public RubyToken Decode(string file, RubyDecoderOptions options)
{
using (var stream = File.Open(file, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
return(Decode(stream, options));
}
}
public RubyToken Decode(Stream stream, RubyDecoderOptions options)
{
using (var reader = new BinaryReader(stream))
{
if (reader.ReadInt16() == 0x0804)
{
return(ReadEntry(new ReadContext
{
Reader = reader
},
options ?? new RubyDecoderOptions()));
}
}
return(null);
}
internal static RubyToken ReadEntry(ReadContext context, RubyDecoderOptions options)
{
RubyClass rubyClass;
int fieldCount;
RubyObject objectEntry;
var type = (RubyType)context.Reader.ReadByte();
switch (type)
{
case RubyType.Nil:
return(new RubyValue((object)null));
case RubyType.TypeLink:
var dataId = (int)ReadNumber(context);
if (context.Data.Count > dataId)
{
return(context.Data[dataId]);
}
else
{
throw new Exception("Failed to locate linked data");
}
case RubyType.Array:
var length = (int)ReadNumber(context);
var arrayEntry = new RubyArray
{
Array = new List <RubyToken>(length)
};
context.Data.Add(arrayEntry);
for (var index = 0; index < length; index++)
{
arrayEntry.Array.Add(ReadEntry(context, options));
}
return(arrayEntry);
case RubyType.Object:
rubyClass = ReadSymbolDefinition(context);
fieldCount = (int)ReadNumber(context);
objectEntry = new RubyObject
{
RubyClass = rubyClass,
Properties = new Dictionary <string, RubyToken>(fieldCount)
};
context.Data.Add(objectEntry);
for (var fieldIndex = 0; fieldIndex < fieldCount; fieldIndex++)
{
var keySymbol = ReadSymbolDefinition(context);
var value = ReadEntry(context, options);
objectEntry.Properties.Add(keySymbol.Name.TrimStart('@'), value);
}
return(objectEntry);
case RubyType.UserDefined:
rubyClass = ReadSymbolDefinition(context);
if (options.UserDecoders != null && options.UserDecoders.TryGetValue(rubyClass.Name, out var decoder))
{
ReadNumber(context);
var userDefinedEntry = decoder(context.Reader);
userDefinedEntry.RubyClass = rubyClass;
context.Data.Add(userDefinedEntry);
return(userDefinedEntry);
}
else
{
throw new Exception($"User defined type not handled: {rubyClass.Name}");
}
case RubyType.Hash:
fieldCount = (int)ReadNumber(context);
objectEntry = new RubyObject
{
RubyClass = new RubyClass {
Name = "encoder:Hash"
},
Properties = new Dictionary <string, RubyToken>(fieldCount)
};
context.Data.Add(objectEntry);
for (var fieldIndex = 0; fieldIndex < fieldCount; fieldIndex++)
{
var key = ReadEntry(context, options);
var value = ReadEntry(context, options);
objectEntry.Properties.Add(key.ToString(), value);
}
return(objectEntry);
case RubyType.Number:
return(new RubyValue(ReadNumber(context)));
case RubyType.Decimal:
var rubyFloat = new RubyValue(ReadFloat(context));
context.Data.Add(rubyFloat);
return(rubyFloat);
case RubyType.String:
var stringEntry = ReadStringValue(context);
context.Data.Add(stringEntry);
return(stringEntry);
case RubyType.True:
return(new RubyValue(true));
case RubyType.False:
return(new RubyValue(false));
default:
throw new Exception($"Unknown type: {type}");
}
}
