(FILECREATED "24-JUL-83 16:29:27" {PHYLUM}<LISPCORE>SOURCES>ASTACK.;8 61366Q
changes to: (FNS RESET)
previous date: "13-FEB-83 14:33:09" {PHYLUM}<LISPCORE>SOURCES>ASTACK.;7)
(* Copyright (c) 1982, 1983 by Xerox Corporation)
(PRETTYCOMPRINT ASTACKCOMS)
(RPAQQ ASTACKCOMS [(* ARG AND SETARG, UNUSUAL CASES)
(FNS ARG SETARG \ARG \ARGPTR \SETARG)
(FNS \RETURN)
(FNS \STACKARGPTR)
(* USER LEVEL STACK MANAGEMENT)
(FNS STKNTH STKNTHNAME STKNAME SETSTKNAME \COPYFNHEADER)
(FNS STKPOS STKSCAN SETCLINK RETFROM RETTO RESUME \RESUME RESET ERROR!)
(FNS STKARG SETSTKARG STKARGNAME SETSTKARGNAME STKNARGS FRAMESCAN \INTERPFRAMENT
\FRAMESCAN \VAROFFSET)
(LOCALVARS . T)
(DECLARE: DONTEVAL@LOAD DOEVAL@COMPILE DONTCOPY COMPILERVARS
(ADDVARS (NLAMA)
(NLAML SETARG ARG)
(LAMA])
(* ARG AND SETARG, UNUSUAL CASES)
(DEFINEQ
(ARG
[NLAMBDA (VAR M) (* lmm "24-JUL-81 07:43")
(GETBASEPTR \STACKSPACE (\ARGPTR VAR (\EVAL M])
(SETARG
[NLAMBDA (VAR M X) (* lmm "24-JUL-81 07:43")
(PUTBASEPTR \STACKSPACE (\ARGPTR VAR (\EVAL M))
(\EVAL X])
(\ARG
[LAMBDA (VAR M) (* lmm "24-JUL-81 07:43")
(* Version of ARG which doesn't EVAL 2nd argument)
(GETBASEPTR \STACKSPACE (\ARGPTR VAR M])
(\ARGPTR
[LAMBDA (VAR N) (* lmm "13-FEB-83 14:17")
(* * Returns a pointer to the basic frame corresponding to the lambda* variable VAR, and tests that N is a legal
arg#)
(PROG ((FRAME (\MYALINK))
(A (\ATOMVALINDEX VAR))
(INTERPDEF (fetch (LITATOM DEFPOINTER) of (QUOTE \INTERPRETER)))
BFLINK P DEF NARGS)
LP (COND
((fetch (FX INVALIDP) of FRAME)
(* No frame found)
(LISPERROR "ILLEGAL ARG" VAR)))
(COND
((EQ (SETQ DEF (fetch (FX FNHEADER) of FRAME))
INTERPDEF) (* See if this is \INTERPRETER running a LAMBDA*)
(OR [AND (SETQ P (\VAROFFSET FRAME A))
(EQ P (IPLUS (fetch (BF IVAR) of (SETQ BFLINK (fetch (FX BLINK) of FRAME)))
(UNFOLD (SETQ NARGS (SUB1 (fetch (BF NARGS) of BFLINK)))
WORDSPERCELL]
(GO NXT)))
[(AND (EQ (fetch (FNHEADER NA) of DEF)
-1)
(SETQ P (\VAROFFSET FRAME A))
(EQ P (fetch (FX FIRSTPVAR) of FRAME)))
(SETQ NARGS (fetch (BF NARGS) of (SETQ BFLINK (fetch (FX BLINK) of FRAME]
(T (GO NXT))) (* Found the variable as the first PROG variable of a LSTARP frame)
[RETURN (COND
((AND (IGREATERP N 0)
(NOT (IGREATERP N NARGS)))
(IPLUS (fetch (BF IVAR) of BFLINK)
(UNFOLD (SUB1 N)
WORDSPERCELL)))
(T (LISPERROR "ILLEGAL ARG" N]
NXT (SETQ FRAME (fetch (FX ALINK) of FRAME))
(GO LP])
(\SETARG
[LAMBDA (VAR M X) (* lmm "24-JUL-81 07:43")
(* VERSION OF SETARG WHICH DOESN'T EVAL 2ND AND 3RD ARGUMENTS.)
(PUTBASEPTR \STACKSPACE (\ARGPTR VAR M)
X])
)
(DEFINEQ
(\RETURN
[LAMBDA (X) (* lmm " 6-OCT-81 23:28")
(DECLARE (LOCALVARS . T)) (* for use by the LLBREAK package)
(RAID X)
(PROG1 X (\SMASHLINK NIL (SETQ X (fetch (FX CLINK) of (\MYALINK)))
X])
)
(DEFINEQ
(\STACKARGPTR
[LAMBDA (POS) (* lmm " 2-NOV-81 20:25")
(* return the index of the frame extension corresponding to POS or cause
appropriate error)
(COND
[(STACKP POS) (* if POS is STACKP, it is merely the contents)
(COND
((ZEROP (fetch EDFXP of POS))
(LISPERROR "STACK PTR HAS BEEN RELEASED" POS))
(T (fetch EDFXP of POS]
(T (PROG ((FX (\MYALINK))
(P POS))
[COND
((NULL POS) (* those functions which allow NIL should explicitly check for it.)
(LISPERROR "ILLEGAL STACK ARG" POS))
[(EQ POS T) (* scan up for top frame. This could possibly be a constant, although there might
be some circumstances where it could move)
(PROG NIL
TOPLP
(COND
([NOT (fetch (FX INVALIDP) of (SETQ P (fetch (FX CLINK) of FX]
(SETQ FX P)
(GO TOPLP]
[(NUMBERP POS)
(COND
((ZEROP (SETQ P (FIX POS)))
(SETQ P 1)))
(COND
[(IGREATERP P 0)
(PROG NIL
ALP (COND
((EQ (SETQ FX (fetch (FX ALINK) of FX))
0)
(LISPERROR "ILLEGAL STACK ARG" POS))
((NEQ (SETQ P (SUB1 P))
0)
(GO ALP]
(T (PROG NIL
(SETQ P (IMINUS P))
CLP (COND
((EQ (SETQ FX (fetch (FX CLINK) of FX))
0)
(LISPERROR "ILLEGAL STACK ARG" POS))
((NEQ (SETQ P (SUB1 P))
0)
(GO CLP]
(T (* implicit STKPOS searching for a given name)
(PROG NIL
SCNLP
(COND
((ZEROP (SETQ FX (fetch (FX CLINK) of FX)))
(LISPERROR "ILLEGAL STACK ARG" POS))
((NOT (EQMEMB (fetch (FX FRAMENAME) of FX)
POS))
(GO SCNLP]
(COND
((IGEQ (fetch (FX USECNT) of FX)
\MAXSAFEUSECOUNT)
(LISPERROR "ILLEGAL STACK ARG" POS)))
(RETURN FX])
)
(* USER LEVEL STACK MANAGEMENT)
(DEFINEQ
(STKNTH
[LAMBDA (N IPOS OPOS) (* lmm " 6-OCT-81 23:30")
(PROG ((I (OR N -1))
CFLAG FRAME)
[COND
((IGREATERP 0 I)
(SETQ CFLAG T)
(SETQ I (IDIFFERENCE 0 I]
[SETQ FRAME (COND
(IPOS (\STACKARGPTR IPOS))
((ZEROP I)
(LISPERROR "ILLEGAL STACK ARG" N))
(T (add I -1)
(\MYALINK]
LP [COND
((ZEROP FRAME)
(RELSTK OPOS)
(RETURN))
((ZEROP I)
(RETURN (\MAKESTACKP OPOS FRAME)))
(CFLAG (SETQ FRAME (fetch (FX CLINK) of FRAME)))
(T (SETQ FRAME (fetch (FX ALINK) of FRAME]
(SETQ I (SUB1 I))
(GO LP])
(STKNTHNAME
[LAMBDA (N POS) (* lmm "12-OCT-81 20:49")
(PROG ((I (OR N -1))
CFLAG FRAME)
[COND
((IGREATERP 0 I)
(SETQ CFLAG T)
(SETQ I (IDIFFERENCE 0 I]
[SETQ FRAME (COND
(POS (\STACKARGPTR POS))
((ZEROP I)
(LISPERROR "ILLEGAL STACK ARG" N))
(T (add I -1)
(\MYALINK]
LP [COND
((fetch (FX INVALIDP) of FRAME)
(RETURN))
((ZEROP I)
(RETURN (fetch (FX FRAMENAME) of FRAME)))
(CFLAG (SETQ FRAME (fetch (FX CLINK) of FRAME)))
(T (SETQ FRAME (fetch (FX ALINK) of FRAME]
(SETQ I (SUB1 I))
(GO LP])
(STKNAME
[LAMBDA (POS) (* lmm " 6-OCT-81 23:32")
(fetch (FX FRAMENAME) of (\STACKARGPTR POS])
(SETSTKNAME
[LAMBDA (POS NAME) (* bvm: " 7-MAY-82 22:45")
(PROG ((FRAME (\STACKARGPTR POS))
FNH)
[COND
[(fetch (FX VALIDNAMETABLE) of FRAME) (* There is already a copied nametable here, just smash
it)
(SETQ FNH (fetch (FX NAMETABLE#) of FRAME))
(COND
((EQ (\HILOC FNH)
\STACKHI) (* Don't refcnt on the stack)
(replace (FNHEADER #FRAMENAME) of FNH with NAME))
(T (replace (FNHEADER FRAMENAME) of FNH with NAME]
(T (SETQ FNH (\COPYFNHEADER (fetch (FX FNHEADER) of FRAME)))
(replace (FNHEADER FRAMENAME) of FNH with NAME)
(UNINTERRUPTABLY
(replace (FX NAMETABLE) of FRAME with FNH))]
(RETURN NAME])
(\COPYFNHEADER
[LAMBDA (FNHD) (* bvm: "19-NOV-81 12:15")
(PROG ((HEADWORDS (UNFOLD (fetch (FNHEADER NTSIZE) of FNHD)
2))
NEWFNHD)
[SETQ HEADWORDS (IPLUS (fetch (FNHEADER OVERHEADWORDS) of T)
(COND
((ZEROP HEADWORDS) (* No name table, but still need to copy quad of zeros)
WORDSPERQUAD)
(T HEADWORDS]
(SETQ NEWFNHD (\ALLOCBLOCK (FOLDHI HEADWORDS WORDSPERCELL)
NIL HEADWORDS))
(\MOVEWORDS FNHD 0 NEWFNHD 0 HEADWORDS)
(RETURN NEWFNHD])
)
(DEFINEQ
(STKPOS
[LAMBDA (FRAMENAME N IPOS OPOS)
(* lmm " 2-NOV-81 20:25")
(PROG (FLAG [FX (COND
((NULL IPOS)
(\MYALINK))
(T (\STACKARGPTR IPOS]
(I (OR N -1)))
[COND
((IGREATERP 0 I)
(SETQ FLAG (SETQ I (IDIFFERENCE 0 I]
LP [COND
((EQ (fetch (FX FRAMENAME) of FX)
FRAMENAME)
(COND
((ILEQ (SETQ I (SUB1 I))
0)
(RETURN (\MAKESTACKP OPOS FX]
(COND
([fetch (FX INVALIDP) of (SETQ FX (COND
(FLAG (fetch (FX CLINK) of FX))
(T (fetch (FX ALINK) of FX]
(RELSTK OPOS)
(RETURN)))
(GO LP])
(STKSCAN
[LAMBDA (VAR IPOS OPOS) (* lmm "13-FEB-83 14:15")
(AND (LITATOM VAR)
(PROG ([FX (COND
((NULL IPOS)
(\MYALINK))
(T (\STACKARGPTR IPOS]
(A (\ATOMVALINDEX VAR)))
LP (COND
((\FRAMESCAN FX A)
(RETURN (\MAKESTACKP OPOS FX)))
((fetch (FX INVALIDP) of (SETQ FX (fetch (FX ALINK) of FX)))
(RELSTK OPOS)
(RETURN))
(T (GO LP])
(SETCLINK
[LAMBDA (FRAME NEWLINK RELEASEFLG)
(* lmm " 6-OCT-81 23:34")
(PROG (PX (FX (\STACKARGPTR FRAME))
(NX (\STACKARGPTR NEWLINK)))
(SETQ PX NX)
LP (COND
((EQ PX FX) (* Circular stack would result)
(RETURN NIL))
((fetch (FX INVALIDP) of PX)
(* Got to the top first. We're safe)
(GO OUT)))
(SETQ PX (fetch (FX CLINK) of PX))
(GO LP)
OUT (\SMASHLINK FX NIL NX)
(COND
(RELEASEFLG (RELSTK NEWLINK)))
(RETURN FRAME])
(RETFROM
[LAMBDA (POS VAL FLG) (* lmm " 6-OCT-81 23:35")
(PROG ((P (\STACKARGPTR POS)))
(COND
((ZEROP (SETQ P (fetch (FX CLINK) of P)))
(* Illegal return)
(LISPERROR 3 VAL)))
(\SMASHLINK NIL P P)
(AND FLG (RELSTK POS))
(RETURN VAL])
(RETTO
[LAMBDA (POS VAL FLG) (* lmm "24-AUG-80 16:05")
(PROG ((P (\STACKARGPTR POS)))
(\SMASHLINK NIL P P)
(AND FLG (RELSTK POS))
(RETURN VAL])
(RESUME
[LAMBDA (FROMPTR TOPTR VAL) (* lmm " 6-OCT-81 23:35")
(* FROMPTR is a stkptr which is smashed to contain a pointer to the caller of RESUME. Control is transfered to the
frame specified by TOPTR, releasing that stack pointer. A call to this RESUME returns VAL as the value of the RESUME
specified by TOPTR.)
(PROG [[FROMFX (fetch EDFXP of (\DTEST FROMPTR (QUOTE STACKP]
(TOFX (fetch EDFXP of (\DTEST TOPTR (QUOTE STACKP]
(COND
((fetch (FX INVALIDP) of TOFX)
(LISPERROR "STACK PTR HAS BEEN RELEASED" TOPTR)))
(UNINTERRUPTABLY
(COND
((NOT (fetch (FX INVALIDP) of FROMFX))
(* Release FROMPTR if it hasn't been yet)
(\DECUSECOUNT FROMFX)))
(replace EDFXP of FROMPTR with (\MYALINK))
(replace EDFXP of TOPTR with 0)
(\RESUME TOFX)))
VAL])
(\RESUME
[LAMBDA (FRAME) (* lmm " 6-OCT-81 23:36")
(replace (FX ALINK) of (\MYALINK) with FRAME)
(replace (FX CLINK) of (\MYALINK) with FRAME])
(RESET
[LAMBDA NIL (* bvm: "24-JUL-83 16:28")
(PROG ((FX (\MYALINK)))
LP [COND
((SELECTQ (fetch (FX FRAMENAME) of FX)
((T \MAKE.PROCESS0 \REPEATEDLYEVALQT)
T)
NIL)
(* In process world, try to return to top level exec frame (\REPEATEDLYEVALQT), or to the top of the process,
which will decide whether to restart or kill the process. In non-process world, we eventually return to the T
frame)
(\SMASHLINK NIL FX FX)
(RETURN \PROC.RESETME))
((fetch (FX INVALIDP) of (SETQ FX (fetch (FX CLINK) of FX)))
(RETURN (printout PROMPTWINDOW .TAB0 0 "Can't find top of stack!!!"]
(GO LP])
(ERROR!
[LAMBDA NIL (* lmm " 6-OCT-81 23:36")
(PROG ((FX (\MYALINK))
NFX)
LP (COND
((EQ (fetch (FX FRAMENAME) of FX)
(QUOTE ERRORSET))
(\SMASHLINK NIL (fetch (FX CLINK) of FX)
(fetch (FX ALINK) of FX))
(RETURN))
([NOT (fetch (FX INVALIDP) of (SETQ NFX (fetch (FX CLINK) of FX]
(SETQ FX NFX)
(GO LP))
(T (* return to top)
(\SMASHLINK NIL FX FX)
(RETURN])
)
(DEFINEQ
(STKARG
[LAMBDA (N POS DEFAULT) (* lmm "13-FEB-83 14:17")
(PROG ((FRAME (\STACKARGPTR POS))
(INDEX N)
BLINK NARGS NT NTSIZE)
(SETQ NT (\INTERPFRAMENT FRAME))
[COND
((LITATOM N)
(SETQ INDEX (OR (\FRAMESCAN FRAME (\ATOMVALINDEX N)
NT)
(LISPERROR "ILLEGAL STACK ARG" N]
(COND
((ILESSP INDEX 1)
(LISPERROR "ILLEGAL STACK ARG" INDEX))
[NT (* Interpreter frame)
(COND
([OR (IGEQ INDEX (SETQ NTSIZE (fetch (FNHEADER NTSIZE) of NT)))
(ZEROP (GETBASE NT (IPLUS (fetch (FNHEADER OVERHEADWORDS) of T)
INDEX -1]
(* Out of range)
(LISPERROR "ILLEGAL STACK ARG" INDEX))
(T (SETQ INDEX (IPLUS (SELECTC [fetch (NAMETABLESLOT VARTYPE)
of (SETQ NT (ADDBASE NT
(IPLUS NTSIZE
(fetch (FNHEADER
OVERHEADWORDS)
of T)
INDEX -1]
(\NT.IVAR (fetch (BF IVAR)
of (fetch (FX BLINK) of FRAME)))
(\NT.PVAR (fetch FIRSTPVAR of FRAME))
(SHOULDNT))
(UNFOLD (fetch (NAMETABLESLOT VAROFFSET) of NT)
WORDSPERCELL]
[[ILEQ INDEX (SETQ NARGS (fetch (BF NARGS) of (SETQ BLINK (fetch (FX BLINK) of FRAME]
(SETQ INDEX (IPLUS (fetch (BF IVAR) of BLINK)
(UNFOLD (SUB1 INDEX)
WORDSPERCELL]
[(ILEQ (SETQ INDEX (IDIFFERENCE INDEX NARGS))
(fetch (FX FNHEADER NLOCALS) of FRAME))
(SETQ INDEX (IPLUS (fetch (FX FIRSTPVAR) of FRAME)
(UNFOLD (SUB1 INDEX)
WORDSPERCELL]
(T (LISPERROR "ILLEGAL STACK ARG" N)))
(RETURN (COND
((NOT (fetch (PVARSLOT BOUND) of (STACKADDBASE INDEX)))
DEFAULT)
(T (STACKGETBASEPTR INDEX])
(SETSTKARG
[LAMBDA (N POS VAL) (* lmm "13-FEB-83 14:17")
(PROG ((FRAME (\STACKARGPTR POS))
(INDEX N)
BLINK NARGS NT NTSIZE)
(SETQ NT (\INTERPFRAMENT FRAME))
[COND
((LITATOM N)
(SETQ INDEX (OR (\FRAMESCAN FRAME (\ATOMVALINDEX N)
NT)
(LISPERROR "ILLEGAL STACK ARG" N]
[SETQ INDEX (COND
((ILESSP INDEX 1)
(LISPERROR "ILLEGAL STACK ARG" INDEX))
[NT (* Interpreter frame)
(COND
([OR (IGEQ INDEX (SETQ NTSIZE (fetch (FNHEADER NTSIZE) of NT)))
(ZEROP (GETBASE NT (IPLUS (fetch (FNHEADER OVERHEADWORDS) of T)
INDEX -1]
(* Out of range)
(LISPERROR "ILLEGAL STACK ARG" INDEX))
(T (IPLUS (SELECTC [fetch (NAMETABLESLOT VARTYPE)
of (SETQ NT (ADDBASE NT (IPLUS NTSIZE (fetch (FNHEADER
OVERHEADWORDS)
of T)
INDEX -1]
(\NT.IVAR (fetch (BF IVAR) of (fetch (FX BLINK) of FRAME)))
(\NT.PVAR (fetch FIRSTPVAR of FRAME))
(SHOULDNT))
(UNFOLD (fetch (NAMETABLESLOT VAROFFSET) of NT)
WORDSPERCELL]
([ILEQ INDEX (SETQ NARGS (fetch (BF NARGS) of (SETQ BLINK (fetch (FX BLINK)
of FRAME]
(IPLUS (fetch (BF IVAR) of BLINK)
(UNFOLD (SUB1 INDEX)
WORDSPERCELL)))
((ILEQ (SETQ INDEX (IDIFFERENCE INDEX NARGS))
(fetch (FX FNHEADER NLOCALS) of FRAME))
(IPLUS (fetch (FX FIRSTPVAR) of FRAME)
(UNFOLD (SUB1 INDEX)
WORDSPERCELL)))
(T (LISPERROR "ILLEGAL STACK ARG" N]
(RETURN (COND
((fetch (PVARSLOT BOUND) of (STACKADDBASE INDEX))
(STACKPUTBASEPTR INDEX VAL))
(T (LISPERROR "ILLEGAL STACK ARG" N])
(STKARGNAME
[LAMBDA (N POS) (* lmm "13-FEB-83 14:16")
(PROG ((FRAME (\STACKARGPTR POS))
NT NM (NTENTRY N)
NARGS)
(SETQ NT (\INTERPFRAMENT FRAME))
[COND
((LITATOM NTENTRY)
(SETQ NTENTRY (\FRAMESCAN FRAME (\ATOMVALINDEX NTENTRY)
NT]
[COND
(NT (* Interpreted frame)
(RETURN (OR [AND (IGREATERP NTENTRY 0)
(ILESSP NTENTRY (fetch (FNHEADER NTSIZE) of NT))
(\INDEXATOMVAL (\GETBASE NT (IPLUS (fetch (FNHEADER OVERHEADWORDS)
of T)
NTENTRY -1]
(LISPERROR "ILLEGAL STACK ARG" N]
(SETQ NT (fetch (FX NAMETABLE) of FRAME))
[SETQ NTENTRY (COND
((ILEQ NTENTRY 0)
(LISPERROR "ILLEGAL STACK ARG" N))
([ILEQ NTENTRY (SETQ NARGS (fetch (BF NARGS) of (fetch (FX BLINK) of FRAME]
(LOGOR (SUB1 NTENTRY)
IVARCODE))
((ILEQ (SETQ NTENTRY (IDIFFERENCE NTENTRY NARGS))
(fetch (FNHEADER NLOCALS) of NT))
(COND
([NOT (fetch (PVARSLOT BOUND) of (STACKADDBASE (IPLUS (fetch (FX FIRSTPVAR)
of FRAME)
(UNFOLD (SUB1 NTENTRY)
WORDSPERCELL]
(RETURN)))
(LOGOR (SUB1 NTENTRY)
PVARCODE))
(T (LISPERROR "ILLEGAL STACK ARG" N]
(RETURN (for NT1 from (fetch (FNHEADER OVERHEADWORDS) of T) as NT2
from (IPLUS (fetch (FNHEADER OVERHEADWORDS) of NT)
(fetch (FNHEADER NTSIZE) of NT))
until (ZEROP (SETQ NM (GETBASE NT NT1))) do (COND
((EQ NTENTRY (GETBASE NT NT2))
(RETURN (\INDEXATOMVAL NM])
(SETSTKARGNAME
[LAMBDA (N POS NAME) (* lmm "13-FEB-83 14:17")
(PROG ((FRAME (\STACKARGPTR POS))
NT NM (NTENTRY N)
NARGS)
(SETQ NT (\INTERPFRAMENT FRAME))
[COND
((LITATOM NTENTRY)
(SETQ NTENTRY (\FRAMESCAN FRAME (\ATOMVALINDEX NTENTRY)
NT]
[COND
(NT (* Interpreted frame)
(RETURN (OR [AND (IGREATERP NTENTRY 0)
(ILESSP NTENTRY (fetch (FNHEADER NTSIZE) of NT))
(\INDEXATOMVAL (\GETBASE NT (IPLUS (fetch (FNHEADER OVERHEADWORDS)
of T)
NTENTRY -1]
(LISPERROR "ILLEGAL STACK ARG" N]
(SETQ NT (\COPYFNHEADER (fetch (FX NAMETABLE) of FRAME)))
(* Need to copy nametable in order to smash the var name)
[SETQ NTENTRY (COND
((ILEQ NTENTRY 0)
(LISPERROR "ILLEGAL STACK ARG" N))
([ILEQ NTENTRY (SETQ NARGS (fetch (BF NARGS) of (fetch (FX BLINK) of FRAME]
(IPLUS (SUB1 NTENTRY)
IVARCODE))
((ILEQ (SETQ NTENTRY (IDIFFERENCE NTENTRY NARGS))
(fetch (FNHEADER NLOCALS) of NT))
(IPLUS (SUB1 NTENTRY)
PVARCODE))
(T (LISPERROR "ILLEGAL STACK ARG" N]
(for NT1 from (fetch (FNHEADER OVERHEADWORDS) of T) as NT2
from (IPLUS (fetch (FNHEADER OVERHEADWORDS) of T)
(fetch (FNHEADER NTSIZE) of NT))
until (ZEROP (SETQ NM (GETBASE NT NT1))) do (COND
((EQ NTENTRY (GETBASE NT NT2))
(PUTBASE NT NT1 (\ATOMVALINDEX NAME))
(UNINTERRUPTABLY
(replace (FX NAMETABLE)
of FRAME with NT))
(RETURN NAME])
(STKNARGS
[LAMBDA (POS INCLUDEPVARS) (* lmm " 6-OCT-81 23:37")
(PROG ((FRAME (\STACKARGPTR POS))
NA INTERPNT)
(RETURN (COND
((SETQ INTERPNT (\INTERPFRAMENT FRAME))
(SETQ NA (fetch (FNHEADER NTSIZE) of INTERPNT))
(* Return number of vars in nt. Padded with up to 4 zeros at end, so have to
check)
[COND
((IGREATERP NA 0)
(do (add NA -1) repeatwhile (ZEROP (GETBASE INTERPNT
(IPLUS (fetch (FNHEADER
OVERHEADWORDS)
of T)
NA -1]
NA)
(T (SETQ NA (fetch (BF NARGS) of (fetch (FX BLINK) of FRAME)))
(RETURN (COND
(INCLUDEPVARS (IPLUS NA (fetch (FX FNHEADER NLOCALS) of FRAME)))
(T NA])
(FRAMESCAN
[LAMBDA (ATOM POS) (* lmm "13-FEB-83 14:17")
(PROG ((FX (\STACKARGPTR POS)))
(RETURN (\FRAMESCAN FX (COND
((LITATOM ATOM)
(\ATOMVALINDEX ATOM))
(T (RETURN NIL)))
(\INTERPFRAMENT FX])
(\INTERPFRAMENT
[LAMBDA (FX) (* bvm: " 2-OCT-81 23:32")
(* If FX is an interpreter frame
(nametable is on stack), returns its nametable)
(AND (fetch (FX VALIDNAMETABLE) of FX)
(EQ (fetch (FX NAMETABHI) of FX)
\STACKHI)
(fetch (FX NAMETABLE#) of FX])
(\FRAMESCAN
[LAMBDA (FRAME ATOM# INTERPNT) (* bvm: " 2-OCT-81 23:36")
(* * Returns index of binding of atom number ATOM# in FRAME. Indices of ivars start at 1, of pvars at nargs+1.
If INTERPNT is given, this is an interpreter frame, and we merely return index of atom in its nametable,
regardless of type)
(for OFFSET from (fetch (FNHEADER OVERHEADWORDS) of T) bind (NT ←(OR INTERPNT
(fetch (FX NAMETABLE)
of FRAME)))
TMP NAME
until (ZEROP (SETQ NAME (GETBASE NT OFFSET)))
do (COND
((EQ NAME ATOM#) (* Found ATOM# in nametable. Now look in second half of
table to see what kind of binding and where it lies)
(COND
[INTERPNT (RETURN (ADD1 (IDIFFERENCE OFFSET (fetch (FNHEADER OVERHEADWORDS)
of T]
(T (SELECTC (LOGAND [SETQ TMP (GETBASE NT (IPLUS OFFSET (fetch (FNHEADER NTSIZE)
of NT]
VARCODEMASK)
[IVARCODE (RETURN (ADD1 (IDIFFERENCE TMP IVARCODE]
[PVARCODE (AND [fetch (PVARSLOT BOUND)
of (ADDSTACKBASE (IPLUS (fetch (FX FIRSTPVAR)
of FRAME)
(UNFOLD (SETQ TMP
(IDIFFERENCE TMP
PVARCODE))
WORDSPERCELL]
(RETURN (IPLUS TMP (fetch (BF NARGS) of (fetch (FX BLINK)
of FRAME))
1]
(FVARCODE (RETURN))
(RAID])
(\VAROFFSET
[LAMBDA (FRAME ATN) (* lmm "13-OCT-81 15:56")
(* * Returns stack offset to binding of atom number ATN in FRAME, or NIL if it is not bound here.)
(for OFFSET from (fetch (FNHEADER OVERHEADWORDS) of T) bind (NT ←(fetch (FX NAMETABLE)
of FRAME))
TMP NAME
until (ZEROP (SETQ NAME (GETBASE NT OFFSET)))
do (COND
((EQ NAME ATN) (* Found ATN in nametable. Now look in second half of
table to see what kind of binding and where it lies)
(SELECTC (LOGAND [SETQ TMP (GETBASE NT (IPLUS OFFSET (fetch (FNHEADER NTSIZE)
of NT]
VARCODEMASK)
[IVARCODE (RETURN (IPLUS (fetch (BF IVAR) of (fetch (FX BLINK) of FRAME))
(UNFOLD (IDIFFERENCE TMP IVARCODE)
WORDSPERCELL]
(PVARCODE (AND [fetch (PVARSLOT BOUND)
of (ADDSTACKBASE (SETQ TMP (IPLUS (fetch (FX FIRSTPVAR)
of FRAME)
(UNFOLD (IDIFFERENCE
TMP PVARCODE)
WORDSPERCELL]
(RETURN TMP)))
(FVARCODE (RETURN))
(RAID])
)
(DECLARE: DOEVAL@COMPILE DONTCOPY
(LOCALVARS . T)
)
(DECLARE: DONTEVAL@LOAD DOEVAL@COMPILE DONTCOPY COMPILERVARS
(ADDTOVAR NLAMA )
(ADDTOVAR NLAML SETARG ARG)
(ADDTOVAR LAMA )
)
(PUTPROPS ASTACK COPYRIGHT ("Xerox Corporation" 3676Q 3677Q))
(DECLARE: DONTCOPY
(FILEMAP (NIL (1615Q 6264Q (ARG 1627Q . 2030Q) (SETARG 2032Q . 2253Q) (\ARG 2255Q . 2602Q) (\ARGPTR
2604Q . 5706Q) (\SETARG 5710Q . 6262Q)) (6265Q 6700Q (\RETURN 6277Q . 6676Q)) (6701Q 12623Q (
\STACKARGPTR 6713Q . 12621Q)) (12674Q 20601Q (STKNTH 12706Q . 14142Q) (STKNTHNAME 14144Q . 15425Q) (
STKNAME 15427Q . 15641Q) (SETSTKNAME 15643Q . 17440Q) (\COPYFNHEADER 17442Q . 20577Q)) (20602Q 32110Q
(STKPOS 20614Q . 22070Q) (STKSCAN 22072Q . 22741Q) (SETCLINK 22743Q . 24144Q) (RETFROM 24146Q . 24716Q
) (RETTO 24720Q . 25232Q) (RESUME 25234Q . 27147Q) (\RESUME 27151Q . 27463Q) (RESET 27465Q . 31062Q) (
ERROR! 31064Q . 32106Q)) (32111Q 60737Q (STKARG 32123Q . 35672Q) (SETSTKARG 35674Q . 41464Q) (
STKARGNAME 41466Q . 44740Q) (SETSTKARGNAME 44742Q . 50365Q) (STKNARGS 50367Q . 52076Q) (FRAMESCAN
52100Q . 52512Q) (\INTERPFRAMENT 52514Q . 53365Q) (\FRAMESCAN 53367Q . 56375Q) (\VAROFFSET 56377Q .
60735Q)))))
STOP