public bool LoadTables(BinaryReader reader)
{
var egt = new EGTReader();
bool success;
try
{
egt.Open(reader);
this.Restart();
success = true;
while (!(egt.EndOfFile() || success == false))
{
egt.GetNextRecord();
var recType = (EGTRecord)egt.RetrieveByte();
switch (recType)
{
case EGTRecord.Property:
{
// Index, Name, Value
var index = egt.RetrieveInt16();
egt.RetrieveString();
// Just discard
this.m_Grammar.SetValue(index, egt.RetrieveString());
break;
}
case EGTRecord.TableCounts:
{
// Symbol, CharacterSet, Rule, DFA, LALR
this.m_SymbolTable = new SymbolList(egt.RetrieveInt16());
this.m_CharSetTable = new CharacterSetList(egt.RetrieveInt16());
this.m_ProductionTable = new ProductionList(egt.RetrieveInt16());
this.m_DFA = new FAStateList(egt.RetrieveInt16());
this.m_LRStates = new LRStateList(egt.RetrieveInt16());
this.m_GroupTable = new GroupList(egt.RetrieveInt16());
break;
}
case EGTRecord.InitialStates:
{
// DFA, LALR
this.m_DFA.InitialState = (short)egt.RetrieveInt16();
this.m_LRStates.InitialState = (short)egt.RetrieveInt16();
break;
}
case EGTRecord.Symbol:
{
// #, Name, Kind
var index = (short)egt.RetrieveInt16();
var name = egt.RetrieveString();
var type = (SymbolType)egt.RetrieveInt16();
this.m_SymbolTable[index] = new Symbol(name, type, index);
break;
}
case EGTRecord.Group:
{
// #, Name, Container#, Start#, End#, Tokenized, Open Ended, Reserved, Count, (Nested Group #...)
var g = new Group();
int n;
var with1 = g;
var index = egt.RetrieveInt16();
// #
with1.Name = egt.RetrieveString();
with1.Container = this.SymbolTable()[egt.RetrieveInt16()];
with1.Start = this.SymbolTable()[egt.RetrieveInt16()];
with1.End = this.SymbolTable()[egt.RetrieveInt16()];
with1.Advance = (Group.AdvanceMode)egt.RetrieveInt16();
with1.Ending = (Group.EndingMode)egt.RetrieveInt16();
egt.RetrieveEntry();
// Reserved
var count = egt.RetrieveInt16();
for (n = 1; n <= count; n++)
{
with1.Nesting.Add(egt.RetrieveInt16());
}
// === Link back
g.Container.Group = g;
g.Start.Group = g;
g.End.Group = g;
this.m_GroupTable[index] = g;
break;
}
case EGTRecord.CharRanges:
{
// #, Total Sets, RESERVED, (Start#, End# ...)
var index = egt.RetrieveInt16();
egt.RetrieveInt16();
// Codepage
egt.RetrieveInt16();
egt.RetrieveEntry();
// Reserved
this.m_CharSetTable[index] = new CharacterSet();
while (!egt.RecordComplete())
{
this.m_CharSetTable[index].Add(
new CharacterRange((ushort)egt.RetrieveInt16(), (ushort)egt.RetrieveInt16()));
}
break;
}
case EGTRecord.Production:
{
// #, ID#, Reserved, (Symbol#, ...)
var index = egt.RetrieveInt16();
var headIndex = egt.RetrieveInt16();
egt.RetrieveEntry();
// Reserved
this.m_ProductionTable[index] = new Production(this.m_SymbolTable[headIndex], (short)index);
while (!egt.RecordComplete())
{
var symIndex = egt.RetrieveInt16();
this.m_ProductionTable[index].Handle().Add(this.m_SymbolTable[symIndex]);
}
break;
}
case EGTRecord.DFAState:
{
// #, Accept?, Accept#, Reserved (CharSet#, Target#, Reserved)...
var index = egt.RetrieveInt16();
var accept = egt.RetrieveBoolean();
var acceptIndex = egt.RetrieveInt16();
egt.RetrieveEntry();
// Reserved
if (accept)
{
this.m_DFA[index] = new FAState(this.m_SymbolTable[acceptIndex]);
}
else
{
this.m_DFA[index] = new FAState();
}
// (Edge chars, Target#, Reserved)...
while (!egt.RecordComplete())
{
var setIndex = egt.RetrieveInt16();
// Char table index
var target = egt.RetrieveInt16();
// Target
egt.RetrieveEntry();
// Reserved
this.m_DFA[index].Edges.Add(new FAEdge(this.m_CharSetTable[setIndex], target));
}
break;
}
case EGTRecord.LRState:
{
// #, Reserved (Symbol#, Action, Target#, Reserved)...
var index = egt.RetrieveInt16();
egt.RetrieveEntry();
// Reserved
this.m_LRStates[index] = new LRState();
// (Symbol#, Action, Target#, Reserved)...
while (!egt.RecordComplete())
{
var symIndex = egt.RetrieveInt16();
var action = egt.RetrieveInt16();
var target = egt.RetrieveInt16();
egt.RetrieveEntry();
// Reserved
this.m_LRStates[index].Add(
new LRAction(this.m_SymbolTable[symIndex], (LRActionType)action, (short)target));
}
break;
}
default:
// RecordIDComment
throw new ParserException(
"File Error. A record of type '" + (char)recType
+ "' was read. This is not a valid code.");
}
}
egt.Close();
}
catch (Exception ex)
{
throw new ParserException(ex.Message, ex, "LoadTables");
}
this.m_TablesLoaded = success;
return success;
}
public int Add(Group item)
{
return base.Add(item);
}