DIRECTORY
Atom USING [GetPropFromList],
Basics USING [BYTE],
BasicTime USING [GMT],
Commander USING [CommandProc, Register],
CommandTool USING [ParseToList],
Convert USING [CardFromRope, Error, RopeFromTime],
FileNames USING [CurrentWorkingDirectory],
FS USING [EnumerateForNames, NameProc, Error, StreamOpen],
Graph USING [CaretIndex, CaretSpec, ColorIndex, Entity, EntityGroup, EntityGroupList, EntityGroupRec, EntityHashSize, EntityList, EntityRec, FontIndex, GRAPH, GraphHandle, GraphProc, HashIndex, LastEntityColor, NestedEntities, NestedEntitiesList, NestedEntitiesRec, NumberOfColors, NumberOfFonts, ROPE, SegmentDataList, TargetSpec, Text, TextRec, Texts, ValueList, Viewer, XY],
GraphFileKeys,
GraphOps USING [AddCurve, AddText, AppendValues, Lock, NewGraph, Unlock],
GraphPrivate USING [BYTE, CharPair, FourChars, GraphStreamProc, MakeTable, PaintAll, ReadAsciiFile, RopeList, ShowChart, STREAM],
GraphUtil USING [AppendEGL, AppendEntityList, AppendTexts, HandleNotNil, InitSegAll, InitSegEnd, NewEntityId, NewGroupId, NewTextId, ReverseEntityList, ReplaceFileExt, ReverseTexts, ReverseValueList, UseMyColors, UseMyFonts, VanillaHandle],
IO USING [Close, EndOf, EndOfStream, Error, GetChar, GetIndex, int, PeekChar, PutFR, rope],
List USING [DReverse, Kill],
RefText USING [New, ObtainScratch, ReleaseScratch],
Rope USING [Equal, Fetch, Find, FromRefText, IsEmpty, Length, Substr],
ViewerOps USING [DestroyViewer];
GetGraph:
PUBLIC
PROC [handle: GraphHandle, file:
ROPE]
RETURNS [msg:
ROPE ←
NIL] = {
assume handle is already locked.
if no problem then return msg=nil.
IF file.IsEmpty[] THEN RETURN["No file specified."];
IF HandleNotNil[handle]
THEN {
s: STREAM ← NIL;
s ← FS. StreamOpen[file ! FS.Error => {msg ← error.explanation; CONTINUE} ];
IF msg =
NIL
THEN {
ENABLE {
SyntaxError => {
msg ← IO.PutFR["Syntax errorat [%g], %g.", IO.int[s.GetIndex[]], IO.rope[message]];
CONTINUE;
};
ReadBeyondEOF => {
msg ←
IO.PutFR["End of file at [%g], reading %g.",
IO.int[s.GetIndex[]], IO.rope[message]];
CONTINUE;
};
DataError => {
msg ← IO.PutFR["Error at [%g], %g.", IO.int[s.GetIndex[]], IO.rope[message]];
CONTINUE;
};
IO.EndOfStream => {
msg ← "End of file reached";
CONTINUE;
};
IO.Error => {
msg ←
IO.PutFR["%g at [%g].",
IO.rope[
SELECT ec
FROM
SyntaxError => "Syntax error",
Overflow => "Overflow in input conversion"
ENDCASE => IO.PutFR["IO Error # %g", IO.int[LOOPHOLE[ec, CARDINAL]]]],
IO.int[s.GetIndex[]]
];
CONTINUE;
};
ABORTED => {
msg ← "Graph aborted. ... ";
CONTINUE;
};
};
IF handle.controller #
NIL
THEN
IF handle.controller.table #
NIL
THEN {
ViewerOps.DestroyViewer[handle.controller.table];
handle.controller.table ← NIL;
};
handle.userEditAllowed ← FALSE;
msg ←
SELECT CheckFormat[s]
FROM
old => ReadPlotFile[handle, s],
binary => ReadGraphFile[handle, s],
ascii => ReadAsciiFile[handle, s],
ENDCASE => "Illegal graph file.";
};
handle.userEditAllowed ← TRUE;
IF handle.controller #
NIL
THEN {
IF file.Find["/", 1] > 1 OR file.Find["]"] > 1 THEN file ← "///Graph";
IF handle.controller.table =
NIL
THEN MakeTable[handle, ReplaceFileExt[file, "table"],
IF handle.controller.tableVisible THEN 0 ELSE 1000, 0];
};
IF s # NIL THEN s.Close[];
};
}; -- GetGraph
ReadPlotFile:
PROC[handle: GraphHandle, s:
STREAM]
RETURNS [msg:
ROPE ←
NIL] = {
OPEN handle;
assume handle is already locked.
groupId, valuesLength, nCurves: INT;
title, time, and file name.
title: ROPE ← GetRope[s];
time: ROPE ← Convert.RopeFromTime[GetTime[s]];
file: ROPE ← NARROW[Atom.GetPropFromList[s.propList, $Name]];
create graph with bounds
[handle, groupId] ← NewGraph[
fileName: file,
groupName: NIL,
comment: file,
xName: "X",
autoBounds: TRUE,
bounds: [GetReal[s], GetReal[s], GetReal[s], GetReal[s]],
oldGraph: handle
];
add texts
[] ← AddText[handle: handle,
rope: title, place: [0.5, 1.1], fontIndex: 2, justifX: center, justifY: bottom];
[] ← AddText[handle: handle,
rope: time, place: [1.0, -0.35], fontIndex: 1, justifX: right, justifY: bottom];
[] ← AddText[handle: handle,
rope: file, place: [0, -0.35], fontIndex: 1, justifX: left, justifY: bottom];
enlist curves
nCurves ← GetCardinal[s];
FOR i:
INT
IN [1..nCurves]
DO
[] ← AddCurve[handle: handle, groupId: groupId, name: GetRope[s],
colorIndex: ((i-1) MOD LastEntityColor) + 1];
ENDLOOP;
add cross-sections
valuesLength ← GetCardinal[s];
FOR i:
INT
IN [1..valuesLength]
DO
x: REAL ← GetReal[s];
yvalues: ValueList ← NIL;
FOR j:
INT
IN [1..nCurves]
DO
yvalues ← CONS[GetReal[s], yvalues];
ENDLOOP;
AppendValues[handle, groupId, x, yvalues];
ENDLOOP;
}; -- ReadPlotFile
ReadGraphFile:
PROC [handle: GraphHandle, s:
STREAM]
RETURNS [msg:
ROPE ←
NIL] = {
OPEN handle;
assume handle is already locked.
The format could have been more compact. But it is easier to allow for upward/backward compatibility this way.
graph.fileName ← NARROW[Atom.GetPropFromList[s.propList, $Name]];
WHILE
NOT s.EndOf[]
DO
SELECT GetByte[s]
FROM
NameKey => [] ← GetRope[s]; -- graph.fileName is already initialized above.
TextsKey => GetTexts[s, handle];
CaretsKey => GetCarets[s, graph];
ShowSlopeKey => graph.showSlope ← GetBool[s];
TargetsKey => GetTargets[s, graph];
GridsKey => GetGrids[s, graph];
DivisionsKey => GetDivisions[s, graph];
BoundsKey => GetBounds[s, graph];
AutoKey => graph.auto ← [GetBool[s], GetBool[s]];
ColorsKey => GetColors[s, graph];
FontsKey => GetFonts[s, graph];
EntityGroupListKey => GetEntityGroupList[s, handle];
EndOfRecordKey => EXIT; -- later we can read more than one graphs at a time.
ENDCASE => SIGNAL SyntaxError["Graph"];
ENDLOOP;
draw some of the curves.
IF handle.chart.viewer = NIL THEN ShowChart[handle]
ELSE {
UseMyColors[handle];
UseMyFonts[handle];
PaintAll[handle, TRUE, TRUE, TRUE];
};
handle should be unlocked by caller of this proc.
}; -- ReadGraphFile
GetTexts:
PROC [s:
STREAM, handle: GraphHandle] = {
reads in graph.texts in the reversed order.
texts: Texts ← NIL;
DO
SELECT GetByte[s]
FROM
EndOfListKey => EXIT;
TextKey => texts ← CONS[GetText[s, handle], texts]; -- 1
ENDCASE => SIGNAL SyntaxError["Texts"];
ENDLOOP;
handle.allTexts ← AppendTexts[handle.allTexts, ReverseTexts[texts, FALSE]];
handle.graph.texts ← AppendTexts[handle.graph.texts, ReverseTexts[texts, TRUE]];
}; -- GetTexts
GetText:
PROC [s:
STREAM, handle: GraphHandle]
RETURNS [text: Text ←
NIL] = {
text ← NEW[TextRec ← []];
DO
SELECT GetByte[s]
FROM
NameKey => text.text ← GetRope[s]; -- 1
PlaceKey => text.place ← [GetReal[s], GetReal[s]]; -- 2
FontIndexKey => text.fontIndex ← GetByte[s]; -- 3
ColorIndexKey => text.colorIndex ← GetByte[s]; -- 4
RotationKey => text.rotation ← GetReal[s]; -- 5
JustificationsKey => {
-- 6
WHILE
NOT s.EndOf[]
DO
byte: BYTE;
SELECT GetByte[s]
FROM
XKey => {
-- 1
byte ← GetByte[s];
IF byte
IN [LeftKey..RightKey]
THEN text.justifX ←
SELECT byte
FROM
-- 1, 2, 3.
LeftKey => left, CenterKey => center, ENDCASE => right
ELSE SIGNAL SyntaxError["X Justification"];
};
YKey => {
-- 2
byte ← GetByte[s];
IF byte
IN [TopKey..BottomKey]
THEN text.justifY ←
SELECT byte
FROM
-- 1, 2, 3.
TopKey => top, CenterKey => center, ENDCASE => bottom
ELSE SIGNAL SyntaxError["Y Justification"];
};
EndOfRecordKey => EXIT;
ENDCASE => SIGNAL SyntaxError["Justifications"];
ENDLOOP;
};
TextIdKey => {text.id ← NewTextId[handle, GetInt[s]]}; -- 7
EndOfRecordKey => EXIT;
ENDCASE => SIGNAL SyntaxError["Text"];
ENDLOOP;
}; -- GetText
GetCarets: GraphStreamProc = {
byte: BYTE;
WHILE
NOT s.EndOf[]
DO
SELECT (byte ← GetByte[s])
FROM
EndOfRecordKey => EXIT;
IN [PrimaryKey..TextCaretKey] => {
-- 1, 2, 3.
index: CaretIndex ←
SELECT byte
FROM
PrimaryKey => primary, SecondaryKey => secondary, ENDCASE => text;
GetCaret[s, graph.caret[index]];
};
ENDCASE => SIGNAL SyntaxError["Carets"];
ENDLOOP;
}; -- GetCarets
GetCaret:
PROC [s:
STREAM, spec: CaretSpec] = {
WHILE
NOT s.EndOf[]
DO
SELECT GetByte[s]
FROM
EndOfRecordKey => EXIT;
PlaceKey => spec.place ← [GetReal[s], GetReal[s]]; -- 2
OnKey => spec.on ← GetBool[s]; -- 12
ENDCASE => SIGNAL SyntaxError["Caret"];
ENDLOOP;
}; -- GetCaret
GetTargets: GraphStreamProc = {
byte: BYTE;
WHILE
NOT s.EndOf[]
DO
SELECT (byte ← GetByte[s])
FROM
EndOfRecordKey => EXIT;
IN [XKey..YKey] => {
-- 1, 2.
xy: XY ← IF byte = XKey THEN x ELSE y;
GetTarget[s, graph.target[xy]];
};
ENDCASE => SIGNAL SyntaxError["Targets"];
ENDLOOP;
}; -- GetTargets
GetTarget:
PROC [s:
STREAM, spec: TargetSpec] = {
WHILE
NOT s.EndOf[]
DO
SELECT GetByte[s]
FROM
EndOfRecordKey => EXIT;
ValueKey => spec.value ← GetReal[s]; -- 1
WidthKey => spec.width ← GetReal[s]; -- 2
ColorIndexKey => spec.colorIndex ← GetByte[s]; -- 4, need proctection.
OnKey => spec.on ← GetBool[s]; -- 12
ENDCASE => SIGNAL SyntaxError["Target"];
ENDLOOP;
}; -- GetTarget
GetGrids: GraphStreamProc = {
byte: BYTE;
WHILE
NOT s.EndOf[]
DO
SELECT (byte ← GetByte[s])
FROM
EndOfRecordKey => EXIT;
IN [XKey..YKey] => {
-- 1, 2
xy: XY ← IF byte = XKey THEN x ELSE y;
WHILE
NOT s.EndOf[]
DO
SELECT GetByte[s]
FROM
EndOfRecordKey => EXIT;
OnKey => graph.grids[xy] ← GetBool[s]; -- 12
ENDCASE => SIGNAL SyntaxError["Grid"];
ENDLOOP;
};
ENDCASE => SIGNAL SyntaxError["Grids"];
ENDLOOP;
}; -- GetGrids
GetDivisions: GraphStreamProc = {
byte: BYTE;
WHILE
NOT s.EndOf[]
DO
SELECT (byte ← GetByte[s])
FROM
EndOfRecordKey => EXIT;
IN [XKey..YKey] => {
-- 1, 2
xy: XY ← IF byte = XKey THEN x ELSE y;
WHILE
NOT s.EndOf[]
DO
SELECT GetByte[s]
FROM
EndOfRecordKey => EXIT;
AutoKey => graph.auto[divisions] ← GetBool[s]; -- 9
DivisionsKey => graph.division[xy] ← GetByte[s]; -- 7
ENDCASE => SIGNAL SyntaxError["Division"];
ENDLOOP;
};
ENDCASE => SIGNAL SyntaxError["Divisions"];
ENDLOOP;
}; -- GetDivisions
GetBounds: GraphStreamProc = {
byte: BYTE;
WHILE
NOT s.EndOf[]
DO
SELECT (byte ← GetByte[s])
FROM
EndOfRecordKey => EXIT;
IN [XKey..YKey] => {
-- 1, 2
xy: XY ← IF byte = XKey THEN x ELSE y;
WHILE
NOT s.EndOf[]
DO
SELECT GetByte[s]
FROM
EndOfRecordKey => EXIT;
AutoKey => graph.auto[bounds] ← GetBool[s]; -- 9
MaxKey =>
IF xy = x
THEN graph.bounds.xmax ← GetReal[s]
-- 1
ELSE graph.bounds.ymax ← GetReal[s];
MinKey =>
IF xy = x
THEN graph.bounds.xmin ← GetReal[s]
-- 2
ELSE graph.bounds.ymin ← GetReal[s];
ENDCASE => SIGNAL SyntaxError["Bound"];
ENDLOOP;
};
ENDCASE => SIGNAL SyntaxError["Bounds"];
ENDLOOP;
}; -- GetBounds
GetColors: GraphStreamProc = {
byte: BYTE;
WHILE
NOT s.EndOf[]
DO
SELECT (byte ← GetByte[s])
FROM
EndOfRecordKey => EXIT;
IN [1..NumberOfColors] => {
index: ColorIndex ← byte - 1;
GetColor[s, graph, index];
};
ENDCASE => SIGNAL SyntaxError["Colors"];
ENDLOOP;
}; -- GetColors
GetColor:
PROC [s:
STREAM, graph:
GRAPH, index: ColorIndex] = {
WHILE
NOT s.EndOf[]
DO
SELECT GetByte[s]
FROM
EndOfRecordKey => EXIT;
RKey => graph.color[index].R ← GetReal[s]; -- 1
GKey => graph.color[index].G ← GetReal[s]; -- 2
BKey => graph.color[index].B ← GetReal[s]; -- 3
ENDCASE => SIGNAL SyntaxError["Color"];
ENDLOOP;
}; -- GetColor
GetFonts: GraphStreamProc = {
byte: BYTE;
WHILE
NOT s.EndOf[]
DO
SELECT (byte ← GetByte[s])
FROM
EndOfRecordKey => EXIT;
IN [1..NumberOfFonts] => {
index: FontIndex ← byte - 1;
GetFont[s, graph, index];
};
ENDCASE => SIGNAL SyntaxError["Fonts"];
ENDLOOP;
}; -- GetFonts
GetFont: PROC [s: STREAM, graph: GRAPH, index: FontIndex] = {
WHILE
NOT s.EndOf[]
DO
SELECT GetByte[s]
FROM
EndOfRecordKey => EXIT;
NameKey => graph.font[index].family ← GetRope[s]; -- 1
BoldKey => graph.font[index].bold ← GetBool[s]; -- 2
ItalicKey => graph.font[index].italic ← GetBool[s]; -- 3
VFontSizeKey => graph.font[index].vFontSize ← GetInt[s]; -- 4
PFontScaleKey => graph.font[index].pFontScale ← GetReal[s]; -- 5
ENDCASE => SIGNAL SyntaxError["Font"];
ENDLOOP;
}; -- GetFonts
GetEntityGroupList:
PROC [s:
STREAM, handle: GraphHandle] = {
OPEN handle;
egl, t1, t2: EntityGroupList ← NIL;
DO
SELECT GetByte[s]
FROM
EndOfListKey => EXIT;
EntityGroupKey => t1 ← CONS[GetEntityGroup[s, handle], t1]; -- 4
ENDCASE => SIGNAL SyntaxError["EntityGroupList"];
ENDLOOP;
reverse it.
FOR t2 ← t1, t2.rest
UNTIL t2 =
NIL
DO
egl ← CONS[t2.first, egl];
ENDLOOP;
InitSomeCurves[handle, egl]; -- init up to six curves in this graph file to be displayed.
entityGroupList ← AppendEGL[entityGroupList, egl]; -- append egl.
cleanup t1
TRUSTED {List.Kill[LOOPHOLE[t1]]};
}; -- GetEntityGroupList
GetEntityGroup:
PROC [s:
STREAM, handle: GraphHandle]
RETURNS [eg: EntityGroup] = {
eg ← NEW[EntityGroupRec ← []];
DO
SELECT GetByte[s]
FROM
NameKey => eg.name ← GetRope[s]; -- 1
EntityKey => eg.x ← GetEntity[s, handle, eg, NIL]; -- 2
NestedEntitiesKey => eg.ys ← GetNestedEntities[s, handle, eg, NIL]; -- 5
GroupIdKey => eg.id ← NewGroupId[handle, GetInt[s]]; -- 6
LengthKey => eg.length ← GetInt[s]; -- 7
CrossSectionsKey => GetCrossSections[s, eg];
EndOfRecordKey => EXIT;
ENDCASE => SIGNAL SyntaxError["EntityGroup"];
ENDLOOP;
GetEntityList:
PROC [s:
STREAM, handle: GraphHandle, group: EntityGroup, father: NestedEntities]
RETURNS [el: EntityList ←
NIL] = {
-- without getting the values, for now.
DO
SELECT GetByte[s]
FROM
EndOfListKey => EXIT;
EntityKey => el ← CONS[GetEntity[s, handle, group, father], el]; -- 2
ENDCASE => SyntaxError["EntityList"];
ENDLOOP;
el ← ReverseEntityList[el, TRUE]; -- resume the order.
}; -- GetEntityList
GetEntity:
PROC [s:
STREAM, handle: GraphHandle, eg: EntityGroup, father: NestedEntities ←
NIL]
RETURNS [entity: Entity ←
NIL] = {
hashIndex: [0..EntityHashSize);
entity ← NEW[EntityRec ← [group: eg, parent: father]];
DO
SELECT GetByte[s]
FROM
NameKey => entity.name ← GetRope[s]; -- 1
CommentKey => entity.comment ← GetRope[s]; -- 11
ColorIndexKey => entity.colorIndex ← GetByte[s]; -- 4
MarkKey => {
-- 3
byte: BYTE ← GetByte[s];
IF byte
IN [NoneKey..PercentKey]
THEN
-- 1 .. 7
entity.mark ←
SELECT byte
FROM
NoneKey => none, RoundKey => round, SquareKey => square,
DiamondKey => diamond, CrossKey => cross, DollarKey => dollar,
ENDCASE => percent
ELSE SIGNAL SyntaxError["Mark"];
};
WidthKey => entity.width ← GetReal[s]; -- 2
ValuesKey => [entity.oldValues, entity.lastValue] ← GetValueList[s]; -- 5
EntityIdKey => entity.id ← NewEntityId[handle, GetInt[s]]; -- 7
EndOfRecordKey => EXIT;
ENDCASE => SIGNAL SyntaxError["Entity"];
ENDLOOP;
hashIndex ← entity.id MOD EntityHashSize;
handle.entityHash[hashIndex] ← CONS[entity, handle.entityHash[hashIndex]];
}; -- GetEntity
GetValueList:
PROC [s:
STREAM]
RETURNS [vl, last: ValueList ←
NIL] = {
length: INT ← GetInt[s];
FOR i:
INT
IN [0..length)
DO
vl ← CONS[GetReal[s], vl];
ENDLOOP;
[vl, last] ← ReverseValueList[vl, TRUE];
GetNestedEntitiesList:
PROC [s:
STREAM, handle: GraphHandle, group: EntityGroup, father: NestedEntities ←
NIL]
RETURNS [nel: NestedEntitiesList ←
NIL] = {
tnel: NestedEntitiesList ← NIL;
DO
SELECT GetByte[s]
FROM
EndOfListKey => EXIT;
NestedEntitiesKey => tnel ←
CONS[
-- 5
GetNestedEntities[s, handle, group, father], tnel];
ENDCASE => SyntaxError["NestedEntitiesList"];
ENDLOOP;
reverse it.
FOR ttnel: NestedEntitiesList ← tnel, ttnel.rest
UNTIL ttnel =
NIL
DO
nel ← CONS[ttnel.first, nel];
ENDLOOP;
clean up.
WHILE tnel #
NIL
DO
next: NestedEntitiesList ← tnel.rest;
tnel.first ← NIL;
tnel.rest ← NIL;
tnel ← next;
ENDLOOP;
}; -- GetNestedEntitiesList
GetNestedEntities:
PROC [s:
STREAM, handle: GraphHandle, group: EntityGroup, father: NestedEntities ←
NIL]
RETURNS [ne: NestedEntities] = {
ne ← NEW[NestedEntitiesRec ← [parent: father]];
DO
SELECT GetByte[s]
FROM
NameKey => ne.name ← GetRope[s]; -- 1
CommentKey => ne.comment ← GetRope[s]; -- 11
EntityListKey => ne.entityList ← GetEntityList[s, handle, group, father]; -- 3
NELKey => ne.children ← GetNestedEntitiesList[s, handle, group, ne]; -- 4
EndOfRecordKey => EXIT;
ENDCASE => SIGNAL SyntaxError["NestedEntities"];
ENDLOOP;
}; -- GetNestedEntities
GetCrossSections:
PROC [s:
STREAM, group: EntityGroup] = {
AddValuesToEL:
PROC [entityList: EntityList] = {
FOR el: EntityList ← entityList, el.rest
UNTIL el =
NIL
DO
vl: ValueList ← CONS[GetReal[s], NIL];
el.first.lastValue.rest ← vl;
el.first.lastValue ← vl;
ENDLOOP;
}; -- AddValuesToEL
AddValuesToNEL:
PROC [nestedEntityList: NestedEntitiesList] = {
FOR nel: NestedEntitiesList ← nestedEntityList, nel.rest
UNTIL nel =
NIL
DO
AddValuesToEL[nel.first.entityList];
AddValuesToNEL[nel.first.children];
ENDLOOP;
}; -- AddValuesToNEL
DO
-- error if eof is hit inside the loop;
SELECT GetByte[s]
FROM
EndOfListKey => EXIT;
TailsKey => {
-- 8
vl: ValueList ← CONS[GetReal[s], NIL];
group.x.lastValue.rest ← vl;
group.x.lastValue ← vl;
AddValuesToEL[group.ys.entityList];
AddValuesToNEL[group.ys.children];
};
ENDCASE => SyntaxError["CrossSection"];
ENDLOOP;
}; -- GetCrossSections
InitSomeCurves:
PROC [handle: GraphHandle, newEgl: EntityGroupList] = {
OPEN handle;
newEL: EntityList ← NIL;
InitSomeEntity:
PROC [ne: NestedEntities, count:
INT]
RETURNS [newCount:
INT] = {
newCount ← count;
FOR el: EntityList ← ne.entityList, el.rest
UNTIL el = NIL OR newCount >= LastEntityColor/2 DO
entity: Entity ← el.first;
InitSegAll[entity];
newEL ← CONS[entity, newEL];
newCount ← newCount + 1;
ENDLOOP;
FOR nel: NestedEntitiesList ← ne.children, nel.rest
UNTIL nel = NIL OR newCount >= LastEntityColor/2 DO
newCount ← InitSomeEntity[nel.first, newCount];
ENDLOOP;
}; -- InitSomeEntity
curveCount: CARDINAL ← 0;
FOR egl: EntityGroupList ← newEgl, egl.rest
UNTIL egl =
NIL
OR curveCount >= LastEntityColor/2
DO
InitSegEnd[egl.first.x];
curveCount ← InitSomeEntity[egl.first.ys, curveCount];
ENDLOOP;
graph.entityList ← AppendEntityList[graph.entityList, ReverseEntityList[newEL, TRUE]];
}; -- InitSomeCurves
CheckFormat:
PROC [stream:
STREAM]
RETURNS[format: FileFormat ← illegal] = {
firstChar: CHAR ← stream.PeekChar[];
IF firstChar = 0C
THEN {
rope: ROPE;
rope ← GetRope[stream! ReadBeyondEOF => {rope ← NIL; CONTINUE}];
IF
NOT rope.IsEmpty[]
THEN
SELECT
TRUE
FROM
rope.Equal["* binary"] => format ← old;
rope.Equal["binary graph"] => format ← binary;
ENDCASE; -- illegal
}
ELSE format ← ascii;
}; -- CheckFormat
reading routines
scratch for GetRope
myScratch: REF TEXT ← RefText.New[256];
GetRope:
PROC [stream:
STREAM]
RETURNS [rope:
ROPE] = {
length: NAT = GetCardinal[stream];
text: REF TEXT ← IF length > 256 THEN RefText.ObtainScratch[length] ELSE myScratch;
FOR i:
NAT
IN [0..length)
DO
IF stream.EndOf[]
THEN
SIGNAL ReadBeyondEOF[
IO.PutFR["%gth character of a rope of length %g.", IO.int[i+1], IO.int[length]]];
text[i] ← stream.GetChar[];
ENDLOOP;
text.length ← length;
rope ← Rope.FromRefText[text];
IF length > 256 THEN RefText.ReleaseScratch[text];
}; -- GetRope
GetTime:
PROC [stream:
STREAM]
RETURNS [BasicTime.
GMT] = {
RETURN[LOOPHOLE[GetLongWord[stream, " a BasicTime.GMT"], BasicTime.GMT]];
}; -- GetTime
GetBool:
PROC [stream:
STREAM]
RETURNS [bool:
BOOL ←
FALSE] = {
SELECT GetByte[stream]
FROM
TrueKey => bool ← TRUE;
FalseKey => bool ← FALSE;
ENDCASE => SIGNAL SyntaxError["Boolean"];
}; -- GetBool
GetByte:
PROC [stream:
STREAM]
RETURNS [
BYTE] = {
RETURN[LOOPHOLE[stream.GetChar[], BYTE]];
}; -- GetByte
GetInt:
PROC [stream:
STREAM]
RETURNS [
INT] = {
RETURN[LOOPHOLE[GetLongWord[stream, " an INT"], INT]];
}; -- GetInt
GetReal:
PROC [stream:
STREAM]
RETURNS [
REAL] = {
RETURN[LOOPHOLE[GetLongWord[stream, " a real number"], REAL]];
}; -- GetReal
GetCardinal:
PROC [stream:
STREAM]
RETURNS [
CARDINAL] = {
pair: CharPair;
pair.high ← MyGetChar[stream, "1st byte of a cardinal"];
pair.low ← MyGetChar[stream, "2nd byte of a cardinal"];
RETURN[LOOPHOLE[pair, CARDINAL]];
}; -- GetCardinal
GetLongWord:
PROC [stream:
STREAM, info:
ROPE]
RETURNS [chars: FourChars] = {
chars.lh ← MyGetChar[stream, "1st byte of", info];
chars.ll ← MyGetChar[stream, "2nd byte of", info];
chars.hh ← MyGetChar[stream, "3rd byte of", info];
chars.hl ← MyGetChar[stream, "4th byte of", info];
}; -- GetLongWord
MyGetChar:
PROC [stream:
STREAM, info1, info2:
ROPE ←
NIL]
RETURNS [
CHAR] = {
IF stream.EndOf[]
THEN
SIGNAL ReadBeyondEOF[
IO.PutFR["%g%g.", IO.rope[info1], IO.rope[info2]]];
RETURN[stream.GetChar[]];
}; -- MyGetChar
Commander.Register["Graph", GraphFiles, "Graph <graph file list>, reviews the graphs in the files. See GraphDoc.tioga for more information."];
}.