public List <NamedConstruct> Run(CApiGeneratorOptions opts, IEnumerable <ClangTranslationUnit> tus)
{
var members = new List <NamedConstruct> ();
ClassDeclaration current = null;
CXXAccessSpecifier current_access_specifier = default(CXXAccessSpecifier);
string current_namespace = "";
List <TypeParameter> current_type_parameters = null;
foreach (var tu in tus)
{
for (int i = 0; i < tu.DiagnosticCount; i++)
{
Console.Error.WriteLine("[diag] " + tu.GetDiagnostic(i).Spelling);
}
Func <ClangCursor, ClangCursor, IntPtr, ChildVisitResult> func = null, doVisit = null;
Exception error = null;
func = (cursor, parent, clientData) => {
try {
return(doVisit(cursor, parent, clientData));
} catch (Exception ex) {
error = ex;
return(ChildVisitResult.Break);
}
};
doVisit = (cursor, parent, clientData) => {
if (cursor.Location.FileLocation?.File?.FileName == null)
{
return(ChildVisitResult.Continue); // skip non-file input
}
if (!opts.ShouldParse(cursor.Location.FileLocation?.File?.FileName))
{
return(ChildVisitResult.Continue); // skip unmatched files.
}
string id = cursor.Kind + " " + cursor.Location;
if (processed.Contains(id))
{
return(ChildVisitResult.Continue);
}
processed.Add(id);
if (cursor.Kind == CursorKind.Namespace)
{
current_namespace = cursor.Spelling;
cursor.VisitChildren(func, IntPtr.Zero);
current_namespace = "";
return(ChildVisitResult.Continue);
}
else if (cursor.Kind == CursorKind.TypeAliasDeclaration ||
cursor.Kind == CursorKind.TypeAliasTemplateDecl ||
cursor.Kind == CursorKind.ClassTemplatePartialSpecialization ||
cursor.Kind == CursorKind.NonTypeTemplateParameter)
{
// no need to care.
return(ChildVisitResult.Continue);
}
else if (cursor.Kind == CursorKind.CXXFinalAttribute)
{
// "class XXX final"
return(ChildVisitResult.Continue);
}
else if (cursor.Kind == CursorKind.ClassDeclaration ||
cursor.Kind == CursorKind.ClassTemplate
// FIXME: examine if they should apply here...
|| cursor.Kind == CursorKind.StructDeclaration ||
cursor.Kind == CursorKind.UnionDeclaration)
{
current_type_parameters = cursor.Kind == CursorKind.ClassTemplate ? new List <TypeParameter> () : null;
current = new ClassDeclaration()
{
Namespace = current_namespace,
Name = cursor.Spelling,
TypeParameters = current_type_parameters,
SourceFile = cursor.Location.FileLocation.File.FileName,
Line = cursor.Location.FileLocation.Line,
Column = cursor.Location.FileLocation.Column,
};
members.Add(current);
cursor.VisitChildren(func, IntPtr.Zero);
current = null;
return(ChildVisitResult.Continue);
}
else if (cursor.Kind == CursorKind.CXXAccessSpecifier)
{
current_access_specifier = cursor.CxxAccessSpecifier;
}
else if (cursor.Kind == CursorKind.CXXBaseSpecifier)
{
if (current != null)
{
current.BaseType = cursor.Spelling;
}
return(ChildVisitResult.Continue);
}
else if (cursor.Kind == CursorKind.TemplateTypeParameter)
{
Console.Error.WriteLine($" --- <{cursor.Spelling}> {cursor.TemplateCursorKind} | [{cursor.SpecializedCursorTemplate.Spelling}] at {cursor.Location.SpellingLocation}");
if (current_type_parameters != null)
{
current_type_parameters.Add(new TypeParameter {
Name = cursor.Spelling,
});
}
}
else if (cursor.Kind == CursorKind.FieldDeclaration || cursor.Kind == CursorKind.VarDeclaration)
{
var f = new Variable()
{
Access = current_access_specifier,
Kind = cursor.Kind,
Type = cursor.CursorType.Spelling,
ArraySize = cursor.CursorType.ArraySize,
SizeOf = cursor.CursorType.SizeOf,
IsStatic = cursor.IsCxxStatic, //FIXME: it doesn't work
IsConst = cursor.IsCxxConst, //FIXME: it doesn't work
Namespace = current_namespace,
Name = cursor.Spelling,
SourceFile = cursor.Location.FileLocation.File.FileName,
Line = cursor.Location.FileLocation.Line,
Column = cursor.Location.FileLocation.Column,
};
if (current != null)
{
current.Fields.Add(f);
return(ChildVisitResult.Continue);
}
else if (cursor.SemanticParent == null || (cursor.SemanticParent.Kind != CursorKind.ClassDeclaration && cursor.SemanticParent.Kind != CursorKind.ClassTemplate))
{
members.Add(f);
return(ChildVisitResult.Continue);
}
}
else if (cursor.Kind == CursorKind.CXXMethod || cursor.Kind == CursorKind.ConversionFunction || cursor.Kind == CursorKind.FunctionDeclaration || cursor.Kind == CursorKind.FunctionTemplate)
{
current_type_parameters = cursor.Kind == CursorKind.FunctionTemplate ? new List <TypeParameter> () : null;
int ac = 0;
var f = new Function()
{
Namespace = current_namespace,
Name = cursor.Spelling,
Kind = cursor.Kind,
TypeParameters = Enumerable.Range(0, (ac = cursor.TemplateArgumentCount) < 0 ? 0 : ac)
.Select(i => cursor.GetTemplateArgumentType(i))
.Select(a => new TypeParameter {
Name = a.Spelling
})
.ToList(),
Access = current_access_specifier,
Return = cursor.ResultType.Spelling,
IsVirtual = cursor.IsCxxVirtual,
IsPureVirtual = cursor.IsCxxPureVirtual,
SourceFile = cursor.Location.FileLocation.File.FileName,
Line = cursor.Location.FileLocation.Line,
Column = cursor.Location.FileLocation.Column,
// wait, FunctionTemplate comes with no arguments??
Parameters = Enumerable.Range(0, (ac = cursor.ArgumentCount) < 0 ? 0 : ac)
.Select(i => cursor.GetArgument(i))
.Select(a => new Variable()
{
Name = a.Spelling,
Type = a.CursorType.Spelling,
})
.ToArray()
};
if (current != null)
{
current.Functions.Add(f);
}
else if (cursor.SemanticParent == null || (cursor.SemanticParent.Kind != CursorKind.ClassDeclaration && cursor.SemanticParent.Kind != CursorKind.ClassTemplate))
{
members.Add(f);
} // otherwise it's a member definition
return(ChildVisitResult.Continue);
}
else if (cursor.Kind == CursorKind.Constructor)
{
var f = new Function()
{
Name = cursor.Spelling,
Access = current_access_specifier,
Kind = cursor.Kind,
Return = null,
SourceFile = cursor.Location.FileLocation.File.FileName,
Line = cursor.Location.FileLocation.Line,
Column = cursor.Location.FileLocation.Column,
Parameters = Enumerable.Range(0, cursor.ArgumentCount)
.Select(i => cursor.GetArgument(i))
.Select(a => new Variable()
{
Name = a.Spelling,
Type = a.CursorType.Spelling,
})
.ToArray()
};
if (current != null)
{
current.Constructors.Add(f);
}
else if (cursor.SemanticParent == null || (cursor.SemanticParent.Kind != CursorKind.ClassDeclaration && cursor.SemanticParent.Kind != CursorKind.ClassTemplate))
{
members.Add(f);
} // otherwise it's a member definition
return(ChildVisitResult.Continue);
}
else
{
switch (cursor.Kind)
{
case CursorKind.TypedefDeclaration:
case CursorKind.Destructor:
case CursorKind.StructDeclaration:
case CursorKind.FriendDecl:
case CursorKind.EnumDeclaration:
// they are safe to ignore
return(ChildVisitResult.Continue);
default:
Console.Error.WriteLine($"{cursor.Location.SpellingLocation} Unhandled token: [{cursor.Kind}] {cursor.Spelling}");
break;
}
}
return(ChildVisitResult.Continue);
};
tu.GetCursor().VisitChildren(func, IntPtr.Zero);
if (error != null)
{
throw error;
}
}
return(members);
}
void Run(string [] args)
{
var idx = ClangService.CreateIndex();
var tus = new List <ClangTranslationUnit> ();
TextWriter output = Console.Out;
var opts = new CApiGeneratorOptions();
// We are going to parse C++ sources.
opts.ClangArgs.Add("-x");
opts.ClangArgs.Add("c++");
opts.ClangArgs.Add("-std=c++1y");
foreach (var arg in args)
{
if (arg == "--help" || arg == "-?")
{
Console.Error.WriteLine($"[USAGE] {GetType ().Assembly.GetName ().CodeBase} [options] [inputs]");
Console.Error.WriteLine(@"options:
--out:[filename] output source file name.
--lib:[library] library name specified on [DllImport].
--match:[regex] process only matching files to [regex].
--arg:[namespace] compiler arguments to parse the sources." );
return;
}
else if (arg.StartsWith("--out:", StringComparison.Ordinal))
{
output = File.CreateText(arg.Substring(6));
}
else if (arg.StartsWith("--lib:", StringComparison.Ordinal))
{
opts.LibraryName = arg.Substring(6);
}
else if (arg.StartsWith("--arg:", StringComparison.Ordinal))
{
opts.ClangArgs.Add(arg.Substring(6));
}
else if (arg == "--only-explicit")
{
opts.OnlyExplicit = true;
}
else if (arg.StartsWith("--match:", StringComparison.Ordinal))
{
opts.FileMatches.Add(arg.Substring(8));
}
else if (arg.Contains(Path.DirectorySeparatorChar) || arg.Contains(Path.AltDirectorySeparatorChar))
{
foreach (var file in Directory.GetFiles(Path.GetDirectoryName(arg), Path.GetFileName(arg)))
{
opts.Sources.Add(file);
}
}
else
{
opts.Sources.Add(arg);
}
}
foreach (var source in opts.Sources)
{
if (!File.Exists(source))
{
throw new ArgumentException("File not found: " + source);
}
tus.Add(idx.ParseTranslationUnit(source, opts.ClangArgs.ToArray(), null, TranslationUnitFlags.None));
}
var members = new HeaderParser().Run(opts, tus);
new CCodeWriter().Write(output, members, opts);
output.Close();
}
public void Write(TextWriter output, IList <NamedConstruct> members, CApiGeneratorOptions opts)
{
output.WriteLine("/*****************************************************************");
output.WriteLine(" This file is automatically generated by nclang CApiGenerator.exe.");
output.WriteLine(" *****************************************************************/");
foreach (var source in opts.Sources)
{
output.WriteLine("#include \"" + source + "\"");
}
output.WriteLine("extern \"C\" {");
// forward decls.
foreach (var o in members.OfType <ClassDeclaration> ())
{
if (!opts.ShouldGenerateCodeFor(o))
{
continue; // skip unmatched file
}
output.WriteLine($"class {o.CTypeName ()} : {o.Namespace}{o.nssep}{o.Name}; // {o.SourceFileName} ({o.Line}, {o.Column})");
output.WriteLine();
}
foreach (var o in members.OfType <ClassDeclaration> ())
{
if (!opts.ShouldGenerateCodeFor(o))
{
continue; // skip unmatched file
}
output.WriteLine($"// {o.Name} Constructors and destructor.");
if (!o.Constructors.Any())
{
output.WriteLine($"{o.CTypeName ()}* {o.CName ()}_new () {{ return new {o.CTypeName ()} (); }}");
}
foreach (var c in o.Constructors)
{
var pdefs = string.Join(", ", c.Parameters.Select(p => p.Type + " " + p.Name));
var pcalls = string.Join(", ", c.Parameters.Select(p => p.Name));
output.WriteLine($"void* {o.CName ()}_new ({pdefs}) {{ return new {o.CTypeName ()} ({pcalls}); }}");
}
output.WriteLine($"void {o.CName ()}_delete ({o.CTypeName ()} *instance) {{ delete instance; }}");
output.WriteLine();
var targetFields = o.Fields.Where(f => f.Access != CXXAccessSpecifier.Private);
if (targetFields.Any())
{
output.WriteLine($"// {o.Name} Field accessors");
}
foreach (var f in targetFields)
{
if (f.IsStatic || f.IsConst)
{
// static/const
output.WriteLine($"{f.CTypeName ()} {o.CName ()}_get_{f.CName ()} () {{ return {o.Name}::{f.Name}; }}");
if (!f.IsConst)
{
output.WriteLine($"void {o.CName ()}_set_{f.CName ()} ({f.CTypeName ()} value) {{ {o.Name}::{f.Name} = value; }}");
}
}
else
{
// instance
output.WriteLine($"{f.CTypeName ()} {o.CName ()}_get_{f.CName ()} ({o.CName ()} *instance) {{ return (({o.Name}*)instance)->{f.Name}; }}");
output.WriteLine($"void {o.CName ()}_set_{f.CName ()} ({o.CName ()} *instance, {f.Type} value) {{ (({o.Name}*)instance)->{f.Name} = value; }}");
}
output.WriteLine();
}
var targetFunctions = o.Functions.Where(f => f.Access != CXXAccessSpecifier.Private);
if (targetFunctions.Any())
{
output.WriteLine($"// {o.Name} Function delegates");
}
foreach (var f in targetFunctions)
{
// static/const
string optComma = f.Parameters.Any() ? ", " : "";
output.Write($"{f.CTypeReturn ()} {o.CName ()}_{f.CName ()} ({o.CTypeName ()} *instance{optComma} {string.Join (", ", f.Parameters.Select (a => a.ToTypeAndName ()))}) ");
string retspec = f.Return == "void" ? string.Empty : "return ";
output.WriteLine($"{{ {retspec}(({o.Name}*)instance)->{f.Name} ({string.Join (", ", f.Parameters.Select (a => a.Name))}); }}");
}
output.WriteLine();
}
foreach (var o in members.OfType <Variable> ())
{
if (!opts.ShouldGenerateCodeFor(o))
{
continue; // skip unmatched file
}
output.WriteLine();
}
foreach (var o in members.OfType <Function> ().Where(m => m.Kind != CursorKind.Constructor))
{
if (!opts.ShouldGenerateCodeFor(o))
{
continue; // skip unmatched file
}
o.Write(output);
output.WriteLine();
}
output.WriteLine("} // extern \"C\"");
output.Close();
}