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// 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.Generic;
using System.IO;
public class ManagedCallString {
IDictionary<Parameter, bool> parms = new Dictionary<Parameter, bool> ();
IList<Parameter> dispose_params = new List<Parameter> ();
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.IsCount || p.IsUserData) && parms.IsHidden (p)) {
user_data_param = p.Name;
continue;
} else if (p is ErrorParameter) {
error_param = p.Name;
continue;
}
bool special = false;
if (p.PassAs != String.Empty && (p.Name != p.FromNative (p.Name)))
special = true;
else if (p.Generatable is CallbackGen)
special = true;
this.parms.Add (p, special);
if (p.IsOwnable) {
dispose_params.Add (p);
}
}
}
public bool HasOutParam {
get {
foreach (Parameter p in parms.Keys) {
if (p.PassAs == "out")
return true;
}
return false;
}
}
public bool HasDisposeParam {
get { return dispose_params.Count > 0; }
}
public string Unconditional (string indent) {
string ret = "";
if (error_param != null)
ret = indent + error_param + " = IntPtr.Zero;\n";
foreach (Parameter p in dispose_params) {
ret += indent + p.CSType + " my" + p.Name + " = null;\n";
}
return ret;
}
public string Setup (string indent)
{
string ret = "";
foreach (Parameter p in parms.Keys) {
if (parms [p] == false) {
continue;
}
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 {
ret += indent + igen.QualifiedName + " my" + p.Name;
if (p.PassAs == "ref")
ret += " = " + p.FromNative (p.Name);
ret += ";\n";
}
}
foreach (Parameter p in dispose_params) {
ret += indent + "my" + p.Name + " = " + p.FromNative (p.Name) + ";\n";
}
return ret;
}
public override string ToString ()
{
if (parms.Count < 1)
return "";
string[] result = new string [parms.Count];
int i = 0;
foreach (Parameter p in parms.Keys) {
result [i] = p.PassAs == "" ? "" : p.PassAs + " ";
if (p.Generatable is CallbackGen) {
result [i] += p.Name + "_invoker.Handler";
} else {
if (parms [p] || dispose_params.Contains(p)) {
// Parameter was declared and marshalled earlier
result [i] += "my" + p.Name;
} else {
result [i] += p.FromNative (p.Name);
}
}
i++;
}
return String.Join (", ", result);
}
public string Finish (string indent)
{
string ret = "";
foreach (Parameter p in parms.Keys) {
if (parms [p] == false) {
continue;
}
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
ret += indent + p.Name + " = " + igen.CallByName ("my" + p.Name) + ";\n";
}
return ret;
}
public string DisposeParams (string indent)
{
string ret = "";
foreach (Parameter p in dispose_params) {
string name = "my" + p.Name;
string disp_name = "disposable_" + p.Name;
ret += indent + "var " + disp_name + " = " + name + " as IDisposable;\n";
ret += indent + "if (" + disp_name + " != null)\n";
ret += indent + "\t" + disp_name + ".Dispose ();\n";
}
return ret;
}
}
}
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