DIRECTORY
CD USING [CellPtr, Design, Error, ErrorCode, Instance, InterestRect, InterestSize, Layer, Object, Position, Rect, Technology],
CDCells USING [CreateEmptyCell, IncludeMode, IncludeOb, RepositionCell, SetInterestRect],
CDDirectory USING [Include],
CDImports USING [Load, CreateImport],
CDIO USING [MakeName, ReadDesign, WriteDesign],
CDOps USING [CreateDesign],
CDProperties USING [PutPropOnObject, RegisterProperty],
CDRects USING [CreateRect],
CDSil USING [cdsil, xaqua, xbrown, xcyan, xgreen, xlime, xmagenta, xneutral, xorange, xpink, xred, xsmoke, xturquise, xultraviolet, xviolet, xwhite, xyellow],
CDSilConversion,
CDTexts USING [CreateText, FontRec, MakeFont],
CDViewer USING [CreateViewer],
Commander USING [CommandProc, Register],
CommandTool USING [ParseToList],
FileNames USING [CurrentWorkingDirectory], 
FS USING [ComponentPositions, Error, ExpandName, Position, StreamOpen],
ImagerFont USING [Extents, Font, RopeBoundingBox],
IO USING [Close, EndOf, EndOfStream, GetChar, STREAM, UnsafeGetBlock],
Real USING [Round],
Rope USING [ActionType, Cat, Concat, FromChar, FromProc, Length, Map, Replace, ROPE, SkipTo, Substr],
TerminalIO USING [WriteChar, WriteInt, WriteLn, WriteRope, UserAbort, Confirm],
UserProfile USING [Token];

CDSilConversionImpl: CEDAR PROGRAM
IMPORTS CD, CDCells, CDDirectory, CDImports, CDIO, CDOps, CDProperties, CDRects, CDSil, CDTexts, CDViewer, Commander, CommandTool, FileNames, FS, ImagerFont, IO, Real, Rope, TerminalIO, UserProfile
EXPORTS CDSilConversion =
BEGIN OPEN CDSilConversion;
convLibEachTime: BOOL = FALSE;	-- convert all library files for each model
verbose: BOOL = FALSE;	-- Asks the user whether he wants to write the converted model and libraries
debug0: BOOL _ FALSE;	-- reading file
debug1: BOOL _ FALSE;	-- converting
debug2: BOOL _ FALSE;	-- integration of macro files
debug3: BOOL _ FALSE;	-- main Sil model
debug4: BOOL _ FALSE;	-- translation of font names
debugAll: BOOL _ debug0 OR debug1 OR debug2 OR debug3 OR debug4;

FourBits:	TYPE ~ [0..17B];
TwelveBits:	TYPE ~ [0..7777B];
SixteenBits:	TYPE ~ [0..177777B];
OneBit: 	TYPE ~ [0..1];
ElevenBits:	TYPE ~ [0..3777B];
bytesInSilItemBlock: NAT ~ 10;
mainElementName: CHAR ~ 377C;	-- this as name of silobject means it's part of main picture
checkCodeByte1: CHAR ~ '9;	-- check code indicating Sil format
unbuiltCheckCodeByte2: CHAR ~ 'r;
builtCheckCodeByte2: CHAR ~ 's;
largeFormatFileByte2: CHAR ~ 'l;	-- new password for large format files
SilBlockRef: TYPE ~ REF SilBlock;
SilBlock: TYPE ~  MACHINE DEPENDENT RECORD [
leftChar, rightChar: CHAR,
state	: FourBits,
xMin	: TwelveBits,
yMin	: SixteenBits,
color	: FourBits,
xMax	: TwelveBits,
font	: FourBits,
italic	: OneBit,
yMax	: ElevenBits			
];
TrueFonts: TYPE ~ [0..3];
MainFile: TYPE ~ [4..4];
SilFile: TYPE ~ [4..9];
InternalFonts: TYPE ~ [0..15];
InternalFileMacroFonts: TYPE ~ [8..8];
InternalTrueFonts: TYPE ~ [0..7];
InternalLibraryFile: TYPE ~ [9..13];
InternalRopeFonts: TYPE ~ [0..13];		-- those fonts which do not denote boxes.  See below
InternalForegroundBoxFonts: TYPE ~ [14..14];
InternalBackgroundBoxFonts: TYPE ~ [15..15];
mainFile: MainFile ~ 4;
Color: TYPE ~ [0..15];
colorTable: ARRAY Color OF CD.Layer ~ [CDSil.xneutral, CDSil.xred, CDSil.xyellow, CDSil.xgreen, CDSil.xcyan, CDSil.xviolet, CDSil.xmagenta, CDSil.xwhite, CDSil.xbrown, CDSil.xorange, CDSil.xlime, CDSil.xturquise, CDSil.xaqua, CDSil.xultraviolet, CDSil.xpink, CDSil.xsmoke];
neutralColor: Color ~ 0;
Font: TYPE ~ RECORD [
name: Rope.ROPE,
descr: REF READONLY CDTexts.FontRec _ NIL
];
cellFonts: ARRAY InternalTrueFonts OF ARRAY BOOL OF Font;
ObjectName: TYPE ~ CHAR['  .. '~];	-- Only printing characters are used
MacroName: TYPE ~ CHAR['! .. '~];	-- All but <space>
mainObject: ObjectName ~ ' ;	-- object whose name is <space>
SilObject: TYPE ~  RECORD [
xMin, yMin: INTEGER,	-- Upper Left boundary of box or string
xMax, yMax: INTEGER,	-- Lower right boundary of box, guess for lower right of string
color: Color,	-- Color used to display or print silobject
font: InternalFonts,
italic: BOOL,	-- Only interesting for Ropes (fonts 0-13), TRUE  for italic strings
value: Rope.ROPE _ NIL
];
SilObjectList: TYPE ~ LIST OF SilObject;
Macro: TYPE ~ RECORD [
xMin, yMin: INTEGER _ 32767,	-- Upper Left boundary of macro definition
xMax, yMax: INTEGER _ -1,	-- Lower right boundary of macro definition
-- note: coordinates are Alto screen absolute, hence -1 is OK.
objects: SilObjectList _ NIL,
cdCellPtr: CD.Object _ NIL	-- This field used to generate recursion if a cell includes a cell not known yet.
];
LibraryDesign: TYPE ~ RECORD [
data: CD.Design _ NIL,
imported: BOOL _ FALSE,	-- Chipndale wants only a single import of the same library
written: BOOL _ FALSE	-- libraries are written only once per run
];
MacroPtr: TYPE ~ REF Macro _ NIL;
MacroFile: TYPE ~ ARRAY ObjectName OF MacroPtr;
allMacros: REF MacroFile _ NIL;
silDesigns: ARRAY SilFile OF LibraryDesign;	-- need all because of imports
background: ATOM = $SilBackground;
silProfilePrefix: Rope.ROPE ~ "Sil.Font";
cdSilProfilePrefix: Rope.ROPE ~ "Chipndale.chipnsil.Library";
lambda: INTEGER = CDSil.cdsil.lambda;	-- Sil uses integers throughout
lambdaAltoScreenHeights: INTEGER ~ lambda * 808;

CrackNames: PROC [genericName: Rope.ROPE] RETURNS [fullSilName: Rope.ROPE, properName: Rope.ROPE] ~ {
namePos: FS.ComponentPositions;
silExtension: Rope.ROPE ~ "sil";
dummy: Rope.ROPE;	-- in Cedar 5.2 FS.ExpandName does not work as documented
fullSilName _ CDIO.MakeName [base: genericName, ext: silExtension, wDir: FileNames.CurrentWorkingDirectory[]];
[fullFName: dummy, cp: namePos] _ FS.ExpandName [name: fullSilName];
properName _ Rope.Substr [base: dummy, start: namePos.base.start, len: namePos.base.length]
};	-- end CrackNames

TechnologyIsCdsil: PROC [d: CD.Design] RETURNS [b: BOOL] ~ {
IF d = NIL THEN CD.Error [explanation: "Programming error in ReadSilLibrary"];
RETURN [d.technology =  CDSil.cdsil]
};	-- end TechnologyIsCdsil

ReadSilModel: PUBLIC PROC [name: Rope.ROPE] RETURNS [design: CD.Design _ NIL] ~ {
designName: Rope.ROPE;
write: BOOL _ NOT verbose;
[fullSilName: name, properName: designName] _ CrackNames [name];
IF convLibEachTime THEN
FOR lib: LibraryFile IN LibraryFile DO
silDesigns[lib].data _ NIL; silDesigns[lib].imported _ FALSE
ENDLOOP;
design _ CDOps.CreateDesign [technology: CDSil.cdsil];
design.name _ designName;
silDesigns[mainFile].data _ design;
ReadSilFile [fileName: name]; ConvertSilFile [file: mainFile];
IF verbose THEN write _ TerminalIO.Confirm [label: "CDSilConversion", choice: Rope.Cat["Write ", designName, " to disk ?"]];
IF write THEN
IF NOT CDIO.WriteDesign [design: design, to: designName] THEN
TerminalIO.WriteRope [Rope.Cat["Warning: The design ", designName, " cannot be written. Proceeding anyway.\n"]];
[] _ CDViewer.CreateViewer [design: design];
};	-- end ReadSilModel

ReadSilLibrary: PUBLIC PROC [library: LibraryFile] RETURNS [cells: CD.Design _ NIL] ~ {
libraryPrefix: Rope.ROPE ~ "sil.lb";	-- Cedar Sil
designPrefix: Rope.ROPE ~ "SilLib";	-- Chipnsil
macroFileName, cdFileName, defaultName, designName: Rope.ROPE;
key: Rope.ROPE;	-- Access key for the User Profile.
write: BOOL _ NOT verbose;
IF silDesigns[library].data # NIL THEN RETURN [silDesigns[library].data];
key _ Rope.Concat [cdSilProfilePrefix, Rope.FromChar['0 + library]];
defaultName _ Rope.Cat [designPrefix, Rope.FromChar['0 + library], ".dale"];
cdFileName _ UserProfile.Token [key: key, default: defaultName];
designName _ CrackNames [cdFileName].properName;
key _ Rope.Concat [silProfilePrefix, Rope.FromChar['0 + library]];
defaultName _ Rope.Concat [libraryPrefix, Rope.FromChar['0 + library]];
macroFileName _ UserProfile.Token [key: key, default: defaultName];
IF NOT convLibEachTime THEN BEGIN
cells _ CDIO.ReadDesign [from: cdFileName, check: TechnologyIsCdsil];
IF cells # NIL THEN {silDesigns[library].data _ cells; RETURN [cells]}
ELSE
TerminalIO.WriteRope [Rope.Cat["The library file ", cdFileName, " is not available. It is being converted from ", macroFileName, "\n"]];
END;	-- NOT convLibEachTime
ReadSilFile [fileName: macroFileName];
cells _ CDOps.CreateDesign[technology: CDSil.cdsil];
cells.name _ designName;
silDesigns[library].data _ cells;
ConvertSilFile [file: library];
IF verbose THEN write _ TerminalIO.Confirm[label: "CDSilConversion", choice: Rope.Cat["Write ", designName, " to disk ?"]];
IF write THEN {
IF NOT silDesigns[library].written THEN {
silDesigns[library].written _ CDIO.WriteDesign [design: cells, to: cdFileName];
IF NOT silDesigns[library].written THEN
TerminalIO.WriteRope [Rope.Cat["Warning: The design ", designName, " cannot be written. Proceeding anyway.\n"]]
}
};	-- IF write
RETURN [cells]
};	-- end ReadSilLibrary

SetFonts: PROC [] ~ {
key: Rope.ROPE;	-- Access key for the User Profile.
TrueFontsDefaults: TYPE ~ ARRAY TrueFonts OF Rope.ROPE;
trueFontsDefaults: TrueFontsDefaults ~ ["Helvetica10", "Helvetica7", "Template64", "Gates32"];
italic: BOOL ~ TRUE;
FixAttibutes: PROC [coarseName: Rope.ROPE] RETURNS [notBold, italic, both: Rope.ROPE] ~ {
properName, dummy, attributes, notBAttr: Rope.ROPE;
namePos: FS.ComponentPositions;
attributePos, bPos: INTEGER;
alreadyItalic: BOOL;
[fullFName: dummy, cp: namePos] _ FS.ExpandName [name: coarseName];
properName _ Rope.Substr [base: dummy, start: namePos.base.start, len: namePos.base.length];
attributePos _ properName.SkipTo [0, "0123456789"];
attributes _ properName.Substr [attributePos, properName.Length[]-attributePos];
bPos _ attributes.SkipTo [0, "bB"];
IF bPos = attributes.Length[] THEN notBAttr _ Rope.Concat [attributes, "B"]
ELSE notBAttr _ Rope.Replace [base: attributes, start: bPos, len: 1];
alreadyItalic _ (attributes.SkipTo [0, "iI"] # attributes.Length []);
IF NOT alreadyItalic THEN attributes _ Rope.Concat [attributes, "I"];
notBold _ Rope.Replace [base: properName, start: attributePos, len: properName.Length[]-attributePos, with: notBAttr];
italic _ Rope.Replace [base: properName, start: attributePos, len: properName.Length[]-attributePos, with: attributes];
IF alreadyItalic THEN both _ notBold
ELSE {
notBAttr _ Rope.Concat [notBAttr, "I"];
both _ Rope.Replace [base: properName, start: attributePos, len: properName.Length[]-attributePos, with: notBAttr]
};
IF debug4 THEN {
TerminalIO.WriteRope [Rope.Cat["Original font: ", coarseName, ", notBold: "]];
TerminalIO.WriteRope [Rope.Cat[notBold, ", italic: ", italic]];
TerminalIO.WriteRope [Rope.Cat[", both: ", both, "\n"]];
}
};	-- end FixAttibutes

FOR i: TrueFonts IN TrueFonts DO 
key _ Rope.Concat [silProfilePrefix, Rope.FromChar ['0 + i]];
cellFonts[2*i][~italic].name _ UserProfile.Token [key: key, default: trueFontsDefaults[i]];
[cellFonts[2*i+1][~italic].name, cellFonts[2*i][italic].name, cellFonts[2*i+1][italic].name] _ FixAttibutes [cellFonts[2*i][~italic].name];
ENDLOOP
};	-- end SetFonts

MakeCDFont: PROC [nr: InternalTrueFonts, italic: BOOL] ~ {
fullName: Rope.ROPE;
fullName _ Rope.Cat ["Xerox/TiogaFonts/", cellFonts[nr][italic].name];
cellFonts[nr][italic].descr _ CDTexts.MakeFont[name: fullName, scale: lambda];
IF cellFonts[nr][italic].descr = NIL THEN {
TerminalIO.WriteRope [Rope.Cat["CDTexts.MakeFont returns not found on ", fullName, ". Fatal error.\n"]];
ERROR ABORTED
}
};	-- end MakeCDFont

ConvertSilFile: PROC [file: SilFile] ~ {

MacroToObject: PROC [sil: MacroPtr, name: ObjectName] RETURNS [object: CD.Object _ NIL] ~ {
size, position: CD.Position _ [0, 0];
topLeftPos: CD.Position _ [0, 0];
cdObPtr: CD.Object _ NIL;	-- object before it is either a cell or an application
cell: CD.Object _ NIL;	-- NIL when object is not a cell
boundingBox: CD.Rect;	-- interesting rectangle
height: INTEGER _ 0;  -- height of cell or main object
import, workingOnMainObject: BOOL;
impName: Rope.ROPE;	-- global importee name assigned in FOR loop and used in ExpandRope
ExpandRope: PROC [c: CHAR] RETURNS [quit: BOOL _ FALSE] ~ {
cdObPtr: CD.Object;	-- object before it is either a cell or an application
sz, pos: CD.Position;
IF import THEN BEGIN
cdObPtr _ CDImports.CreateImport[into: silDesigns[file].data, objectName: Rope.FromChar[c], importeeName: impName];
IF cdObPtr = NIL THEN 
CD.Error [ec: other, explanation: "CDImports.CreateImport failed"];
END
ELSE	-- not import: file macro
IF allMacros[c].cdCellPtr = NIL THEN {
IF debug1 THEN {
TerminalIO.WriteRope ["   will prepone macro "];
TerminalIO.WriteChar [c]; TerminalIO.WriteLn[]
};
cdObPtr _ MacroToObject [allMacros[c], c];
}
ELSE cdObPtr _ allMacros[c].cdCellPtr;
sz _ CD.InterestSize[cdObPtr];
pos _ [topLeftPos.x, topLeftPos.y-sz.y];
topLeftPos.x _ topLeftPos.x + sz.x;
[] _ CDCells.IncludeOb [design: silDesigns[file].data, cell: cell, ob: cdObPtr, position: pos, obCSystem: interrestCoords, mode: dontPropagate];
};	-- end ExpandRope
workingOnMainObject _ (name = ' );
height _ IF workingOnMainObject THEN lambdaAltoScreenHeights
ELSE lambda * (sil.yMax - sil.yMin);
boundingBox _ [x1: lambda*sil.xMin, y1: height - lambda*sil.yMax, x2: lambda*sil.xMax, y2: height - lambda*sil.yMin];
IF workingOnMainObject THEN cell _ NIL
ELSE {
ir: CD.Rect _ [x1: lambda*sil.xMin, y1: height - lambda*sil.yMax, x2: lambda*sil.xMax, y2: height - lambda*sil.yMin];
cell _ CDCells.CreateEmptyCell[];
CDCells.SetInterestRect[cell, ir];
IF debug2 AND ((name = 'B) OR (name = 'x)) THEN {
TerminalIO.WriteRope ["SetInterestRect to "];
TerminalIO.WriteInt [boundingBox.x1]; TerminalIO.WriteInt [boundingBox.y1];
TerminalIO.WriteInt [boundingBox.x2]; TerminalIO.WriteInt [boundingBox.y2];
TerminalIO.WriteLn
}
};
FOR silObj: SilObjectList _ sil.objects, silObj.rest WHILE silObj # NIL DO
size.x _ lambda * (silObj.first.xMax - silObj.first.xMin);  
size.y _ lambda * (silObj.first.yMax - silObj.first.yMin);
topLeftPos.x _ position.x _ lambda * silObj.first.xMin;
position.y _ height - lambda * silObj.first.yMax;
topLeftPos.y _ height - lambda * silObj.first.yMin;
SELECT silObj.first.font FROM
IN InternalTrueFonts => {
cdFont: REF READONLY CDTexts.FontRec;
er: ImagerFont.Extents;
IF (cellFonts[silObj.first.font][silObj.first.italic].descr = NIL) THEN
MakeCDFont [silObj.first.font, silObj.first.italic];
cdFont _ cellFonts[silObj.first.font][silObj.first.italic].descr;
cdObPtr _ CDTexts.CreateText [text: silObj.first.value, font: cdFont, layer: colorTable[silObj.first.color]];
IF cdObPtr = NIL THEN CD.Error [ec: other, explanation: "Cannot create text"];
IF debug2 AND ((name = 'B) OR (name = 'x)) THEN {
TerminalIO.WriteRope [Rope.Concat ["Value, scendent and y position: ", silObj.first.value]];
TerminalIO.WriteInt [position.y];
TerminalIO.WriteLn []
};
er _ ImagerFont.RopeBoundingBox [cdFont.font, silObj.first.value];
position.y _ height - lambda * silObj.first.yMin - Real.Round[er.ascent] - cdFont.origin.y;
[] _ CDCells.IncludeOb [design: silDesigns[file].data, cell: cell, ob: cdObPtr, position: position, obCSystem: cdCoords, mode: dontPropagate]
};
IN InternalFileMacroFonts => {
IF debug1 THEN {
TerminalIO.WriteChar [name];
TerminalIO.WriteRope [" calls a cell in the same design:\n"]
};
import _ FALSE;
[] _ Rope.Map [base: silObj.first.value, action: ExpandRope]
};
IN InternalLibraryFile => {
externalFileNr: LibraryFile;	-- Since the exported procedure works with the external library file numbering, we cannot use the internal Sil numbering when we call our procedures.
IF debug1 THEN
TerminalIO.WriteRope ["Import of a cell in another design.\n"];
externalFileNr _ silObj.first.font - mainFile;
IF (silDesigns[externalFileNr].data = NIL) THEN [] _ ReadSilLibrary [externalFileNr];
IF NOT silDesigns[externalFileNr].imported THEN {
silDesigns[externalFileNr].imported _ CDImports.Load[into: silDesigns[file].data, importeeName: silDesigns[externalFileNr].data.name];
IF NOT silDesigns[externalFileNr].imported THEN
IF file IN MainFile THEN
CD.Error [ec: other, explanation: "Cannot import library"]
ELSE CD.Error [ec: other, explanation: "Library tried to import other library"]
};
impName _ silDesigns[externalFileNr].data.name;	-- assigned to a global variable, so that it can be used inside ExpandRope
import _ TRUE;
[] _ Rope.Map [base: silObj.first.value, action: ExpandRope]
};
IN InternalForegroundBoxFonts => {
cdObPtr _ CDRects.CreateRect [size: size, l: colorTable[silObj.first.color]];
[] _ CDCells.IncludeOb [design: silDesigns[file].data, cell: cell, ob: cdObPtr, position: position, obCSystem: interrestCoords, mode: dontPropagate]
};
IN InternalBackgroundBoxFonts => {
cdObPtr _ CDRects.CreateRect [size: size, l: colorTable[silObj.first.color]];
CDProperties.PutPropOnObject [onto: cdObPtr, prop: background, val: background];
[] _ CDCells.IncludeOb [design: silDesigns[file].data, cell: cell, ob: cdObPtr, position: position, obCSystem: interrestCoords, mode: dontPropagate]
};
ENDCASE => CD.Error [explanation: "Invalid case in CDSilConversionImpl.MacroToObject"]
ENDLOOP;
IF NOT workingOnMainObject THEN {
ir: CD.Rect;
NARROW [cell.specificRef, CD.CellPtr].simplifyOn _ height / (2 * lambda);
[] _ CDCells.RepositionCell [cellOb: cell, design: NIL];
ir _ CD.InterestRect [cell];
ir.x2 _ ir.x1+cell.size.x;
CDCells.SetInterestRect [cell, ir];
[] _ CDDirectory.Include [design: silDesigns[file].data, object: cell, alternateName: Rope.FromChar[name]];
};
object _ IF workingOnMainObject THEN cdObPtr ELSE cell;
sil.cdCellPtr _ object;
sil.objects _ NIL;	-- dispose obsolete space
IF debug1 THEN {
TerminalIO.WriteRope ["Converted object "];
TerminalIO.WriteChar [name]; TerminalIO.WriteLn[]
};
RETURN [object]
};	-- end MacroToObject

FOR obj: MacroName IN MacroName DO
IF ((allMacros[obj] # NIL) AND (allMacros[obj].cdCellPtr = NIL)) THEN
[] _ MacroToObject [allMacros[obj], obj]
ENDLOOP;
IF ((allMacros[mainObject] # NIL) AND (allMacros[mainObject].cdCellPtr = NIL)) THEN
[] _ MacroToObject [allMacros[mainObject], mainObject];
IF debugAll THEN TerminalIO.WriteRope ["Sil macro file converted to Chipndale model\n"]
};	-- end ConvertSilFile

ReadSilFile: PROC [fileName: Rope.ROPE]
~ {
sBlock: SilBlockRef _ NEW [SilBlock];

AddItemBlockToMacro: PROC [itemBlock: SilObject, name: CHAR]
~ {
m: MacroPtr _ allMacros[name];
IF m = NIL THEN m _ NEW [Macro];
m.xMin _ MIN [m.xMin, itemBlock.xMin];
m.yMin _ MIN [m.yMin, itemBlock.yMin];
m.xMax _ MAX [m.xMax, itemBlock.yMax];
m.yMax _ MAX [m.yMax, itemBlock.yMax];
m.objects _ CONS [itemBlock, m.objects];
allMacros[name] _ m
};	-- end AddItemBlockToMacro

ReadItemBlock: PROC [s: IO.STREAM]
RETURNS [name: CHAR, itemBlock: SilObject]
~ {
ENABLE IO.EndOfStream => CD.Error [ec: other, explanation: "Unexpected End Of Stream"];
ReadChar: PROC[] RETURNS [c: CHAR]
~ {
RETURN [s.GetChar[] ];
};	-- end ReadChar
maxRecLen: INTEGER ~ 256;	--the longest a record can be (1 byte for its length)
len: INTEGER;
TRUSTED	{
bytesGot: INT _ s.UnsafeGetBlock[
[base: LOOPHOLE[sBlock], startIndex: 0, count: bytesInSilItemBlock]
];
IF bytesGot # bytesInSilItemBlock THEN
CD.Error [ec: other, explanation: "Macro file corrupted"]
};

name _ IF sBlock.leftChar = mainElementName THEN '  ELSE sBlock.rightChar;
itemBlock.xMin	_ sBlock.xMin;
itemBlock.yMin	_ sBlock.yMin;
itemBlock.xMax	_ sBlock.xMax;
itemBlock.yMax	_ sBlock.yMax;
itemBlock.color	_ sBlock.color;
itemBlock.font	_ sBlock.font;
itemBlock.italic	_ (sBlock.italic = 1);

IF debug0 THEN {
TerminalIO.WriteLn;	TerminalIO.WriteChar [name];
TerminalIO.WriteInt [ORD[name]];
{OPEN itemBlock;
TerminalIO.WriteRope [":  xMin, yMin:"];
TerminalIO.WriteInt [xMin];	TerminalIO.WriteInt [yMin];
TerminalIO.WriteRope [". xMax, yMax:"];
TerminalIO.WriteInt [xMax];	TerminalIO.WriteInt [yMax];
TerminalIO.WriteRope [". Col:"];	TerminalIO.WriteInt [color];
TerminalIO.WriteRope [". Font:"];	TerminalIO.WriteInt [font];
IF color # 0 THEN TerminalIO.WriteRope ["***"];
IF NOT italic THEN TerminalIO.WriteRope [", not"];
TerminalIO.WriteRope [" italic "];
}
};

IF itemBlock.font IN InternalRopeFonts THEN {
len _ s.GetChar[] - 0C;
itemBlock.value _ Rope.FromProc [len, ReadChar, maxRecLen];
IF debug0 THEN TerminalIO.WriteRope [itemBlock.value];
IF len MOD 2 = 0 THEN	--Make sure to start next item block on a word boundary
[] _ s.GetChar[];	--Flush the extra slot for a Char
}
};	-- end ReadItemBlock
{
header1, header2: CHAR;
s: IO.STREAM _ FS.StreamOpen [fileName ! FS.Error => 
IF error.group#bug THEN {
TerminalIO.WriteRope [Rope.Cat [fileName, " not opened: ", error.explanation]];
ERROR ABORTED
}
];
name: CHAR;  itemBlock: SilObject;
IF debugAll THEN {
TerminalIO.WriteRope [fileName]; TerminalIO.WriteLn
};
header1 _ s.GetChar[]; header2 _ s.GetChar[];
IF (header1 = checkCodeByte1) AND (header2 = unbuiltCheckCodeByte2) THEN {
IF  debugAll THEN TerminalIO.WriteRope ["Sil file format OK.\n"]
}
ELSE IF (header1 = checkCodeByte1) AND (header2 = builtCheckCodeByte2) THEN
TerminalIO.WriteRope ["Sil schematic file has been 'build' into a wire-list file via the Build process.\n"]
ELSE IF header2 = largeFormatFileByte2 THEN {
TerminalIO.WriteRope ["Large format files not yet implemented. ABORTED\n"];
ERROR ABORTED
}
ELSE TerminalIO.WriteRope ["File not in Sil format. Proceeding anyway.\n"];
allMacros _ NEW [MacroFile];
WHILE NOT s.EndOf[] DO 
[name, itemBlock] _ ReadItemBlock [s];
AddItemBlockToMacro [itemBlock, name]
ENDLOOP;
IO.Close[s]
}
};	-- end ReadSilFile

ReadModel: Commander.CommandProc = 
BEGIN
ENABLE { 
TerminalIO.UserAbort => GOTO UserAbrt;
};
list: LIST OF Rope.ROPE;
length: NAT;
name: Rope.ROPE;
[list, length] _ CommandTool.ParseToList [cmd];
IF length = 1 THEN name _ list.first
ELSE  {
result _ $Failure;
msg _ "unknown arguments";
TerminalIO.WriteRope ["Read command failed\n"];
RETURN
};
IF convLibEachTime THEN TerminalIO.WriteRope ["All libraries will be converted as they are referenced.\n"]
ELSE TerminalIO.WriteRope ["If they exist, the libraries specified in the user profile entries 'ChipNDale.ChipNSil.Library%' will be used. Delete them to force the creation of new ones.\n"];
[] _ ReadSilModel [name];
EXITS
UserAbrt => {TerminalIO.WriteRope ["Read aborted\n"]};
END;

SetFonts[];
IF NOT CDProperties.RegisterProperty [prop: background, registrationKey: $GBB] THEN TerminalIO.WriteRope ["CDSilConversionImpl re-executed"];	-- somebody is already using it
Commander.Register [key: "CDReadSil", proc: ReadModel, doc: "Read a SIL model into ChipNSil and save it"]
END. 
!δCDSilConversionImpl.mesa
Copyright c 1984, 1985 by Xerox Corporation.  All rights reserved.
Last Edited by: Jacobi, September 25, 1985 2:51:48 pm PDT
gbb October 14, 1985 4:56:32 pm PDT
This module allows Chipndale to access Sil files and macros.

Toggles for behaviour of this program
Toggles for debugging
Description of the SIL file structure:
The first word in the file is a check code, that can be used to see that the file is actually a Sil format file.  This word has two possible values, octal 34562 and 34563.  The second value has been adopted as part of the design automation process to indicate that a Sil schematic file has been "build" into a wire-list file via the Build process.
Following this word are a secession of "item blocks" that describe the contents of the Sil drawing.  An Item block has the following form:
word 0:	macro-code
If this word equals a character code, then this item is to be added to the list of items for the macro Font 4 character.  All items which are part of macro definitions will appear first in the file.
word 1:	state and X-min
bits 0...3 are used internally to indicate the current state of an item - normal, selected, or deleted.
bits 4...15 are the minimum X coordinate bit position of the bounding box that the item occupies.
word 2:	Y-min
bits 0...15 are the minimum Y coordinate bit position of the bounding box that the item occupies.
word 3:	color and X-max
bits 0...3 are used to indicate the color associated with this item according to the following table:
00: Neutral		08: Brown
01: Red		09: Orange
02: Yellow		10: Lime
03: Green		11: Turquise
04: Cyan		12: Aqua
05: Violet		13: UltraViolet
06: Magenta	14: Pink
07: White		15: Smoke
bits 4...15 are the maximum X coordinate bit position of the bounding box that the item occupies.
word 4:	font, face, and Y-max
bits 0...3 are used to indicate the "font" associated with this item.  Font values are interpreted according to the following table:
00: Font 0 
01: Font 0 with "boldness" opposite to default value in profile
02: Font 1 
03: Font 1 with "boldness" opposite to default value in profile
04: Font 2 
05: Font 2 with "boldness" opposite to default value in profile
06: Font 3 
07: Font 3 with "boldness" opposite to default value in profile
08: Font 4 macro
09: Font 5 macro
10: Font 6 macro
11: Font 7 macro
12: Font 8 macro
13: Font 9 macro
14: A line with lingth and width indicated by preceeding coordinates
15: A background with area indicated by preceeding coordinates
bit 4 is used to indicate the "italics" opposite to default value in profile.  This bit only has significance if the font value is 0 through 7.
bits 5...15 are the maximum Y coordinate bit position of the bounding box that the item occupies.
word 5 etc:	optional string
If the preceeding word indicated an item of fonts 0 through 13, then additional words are required to define the characters in the item string.  This is done with a BCPL string definition, that is, the left byte of word 5 is the number of characters in the string, the right byte is the first character.  Additional words are appended as needed to contain the specified number of character bytes.
All coordinate value are expressed in "Alto Screen" units and are referneced to the upper left hand corner of the screen.
Notice that descriptions of library fonts 5 through 9 characters are not defined within this Sil file.  A table is filled in by Sil during input, and later the library files indicated in the user profile are opened, and the front of the file is scanned for items defining the required character codes for each of the library fonts characters.
This boils down to the following Cedar declarations for reading a Sil file.
For convenience we introduce the following font subranges.
LibraryFile: TYPE ~ [5..9];	declared in the definitions
InternalMacroFonts: TYPE ~ [8..13];
InternalBoxFonts: TYPE ~ [14..15];
internalFileMacroFont: InternalFonts ~ 8;
foregroundBoxFont: InternalFonts ~ 14;
backgroundBoxFont: InternalFonts ~ 15;
Storage of fonts.
Storage of macros.
File name towahboo.
Takes any name in any format and produces a full Sil file names in slash convention and a proper name (base). A Chipndale name is not produced because this is already done by Chipndale.
A small utility.
Reading a design.
Reads a file containing a Sil model and makes it avalilable as a Chipndale design 'silDesign' with specific cells 'silDesignCells'.
Chipndale requires that the libraries be reloaded for every design.
Reading a library file.
Reads all macros from a macro disk file and stores them into the Chipndale cells. The design 'cells' additionally contains a synopsis of the cells it contains. For normal usage, 'cells' is not needed.
Libray may already have been converted.
Build Chipnsil design name.
Build the Sil library name.
Check whether the library file already exists in Chipndale format and read it if this is the case.
Read in the the library file specified and convert it.
Write the library to disk, if necessary.
Gets from the user profile the fonts and makes the names for the Chipndale fonts. For the moment we consider only the display font, as Cedar Sil does. The chipndale fonts are made only when they are referenced the first time.
Takes the coarse name as it is specified in the user profile, and produces one with the 'bold' (B) attribute reversed as well as one with the 'italic' (I) attibute. The 'narrow' (N) attribute is ignored.
Fix boldness attribute.
Add an italic attribute if none is present.
Build the new font names.
Get the true font names from the profile.
Transforms all Sil macros to Chipndale cells. If a macro contains a macro from another macro file, the following policy is adopted: We try to import it an abort if we fail to do so.
Produces a Chipndale object from a Sil macro. The return parameter is necessary for the recursion.
TYPE = ActionType.
Imports a string of cells from another library. It is guaranteed that the library is already imported.
THIS ERROR REALLY MIGHT HAPPEN
A file macro is one that is not in a library file, but rather in the file containing the Sil model. Externally it is referred to as a character of font 4.
Import cell from specified design.
Sil first displays all background rectangles, then the foreground rectangles.
To avoid unnecessary recursion, we convert first the true macros and last the main object.
The macro is not empty and has not been converted yet.
The mainObject is not empty and has not been converted yet.
Reads a single macro file.
Update bounding box of macro.
Attach item block to Sil object list
Return the Sil item block which appears next in the file being read.  Also, return the item block's name, which will be ' (space) for main pictures, and a printing character for item blocks which are part of macro definitions.

This procedure exists so it can be passed to Rope.FromProc, below.

Main of ReadItemBlock
-- name depends on whether is part of main picture ot macro.
-- state of item block (normal, selected, deleted) is ignored.
The item block can now be attached to the relative macro. We cannot work directly with cells, because we need the bounding box of the entire macro to convert the y coordinate.
Each library file contains a synopsis of all macros, stored as a main picture.
For library files this would be
synopsis _ ReadSilLibrary [5];
[] _ CDViewer.CreateViewer [design: synopsis]; CDOps.Redraw [synopsis] -- optional
Module initialization.
Edited on January 14, 1985 6:08:21 pm PST, by Beretta
Font handling adapted to new Chipndale interface.
Edited on January 15, 1985 2:14:43 pm PST, by Beretta
Substituted CD.Error by ERROR ABORTED in case the file is not found.
gbb September 4, 1985 4:13:19 pm PDT
Added toggles for behaviour. The strategy on the re-use of library files and on the dialogue about writing them onto disk can be changed by modifying convLibEachTime, verbose and recompiling.
Finding fonts is simpler because of the pseudo-server mechanism introduced with Cedar 6.0.
changes to: CDSilConversionImpl, ReadSilModel, ReadSilLibrary, MakeCDFont.
gbb September 6, 1985 12:19:09 pm PDT
Clean-up
changes to: DIRECTORY, CDSilConversionImpl, TechnologyIsCdsil, ReadSilModel, ReadSilLibrary, SetFonts, FixAttibutes (local of SetFonts), MakeCDFont, MacroToObject (local of ConvertSilFile), ExpandRope (local of MacroToObject, local of ConvertSilFile)
gbb October 14, 1985 4:45:17 pm PDT
The defaults in Cedar Sil have changed: added test for the new large Cedar Sil file format and abort if the case. The large format will have to implemented in some future.
changes to: CDSilConversionImpl: new constant, ReadSilFile: Added test for header2 = largeFormatFileByte2.

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