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//
// Mono.ILASM.FieldTable.cs
//
// Author(s):
// Jackson Harper (Jackson@LatitudeGeo.com)
//
// (C) 2003 Jackson Harper, All rights reserved
//
using PEAPI;
using System;
using System.Text;
using System.Collections;
namespace Mono.ILASM {
public class FieldTable {
private class FieldTableItem {
private static readonly int DefinedFlag = 2;
private int flags;
public ArrayList LocationList;
public FieldDef Field;
public FieldTableItem (FieldDef field, Location location)
{
flags = 0;
Field = field;
LocationList = new ArrayList ();
LocationList.Add (location);
}
public bool Defined {
get { return ((flags & DefinedFlag) != 0); }
set {
if (value)
flags |= DefinedFlag;
else
flags ^= DefinedFlag;
}
}
}
protected Hashtable table;
protected ClassDef parent_class;
public FieldTable (ClassDef parent_class)
{
this.parent_class = parent_class;
table = new Hashtable ();
}
public Field GetReference (TypeRef type, string name, Location location)
{
FieldTableItem item = table[name] as FieldTableItem;
if (item != null) {
item.LocationList.Add (location);
return item.Field;
}
FieldDef field = parent_class.AddField (name, type.Type);
AddReferenced (name, field, location);
return field;
}
public FieldDef AddDefinition (FieldAttr field_attr, string name,
TypeRef type, Location location)
{
FieldTableItem item = (FieldTableItem) table[name];
if (item == null) {
FieldDef field = parent_class.AddField (field_attr, name, type.Type);
AddDefined (name, field, location);
return field;
}
item.Field.AddFieldAttr (field_attr);
item.Defined = true;
return item.Field;
}
public bool CheckDefined ()
{
foreach (DictionaryEntry dic_entry in table) {
FieldTableItem table_item = (FieldTableItem) dic_entry.Value;
if (table_item.Defined)
continue;
Report.Error (String.Format ("Field: {0} is not defined.", dic_entry.Key));
}
return true;
}
protected void AddDefined (string signature, FieldDef field, Location location)
{
if (table.Contains (signature))
return;
FieldTableItem item = new FieldTableItem (field, location);
item.Defined = true;
table[signature] = item;
}
protected void AddReferenced (string signature, FieldDef field, Location location)
{
FieldTableItem item = new FieldTableItem (field, location);
table[signature] = item;
}
/// <summary>
/// If a field is allready defined throw an Error
/// </summary>
protected void CheckExists (string signature)
{
FieldTableItem item = table[signature] as FieldTableItem;
if ((item != null) && (item.Defined))
Report.Error ("Field: " + signature + " defined in multiple locations.");
}
}
}
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