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// GtkSharp.Generation.FieldBase.cs - base class for struct and object
// fields
//
// Copyright (c) 2004 Novell, Inc.
//
// 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;
using System.Xml;
public abstract class FieldBase : PropertyBase {
public FieldBase (XmlElement elem, ClassBase container_type) : base (elem, container_type) {}
public virtual bool Validate (LogWriter log)
{
log.Member = Name;
if (!Ignored && !Hidden && CSType == "") {
if (Name == "Priv")
return false;
log.Warn ("field has unknown type: " + CType);
Statistics.ThrottledCount++;
return false;
}
return true;
}
internal virtual bool Readable {
get {
if (Parser.GetVersion (elem.OwnerDocument.DocumentElement) <= 2)
return elem.GetAttribute ("readable") != "false";
return elem.HasAttribute ("readable") && elem.GetAttributeAsBoolean ("readable");
}
}
internal virtual bool Writable {
get {
if (Parser.GetVersion (elem.OwnerDocument.DocumentElement) <= 2)
return elem.GetAttribute ("writeable") != "false";
return elem.HasAttribute ("writeable") && elem.GetAttributeAsBoolean ("writeable");
}
}
protected abstract string DefaultAccess { get; }
internal string Access {
get {
return elem.HasAttribute ("access") ? elem.GetAttribute ("access") : DefaultAccess;
}
}
public bool IsArray {
get {
return elem.HasAttribute ("array_len") || elem.GetAttributeAsBoolean ("array");
}
}
public bool IsBitfield {
get {
return elem.HasAttribute("bits");
}
}
public bool Ignored {
get {
if (container_type.GetProperty (Name) != null)
return true;
if (IsArray)
return true;
if (Access == "private" && (Getter == null) && (Setter == null))
return true;
return false;
}
}
string getterName, setterName;
string getOffsetName, offsetName;
void CheckGlue ()
{
getterName = setterName = getOffsetName = null;
if (Access != "public")
return;
string prefix = (container_type.NS + "Sharp_" + container_type.NS + "_" + container_type.Name).Replace(".", "__").ToLower ();
if (IsBitfield) {
if (Readable && Getter == null)
getterName = prefix + "_get_" + CName;
if (Writable && Setter == null)
setterName = prefix + "_set_" + CName;
} else {
if ((Readable && Getter == null) || (Writable && Setter == null)) {
offsetName = CName + "_offset";
getOffsetName = prefix + "_get_" + offsetName;
}
}
}
protected override void GenerateImports (GenerationInfo gen_info, string indent)
{
StreamWriter sw = gen_info.Writer;
SymbolTable table = SymbolTable.Table;
if (getterName != null) {
sw.WriteLine (indent + "[DllImport (\"{0}\")]", gen_info.GluelibName);
sw.WriteLine (indent + "extern static {0} {1} ({2} raw);",
table.GetMarshalType (CType), getterName,
container_type.MarshalType);
}
if (setterName != null) {
sw.WriteLine (indent + "[DllImport (\"{0}\")]", gen_info.GluelibName);
sw.WriteLine (indent + "extern static void {0} ({1} raw, {2} value);",
setterName, container_type.MarshalType, table.GetMarshalType (CType));
}
if (getOffsetName != null) {
sw.WriteLine (indent + "[DllImport (\"{0}\")]", gen_info.GluelibName);
sw.WriteLine (indent + "extern static uint {0} ();", getOffsetName);
sw.WriteLine ();
sw.WriteLine (indent + "static uint " + offsetName + " = " + getOffsetName + " ();");
}
base.GenerateImports (gen_info, indent);
}
public virtual void Generate (GenerationInfo gen_info, string indent)
{
if (Ignored || Hidden)
return;
CheckGlue ();
if ((getterName != null || setterName != null || getOffsetName != null) && gen_info.GlueWriter == null) {
LogWriter log = new LogWriter (container_type.QualifiedName);
log.Member = Name;
log.Warn ("needs glue for field access. Specify --glue-filename");
return;
}
GenerateImports (gen_info, indent);
SymbolTable table = SymbolTable.Table;
IGeneratable gen = table [CType];
StreamWriter sw = gen_info.Writer;
string modifiers = elem.GetAttributeAsBoolean ("new_flag") ? "new " : "";
sw.WriteLine (indent + "public " + modifiers + CSType + " " + Name + " {");
if (Getter != null) {
sw.Write (indent + "\tget ");
Getter.GenerateBody (gen_info, container_type, "\t");
sw.WriteLine ("");
} else if (getterName != null) {
sw.WriteLine (indent + "\tget {");
container_type.Prepare (sw, indent + "\t\t");
sw.WriteLine (indent + "\t\t" + CSType + " result = " + table.FromNative (ctype, getterName + " (" + container_type.CallByName () + ")") + ";");
container_type.Finish (sw, indent + "\t\t");
sw.WriteLine (indent + "\t\treturn result;");
sw.WriteLine (indent + "\t}");
} else if (Readable && offsetName != null) {
sw.WriteLine (indent + "\tget {");
sw.WriteLine (indent + "\t\tunsafe {");
if (gen is CallbackGen) {
sw.WriteLine (indent + "\t\t\tIntPtr* raw_ptr = (IntPtr*)(((byte*)" + container_type.CallByName () + ") + " + offsetName + ");");
sw.WriteLine (indent + "\t\t\t {0} del = ({0})Marshal.GetDelegateForFunctionPointer(*raw_ptr, typeof({0}));", table.GetMarshalType (CType));
sw.WriteLine (indent + "\t\t\treturn " + table.FromNative (ctype, "(del)") + ";");
}
else {
sw.WriteLine (indent + "\t\t\t" + table.GetMarshalType (CType) + "* raw_ptr = (" + table.GetMarshalType (CType) + "*)(((byte*)" + container_type.CallByName () + ") + " + offsetName + ");");
sw.WriteLine (indent + "\t\t\treturn " + table.FromNative (ctype, "(*raw_ptr)") + ";");
}
sw.WriteLine (indent + "\t\t}");
sw.WriteLine (indent + "\t}");
}
string to_native = (gen is IManualMarshaler) ? (gen as IManualMarshaler).AllocNative ("value") : gen.CallByName ("value");
if (Setter != null) {
sw.Write (indent + "\tset ");
Setter.GenerateBody (gen_info, container_type, "\t");
sw.WriteLine ("");
} else if (setterName != null) {
sw.WriteLine (indent + "\tset {");
container_type.Prepare (sw, indent + "\t\t");
sw.WriteLine (indent + "\t\t" + setterName + " (" + container_type.CallByName () + ", " + to_native + ");");
container_type.Finish (sw, indent + "\t\t");
sw.WriteLine (indent + "\t}");
} else if (Writable && offsetName != null) {
sw.WriteLine (indent + "\tset {");
sw.WriteLine (indent + "\t\tunsafe {");
if (gen is CallbackGen) {
sw.WriteLine (indent + "\t\t\t{0} wrapper = new {0} (value);", ((CallbackGen)gen).WrapperName);
sw.WriteLine (indent + "\t\t\tIntPtr* raw_ptr = (IntPtr*)(((byte*)" + container_type.CallByName () + ") + " + offsetName + ");");
sw.WriteLine (indent + "\t\t\t*raw_ptr = Marshal.GetFunctionPointerForDelegate (wrapper.NativeDelegate);");
}
else {
sw.WriteLine (indent + "\t\t\t" + table.GetMarshalType (CType) + "* raw_ptr = (" + table.GetMarshalType (CType) + "*)(((byte*)" + container_type.CallByName () + ") + " + offsetName + ");");
sw.WriteLine (indent + "\t\t\t*raw_ptr = " + to_native + ";");
}
sw.WriteLine (indent + "\t\t}");
sw.WriteLine (indent + "\t}");
}
sw.WriteLine (indent + "}");
sw.WriteLine ("");
if (getterName != null || setterName != null || getOffsetName != null)
GenerateGlue (gen_info);
}
protected void GenerateGlue (GenerationInfo gen_info)
{
StreamWriter sw = gen_info.GlueWriter;
SymbolTable table = SymbolTable.Table;
string FieldCType = CType.Replace ("-", " ");
bool byref = table[CType] is ByRefGen || table[CType] is StructGen;
string GlueCType = byref ? FieldCType + " *" : FieldCType;
string ContainerCType = container_type.CName;
string ContainerCName = container_type.Name.ToLower ();
if (getterName != null) {
sw.WriteLine ("{0} {1} ({2} *{3});",
GlueCType, getterName, ContainerCType, ContainerCName);
}
if (setterName != null) {
sw.WriteLine ("void {0} ({1} *{2}, {3} value);",
setterName, ContainerCType, ContainerCName, GlueCType);
}
if (getOffsetName != null)
sw.WriteLine ("guint {0} (void);", getOffsetName);
sw.WriteLine ("");
if (getterName != null) {
sw.WriteLine (GlueCType);
sw.WriteLine ("{0} ({1} *{2})", getterName, ContainerCType, ContainerCName);
sw.WriteLine ("{");
sw.WriteLine ("\treturn ({0}){1}{2}->{3};", GlueCType,
byref ? "&" : "", ContainerCName, CName);
sw.WriteLine ("}");
sw.WriteLine ("");
}
if (setterName != null) {
sw.WriteLine ("void");
sw.WriteLine ("{0} ({1} *{2}, {3} value)",
setterName, ContainerCType, ContainerCName, GlueCType);
sw.WriteLine ("{");
sw.WriteLine ("\t{0}->{1} = ({2}){3}value;", ContainerCName, CName,
FieldCType, byref ? "*" : "");
sw.WriteLine ("}");
sw.WriteLine ("");
}
if (getOffsetName != null) {
sw.WriteLine ("guint");
sw.WriteLine ("{0} (void)", getOffsetName);
sw.WriteLine ("{");
sw.WriteLine ("\treturn (guint)G_STRUCT_OFFSET ({0}, {1});",
ContainerCType, CName);
sw.WriteLine ("}");
sw.WriteLine ("");
}
}
}
}
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