255 lines
7.4 KiB
C#
255 lines
7.4 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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using System.Xml.Schema;
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public class Parser {
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const int curr_parser_version = 3;
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private XmlDocument Load (string filename, string schema_file)
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{
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XmlDocument doc = new XmlDocument ();
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try {
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XmlReaderSettings settings = new XmlReaderSettings ();
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if (!String.IsNullOrEmpty (schema_file)) {
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settings.Schemas.Add (null, schema_file);
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settings.ValidationType = ValidationType.Schema;
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settings.ValidationFlags |= XmlSchemaValidationFlags.ReportValidationWarnings;
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settings.ValidationEventHandler += ValidationEventHandler;
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}
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Stream stream = File.OpenRead (filename);
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XmlReader reader = XmlReader.Create (stream, settings);
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doc.Load (reader);
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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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private void ValidationEventHandler(object sender, ValidationEventArgs e)
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{
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switch (e.Severity)
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{
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case XmlSeverityType.Error:
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Console.WriteLine("Error: {0}", e.Message);
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break;
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case XmlSeverityType.Warning:
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Console.WriteLine("Warning: {0}", e.Message);
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break;
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}
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}
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public IGeneratable[] Parse (string filename)
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{
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return Parse (filename, null);
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}
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public IGeneratable[] Parse (string filename, string schema_file)
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{
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return Parse (filename, schema_file, String.Empty);
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}
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public IGeneratable[] Parse (string filename, string schema_file, string gapidir)
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{
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XmlDocument doc = Load (filename, schema_file);
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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 "include":
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string xmlpath;
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if (File.Exists (Path.Combine (gapidir, elem.GetAttribute ("xml"))))
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xmlpath = Path.Combine (gapidir, elem.GetAttribute ("xml"));
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else if (File.Exists (elem.GetAttribute ("xml")))
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xmlpath = elem.GetAttribute ("xml");
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else {
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Console.WriteLine ("Parser: Could not find include " + elem.GetAttribute ("xml"));
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break;
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}
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IGeneratable[] curr_gens = Parse (xmlpath);
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SymbolTable.Table.AddTypes (curr_gens);
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break;
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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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bool is_native_struct = elem.GetAttributeAsBoolean ("native");
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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 "union":
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result.Add (new UnionGen (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 if (is_native_struct) {
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result.Add (new NativeStructGen (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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internal static int GetVersion (XmlElement document_element)
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{
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XmlElement root = document_element;
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return root.HasAttribute ("parser_version") ? int.Parse (root.GetAttribute ("parser_version")) : 1;
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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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