DIRECTORY
Alloc: TYPE USING [Notifier, Top],
BcdDefs: TYPE USING [BCD, BcdBase, CodeDesc, EVHandle, EVIndex, EVRecord, EXPRecord, FTIndex, FTRecord, IMPIndex, IMPRecord, Link, LFIndex, ModuleIndex, MTHandle, MTRecord, Namee, NameRecord, NameString, NTRecord, PackedString, ProcIndex, RefLitIndex, RFIndex, SGIndex, SGRecord, TFIndex, TMRecord, TypeIndex, TYPIndex, TYPRecord, VarIndex, VersionID, CTNull, EVNull, FTSelf, LFNull, RFNull, TFNull, NullLink, NullName, MaxNMi, PageSize, ProcLimit, VarLimit],
ComData: TYPE USING [bcdSeg, codeSeg, compilerVersion, fixupLoc, importCtx, interface, linkCount, mainCtx, moduleCtx, mtRoot, mtRootSize, nBodies, nSigCodes, objectVersion, ownSymbols, pattern, source, switches, symSeg, table, textIndex],
CompilerUtil: TYPE USING [AppendBCDString, AppendBCDWord, AppendBCDWords, EndBCD, FillBCDPage, ReadBCDIndex, ReadBCDOffset, RTTableOut, StartBCD, UpdateBCDWords],
ConvertUnsafe: TYPE USING [EqualSubStrings, AppendRope, SubString],
Copier: TYPE USING [FreeSymbolTable, GetSymbolTable, MapSymbols, UnmapSymbols],
Log: TYPE USING [ErrorN, ErrorSei, ErrorType, WarningSei, WarningRope, WarningSubString],
P4: TYPE USING [ownGfi, DefaultBasicOps, OperandStruct],
Pass4: TYPE USING [resident],
RefText: TYPE USING [Append],
ReplOps: TYPE USING [MatchedBodies, Unmatched],
Rope: TYPE USING [Length],
SourceMap: TYPE USING [Loc],
Symbols: TYPE USING [bodyType, ctxType, mdType, seType, Base, Name, Type, ISEIndex, CSEIndex, RecordSEIndex, CTXIndex, IncludedCTXIndex, BitAddress, Linkage, MDRecord, MDIndex, BTIndex, nullName, ISENull, CTXNull, MDNull, BTNull, nullFileIndex, OwnMdi, RootBti, typeTYPE],
SymbolOps: TYPE USING [FindString, FirstCtxSe, NextSe, SearchContext, SubStringForName, TypeForm, UnderType, XferMode],
SymbolTable: TYPE USING [Base],
SymLiteralOps: TYPE USING [RefLitItem, DescribeRefLits, DescribeTypes, EnumerateRefLits, EnumerateTypes, UTypeId, TypeIndex],
Tree: TYPE USING [Base, Index, Link, Map, Scan, NullIndex, treeType],
TreeOps: TYPE USING [GetNode, GetSe, ListLength, ScanList],
Types: TYPE USING [SymbolTableBase, Assignable, Equivalent],
UnsafeStorage: TYPE USING [GetSystemUZone];

Pass4B: PROGRAM
IMPORTS Alloc, CompilerUtil, ConvertUnsafe, Copier, Log, P4, ReplOps, RefText, Rope,  SymbolOps, SymLiteralOps, TreeOps, Types, dataPtr: ComData, passPtr: Pass4, UnsafeStorage
EXPORTS P4 = {
OPEN SymbolOps, Symbols;

tb: Tree.Base;	-- tree base address (local copy)
seb: Symbols.Base;	-- se table base address (local copy)
ctxb: Symbols.Base;	-- context table base address (local copy)
mdb: Symbols.Base;	-- body table base address (local copy)
bb: Symbols.Base;	-- body table base address (local copy)

BCDNotify: PUBLIC Alloc.Notifier = {
tb _ base[Tree.treeType];
seb _ base[seType];  ctxb _ base[ctxType];  mdb _ base[mdType];
bb _ base[bodyType]};



bcdHeader: BcdDefs.BcdBase;  -- initialized in START code, below
BcdHeaderPage: CARDINAL = 1;		-- page 0 is reserved
bcdOffset, mtOffset: CARDINAL;

nString: BcdDefs.NameString;
nStringREFTEXT: REF TEXT;  -- NOTE SHARING with nString

firstPorted: MDIndex = MDIndex.FIRST + MDRecord.SIZE;
lastPorted: MDIndex;	-- im/exported files in [firstPorted..lastPorted)

evList: BcdDefs.EVHandle;  -- initialized in START code, below

indirectMTRecord: BcdDefs.MTHandle;  -- initialized in START code, below
multipleMTRecord: BcdDefs.MTHandle;  -- initialized in START code, below



ModuleIndex: TYPE = BcdDefs.ModuleIndex;
ProcIndex: TYPE = BcdDefs.ProcIndex;
ProcLimit: CARDINAL = BcdDefs.ProcLimit;
VarLimit: CARDINAL = BcdDefs.VarLimit;
maxEVLength: CARDINAL = BcdDefs.MaxNMi*(BcdDefs.VarIndex.LAST+1) - 1;
BcdLink: TYPE = BcdDefs.Link;

ownGfi: ModuleIndex = P4.ownGfi;


GFSlots: PROC[epMax: NAT] RETURNS[nGfi: NAT] = {
nGfi _ epMax/ProcLimit + 1; RETURN};

MakeEPLink: PUBLIC PROC[ep: CARDINAL, gfi: ModuleIndex] RETURNS[BcdLink] = {
RETURN[[procedure[tag: TRUE, ep: ep MOD ProcLimit, gfi: gfi + ep/ProcLimit]]]};

MakeFrameLink: PROC[ep: CARDINAL, gfi: ModuleIndex] RETURNS[BcdLink] = {
RETURN[[variable[vtag: var, var: ep MOD VarLimit, vgfi: gfi + ep/VarLimit]]]};

MakeTypeLink: PROC[index: BcdDefs.TYPIndex] RETURNS[BcdLink] = INLINE {
RETURN[[type[typeID: index, type: TRUE, proc: FALSE]]]};


MdiForCtx: PROC[ctx: CTXIndex] RETURNS[MDIndex] = {
RETURN[WITH c: ctxb[ctx] SELECT FROM
included => c.module,
imported => ctxb[c.includeLink].module,
ENDCASE => OwnMdi]
};

PortedCtx: PROC[ctx: CTXIndex] RETURNS[BcdDefs.FTIndex] = {
RETURN[PortedFile[MdiForCtx[ctx]]]};

PortedFile: PROC[mdi: MDIndex] RETURNS[fti: BcdDefs.FTIndex] = {
n: CARDINAL;
IF mdi = OwnMdi THEN fti _ BcdDefs.FTSelf
ELSE {
IF mdi IN [firstPorted .. lastPorted) THEN
n _ LOOPHOLE[mdi-firstPorted, CARDINAL]/MDRecord.SIZE
ELSE {
n _ LOOPHOLE[lastPorted-firstPorted, CARDINAL]/MDRecord.SIZE;
SwapMdi[mdi, lastPorted];
lastPorted _ lastPorted + MDRecord.SIZE};
fti _ LOOPHOLE[n*BcdDefs.FTRecord.SIZE]};
RETURN};

SwapMdi: PROC[mdi1, mdi2: MDIndex] = {
IF mdi1 # mdi2 THEN {
ctx: IncludedCTXIndex;
t: MDRecord;
FOR ctx _ mdb[mdi1].ctx, ctxb[ctx].chain UNTIL ctx = CTXNull DO
ctxb[ctx].module _ mdi2 ENDLOOP;
FOR ctx _ mdb[mdi2].ctx, ctxb[ctx].chain UNTIL ctx = CTXNull DO
ctxb[ctx].module _ mdi1 ENDLOOP;
t _ mdb[mdi1];  mdb[mdi1] _ mdb[mdi2];  mdb[mdi2] _ t}
};

EnterId: PROC[id: ConvertUnsafe.SubString, ignoreCase: BOOL]
  RETURNS[BcdDefs.NameRecord] = {
i: CARDINAL;
s: ConvertUnsafe.SubString;
i _ 0;  s.base _ @nString.string;
UNTIL i = nString.string.length DO
s.offset _ i _ i+1;  s.length _ nString.size[i];
IF id.EqualSubStrings[s2: s, case: ~ignoreCase] THEN EXIT;
i _ i + s.length;
REPEAT
FINISHED => {
IF nString.string.length + (id.length+1) > nString.string.maxlength THEN {
t: REF TEXT _ NEW[TEXT[nString.string.maxlength + MAX[(id.length+1), 512]]];
t _ RefText.Append[t, nStringREFTEXT];
nStringREFTEXT _ t;
nString _ LOOPHOLE[nStringREFTEXT, BcdDefs.NameString];
};
i _ nString.string.length _ nString.string.length + 1;
nString.size[i] _ id.length;
FOR j: CARDINAL IN [0..id.length) DO
nString.string[i+j] _ id.base[id.offset+j]
ENDLOOP;
nString.string.length _ i + id.length};
ENDLOOP;
RETURN[[i]]};

EnterSymbolId: PROC[sei: ISEIndex] RETURNS[BcdDefs.NameRecord] = {
s: ConvertUnsafe.SubString;
s _ SubStringForName[seb[sei].hash];
RETURN[EnterId[s, FALSE]]};

EnterFileId: PROC[mdi: MDIndex] RETURNS[BcdDefs.NameRecord] = {
s: ConvertUnsafe.SubString;
extLength: CARDINAL = (".bcd"L).length;
s _ SubStringForName[mdb[mdi].fileId];
IF s.base[s.offset+s.length-1] = '. THEN s.length _ s.length - 1;
IF s.length > extLength THEN {
t: ConvertUnsafe.SubString _ [
base: s.base, offset: s.offset+s.length-extLength, length: extLength];
ext: ConvertUnsafe.SubString _ [base:".bcd"L, offset:0, length:extLength];
IF t.EqualSubStrings[s2: ext, case: FALSE] THEN s.length _ s.length - extLength};
RETURN[EnterId[s, TRUE]]};



ProcessDirectory: PUBLIC Tree.Scan = {

DirectoryItem: Tree.Scan = {
node: Tree.Index = TreeOps.GetNode[t];
sei: ISEIndex = TreeOps.GetSe[tb[node].son[1]];
type: CSEIndex = UnderType[seb[sei].idType];
WITH t: seb[type] SELECT FROM
definition => [] _ PortedCtx[t.defCtx];
transfer => {
bti: BTIndex = seb[sei].idInfo;
IF bti # BTNull THEN [] _ PortedCtx[bb[bti].localCtx]};
ENDCASE
};

TreeOps.ScanList[t, DirectoryItem]};



ScanImports: PROC[action: PROC[ISEIndex]] = {
FOR sei: ISEIndex _ FirstCtxSe[dataPtr.importCtx], NextSe[sei] UNTIL sei = ISENull DO
action[sei] ENDLOOP
};

RelocateImports: PROC[ctx: CTXIndex, gfi: ModuleIndex] = {
FOR sei: ISEIndex _ FirstCtxSe[ctx], NextSe[sei] UNTIL sei = ISENull DO
IF ~seb[sei].constant THEN {
epN: CARDINAL = seb[sei].idValue;
seb[sei].idValue _ MakeEPLink[epN, gfi]};
ENDLOOP;
RETURN};

AssignImports: PUBLIC Tree.Scan = {
gfi: ModuleIndex;
saveIndex: SourceMap.Loc = dataPtr.textIndex;

ImportItem: PROC[sei: ISEIndex] = {
node: Tree.Index = seb[sei].idValue;
type: CSEIndex = UnderType[seb[sei].idType];
IF node # Tree.NullIndex THEN dataPtr.textIndex _ tb[node].info;
WITH t: seb[type] SELECT FROM
definition => {
IF ctxb[t.defCtx].seList = ISENull THEN Log.WarningSei[unusedImport, sei];
IF ~dataPtr.interface THEN RelocateImports[t.defCtx, gfi];
gfi _ gfi + (seb[sei].idInfo _ 4*t.nDummyGfi.q + t.nDummyGfi.r)};
ref => {
IF ~dataPtr.interface THEN seb[sei].idValue _ MakeEPLink[ep:0, gfi:gfi];
gfi _ gfi + 1};
ENDCASE;
seb[sei].mark4 _ TRUE};

dataPtr.mtRoot.gfi _ ownGfi;
dataPtr.mtRoot.ngfi _ GFSlots[MAX[dataPtr.nBodies, dataPtr.nSigCodes]-1];
gfi _ bcdHeader.firstdummy _ ownGfi + BcdDefs.MaxNMi;
ScanImports[ImportItem];
bcdHeader.nDummies _ gfi - bcdHeader.firstdummy;
dataPtr.textIndex _ saveIndex};



ProcessSymLiterals: PUBLIC PROC = {
offset, length: CARDINAL;
bcdHeader.rfOffset _ CompilerUtil.ReadBCDOffset[];
bcdHeader.lfLimit _ LOOPHOLE[bcdHeader.rfOffset - bcdHeader.lfOffset];
IF ~dataPtr.interface THEN {
rfi: BcdDefs.RefLitIndex _ [0];

AppendLitItem: PROC[SymLiteralOps.RefLitItem] = {
CompilerUtil.AppendBCDWords[@rfi, BcdDefs.RefLitIndex.SIZE];
rfi _ [rfi + 1]};

[offset, length] _ SymLiteralOps.DescribeRefLits[];
IF length # 0 THEN {
WITH m: dataPtr.mtRoot SELECT FROM
multiple => m.refLiterals _ BcdDefs.RFIndex.FIRST;
ENDCASE;
CompilerUtil.AppendBCDWord[offset];  CompilerUtil.AppendBCDWord[length];
SymLiteralOps.EnumerateRefLits[AppendLitItem]}
};
bcdHeader.tfOffset _ CompilerUtil.ReadBCDOffset[];
bcdHeader.rfLimit _ LOOPHOLE[bcdHeader.tfOffset - bcdHeader.rfOffset];
IF ~dataPtr.interface THEN {
tfi: BcdDefs.TypeIndex _ [0];

AppendTypeIndex: PROC[canonical: BOOL, type: Type] = {
CompilerUtil.AppendBCDWords[@tfi, BcdDefs.TypeIndex.SIZE];
tfi _ [tfi + 1]};

[offset, length] _ SymLiteralOps.DescribeTypes[];
IF length # 0 THEN {
WITH m: dataPtr.mtRoot SELECT FROM
multiple => m.types _ BcdDefs.TFIndex.FIRST;
ENDCASE;
CompilerUtil.AppendBCDWord[offset];  CompilerUtil.AppendBCDWord[length];
SymLiteralOps.EnumerateTypes[AppendTypeIndex]}
};
bcdHeader.tfLimit _ LOOPHOLE[CompilerUtil.ReadBCDOffset[] - bcdHeader.tfOffset]};



ProcessImports: PUBLIC Tree.Scan = {
nImports: CARDINAL;
impi: BcdDefs.IMPIndex;
nextGfi: ModuleIndex;
anyNamed: BOOL;

ProcessSei: PROC[sei, tSei: ISEIndex, implicit: BOOL] = {
type: CSEIndex = UnderType[seb[sei].idType];
entry: BcdDefs.IMPRecord _ [
name: EnterSymbolId[tSei],
port: interface,
namedInstance: seb[sei].hash # seb[tSei].hash,
file: ,
gfi: nextGfi, ngfi: ];
WITH t: seb[type] SELECT FROM
definition => {
entry.file _ PortedCtx[t.defCtx];  entry.ngfi _ seb[sei].idInfo;
nextGfi _ (seb[sei].idValue _ nextGfi) + seb[sei].idInfo};
ref => {
rType: RecordSEIndex = LOOPHOLE[UnderType[t.refType]];
entry.port _ module;
entry.file _ PortedCtx[seb[rType].fieldCtx];  entry.ngfi _ 1;
nextGfi _ nextGfi + 1};
ENDCASE;
nImports _ nImports + 1;
IF entry.namedInstance THEN anyNamed _ TRUE;
CompilerUtil.AppendBCDWords[@entry, BcdDefs.IMPRecord.SIZE]};

sei: ISEIndex;	-- updated by ImportItem

ImportItem: Tree.Scan = {
node: Tree.Index = TreeOps.GetNode[t];
ProcessSei[sei, TreeOps.GetSe[tb[node].son[2]], FALSE];
sei _ NextSe[sei]};

NameItem: Tree.Scan = {
node: Tree.Index = TreeOps.GetNode[t];
sei: ISEIndex = TreeOps.GetSe[tb[node].son[1]];
tSei: ISEIndex = TreeOps.GetSe[tb[node].son[2]];
entry: BcdDefs.NTRecord;
IF  seb[sei].hash # seb[tSei].hash THEN {
entry _ [name: EnterSymbolId[sei], item: BcdDefs.Namee[import[impi]]];
CompilerUtil.AppendBCDWords[@entry, BcdDefs.NTRecord.SIZE]};
impi _ impi + BcdDefs.IMPRecord.SIZE};

offset: CARDINAL;
bcdHeader.impOffset _ offset _ CompilerUtil.ReadBCDOffset[];
nImports _ 0;  impi _ BcdDefs.IMPIndex.FIRST;
nextGfi _ bcdHeader.firstdummy;  anyNamed _ FALSE;
sei _ FirstCtxSe[dataPtr.importCtx];
TreeOps.ScanList[t, ImportItem];
UNTIL sei = ISENull DO ProcessSei[sei, sei, TRUE]; sei _ NextSe[sei] ENDLOOP;
bcdHeader.nImports _ nImports;
bcdHeader.impLimit _ LOOPHOLE[CompilerUtil.ReadBCDOffset[]-offset];
bcdHeader.ntOffset _ offset _ CompilerUtil.ReadBCDOffset[];
IF anyNamed THEN TreeOps.ScanList[t, NameItem];	-- matches importCtx prefix
bcdHeader.ntLimit _ LOOPHOLE[CompilerUtil.ReadBCDOffset[]-offset]};



EnterEVOffset: PROC[offset: CARDINAL] RETURNS[index: CARDINAL] = {
IF offset = 0 THEN index _ 0
ELSE
FOR index IN [1 .. evList.length] DO
IF offset = evList.offsets[index] THEN EXIT;
REPEAT
FINISHED => {
index _ evList.length _ evList.length + 1;
IF index <= maxEVLength THEN evList.offsets[index] _ offset};
ENDLOOP;
RETURN};


TypeMap: TYPE = RECORD[SEQUENCE length: CARDINAL OF
RECORD[opaque: BcdDefs.TMRecord, concrete: BcdDefs.TYPRecord]];
typeMap: REF TypeMap;
mapIndex: CARDINAL;
typeIndex: BcdDefs.TYPIndex;

EnterType: PROC[mdi: MDIndex, offset: CARDINAL, sei: ISEIndex]
  RETURNS[typeId: BcdDefs.TYPIndex] = {
entry: BcdDefs.TYPRecord = MakeTypeId[sei];
IF typeMap = NIL OR mapIndex >= typeMap.length THEN AdjustTypeMap[8];
FOR i: CARDINAL IN [0..mapIndex) DO
IF typeMap[i].concrete = entry THEN GO TO matched;
REPEAT
matched => typeId _ typeMap[i].opaque.map;
FINISHED => {typeId _ typeIndex; typeIndex _ typeIndex + BcdDefs.TYPRecord.SIZE};
ENDLOOP;
typeMap[mapIndex] _ [
opaque: [version: mdb[mdi].stamp, offset: offset, map: typeId],
concrete: entry];
mapIndex _ mapIndex + 1;
RETURN};

MakeTypeId: PROC[id: ISEIndex] RETURNS[BcdDefs.TYPRecord] = {
sei: ISEIndex _ id;
next: Type;
mdi: MDIndex;
DO
next _ seb[sei].idInfo;
WITH seb[next] SELECT FROM
id => sei _ LOOPHOLE[next];
ENDCASE => EXIT;
ENDLOOP;
mdi _ MdiForCtx[seb[sei].idCtx];
RETURN[[id: [seb[sei].idValue], version: mdb[mdi].stamp]]};

AdjustTypeMap: PROC[delta: CARDINAL] = {
oldN: CARDINAL = IF typeMap = NIL THEN 0 ELSE typeMap.length;
newMap: REF TypeMap = NEW[TypeMap[oldN+delta]];
FOR i: CARDINAL IN [0 .. oldN) DO newMap[i] _ typeMap[i] ENDLOOP;
typeMap _ newMap};

WriteTypeTable: PROC = {
i, offset: CARDINAL;
next: BcdDefs.TYPIndex _ BcdDefs.TYPIndex.FIRST;
bcdHeader.typOffset _ offset _ CompilerUtil.ReadBCDOffset[];
FOR i IN [0 .. mapIndex) DO
FOR j: CARDINAL IN [0..i) DO
IF typeMap[i].opaque.map = typeMap[j].opaque.map THEN EXIT
REPEAT
FINISHED => {
CompilerUtil.AppendBCDWords[@typeMap[i].concrete, BcdDefs.TYPRecord.SIZE];
next _ next + BcdDefs.TYPRecord.SIZE};
ENDLOOP;
ENDLOOP;
bcdHeader.typLimit _ LOOPHOLE[CompilerUtil.ReadBCDOffset[]-offset];
bcdHeader.tmOffset _ offset _ CompilerUtil.ReadBCDOffset[];
FOR i IN [0 .. mapIndex) DO
CompilerUtil.AppendBCDWords[@typeMap[i].opaque, BcdDefs.TMRecord.SIZE];
ENDLOOP;
bcdHeader.tmLimit _ LOOPHOLE[CompilerUtil.ReadBCDOffset[]-offset]};


ExportId: Tree.Map = {
expType: CSEIndex = P4.OperandStruct[t];
ctx: IncludedCTXIndex;
iBase: Types.SymbolTableBase;
id, sei, iSei: ISEIndex;
epN: CARDINAL;
used: BOOL;
id _ TreeOps.GetSe[t];
WITH v: seb[expType] SELECT FROM
definition => {
ctx _ LOOPHOLE[v.defCtx];
iBase _ Copier.GetSymbolTable[ctxb[ctx].module];
IF iBase # NIL THEN {
BEGIN
header: BcdDefs.EXPRecord _ [
name: EnterSymbolId[id],
size: 0,
port: interface,
namedInstance: FALSE,
typeExported: FALSE,
file: PortedCtx[v.defCtx],
links: ];
FOR iSei _ iBase.FirstCtxSe[ctxb[ctx].map], iBase.NextSe[iSei] UNTIL iSei = ISENull DO
SELECT iBase.LinkMode[iSei] FROM
val, ref => header.size _ header.size + 1;
type => {header.typeExported _ TRUE; header.size _ header.size + 1};
ENDCASE;
ENDLOOP;
CompilerUtil.AppendBCDWords[@header, BcdDefs.EXPRecord.SIZE];
END;
used _ FALSE;  epN _ 0;
FOR iSei _ iBase.FirstCtxSe[ctxb[ctx].map], iBase.NextSe[iSei] UNTIL iSei = ISENull DO
mode: Linkage = iBase.LinkMode[iSei];
link: BcdLink _ BcdDefs.NullLink;
BEGIN
ss: ConvertUnsafe.SubString;
name: Name;
ss _ iBase.SubStringForName[iBase.seb[iSei].hash];
name _ FindString[ss];
IF name = nullName THEN sei _ ISENull
ELSE {
sei _ SearchContext[name, dataPtr.mainCtx];
IF sei = ISENull THEN sei _ SearchContext[name, dataPtr.moduleCtx]};
END;
IF sei # ISENull THEN {
public: BOOL = seb[sei].public;
type: CSEIndex = UnderType[seb[sei].idType];
iTarget: Type = iBase.seb[iSei].idType;
iType: CSEIndex = iBase.UnderType[iTarget];
SELECT mode FROM
$val => {
IF ~Types.Assignable[[iBase, iType], [dataPtr.ownSymbols, type]] THEN {
IF public THEN
Log.ErrorType[exportClash, [symbol[sei]], [iBase, iTarget]];
}
ELSE IF ~public AND seb[sei].idCtx = dataPtr.mainCtx THEN
Log.WarningSei[privateExport, sei];
IF public THEN {
IF ~seb[sei].constant OR seb[sei].extended THEN
Log.ErrorSei[varExport, sei];
link _ (IF XferMode[type] = $program
THEN MakeFrameLink[ep: EnterEVOffset[0], gfi: ownGfi]
ELSE seb[sei].idValue)}};
$ref => {
iVType: CSEIndex _ iType;
iConst: BOOL _ iBase.seb[iSei].immutable;
WITH t: iBase.seb[iType] SELECT FROM
ref =>
IF t.var THEN {
iVType _ iBase.UnderType[t.refType]; iConst _ t.readOnly}; 
ENDCASE;
IF ~Types.Equivalent[[iBase, iVType], [dataPtr.ownSymbols, type]] THEN {
IF public THEN
Log.ErrorType[exportClash, [symbol[sei]], [iBase, iTarget]]
}
ELSE IF ~public AND seb[sei].idCtx = dataPtr.mainCtx THEN
Log.WarningSei[privateExport, sei];
IF public THEN {
SELECT TRUE FROM
seb[sei].constant => Log.ErrorSei[varExport, sei];
seb[sei].immutable AND ~iConst => Log.ErrorSei[updateClash, sei];
ENDCASE;
link _ MakeFrameLink[
ep: EnterEVOffset[LOOPHOLE[seb[sei].idValue, BitAddress].wd],
gfi: ownGfi]}};
$type =>
IF type # typeTYPE OR TypeForm[sei] = $opaque THEN {
IF public THEN Log.ErrorSei[exportClash, sei]}
ELSE {
iValue: CSEIndex = iBase.UnderType[iSei];
IF (~public AND seb[sei].idCtx = dataPtr.mainCtx) THEN
Log.WarningSei[privateExport, sei]
ELSE
WITH it: iBase.seb[iValue] SELECT FROM
opaque =>
IF it.lengthKnown AND ~P4.DefaultBasicOps[sei, it.length] THEN
Log.ErrorSei[exportAttr, sei];
ENDCASE => ERROR;
IF public THEN {
link _ MakeTypeLink[EnterType[ctxb[ctx].module, epN, sei]];
bcdHeader.typeExported _ TRUE}};
$manifest =>
IF public
AND (type # typeTYPE OR iBase.seb[iSei].idType # typeTYPE) THEN
Log.WarningSei[voidExport, sei];
ENDCASE};
IF link # BcdDefs.NullLink THEN used _ TRUE;
IF mode # $manifest THEN {CompilerUtil.AppendBCDWord[link]; epN _ epN + 1};
ENDLOOP;
Copier.FreeSymbolTable[iBase];
IF ~used THEN Log.WarningSei[unusedExport, id]}};
ENDCASE;
RETURN[t]};

ExportItem: Tree.Scan = {
node: Tree.Index = TreeOps.GetNode[t];
saveIndex: SourceMap.Loc = dataPtr.textIndex;
dataPtr.textIndex _ tb[node].info;
tb[node].son[2] _ ExportId[tb[node].son[2]];
dataPtr.textIndex _ saveIndex};

ProcessExports: PUBLIC Tree.Map = {
offset: CARDINAL;
bcdHeader.nExports _ TreeOps.ListLength[t];
bcdHeader.expOffset _ offset _ CompilerUtil.ReadBCDOffset[];
evList^ _ [length:0, offsets:];
typeIndex _ BcdDefs.TYPIndex.FIRST;  mapIndex _ 0;  typeMap _ NIL;
TreeOps.ScanList[t, ExportItem];
bcdHeader.expLimit _ LOOPHOLE[CompilerUtil.ReadBCDOffset[]-offset];
bcdHeader.evOffset _ offset _ CompilerUtil.ReadBCDOffset[];
IF evList.length > maxEVLength THEN
Log.ErrorN[exportedVars, evList.length-maxEVLength];
IF evList.length = 0 THEN dataPtr.mtRoot.variables _ BcdDefs.EVNull
ELSE {
dataPtr.mtRoot.ngfi _ MAX[dataPtr.mtRoot.ngfi, evList.length/VarLimit+1];
dataPtr.mtRoot.variables _ BcdDefs.EVIndex.FIRST;
CompilerUtil.AppendBCDWords[evList,
BcdDefs.EVRecord.SIZE + MIN[evList.length, maxEVLength]]};
bcdHeader.evLimit _ LOOPHOLE[CompilerUtil.ReadBCDOffset[]-offset];
WriteTypeTable[];
typeMap _ NIL;
RETURN[t]};



ProcessFiles: PROC = {
ftEntry: BcdDefs.FTRecord;
mdi: MDIndex;
limit: MDIndex = (dataPtr.table).Top[mdType];

EnterCanonicalFile: PROC[canonical: BOOL, type: Type] = {
IF ~canonical THEN {
mdi: MDIndex;
[mdi, ] _  SymLiteralOps.UTypeId[type];
IF mdi # MDNull THEN [] _ PortedFile[mdi]}
};

offset: CARDINAL = CompilerUtil.ReadBCDOffset[];
FOR mdi _ lastPorted, mdi + MDRecord.SIZE UNTIL mdi = limit DO
IF mdb[mdi].file # nullFileIndex THEN
[] _ PortedFile[mdi];	-- add any files opened during compilation
ENDLOOP;
bcdHeader.ftOffset _ offset;
SymLiteralOps.EnumerateTypes[EnterCanonicalFile];
FOR mdi _ firstPorted, mdi + MDRecord.SIZE UNTIL mdi = lastPorted DO
ftEntry _ [name: EnterFileId[mdi], version: mdb[mdi].stamp];
CompilerUtil.AppendBCDWords[@ftEntry, BcdDefs.FTRecord.SIZE];
ENDLOOP;
bcdHeader.ftLimit _ LOOPHOLE[CompilerUtil.ReadBCDOffset[] - offset]};


InitBCD: PUBLIC PROC[ids: Tree.Link] = {
OPEN BcdDefs;
nIds: CARDINAL;
nIds _ TreeOps.ListLength[ids];
IF nIds > 1 AND ~dataPtr.interface THEN {Log.ErrorN[listLong, nIds-1]; nIds _ 1};
lastPorted _ firstPorted;
nStringREFTEXT _ NEW[TEXT[512]];
nString _ LOOPHOLE[nStringREFTEXT, BcdDefs.NameString];
nString.string.length _ BcdDefs.NullName;
nString.size[BcdDefs.NullName] _ 0;
mdb[OwnMdi].stamp _ dataPtr.objectVersion;	-- update from DIRECTORY processing
CompilerUtil.StartBCD[];
bcdHeader.versionIdent _ VersionID;
bcdHeader.version _ dataPtr.objectVersion;
bcdHeader.creator _ dataPtr.compilerVersion;
bcdHeader.sourceVersion _ dataPtr.source.version;
bcdHeader.nConfigs _ 0;
bcdHeader.nModules _ nIds;
bcdHeader.nImports _ bcdHeader.nExports _ 0;
bcdHeader.definitions _ dataPtr.interface;
bcdHeader.typeExported _ FALSE;
bcdHeader.repackaged _ bcdHeader.tableCompiled _ FALSE;
bcdHeader.versions _ FALSE;
bcdHeader.extended _ TRUE;
bcdHeader.spare1 _ TRUE;	-- large eval stack
bcdHeader.spare2 _ FALSE;
bcdHeader.ctOffset _ 0;  bcdHeader.ctLimit _ LOOPHOLE[0];
bcdHeader.spOffset _ 0;  bcdHeader.spLimit _ LOOPHOLE[0];
bcdHeader.fpOffset _ 0;  bcdHeader.fpLimit _ LOOPHOLE[0];
nString.string.length _ nString.string.length + 1;
bcdHeader.source _ NameRecord[nString.string.length];
nString.size[bcdHeader.source] _ dataPtr.source.locator.Length[];
ConvertUnsafe.AppendRope[to: @nString.string, from: dataPtr.source.locator];
bcdOffset _ CompilerUtil.ReadBCDOffset[];
CompilerUtil.AppendBCDWords[bcdHeader, BcdDefs.BCD.SIZE];
dataPtr.fixupLoc _ CompilerUtil.ReadBCDIndex[];
bcdHeader.sgOffset _ CompilerUtil.ReadBCDOffset[];
CompilerUtil.AppendBCDWords[@dataPtr.codeSeg, SGRecord.SIZE];
CompilerUtil.AppendBCDWords[@dataPtr.symSeg, SGRecord.SIZE];
bcdHeader.mtOffset _ mtOffset _ CompilerUtil.ReadBCDOffset[];
bcdHeader.sgLimit _ LOOPHOLE[mtOffset - bcdHeader.sgOffset];
IF dataPtr.interface THEN {
dataPtr.mtRootSize _ BcdDefs.MTRecord.indirect.SIZE;
dataPtr.mtRoot _ indirectMTRecord;
dataPtr.mtRoot.extension _ indirect[links: BcdDefs.LFNull]}
ELSE {
dataPtr.mtRootSize _ BcdDefs.MTRecord.multiple.SIZE;
dataPtr.mtRoot _ multipleMTRecord;
dataPtr.mtRoot.extension _ multiple[
links: BcdDefs.LFIndex.FIRST,
refLiterals: BcdDefs.RFNull,
types: BcdDefs.TFNull]};
FOR i: CARDINAL IN [0..nIds) DO
CompilerUtil.AppendBCDWords[dataPtr.mtRoot, dataPtr.mtRootSize]
ENDLOOP;
bcdHeader.lfOffset _ CompilerUtil.ReadBCDOffset[];
bcdHeader.mtLimit _ LOOPHOLE[bcdHeader.lfOffset-bcdHeader.mtOffset]};

FinishBCD: PUBLIC PROC[ids: Tree.Link] = {
OPEN BcdDefs;
pageSize: CARDINAL = BcdDefs.PageSize;
Alignment: CARDINAL = 4;  -- Code Segments must start at 0 MOD Alignment
nLinks: CARDINAL = dataPtr.linkCount;
codeLinks: BOOL = dataPtr.switches['l];
gfType: RecordSEIndex = bb[RootBti].type;
IF TreeOps.ListLength[ids] > 1 THEN {	-- complete nString now

EnterId: Tree.Scan = {[] _ EnterSymbolId[TreeOps.GetSe[t]]};

TreeOps.ScanList[ids, EnterId]};
dataPtr.mtRoot.name _ EnterSymbolId[bb[RootBti].id];
dataPtr.mtRoot.namedInstance _ FALSE;
dataPtr.mtRoot.initial _ ~dataPtr.switches['s];
dataPtr.mtRoot.file _ dataPtr.bcdSeg.file _ dataPtr.codeSeg.file _ dataPtr.symSeg.file _ 
PortedCtx[dataPtr.mainCtx];
dataPtr.bcdSeg.base _ 0;
dataPtr.mtRoot.linkLoc _ IF codeLinks THEN code ELSE frame;
dataPtr.mtRoot.config _ CTNull;
dataPtr.mtRoot.code _ CodeDesc[
sgi: SGIndex.FIRST,
packed: FALSE, linkspace: codeLinks,
offset: (IF codeLinks AND nLinks # 0
THEN (nLinks+1) + (Alignment-1 - (nLinks MOD Alignment))
ELSE 0),
length: 0];	-- will be updated
dataPtr.mtRoot.sseg _ SGIndex.FIRST + SGRecord.SIZE;
dataPtr.mtRoot.frameRefs _ seb[gfType].hints.refField;
dataPtr.mtRoot.frameType _
IF seb[gfType].hints.refField THEN SymLiteralOps.TypeIndex[gfType] ELSE 0;
dataPtr.mtRoot.framesize _ 0;	-- will be updated
dataPtr.mtRoot.altoCode _  FALSE;
dataPtr.mtRoot.tableCompiled _ FALSE;
dataPtr.mtRoot.residentFrame _ passPtr.resident;
dataPtr.mtRoot.boundsChecks _ dataPtr.switches['b];
dataPtr.mtRoot.nilChecks _ dataPtr.switches['n];
dataPtr.mtRoot.long _ dataPtr.switches['c];	-- compiled for Cedar
dataPtr.mtRoot.crossJumped _ dataPtr.switches['j];
dataPtr.mtRoot.packageable _ TRUE;
ProcessFiles[];
bcdHeader.ssOffset _ CompilerUtil.ReadBCDOffset[];
CompilerUtil.AppendBCDString[@nString.string];
bcdHeader.ssLimit _ LOOPHOLE[CompilerUtil.ReadBCDOffset[]-bcdHeader.ssOffset];
IF dataPtr.interface THEN bcdHeader.rtPages.relPageBase _ 0
ELSE {
CompilerUtil.FillBCDPage[];
bcdHeader.rtPages.relPageBase _ CompilerUtil.ReadBCDOffset[]/pageSize;
CompilerUtil.RTTableOut[dataPtr.table]};
bcdHeader.nPages _ (CompilerUtil.ReadBCDOffset[] + (pageSize-1))/pageSize;
bcdHeader.rtPages.pages _ bcdHeader.nPages - bcdHeader.rtPages.relPageBase;
CompilerUtil.UpdateBCDWords[bcdOffset, bcdHeader, BcdDefs.BCD.SIZE];
dataPtr.bcdSeg.base _ 0; dataPtr.bcdSeg.pages _ bcdHeader.nPages;
IF dataPtr.interface AND TreeOps.ListLength[ids] > 1 THEN {
offset: CARDINAL _ mtOffset;
saveName: BcdDefs.NameRecord = dataPtr.mtRoot.name;

UpdateMDEntry: Tree.Scan = {
dataPtr.mtRoot.name _ EnterSymbolId[TreeOps.GetSe[t]];
CompilerUtil.UpdateBCDWords[offset, dataPtr.mtRoot, dataPtr.mtRootSize];
offset _ offset + dataPtr.mtRootSize};

offset _ mtOffset;  TreeOps.ScanList[ids, UpdateMDEntry];
dataPtr.mtRoot.name _ saveName};
CompilerUtil.EndBCD[];
nStringREFTEXT _ NIL;
nString _ NIL};


MatchBCD: PUBLIC PROC RETURNS[matched: BOOL _ FALSE] = {
oldSymbols: SymbolTable.Base _ Copier.MapSymbols[dataPtr.pattern];
IF oldSymbols = NIL THEN Log.WarningRope[fileName, dataPtr.pattern.locator]
ELSE {
matched _ ReplOps.MatchedBodies[
[oldSymbols, RootBti], [dataPtr.ownSymbols, RootBti]
! ReplOps.Unmatched => {
d: ConvertUnsafe.SubString;
d _ id.stb.SubStringForName[id.stb.NameForSe[id.sei]];
SELECT attr FROM
strings => Log.WarningSubString[replString, d];
id => Log.WarningSubString[replId, d];
ENDCASE;
RESUME}];
Copier.UnmapSymbols[oldSymbols]}};


{
WordSeq: TYPE = RECORD[SEQUENCE COMPUTED CARDINAL OF WORD];
systemUZone: UNCOUNTED ZONE = UnsafeStorage.GetSystemUZone[];
evList _ LOOPHOLE[
	systemUZone.NEW[WordSeq[BcdDefs.EVRecord.SIZE+maxEVLength]],
	BcdDefs.EVHandle];
bcdHeader _ systemUZone.NEW[BcdDefs.BCD];

indirectMTRecord _ systemUZone.NEW[BcdDefs.MTRecord.indirect];
multipleMTRecord _ systemUZone.NEW[BcdDefs.MTRecord.multiple];
};

}.

„Pass4B.Mesa
Copyright c 1985 by Xerox Corporation.  All rights reserved.
Satterthwaite, April 11, 1986 12:15:16 pm PST
Sweet, Jan 20, 1981 12:32 PM
Paul Rovner, October 5, 1983 5:03 pm
Russ Atkinson (RRA) March 6, 1985 10:49:46 pm PST
called by allocator whenever table area is repacked
shared variables
service routines
processing directory entries (to file table)
relocating imported control links
writing frame fragments (link fragment written by Pass4L)
writing import records
N.B. nextGfi must be regenerated to match AssignImports
writing export records
initialization/finalization
allocate the null name
fill MTRecord

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