public static void generateNativeMethodStubs(
     AnnotationProcessorEnvironment env,
     TypeMap type_map,
     PrintWriter writer,
     InterfaceDeclaration d,
     boolean generate_error_checks,
     boolean context_specific) {
   for (MethodDeclaration method : d.getMethods()) {
     Alternate alt_annotation = method.getAnnotation(Alternate.class);
     if (alt_annotation != null && !alt_annotation.nativeAlt()) continue;
     generateMethodStub(
         env,
         type_map,
         writer,
         Utils.getQualifiedClassName(d),
         method,
         Mode.NORMAL,
         generate_error_checks,
         context_specific);
     if (Utils.hasMethodBufferObjectParameter(method))
       generateMethodStub(
           env,
           type_map,
           writer,
           Utils.getQualifiedClassName(d),
           method,
           Mode.BUFFEROBJECT,
           generate_error_checks,
           context_specific);
   }
 }
  private static boolean generateBufferParameterAddress(
      TypeMap type_map,
      PrintWriter writer,
      MethodDeclaration method,
      ParameterDeclaration param,
      Mode mode,
      boolean loopDeclared) {
    NativeTypeTranslator translator = new NativeTypeTranslator(type_map, param);
    param.getType().accept(translator);
    writer.print("\t" + translator.getSignature() + param.getSimpleName());
    writer.print(BUFFER_ADDRESS_POSTFIX + " = ((");
    writer.print(translator.getSignature());
    Check check_annotation = param.getAnnotation(Check.class);
    writer.print(")");
    if (mode == Mode.BUFFEROBJECT && param.getAnnotation(BufferObject.class) != null) {
      writer.print(
          "offsetToPointer("
              + param.getSimpleName()
              + Utils.BUFFER_OBJECT_PARAMETER_POSTFIX
              + "))");
    } else {
      Class java_type = Utils.getJavaType(param.getType());
      if (Buffer.class.isAssignableFrom(java_type)
          || java_type.equals(CharSequence.class)
          || java_type.equals(CharSequence[].class)) {
        boolean explicitly_byte_sized =
            java_type.equals(Buffer.class)
                || translator.getAnnotationType().equals(type_map.getVoidType());
        if (explicitly_byte_sized) writer.print("(((char *)");
        if (method.getAnnotation(GenerateAutos.class) != null
            || (check_annotation != null && check_annotation.canBeNull())) {
          writer.print("safeGetBufferAddress(env, " + param.getSimpleName());
        } else {
          writer.print("(*env)->GetDirectBufferAddress(env, " + param.getSimpleName());
        }
        writer.print("))");
        writer.print(" + " + param.getSimpleName() + BUFFER_POSITION_POSTFIX);
        if (explicitly_byte_sized) writer.print("))");
      } else if (java_type.equals(String.class)) {
        writer.print("GetStringNativeChars(env, " + param.getSimpleName() + "))");
      } else throw new RuntimeException("Illegal type " + java_type);
    }
    writer.println(";");

    if (param.getAnnotation(StringList.class) != null) {
      if (Utils.getJavaType(param.getType()) != CharSequence[].class
          && (param.getAnnotation(GLchar.class) == null
              || param.getAnnotation(NullTerminated.class) == null
              || param.getAnnotation(NullTerminated.class).value().length() == 0))
        throw new RuntimeException(
            "StringList annotation can only be applied on null-terminated GLchar buffers.");

      if ("_str".equals(param.getSimpleName()))
        throw new RuntimeException(
            "The name '_str' is not valid for arguments annotated with StringList");

      // Declare loop counters and allocate string array
      if (!loopDeclared) {
        writer.println("\tunsigned int _str_i;");
        writer.println("\tGLchar *_str_address;");
        loopDeclared = true;
      }
      writer.println(
          "\tGLchar **"
              + param.getSimpleName()
              + STRING_LIST_POSTFIX
              + " = (GLchar **) malloc("
              + param.getAnnotation(StringList.class).value()
              + "*sizeof(GLchar*));");
    }
    return loopDeclared;
  }
  private static void generateMethodStub(
      AnnotationProcessorEnvironment env,
      TypeMap type_map,
      PrintWriter writer,
      String interface_name,
      MethodDeclaration method,
      Mode mode,
      boolean generate_error_checks,
      boolean context_specific) {
    if (!context_specific && method.getAnnotation(Alternate.class) == null) writer.print("static ");
    else writer.print("JNIEXPORT ");

    TypeMirror result_type = Utils.getMethodReturnType(method);

    if (method.getAnnotation(GLpointer.class) != null) {
      writer.print("jlong");
    } else {
      JNITypeTranslator translator = new JNITypeTranslator();
      result_type.accept(translator);
      writer.print(translator.getSignature());
    }
    writer.print(" JNICALL ");

    writer.print(
        Utils.getQualifiedNativeMethodName(
            interface_name, method, generate_error_checks, context_specific));
    if (mode == Mode.BUFFEROBJECT) writer.print(Utils.BUFFER_OBJECT_METHOD_POSTFIX);
    writer.print("(JNIEnv *env, jclass clazz");
    generateParameters(writer, method.getParameters(), mode);
    if (Utils.getNIOBufferType(result_type) != null) {
      CachedResult cached_result_annotation = method.getAnnotation(CachedResult.class);
      if (cached_result_annotation == null || !cached_result_annotation.isRange())
        writer.print(", jlong " + Utils.RESULT_SIZE_NAME);
      if (cached_result_annotation != null) writer.print(", jobject " + Utils.CACHED_BUFFER_NAME);
    }
    if (context_specific) {
      writer.print(", jlong " + Utils.FUNCTION_POINTER_VAR_NAME);
    }
    writer.println(") {");
    generateBufferParameterAddresses(type_map, writer, method, mode);
    Alternate alt_annotation = method.getAnnotation(Alternate.class);
    if (context_specific) {
      String typedef_name = Utils.getTypedefName(method);
      writer.print(
          "\t"
              + typedef_name
              + " "
              + (alt_annotation == null ? method.getSimpleName() : alt_annotation.value()));
      writer.print(" = (" + typedef_name + ")((intptr_t)");
      writer.println(Utils.FUNCTION_POINTER_VAR_NAME + ");");
    }
    generateStringListInits(writer, method.getParameters());
    writer.print("\t");
    if (!result_type.equals(env.getTypeUtils().getVoidType())) {
      Declaration return_declaration;
      ParameterDeclaration result_param = Utils.getResultParameter(method);
      if (result_param != null) return_declaration = result_param;
      else return_declaration = method;
      NativeTypeTranslator native_translator =
          new NativeTypeTranslator(type_map, return_declaration);
      result_type.accept(native_translator);
      writer.print(native_translator.getSignature() + " " + Utils.RESULT_VAR_NAME);
      if (result_param != null) {
        writer.println(";");
        writer.print("\t");
      } else writer.print(" = ");
    }
    writer.print((alt_annotation == null ? method.getSimpleName() : alt_annotation.value()) + "(");
    generateCallParameters(writer, type_map, method.getParameters());
    writer.print(")");
    writer.println(";");
    generateStringDeallocations(writer, method.getParameters());
    if (!result_type.equals(env.getTypeUtils().getVoidType())) {
      writer.print("\treturn ");
      Class java_result_type = Utils.getJavaType(result_type);
      if (Buffer.class.isAssignableFrom(java_result_type)) {
        if (method.getAnnotation(CachedResult.class) != null)
          writer.print("safeNewBufferCached(env, ");
        else writer.print("safeNewBuffer(env, ");
      } else if (String.class.equals(java_result_type)) {
        writer.print("NewStringNativeUnsigned(env, ");
      } else if (method.getAnnotation(GLpointer.class) != null) {
        writer.print("(intptr_t)");
      }
      writer.print(Utils.RESULT_VAR_NAME);
      if (Buffer.class.isAssignableFrom(java_result_type)) {
        writer.print(", ");
        if (method.getAnnotation(CachedResult.class) != null
            && method.getAnnotation(CachedResult.class).isRange())
          Utils.printExtraCallArguments(
              writer, method, method.getAnnotation(AutoResultSize.class).value());
        else Utils.printExtraCallArguments(writer, method, Utils.RESULT_SIZE_NAME);
      }
      if (Buffer.class.isAssignableFrom(java_result_type) || String.class.equals(java_result_type))
        writer.print(")");
      writer.println(";");
    }
    writer.println("}");
    writer.println();
  }