/// <summary>
/// Loads grammar from the binary reader.
/// </summary>
private void Load(LoadContext context)
{
string headerString = context.ReadHeaderString();
// Trace.WriteLine(headerString, "Reading header");
Match headerMatch = FileHeader.Match(headerString);
if (!headerMatch.Success)
{
throw new FileLoadException("The File Header is invalid or unsupported: " + headerString);
}
switch (headerMatch.Groups["version"].Value)
{
case "1.0":
fileVersion = CgtVersion.V1_0;
break;
case "5.0":
fileVersion = CgtVersion.V5_0;
break;
default:
throw new FileLoadException(string.Format("The file format version {0} is not unsupported", headerMatch.Groups["version"].Value));
}
while (context.HasMoreData())
{
CgtRecordType recordType = context.ReadNextRecord();
/// Trace.WriteLine(recordType, "Reading record");
switch (recordType)
{
case CgtRecordType.Parameters:
ReadHeader(context);
break;
case CgtRecordType.Property:
ReadProperty(context);
break;
case CgtRecordType.Groups:
ReadGroup(context);
break;
case CgtRecordType.TableCountsEnhanced:
ReadTableCounts(context, true);
break;
case CgtRecordType.TableCounts:
ReadTableCounts(context, false);
break;
case CgtRecordType.Initial:
ReadInitialStates(context);
break;
case CgtRecordType.Symbols:
ReadSymbol(context);
break;
case CgtRecordType.Charsets:
ReadCharset(context);
break;
case CgtRecordType.PackedCharsets:
if (fileVersion == CgtVersion.V1_0)
{
ReadPackedCharset(context);
}
else
{
ReadRangeCharset(context);
}
break;
case CgtRecordType.Rules:
ReadRule(context);
break;
case CgtRecordType.DfaStates:
ReadDfaState(context);
break;
case CgtRecordType.LRStates:
ReadLRState(context);
break;
default:
throw new FileLoadException("Invalid record type");
}
}
dfaInitialState = dfaStateTable[context.DfaInitialStateIndex];
startSymbol = symbolTable[context.StartSymbolIndex];
lalrInitialState = lalrStateTable[context.LrInitialState];
FixupGroups(context);
}
