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\ SEE.FS highend SEE for ANSforth 16may93jaw
\ Authors: Bernd Paysan, Anton Ertl, David Kühling, Jens Wilke, Neal Crook
\ Copyright (C) 1995,2000,2003,2004,2006,2007,2008,2010,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023,2024 Free Software Foundation, Inc.
\ This file is part of Gforth.
\ Gforth 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 3
\ of the License, or (at your option) any later version.
\ This program 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 this program. If not, see http://www.gnu.org/licenses/.
\ May be cross-compiled
\ I'm sorry. This is really not "forthy" enough.
\ Ideas: Level should be a stack
require look.fs
require wordinfo.fs
decimal
Vocabulary see-voc
get-current also see-voc definitions
\ Screen format words 16may93jaw
VARIABLE C-Output 1 C-Output !
VARIABLE C-Formated 1 C-Formated !
VARIABLE C-Highlight 0 C-Highlight !
VARIABLE C-Clearline 0 C-Clearline !
VARIABLE XPos
VARIABLE YPos
VARIABLE Level
: Format ( u -- )
C-Formated @ C-Output @ and if ( u )
dup spaces dup XPos +! then
drop ;
: level+ ( -- )
7 Level +!
Level @ XPos @ - dup 0> IF Format ELSE drop THEN ;
: level- ( -- )
-7 Level +! ;
VARIABLE nlflag
VARIABLE uppercase \ structure words are in uppercase
DEFER nlcount ( -- )
' noop IS nlcount
: nl ( -- )
nlflag on ;
: (nl) ( -- )
nlcount
XPos @ Level @ = IF EXIT THEN \ ?Exit
C-Formated @ IF
C-Output @ IF
C-Clearline @ IF
cols XPos @ - spaces
ELSE
cr THEN
1 YPos +! 0 XPos !
Level @ spaces THEN
Level @ XPos ! THEN ;
: warp? ( len -- len )
nlflag @ IF (nl) nlflag off THEN
XPos @ over + cols u>= IF (nl) THEN ;
: ctype ( adr len -- )
warp? dup XPos +! C-Output @
IF uppercase @ IF bounds ?DO i c@ toupper emit LOOP
uppercase off ELSE type THEN
ELSE 2drop THEN ;
: cemit ( c -- )
1 warp?
over bl = Level @ XPos @ = and IF
2drop
ELSE
XPos +! C-Output @ IF emit ELSE drop THEN
THEN ;
Defer xt-see-xt ( xt -- )
\ this one is just a forward declaration for indirect recursion
: .defname ( xt c-addr u -- )
rot look
if ( c-addr u nfa )
-rot type space id.
else
drop ." noname " type
then
space ;
dup set-current
Defer discode ( addr u -- ) \ gforth
\G hook for the disassembler: disassemble u bytes of code at addr
' dump IS discode
definitions
: (next-head) ( addr1 addr2 -- addr )
tuck >r u+do
i xt? if
i dup >cfa swap name>string drop cell negate and dup 0= select
unloop rdrop exit
then
cell +loop
r> ;
: next-head ( addr1 -- addr2 ) \ gforth-internal
\G find the next header starting after addr1, up to here (unreliable).
[ cell body> ] Literal +
dup which-section? ?dup-IF
[: section-dp @ (next-head) ;] swap section-execute
ELSE
here (next-head)
THEN ;
: next-prim ( addr1 -- addr2 ) \ gforth-internal
\G find the next primitive after addr1 (unreliable)
1+ >r -1 primstart
begin ( umin head R: boundary )
>link @ dup
while
tuck ( name>interpret ) >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> + ;
DEFER .string ( c-addr u xt -- )
: (.string) ( c-addr u xt -- )
[: execute ctype ;] execute-theme-color ;
' (.string) IS .string
: c-\emit ( c -- )
\ show char in \-escaped form; note that newlines can have
\ two chars, so they need to be handled at the string level.
dup '" = over '\ = or if
'\ cemit cemit
else
dup bl 127 within if
cemit
else
base @ { oldbase } try
$10 base ! 0 <<# # # 'x' hold '\' hold #> ctype #>> 0
restore
oldbase base !
endtry
throw
endif
endif ;
: c-\type ( c-addr u -- )
\ type string in \-escaped form
begin
dup while
2dup newline string-prefix? if
'\ cemit 'n cemit
newline nip /string
else
over c@ c-\emit 1 /string
endif
repeat
2drop ;
\ DEFER CheckUntil
VARIABLE NoOutput
VARIABLE C-Pass
0 CONSTANT ScanMode
1 CONSTANT DisplayMode
2 CONSTANT DebugMode
: Scan? ( -- flag ) C-Pass @ 0= ;
: Display? ( -- flag ) C-Pass @ 1 = ;
: Debug? ( -- flag ) C-Pass @ 2 = ;
: ?.string ( c-addr u xt -- ) Display? if .string else 2drop drop then ;
Defer see-threaded
\ The branchtable consists of three entrys:
\ address of branch , branch destination , branch type
CREATE BranchTable 128 cells allot
here 3 cells -
ACONSTANT MaxTable
VARIABLE BranchPointer \ point to the end of branch table
VARIABLE SearchPointer
VARIABLE C-Stop
\ try see quotations, but so far fails, because can't reenter see-threaded
: smart.quotation. ( n depth -- t / n f )
drop dup xt? IF
dup name>string d0= IF
dup >code-address docol: = IF
s" [: " ['] Com-color .string
BranchPointer @ BranchTable
{ bp SaveTable[ 128 cells ] }
2 Level +! >body see-threaded -2 Level +!
SaveTable[ BranchTable 128 cells move
bp BranchPointer ! C-Stop off
s" ] " ['] Com-color .string
true EXIT THEN THEN THEN
false ;
: c-lits ( -- )
display? IF
sp@ >r smart.s-skip off
['] smart.quotation. smart<> >back
litstack get-stack litstack $free
dup 0 ?DO dup I - pick smart.s. LOOP drop
smart<> back> drop r> sp!
ELSE
litstack $free
THEN ;
Variable struct-pre
: .struc ( c-addr u -- )
c-lits uppercase on ['] Str-color
struct-pre $@ ['] Str-color .string
.string struct-pre $free ;
\ CODES (Branchtypes) 15may93jaw
21 Constant RepeatCode
22 Constant AgainCode
23 Constant UntilCode
24 Constant LoopCode
\ 09 CONSTANT WhileCode
10 Constant ElseCode
11 Constant AheadCode
13 Constant WhileCode2
14 Constant Disable
15 Constant LeaveCode
\ FORMAT WORDS 13jun93jaw
VARIABLE Branches
: FirstBranch ( -- )
BranchTable cell+ SearchPointer ! ;
: (BranchAddr?) ( a-addr1 -- a-addr2 true | false )
\ searches a branch with destination a-addr1
\ a-addr1: branch destination
\ a-addr2: pointer in branch table
SearchPointer @ BEGIN
dup BranchPointer @ u< WHILE
dup @ third <> WHILE
3 cells +
REPEAT
nip dup 3 cells + SearchPointer ! true
ELSE
2drop false THEN ;
: BranchAddr? ( a-addr1 -- a-addr2 true | false )
FirstBranch (BranchAddr?) ;
' (BranchAddr?) ALIAS MoreBranchAddr? ( a-addr1 -- a-addr2 true | false )
: CheckEnd ( a-addr -- true | false )
BranchTable cell+ BEGIN
dup BranchPointer @ u< WHILE
dup @ third u<= WHILE
3 cells + REPEAT
2drop false
ELSE
2drop true THEN ;
?: cell- ( addr1 -- addr2 ) cell - ;
: MyBranch ( a-addr -- a-addr a-addr2 )
\ finds branch table entry for branch at a-addr
dup @ BranchAddr? BEGIN
WHILE
cell- @ over <> WHILE
dup @ MoreBranchAddr? REPEAT
SearchPointer @ 3 cells -
ELSE
true ABORT" SEE: Table failure" THEN ;
\
\ addrw addrt
\ BEGIN ... WHILE ... AGAIN ... THEN
\ ^ ! ! ^
\ ----------+--------+ !
\ ! !
\ +-------------------+
\
\
: CheckWhile ( a-addrw a-addrt -- true | false )
BranchTable >r BEGIN
r@ BranchPointer @ u< WHILE
2dup r@ @ within IF
over r@ cell+ @ u> IF
2drop rdrop true EXIT THEN
THEN
r> 3 cells + >r REPEAT
2drop rdrop false ;
: ,Branch ( a-addr -- )
BranchPointer @ dup MaxTable u> ABORT" SEE: Table overflow"
!
1 cells BranchPointer +! ;
: Type! ( u -- )
BranchPointer @ cell- ! ;
: Branch! ( a-addr rel -- a-addr )
over ,Branch ,Branch 0 ,Branch ;
\ over + over ,Branch ,Branch 0 ,Branch ;
: back? ( addr target -- addr flag )
over u< ;
: .word1 ( addr x -- addr )
\ print x as a word if possible; for primitives, x must be fetched
\ with @decompile-prim
dup look 0= IF
drop dup threaded>name dup 0= if
drop over cell- @ dup body> look IF
nip nip dup ." <" name>string rot wordinfo .string ." > "
ELSE
2drop smart.
THEN
EXIT
then
THEN
nip dup immediate? IF
bl cemit ." [COMPILE] "
THEN
dup name>string rot wordinfo .string
;
: c-call ( addr1 -- addr2 )
Display? IF
dup @ body> .word1 bl cemit
THEN
cell+ ;
: c-callxt ( addr1 -- addr2 )
Display? IF
dup @ .word1 bl cemit
THEN
cell+ ;
\ here docon: , docol: , dovar: , douser: , dodefer: , dofield: ,
\ here over - 2constant doers
[IFDEF] !does
: c-does> ( -- )
\ end of create part
Display? IF S" DOES> " ['] Com-color .string THEN ;
\ maxaligned /does-handler + ; \ !! no longer needed for non-cross stuff
[THEN]
: c># ( n -- addr u ) `smart. $tmp ;
: c-. ( n -- ) c># ['] default-color .string ;
: c>lit ( addr1 -- addr2 )
dup @ >lits cell+ ;
: c-lit ( addr1 -- addr2 )
dup @ dup body> dup cfaligned over = swap in-dictionary? and if
( addr1 addr1@ )
dup body> >code-address dovar: = if
drop c-call EXIT
endif
endif
over 4 cells + over = if
over 1 cells + @decompile-prim ['] call xt= >r
over 3 cells + @decompile-prim ['] ;S xt=
r> and if
over 2 cells + @ ['] set-does> >body = if drop
S" DOES> " ['] Com-color ?.string 4 cells + EXIT endif
endif
[IFDEF] !;abi-code
over 2 cells + @ ['] !;abi-code >body = if drop
S" ;abi-code " ['] Com-color ?.string 4 cells +
c-stop on
Display? if
dup dup next-head over - discode
S" end-code" ['] Com-color ?.string
then EXIT
endif
[THEN]
endif
Display? if ( addr1 addr1@ )
dup c-. then
drop cell+ ;
: c-lit+ ( addr1 -- addr2 )
Display? if
dup @ c-.
s" + " ['] default-color .string
endif
cell+ ;
: c-lit@ ( addr1 -- addr2 )
Display? if
dup @
dup body> xt? IF
dup body> >code-address dovalue: = IF
dup body> name>string dup IF
['] val-color .string space drop cell+ EXIT
ELSE 2drop THEN THEN THEN
c-. s" @ " ['] default-color .string
then
cell+ ;
: id.-without ( addr -- addr )
\ !! the stack effect cannot be correct
\ prints a name without () and without -LP+!#, e.g. a (+LOOP) or (s")
dup cell- @threaded>name dup IF
dup ``(/loop) = over ``(/loop)-lp+!# = or if drop ``+loop then
name>string over c@ '( = IF
1 /string
THEN
2dup "-lp+!#" string-suffix? if 6 - then
2dup + 1- c@ ') = IF 1- THEN
.struc
ELSE
drop THEN ;
: c-c"
Display? IF nl id.-without THEN
count 2dup + aligned -rot
Display?
IF bl cemit ['] default-color .string
'"' cemit bl cemit
ELSE 2drop
THEN ;
: c-string? ( addr1 -- addr2 f )
\ f is true if a string was found and decompiled.
\ if f is false, addr2=addr1
\ recognizes the following patterns:
\ c": ahead X: len string then lit X
\ flit: ahead X: float then lit X f@
\ s\": ahead X: string then lit X lit len
\ .\": ahead X: string then lit X lit len type
\ !! not recognized anywhere:
\ abort": if ahead X: len string then lit X c(abort") then
dup @ back? if false exit endif
dup @ dup
>r @decompile-prim ['] lit xt= 0= if rdrop false exit endif
r@ cell+ @ over cell+ <> if rdrop false exit endif
\ we have at least C"
r@ 2 cells + @decompile-prim dup ['] lit xt= if
drop r@ 3 cells + @ over cell+ + aligned r@ = if
\ we have at least s"
r@ 4 cells + @decompile-prim ['] lit-perform xt=
r@ 5 cells + @ ['] type >body = and if
6 s\" .\\\" "
else
4 s\" s\\\" "
endif
\ !! make newline if string too long?
display? if
['] default-color .string r@ cell+ @ r@ 3 cells + @ c-\type '" cemit bl cemit
else
2drop
endif
nip cells r> + true exit
endif
endif
['] f@ xt= if
display? if
r@ cell+ @ f@ 10 8 16 f>str-rdp ['] default-color .string bl cemit
endif
drop r> 3 cells + true exit
endif
\ !! check if count matches space?
display? if
s\" c\" " ['] default-color .string r@ cell+ @ count ['] default-color .string '" cemit bl cemit
endif
drop r> 2 cells + true ;
: Forward? ( a-addr true | false -- a-addr true | false )
\ a-addr is pointer into branch table
\ returns true when jump is a forward jump
IF
dup dup @ swap cell- @ u> IF
true
ELSE
drop false
THEN
\ only if forward jump
ELSE
false
THEN ;
: RepeatCheck ( a-addr1 a-addr2 true | false -- false )
IF
BEGIN
2dup cell- @ swap @ u<= WHILE
drop dup cell+ MoreBranchAddr? 0=
UNTIL
false
ELSE
true THEN
ELSE
false THEN ;
: c-branch ( addr1 -- addr2 )
c-string? ?exit Scan? IF
dup @ Branch! dup @ back? IF
\ might be: AGAIN, REPEAT
dup cell+ BranchAddr? Forward? RepeatCheck IF
RepeatCode Type! cell+ Disable swap !
ELSE
AgainCode Type! THEN
ELSE
dup cell+ BranchAddr? Forward? IF
ElseCode Type! drop
ELSE
AheadCode Type! THEN
THEN
THEN
Display? IF
dup @ back? IF
\ might be: AGAIN, REPEAT
level- nl dup cell+ BranchAddr? Forward? RepeatCheck IF
drop S" REPEAT " .struc nl
ELSE
S" AGAIN " .struc nl THEN
ELSE
MyBranch cell+ @ LeaveCode = IF
S" LEAVE " .struc
ELSE
dup cell+ BranchAddr? Forward? IF
dup cell+ @ WhileCode2 = IF
nl S" ELSE " .struc level+
ELSE
level- nl S" ELSE" .struc level+ THEN
cell+ Disable swap !
ELSE
S" AHEAD " .struc level+ THEN
THEN
THEN
THEN
Debug? IF
@ \ !!! cross-interacts with debugger !!!
ELSE
cell+ THEN ;
: DebugBranch ( addr -- x addr | addr )
\ !! reconstructed stack effect, code looks broken
\ should probably be ( addr -- addr )
Debug? IF
dup @ swap THEN ; \ return 2 different addresses
: c-?branch ( addr -- addr2 )
Scan? IF
dup @ Branch! dup @ Back? IF ( addr )
UntilCode Type! THEN
THEN ( addr )
Display? IF
dup @ Back? IF ( addr )
level- nl S" UNTIL " .struc nl
ELSE
dup dup @ CheckWhile IF ( addr )
MyBranch cell+ dup @ 0= IF ( addr addr2 )
WhileCode2 swap !
ELSE
drop THEN ( addr )
level- nl S" WHILE " .struc level+
ELSE ( addr )
MyBranch cell+ @ LeaveCode = IF ( addr )
s" 0= ?LEAVE " .struc
ELSE
nl S" IF " .struc level+ THEN
THEN
THEN ( addr )
THEN ( addr )
DebugBranch cell+ ;
: c-?dup-?branch ( addr -- addr2 )
Scan? 0= IF
s" ?dup-" struct-pre $! THEN
c-?branch ;
: c-for ( -- )
Display? IF
nl S" FOR" .struc level+ THEN ;
: c-loop ( addr -- addr1 )
scan? IF
dup @ Branch! LoopCode Type! THEN
Display? IF
level- nl id.-without nl bl cemit THEN
DebugBranch cell+ Scan? IF
dup BranchAddr? BEGIN ( addr1 addr2 f )
WHILE ( addr1 addr2 )
cell+ LeaveCode swap ! dup MoreBranchAddr? REPEAT
THEN ( addr1 ) \ perverse stack effect of MoreBranchAddr?
cell+ ;
: c-do ( addr -- addr )
Display? IF
dup BranchAddr? IF ( addr addr1 )
cell+ dup @ LoopCode = IF ( addr addr2 )
Disable swap ! nl id.-without level+
ELSE
drop ." 2>r " THEN ( addr )
ELSE ( addr ) \ perverse stack effect of ?BranchAddr
." 2>r " THEN
THEN ;
: c-?do ( addr1 -- addr2 )
Display? IF
nl id.-without level+
dup cell+ BranchAddr? IF Disable swap ! THEN
THEN
DebugBranch cell+ ;
: c-exit ( addr1 -- addr2 )
dup cell- CheckEnd IF ( addr1 )
Display? IF
nlflag off S" ;" ['] Com-color .string THEN
C-Stop on
ELSE
Display? IF S" EXIT " .struc THEN
THEN
Debug? IF drop THEN ( !! unbalanced! ) ; \ !!! cross-interacts with debugger !!!
: c-abort" ( c-addr -- c-addr-end )
count 2dup + aligned -rot Display? IF ( c-addr-end c-addr1 u )
S" ABORT" .struc
'"' cemit bl cemit ['] default-color .string
'"' cemit bl cemit
ELSE
2drop THEN ;
[IFDEF] (compile)
: c-(compile) ( addr -- )
Display? IF
s" POSTPONE " ['] Com-color .string
dup @ look 0= ABORT" SEE: No valid XT"
name>string ['] default-color .string bl cemit
THEN
cell+ ;
[THEN]
[IFDEF] u#exec
Variable u#what \ global variable to specify what to search for
: search-u#gen ( 0 offset1 offset2 nt -- xt/0 offset1 offset2 flag )
dup >code-address docol: = IF
dup >body @decompile-prim u#what @ xt=
over >body 3 cells + @decompile-prim ['] ;S xt= and
IF >r 2dup r@ >body cell+ 2@ d=
IF r> -rot 2>r nip 2r> false EXIT THEN
r>
THEN
THEN drop true ;
: c-u#gen ( addr -- addr' )
display? IF
0 over 2@
[: ['] search-u#gen swap traverse-wordlist ;] map-vocs
2drop
?dup-IF
>name name>string ['] Com-color .string bl cemit
2 cells + EXIT THEN
u#what @ name>string ['] Com-color .string bl cemit
dup @ c-. cell+ dup @ c-. cell+
ELSE 2 cells + THEN ;
: c-u#exec ( addr -- addr' ) ['] u#exec u#what ! c-u#gen ;
: c-u#+ ( addr -- addr' ) ['] u#+ u#what ! c-u#gen ;
[THEN]
[IFDEF] call-c#
: c-call-c# ( addr -- addr' )
display? IF
dup @ body> name>string ['] Com-color .string bl cemit
THEN cell+ ;
[THEN]
[DEFINED] useraddr [DEFINED] up@ or [IF]
: ?type-found ( offset nt flag -- offset flag' )
IF 2dup >body @ = IF -rot nip false EXIT
THEN THEN drop true ;
: search-uservar ( offset nt -- offset flag )
( name>interpret ) dup >code-address douser: = ?type-found ;
: c-searcharg ( addr xt addr u -- addr' ) 2>r >r
display? IF
0 over @
r@ map-vocs drop
display? IF
?dup-IF name>string ['] Com-color .string bl cemit
ELSE r> 2r@ ['] Com-color .string >r
dup @ c-. bl cemit
THEN
THEN
THEN cell+ rdrop rdrop rdrop ;
: c-useraddr ( addr -- addr' )
[: ['] search-uservar swap traverse-wordlist ;]
s" useraddr " c-searcharg ;
[THEN]
[IFDEF] up@
: c-up@ ( addr -- addr' )
dup @decompile-prim ['] lit+ xt= IF
cell+ c-useraddr
ELSE
display? IF
s" up@ " ['] default-color .string
THEN
THEN ;
[THEN]
[IFDEF] user@
: search-userval ( offset nt -- offset flag )
( name>interpret ) dup >does-code ['] infile-id >does-code = ?type-found ;
: c-user@ ( addr -- addr' )
[: ['] search-userval swap traverse-wordlist ;]
s" user@ " c-searcharg ;
[THEN]
CREATE C-Table \ primitives map to code only
' lit A, ' c-lit A,
[IFDEF] does-exec ' does-exec A, ' c-callxt A, [THEN]
[IFDEF] does-xt ' does-xt A, ' c-callxt A, [THEN]
[IFDEF] extra-exec ' extra-exec A, ' c-callxt A, [THEN]
[IFDEF] extra-xt ' extra-xt A, ' c-callxt A, [THEN]
' lit@ A, ' c-lit@ A,
[IFDEF] call ' call A, ' c-call A, [THEN]
[IFDEF] call-loc ' call-loc A, ' c-call A, [THEN]
\ ' useraddr A, ....
' lit-perform A, ' c-call A,
' lit+ A, ' c-lit+ A,
\ [IFDEF] (s") ' (s") A, ' c-c" A, [THEN]
\ [IFDEF] (.") ' (.") A, ' c-c" A, [THEN]
\ [IFDEF] "lit ' "lit A, ' c-c" A, [THEN]
\ [IFDEF] (c") ' (c") A, ' c-c" A, [THEN]
' (do) A, ' c-do A,
[IFDEF] (+do) ' (+do) A, ' c-?do A, [THEN]
[IFDEF] (u+do) ' (u+do) A, ' c-?do A, [THEN]
[IFDEF] (-do) ' (-do) A, ' c-?do A, [THEN]
[IFDEF] (u-do) ' (u-do) A, ' c-?do A, [THEN]
[IFDEF] (-[do) ' (-[do) A, ' c-?do A, [THEN]
[IFDEF] (u-[do) ' (u-[do) A, ' c-?do A, [THEN]
' (?do) A, ' c-?do A,
' (for) A, ' c-for A,
' ?branch A, ' c-?branch A,
' ?dup-?branch A, ' c-?dup-?branch A,
' branch A, ' c-branch A,
' (loop) A, ' c-loop A,
' (+loop) A, ' c-loop A,
[IFDEF] (s+loop) ' (s+loop) A, ' c-loop A, [THEN]
[IFDEF] (-loop) ' (-loop) A, ' c-loop A, [THEN]
[IFDEF] (/loop) ' (/loop) A, ' c-loop A, [THEN]
' (next) A, ' c-loop A,
' ;s A, ' c-exit A,
\ [IFDEF] (abort") ' (abort") A, ' c-abort" A, [THEN]
\ only defined if compiler is loaded
\ [IFDEF] (compile) ' (compile) A, ' c-(compile) A, [THEN]
[IFDEF] u#exec ' u#exec A, ' c-u#exec A, [THEN]
[IFDEF] u#+ ' u#+ A, ' c-u#+ A, [THEN]
[IFDEF] call-c# ' call-c# A, ' c-call-c# A, [THEN]
[IFDEF] useraddr ' useraddr A, ' c-useraddr A, [THEN]
[IFDEF] user@ ' user@ A, ' c-user@ A, [THEN]
[IFDEF] up@ ' up@ A, ' c-up@ A, [THEN]
0 , here 0 ,
avariable c-extender
c-extender !
\ DOTABLE 15may93jaw
: DoTable ( ca/cfa -- flag )
C-Output @ IF
dup ['] lit xt= IF drop c>lit true EXIT THEN
THEN
c-lits
C-Table BEGIN ( cfa table-entry )
dup @ dup 0= IF
drop cell+ @ dup IF ( next table!)
dup @
ELSE ( end!)
2drop false EXIT
THEN
THEN
\ jump over to extender, if any 26jan97jaw
third swap xt= 0=
WHILE
2 cells +
REPEAT
nip cell+ perform
true
;
: BranchTo? ( a-addr -- a-addr )
Display? IF dup BranchAddr?
IF
BEGIN cell+ @ dup 20 u>
IF drop nl S" BEGIN " .struc level+
ELSE
dup Disable <>
over LeaveCode <> and
over LoopCode <> and
IF WhileCode2 =
IF nl S" THEN " .struc nl ELSE
level- nl S" THEN " .struc nl THEN
ELSE drop THEN
THEN
dup MoreBranchAddr? 0=
UNTIL
THEN
THEN ;
: analyse ( a-addr1 -- a-addr2 )
Branches @ IF BranchTo? THEN
dup cell+ swap @decompile-prim
dup >r DoTable IF rdrop EXIT THEN
r> Display?
IF
.word1 bl cemit
ELSE
drop
THEN ;
: c-init ( -- )
0 YPos ! 0 XPos !
0 Level ! nlflag off
BranchTable BranchPointer !
c-stop off
Branches on ;
: makepass ( a-addr -- )
c-stop off
BEGIN
analyse
c-stop @
UNTIL drop ;
\ user words
: seecode ( xt -- )
dup s" Code" .defname
>code-address
dup in-dictionary? \ user-defined code word?
if
dup next-head
else
dup next-prim
then
threading-method 2 = IF @ >r @ r> THEN
over - discode
." end-code" cr ;
: seeabicode ( xt -- )
dup s" ABI-Code" .defname
>body dup dup next-head
swap - discode
." end-code" cr ;
: see;abicode ( xt -- )
dup s" ;ABI-Code" .defname
>body dup dup next-head
swap - discode
." end-code" cr ;
: seevar ( xt -- )
s" Variable" .defname cr ;
: seeuser ( xt -- )
s" User" .defname cr ;
: seecon ( xt -- )
dup >body ?
s" Constant" .defname cr ;
: seevalue ( xt -- )
dup >body ?
s" Value" .defname cr ;
: seedefer ( xt -- )
dup >body @ xt-see-xt cr
dup s" Defer" .defname cr
>name ?dup-if
." IS " id. cr
else
." latestxt >body !"
then ;
:is see-threaded ( addr -- )
C-Pass @ DebugMode = IF
ScanMode c-pass !
EXIT
THEN
ScanMode c-pass ! dup makepass
DisplayMode c-pass ! makepass ;
: seedoes ( xt -- )
\ !! make it work for general xt set-does> words
dup s" create" .defname cr
s" DOES> " ['] Com-color .string XPos @ Level !
>does-code see-threaded ;
: seecol ( xt -- )
dup s" :" .defname nl
2 Level !
>body see-threaded ;
: seefield ( xt -- )
dup >body ." 0 " ? ." 0 0 "
s" Field" .defname cr ;
: seeumethod ( xt -- )
dup s" umethod" .defname cr
dup defer@ xt-see-xt cr
>name ?dup-if
." IS " id. cr
else
." latestxt >body !"
then ;
: umethod? ( xt -- flag )
>body dup @decompile-prim ['] u#exec xt= swap
3 cells + @decompile-prim ['] ;S xt= and ;
\ user visible words
set-current
: xt-see ( xt -- ) \ gforth
\G Decompile the definition represented by @i{xt}.
cr c-init
dup >does-code
if
seedoes EXIT
then
dup xtprim?
if
seecode EXIT
then
dup >code-address
CASE
docon: of seecon endof
[IFDEF] dovalue:
dovalue: of seevalue endof
[THEN]
docol: of dup umethod? IF seeumethod ELSE seecol THEN endof
[IFDEF] docolloc:
docolloc: of seecol endof
[THEN]
dovar: of seevar endof
[IFDEF] douser:
douser: of seeuser endof
[THEN]
[IFDEF] dodefer:
dodefer: of seedefer endof
[THEN]
[IFDEF] dofield:
dofield: of seefield endof
[THEN]
[IFDEF] doabicode:
doabicode: of seeabicode endof
[THEN]
[IFDEF] do;abicode:
do;abicode: of see;abicode endof
[THEN]
over of seecode endof \ direct threaded code words
over >body of seecode endof \ indirect threaded code words
2drop abort" unknown word type"
ENDCASE ;
: (xt-see-xt) ( xt -- )
xt-see cr ." latestxt" ;
' (xt-see-xt) is xt-see-xt
: (.immediate) ( xt -- )
['] execute = if
." immediate"
then ;
: (.compile-only) ( nt -- )
compile-only? IF ." compile-only" THEN ;
: name-see ( nfa -- )
dup synonym? IF
." Synonym " dup id. dup >body @ id.
ELSE
dup alias? IF