public void GenerateNativeDeclarations(TranslationUnit unit)
{
// Since the native declarations are targetting the generated C bindings,
// we need to modify the AST to match the one generated by the C target.
var passes = new PassBuilder <TranslationUnitPass>(Context);
CGenerator.SetupPasses(passes);
Context.Options.GeneratorKind = GeneratorKind.C;
passes.RunPasses(pass =>
{
pass.Context = Context;
pass.VisitASTContext(Context.ASTContext);
});
Context.Options.GeneratorKind = GeneratorKind.Java;
var nativeGen = new JavaNative(Context, unit);
Generators.Add(nativeGen);
}
public void GenerateMethodInvocation(Method method)
{
var contexts = new List<MarshalContext>();
var @params = new List<string>();
if (!method.IsStatic && !(method.IsConstructor || method.IsDestructor))
@params.Add("__object");
int paramIndex = 0;
foreach (var param in method.Parameters.Where(m => !m.IsImplicit))
{
var ctx = new MarshalContext(Context)
{
ArgName = param.Name,
Parameter = param,
ParameterIndex = paramIndex++
};
contexts.Add(ctx);
var marshal = new JavaMarshalManagedToNative(ctx);
param.Visit(marshal);
if (!string.IsNullOrWhiteSpace(marshal.Context.SupportBefore))
Write(marshal.Context.SupportBefore);
@params.Add(marshal.Context.Return);
}
PrimitiveType primitive;
method.ReturnType.Type.IsPrimitiveType(out primitive);
var hasReturn = primitive != PrimitiveType.Void && !(method.IsConstructor || method.IsDestructor);
if (hasReturn)
{
TypePrinter.PushContext(TypePrinterContextKind.Native);
var typeName = method.ReturnType.Visit(TypePrinter);
TypePrinter.PopContext();
Write($"{typeName.Type} __ret = ");
}
if (method.IsConstructor)
Write("__object = ");
var unit = method.TranslationUnit;
var package = string.Join(".", GetPackageNames(unit));
Write($"{package}.{JavaNative.GetNativeLibClassName(unit)}.INSTANCE.{JavaNative.GetCMethodIdentifier(method)}(");
Write(string.Join(", ", @params));
WriteLine(");");
WriteLine("mono.embeddinator.Runtime.checkExceptions();");
foreach (var marshal in contexts)
{
if (!string.IsNullOrWhiteSpace(marshal.SupportAfter))
Write(marshal.SupportAfter);
}
if (hasReturn)
{
var ctx = new MarshalContext(Context)
{
ReturnType = method.ReturnType,
ReturnVarName = "__ret"
};
var marshal = new JavaMarshalNativeToManaged(ctx);
method.ReturnType.Visit(marshal);
if (marshal.Context.Return.ToString().Length == 0)
throw new System.Exception();
if (!string.IsNullOrWhiteSpace(marshal.Context.SupportBefore))
Write(marshal.Context.SupportBefore);
WriteLine($"return {marshal.Context.Return};");
}
}