public HLArguments DecodeArgs(ArgEncoding encoding)
{
switch (encoding)
{
case ArgEncoding.None:
throw new ArgumentException();
case ArgEncoding.I8:
return new HLArguments((int)m_reader.ReadSByte());
case ArgEncoding.I16:
return new HLArguments((int)m_reader.ReadInt16());
case ArgEncoding.I32:
return new HLArguments(m_reader.ReadInt32());
case ArgEncoding.I64:
return new HLArguments(m_reader.ReadInt64());
case ArgEncoding.U8:
return new HLArguments((uint)m_reader.ReadByte());
case ArgEncoding.U16:
return new HLArguments((uint)m_reader.ReadUInt16());
case ArgEncoding.U32:
return new HLArguments(m_reader.ReadUInt32());
case ArgEncoding.U64:
return new HLArguments(m_reader.ReadUInt64());
case ArgEncoding.F32:
return new HLArguments(m_reader.ReadSingle());
case ArgEncoding.F64:
return new HLArguments(m_reader.ReadDouble());
case ArgEncoding.No:
return HLArguments.CreateNo(m_reader.ReadByte());
case ArgEncoding.MethodDefOrRefOrSpec:
case ArgEncoding.MethodDefOrRef:
case ArgEncoding.TypeDefOrRefOrSpec:
case ArgEncoding.LoadToken:
case ArgEncoding.Field:
return new HLArguments(ReadMetaToken(encoding));
case ArgEncoding.Switch:
// III.3.66
{
uint numCases = m_reader.ReadUInt32();
int[] caseTargets = new int[numCases];
for (uint i=0; i<numCases; i++)
caseTargets[i] = m_reader.ReadInt32();
return HLArguments.CreateSwitch(caseTargets);
}
case ArgEncoding.String:
{
// III.1.9
List<char> chars = new List<char>();
uint rawToken = m_reader.ReadUInt32();
if (rawToken >> 24 != 0x70)
throw new ParseFailedException("Unexpected string token");
ArraySegment<byte> utf16string = CLRMetaDataParser.ReadBlobOrUS(m_binData.USData, rawToken & 0x00ffffff);
// II.24.2.4
// US strings are UTF-16, terminator is 1 if any code point is non-ASCII
byte terminator = utf16string.Array[utf16string.Offset + utf16string.Count - 1];
if ((utf16string.Count & 1) != 1 || (terminator != 0 && terminator != 1))
throw new ParseFailedException("Invalid inline string");
for (int offset = 0; offset < utf16string.Count - 1; offset += 2)
{
int trueOffset = offset + utf16string.Offset;
int codePoint = utf16string.Array[trueOffset] | (utf16string.Array[trueOffset + 1] << 8);
chars.Add((char)codePoint);
}
return new HLArguments(new string(chars.ToArray()));
}
default:
break;
}
throw new NotImplementedException();
}
// III.1.9
public CLRTableRow ReadMetaToken(ArgEncoding argRestriction)
{
uint rawToken = m_reader.ReadUInt32();
uint tableIndex = rawToken >> 24;
uint rowIndex = rawToken & 0x00ffffff;
if (rowIndex == 0)
return null;
CLRTableRow row = m_tables.GetTable((int)tableIndex).GetRow(rowIndex - 1);
switch (argRestriction)
{
case ArgEncoding.LoadToken:
if (!s_LoadTokenTypes.Contains(row.GetType()))
throw new ParseFailedException("Invalid ldtoken token");
return row;
case ArgEncoding.MethodDefOrRef:
if (!s_MethodDefOrRefTypes.Contains(row.GetType()))
throw new ParseFailedException("Invalid token");
if (row.GetType() == typeof(CLRMemberRefRow) && ((CLRMemberRefRow)row).MethodSig == null)
throw new ParseFailedException("Invalid token)");
return row;
case ArgEncoding.MethodDefOrRefOrSpec:
if (!s_MethodDefOrRefOrSpecTypes.Contains(row.GetType()))
throw new ParseFailedException("Invalid token");
if (row.GetType() == typeof(CLRMemberRefRow) && ((CLRMemberRefRow)row).MethodSig == null)
throw new ParseFailedException("Invalid token)");
return row;
case ArgEncoding.TypeDefOrRefOrSpec:
if (!s_TypeDefOrRefOrSpecTypes.Contains(row.GetType()))
throw new ParseFailedException("Invalid token");
return row;
case ArgEncoding.Field:
if (!s_FieldDefOrRefTypes.Contains(row.GetType()))
throw new ParseFailedException("Invalid token");
if (row.GetType() == typeof(CLRMemberRefRow) && ((CLRMemberRefRow)row).FieldSig == null)
throw new ParseFailedException("Invalid token)");
return row;
}
throw new NotImplementedException();
}
