private bool GetTypeFields(string ns, string name, out int start, out int end)
{
start = end = -1;
bool ret = false;
FieldIterator fieldIt = m_ClrFile.Metadata.Tables[(int)CorTokenType.mdtFieldDef] as FieldIterator;
TypeDefIterator it = m_ClrFile.Metadata.Tables[(int)CorTokenType.mdtTypeDef] as TypeDefIterator;
it.MoveToFirst();
for (; !it.IsEnd; it.MoveToNext())
{
string nsName = GetString(m_ClrFile.Buffer, m_StringStart, it.NameSpace);
string typeName = GetString(m_ClrFile.Buffer, m_StringStart, it.Name);
if (0 == typeName.CompareTo(name) && (string.IsNullOrEmpty(ns) || 0 == nsName.CompareTo(ns)))
{
start = (int)it.FieldList;
if (it.MoveToNext())
{
end = (int)it.FieldList;
}
else
{
end = (int)fieldIt.RecordNumber;
}
ret = true;
break;
}
}
return(ret);
}
public void ModifyWithField(string fullName, string methodName, uint pos, byte op, string fullCn, string fn)
{
string classNs = string.Empty;
string className = fullName;
int srcIx = fullName.LastIndexOf('.');
if (srcIx > 0)
{
classNs = fullName.Substring(0, srcIx);
className = fullName.Substring(srcIx + 1);
}
string ns = string.Empty;
string cn = fullCn;
int targetIx = fullCn.LastIndexOf('.');
if (targetIx > 0)
{
ns = fullCn.Substring(0, targetIx);
cn = fullCn.Substring(targetIx + 1);
}
Modify(classNs, className, methodName, (uint offset) => {
int srcStart, srcEnd;
bool srcValid = GetTypeFields(ns, cn, out srcStart, out srcEnd);
if (!srcValid)
{
s_ErrorTxts.Add(string.Format("Can't find src {0}->{1}", cn, srcValid));
return;
}
FieldIterator it = m_ClrFile.Metadata.Tables[(int)CorTokenType.mdtFieldDef] as FieldIterator;
for (uint ix = (uint)srcStart; ix < (uint)srcEnd; ++ix)
{
it.MoveTo(ix - 1);
string name = GetString(m_ClrFile.Buffer, m_StringStart, it.Name);
if (name == fn)
{
m_ClrFile.Buffer[offset + pos] = op;
m_ClrFile.Buffer[offset + pos + 1] = (byte)(ix & 0xff);
m_ClrFile.Buffer[offset + pos + 2] = (byte)((ix >> 8) & 0xff);
m_ClrFile.Buffer[offset + pos + 3] = (byte)((ix >> 16) & 0xff);
m_ClrFile.Buffer[offset + pos + 4] = (byte)0x04;
break;
}
}
});
}