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using System;

using System.Diagnostics;

using System.Reflection;

using System.Runtime.InteropServices;

using System.Threading;

namespace Python.Runtime

{

/// <summary>

/// Debugging helper utilities.

/// The methods are only executed when the DEBUG flag is set. Otherwise

/// they are automagically hidden by the compiler and silently suppressed.

/// </summary>

internal class DebugUtil

{

[Conditional("DEBUG")]

public static void Print(string msg, params IntPtr[] args)

{

string result = msg;

result += " ";

foreach (IntPtr t in args)

{

if (t == IntPtr.Zero)

{

Console.WriteLine("null arg to print");

}

IntPtr ob = Runtime.PyObject_Repr(t);

result += Runtime.GetManagedString(ob);

Runtime.XDecref(ob);

result += " ";

}

Console.WriteLine(result);

}

[Conditional("DEBUG")]

public static void Print(string msg)

{

Console.WriteLine(msg);

}

[Conditional("DEBUG")]

internal static void DumpType(IntPtr type)

{

IntPtr op = Marshal.ReadIntPtr(type, TypeOffset.tp_name);

string name = Marshal.PtrToStringAnsi(op);

Console.WriteLine("Dump type: {0}", name);

op = Marshal.ReadIntPtr(type, TypeOffset.ob_type);

Print(" type: ", op);

op = Marshal.ReadIntPtr(type, TypeOffset.tp_base);

Print(" base: ", op);

op = Marshal.ReadIntPtr(type, TypeOffset.tp_bases);

Print(" bases: ", op);

//op = Marshal.ReadIntPtr(type, TypeOffset.tp_mro);

//DebugUtil.Print(" mro: ", op);

FieldInfo[] slots = typeof(TypeOffset).GetFields();

int size = IntPtr.Size;

for (var i = 0; i < slots.Length; i++)

{

int offset = i * size;

name = slots[i].Name;

op = Marshal.ReadIntPtr(type, offset);

Console.WriteLine(" {0}: {1}", name, op);

}

Console.WriteLine("");

Console.WriteLine("");

op = Marshal.ReadIntPtr(type, TypeOffset.tp_dict);

if (op == IntPtr.Zero)

{

Console.WriteLine(" dict: null");

}

else

{

Print(" dict: ", op);

}

}

[Conditional("DEBUG")]

internal static void DumpInst(IntPtr ob)

{

IntPtr tp = Runtime.PyObject_TYPE(ob);

var sz = (int)Marshal.ReadIntPtr(tp, TypeOffset.tp_basicsize);

for (var i = 0; i < sz; i += IntPtr.Size)

{

var pp = new IntPtr(ob.ToInt64() + i);

IntPtr v = Marshal.ReadIntPtr(pp);

Console.WriteLine("offset {0}: {1}", i, v);

}

Console.WriteLine("");

Console.WriteLine("");

}

[Conditional("DEBUG")]

internal static void debug(string msg)

{

var st = new StackTrace(1, true);

StackFrame sf = st.GetFrame(0);

MethodBase mb = sf.GetMethod();

Type mt = mb.DeclaringType;

string caller = mt.Name + "." + sf.GetMethod().Name;

Thread t = Thread.CurrentThread;

string tid = t.GetHashCode().ToString();

Console.WriteLine("thread {0} : {1}", tid, caller);

Console.WriteLine(" {0}", msg);

}

/// <summary>

/// Helper function to inspect/compare managed to native conversions.

/// Especially useful when debugging CustomMarshaler.

/// </summary>

/// <param name="bytes"></param>

[Conditional("DEBUG")]

public static void PrintHexBytes(byte[] bytes)

{

if ((bytes == null) || (bytes.Length == 0))

{

Console.WriteLine("<none>");

}

else

{

foreach (byte t in bytes)

{

Console.Write("{0:X2} ", t);

}

Console.WriteLine();

}

}

}

}