295:  else
  296:    drop ." FTOS"
  297:  endif ;
  298: 
  299: : fetch-single ( item -- )
  300:  >r
  301:  r@ item-name 2@ type
  302:  ."  = (" 
  303:  r@ item-type @ type-c-name 2@ type ." ) "
  304:  r@ item-d-offset @ effect-in-size 2@ data-stack-access ." ;" cr
  305:  rdrop ; 
  306: 
  307: : fetch-double ( item -- )
  308:  >r
  309:  ." FETCH_DCELL("
  310:  r@ item-name 2@ type ." , "
  311:  r@ item-d-offset @ dup    effect-in-size 2@ data-stack-access
  312:  ." , "			1+ effect-in-size 2@ data-stack-access
  313:  ." );" cr
  314:  rdrop ;
  315: 
  316: : fetch-float ( item -- )
  317:  >r
  318:  r@ item-name 2@ type
  319:  ."  = "
  320:  \ ." (" r@ item-type @ type-c-name 2@ type ." ) "
  321:  r@ item-f-offset @ effect-in-size 2@ fp-stack-access ." ;" cr
  322:  rdrop ;
  323: 
  324: : d-same-as-in? ( item -- f )
  325: \ f is true iff the offset of item is the same as on input
  326:  >r
  327:  r@ item-name 2@ items @ search-wordlist 0=
  328:  abort" bug"
  329:  execute @
  330:  dup r@ =
  331:  if \ item first appeared in output
  332:    drop false
  333:  else
  334:    item-d-offset @ r@ item-d-offset @ =
  335:  endif
  336:  rdrop ;
  337: 
  338: : is-in-tos? ( item -- f )
  339: \ true if item has the same offset as the input TOS
  340:  item-d-offset @ 1+ effect-in-size 2@ drop = ;
  341: 
  342: : really-store-single ( item -- )
  343:  >r
  344:  r@ item-d-offset @ effect-out-size 2@ data-stack-access ."  = (Cell)"
  345:  r@ item-name 2@ type ." ;"
  346:  rdrop ;
  347: 
  348: : store-single ( item -- )
  349:  >r
  350:  r@ d-same-as-in?
  351:  if
  352:    r@ is-in-tos?
  353:    if
  354:      ." IF_TOS(" r@ really-store-single ." );" cr
  355:    endif
  356:  else
  357:    r@ really-store-single cr
  358:  endif
  359:  rdrop ;
  360: 
  361: : store-double ( item -- )
  362: \ !! store optimization is not performed, because it is not yet needed
  363:  >r
  364:  ." STORE_DCELL(" r@ item-name 2@ type ." , "
  365:  r@ item-d-offset @ dup    effect-out-size 2@ data-stack-access
  366:  ." , "			1+ effect-out-size 2@ data-stack-access
  367:  ." );" cr
  368:  rdrop ;
  369: 
  370: : f-same-as-in? ( item -- f )
  371: \ f is true iff the offset of item is the same as on input
  372:  >r
  373:  r@ item-name 2@ items @ search-wordlist 0=
  374:  abort" bug"
  375:  execute @
  376:  dup r@ =
  377:  if \ item first appeared in output
  378:    drop false
  379:  else
  380:    item-f-offset @ r@ item-f-offset @ =
  381:  endif
  382:  rdrop ;
  383: 
  384: : is-in-ftos? ( item -- f )
  385: \ true if item has the same offset as the input TOS
  386:  item-f-offset @ 1+ effect-in-size 2@ nip = ;
  387: 
  388: : really-store-float ( item -- )
  389:  >r
  390:  r@ item-f-offset @ effect-out-size 2@ fp-stack-access ."  = "
  391:  r@ item-name 2@ type ." ;"
  392:  rdrop ;
  393: 
  394: : store-float ( item -- )
  395:  >r
  396:  r@ f-same-as-in?
  397:  if
  398:    r@ is-in-ftos?
  399:    if
  400:      ." IF_FTOS(" r@ really-store-float ." );" cr
  401:    endif
  402:  else
  403:    r@ really-store-float cr
  404:  endif
  405:  rdrop ;
  406:  
  407: : single-type ( -- xt1 xt2 n1 n2 )
  408:  ['] fetch-single ['] store-single 1 0 ;
  409: 
  410: : double-type ( -- xt1 xt2 n1 n2 )
  411:  ['] fetch-double ['] store-double 2 0 ;
  412: 
  413: : float-type ( -- xt1 xt2 n1 n2 )
  414:  ['] fetch-float ['] store-float 0 1 ;
  415: 
  416: : s, ( addr u -- )
  417: \ allocate a string
  418:  here swap dup allot move ;
  419: 
  420: : starts-with ( addr u xt1 xt2 n1 n2 "prefix" -- )
  421: \ describes a type
  422: \ addr u specifies the C type name
  423: \ n1 is the size of the type on the data stack
  424: \ n2 is the size of the type on the FP stack
  425: \ stack effect entries of the type start with prefix
  426:  >r >r >r >r
  427:  dup >r here >r s,
  428:  create
  429:  r> r> 2,
  430:  r> r> r> , r> , swap , , ;
  431: 
  432: wordlist constant types
  433: get-current
  434: types set-current
  435: 
  436: s" Bool"	single-type starts-with f
  437: s" Char"	single-type starts-with c
  438: s" Cell"	single-type starts-with n
  439: s" Cell"	single-type starts-with w
  440: s" UCell"	single-type starts-with u
  441: s" DCell"	double-type starts-with d
  442: s" UDCell"	double-type starts-with ud
  443: s" Float"	float-type  starts-with r
  444: s" Cell *"	single-type starts-with a_
  445: s" Char *"	single-type starts-with c_
  446: s" Float *"	single-type starts-with f_
  447: s" DFloat *"	single-type starts-with df_
  448: s" SFloat *"	single-type starts-with sf_
  449: s" Xt"		single-type starts-with xt
  450: s" WID"		single-type starts-with wid
  451: s" F83Name *"	single-type starts-with f83name
  452: 
  453: set-current
  454: 
  455: : get-type ( addr1 u1 -- type-descr )
  456: \ get the type of the name in addr1 u1
  457: \ type-descr is a pointer to a type-descriptor
  458:  0 swap ?do
  459:    dup i types search-wordlist
  460:    if \ ok, we have the type ( addr1 xt )
  461:      execute nip
  462:      UNLOOP EXIT
  463:    endif
  464:  -1 s+loop
  465:  \ we did not find a type, abort
  466:  true abort" unknown type prefix" ;
  467: 
  468: : declare ( addr "name" -- )
  469: \ remember that there is a stack item at addr called name
  470:  create , ;
  471: 
  472: : declaration ( item -- )
  473:  dup item-name 2@ items @ search-wordlist
  474:  if \ already declared ( item xt )
  475:    execute @ item-type @ swap item-type !
  476:  else ( addr )
  477:    dup item-name 2@ nextname dup declare ( addr )
  478:    dup >r item-name 2@ 2dup get-type ( addr1 u type-descr )
  479:    dup r> item-type ! ( addr1 u type-descr )
  480:    type-c-name 2@ type space type ." ;" cr
  481:  endif ;
  482: 
  483: : declaration-list ( addr1 addr2 -- )
  484:  swap ?do
  485:   i declaration
  486:  item-descr +loop ;
  487: 
  488: : fetch ( addr -- )
  489:  dup item-type @ type-fetch-handler execute ;
  490: 
  491: : declarations ( -- )
  492:  wordlist dup items ! set-current
  493:  effect-in effect-in-end @ declaration-list
  494:  effect-out effect-out-end @ declaration-list ;
  495: 
  496: \ offset computation
  497: \ the leftmost (i.e. deepest) item has offset 0
  498: \ the rightmost item has the highest offset
  499: 
  500: : compute-offset ( n1 n2 item -- n3 n4 )
  501: \ n1, n3 are data-stack-offsets
  502: \ n2, n4 are the fp-stack-offsets
  503:  >r
  504:  swap dup r@ item-d-offset !
  505:  r@ item-type @ type-d-size +
  506:  swap dup r@ item-f-offset !
  507:  r@ item-type @ type-f-size +
  508:  rdrop ;
  509: 
  510: : compute-list ( addr1 addr2 -- n1 n2 )
  511: \ n1, n2 are the final offsets
  512:  0 0 2swap swap ?do
  513:   i compute-offset
  514:  item-descr +loop ;
  515: 
  516: : compute-offsets ( -- )
  517:  effect-in effect-in-end @ compute-list effect-in-size 2!
  518:  effect-out effect-out-end @ compute-list effect-out-size 2! ;
  519: 
  520: : flush-tos ( -- )
  521:  effect-in-size 2@ effect-out-size 2@
  522:  0<> rot 0= and
  523:  if
  524:    ." IF_FTOS(fp[0] = FTOS);" cr
  525:  endif
  526:  0<> swap 0= and
  527:  if
  528:    ." IF_TOS(sp[0] = TOS);" cr
  529:  endif ;
  530: 
  531: : fill-tos ( -- )
  532:  effect-in-size 2@ effect-out-size 2@
  533:  0= rot 0<> and
  534:  if
  535:    ." IF_FTOS(FTOS = fp[0]);" cr
  536:  endif
  537:  0= swap 0<> and
  538:  if
  539:    ." IF_TOS(TOS = sp[0]);" cr
  540:  endif ;
  541: 
  542: : fetches ( -- )
  543:  effect-in-end @ effect-in ?do
  544:    i fetch
  545:  item-descr +loop ; 
  546: 
  547: : stack-pointer-updates ( -- )
  548: \ we need not check if an update is a noop; gcc does this for us
  549:  effect-in-size 2@
  550:  effect-out-size 2@
  551:  rot swap - ( d-in d-out f-diff )
  552:  rot rot - ( f-diff d-diff )
  553:  ?dup IF  ." sp += " 0 .r ." ;" cr  THEN
  554:  ?dup IF  ." fp += " 0 .r ." ;" cr  THEN ;
  555: 
  556: : store ( item -- )
  557: \ f is true if the item should be stored
  558: \ f is false if the store is probably not necessary
  559:  dup item-type @ type-store-handler execute ;
  560: 
  561: : stores ( -- )
  562:  effect-out-end @ effect-out ?do
  563:    i store
  564:  item-descr +loop ; 
  565: 
  566: : .stack-list ( start end -- )
  567:  swap ?do
  568:    i item-name 2@ type space
  569:  item-descr +loop ; 
  570: 
  571: : output-c ( -- )
  572:  ." I_" c-name 2@ type ." :	/* " forth-name 2@ type ."  ( " stack-string 2@ type ."  ) */" cr
  573:  ." /* " doc 2@ type ."  */" cr
  574:  ." NAME(" [char] " emit forth-name 2@ type [char] " emit ." )" cr \ debugging
  575:  ." {" cr
  576:  ." DEF_CA" cr
  577:  declarations
  578:  compute-offsets \ for everything else
  579:  ." NEXT_P0;" cr
  580:  flush-tos
  581:  fetches
  582:  stack-pointer-updates
  583:  ." {" cr
  584:  ." #line " c-line @ . [char] " emit c-filename 2@ type [char] " emit cr
  585:  c-code 2@ type
  586:  ." }" cr
  587:  ." NEXT_P1;" cr
  588:  stores
  589:  fill-tos
  590:  ." NEXT_P2;" cr
  591:  ." }" cr
  592:  cr
  593: ;
  594: 
  595: : output-label ( -- )
  596:  ." &&I_" c-name 2@ type ." ," cr ;
  597: 
  598: : output-alias ( -- )
  599:  primitive-number @ . ." alias " forth-name 2@ type cr
  600:  -1 primitive-number +! ;
  601: 
  602: : output-forth ( -- )
  603:  forth-code @ 0=
  604:  IF    output-alias
  605:  ELSE  ." : " forth-name 2@ type ."   ( "
  606:        effect-in effect-in-end @ .stack-list ." -- "
  607:        effect-out effect-out-end @ .stack-list ." )" cr
  608:        forth-code 2@ type cr
  609:        -1 primitive-number +!
  610:  THEN ;
  611: 
  612: : output-tag-file ( -- )
  613:     name-filename 2@ last-name-filename 2@ compare if
  614: 	name-filename 2@ last-name-filename 2!
  615: 	#ff emit cr
  616: 	name-filename 2@ type
  617: 	." ,0" cr
  618:     endif ;
  619: 
  620: : output-tag ( -- )
  621:     output-tag-file
  622:     forth-name 2@ 1+ type
  623:     127 emit
  624:     space forth-name 2@ type space
  625:     1 emit
  626:     name-line @ 0 .r
  627:     ." ,0" cr ;
  628: 
  629: [IFDEF] documentation
  630: : register-doc ( -- )
  631:     get-current documentation set-current
  632:     forth-name 2@ nextname create
  633:     forth-name 2@ 2,
  634:     stack-string 2@ condition-stack-effect 2,
  635:     wordset 2@ 2,
  636:     c-name 2@ condition-pronounciation 2,
  637:     doc 2@ 2,
  638:     set-current ;
  639: [THEN]
  640: 
  641: : process-file ( addr u xt -- )
  642:     >r
  643:     2dup filename 2!
  644:     r/o open-file abort" cannot open file"
  645:     warnings @ if
  646: 	." ------------ CUT HERE -------------" cr  endif
  647:     r> primfilter ;
  648: 

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