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Initial implementation of new XML spec parser.
This commit is contained in:
Stefanos A.
parent
be6c583f4f
commit
88438102a2
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@ -1,45 +1,220 @@
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Xml.Linq;
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namespace CHeaderToXML
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{
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class GLXmlParser : Parser
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{
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string EnumPrefix { get { return Prefix.ToUpper() + "_"; } }
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string FuncPrefix { get { return Prefix; } }
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public GLXmlParser()
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{
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}
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public override IEnumerable<XElement> Parse(string[] lines)
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{
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var input = XDocument.Parse(String.Join(" ", lines));
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// Enumerations
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var groups = input.Root
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.Elements("groups")
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.Elements("group");
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foreach (var group in groups)
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List<XElement> elements = new List<XElement>();
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elements.AddRange(ParseEnums(input));
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elements.AddRange(ParseFunctions(input));
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return elements;
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}
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IEnumerable<XElement> ParseEnums(XDocument input)
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{
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var e = new XElement("enum");
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e.Name = group.Attribute("name").Value;
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foreach (var group in input.Root.Elements("groups").Elements("group"))
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{
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var e = new XElement("enum", new XAttribute("name", TrimName(group.Attribute("name").Value)));
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foreach (var token in group.Elements("enum"))
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{
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if (token.Attribute("value") != null)
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{
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e.Add(new XElement("token",
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new XAttribute("name", token.Attribute("name")),
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new XAttribute("value", token.Attribute("value"))));
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new XAttribute("name", TrimName(token.Attribute("name").Value)),
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new XAttribute("value", token.Attribute("value").Value)));
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}
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else
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{
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e.Add(new XElement("use",
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new XAttribute("token", token.Attribute("name"))));
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new XAttribute("token", TrimName(token.Attribute("name").Value))));
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}
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}
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yield return e;
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}
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var all = new XElement("enum", new XAttribute("name", "All"));
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foreach (var token in input.Root.Elements("enums").Elements("enum"))
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{
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all.Add(token);
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}
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yield return all;
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var features = input.Root.Elements("feature");
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var extensions = input.Root.Elements("extension");
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foreach (var feature in features.Concat(extensions))
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{
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var e = new XElement("enum",
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new XAttribute("name", feature.Attribute("name").Value),
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new XAttribute("version", feature.Attribute("number").Value));
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foreach (var token in feature.Elements("require").Elements("enum"))
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{
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e.Add(new XElement("use", new XAttribute("token", token.Attribute("name").Value)));
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}
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yield return e;
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}
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}
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IEnumerable<XElement> ParseFunctions(XDocument input)
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{
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// Go through the list of commands and build OpenTK functions out of those.
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// Every function has a number of attributes that define which API version and
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// category (see above) they belong to.
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// It also includes information about the return type and parameters. These
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// are then parsed by the binding generator in order to create the necessary
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// overloads for correct use.
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// First, we go through all available features and extensions and build a list
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// of commands that belong to them.
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// We will then use this information to "decorate" our bindings with
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// information about versioning, extension support and deprecation.
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var features = input.Root.Elements("feature");
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var extensions = input.Root.Elements("extensions").Elements("extension");
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var categories = new SortedDictionary<string, XElement>();
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foreach (var c in features.Concat(extensions))
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{
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var category = TrimName(c.Attribute("name").Value);
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var api = c.Attribute("api") != null ? c.Attribute("api").Value : null;
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var version = c.Attribute("number") != null ? c.Attribute("number").Value : null;
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foreach (var command in c.Elements("require").Elements("command"))
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{
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var cmd_name = TrimName(command.Attribute("name").Value);
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if (!categories.ContainsKey(cmd_name))
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categories.Add(cmd_name, new XElement(cmd_name));
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var cmd_element = categories[cmd_name];
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var cmd_category = cmd_element.Attribute("category") ?? new XAttribute("category", "");
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var cmd_api = cmd_element.Attribute("api") ?? new XAttribute("api", "");
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var cmd_version = cmd_element.Attribute("version") ?? new XAttribute("version", "");
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cmd_category.Value = Join(cmd_category.Value, category);
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cmd_api.Value = Join(cmd_api.Value, api);
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cmd_version.Value = Join(cmd_version.Value, version);
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cmd_element.SetAttributeValue(cmd_category.Name, cmd_category.Value);
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cmd_element.SetAttributeValue(cmd_api.Name, cmd_api.Value);
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cmd_element.SetAttributeValue(cmd_version.Name, cmd_version.Value);
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}
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}
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// Now, we go through all commands and retrieve their parameters and return types.
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// We also use the list we built above to decorate them with the relevant attributes.
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foreach (var command in input.Root.Elements("commands").Elements("command"))
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{
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var function = new XElement("function");
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var cmd_name = FunctionName(command);
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var name = new XAttribute("name", cmd_name);
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var extension = new XAttribute("extension", "");
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var returns = new XElement("returns", FunctionParameterType(command.Element("proto")));
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var category = categories.ContainsKey(cmd_name) ? new XAttribute("category", categories[cmd_name].Attribute("category").Value) : null;
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var version = categories.ContainsKey(cmd_name) ? new XAttribute("version", categories[cmd_name].Attribute("version").Value) : null;
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var api = categories.ContainsKey(cmd_name) ? new XAttribute("api", categories[cmd_name].Attribute("api").Value) : null;
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var deprecated = new XAttribute("deprecated", "");
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foreach (var parameter in command.Elements("param"))
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{
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var p = new XElement("param");
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var pname = new XAttribute("name", parameter.Element("name").Value);
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var type = new XAttribute("type", FunctionParameterType(parameter));
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var count = parameter.Attribute("len") != null ?
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new XAttribute("count", parameter.Attribute("len").Value) : null;
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var flow = new XAttribute("flow",
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type.Value.Contains("*") && !type.Value.Contains("const") ? "out" : "in");
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p.Add(pname, type, flow);
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if (count != null)
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{
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p.Add(count);
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}
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function.Add(p);
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}
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function.Add(name);
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function.Add(extension);
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function.Add(returns);
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function.Add(category);
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function.Add(version);
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function.Add(api);
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function.Add(deprecated);
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yield return function;
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}
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}
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string FunctionName(XElement e)
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{
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return TrimName(e.Element("proto").Element("name").Value);
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}
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string FunctionParameterType(XElement e)
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{
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// Parse the C-like <proto> element. Possible instances:
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// Return types:
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// - <proto>void <name>glGetSharpenTexFuncSGIS</name></proto>
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// -> <returns>void</returns>
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// - <proto group="String">const <ptype>GLubyte</ptype> *<name>glGetString</name></proto>
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// -> <returns>String</returns>
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// Note: group attribute takes precedence if it exists. This matches the old .spec file format.
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// Parameter types:
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// - <param><ptype>GLenum</ptype> <name>shadertype</name></param>
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// -> <param name="shadertype" type="GLenum" />
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// - <param len="1"><ptype>GLsizei</ptype> *<name>length</name></param>
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// -> <param name="length" type="GLsizei" count="1" />
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var proto = e.Value;
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var name = e.Element("name").Value;
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var group = e.Attribute("group");
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var ret = group != null ? group.Value : proto.Remove(proto.LastIndexOf(name)).Trim();
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return ret;
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}
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string TrimName(string name)
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{
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if (name.StartsWith(EnumPrefix))
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return name.Remove(0, EnumPrefix.Length);
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else if (name.StartsWith(FuncPrefix))
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return name.Remove(0, FuncPrefix.Length);
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else
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return name;
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}
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static string Join(string left, string right)
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{
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if (!String.IsNullOrEmpty(left) && !String.IsNullOrEmpty(right))
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return left + "|" + right;
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else if (!String.IsNullOrEmpty(left))
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return left;
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else if (!String.IsNullOrEmpty(right))
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return right;
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else
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return String.Empty;
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}
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}
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}
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