public static unsafe CodeBlock FromPtr(IntPtr target, int count)
{
if (target == IntPtr.Zero)
{
throw new ArgumentException();
}
if (count <= 0)
{
throw new ArgumentException();
}
var code = new CodeBlock();
var ptr = (long *)target.ToPointer();
for (int i = 0; i < count; i += 8, ++ptr)
{
var rem = count - i;
if (rem < 8)
{
var bytes = BitConverter.GetBytes(*ptr);
for (int j = 0; j < rem; ++j)
{
code.Append(bytes[j]);
}
}
else
{
code.AppendLong(*ptr);
}
}
return(code);
}
// TODO: use CAS to write data
public unsafe CodeBlock WriteTo(IntPtr target)
{
if (_code.Count == 0)
{
throw new InvalidOperationException();
}
using (new WritableMemoryBlock(target, _code.Count)) {
var oldCode = new CodeBlock();
var ptr = (long *)target.ToPointer();
for (int i = 0; i < _code.Count; i += 8, ++ptr)
{
var code = GetInt64(_code, i);
var rem = _code.Count - i;
if (rem < 8)
{
long mask = (1L << (rem * 8)) - 1L;
long tmp = *ptr;
* ptr = (code & mask) | (tmp & ~mask);
var bytes = BitConverter.GetBytes(tmp);
for (int j = 0; j < rem; ++j)
{
oldCode.Append(bytes[j]);
}
}
else
{
oldCode.AppendLong(*ptr);
*ptr = code;
}
}
return(oldCode);
}
}