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![Bertrand Lorentz](/assets/img/avatar_default.png)
The additional type information makes the code a bit more safe and readable. At least one bug is fixed by this: in ObjectGen, an invalid child property could still be generated, as it was not removed from the hash table. This should cause no real change to the generated code, except maybe in the order of some members.
195 lines
5.4 KiB
C#
195 lines
5.4 KiB
C#
// GtkSharp.Generation.Parser.cs - The XML Parsing engine.
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//
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// Author: Mike Kestner <mkestner@speakeasy.net>
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//
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// Copyright (c) 2001-2003 Mike Kestner
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// Copyright (c) 2003 Ximian Inc.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the GNU General Public
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// License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public
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// License along with this program; if not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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namespace GtkSharp.Generation {
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Xml;
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public class Parser {
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const int curr_parser_version = 2;
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private XmlDocument Load (string filename)
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{
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XmlDocument doc = new XmlDocument ();
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try {
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Stream stream = File.OpenRead (filename);
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doc.Load (stream);
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stream.Close ();
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} catch (XmlException e) {
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Console.WriteLine ("Invalid XML file.");
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Console.WriteLine (e);
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doc = null;
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}
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return doc;
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}
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public IGeneratable[] Parse (string filename)
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{
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XmlDocument doc = Load (filename);
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if (doc == null)
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return null;
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XmlElement root = doc.DocumentElement;
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if ((root == null) || !root.HasChildNodes) {
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Console.WriteLine ("No Namespaces found.");
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return null;
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}
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int parser_version;
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if (root.HasAttribute ("parser_version")) {
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try {
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parser_version = int.Parse (root.GetAttribute ("parser_version"));
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} catch {
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Console.WriteLine ("ERROR: Unable to parse parser_version attribute value \"{0}\" to a number. Input file {1} will be ignored", root.GetAttribute ("parser_version"), filename);
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return null;
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}
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} else
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parser_version = 1;
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if (parser_version > curr_parser_version)
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Console.WriteLine ("WARNING: The input file {0} was created by a parser that was released after this version of the generator. Consider updating the code generator if you experience problems.", filename);
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var gens = new List<IGeneratable> ();
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foreach (XmlNode child in root.ChildNodes) {
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XmlElement elem = child as XmlElement;
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if (elem == null)
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continue;
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switch (child.Name) {
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case "namespace":
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gens.AddRange (ParseNamespace (elem));
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break;
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case "symbol":
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gens.Add (ParseSymbol (elem));
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break;
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default:
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Console.WriteLine ("Parser::Parse - Unexpected child node: " + child.Name);
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break;
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}
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}
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return gens.ToArray ();
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}
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private IList<IGeneratable> ParseNamespace (XmlElement ns)
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{
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var result = new List<IGeneratable> ();
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foreach (XmlNode def in ns.ChildNodes) {
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XmlElement elem = def as XmlElement;
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if (elem == null)
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continue;
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if (elem.GetAttributeAsBoolean ("hidden"))
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continue;
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bool is_opaque = elem.GetAttributeAsBoolean ("opaque");
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switch (def.Name) {
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case "alias":
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string aname = elem.GetAttribute("cname");
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string atype = elem.GetAttribute("type");
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if ((aname == "") || (atype == ""))
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continue;
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result.Add (new AliasGen (aname, atype));
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break;
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case "boxed":
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if (is_opaque) {
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result.Add (new OpaqueGen (ns, elem));
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} else {
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result.Add (new BoxedGen (ns, elem));
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}
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break;
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case "callback":
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result.Add (new CallbackGen (ns, elem));
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break;
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case "enum":
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result.Add (new EnumGen (ns, elem));
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break;
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case "interface":
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result.Add (new InterfaceGen (ns, elem));
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break;
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case "object":
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result.Add (new ObjectGen (ns, elem));
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break;
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case "class":
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result.Add (new ClassGen (ns, elem));
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break;
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case "struct":
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if (is_opaque) {
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result.Add (new OpaqueGen (ns, elem));
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} else {
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result.Add (new StructGen (ns, elem));
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}
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break;
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default:
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Console.WriteLine ("Parser::ParseNamespace - Unexpected node: " + def.Name);
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break;
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}
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}
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return result;
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}
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private IGeneratable ParseSymbol (XmlElement symbol)
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{
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string type = symbol.GetAttribute ("type");
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string cname = symbol.GetAttribute ("cname");
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string name = symbol.GetAttribute ("name");
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IGeneratable result = null;
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if (type == "simple") {
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if (symbol.HasAttribute ("default_value"))
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result = new SimpleGen (cname, name, symbol.GetAttribute ("default_value"));
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else {
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Console.WriteLine ("Simple type element " + cname + " has no specified default value");
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result = new SimpleGen (cname, name, String.Empty);
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}
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} else if (type == "manual")
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result = new ManualGen (cname, name);
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else if (type == "ownable")
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result = new OwnableGen (cname, name);
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else if (type == "alias")
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result = new AliasGen (cname, name);
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else if (type == "marshal") {
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string mtype = symbol.GetAttribute ("marshal_type");
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string call = symbol.GetAttribute ("call_fmt");
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string from = symbol.GetAttribute ("from_fmt");
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result = new MarshalGen (cname, name, mtype, call, from);
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} else if (type == "struct") {
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result = new ByRefGen (symbol.GetAttribute ("cname"), symbol.GetAttribute ("name"));
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} else
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Console.WriteLine ("Parser::ParseSymbol - Unexpected symbol type " + type);
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return result;
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}
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}
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}
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