[Cyan]<Cedar6.0>BCDStuff>SymbolSegment.mesa!2

SymbolSegment.Mesa

Satterthwaite, February 17, 1983 3:01 pm

Russ Atkinson (RRA) January 31, 1985 1:06:12 pm PST

DIRECTORY

Literals USING [ltType, stType],

Symbols USING [ISEIndex, CTXIndex, ExtensionType, seType, htType, ssType, ctxType, mdType, bodyType],

Table USING [Base, Selector, Limit],

TimeStamp USING [Stamp],

Tree USING [Link, treeType];

SymbolSegment: DEFINITIONS = {

VersionID: CARDINAL = 08140;

Base: TYPE = Table.Base;

Limit: CARDINAL = Table.Limit;

symbol table extensions

ExtRecord: TYPE = RECORD [

type: Symbols.ExtensionType[$value..$default],

sei: Symbols.ISEIndex, -- the key

tree: Tree.Link];

ExtIndex: TYPE = Base RELATIVE POINTER [0..Limit) TO ExtRecord;

ExtNull: ExtIndex = ExtIndex.LAST;

allocation codes

treeType: Table.Selector = Tree.treeType;

seType: Table.Selector = Symbols.seType;

htType: Table.Selector = Symbols.htType;

ssType: Table.Selector = Symbols.ssType;

ctxType: Table.Selector = Symbols.ctxType;

mdType: Table.Selector = Symbols.mdType;

bodyType: Table.Selector = Symbols.bodyType;

ltType: Table.Selector = Literals.ltType;

stType: Table.Selector = Literals.stType;

extType: Table.Selector = 9;

atType: Table.Selector = 10; -- atom and typeId table

constType: Table.Selector = 11;

Tables: TYPE = Table.Selector[treeType..constType];

symbol segment headers

WordOffset: TYPE = CARDINAL;

BlockDescriptor: TYPE = RECORD [offset: WordOffset, size: CARDINAL];

STHeader: TYPE = RECORD [

versionIdent: CARDINAL,

version: TimeStamp.Stamp,

creator: TimeStamp.Stamp,

sourceVersion: TimeStamp.Stamp,

definitionsFile: BOOL,

extended: BOOL,

directoryCtx, importCtx, outerCtx: Symbols.CTXIndex,

hvBlock: BlockDescriptor,

htBlock: BlockDescriptor,

ssBlock: BlockDescriptor,

outerPackBlock: BlockDescriptor,

innerPackBlock: BlockDescriptor,

constBlock: BlockDescriptor,

seBlock: BlockDescriptor,

ctxBlock: BlockDescriptor,

mdBlock: BlockDescriptor,

bodyBlock: BlockDescriptor,

extBlock: BlockDescriptor,

treeBlock: BlockDescriptor,

litBlock: BlockDescriptor,

sLitBlock: BlockDescriptor,

epMapBlock: BlockDescriptor,

spareBlock: BlockDescriptor,

fgRelPgBase: CARDINAL,

fgPgCount: [0..256]];

fine grain table header

FGHeader: TYPE = RECORD [

offset: WordOffset,

length: CARDINAL,

sourceFile: StringBody -- text follows --];

fine grain table declarations

SourceStep: CARDINAL = 0FFh;

ObjectStep: CARDINAL = 07Fh;

Stride: CARDINAL = 03FFFh;

FGTEntry: TYPE = RECORD [SELECT tag: * FROM

normal => [deltaObject: [0..ObjectStep], deltaSource: [0..SourceStep]],

step => [which: {source, object}, delta: [0..Stride]]

ENDCASE];