public CGTContent(CGTStructure structure)
{
if (structure.Records.Count < 3)
throw new CGTContentException("File does not have enough records");
parameters = new Parameters(structure.Records[0]);
tableCounts = new TableCounts(structure.Records[1]);
int initialStatesStart = 2;
int characterSetStart = initialStatesStart + 1;
int symbolStart = characterSetStart + TableCounts.CharacterSetTable;
int ruleStart = symbolStart + TableCounts.SymbolTable;
int dfaStart = ruleStart + TableCounts.RuleTable;
int lalrStart = dfaStart + TableCounts.DFATable;
int specifiedRecordCount = lalrStart + TableCounts.LALRTable;
if (structure.Records.Count != specifiedRecordCount)
throw new CGTContentException("Invalid number of records");
characterSetTable = new CharacterSetTable(structure,
characterSetStart,
TableCounts.CharacterSetTable);
symbolTable = new SymbolTable(structure,
symbolStart,
TableCounts.SymbolTable);
ruleTable = new RuleTable(structure,
ruleStart,
TableCounts.RuleTable);
initialStates = new InitialStatesRecord(structure.Records[initialStatesStart]);
dfaStateTable = new DFAStateTable(structure,dfaStart,TableCounts.DFATable);
lalrStateTable = new LALRStateTable(structure,lalrStart,TableCounts.LALRTable);
}
public DFAStateTable(CGTStructure structure, int start, int count)
{
list = new ArrayList();
for (int i = start; i < start + count; i++)
{
DFAStateRecord dfaState = new DFAStateRecord(structure.Records[i]);
list.Add(dfaState);
}
}
public RuleTable(CGTStructure structure, int start, int count)
{
list = new ArrayList();
for (int i=start;i<start+count;i++)
{
RuleRecord ruleRecord = new RuleRecord(structure.Records[i]);
list.Add(ruleRecord);
}
}
public SymbolTable(CGTStructure cgtStructure, int start, int count)
{
list = new ArrayList();
for (int i=start;i<start+count;i++)
{
SymbolRecord symbol = new SymbolRecord(cgtStructure.Records[i]);
list.Add(symbol);
}
}
public CharacterSetTable(CGTStructure structure, int start, int count)
{
list = new ArrayList();
for (int i=start;i<start+count;i++)
{
CharacterSetRecord charSet = new CharacterSetRecord(structure.Records[i]);
list.Add(charSet);
}
}
public LALRStateTable(CGTStructure structure, int start, int count)
{
list = new ArrayList();
for (int i = start; i < start + count; i++)
{
LALRStateRecord lalrState = new LALRStateRecord(structure.Records[i]);
list.Add(lalrState);
}
}
private void Reset()
{
stream = null;
structure = null;
content = null;
dfaStates = null;
parserStates = null;
symbols = null;
rules = null;
}
/// <summary>
/// Reads a CGT and creates all the objects needed to create
/// a tokenizer and parser at a later time.
/// </summary>
/// <param name="stream">The CGT stream.</param>
private void ReadFile(Stream stream)
{
try
{
Reset();
this.stream = stream;
CalithaBinReader reader = new CalithaBinReader(stream);
string header = "";
try
{
header = reader.ReadUnicodeString();
if (! header.StartsWith("GOLD"))
throw new CGTStructureException("File header is invalid");
}
catch (EndOfStreamException e)
{
throw new CGTStructureException("File header is invalid",e);
}
RecordCollection records = new RecordCollection();
while (!(stream.Position == stream.Length))
{
records.Add(ReadRecord(reader));
}
structure = new CGTStructure(header,records);
content = new CGTContent(structure);
dfaStates = CreateDFAStates(content);
parserStates = CreateParserStates(content);
}
finally
{
stream.Close();
}
}