DIRECTORY Basics, BitTwiddling, Convert, ImagerFont, IO, Real, Rope, RoseBehavior, RoseWireClasses, RoseWireTypes, RoseWireTypeUse, RoseWiring, VFonts;

RoseFixedSequenceImpl: CEDAR PROGRAM
IMPORTS BitTwiddling, ImagerFont, IO, Real, Rope, RoseWireTypes, RoseWireTypeUse, RoseWiring
EXPORTS RoseWireClasses, RoseWireTypes =

BEGIN OPEN RoseWireTypes;

SwitchVal: TYPE = RoseBehavior.SwitchVal;
Level: TYPE = RoseBehavior.Level;

FixSeqRep: TYPE = REF FixSeqRec;
FixSeqRec: TYPE = RECORD [
rwt: RoseWireType,
name: ROPE,
bitSize, wordSize: NAT,
repAux: Mesa _ [],
vanillaMaxWidth: INT _ 0,
vanillaMaxWidthFont: ImagerFont.Font _ NIL,
ewc: RoseWireClass,
ewt: RoseWireType,
eltBitSize, stepBits, eltPad: NAT,
eltDefaultFormat: Format,
length: NAT];

WireFlavorName: PUBLIC ARRAY WireFlavor OF ROPE _ [
simple: "Simple",
switch: "Switch",
drive: "Drive"
];

GetFixedSequence: PUBLIC PROC [prototype: Wire, flavor: WireFlavor] RETURNS [rwc: RoseWireClass] = {
name: ROPE = RoseWiring.WireName[prototype];
rwtUser: RoseWireTypeUse.RoseWireTypeUser = RoseWireTypeUse.CreateUser[];
moduleRefs: ARRAY RoseWireTypeUse.ModuleRefType OF LOR;
length: NAT = prototype.elements.size;
cedarTypeName: ROPE = name.Cat[WireFlavorName[flavor]];
ewc: RoseWireClass = RoseWiring.GetWiring[prototype.elements[0], flavor];
ewt: RoseWireType = ewc.super.GetType[ewc, prototype.elements[0]];
eltBitSize: NAT = ewt.class.super.Bits[ewt];
stepBits: NAT = SELECT TRUE FROM
eltBitSize < 1 => ERROR,
eltBitSize <= 2 => eltBitSize,
eltBitSize <= 4 => 4,
eltBitSize <= 8 => 8,
eltBitSize <= Basics.bitsPerWord => Basics.bitsPerWord,
eltBitSize MOD Basics.bitsPerWord = 0 => eltBitSize,
ENDCASE => ERROR;
eltsPerWord: NAT = Basics.bitsPerWord / stepBits;
bitSize: NAT = IF length <= eltsPerWord
THEN length*stepBits
ELSE ((length + eltsPerWord-1) / eltsPerWord) * eltsPerWord * stepBits;
wordSize: NAT = (bitSize + Basics.bitsPerWord-1) / Basics.bitsPerWord;
fsr: FixSeqRep _ NEW [FixSeqRec _ [
rwt: NIL,
name: cedarTypeName,
bitSize: bitSize,
wordSize: wordSize,
ewc: ewc,
ewt: ewt,
eltBitSize: eltBitSize,
stepBits: stepBits,
eltPad: stepBits - eltBitSize,
eltDefaultFormat: ewc.super.GetFormat[ewt, NIL],
length: length]];
em: Mesa = ewc.super.MesaRepresentation[ewc];
bitBucket: ROPE;
IF prototype.structure # sequence THEN ERROR;
rwtUser.NoteMesa[em];
[bitBucket, moduleRefs] _ rwtUser.DestroyUser[];
IF bitBucket.Length[] # 0 THEN ERROR;
fsr.repAux.directory _ moduleRefs[Directory];
fsr.repAux.imports _ moduleRefs[Import];
IF moduleRefs[Export] # NIL OR moduleRefs[Open] # NIL THEN ERROR;
fsr.repAux.mesa _ IO.PutFR[
"%g: TYPE = PACKED ARRAY [0 .. %g) OF %g",
[rope[fsr.name]],
[integer[fsr.length]],
[rope[em.mesa]]
];
rwc _ NEW[RoseWireClassRec _ [
structure: sequence,
dereference: FALSE,
addressContaining: ewc.dereference OR ewc.addressContaining,
classData: fsr,
super: fixSeqSuperClasses[flavor]]];
fsr.rwt _ NEW[RoseWireTypeRec _ [
class: rwc,
typeData: NIL,
length: fsr.length,
other: NIL]];
};

fixSeqSuperClasses: ARRAY WireFlavor OF RoseWireSuperClass _ ALL[NIL];

FixSeqGetType: PROC [rwc: RoseWireClass, wire: Wire] RETURNS [rwt: RoseWireType] = {
fsr: FixSeqRep = NARROW[rwc.classData];
IF wire.structure # sequence THEN ERROR;
rwt _ fsr.rwt;
};

FixSeqListFormats: PROC [rwt: RoseWireType] RETURNS [lor: LOR] = {
lor _ LIST["vanilla"];
};

FixSeqGetFormat: PROC [rwt: RoseWireType, formatName: ROPE] RETURNS [format: Format] = {
format _ SELECT TRUE FROM
formatName.Equal["vanilla"], formatName=NIL => vanillaFormat,
ENDCASE => ERROR;
};

FixSeqSelectorOffset: PROC [rwt: RoseWireType, sel: Selector] RETURNS [dBits: NAT] = {
fsr: FixSeqRep = NARROW[rwt.class.classData];
WITH sel SELECT FROM
whole => RETURN [0];
field => ERROR;
subscript => RETURN [Suboff[fsr, index]];
ENDCASE => ERROR;
};

Suboff: PROC [fsr: FixSeqRep, i: NAT] RETURNS [dBits: NAT] = {
dBits _ fsr.stepBits * i + fsr.eltPad;
};

FixSeqSubType: PROC [rwt: RoseWireType, sel: Selector] RETURNS [RoseWireType] = {
fsr: FixSeqRep = NARROW[rwt.class.classData];
WITH sel SELECT FROM
whole => RETURN [rwt];
field => ERROR;
subscript => RETURN [fsr.ewt];
ENDCASE => ERROR;
};

FixSeqSubClass: PROC [rwc: RoseWireClass, sel: Selector] RETURNS [RoseWireClass] = {
fsr: FixSeqRep = NARROW[rwc.classData];
WITH sel SELECT FROM
whole => RETURN [rwc];
field => ERROR;
subscript => RETURN [fsr.ewc];
ENDCASE => ERROR;
};

FixSeqBits: PROC [rwt: RoseWireType] RETURNS [n: INT] = {
fsr: FixSeqRep = NARROW[rwt.class.classData];
n _ fsr.bitSize;
};

FixSeqMesaRepresentation: PROC [rwc: RoseWireClass] RETURNS [mesa: Mesa] = {
fsr: FixSeqRep = NARROW[rwc.classData];
mesa _ [mesa: fsr.name];
};

FixSeqMesaRepAux: PROC [rwc: RoseWireClass] RETURNS [mesa: Mesa] = {
fsr: FixSeqRep = NARROW[rwc.classData];
mesa _ fsr.repAux;
};

FixSeqInitialize: PROC [rwt: RoseWireType, p: Ptr, steady: BOOL] = {
fsr: FixSeqRep = NARROW[rwt.class.classData];
FOR i: NAT IN [0 .. fsr.length) DO
fsr.ewc.super.Initialize[
fsr.ewt,
BitTwiddling.OffsetPtr[p, Suboff[fsr, i]],
steady
];
ENDLOOP;
steady _ steady;
};

FixSeqTransduce: PROC [fromS: Strength, fromT, toT: RoseWireType, fromP, toP: Ptr] = {
fsr: FixSeqRep = NARROW[fromT.class.classData];
IF fromT.class.structure # sequence THEN ERROR;
IF toT.class.structure # sequence THEN ERROR;
IF fromT.length # toT.length THEN ERROR;
IF toT.class.dereference THEN toP _ BitTwiddling.DeReferencePtr[toP];
FOR i: NAT IN [0 .. fsr.length) DO
subFrom: Ptr = BitTwiddling.OffsetPtr[fromP, Suboff[fsr, i]];
sel: Selector = [subscript[i]];
subTo: Ptr = BitTwiddling.OffsetPtr[toP, toT.class.super.SelectorOffset[toT, sel]];
fsr.ewc.super.Transduce[
fromS: fromS,
fromT: fsr.ewt,
toT: toT.class.super.SubType[toT, sel],
fromP: subFrom,
toP: subTo];
toT _ toT;
ENDLOOP;
toT _ toT;
};

FixSeqInitQ: PROC [rwt: RoseWireType, p: Ptr, cap: Strength] = TRUSTED {
fsr: FixSeqRep = NARROW[rwt.class.classData];
FOR i: NAT IN [0 .. fsr.length) DO
subType: RoseWireType = fsr.ewt;
subType.class.super.InitQ[
subType,
BitTwiddling.OffsetPtr[p, Suboff[fsr, i]],
cap];
cap _ cap;
ENDLOOP;
cap _ cap;
};

FixSeqInitUD: PROC [rwt: RoseWireType, p: Ptr, cap: Strength] RETURNS [isInput: BOOL] = TRUSTED {
fsr: FixSeqRep = NARROW[rwt.class.classData];
isInput _ TRUE;
FOR i: NAT IN [0 .. fsr.length) DO
subType: RoseWireType = fsr.ewt;
subInput: BOOL _ subType.class.super.InitUD[
subType,
BitTwiddling.OffsetPtr[p, Suboff[fsr, i]],
cap];
isInput _ isInput AND subInput;
ENDLOOP;
cap _ cap;
};

FixSeqComputeLevel: PROC [rwt: RoseWireType, p: Ptr, xPhobic: BOOL] RETURNS [delay: BOOL] = TRUSTED {
fsr: FixSeqRep = NARROW[rwt.class.classData];
delay _ FALSE;
FOR i: NAT IN [0 .. fsr.length) DO
subType: RoseWireType = fsr.ewt;
subDelay: BOOL _ subType.class.super.ComputeLevel[
subType,
BitTwiddling.OffsetPtr[p, Suboff[fsr, i]],
xPhobic];
delay _ delay OR subDelay;
ENDLOOP;
xPhobic _ xPhobic;
};

vanillaFormat: Format _ NEW [FormatRep _ [
FormatValue: RecursivelyFormatValue,
ParseValue: RecursivelyParseValue,
MaxWidth: RecursivelyMaxWidth,
key: "vanilla"]];

RecursivelyFormatValue: PROC [rwt: RoseWireType, f: Format, p: Ptr] RETURNS [r: ROPE] = {
fsr: FixSeqRep = NARROW[rwt.class.classData];
to: STREAM = IO.ROS[];
to.PutRope["["];
FOR i: NAT IN [0 .. fsr.length) DO
sf: Format = fsr.eltDefaultFormat;
IF i # 0 THEN to.PutRope[" "];
to.PutRope[sf.FormatValue[
fsr.ewt,
sf,
BitTwiddling.OffsetPtr[p, Suboff[fsr, i]]
]];
ENDLOOP;
to.PutRope["]"];
r _ to.RopeFromROS[];
};

RecursivelyParseValue: PROC [rwt: RoseWireType, f: Format, p: Ptr, s: STREAM] RETURNS [ok: BOOL] = {
ENABLE IO.Error, IO.EndOfStream => {ok _ FALSE; CONTINUE};
fsr: FixSeqRep = NARROW[rwt.class.classData];
Consume: PROC [goal: ROPE] = {
toke: ROPE = s.GetTokenRope[WireValBreak].token;
IF NOT toke.Equal[goal] THEN IO.Error[SyntaxError, s];
};
ok _ TRUE;
Consume["["];
FOR i: NAT IN [0 .. fsr.length) DO
sf: Format = fsr.eltDefaultFormat;
IF i # 0 THEN [] _ s.SkipWhitespace[];
IF
NOT sf.ParseValue[
fsr.ewt,
sf,
BitTwiddling.OffsetPtr[p, Suboff[fsr, i]],
s
]
THEN RETURN [FALSE];
ENDLOOP;
Consume["]"];
};

RecursivelyMaxWidth: PROC [rwt: RoseWireType, fmt: Format, font: VFonts.Font] RETURNS [max: INT] = {
fsr: FixSeqRep = NARROW[rwt.class.classData];
AddRope: PROC [r: ROPE, times: NAT _ 1] = {
max _ max + Real.Round[times * ImagerFont.RopeWidth[font, r].x];
};
IF fsr.vanillaMaxWidthFont = font THEN RETURN [fsr.vanillaMaxWidth];
fsr.vanillaMaxWidthFont _ font;
max _ 0;
AddRope["[]", 1];
AddRope[" ", fsr.length-1];
max _ max + fsr.length * fsr.eltDefaultFormat.MaxWidth[
fsr.ewt,
fsr.eltDefaultFormat,
font
];
fsr.vanillaMaxWidth _ max;
};

Start: PROC = {
FOR wf: WireFlavor IN WireFlavor DO
fixSeqSuperClasses[wf] _ NEW[RoseWireSuperClassRec _ [
GetType: FixSeqGetType,
ListFormats: FixSeqListFormats,
GetFormat: FixSeqGetFormat,
SelectorOffset: FixSeqSelectorOffset,
SubType: FixSeqSubType,
SubClass: FixSeqSubClass,
Bits: FixSeqBits,
MesaRepresentation: FixSeqMesaRepresentation,
MesaRepAux: FixSeqMesaRepAux,
flavor: wf,
Initialize: FixSeqInitialize,
Transduce: FixSeqTransduce,
InitQ: FixSeqInitQ,
InitUD: FixSeqInitUD,
ComputeLevel: FixSeqComputeLevel
]];
ENDLOOP;
};

Start[];

END.
°RoseFixedSequenceImpl.mesa
Copyright c 1985 by Xerox Corporation.  All rights reserved.
Barth, September 5, 1985 6:37:22 pm PDT
Spreitzer, October 1, 1985 6:31:31 pm PDT
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