DIRECTORY
AMBridge USING
[ContextPC, FHFromTV, GetWorld, GFHFromTV, IsRemote, OctalRead, RemoteFHFromTV, RemoteGFHFromTV, SetTVFromLI, TVForPointerReferent, TVForReferent, TVForRemotePointerReferent, TVToCardinal, TVToInteger, TVToLC, TVToLI, TVToReal, TVToWordSequence, WordSequence],
AMEvents USING [Debugging, Debugged],
AMTypes USING 
[Apply, Argument, Class, Coerce, Copy, Domain, EnclosingBody, Error, ErrorReason, First, GlobalParent, Globals, GroundStar, Index, IndexToName, IndexToTV, IndexToType, IsAtom, IsComputed, IsNil, IsOverlaid, IsRefAny, IsRope, Last, Length, Locals, NComponents, Next, Procedure,Range, Referent, Result, Signal, StaticParent, Tag, TVSize, TVToName, TVToType, TVType, TypeClass, UnderClass, UnderType, Variant],
CIFS USING [Error],
Convert USING [MapValue, ValueToRope], 
PageFault USING [AddressFault],
PrintTV USING [Interceptor, PrintType, PutClosure, PutProc],
Rope USING [Cat, Concat, Fetch, Map, ROPE, Size],
RTBasic USING [nullType, TV, Type, TypedVariable], 
RTTypesBasic USING [GetCanonicalType, EquivalentTypes, InvalidType], 
Runtime USING
[BoundsFault, CallDebugger, ControlFault, DivideCheck, PointerFault, StartFault, StackError, UnboundProcedure, ZeroDivisor],
Space USING [InsufficientSpace], WorldVM USING
[Address, AddressFault, BadWorld,  CurrentIncarnation, LocalWorld, Long, Read, World],
WriteFault USING [WriteProtectFault]
;


PrintTVImpl: CEDAR MONITOR

IMPORTS
AMBridge, AMEvents, AMTypes, CIFS, Convert, PageFault, PrintTV, Rope, RTTypesBasic, Runtime, Space, WorldVM, WriteFault

EXPORTS PrintTV

= BEGIN OPEN PrintTV, Rope, RTBasic, AMBridge, AMTypes, WorldVM;
CR: CHAR = '\n; 
needInit: BOOL _ TRUE; 
UnderBoolean: Type _ CODE[BOOL]; 
UnderString: Type _ CODE[STRING]; 
UnderLongString: Type _ CODE[LONG STRING];
UnderRefText: Type _ CODE[REF TEXT];
UnderPtrText: Type _ CODE[LONG POINTER TO TEXT];
TypeOfTV1: Type = CODE[TV];
TypeOfTV2: Type = CODE[RTBasic.TypedVariable];
Pair: TYPE = MACHINE DEPENDENT RECORD [lo, hi: CARDINAL];
EnsureInit: ENTRY PROC = {
ENABLE UNWIND => NULL;
IF needInit THEN {
ENABLE {ABORTED => GO TO abort; ANY => GO TO notNow};
UnderBoolean _ UnderType[UnderBoolean]; 
UnderString _ UnderType[UnderString]; 
UnderLongString _ UnderType[UnderLongString];
UnderRefText _ UnderType[UnderRefText];
UnderPtrText _ UnderType[UnderPtrText];
needInit _ FALSE;
EXITS
notNow => {};
abort => RETURN WITH ERROR ABORTED;
};
};

Print: PUBLIC PROC
[tv: TV, put: PutClosure, depth: INT _ 4, width: INT _ 32, verbose: BOOL _ FALSE] = {
putproc: PutProc = put.proc;
putdata: REF = put.data;
PutChar: PROC [c: CHAR] = {
putproc[putdata, c]
};
PutCard: PROC [oct: LONG CARDINAL, tail: CHAR _ 'B] = {
Convert.MapValue[PutChar, [unsigned[oct, 8]]]; 
IF oct > 7 AND tail # 0C THEN PutChar[tail]
};
PutCardRope: PROC [oct: LONG CARDINAL, tail: ROPE _ NIL] = {
Convert.MapValue[PutChar, [unsigned[oct, 8]]]; 
IF oct > 7 THEN PutChar['B];
PutRope[tail];
};
PutCardInt: PROC [oct: LONG CARDINAL, tail: CHAR _ 'B] = {
Convert.MapValue[PutChar, [unsigned[oct, 8]]];
IF oct > 7 THEN { 
IF tail # 0C THEN PutChar[tail]; 
PutChar[' ]; 
PutChar['(]; 
Convert.MapValue[PutChar, [unsigned[oct, 10]]]; 
PutChar[')]};
}; 
PutInt: PROC [dec: INT] = {
Convert.MapValue[PutChar, [signed[dec, 10]]]
}; 
PutCharB: PROC [c: CHAR] RETURNS [BOOL] = {
PutChar[c]; RETURN [FALSE]
}; 
PutCharLit: PROC [c: CARDINAL] = {
IF c IN [40B..176B] THEN {
ch: CHAR _ LOOPHOLE[c];
PutChar[''];
IF ch = '\\ THEN PutChar[ch];
PutChar[ch];
RETURN}; 
PutCard[LONG[LOOPHOLE[c, CARDINAL]], 'C]; 
IF c > 377B THEN PutChar['!]
}; 
PutWords: PROC [tv: TV, prefix: ROPE _ NIL, postfix: ROPE _ NIL] = TRUSTED {
ENABLE {ABORTED => GO TO abort; ANY => GO TO err};
size: INT _ 0;
IF prefix # NIL AND prefix.Size[] > 0 THEN PutRope[prefix]; 
size _ TVSize[tv]; 
SELECT size FROM 
0 => PutRope["[]"];
1 => PutCard[TVToCardinal[tv]];
2 => PutCard[TVToLC[tv]];
ENDCASE => {
sep: ROPE _ NIL;
PutChar['[]; 
FOR i: CARDINAL IN [0..size) DO 
IF i > width THEN {PutRope[", ..."]; EXIT}; 
PutRope[sep]; 
sep _ ", "; 
PutCard[LOOPHOLE[AMBridge.OctalRead[tv, i], CARDINAL]]
ENDLOOP; 
PutChar[']]; 
};
IF postfix # NIL AND postfix.Size[] > 0 THEN PutRope[postfix]
EXITS
abort => ERROR ABORTED;
err => PutErr["??"]
}; 
PutRope: PROC [r: ROPE] = {
[] _ Rope.Map[base: r, action: PutCharB]
}; 
PutEscape: PROC [c: CHAR] RETURNS [BOOL] = {
IF c = '\\ OR c = '" THEN PutChar['\\]; 
IF c < 40C OR c >= 177C THEN {
PutChar['\\];
SELECT c FROM
'\n => PutChar['n];
'\t => PutChar['t];
ENDCASE => {
PutChar['0 + (c - 0C) / 64]; 
PutChar['0 + (c - 0C) MOD 64 / 8]; 
PutChar['0 + (c - 0C) MOD 8]} 
}
ELSE PutChar[c]; 
RETURN [FALSE]
}; 
PutRopeConst: PROC [r: ROPE, max: INT] = {
size: INT _ r.Size[];
max _ max + 16; -- allow for a reasonable minimum length
PutChar['\"]; 
[] _ Rope.Map[base: r, start: 0, len: max, action: PutEscape]; 
IF size > max THEN PutRope["..."]; 
PutChar['"]
}; 
QPutName: PROC [name: ROPE] = {
IF name.Size[] = 0 THEN PutRope["??"] ELSE PutRope[name]
}; 
PutSelector: PROC [name: ROPE, tail: ROPE] = {
IF name.Size[] > 0 THEN {
PutRope[name]; 
PutRope[tail]}
}; 
PutStringConst: PROC [s: LONG STRING] = TRUSTED {
len: CARDINAL _ s.length;
charsToPrint: CARDINAL _ len;
max: CARDINAL _ width * depth;
IF max < charsToPrint THEN charsToPrint _ max;
IF max < 8 THEN max _ max + 16;
PutChar['"];
FOR i: CARDINAL IN [0..charsToPrint) DO
[] _ PutEscape[s[i]];
ENDLOOP;
IF len > charsToPrint THEN PutRope["..."];
PutChar['"]; 
}; 
PutErr: PROC [r1,r2: ROPE _ NIL] = {
PutRope["--{"]; 
PutRope[r1];
IF r2 # NIL THEN PutRope[r2];
PutRope["}--"]
};
PutRecord: PROC [tv: TV, start: NAT _ 0, depth: INT _ 0] = {
size: Index; 
sep: ROPE _ NIL; 
type: Type;
innerSize: PROC = {
type _ TVType[tv];
size _ NComponents[type]};
IF depth <= 1 THEN {PutRope["[...]"]; RETURN}; 
sep _ Mother[innerSize]; 
IF sep # NIL THEN {PutErr["can't examine, ", sep]; RETURN}; 
PutChar['[]; 
IF depth = 1 THEN {PutRope["...]"]; RETURN}; 
FOR i: Index IN [start..size] DO 
name: ROPE; 
inner: TV _ NIL;
quitFlag: BOOL _ FALSE;
innerIndexToTV: PROC = {
inner _ IndexToTV[tv, i]};
innerPut: PROC = {
itype: Type _ TVType[inner]; 
iunder: Type;
iclass: Class; 
[iunder, iclass] _ UnderTypeAndClass[itype]; 
IF i = size AND iclass = union THEN  {
variantTV: TV; 
IF IsOverlaid[iunder] THEN {PutRope["--Overlaid--"]; RETURN};
IF IsComputed[iunder] THEN {PutRope["--Computed--"]; RETURN};
variantTV _ Variant[inner]; 
QPutName[TVToName[Tag[inner]]]; 
PutRecord[variantTV, i, depth - 1]; 
RETURN}; 
PutTV[inner, depth - 1];
};
msg: ROPE _ NIL;
IF i > width THEN {PutRope[", ..."]; EXIT}; 
name _ IndexToName[type, i]; 
PutRope[sep]; 
sep _ ", "; 
PutSelector[name, ": "];
msg _ Mother[innerIndexToTV];
IF msg # NIL THEN {PutErr["Can't get element: ", msg]; LOOP}; 
msg _ Mother[innerPut];
IF msg # NIL THEN {PutErr["Can't print element: ", msg]; LOOP}; 
ENDLOOP; 
PutChar[']]
}; 
PutTVAsType: PROC [tv: TV] = TRUSTED {
type: Type _ TVToType[tv];
PrintTV.PrintType[type, put];
}; 
PutTypeOfTV: PROC [tv: TV, class: Class] = {
inner: PROC = {
SELECT class FROM 
globalFrame => PutRope["--GlobalFrame--"];
localFrame => PutRope["--LocalFrame--"]
ENDCASE => {
type: Type _ TVType[tv]; 
PrintTV.PrintType[type, put];
};
};
msg: ROPE _ Mother[inner];
IF msg # NIL THEN PutErr[msg];
};
PutTV: PROC [tv: TV, depth: INT, verbose: BOOL _ FALSE] = TRUSTED {
deep: BOOL _ TRUE; 
msg1, msg2: ROPE _ NIL;
IF tv = NIL THEN {PutRope["NIL"]; RETURN}; 
IF depth <= 0 THEN {PutRope["&"]; RETURN};
IF NOT HandledByPrintProc[tv: tv, type: TVType[tv]] THEN {
inner: PROC = TRUSTED {
PutTVNoCatch[tv, depth, verbose];
};
msg: ROPE _ Mother[inner];
IF msg # NIL THEN PutErr[msg];
};
};
HandledByPrintProc: PROC [tv: TV, type: Type, refTV: TV _ NIL] RETURNS[handled: BOOL _ FALSE] = TRUSTED {
proc: Interceptor _ NIL;
data: REF _ NIL;
isRemote: BOOL = AMBridge.IsRemote[tv];  
deReferenced: BOOL = refTV # NIL;
enabled, canHandleRemote: BOOL _ FALSE;
[proc, data, enabled, canHandleRemote] _ GetInterceptor[type, deReferenced];
IF proc # NIL AND enabled AND (canHandleRemote OR ~isRemote) THEN {
ENABLE {
ABORTED => GO TO abort;
UNWIND, AMEvents.Debugging, AMEvents.Debugged => NULL;
ANY =>
{SetEnabled[type: type, deReferenced: deReferenced, enabled: FALSE];
REJECT};
};
useOld: BOOL _ proc[IF deReferenced THEN refTV ELSE tv, data, put, depth, width];
RETURN[NOT useOld]
};
EXITS
abort => ERROR ABORTED
};
PutTVNoCatch: PROC
[tv: TV, depth: INT, verbose: BOOL _ FALSE, type: Type _ nullType]
= TRUSTED {{
fooey: BOOL _ FALSE; 
under: Type; 
class: Class;
isRemote: BOOL _ AMBridge.IsRemote[tv];
putList: PROC [node: TV] =  CHECKED {
sep: ROPE _ NIL; 
count: INT _ 0;
PutRope["("];  -- used to be LIST[ 
WHILE node # NIL DO 
elem: TV _ IndexToTV[node, 2];
IF node = NIL THEN EXIT; 
PutRope[sep]; 
sep _ ", "; 
IF (count _ count + 1) > width THEN 
{PutRope["..."]; EXIT}; 
PutTV[IndexToTV[node, 1], depth]; 
node _ Referent[IndexToTV[node, 2]];
ENDLOOP; 
PutChar[')];
}; -- used to be ] when ( was LIST

isAList: PROC [underType: Type] RETURNS [result: BOOL _ FALSE] = CHECKED {
IF TypeClass[underType] = structure AND NComponents[underType] = 2 THEN {
ENABLE AMTypes.Error => GO TO nope;
IF RTTypesBasic.EquivalentTypes[
Range[IndexToType[underType, 2]],
underType]
THEN RETURN [TRUE];
EXITS nope => {};
};
RETURN [FALSE];
};

IF type = nullType THEN type _ TVType[tv]; 
[under, class] _ UnderTypeAndClass[type]; 

SELECT class FROM 
definition => ERROR;
record => PutRecord[tv, 1, depth];
structure =>
{IF isAList[under] THEN
{putList[tv]; RETURN};  
PutRecord[tv, 1, depth]};

union => 
PutWords[tv, "UNION#"]; -- shouldn't really happen

array, sequence => {
indexType: Type _ AMTypes.Domain[type]; 
index: TV _ AMTypes.First[indexType]; 
sep: ROPE _ NIL; 
max: INT _ LAST[INT];
IF AMTypes.UnderClass[indexType] = integer THEN {
index _ AMTypes.Copy[index];
AMBridge.SetTVFromLI[index, 0];
};
IF class = sequence
THEN
max _ AMTypes.Length[tv]
ELSE {
low: INT _ AMBridge.TVToLI[index];
high: INT _ AMBridge.TVToLI[AMTypes.Last[indexType]];
max _ high-low+1;
};
PutRope["("]; 
PutInt[max]; 
PutRope[")["];
IF depth <= 1 THEN {PutRope["...]"]; RETURN}; 
FOR i: INT IN [0..width] WHILE index # NIL AND i < max DO
ENABLE {AMTypes.Error => GO TO urp}; 
elem: TV _ NIL; 
msg: ROPE _ NIL;
IF i = width THEN {PutRope[", ..."]; EXIT}; 
PutRope[sep];
sep _ ", "; 
elem _ AMTypes.Apply[tv, index]; 
PutTV[elem, depth - 1];
index _ AMTypes.Next[index];
ENDLOOP; 
PutChar[']];
EXITS
urp => {PutErr["Can't fetch element"]; PutChar[']]}};

enumerated => {
name: ROPE _ NIL;
wrap: BOOL _ verbose AND under # UnderBoolean AND under # type; 
IF wrap THEN {
PutTypeOfTV[tv, class]; 
PutChar['[]}; 
name _ TVToName[tv ! AMTypes.Error => CONTINUE]; 
IF name = NIL 
THEN PutWords[tv, NIL, "?"] 
ELSE QPutName[name]; 
IF wrap THEN PutChar[']];
};

subrange => {
ground: Type = GroundStar[under]; 
wide: TV _ NIL; 
wide _ Coerce[tv, ground ! AMTypes.Error => CONTINUE]; 
IF wide = NIL 
THEN PutWords[tv, "??"] 
ELSE PutTV[wide, depth];
};

opaque => 
PutWords[tv, "OPAQUE#"];

countedZone => 
PutWords[tv, "ZONE#"];

uncountedZone => 
PutWords[tv, "UZONE#"];

list => {
count: INT _ 0;
valid: BOOL _ FALSE; 
IF IsNil[tv] THEN  {
PutRope["NIL"]; RETURN};
valid _ LocalValidate[tv, class];
IF depth <= 2 OR NOT valid THEN {
PutCardRope[TVToLC[tv], IF valid THEN "^" ELSE "^??"]; 
RETURN};
putList[Referent[tv]];
};  

atom => {
IF IsNil[tv] THEN PutRope["NIL"]
ELSE {PutChar['$]; PutRope[TVToName[tv]]};
};

rope => {
IF IsNil[tv] THEN PutRope["NIL"]
ELSE PutRopeConst[TVToName[tv], width * depth];
};

ref => {
referentTV: TV _ NIL;
referentType: Type;
bits: LONG CARDINAL = TVToLC[tv]; 
rangeClass: Class;
msg: ROPE _ NIL;
useReferent: BOOL _ depth > 2;
inner: PROC = TRUSTED {
[, rangeClass] _ UnderTypeAndClass[Range[under]];
IF useReferent THEN referentTV _ Referent[tv];
}; 
IF IsNil[tv] THEN {PutRope["NIL"]; RETURN};
IF NOT LocalValidate[tv] THEN {PutCardRope[bits, "^??"]; RETURN};
IF AMTypes.IsRefAny[type] THEN {
IF AMTypes.IsAtom[tv] THEN {
PutChar['$];
PutRope[TVToName[tv]];
RETURN};
IF AMTypes.IsRope[tv] THEN {
PutRopeConst[TVToName[tv], width * depth];
RETURN};
};
IF useReferent THEN msg _ Mother[inner];
IF msg # NIL OR NOT useReferent THEN {
PutCardRope[bits, "^"]; 
IF msg # NIL THEN PutErr[msg]; 
RETURN}; 
referentType _ TVType[referentTV];
IF HandledByPrintProc[tv: referentTV, type: referentType, refTV: tv]
THEN RETURN;  -- Note that in this case, if the print proc causes an error (has a bug in it), you won't get a chance to debug the printproc because Mother is above you on the stack.
IF isAList[underType: referentType] THEN {
putList[referentTV];
RETURN};
PutChar['^];   -- used to be @
PutTV[referentTV, depth - 1];
};

pointer => {
bits: CARDINAL _ TVToCardinal[tv];
short: POINTER _ LOOPHOLE[bits];
lp: LONG POINTER _ short;
IF bits = 0 THEN {PutRope["NIL"]; RETURN};
IF NOT LocalValidate[tv] THEN {PutCardRope[bits, "@??"]; RETURN}; 
IF under = UnderString THEN {
PutStringConst[LOOPHOLE[short, STRING]];
RETURN}; 
PutCardRope[bits, "@"];
};

longPointer, basePointer => {
bits: LONG CARDINAL _ TVToLC[tv];
IF IsNil[tv] THEN {PutRope["NIL"]; RETURN};
IF NOT LocalValidate[tv] THEN {PutCardRope[bits, "@??"]; RETURN}; 
IF under = UnderLongString OR under = UnderPtrText THEN
IF NOT isRemote THEN {
PutStringConst[LOOPHOLE[bits, LONG STRING]];
RETURN}; 
PutCardRope[bits, "@"];
};

relativePointer => {
IF IsNil[tv] THEN {PutRope["NIL"]; RETURN};
PutInt[TVToLC[tv]];
PutRope["^R"];
};

descriptor, longDescriptor =>  {
ws: AMBridge.WordSequence = AMBridge.TVToWordSequence[tv];
base: LONG CARDINAL _ 0;
len: CARDINAL _ 0;
PutRope["DESCRIPTOR["];
SELECT class FROM
descriptor => {
shortDesc: LONG POINTER TO DESCRIPTOR FOR ARRAY OF WORD =
LOOPHOLE[@ws[0]];
base _ LOOPHOLE[BASE[shortDesc^], CARDINAL];
len _ LENGTH[shortDesc^];
};
longDescriptor => {
longDesc: LONG POINTER TO LONG DESCRIPTOR FOR ARRAY OF WORD =
LOOPHOLE[@ws[0]]; 
base _ LOOPHOLE[BASE[longDesc^]];
len _ LENGTH[longDesc^];
};
ENDCASE => ERROR;
IF base = 0 THEN PutRope["NIL, "] ELSE PutCardRope[base, "@, "];
PutInt[len];
PutRope["]"];
};

port => 
PutWords[tv, "PORT#"];

process => 
PutWords[tv, "PROCESS#"];

type =>
PutTVAsType[tv];

nil => 
PutRope["NIL"];

any => 
PutWords[tv, "ANY??"];

globalFrame =>  {
name: ROPE _ TVToName[tv];
PutRope["{globalFrame: "];
QPutName[name];
IF verbose THEN {
gf: CARDINAL _ 
IF isRemote
THEN AMBridge.RemoteGFHFromTV[tv].gfh
ELSE LOOPHOLE[GFHFromTV[tv], CARDINAL];
PutRope[" (GF#"]; 
PutCardRope[gf, ")\n"]; 
PrintVariables[tv, put];
};
PutChar['}];
};

localFrame =>  {
proc: TV _ NIL; 
pc: CARDINAL = AMBridge.ContextPC[tv]; 
lf: CARDINAL = 
IF isRemote
THEN AMBridge.RemoteFHFromTV[tv].fh
ELSE LOOPHOLE[FHFromTV[tv], CARDINAL];
temp: TV _ tv;
WHILE temp # NIL DO
ENABLE AMTypes.Error => EXIT;
next: TV _ NIL;
proc _ Procedure[temp ! AMTypes.Error => CONTINUE];
IF proc # NIL THEN EXIT;
next _ EnclosingBody[temp];
IF next = NIL THEN {
next _ AMTypes.StaticParent[temp];
IF next = NIL OR UnderTypeAndClass[TVType[next]].class = globalFrame
THEN EXIT;
};
temp _ next;
ENDLOOP;
IF proc # NIL THEN {
ENABLE AMTypes.Error => GO TO oops;
IF UnderTypeAndClass[TVType[proc]].class = nil THEN proc _ NIL;
EXITS oops => proc _ NIL;
};
IF proc = NIL THEN {
ENABLE AMTypes.Error => GO TO oops;
gf: TV _ GlobalParent[tv];
IF gf = NIL THEN GO TO oops;
PutRope[TVToName[gf]]; 
PutRope[".??"];
EXITS oops => {PutRope["??"]; RETURN}}
ELSE PutTV[proc, depth]; 
IF verbose THEN {
PutRope["(lf: "]; 
PutCardRope[lf, ", pc: "]; 
PutCardRope[pc, ")"]; 
IF depth > 1 THEN {
PutRope["\nArguments:\n"]; 
PrintArguments[tv: tv, put: put, breakBetweenItems: TRUE];
PutRope["\nVariables:\n"]; 
PrintVariables[tv: tv, put: put, breakBetweenItems: TRUE];
};
PutRope["\n"]; 
};
};

program, procedure, signal, error =>  {
kind: ROPE _ NIL; 
name: ROPE _ NIL; 
useGlobalName: BOOL _ TRUE;
IF IsNil[tv] THEN {PutRope["NIL"]; RETURN}; 
name _ TVToName[tv ! AMTypes.Error => CONTINUE];
SELECT class FROM 
program => {kind _ "PROGRAM#"; useGlobalName _ FALSE};
procedure => kind _ NIL;
signal, error => {
kind _ IF class = signal THEN "SIGNAL " ELSE "ERROR ";
IF AllCaps[name] THEN useGlobalName _ FALSE;
}
ENDCASE => ERROR; 
PutRope[kind]; 
IF useGlobalName THEN  {
ENABLE AMTypes.Error => GO TO oops;
gn: ROPE _ NIL; 
gp: TV _ GlobalParent[tv];
IF gp # NIL THEN gn _ TVToName[gp];
QPutName[gn]; 
PutChar['.];
EXITS oops => PutRope["??."];
}; 
QPutName[name];
};
unspecified, cardinal =>
PutCardInt[TVToCardinal[tv]];
integer =>
PutInt[TVToInteger[tv]];
character =>
PutCharLit[TVToCardinal[tv]];
longInteger =>
PutInt[TVToLI[tv]];
longCardinal =>
PutCardInt[TVToLC[tv]];
real => {
periodSeen: BOOL _ FALSE;
putChar1: PROC[char: CHAR] = CHECKED {
IF char = '. THEN periodSeen _ TRUE;
PutChar[char]};
Convert.MapValue[put: putChar1, value: [real[TVToReal[tv]]]];
IF NOT periodSeen THEN PutRope[".0"]};
ENDCASE => ERROR
}
};
IF needInit THEN EnsureInit[];
PutTV[tv, depth, verbose]
};

AllCaps: PROC [name: ROPE] RETURNS [BOOL] = {
FOR i: INT IN [0..name.Size[]) DO
IF name.Fetch[i] IN ['a..'z] THEN RETURN [FALSE];
ENDLOOP;
RETURN [TRUE];
};

PrintArguments: PUBLIC PROC
[tv: TV, put: PutClosure, depth: INT _ 4, width: INT _ 32, breakBetweenItems: BOOL _ FALSE] = {
type: Type;
class: Class;
n: NAT _ 0;
i: NAT _ 0;
inner1: PROC = {
Print[Argument[tv, i], put, depth, width, FALSE];
};
inner: PROC = {
ptv: TV _ NIL;
sep: ROPE _ IF breakBetweenItems THEN "\n  " ELSE ", ";
[type, class] _ UnderTypeAndClass[TVType[tv]];
IF class # localFrame THEN {
PrintRope[put, "-- not a local frame! --"];
RETURN};
ptv _ Procedure[tv ! Error => CONTINUE];
IF ptv = NIL THEN
ptv _ Signal[tv ! Error => CONTINUE];
IF ptv = NIL THEN RETURN;
[type, class] _ UnderTypeAndClass[TVType[ptv]];
IF type = nullType THEN RETURN;
[type, class] _ UnderTypeAndClass[Domain[type]];
IF type = nullType THEN RETURN;
n _ NComponents[type];
IF n = 0 THEN RETURN;
PrintRope[put, "  "];
FOR i IN [1..n] DO
name: ROPE _ IndexToName[type, i];
each: ROPE _ NIL;
IF i > 1 THEN PrintRope[put, sep];
IF name.Size[] # 0 THEN PrintRopes[put, name, ": "];
each _ Mother[inner1];
IF each # NIL THEN
PrintRopes[put, "--{", each, "}--"];
ENDLOOP;
};
msg: ROPE _ Mother[inner];
IF msg # NIL THEN PrintRopes[put, "--{", msg, "}--"];
};

PrintResults: PUBLIC PROC
[tv: TV, put: PutClosure, depth: INT _ 4, width: INT _ 32, breakBetweenItems: BOOL _ FALSE] = {
type: Type;
class: Class;
n: NAT _ 0;
i: NAT _ 0;
inner1: PROC = {
Print[Result[tv, i], put, depth, width, FALSE];
};
inner: PROC = {
ptv: TV _ NIL;
sep: ROPE _ IF breakBetweenItems THEN "\n  " ELSE ", ";
[type, class] _ UnderTypeAndClass[TVType[tv]];
IF class # localFrame THEN {
PrintRope[put, "-- not a local frame! --"]; RETURN};
ptv _ Procedure[tv ! AMTypes.Error => CONTINUE];
IF ptv = NIL THEN
ptv _ Signal[tv ! AMTypes.Error => CONTINUE];
IF ptv = NIL THEN RETURN;
[type, class] _ UnderTypeAndClass[TVType[ptv]];
IF type = nullType THEN RETURN;
[type, class] _ UnderTypeAndClass[Range[type]];
IF type = nullType THEN RETURN;
n _ NComponents[type];
IF n = 0 THEN RETURN;
PrintRope[put, "  "];
FOR i IN [1..n] DO
name: ROPE _ IndexToName[type, i];
each: ROPE _ NIL;
IF i > 1 THEN PrintRope[put, sep];
IF name.Size[] # 0 THEN PrintRopes[put, name, ": "];
each _ Mother[inner1];
IF each # NIL THEN PrintRopes[put, "--{", each, "}--"];
ENDLOOP;
};
msg: ROPE _ Mother[inner];
IF msg # NIL THEN PrintRopes[put, "--{", msg, "}--"];
};

PrintVariables: PUBLIC PROC
[tv: TV, put: PutClosure, depth: INT _ 4, width: INT _ 32, all, breakBetweenItems: BOOL _ TRUE] = TRUSTED {
type: Type;
local, global: BOOL _ FALSE;
class: Class;
n: NAT _ 0;
i: NAT _ 0;
indent: ROPE _ "  ";
sep: ROPE _ IF breakBetweenItems THEN "\n" ELSE ", ";
nvars: NAT _ 0;
inner1: PROC = TRUSTED {
tv1: TV _ IF local THEN Locals[tv] ELSE Globals[tv];
type1: Type _ TVType[tv1];
nvars _ IF tv1 = NIL THEN 0 ELSE NComponents[type1];
FOR i: INT IN [1..nvars] DO
inner2: PROC = TRUSTED {
name: ROPE _ IndexToName[type1, i];
IF breakBetweenItems THEN PrintRope[put, indent];
IF name.Size[] # 0 THEN PrintRopes[put, name, ": "];
Print[IndexToTV[tv1, i], put, depth, width]
};
IF i > 1 THEN PrintRope[put, sep];
msg _ Mother[inner2];
IF msg # NIL THEN PrintRopes[put, "--{", msg, "}--"];
ENDLOOP;
IF local
THEN tv _ EnclosingBody[tv]
ELSE tv _ NIL;
IF breakBetweenItems THEN indent _ Rope.Concat[indent, "  "];
};
inner: PROC = TRUSTED {
[type, class] _ UnderTypeAndClass[TVType[tv]];
SELECT class FROM
globalFrame => global _ TRUE;
localFrame => local _ TRUE;
ENDCASE =>{PrintRope[put, "--{not a frame}--"]; RETURN};
WHILE tv # NIL DO
IF nvars # 0 THEN PrintRope[put, sep];
msg _ Mother[inner1];
IF msg # NIL THEN {
PrintRopes[put, "--{", msg, "}--"];
EXIT};
IF NOT all THEN EXIT;
ENDLOOP;
};
msg: ROPE;
msg _ Mother[inner];
IF msg # NIL THEN PrintRopes[put, "--{", msg, "}--"];
};

PrintPointer: PUBLIC PROC
[world: World, addr: Address, type: Type, put: PutClosure, depth: INT _ 4, width: INT _ 32]
= TRUSTED {
IF addr = 0
THEN PrintRope[put, "NIL"]
ELSE {
inner: PROC = TRUSTED {
tv: TV _ NIL;
IF world = WorldVM.LocalWorld[]
THEN tv _ TVForPointerReferent[LOOPHOLE[addr, LONG POINTER], type]
ELSE tv _ AMBridge.TVForRemotePointerReferent
[[world, world.CurrentIncarnation[], addr], type];
Print[tv, put, depth, width, FALSE];
};
msg: ROPE _ Mother[inner];
IF msg # NIL THEN {
PrintOctalErr[put, addr];
PrintRopes[put, "--{", msg, "}--"];
};
};
};

PrintRef: PUBLIC PROC
[ref: REF READONLY ANY, put: PutClosure, depth: INT _ 4, width: INT _ 32] = TRUSTED {
IF ref = NIL
THEN PrintRope[put, "NIL"]
ELSE {
tv: TV _ NIL;
inner: PROC = TRUSTED {
Print[
TVForReferent[NEW[REF _ LOOPHOLE[ref, REF]]],
put, depth, width, FALSE];};
msg: ROPE _ Mother[inner];
IF msg # NIL
THEN PrintRopes[put, "--{", msg, "}--"];
};
};

PrintRopes: PROC [put: PutClosure, r1,r2,r3,r4: ROPE _ NIL] = {
IF r1 # NIL THEN PrintRope[put, r1];
IF r2 # NIL THEN PrintRope[put, r2];
IF r3 # NIL THEN PrintRope[put, r3];
IF r4 # NIL THEN PrintRope[put, r4];
};

PrintRope: PROC [put: PutClosure, r: ROPE _ NIL] = {
putproc: PutProc _ put.proc;
putdata: REF _ put.data;
FOR i: INT IN [0..r.Size[]) DO
putproc[putdata, r.Fetch[i]];
ENDLOOP;
};

PrintOctalErr: PROC [put: PutClosure, addr: Address] = {
put1: PROC [c: CHAR] = {put.proc[put.data, c]};
Convert.MapValue[put1, [unsigned[addr, 8]]];
PrintRope[put, "B^??"];
};
IntToRope: PROC [int: INT] RETURNS [ROPE] = {
RETURN [Convert.ValueToRope[[signed[int]]]]};

UnderTypeAndClass: PROC [type: Type] RETURNS [under: Type, class: Class] = {
under _ type;
WHILE (class _ TypeClass[under]) = definition DO
under _ UnderType[under];
ENDLOOP;
};

AddrForFrameTV: PROC [frame: TV] RETURNS [world: World, addr: Address] = TRUSTED {
class: Class _ TypeClass[UnderType[TVType[frame]]];
world _ WorldVM.LocalWorld[];
addr _ 0;
SELECT class FROM
localFrame, globalFrame => {};
ENDCASE => RETURN;
IF AMBridge.IsRemote[frame]
THEN {
card: CARDINAL _ 0;
world _ AMBridge.GetWorld[frame];
IF class = localFrame
THEN card _ LOOPHOLE[AMBridge.RemoteFHFromTV[frame].fh, CARDINAL]
ELSE card _ LOOPHOLE[AMBridge.RemoteGFHFromTV[frame].gfh, CARDINAL];
addr _ WorldVM.Long[world, card];
}
ELSE {
sp: POINTER _ 
IF class = localFrame
THEN LOOPHOLE[FHFromTV[frame], POINTER]
ELSE LOOPHOLE[GFHFromTV[frame], POINTER];
lp: LONG POINTER _ sp;
addr _ LOOPHOLE[lp, LONG CARDINAL];
};
};

LocalValidate: PROC [tv: TV, class: Class _ definition] RETURNS [BOOL] = TRUSTED {
isRemote: BOOL _ AMBridge.IsRemote[tv];
validateRef: BOOL _ FALSE;
world: World _
IF isRemote THEN AMBridge.GetWorld[tv] ELSE WorldVM.LocalWorld[];
bits: Address _ 0;
IF class = definition THEN
class _ TypeClass[UnderType[TVType[tv]]];
SELECT class FROM
definition => RETURN [FALSE]; -- huh?
atom, rope, list, ref, countedZone => {
validateRef _ TRUE;
bits _ TVToLC[tv];
};
longPointer, uncountedZone, basePointer => {
bits _ TVToLC[tv];
};
pointer => {
bits _ WorldVM.Long[world, TVToCardinal[tv]];
};
globalFrame, localFrame => 
[world, bits] _ AddrForFrameTV[tv];
ENDCASE => RETURN [TRUE];
IF bits = 0 THEN RETURN [FALSE];
[] _ WorldVM.Read[world, bits ! WorldVM.AddressFault => GO TO bad];
RETURN [TRUE];
EXITS
bad => RETURN [FALSE];
}; 
Mother: PUBLIC PROC [inner: PROC] RETURNS [ROPE] = TRUSTED {
msg1, msg2: ROPE _ NIL;
kind: AMTypes.ErrorReason;
useKind: BOOL _ FALSE;
{ENABLE
{
CIFS.Error => {
msg1 _ "CIFS.Error";
msg2 _ error;
MaybeLeaveKansas[]; 
GO TO oops};
PageFault.AddressFault => {
msg1 _ "AddressFault"; 
msg2 _ Convert.ValueToRope
[[unsigned[LOOPHOLE[address, LONG CARDINAL], 8]]];
msg2 _ msg2.Concat["B"];
MaybeLeaveKansas[]; 
GO TO oops};
AMTypes.Error => {
kind _ reason;
useKind _ TRUE;
msg2 _ msg; 
MaybeLeaveKansas[]; 
GO TO oops};
RTTypesBasic.InvalidType => {
msg1 _ "InvalidType"; 
MaybeLeaveKansas[]; 
GO TO oops};
Runtime.BoundsFault => {
msg1 _ "BoundsFault"; 
MaybeLeaveKansas[]; 
GO TO oops};
Runtime.ControlFault => {
msg1 _ "ControlFault"; 
MaybeLeaveKansas[]; 
GO TO oops};
Runtime.DivideCheck => {
msg1 _ "DivideCheck"; 
MaybeLeaveKansas[]; 
GO TO oops};
Runtime.PointerFault => {
msg1 _ "PointerFault"; 
MaybeLeaveKansas[]; 
GO TO oops};
Runtime.StartFault =>  {
msg1 _ "StartFault"; 
MaybeLeaveKansas[]; 
GO TO oops};
Runtime.StackError => {
msg1 _ "StackError"; 
MaybeLeaveKansas[]; 
GO TO oops};
Runtime.UnboundProcedure =>  {
msg1 _ "UnboundProcedure"; 
MaybeLeaveKansas[]; 
GO TO oops};
Runtime.ZeroDivisor => {
msg1 _ "ZeroDivisor"; 
MaybeLeaveKansas[]; 
GO TO oops};
Space.InsufficientSpace => {
msg1 _ "Space.InsufficientSpace"; 
MaybeLeaveKansas[]; 
GO TO oops};
WriteFault.WriteProtectFault => {
msg1 _ "WriteProtectFault"; 
msg2 _ Convert.ValueToRope
[[unsigned[LOOPHOLE[address, LONG CARDINAL], 8]]];
msg2 _ msg2.Concat["B"];
MaybeLeaveKansas[]; 
GO TO oops};
WorldVM.AddressFault => {
msg1 _ "AddressFault"; 
msg2 _ Convert.ValueToRope
[[unsigned[LOOPHOLE[addr, LONG CARDINAL], 8]]];
msg2 _ msg2.Concat["B"];
MaybeLeaveKansas[]; 
GO TO oops};
WorldVM.BadWorld => {
msg1 _ "WorldVM.BadWorld"; 
MaybeLeaveKansas[]; 
GO TO oops};
ABORTED => GO TO aborted;
ANY => {
IF alwaysRejectAny THEN REJECT;
msg1 _ "UnknownError"; 
MaybeLeaveKansas[]; 
GO TO oops}
};
inner[];
RETURN [NIL];
EXITS
aborted =>
ERROR ABORTED;
oops => {
msg: ROPE _ msg1;
IF useKind THEN
msg _ SELECT kind FROM
noSymbols => "noSymbols",
notImplemented => "notImplemented",
incompatibleTypes => "incompatibleTypes",
rangeFault => "rangeFault",
notMutable => "notMutable",
internalTV => "internalTV",
badName => "badName",
badIndex => "badIndex",
typeFault => "typeFault",
ENDCASE => "??";
IF msg2 # NIL THEN 
msg _ msg.Cat["[", msg2, "]"]; 
lagLagMsg _ lagMsg; 
RETURN[(lagMsg _ msg)]};
};
}; 
lagMsg: ROPE _ NIL;  -- used to usually avoid GC of error message
lagLagMsg: ROPE _ NIL; -- nothing like being safe...

alwaysRejectAny: BOOL _ FALSE;

MaybeLeaveKansas: PROC = TRUSTED {
IF OZ THEN
Runtime.CallDebugger["Toto, I don't think that we are in Kansas anymore..."];
};

OZ: BOOL _ FALSE; -- used to enter debugger when a signal/error occurs
interceptorList: InterceptorList _ NIL;
lastInterceptorList: InterceptorList _ NIL;
InterceptorList: TYPE = LIST OF InterceptorListRecord;
InterceptorListRecord: TYPE = RECORD [
type: Type, origType: Type, proc: Interceptor, data: REF, enabled: BOOL, deReferenced: BOOL, canHandleRemote: BOOL];

Intercept: PUBLIC ENTRY PROC
[type: Type, proc: Interceptor _ NIL, data: REF _ NIL, canHandleRemote: BOOL _ FALSE] = {
ENABLE UNWIND => NULL;
DoIntercept[type: type, proc: proc, data: data, canHandleRemote: canHandleRemote];
SELECT TypeClass[UnderType[type]] FROM
ref, list =>
DoIntercept[
type: Range[type],
proc: proc,
data: data,
canHandleRemote: canHandleRemote,
deReferenced: TRUE];

ENDCASE;
};

DoIntercept:  PROC
[type: Type, proc: Interceptor, data: REF, deReferenced, canHandleRemote: BOOL _ FALSE]
= {
ENABLE UNWIND => NULL;
lag, new: InterceptorList _ NIL;
canonType: Type _ type;
IF type = LOOPHOLE[0, Type] THEN RETURN WITH ERROR InvalidInterceptor;
SELECT TypeClass[type] FROM
globalFrame, localFrame => NULL; -- cant call GetCanonicalType or causes an address fault.
ENDCASE => canonType _ RTTypesBasic.GetCanonicalType[type];
new _ LIST[[type: canonType, origType: type, proc: proc, data: data,
enabled: TRUE, deReferenced: deReferenced, canHandleRemote: canHandleRemote]];
IF interceptorList = NIL THEN {interceptorList _ new; RETURN};
FOR x: InterceptorList _ interceptorList, x.rest WHILE x # NIL DO
IF LOOPHOLE[x.first.type, CARDINAL] >= LOOPHOLE[canonType, CARDINAL]
THEN EXIT;
lag _ x;
ENDLOOP;
IF lag = NIL
THEN {
new.rest _ interceptorList;
interceptorList _ new}
ELSE {
new.rest _ lag.rest;
lag.rest _ new};
WHILE new.rest # NIL AND new.rest.first.type = canonType AND new.rest.first.deReferenced = deReferenced DO  -- remove any old definitions.
new.rest _ new.rest.rest;
ENDLOOP;
lastInterceptorList _ new;
};


interceptsEnabled: BOOL _ TRUE; -- for debugging

GetInterceptor: PUBLIC ENTRY PROC
[type: Type, deReferenced: BOOL]
RETURNS [proc: Interceptor, data: REF, enabled,  canHandleRemote: BOOL] = {
ENABLE UNWIND => NULL;
under: Type;
class: Class;
[proc, data, enabled, canHandleRemote] _ DoGetInterceptor[type, deReferenced];
IF proc # NIL AND enabled THEN RETURN;
[under, class] _ UnderTypeAndClass
[type ! ABORTED => GO TO abort; ANY => GO TO nope];
[proc, data, enabled, canHandleRemote] _ DoGetInterceptor[under, deReferenced];
EXITS
abort => RETURN WITH ERROR ABORTED;
nope => {};
};

DoGetInterceptor: PROC
[type: Type, deReferenced: BOOL]
RETURNS [proc: Interceptor, data: REF, enabled, canHandleRemote: BOOL] = {
x: InterceptorList _ lastInterceptorList;
IF NOT interceptsEnabled THEN RETURN [NIL, NIL, FALSE, FALSE];
SELECT TypeClass[type] FROM
globalFrame, localFrame =>
NULL; -- cant call GetCanonicalType or causes an address fault.
ENDCASE => type _ RTTypesBasic.GetCanonicalType[type];
IF x # NIL AND x.first.type = type AND x.first.deReferenced = deReferenced THEN
RETURN [x.first.proc, x.first.data, x.first.enabled, x.first.canHandleRemote];
FOR x _ interceptorList, x.rest UNTIL x = NIL DO
IF x.first.proc = NIL THEN LOOP;
IF x.first.type = type AND x.first.deReferenced = deReferenced THEN {
lastInterceptorList _ x;
RETURN [x.first.proc, x.first.data, x.first.enabled, x.first.canHandleRemote]};
IF LOOPHOLE[x.first.type, CARDINAL] > LOOPHOLE[type, CARDINAL]
THEN EXIT;
ENDLOOP;
RETURN [NIL, NIL, FALSE, FALSE];
};

SetEnabled: PUBLIC ENTRY PROC
[type: Type, deReferenced: BOOL, enabled: BOOL _ TRUE] = {
ENABLE UNWIND => NULL;
[] _ DoGetInterceptor[type, deReferenced];
IF lastInterceptorList # NIL THEN lastInterceptorList.first.enabled _ enabled;
};

NextInterceptor: PUBLIC ENTRY PROC
[after: Type _ LOOPHOLE[0]]
RETURNS [type:Type, proc: Interceptor, data: REF, enabled: BOOL] = {
ENABLE UNWIND => NULL;
x: InterceptorList _ lastInterceptorList;
IF x = NIL OR LOOPHOLE[x.first.type, CARDINAL] > LOOPHOLE[after, CARDINAL]
THEN x _ interceptorList;
FOR x _ x, x.rest UNTIL x = NIL DO
IF x.first.proc = NIL THEN LOOP;
IF LOOPHOLE[x.first.type, CARDINAL] > LOOPHOLE[after, CARDINAL] THEN EXIT;
ENDLOOP;
IF x = NIL THEN RETURN [after, NIL, NIL, FALSE];
lastInterceptorList _ x;
RETURN [x.first.type, x.first.proc, x.first.data, x.first.enabled];
};

InvalidInterceptor: PUBLIC ERROR = CODE;

END.  

September 1, 1982 10:57 am fixed bug in PrintType so that LONG STRING would print correctly.
September 14, 1982 2:23 pm converted all 3.4 comments to real code, took out 3.3 stuff
September 17, 1982 11:04 am fixed printing of tv for tv, local frame. took out workarounds for IsAtom and IsRope.
September 21, 1982 11:06 pm fixed rope printing to distinguish between NIL and ""
October 6, 1982 8:14 pm (RRA) fixed PrintVariables[... all: TRUE ...] & descriptor printing

φPrintTVImpl.mesa
Russ Atkinson, May 27, 1983 11:49 am
Warren Teitelman, February 5, 1983 3:50 pm
miscellaneous types and constants
procedures
this routine must be relatively indestructible!!!
try to get user print proc
separate procedure because can be called from both ref, list, and structure case case. start with node, rather than element, because in case of structure, already at the node.
copied from ListImpl (in order to avoid dependency on List so Russ can use PrintTVImpl stand alone. 
checks whether the rest field points to an object whose type is the same as the referrent of ref. Note that it is nnecessary to check to see whether TypeClass[IndexToType[underType, 2]] = list since this is a stronger test, i.e. that it is equivalent to the type of the first list node. The catch phrase is to handle REF ANY, for which Range causes a typefault.
Absolutely miserable kludge to get around indexing by INTEGER
For sequences, the length is easy to find
For arrays, we have to do this the hard way (sigh)
First show the number of elements
Next test to see if we have anything to print
Now try to output the remainder of the elements
try to get the referent
use the octal
try to get user print proc
this handles object of type TYPE.
Objects of type RTBasic.Type are also printed this way via a printproc.
print the arguments to the given local frame
the depth and width args apply to the individual printing
an error msg is printed if this is not a local frame
print the results for the given local frame
the depth and width args apply to the individual printing
an error msg is printed if this is not a local frame
print the results for the given local frame
the depth and width args apply to the individual printing
an error msg is printed if this is not a local frame
if all = TRUE, then all variables in the frame are printed
print the given long pointer as a pointer to the given type; an error msg is printed if there are any errors
print the contents of the given ref; an error msg is printed if there are any errors
should be a benign loophole. n.b., if instead REF READONLY ANY is used, then won't get printprocs because the types will be different.
miscellaneous utility routines
local
will only work for pointers right now...
ref-checking will have to wait (sigh)
ref-class stuff
ptr-class stuff
lengthen this first
address validation first
ref validation next (someday)
Safety and mother
Print Interceptor stuff
... intercepts printing for the given type; proc will be called when PrintTV.Print tries to print the given type (proc = NIL removes the print proc for the type); data will be supplied when proc is called (faking a closure); type = 0 => ERROR InvalidInterceptor
if user defines a printproc for REF FOO, then a REF ANY that happens to be a REF FOO should also print using the same printProc. This requires associating the printproc with FOO, but marking it as being deReferenced.
intercepts printing for the given type; proc will be called when PrintTV.Print tries to print the given type (proc = NIL removes the print proc for the type); data will be supplied when proc is called (faking a closure); type = 0 => ERROR InvalidInterceptor
splice it in
Interceptor: TYPE = PROC
[tv: TV, data: REF, put: PutClosure, depth: NAT, width: NAT]
RETURNS [useOld: BOOLEAN];
the type of user's print proc
tv: TV is the thing to print
data: REF is the user's data given to Intercept
put: is the output routine for characters
proc # NIL => print proc provided
enabled => print proc is enabled
sets the enabled flag for the type; no effect if no interceptor for that type
provides a stateless enumerator for print interceptors
error raised by Intercept if bad arguments are given
Edited on December 8, 1982 10:15 pm, by Teitelman
fixed PrintVariables to indent according to nesting (reverse of copilot - outer blocks are indented)
changes to: PrintVariables, inner2 (local of inner1, local of PrintVariables), inner1 (local of PrintVariables)

Edited on December 9, 1982 12:09 am, by Teitelman
fixed catch phrase in HandledByPrintProc to specifically catch AMEvents.Debugging, Debugged so as not to turn off printProcs simply because you plant a breakpoint in them.
changes to: DIRECTORY, IMPORTS, HandledByPrintProc (local of Print)
Edited on January 6, 1983 7:13 pm, by Teitelman
fixed print for tv of type atom where the value is NIL.
changes to: PutTVNoCatch (local of Print)
Edited on January 26, 1983 9:00 pm, by Teitelman
changed TVToLC[tv] = 0 to IsNil[tv]
Edited on March 15, 1983 6:41 pm, by Atkinson
fixed up printing of arrays&sequences
Edited on May 18, 1983 7:27 pm, by Atkinson
made PrintVariables, PrintArguments, and PrintResults more uniform
made printing of proc names for local frames better (using StaticParent)
Edited on May 27, 1983 11:49 am, by Atkinson
fixed bug in descriptor printing (found by Rovner)


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