
    <<Pass1.mesa>>
        <<Copyright © 1985 by Xerox Corporation.  All rights reserved.>>
        <<Satterthwaite, November 4, 1985 11:21:49 am PST>>
        <<Maxwell, August 1, 1983 3:01 pm>>
        <<Paul Rovner, September 7, 1983 3:24 pm>>
        <<Russ Atkinson (RRA) March 6, 1985 10:32:59 pm PST>>

    DIRECTORY
        Alloc: TYPE USING [Notifier, AddNotify, DropNotify],
        BcdDefs: TYPE USING [Link, ProcIndex, NullModule],
        ComData: TYPE USING [bodyIndex, idANY, idATOM, idBOOL, idCARDINAL, idCHAR, idINT, idLOCK, idREAL, idSTRING, idTEXT, idUNWIND, 
        nErrors, outerCtx, seAnon, sourceTokens, table, textIndex, tC0, tC1, typeATOM, typeAtomRecord, typeBOOL, typeCARDINAL, 
        typeCHAR, typeCONDITION, typeINT, typeLOCK, typeREAL, typeRefANY, typeListANY, typeSTRING, typeStringBody],
        CompilerUtil: TYPE USING [AcquireStream, ReleaseStream],
        ConvertUnsafe: TYPE USING [SubString],
        IO: TYPE USING [STREAM],
        LiteralOps: TYPE USING [Find],
        SourceMap: TYPE USING [Cons],
        P1: TYPE USING [InstallParseTable, Parse],
        Symbols: TYPE USING [Base, BitAddress, ByteLength, WordLength, SERecord, Name, Type, ISEIndex, CSEIndex, RecordSEIndex, CTXIndex, 
        codeANY, codeINT, codeCHAR, typeANY, typeTYPE, nullName, ISENull, RecordSENull, CTXNull, CBTNull, lZ, ctxType, seType],
        SymbolOps: TYPE USING [EnterExtension, EnterString, FillCtxSe, NewCtx, MakeNonCtxSe, MakeSeChain, NextSe, SetSeLink],
        Tree: TYPE USING [Link, NullIndex];

    Pass1: PROGRAM
        IMPORTS Alloc, CompilerUtil, LiteralOps, P1, SourceMap, SymbolOps, dataPtr: ComData
        EXPORTS CompilerUtil, P1 = {
        OPEN SymbolOps, Symbols;

        <<symbol table bases>>

            seb: Symbols.Base;    -- semantic entry base
            ctxb: Symbols.Base;    -- context table base

            P1Notify: Alloc.Notifier = {seb _ base[seType]; ctxb _ base[ctxType]};


        <<initialization of parsing tables>>

            InstallParseTables: PUBLIC PROC[table: LONG POINTER] = {
                P1.InstallParseTable[table]};


        <<construction of predeclared symbols>>

            SubString: TYPE = ConvertUnsafe.SubString;

            MakeBasicType: PROC[code: [0..16), ordered: BOOL, nBits: CARDINAL]
                RETURNS [sei: CSEIndex] = {
                sei _ MakeNonCtxSe[SERecord.cons.basic.SIZE];
                seb[sei] _ [mark3: TRUE, mark4: TRUE,
                    body: cons[basic[ordered:ordered, code:code, length:nBits]]];
                RETURN};

            MakeRecordType: PROC[nBits: CARDINAL, default, refField: BOOL_FALSE]
                RETURNS [rSei: RecordSEIndex] = {
                rSei _ LOOPHOLE[MakeNonCtxSe[SERecord.cons.record.notLinked.SIZE]];
                seb[rSei] _ [mark3: TRUE, mark4: TRUE,
                    body: cons[record[
                        machineDep: TRUE,
                        argument: FALSE,  monitored: FALSE, painted: TRUE,
                        hints: [
                            comparable: FALSE, assignable: FALSE,
                            variant: FALSE, unifield: FALSE, privateFields: FALSE,
                            refField: refField, default: default, voidable: ~refField AND ~default],
                        fieldCtx: NewCtx[lZ],
                        length: nBits,
                        linkPart: notLinked[]]]];
                RETURN};

            MakeRefType: PROC[refType: Type, counted, list: BOOL_FALSE]
                RETURNS [sei: CSEIndex] = {
                sei _ MakeNonCtxSe[SERecord.cons.ref.SIZE];
                seb[sei] _ [mark3: TRUE, mark4: TRUE,
                    body: cons[ref[
                        counted: counted,
                        var: FALSE,
                        readOnly: FALSE, ordered: FALSE, list: list, basing: FALSE,
                        refType: refType]]];
                RETURN};

            MakeLongType: PROC[rangeType: Type] RETURNS[sei: CSEIndex] = {
                sei _ MakeNonCtxSe[SERecord.cons.long.SIZE];
                seb[sei] _ [mark3: TRUE, mark4: TRUE, body: cons[long[rangeType: rangeType]]];
                RETURN};

            MakeSubrangeType: PROC[origin: INTEGER, range: CARDINAL, empty: BOOL]
                RETURNS [sei: CSEIndex] = {
                sei _ MakeNonCtxSe[SERecord.cons.subrange.SIZE];
                seb[sei] _ [mark3: TRUE, mark4: TRUE,
                    body: cons[subrange[
                        filled: TRUE, empty: empty,
                        rangeType: dataPtr.idINT,
                        origin: origin,  range: range]]];
                RETURN};


            SetIdAttr: PROC[sei: ISEIndex, const: BOOL] = {
                seb[sei].immutable _ seb[sei].constant _ const;
                seb[sei].extended _ seb[sei].public _ seb[sei].linkSpace _ FALSE;
                seb[sei].mark3 _ seb[sei].mark4 _ TRUE};

            FillVariable: PROC[
                sei: ISEIndex, name: STRING, type: Type, offset: BitAddress, nBits: CARDINAL] = {
                desc: SubString;
                hash: Name;
                IF name # NIL THEN {
                    desc _ [base:name, offset:0, length:name.length]; hash _ EnterString[desc]}
                ELSE hash _ nullName;
                FillCtxSe[sei, hash, FALSE];
                seb[sei].idType _ type;  seb[sei].idValue _ offset;  seb[sei].idInfo _ nBits;
                SetIdAttr[sei, FALSE]};

            FillConstant: PROC[sei: ISEIndex, name: STRING, type: Type, value: WORD] = {
                desc: SubString _ [base:name, offset:0, length:name.length];
                FillCtxSe[sei, EnterString[desc], FALSE];
                seb[sei].idType _ type;  seb[sei].idInfo _ 0;  seb[sei].idValue _ value;
                SetIdAttr[sei, TRUE]};

            FillXferConstant: PROC[
                  sei: ISEIndex, name: STRING, type: Type, epN: BcdDefs.ProcIndex] = {
                desc: SubString _ [base:name, offset:0, length:name.length];
                FillCtxSe[sei, EnterString[desc], FALSE];
                seb[sei].idType _ type;  seb[sei].idInfo _ CBTNull;
                seb[sei].idValue _ BcdDefs.Link[procedure[gfi: BcdDefs.NullModule, ep: epN, tag: TRUE]];
                SetIdAttr[sei, TRUE]};

            FillNamedType: PROC[sei: ISEIndex, s: STRING, type: Type] = {
                desc: SubString _ [base:s, offset:0, length:s.length];
                FillCtxSe[sei, EnterString[desc], FALSE];  SetIdAttr[sei, TRUE];
                seb[sei].idType _ typeTYPE;  seb[sei].idInfo _ type;  seb[sei].idValue _ Tree.NullIndex;
                SetIdAttr[sei, TRUE]};

            MakeTreeLiteral: PROC[val: WORD] RETURNS[Tree.Link] = {
                RETURN[[literal[LiteralOps.Find[val]]]]};


            nOuterSymbols: NAT = 20;    -- number of predeclared ids (outer level only)
            nExtraSymbols: NAT = 3;        -- number of new predeclared ids


            PrefillSymbols: PUBLIC PROC = { 
                OPEN dataPtr;
                tSei: CSEIndex;
                rSei: RecordSEIndex;
                tCtx: CTXIndex;
                sei, seChain: ISEIndex;

                outerChain: ISEIndex;
                NextOuterSe: PROC RETURNS [next: ISEIndex] = {
                    IF outerChain = ISENull THEN ERROR;
                    next _ outerChain;  outerChain _ NextSe[outerChain];  RETURN};

                idNAT: ISEIndex;
                (dataPtr.table).AddNotify[P1Notify];
                tSei _ MakeBasicType[codeANY, TRUE, WordLength];    -- guaranteed position
                outerCtx _ NewCtx[lZ];
                outerChain _ ctxb[outerCtx].seList _ MakeSeChain[outerCtx, nOuterSymbols, FALSE];
                <<make some constants>>
                    {tC0 _ MakeTreeLiteral[0]; tC1 _ MakeTreeLiteral[1]};

                idANY _ NextOuterSe[];
                    FillNamedType[idANY, "UNSPECIFIED"L, tSei];
                    IF tSei # typeANY THEN ERROR;
                idINT _ NextOuterSe[];  typeINT _ MakeBasicType[codeINT, TRUE, WordLength];
                    FillNamedType[idINT, "INTEGER"L, typeINT];
                idCHAR _ NextOuterSe[];  typeCHAR _ MakeBasicType[codeCHAR, TRUE, ByteLength];
                    FillNamedType[idCHAR, "CHARACTER"L, typeCHAR];
                idBOOL _ NextOuterSe[];
                    typeBOOL _ MakeNonCtxSe[SERecord.cons.enumerated.SIZE];
                    tCtx _ NewCtx[lZ];
                    seb[typeBOOL] _ [mark3: TRUE, mark4: TRUE,
                        body: cons[enumerated[
                            ordered: TRUE, machineDep: TRUE, sparse: FALSE, unpainted: FALSE,
                            valueCtx: tCtx, empty: FALSE, nValues: 2]]];
                    ctxb[tCtx].seList _ seChain _ MakeSeChain[tCtx, 2, FALSE];
                    FillConstant[seChain, "FALSE"L, idBOOL, 0];  seChain _ NextSe[seChain];
                    FillConstant[seChain, "TRUE"L, idBOOL, 1];
                    FillNamedType[idBOOL, "BOOLEAN"L, typeBOOL];
                idCARDINAL _ NextOuterSe[];
                    typeCARDINAL _ MakeSubrangeType[0, 177777b, FALSE];
                    FillNamedType[idCARDINAL, "CARDINAL"L, typeCARDINAL];
                FillNamedType[NextOuterSe[], "WORD"L, typeCARDINAL];
                idREAL _ NextOuterSe[];
                    typeREAL _ MakeNonCtxSe[SERecord.cons.real.SIZE];
                    seb[typeREAL] _ [mark3:TRUE, mark4:TRUE, body:cons[real[rangeType:idINT]]];
                    FillNamedType[idREAL, "REAL"L, typeREAL];
                idNAT _ sei _ NextOuterSe[];    -- NAT
                    FillNamedType[sei, "NAT"L, MakeSubrangeType[0, 77777b, FALSE]];
                idTEXT _ NextOuterSe[];
                    rSei _ MakeRecordType[nBits:2*WordLength, default:TRUE];
                    seb[rSei].hints.variant _ TRUE;
                    tCtx _ seb[rSei].fieldCtx; ctxb[tCtx].seList _ seChain _ MakeSeChain[tCtx, 2, FALSE];
                    FillVariable[seChain, "length"L, idNAT, [wd:0, bd:0], WordLength];
                        EnterExtension[seChain, default, tC0];
                    seChain _ NextSe[seChain];
                        BEGIN
                        tag: ISEIndex = MakeSeChain[CTXNull, 1, FALSE];
                        seqSei: CSEIndex = MakeNonCtxSe[SERecord.cons.sequence.SIZE];
                        FillVariable[tag, "maxLength"L, idNAT, [wd:1, bd:0], WordLength];
                            seb[tag].immutable _ TRUE;
                        seb[seqSei] _ [mark3: TRUE, mark4: TRUE,
                            body: cons[sequence[
                                packed: TRUE, machineDep: TRUE,
                                controlled: TRUE, tagSei: tag,
                                componentType: idCHAR]]];
                        FillVariable[seChain, "text"L, seqSei, [wd:1, bd:0], WordLength];
                        END;
                    FillNamedType[idTEXT, "TEXT"L, rSei];
                idSTRING _ NextOuterSe[];
                sei _ NextOuterSe[];    -- StringBody
                    typeStringBody _ rSei _ MakeRecordType[nBits:2*WordLength, default:TRUE];
                    seb[rSei].hints.assignable _ seb[rSei].hints.voidable _ TRUE;   -- compatibility
                    tCtx _ seb[rSei].fieldCtx; ctxb[tCtx].seList _ seChain _ MakeSeChain[tCtx, 3, FALSE];
                    FillVariable[seChain, "length"L, idCARDINAL, [wd:0, bd:0], WordLength];
                        EnterExtension[seChain, default, tC0];
                    seChain _ NextSe[seChain];
                    FillVariable[seChain, "maxlength"L, idCARDINAL, [wd:1, bd:0], WordLength];
                        seb[seChain].immutable _ TRUE;
                    seChain _ NextSe[seChain];
                    tSei _ MakeNonCtxSe[SERecord.cons.array.SIZE];
                    seb[tSei] _ [mark3: TRUE, mark4: TRUE,
                        body: cons[array[
                            packed: TRUE,
                            indexType: MakeSubrangeType[0, 0, TRUE],
                            componentType: idCHAR]]];
                    FillVariable[seChain, "text"L, tSei, [wd:2, bd:0], 0];
                    FillNamedType[sei, "StringBody"L, rSei];  typeSTRING _ MakeRefType[sei];
                    FillNamedType[idSTRING, "STRING"L, typeSTRING];
                idLOCK _ NextOuterSe[];
                    rSei _ MakeRecordType[nBits:WordLength, default:TRUE];
                    tCtx _ seb[rSei].fieldCtx; ctxb[tCtx].seList _ seChain _ MakeSeChain[tCtx, 1, FALSE];
                    FillVariable[seChain, NIL, idANY, [wd:0, bd:0], WordLength];
                        EnterExtension[seChain, default, MakeTreeLiteral[100000b]];
                    FillNamedType[idLOCK, "MONITORLOCK"L, rSei];  typeLOCK _ rSei;
                sei _ NextOuterSe[];    -- CONDITION
                    rSei _ MakeRecordType[nBits:2*WordLength, default:TRUE];
                    typeCONDITION _ rSei;
                    tCtx _ seb[rSei].fieldCtx; ctxb[tCtx].seList _ seChain _ MakeSeChain[tCtx, 2, FALSE];
                    FillVariable[seChain, "timeout"L, idCARDINAL, [wd:1, bd:0], WordLength];
                        EnterExtension[seChain, default, tC0];
                    seChain _ NextSe[seChain];
                    FillVariable[seChain, NIL, idANY, [wd:0, bd:0], WordLength];
                        EnterExtension[seChain, default, tC0];
                    FillNamedType[sei, "CONDITION"L, rSei];  typeCONDITION _ rSei;
                sei _ NextOuterSe[];    -- MDSZone
                    tSei _ MakeNonCtxSe[SERecord.cons.zone.SIZE];
                    seb[tSei] _ [mark3:TRUE, mark4:TRUE, body:cons[zone[counted:FALSE, mds:TRUE]]];
                    FillNamedType[sei, "MDSZone"L, tSei];
                idATOM _ sei _ NextOuterSe[];
                    typeAtomRecord _ tSei _ MakeNonCtxSe[SERecord.cons.opaque.SIZE];
                    seb[tSei] _ [mark3: TRUE, mark4: TRUE,
                        body: cons[opaque[
                            id: NextSe[sei],
                            length: 0, lengthKnown: FALSE]]];
                    tSei _ MakeRefType[refType: tSei, counted: TRUE];
                    typeATOM _ MakeLongType[tSei];
                    FillNamedType[idATOM, "ATOM"L, typeATOM];
                seAnon _ NextOuterSe[];
                    FillVariable[seAnon, "?"L,  typeANY, [wd:0, bd:0], WordLength];
                FillConstant[NextOuterSe[], "TRUE"L, idBOOL, 1];    -- TRUE
                FillConstant[NextOuterSe[], "FALSE"L, idBOOL, 0];    -- FALSE
                idUNWIND _ NextOuterSe[];
                    tSei _ MakeNonCtxSe[SERecord.cons.transfer.SIZE];
                    seb[tSei] _ [mark3: TRUE, mark4: TRUE,
                        body: cons[transfer[
                            mode: error, safe: FALSE,
                            typeIn: RecordSENull, typeOut: RecordSENull]]];
                    FillXferConstant[idUNWIND, "UNWIND"L, tSei, 1];
                FillXferConstant[NextOuterSe[], "ABORTED"L, tSei, 2];
                IF outerChain # ISENull THEN ERROR;

                <<REF ANY>>
                    tSei _ MakeNonCtxSe[SERecord.cons.any.SIZE];
                    seb[tSei] _ [mark3: TRUE, mark4: TRUE, body: cons[any[]]];
                    typeRefANY _ MakeLongType[MakeRefType[refType: tSei, counted: TRUE]];
                <<LIST OF REF ANY>>
                    rSei _ MakeRecordType[nBits: 2*(2*WordLength), refField: TRUE, default: TRUE];
                    typeListANY _ MakeLongType[MakeRefType[refType: rSei, counted: TRUE, list: TRUE]];
                    seb[rSei].painted _ FALSE;
                    seb[rSei].hints.comparable _ seb[rSei].hints.assignable _ TRUE;
                    seb[rSei].hints.refField _ TRUE;
                    tCtx _ seb[rSei].fieldCtx; ctxb[tCtx].seList _ seChain _ MakeSeChain[tCtx, 2, FALSE];
                    FillVariable[seChain, "first"L, typeRefANY, [wd:0, bd:0], 2*WordLength];
                    seChain _ NextSe[seChain];
                    FillVariable[seChain, "rest"L, typeListANY, [wd:2, bd:0], 2*WordLength];

                <<predeclared types added for Cedar>>
                    outerChain _ ctxb[outerCtx].seList _ MakeSeChain[outerCtx, nExtraSymbols, TRUE];
                    FillNamedType[NextOuterSe[], "BOOL"L, idBOOL];
                    FillNamedType[NextOuterSe[], "CHAR"L, idCHAR];
                    sei _ NextOuterSe[];    -- INT
                        tSei _ MakeLongType[idINT];
                        FillNamedType[sei, "INT"L, tSei];
                    SetSeLink[sei, idANY];
                    IF outerChain # ISENull THEN ERROR;

                    (dataPtr.table).DropNotify[P1Notify]};


            IdOfFirst: PUBLIC PROC RETURNS[Name] = {RETURN[HashForId["first"L]]};

            IdOfLock: PUBLIC PROC RETURNS[Name] = {RETURN[HashForId["LOCK"L]]};

            IdOfRest: PUBLIC PROC RETURNS[Name] = {RETURN[HashForId["rest"L]]};

            HashForId: PROC[id: STRING] RETURNS[Name] = {
                desc: SubString _ [base:id, offset:0, length:id.length];
                RETURN[EnterString[desc]]};


        <<pass 1 control>>

            P1Unit: PUBLIC PROC RETURNS[success: BOOL] = {
                source: IO.STREAM _ CompilerUtil.AcquireStream[$source];
                dataPtr.textIndex _ SourceMap.Cons[0];  dataPtr.bodyIndex _ CBTNull;
                [complete:success, nTokens:dataPtr.sourceTokens, nErrors:dataPtr.nErrors] _
                    P1.Parse[source, Logger, TRUE];
                EnterHashMark[];
                CompilerUtil.ReleaseStream[$source]};

            Logger: PROC[inner: PROC[log: IO.STREAM]] = {
                log: IO.STREAM _ CompilerUtil.AcquireStream[$log];
                inner[log];
                CompilerUtil.ReleaseStream[$log]};

            EnterHashMark: PROC = INLINE {
                <<marks end of symbols from source file in hash table>>
                desc: SubString _ [base:"  "L, offset:1, length:0];
                [] _ EnterString[desc]};

        }.