gstreamer/generator/ManagedCallString.cs
Sebastian Dröge c751dcaf07 Add hack to the codegenerator to handle "owned-in-call-scope" functionality to virtual methods
This is needed for things like BaseTransform.OnTransformIp's buffer parameter.
During the call we own the reference but not afterwards.
2009-09-23 08:20:59 +02:00

171 lines
4.9 KiB
C#

// GtkSharp.Generation.ManagedCallString.cs - The ManagedCallString Class.
//
// Author: Mike Kestner <mkestner@speakeasy.net>
//
// Copyright (c) 2003 Mike Kestner
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the GNU General Public
// License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
namespace GtkSharp.Generation {
using System;
using System.Collections;
using System.IO;
public class ManagedCallString {
ArrayList parms = new ArrayList ();
ArrayList special = new ArrayList ();
string error_param = null;
string user_data_param = null;
string destroy_param = null;
public ManagedCallString (Parameters parms)
{
for (int i = 0; i < parms.Count; i ++) {
Parameter p = parms [i];
if (p.IsLength && i > 0 && parms [i-1].IsString)
continue;
else if (p.Scope == "notified") {
user_data_param = parms[i+1].Name;
destroy_param = parms[i+2].Name;
i += 2;
} else if (p.IsUserData && parms.IsHidden (p)) {
user_data_param = p.Name;
continue;
} else if (p is ErrorParameter) {
error_param = p.Name;
continue;
}
this.parms.Add (p);
if (p.PassAs != String.Empty && (p.Name != p.FromNative (p.Name)))
this.special.Add (true);
else if (p.Generatable is CallbackGen)
this.special.Add (true);
else if (p.Scope == "call")
this.special.Add (true);
else
this.special.Add (false);
}
}
public bool HasOutParam {
get {
foreach (Parameter p in parms) {
if (p.PassAs == "out")
return true;
}
return false;
}
}
public string Unconditional (string indent) {
string ret = "";
if (error_param != null)
ret = indent + error_param + " = IntPtr.Zero;\n";
return ret;
}
public string Setup (string indent)
{
string ret = "";
for (int i = 0; i < parms.Count; i ++) {
if ((bool)special[i] == false)
continue;
Parameter p = parms [i] as Parameter;
IGeneratable igen = p.Generatable;
if (igen is CallbackGen) {
if (user_data_param == null)
ret += indent + String.Format ("{0} {1}_invoker = new {0} ({1});\n", (igen as CallbackGen).InvokerName, p.Name);
else if (destroy_param == null)
ret += indent + String.Format ("{0} {1}_invoker = new {0} ({1}, {2});\n", (igen as CallbackGen).InvokerName, p.Name, user_data_param);
else
ret += indent + String.Format ("{0} {1}_invoker = new {0} ({1}, {2}, {3});\n", (igen as CallbackGen).InvokerName, p.Name, user_data_param, destroy_param);
} else if (p.Scope == "call") {
if (igen is ObjectBase)
ret += indent + igen.QualifiedName + " my" + p.Name + " = " + (igen as ObjectBase).FromNative (p.Name, true) + ";\n";
else
throw new NotImplementedException();
} else {
ret += indent + igen.QualifiedName + " my" + p.Name;
if (p.PassAs == "ref")
ret += " = " + p.FromNative (p.Name);
ret += ";\n";
}
}
return ret;
}
public override string ToString ()
{
if (parms.Count < 1)
return "";
string[] result = new string [parms.Count];
for (int i = 0; i < parms.Count; i ++) {
Parameter p = parms [i] as Parameter;
result [i] = p.PassAs == "" ? "" : p.PassAs + " ";
if (p.Generatable is CallbackGen)
result [i] += p.Name + "_invoker.Handler";
else
result [i] += ((bool)special[i]) ? "my" + p.Name : p.FromNative (p.Name);
}
return String.Join (", ", result);
}
public string Finish (string indent)
{
string ret = "";
for (int i = 0; i < parms.Count; i ++) {
if ((bool)special[i] == false)
continue;
Parameter p = parms [i] as Parameter;
IGeneratable igen = p.Generatable;
if (igen is CallbackGen) {
continue;
} else if (igen is StructBase || igen is ByRefGen) {
ret += indent + String.Format ("if ({0} != IntPtr.Zero) System.Runtime.InteropServices.Marshal.StructureToPtr (my{0}, {0}, false);\n", p.Name);
} else if (igen is IManualMarshaler) {
ret += String.Format ("{0}{1} = {2};", indent, p.Name, (igen as IManualMarshaler).AllocNative ("my" + p.Name));
} else if (p.Scope == "call") {
if (igen is ObjectBase || igen is OpaqueGen) {
if (igen is ObjectBase)
ret += indent + "IntPtr dummy = my" + p.Name + ".OwnedHandle;\n";
else
throw new NotImplementedException();
ret += indent + "my" + p.Name + ".Dispose();\n";
}
} else {
ret += indent + p.Name + " = " + igen.CallByName ("my" + p.Name) + ";\n";
}
}
return ret;
}
}
}