[gforth] / gforth / see.fs  

gforth: gforth/see.fs

Diff for /gforth/see.fs between version 1.18 and 1.35

version 1.18, Sun Jul 6 14:29:34 1997 UTC version 1.35, Sat Mar 17 21:36:41 2001 UTC
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 \ SEE.FS       highend SEE for ANSforth                16may93jaw  \ SEE.FS       highend SEE for ANSforth                16may93jaw
   
 \ Copyright (C) 1995 Free Software Foundation, Inc.  \ Copyright (C) 1995,2000 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
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 \ You should have received a copy of the GNU General Public License  \ You should have received a copy of the GNU General Public License
 \ along with this program; if not, write to the Free Software  \ along with this program; if not, write to the Free Software
 \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   
   
 \ May be cross-compiled  \ May be cross-compiled
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 require look.fs  require look.fs
 require termsize.fs  require termsize.fs
 require wordinfo.fs  require wordinfo.fs
 [IFUNDEF] .name : .name name>string type space ; [THEN]  [IFUNDEF] .name
   : id. ( nt -- ) \ gforth
       \G Print the name of the word represented by @var{nt}.
       \ this name comes from fig-Forth
       name>string type space ;
   
   ' id. alias .id ( nt -- )
   \G F83 name for @code{id.}.
   
   ' id. alias .name ( nt -- )
   \G Gforth <=0.5.0 name for @code{id.}.
   
   [THEN]
   
 decimal  decimal
   
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                 nlflag @ IF (nl) nlflag off THEN                  nlflag @ IF (nl) nlflag off THEN
                 XPos @ over + cols u>= IF (nl) THEN ;                  XPos @ over + cols u>= IF (nl) THEN ;
   
 : c-to-upper  : c-to-upper ( c1 -- c2 ) \ gforth
       \ nac05feb1999 there is a primitive, toupper, with this function
   dup [char] a >= over [char] z <= and if  bl -  then ;    dup [char] a >= over [char] z <= and if  bl -  then ;
   
 : ctype         ( adr len -- )  : ctype         ( adr len -- )
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                 IF 2drop ELSE XPos +! C-Output @ IF emit ELSE drop THEN                  IF 2drop ELSE XPos +! C-Output @ IF emit ELSE drop THEN
                 THEN ;                  THEN ;
   
 DEFER .string  DEFER .string ( c-addr u n -- )
   
 [IFDEF] Green  [IFDEF] Green
 VARIABLE Colors Colors on  VARIABLE Colors Colors on
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 \ The branchtable consists of three entrys:  \ The branchtable consists of three entrys:
 \ address of branch , branch destination , branch type  \ address of branch , branch destination , branch type
   
 CREATE BranchTable 500 allot  CREATE BranchTable 128 cells allot
 here 3 cells -  here 3 cells -
 ACONSTANT MaxTable  ACONSTANT MaxTable
   
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 : back? ( n -- flag ) 0< ;  : back? ( n -- flag ) 0< ;
 : ahead? ( n -- flag ) 0> ;  : ahead? ( n -- flag ) 0> ;
   
 : c-(compile)  
     Display?  
     IF  
         s" POSTPONE " Com# .string  
         dup @ look 0= ABORT" SEE: No valid XT"  
         name>string 0 .string bl cemit  
     THEN  
     cell+ ;  
   
 : c-lit  : c-lit
     Display? IF      Display? IF
         dup @ dup abs 0 <# #S rot sign #> 0 .string bl cemit          dup @ dup abs 0 <# #S rot sign #> 0 .string bl cemit
     THEN      THEN
     cell+ ;      cell+ ;
   
   : .word
       look 0= IF
           drop dup 1 cells - @ ." <" 0 .r ." >"
       ELSE
           dup cell+ @ immediate-mask and
           IF
               bl cemit  ." POSTPONE "
           THEN
           dup name>string rot wordinfo .string
       THEN ;
   
   : c-call
       Display? IF  dup @ body> .word bl cemit  THEN  cell+ ;
   
 : .name-without ( addr -- addr )  : .name-without ( addr -- addr )
 \ prints a name without () e.g. (+LOOP) or (s")  \ prints a name without () e.g. (+LOOP) or (s")
   dup 1 cells - @ look    dup 1 cells - @ look
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         THEN          THEN
         Debug? IF drop THEN ;          Debug? IF drop THEN ;
   
 : c-does>               \ end of create part  
         Display? IF S" DOES> " Com# .string THEN  
         Cell+ cell+ ;  
   
 : c-abort"  : c-abort"
         count 2dup + aligned -rot          count 2dup + aligned -rot
         Display?          Display?
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         ELSE    2drop          ELSE    2drop
         THEN ;          THEN ;
   
   [IFDEF] (does>)
   : c-does>               \ end of create part
           Display? IF S" DOES> " Com# .string THEN
           maxaligned /does-handler + ;
   [THEN]
   
   [IFDEF] (compile)
   : c-(compile)
       Display?
       IF
           s" POSTPONE " Com# .string
           dup @ look 0= ABORT" SEE: No valid XT"
           name>string 0 .string bl cemit
       THEN
       cell+ ;
   [THEN]
   
 CREATE C-Table  CREATE C-Table
                 ' lit A,            ' c-lit A,                  ' lit A,            ' c-lit A,
                   ' call A,           ' c-call A,
                 ' (s") A,           ' c-c" A,                  ' (s") A,           ' c-c" A,
                  ' (.") A,          ' c-c" A,                   ' (.") A,          ' c-c" A,
                 ' "lit A,           ' c-c" A,                  ' "lit A,           ' c-c" A,
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 [IFDEF] (-loop) ' (-loop) A,        ' c-loop A, [THEN]  [IFDEF] (-loop) ' (-loop) A,        ' c-loop A, [THEN]
                 ' (next) A,         ' c-loop A,                  ' (next) A,         ' c-loop A,
                 ' ;s A,             ' c-exit A,                  ' ;s A,             ' c-exit A,
                 ' (does>) A,        ' c-does> A,  
                 ' (abort") A,       ' c-abort" A,                  ' (abort") A,       ' c-abort" A,
                 ' (compile) A,      ' c-(compile) A,  \ only defined if compiler is loaded
   [IFDEF] (compile) ' (compile) A,      ' c-(compile) A, [THEN]
   [IFDEF] (does>) ' (does>) A,        ' c-does> A, [THEN]
                 0 ,             here 0 ,                  0 ,             here 0 ,
   
 avariable c-extender  avariable c-extender
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         dup cell+ swap @          dup cell+ swap @
         dup >r DoTable r> swap IF drop EXIT THEN          dup >r DoTable r> swap IF drop EXIT THEN
         Display?          Display?
         IF look 0= IF  drop dup 1 cells - @ .  \ ABORT" SEE: Bua!"      IF
           .word bl cemit
         ELSE          ELSE
             dup cell+ count dup immediate-mask and          drop
             IF  bl cemit  ." POSTPONE " THEN  
             31 and rot wordinfo .string  THEN  bl cemit  
         ELSE drop  
         THEN ;          THEN ;
   
 : c-init  : c-init
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     then      then
     space ;      space ;
   
 Defer discode ( addr -- )  Defer discode ( addr u -- ) \ gforth
 \  hook for the disassembler: disassemble code at addr (as far as the  \G hook for the disassembler: disassemble code at addr of length u
 \  disassembler thinks is sensible)  ' dump IS discode
 :noname ( addr -- )  
     drop ." ..." ;  : next-head ( addr1 -- addr2 ) \ gforth
 IS discode      \G find the next header starting after addr1, up to here (unreliable).
       here swap u+do
           i head?
           if
               i unloop exit
           then
       cell +loop
       here ;
   
   : umin ( u1 u2 -- u )
       2dup u>
       if
           swap
       then
       drop ;
   
   : next-prim ( addr1 -- addr2 ) \ gforth
       \G find the next primitive after addr1 (unreliable)
       1+ >r -1 primstart
       begin ( umin head R: boundary )
           @ dup
       while
           tuck name>int >code-address ( head1 umin ca R: boundary )
           r@ - umin
           swap
       repeat
       drop dup r@ negate u>=
       \ "umin+boundary within [0,boundary)" = "umin within [-boundary,0)"
       if ( umin R: boundary ) \ no primitive found behind -> use a default length
           drop 31
       then
       r> + ;
   
 : seecode ( xt -- )  : seecode ( xt -- )
     dup s" Code" .defname      dup s" Code" .defname
     >body discode      threading-method
       if
           >code-address
       then
       dup in-dictionary? \ user-defined code word?
       if
           dup next-head
       else
           dup next-prim
       then
       over - discode
     ."  end-code" cr ;      ."  end-code" cr ;
 : seevar ( xt -- )  : seevar ( xt -- )
     s" Variable" .defname cr ;      s" Variable" .defname cr ;
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 : seedefer ( xt -- )  : seedefer ( xt -- )
     dup >body @ xt-see-xt cr      dup >body @ xt-see-xt cr
     dup s" Defer" .defname cr      dup s" Defer" .defname cr
     >name dup ??? = if      >name ?dup-if
         drop ." lastxt >body !"  
     else  
         ." IS " .name cr          ." IS " .name cr
       else
           ." lastxt >body !"
     then ;      then ;
 : see-threaded ( addr -- )  : see-threaded ( addr -- )
     C-Pass @ DebugMode = IF      C-Pass @ DebugMode = IF
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     dup >body ." 0 " ? ." 0 0 "      dup >body ." 0 " ? ." 0 0 "
     s" Field" .defname cr ;      s" Field" .defname cr ;
   
 : xt-see ( xt -- )  : xt-see ( xt -- ) \ gforth
       \G Decompile the definition represented by @i{xt}.
     cr c-init      cr c-init
     dup >does-code      dup >does-code
     if      if
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 [ [IFDEF] dofield: ]  [ [IFDEF] dofield: ]
         dofield: of seefield endof          dofield: of seefield endof
 [ [THEN] ]  [ [THEN] ]
         over >body of seecode endof          over       of seecode endof \ direct threaded code words
           over >body of seecode endof \ indirect threaded code words
         2drop abort" unknown word type"          2drop abort" unknown word type"
     ENDCASE ;      ENDCASE ;
   
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     then      then
     rdrop drop ;      rdrop drop ;
   
 : see ( "name" -- ) \ tools  : see ( "<spaces>name" -- ) \ tools
       \G Locate @var{name} using the current search order. Display the
       \G definition of @var{name}. Since this is achieved by decompiling
       \G the definition, the formatting is mechanised and some source
       \G information (comments, interpreted sequences within definitions
       \G etc.) is lost.
     name find-name dup 0=      name find-name dup 0=
     IF      IF
         drop -&13 bounce          drop -&13 throw
     THEN      THEN
     name-see ;      name-see ;
   

Generate output suitable for use with a patch program
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changed lines
  Added in v.1.35
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