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ps.a
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1987-09-05
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1,378 lines
*
* This program is in the public domain. PostScript is a trademark
* of Adobe Systems.
* Greg Lee, July, 1987.
* U.S. mail: 562 Moore Hall, Dept. of Linguistics
* INTERNET: lee@uhccux.uhcc.hawaii.edu
* UUCP: {ihnp4,dcdwest,ucbvax}!sdcsvax!nosc!uhccux!lee
* BITNET: lee%uhccux.uhcc.hawaii.edu@rutgers.edu
*
* link with ffpa.o
xref FFPAFP
* link with lmath.o
xref lmulu
xref ldivu
xref ldivs
* link with files.o
xref readln
xref runclose
xref showreal
xref show8x
xref showdec
xref newline
xref getstr
xref msg,longmsg
xref ioinit
xref endio
* in control.o
xref initloops
xref _exec
* in graphics.o
xref initgr,endgr
* in rmath.o
xref _gsave,_grestore
* in dict.o
xref systemdict
xref fdict,enddict
xref .true,.false
xdef reinterp
xdef ihandle,ohandle
xdef rastport,wbscreen
xdef intuitionbase
xdef graphicsbase
xdef mathffpbase
xdef mathtransbase
idnt PS
section one
include "ps.h"
math macro
move.l A6,-(SP)
move.l mathffpbase,A6
jsr _LVO\1(A6)
move.l (SP)+,A6
endm
lref Open,1
lref Close,2
lref Read,3
lref Write,4
lref Input,5
lref Output,6
lref DeleteFile,8
lref IoErr,18
lref LoadSeg,21
lref UnLoadSeg,22
lref IsInteractive,32
lref SPFix,1
lref SPFlt,2
lref SPCmp,3
lref SPTst,4
lref SPAbs,5
lref SPNeg,6
lref SPAdd,7
lref SPSub,8
lref SPMul,9
lref SPDiv,10
_RTS equ %0100111001110101
_JSR equ %0100111010111001 destination abs. long
_JMP equ %0100111011111001 destination abs. long
_MOVELD0 equ %0010000000111100 source immediate long
_MOVEVD0 equ %0010000000111001 source abs. long
_MOVEWD2 equ %0011010000111100 source immediate word
_MOVEVD2 equ %0011010000111001 source abs. long
main
move.l SP,stacksave
bsr ioinit
bsr initgr
* here on error to redo stack
main1
bsr _clear
bsr dsclear
* get more stuff to interpret
main.in
bsr getstr
* (from here, A1 -> next stuff to interpret)
* interpret next symbol
main.next
bsr skipsp
beq main.in
pea main.next
move.b compilelevel,D3
* if it's a number, push it
bsr testnumber
beq pushnum
* name literal?
cmp.b #'/',D0
beq pushlit
cmp.b #'(',D0
beq pushstr
cmp.b #'{',D0
beq start_compile
cmp.b #'}',D0
beq end_compile
cmp.b #'%',D0
beq getstr
* interpret a name
bsr findsym
tst.l D2
bpl name.ok
say_undefined
print unknown
bra reinterp
name.ok
move.b compilelevel,D3
beq no.dummies
cmp.w #Dummy,D2
bne no.dummies
bsr vpush
lea _exec,A0
move.l A0,D0
bra stowcall
no.dummies
cmp.w #ICode,D2
bne vpush
tst.b D3
bne stowcall
move.l A1,-(SP)
move.l D0,A0
jsr (A0)
move.l (SP)+,A1
rts
* exit
system
bsr endgr
bsr endio
moveq #0,D0
rts
***********************
DEF clear
lea istacktop,A5
moveq #Illegal,D0
move.l D0,-(A5)
move.w D0,-(A5)
rts
countistack
moveq #-1,D0
moveq #Illegal,D2
move.l A5,A0
1$ addq.l #1,D0
move.w (A0),D1
addq.l #6,A0
cmp.w D1,D2
bne 1$
rts
DEF count
bsr countistack
RETURN Integer
index1istack
bsr popnum
addq.l #1,D0
bgt ..ndxis
bra iuflow
indexistack
bsr popnum
..ndxis
move.l D0,D3
bmi iuflow
bsr countistack
cmp.l D0,D3
bhi iuflow
move.l D3,D0
subq #1,D0
mulu #6,D0
move.l A5,A2
add.l D0,A2
rts
DEF copy
bsr indexistack
bra 2$
1$ move.w (A2)+,D2
move.l (A2),D0
bsr r.ipush
subq.l #8,A2
2$ dbra D3,1$
rts
DEF index
bsr index1istack
move.w (A2)+,D2
move.l (A2)+,D0
bra r.ipush
DEF roll
bsr popnum
move.l D0,-(SP)
bsr indexistack
move.l (SP)+,D0
subq.l #1,D3
bmi 2$
move.l D3,D4
1$ move.l D4,D3
bsr roll1
bne 1$
2$ rts
roll1
tst.l D0
beq 1$
bmi rollm
bra rollp
1$ rts
rollp
subq.l #1,D0
move.l D0,-(SP)
move.l A5,A0
move.l A5,A1
move.w (A0)+,-(SP)
move.l (A0)+,-(SP)
bra 2$
1$ move.w (A0)+,(A1)+
move.l (A0)+,(A1)+
2$ dbra D3,1$
move.l (SP)+,D0
move.w (SP)+,(A1)+
move.l D0,(A1)
move.l (SP)+,D0
rts
rollm
addq.l #1,D0
move.l D0,-(SP)
move.l A2,A1
move.l A2,A0
subq.l #6,A0
move.w (A2)+,-(SP)
move.l (A2)+,-(SP)
bra 2$
1$ move.w (A0)+,(A1)+
move.l (A0),(A1)
subq.l #8,A0
subq.l #8,A1
2$ dbra D3,1$
move.l (SP)+,D0
move.w (SP)+,(A1)+
move.l D0,(A1)
move.l (SP)+,D0
rts
dsclear
lea dstacktop,A0
move.l A0,dstack
moveq #0,D0
move.w D0,dstackcnt
lea sstacktop,A0
move.l A0,sstack
moveq #0,D0
move.w D0,sstackcnt
rts
start_compile
addq.l #1,A1
move.b compilelevel,D0
move.w D0,-(SP)
move.l nextcode,A0
move.w #ICode,D2
move.w (SP),D0
tst.b D0
beq 2$
add.l #6+4+6+6,A0 allow for push & jmp if doing sub-proc
2$ move.l A0,D0
* if doing sub-proc, this generates code to do the push
bsr ipush
move.w (SP),D0
addq.b #1,D0
move.b D0,compilelevel
move.w (SP)+,D0
tst.b D0
bne 3$
rts
3$
move.w #_JMP,D0
bsr stowword
move.l nextcode,A0
move.l A0,-(SP) where to put dest of jmp
moveq #0,D0 leave room for dest of jmp
bsr stowword
bsr stowword
bsr main.next go compile the sub-procedure
* should return to here when get matching '}'
move.l (SP)+,A0 patch in dest of jmp
move.l nextcode,(A0)
rts
end_compile
addq.l #1,A1
move.b compilelevel,D0
beq 2$ unmatched '}'
move.w D0,-(SP)
move.w #_RTS,D0
bsr stowword
move.w (SP)+,D0
subq.b #1,D0
move.b D0,compilelevel
beq 1$
addq.l #4,SP discard ret to main.next and ret to above
1$ rts
2$ print rbrace
bra reinterp
testnumber
cmp.b #'-',D0
beq ..endtestn
cmp.b #'+',D0
beq ..endtestn
cmp.b #'.',D0 (only if next is digit?)
beq ..endtestn
testdig
cmp.b #'0',D0 * is it a decimal digit?
bcs ..endtestn
cmp.b #'9',D0
bhi ..endtestn
cmp.b D0,D0
..endtestn
rts
pushstr
addq.l #1,A1
move.w #1,parenlevel
move.l farea,D0
btst #0,D0
beq 1$
bsr stowbyte
move.l farea,D0
1$
move.l D0,-(SP) place to put length
move.w #String,D2
bsr ipush
moveq #0,D0
move.w D0,-(SP) count length
bsr stowbyte room for length
bsr stowbyte
..nextsbyte
addq.w #1,(SP)
pea ..nextsbyte
move.b (A1)+,D0
bne 2$
move.b #10,D0
bsr stowbyte
bra getstr
2$ cmp.b #'(',D0
bne 3$
add.w #1,parenlevel
bra stowbyte
3$ cmp.b #')',D0
bne 4$
sub.w #1,parenlevel
bne stowbyte
addq.l #4,SP discard ret to ..nextsbyte
move.w (SP)+,D0
subq.w #1,D0 correct for ')' not stored
move.l (SP)+,A0
move.w D0,(A0)
rts
4$ cmp.b #'\',D0
bne stowbyte
move.b (A1)+,D0
beq getstr
move.b D0,D1
move.b #10,D0
cmp.b #'n',D1
beq stowbyte
move.b #13,D0
cmp.b #'r',D1
beq stowbyte
move.b #9,D0
cmp.b #'t',D1
beq stowbyte
move.b #8,D0
cmp.b #'b',D1
beq stowbyte
move.b #12,D0
cmp.b #'f',D1
beq stowbyte
cmp.b #'0',D1
bcs ..noct
cmp.b #'7',D1
bhi ..noct
moveq #0,D0
bsr ..isoct
bsr ..isoct
sub.b #'0',D1
asl.b #3,D0
add.b D1,D0
bra stowbyte
..isoct
sub.b #'0',D1
asl.b #3,D0
add.b D1,D0
move.b (A1),D1
cmp.b #'0',D1
bcs 1$
cmp.b #'7',D1
bhi 1$
addq.l #1,A1
rts
1$ addq.l #4,SP
bra stowbyte
..noct
move.b D1,D0
cmp.b #'\',D1
beq stowbyte
cmp.b #'(',D1
beq stowbyte
cmp.b #')',D1
beq stowbyte
rts
pushlit
addq.l #1,A1 past '/'
move.l farea,A0 save to push
moveq #0,D3 count
bsr stowbyte room for length
1$ move.b (A1)+,D0
bsr testendchar
bne 2$
move.b D3,(A0)
subq.l #1,A1
move.l A0,D0
move.w #Name,D2
bra ipush
2$ bsr stowbyte
addq.l #1,D3
bra 1$
pushnum
moveq #0,D1
move.l D1,D2 neg flag
move.l D1,D3 dec point flag
move.l A1,A0
cmp.b #'-',(A0)
bne 1$
move.b (A1)+,D2
1$ move.b (A1)+,D0
bsr testdig
bne 2$
sub.b #'0',D0
ext.w D0
ext.l D0
move.l D0,-(SP)
add.l D1,D1
move.l D1,D0
lsl.l #2,D1
add.l D0,D1
move.l (SP)+,D0
add.l D0,D1
bra 1$
2$ tst.b D3
beq 6$
cmp.b #'E',D0
bne realpush
3$ move.b (A1)+,D0
cmp.b #'-',D0
bne 5$
4$ move.b (A1)+,D0
5$ bsr testdig
beq 4$
bra realpush
6$ cmp.b #'E',D0
beq 3$
cmp.b #'.',D0
bne intpush
move.b D0,D3
bra 1$
realpush
subq.l #1,A1
move.l A1,-(SP)
jsr FFPAFP
move.l (SP)+,A1
bvs 1$
move.w #Real,D2
move.l D7,D0
bra ipush
1$ print fperr
bra reinterp
intpush
subq.l #1,A1
move.b D2,D3
move.w #Integer,D2
move.l D1,D0
tst.b D3
beq ipush
neg.l D0
ipush
move.b compilelevel,D3
beq r.ipush
bsr stowmovel
bsr stowmovew
..iptype
lea r.ipush,A0
move.l A0,D0
bra stowcall
vpush
tst.b D3
beq r.ipush
move.l A2,D0 get address of value
addq.l #2,D0
move.l A2,-(SP)
bsr stowmovev
move.l (SP)+,D0 get address of type
bsr stowmovevw
bra ..iptype
xdef r.ipush
r.ipush
* move.l istack,A5
move.l D0,-(A5)
move.w D2,-(A5)
cmp.l #istackbot,A5
bhi ipush.ok
print overflow
reinterp
move.b #0,compilelevel
bsr initloops
bsr runclose
move.l stacksave,SP
bra main1
ipush.ok
* move.l A5,istack
rts
xdef ipop
ipop
DEF pop
* move.l istack,A5
move.w (A5)+,D2
cmp.w #Illegal,D2
bne ..ippok
iuflow
print underflow
bra reinterp
..ippok
move.l (A5)+,D0
* move.l A5,istack
rts
xdef popnum
popnum
bsr ipop
cmp.w #Integer,D2
beq 1$
cmp.w #Real,D2
bne type_mismatch
move.l D1,-(SP)
math SPFix
move.l (SP)+,D1
move.w #Integer,D2
1$ rts
skipsp
move.b (A1),D0
beq 2$
cmp.b #10,D0
beq 1$
cmp.b #' ',D0
bne 2$
1$ addq.l #1,A1
bra skipsp
2$ rts
testendchar
tst.b D0
beq 1$
cmp.b #' ',D0
beq 1$
cmp.b #10,D0
beq 1$
cmp.b #'}',D0
beq 1$
cmp.b #'{',D0
beq 1$
cmp.b #')',D0
beq 1$
cmp.b #'(',D0
beq 1$
cmp.b #'/',D0
beq 1$
cmp.b #'%',D0
beq 1$
cmp.b #']',D0
beq 1$
cmp.b #'[',D0
beq 1$
cmp.b #'>',D0
beq 1$
cmp.b #'<',D0
1$ rts
* A1 -> name to look for
* return with A1 -> past name
* D2 = -1 if not found, else D2 = type
* D0 = value & A2 -> type of entry
findsym
move.l A1,A0
moveq #0,D3
move.l D3,D2
1$ move.b (A0)+,D0 get length in D3
bsr testendchar
beq 2$
addq.l #1,D3
bra 1$
2$ tst.l D3
bne 4$
cmp.b #'[',D0
beq 3$
cmp.b #']',D0
bne .nonefound
3$ moveq #1,D3
4$ bsr allsym
tst.l D2
bpl 5$
move.b compilelevel,D1
bne dummyentry
5$ add.l D3,A1
rts
allsym
move.w dstackcnt,D1
move.l dstack,A0
1$ subq.w #1,D1
bmi 2$
move.l (A0)+,A2
addq.l #2,A2
movem.l A0/D1,-(SP)
moveq #0,D2
bsr nextsym
movem.l (SP)+,A0/D1
tst.l D2
bmi 1$
rts
2$ moveq #0,D2
lea systemdict,A2
* also called by dictsearch
nextsym
move.l (A2)+,D0
beq .nonefound
move.l D0,A3 A3 -> name in dict
move.l A1,A0 A0 -> name
move.l D3,D1
move.w (A2)+,D2 D2 = type
move.l (A2)+,D0 D0 = value
cmp.b (A3)+,D1 same length?
bne nextsym
subq.l #1,D1
4$ cmp.b (A3)+,(A0)+
dbne D1,4$
bne nextsym
subq.l #6,A2
rts
.nonefound
moveq #-1,D2
rts
* from above -- A1 -> name; D3 = length
dummyentry
move.l A1,A0
add.l D3,A0
move.l A0,-(SP)
move.l farea,A0 save for entry name
move.l D3,D0
bsr stowbyte length
bra 2$
1$ move.b (A1)+,D0
bsr stowbyte
2$ dbra D3,1$
lea say_undefined,A1
move.l A1,D0
move.l #Dummy,D2
bsr newentry
subq.l #6,A0
move.l A0,A2
bsr vpush
lea _exec,A0
move.l #ICode,D2
move.l A0,D0
move.l (SP)+,A1
rts
DEF begin
ARG Dictionary
lea dstackcnt,A0
cmp.w #DstackSize,(A0)
beq 1$
addq.w #1,(A0)
move.l dstack,A0
move.l D0,-(A0)
move.l A0,dstack
rts
1$ print dstackov
bra reinterp
DEF end
lea dstackcnt,A0
tst.w (A0)
beq 1$
subq.w #1,(A0)
move.l dstack,A0
move.l (A0)+,D0
move.l A0,dstack
rts
1$ print dstackuv
bra reinterp
**********
stowbyte
move.l farea,A2
move.b D0,(A2)+
cmp.l #endsarea,A2
bne 1$
print areafull
bra reinterp
1$ move.l A2,farea
rts
* store instruction 'move.w <D0>,D2'
stowmovevw
move.l D0,-(SP)
move.w #_MOVEVD2,D0
bra ..stowi
* store instruction 'move.w #<D2>,D2'
stowmovew
move.w #_MOVEWD2,D0
bsr stowword
move.w D2,D0
bra stowword
* store instruction 'move.l <D0>,D0'
stowmovev
move.l D0,-(SP)
move.w #_MOVEVD0,D0
bra ..stowi
* store instruction 'move.l #<D0>,D0'
stowmovel
move.l D0,-(SP)
move.w #_MOVELD0,D0
bra ..stowi
* store instruction 'jsr <D0>'
stowcall
move.l D0,-(SP)
move.w #_JSR,D0 change to BSR?
..stowi
bsr stowword
move.l (SP),D0
swap D0
bsr stowword
move.l (SP)+,D0
stowword
move.l nextcode,A2
move.w D0,(A2)+
cmp.l #endcode,A2
bls 1$
print codefull
bra reinterp
1$ move.l A2,nextcode
rts
stowlong
swap D0
bsr stowword
swap D0
bra stowword
************************************
DEF hex
bsr ipop
bsr show8x
move.l A0,D0
RETURN Name
DEF quit
move.l stacksave,SP
bsr runclose
bra system
DEF cvs
ARG String
move.l D0,-(SP)
moveq #-1,D0 flag this is a string conversion
bra ..prnt
..cvs2
* it better be long enough
move.l (SP)+,A1
move.l A1,D0
* A0 -> name; A1 -> string
moveq #0,D1
move.b D1,(A1)+
move.b (A0),D1
1$ move.b (A0)+,(A1)+
dbra D1,1$
RETURN String
..pors
move.l (SP)+,D0
bne ..cvs2
bsr msg
bra newline
DEF print
ARG String
move.l D0,A0
moveq #0,D3
move.w (A0)+,D3
bra longmsg
DEF equalsprint
moveq #0,D0 flag this is a print
..prnt
move.l D0,-(SP)
bsr ipop
cmp.w #Integer,D2
bne 2$
bsr showdec
bra ..pors
2$ cmp.w #Name,D2
bne 3$
move.l D0,A0
bra ..pors
3$ cmp.w #String,D2
bne 4$
move.l D0,A0
move.l (SP)+,D1
beq 30$
move.l (SP)+,D1
bra r.ipush it's already a string -- should copy it?
30$
moveq #0,D3
move.w (A0)+,D3
bsr longmsg
bra newline
4$ cmp.w #Boolean,D2
bne 6$
lea .true,A0
tst.l D0
bne 5$
lea .false,A0
5$ bra ..pors
6$ cmp.w #Real,D2
bne 7$
bsr showreal
bra ..pors
7$
lea nsv,A0
bra ..pors
DEF string
bsr popnum
move.l D0,D3
swap D0
tst.w D0
bne 2$
move.l farea,D0
btst #0,D0
beq 1$
bsr stowbyte
move.l farea,D0
1$
move.l D0,A2
add.l D3,A2
addq.l #2,A2
cmp.l #endsarea,A2
bcs 3$
2$ print areafull
bra reinterp
3$ move.l D0,A0
move.w D3,(A0)
move.l A2,farea
RETURN String
DEF dict
moveq #-1,D4
bra ..arry
DEF array
moveq #0,D4
..arry
bsr popnum
move.l nextcode,A2
move.l A2,A0
move.w D0,(A2)+
add.l D0,D0 bytes -> words
move.l D0,D1
add.l D1,D0
add.l D1,D0 length * 3
tst.l D4
beq 1$
add.l D1,D0
add.l D1,D0 length * 5
addq.l #4,D0 +1 for null at end
move.l A2,A0
clr.w (A2)+ current length is 0
clr.l (A2) flag end
1$ add.l D0,A2
cmp.l #endcode,A2
bls 2$
ERR codefull
2$ move.l A2,nextcode
move.l A0,D0
tst.l D4
bne 3$
RETURN Array
3$ RETURN Dictionary
DEF fontalloc
move.l nextcode,A0
lea 12(A0),A2
cmp.l #endcode,A2
bls 1$
ERR codefull
1$ move.l A2,nextcode
rts
DEF maxlength
bsr ipop
move.l D0,A0
subq.l #2,A0
bra ..lngth
DEF length
bsr ipop
move.l D0,A0
cmp.w #String,D2
beq ..rlngth
cmp.w #Array,D2
beq ..rlngth
..lngth
cmp.w #Dictionary,D2
bne type_mismatch
..rlngth
moveq #0,D0
move.w (A0),D0
move.w #Integer,D2
bra r.ipush
arrayref
bsr popnum
move.l D0,D1 the index
bsr ipop
move.l D0,A0 base of array
moveq #0,D3
cmp.w #Array,D2
beq 1$
cmp.w #String,D2
bne type_mismatch
1$ move.w (A0)+,D3
subq.l #1,D3 length - 1 is max index
bmi 3$
cmp.l D3,D1 past end?
bhi 3$
cmp.w #Array,D2
beq 2$
add.l D1,A0 ret not equal
rts
2$ add.l D1,D1 word reference
move.l D1,D0
add.l D1,D0 times 3
add.l D1,D0
add.l D0,A0 index to element
cmp.l D0,D0
rts
3$ print arr_err
bra reinterp
DEF get
bsr arrayref
bne 1$
move.w (A0)+,D2 type
move.l (A0),D0 value
bra r.ipush
1$ move.w #Integer,D2
moveq #0,D0
move.b (A0),D0
bra r.ipush
DEF put
bsr ipop
move.l D0,-(SP)
move.w D2,-(SP)
bsr arrayref
bne 1$
move.w (SP)+,(A0)+
move.l (SP)+,(A0)
rts
1$ move.w (SP)+,D2
move.l (SP)+,D0
cmp.w #Integer,D2
bne type_mismatch
move.b D0,(A0)
rts
DEF mark
moveq #0,D0
RETURN Mark
DEF rbracket
moveq #0,D3 count array elements
1$ bsr ipop
cmp.w #Mark,D2
beq 2$
addq.l #1,D3
move.l D0,-(SP)
move.w D2,-(SP)
bra 1$
2$ move.l nextcode,D0
move.w #Array,D2
bsr r.ipush
move.l D3,D0
bsr stowword
bra 4$
3$ move.w (SP)+,D0
bsr stowword
move.l (SP)+,D0
bsr stowlong
4$ dbra D3,3$
rts
DEF def
bsr ipop
movem.l D0/D2,-(SP)
ARG Name
move.l D0,A1 first check dict to see if old symbol
move.l D0,-(SP) save for name of new entry
bsr alldictsearch
move.l (SP)+,D0
tst.l D2 found?
bmi newentry1
* replace old entry
movem.l (SP)+,D0/D2
*(perhaps change this so that when types don't match,
* make old entry nameless and create new entry, to prevent
* problem with previously compiled code)
move.w D2,(A2)+ new type
move.l D0,(A2) new value
rts
* called from findsym
newentry
movem.l D0/D2,-(SP)
move.l A0,D0
* make new entry
* type & value on stack; D0 -> name
newentry1
move.w dstackcnt,D1
bne 4$
move.l nextentry,A0
move.l D0,(A0)+
movem.l (SP)+,D0/D2
move.w D2,(A0)+
move.l D0,(A0)+
clr.l (A0)
cmp.l #enddict,A0
bhi 3$
move.l A0,nextentry
rts
3$ print fulldict
bra reinterp
4$ move.l dstack,A0
move.l (A0),A0 address of dict -> current size
move.w -(A0),D1 D1 = maxsize
addq.l #2,A0 point at current size again
cmp.w (A0),D1 if max <= current, no room
bls 3$
moveq #0,D1 form address for new entry
move.w (A0),D1
add.l D1,D1 word
move.l D1,D2 5 * new current size
add.l D1,D1
add.l D1,D1
add.l D2,D1
addq.w #1,(A0)+ new current size, & point to 1st entry
add.l D1,A0 point to new entry
tst.l (A0) if not null, imp. error
bne imp_error
move.l D0,(A0)+
movem.l (SP)+,D0/D2
move.w D2,(A0)+
move.l D0,(A0)+
clr.l (A0)
rts
alldictsearch
move.l dstack,A0
move.w dstackcnt,D3
1$ subq.w #1,D3
bmi 3$
move.l (A0)+,A2
addq.l #2,A2 past current length
movem.l D3/A0,-(SP)
bsr dictsearch
movem.l (SP)+,D3/A0
tst.l D2
* bmi 1$ (it was a mistake to search past top dictionary)
rts
3$ lea systemdict,A2
xdef dictsearch
* A1 -> Name (bstr)
* A2 -> dict
* returns D2 = -1 if not found
* else D2 = type
* D0 = value
* A2 -> type in entry
dictsearch
move.l A1,-(SP)
moveq #0,D3 len
move.l D3,D2
move.b (A1)+,D3
bsr nextsym
move.l (SP)+,A1
rts
DEF exch
bsr ipop
move.l D0,D1
move.w D2,D3
bsr ipop
exg D0,D1
exg D2,D3
bsr r.ipush
move.l D1,D0
move.w D3,D2
bra r.ipush
DEF dup
bsr ipop
bsr r.ipush
bra r.ipush
DEF true
moveq #-1,D0
RETURN Boolean
DEF false
moveq #0,D0
RETURN Boolean
DEF cvr
ARG Integer
math SPFlt
RETURN Real
DEF cvi
ARG Real
math SPFix
RETURN Integer
**************
DEF save
lea sstackcnt,A0
cmp.w #SstackSize,(A0)
beq 1$
addq.w #1,(A0)
move.l sstack,A0
move.l farea,-(A0)
move.l nextentry,-(A0)
move.l nextcode,-(A0)
move.l A0,sstack
bsr _gsave
moveq #0,D0
RETURN Save
1$ print sstkov
bra reinterp
DEF restore
ARG Save
lea sstackcnt,A0
tst.w (A0)
beq 1$
subq.w #1,(A0)
move.l sstack,A0
move.l (A0)+,nextcode
move.l (A0)+,A1
clr.l (A1)
move.l A1,nextentry
move.l (A0)+,farea
bra _grestore
1$ print sstkuv
bra reinterp
****************
imp_error
print imperr
bra reinterp
xdef type_mismatch
type_mismatch
print mismatch
bra reinterp
*****************************
section three,bss
stacksave ds.l 1
graphicsbase ds.l 1
intuitionbase ds.l 1
mathffpbase ds.l 1
mathtransbase ds.l 1
wbscreen ds.l 1
rastport ds.l 1
ohandle ds.l 1
ihandle ds.l 1
codearea ds.w CodeSize
endcode ds.w 4
istack ds.l 1
ds.b 12
istackbot ds.b 6*IstackSize
istacktop ds.l 1
dstackcnt ds.w 1
dstack ds.l 1
ds.b 8
dstackbot ds.b 4*DstackSize
dstacktop ds.l 1
sstackcnt ds.w 1
sstack ds.l 1
ds.b 12
sstackbot ds.b 12*SstackSize
sstacktop ds.l 1
fsarea ds.b SAreaSize
endsarea ds.b 2
section two,data
farea dc.l fsarea
nextentry dc.l fdict
nextcode dc.l codearea
compilelevel dc.w 0
parenlevel dc.w 0
bstr underflow,<stack underflow>
bstr overflow,<stack overflow>
bstr areafull,<string area is full>
bstr mismatch,<type mismatch>
bstr nsv,<--nostringval-->
bstr fulldict,<dictionary is full>
bstr codefull,<code area is full>
bstr unknown,<unknown symbol>
bstr rbrace,<unmatched right brace>
bstr fperr,<floating point error>
bstr arr_err,<bad array reference>
bstr dstackov,<dict stack overflow>
bstr dstackuv,<dict stack underflow>
bstr imperr,<implementation error>
bstr sstkov,<save stack overflow>
bstr sstkuv,<save stack underflow>
end