public MetadataToken ReadCodedToken(CodedTokenType tokenType)
{
var value = ReadBySize(IsLargeToken(tokenType));
var codedToken = new CodedToken(value);
return(CodedTokenSchema.GetMetadataToken(codedToken, tokenType));
}
public static bool IsLargeToken(CodedTokenType type, TableHeap heap)
{
MetadataTokenType[] types;
if (!_schema.TryGetValue(type, out types))
{
throw new UndefinedCodedTokenSchemaException("Schema for coded token: {0} is undefined", type);
}
int bits = _sizes[type];
int max = 0;
for (int i = 0; i < types.Length; i++)
{
IMetadataTable table;
int size = heap.TryGetTable(types[i], out table) ? table.Length : 0;
max = Math.Max(size, max);
}
return(max >= (1 << (16 - bits)));
}
public static MetadataToken GetMetadataToken(CodedToken token, CodedTokenType type)
{
MetadataTokenType[] types;
if (!_schema.TryGetValue(type, out types))
{
throw new UndefinedCodedTokenSchemaException("Schema for coded token: {0} is undefined", type);
}
int bits = _sizes[type];
uint index = 0u;
uint value = token.Value;
for (int i = 0; i < bits; i++)
{
index |= value & (1u << i);
}
MetadataTokenType tokenType = types[index];
uint rid = (value >> bits);
return(new MetadataToken(tokenType, rid));
}
public static CodedToken GetCodedToken(MetadataToken token, CodedTokenType type)
{
if (token.RID == 0)
{
return(new CodedToken());
}
MetadataTokenType[] types;
if (!_schema.TryGetValue(type, out types))
{
throw new UndefinedCodedTokenSchemaException("Schema for coded token: {0} is undefined", type);
}
int index = Array.IndexOf(types, token.Type);
if (index == -1)
{
throw new UndefinedCodedTokenSchemaException("Schema for coded token: {0} and metadata token: {1} is undefined", type, token.Type);
}
uint value = token.RID << _sizes[type];
return(new CodedToken(value | (uint)index));
}
private bool IsLargeToken(CodedTokenType tokenType)
{
return(_isLargeToken(tokenType));
}
public void WriteCodedToken(MetadataToken token, CodedTokenType tokenType)
{
var codedToken = CodedTokenSchema.GetCodedToken(token, tokenType);
WriteBySize(codedToken.Value, IsLargeToken(tokenType));
}
