Class-ify ui_out

This patch finalizes the C++ conversion of the ui-out subsystem, by
turning the ui_out and ui_out_impl structures into a single class
hierarchy.  ui_out functions are turned into virtual methods of that new
class, so as a result there are a lot of call sites to update.

In the previous version of the patchset, there were separate ui_out and
ui_out_impl classes, but it wasn't really useful and added boilerplate.
In this version there is simply an ui_out base class that is
extended for CLI, TUI and MI.

It's a bit hard to maintain a ChangeLog for such a big patch, I did my
best but I'm sure there are some missing or outdated info in there...

gdb/ChangeLog:

    * ui-out.h (ui_out_begin, ui_out_end, ui_out_table_header,
    ui_out_table_body,  ui_out_field_int, ui_out_field_fmt_int,
    ui_out_field_core_addr, ui_out_field_string, ui_out_field_stream,
    ui_out_field_fmt, ui_out_field_skip, ui_out_spaces, ui_out_text,
    ui_out_message, ui_out_wrap_hint, ui_out_flush, ui_out_test_flags,
    ui_out_query_field, ui_out_is_mi_like_p, ui_out_redirect):
    Remove, replace with a method in class ui_out.
    (table_begin_ftype): Remove, replace with pure virtual method in
    class ui_out.
    (table_body_ftype): Likewise.
    (table_end_ftype): Likewise.
    (table_header_ftype): Likewise.
    (ui_out_begin_ftype): Likewise.
    (ui_out_end_ftype): Likewise.
    (field_int_ftype): Likewise.
    (field_skip_ftype): Likewise.
    (field_string_ftype): Likewise.
    (field_fmt_ftype): Likewise.
    (spaces_ftype): Likewise.
    (text_ftype): Likewise.
    (message_ftype): Likewise.
    (wrap_hint_ftype): Likewise.
    (flush_ftype): Likewise.
    (redirect_ftype): Likewise.
    (data_destroy_ftype): Likewise.
    (struct ui_out_impl): Remove, replace with class ui_out.
    (ui_out_new): Remove.
    (class ui_out): New class.
    * ui-out.c (struct ui_out): Remove, replaced with class ui_out.
    (current_level): Remove, replace with ui_out method.
    (push_level): Likewise.
    (pop_level): Likewise.
    (uo_table_begin, uo_table_body, uo_table_end, uo_table_header,
    uo_begin, uo_end, uo_field_int, uo_field_skip, uo_field_fmt,
    uo_spaces, uo_text, uo_message, uo_wrap_hint, uo_flush,
    uo_redirect, uo_field_string): Remove.
    (ui_out_table_begin): Replace with ...
    (ui_out::table_begin): ... this.
    (ui_out_table_body): Replace with ...
    (ui_out::table_body): ... this.
    (ui_out_table_end): Replace with ...
    (ui_out::table_end): ... this.
    (ui_out_table_header): Replace with ...
    (ui_out::table_header): ... this.
    (ui_out_begin): Replace with ...
    (ui_out::begin): ... this.
    (ui_out_end): Replace with ...
    (ui_out::end): ... this.
    (ui_out_field_int): Replace with ...
    (ui_out::field_int): ... this.
    (ui_out_field_fmt_int): Replace with ...
    (ui_out::field_fmt_int): ... this.
    (ui_out_field_core_addr): Replace with ...
    (ui_out::field_core_addr): ... this.
    (ui_out_field_stream): Replace with ...
    (ui_out::field_stream): ... this.
    (ui_out_field_skip): Replace with ...
    (ui_out::field_skip): ... this.
    (ui_out_field_string): Replace with ...
    (ui_out::field_string): ... this.
    (ui_out_field_fmt): Replace with ...
    (ui_out::field_fmt): ... this.
    (ui_out_spaces): Replace with ...
    (ui_out::spaces): ... this.
    (ui_out_text): Replace with ...
    (ui_out::text): ... this.
    (ui_out_message): Replace with ...
    (ui_out::message): ... this.
    (ui_out_wrap_hint): Replace with ...
    (ui_out::wrap_hint): ... this.
    (ui_out_flush): Replace with ...
    (ui_out::flush): ... this.
    (ui_out_redirect): Replace with ...
    (ui_out::redirect): ... this.
    (ui_out_test_flags): Replace with ...
    (ui_out::test_flags): ... this.
    (ui_out_is_mi_like_p): Replace with ...
    (ui_out::is_mi_like_p): ... this.
    (verify_field): Replace with ...
    (ui_out::verify_field): ... this.
    (ui_out_query_field): Replace with ...
    (ui_out::query_table_field): ... this.
    (ui_out_data): Remove.
    (ui_out_new): Remove, replace with ...
    (ui_out::ui_out): ... this constructor.
    (do_cleanup_table_end, make_cleanup_ui_out_tuple_begin_end,
    do_cleanup_end, make_cleanup_ui_out_tuple_begin_end,
    make_cleanup_ui_out_list_begin_end): Update fallouts of struct
    ui_out -> class ui_out change.
    * cli-out.c (cli_out_data): Remove.
    (cli_uiout_dtor): Remove.
    (cli_table_begin): Replace with ...
    (cli_ui_out::do_table_begin): ... this new method.
    (cli_table_body): Replace with ...
    (cli_ui_out::do_table_body): ... this new method.
    (cli_table_end): Replace with ...
    (cli_ui_out::do_table_end): ... this new method.
    (cli_table_header): Replace with ...
    (cli_ui_out::do_table_header): ... this new method.
    (cli_begin): Replace with ...
    (cli_ui_out::do_begin): ... this new method.
    (cli_end): Replace with ...
    (cli_ui_out::do_end): ... this new method.
    (cli_field_int): Replace with ...
    (cli_ui_out::do_field_int): ... this new method.
    (cli_field_skip): Replace with ...
    (cli_ui_out::do_field_skip): ... this new method.
    (cli_field_string): Replace with ...
    (cli_ui_out::do_field_string): ... this new method.
    (cli_field_fmt): Replace with ...
    (cli_ui_out::do_field_fmt): ... this new method.
    (cli_spaces): Replace with ...
    (cli_ui_out::do_spaces): ... this new method.
    (cli_text): Replace with ...
    (cli_ui_out::do_text): ... this new method.
    (cli_message): Replace with ...
    (cli_ui_out::do_message): ... this new method.
    (cli_wrap_hint): Replace with ...
    (cli_ui_out::do_wrap_hint): ... this new method.
    (cli_flush): Replace with ...
    (cli_ui_out::do_flush): ... this new method.
    (cli_redirect): Replace with ...
    (cli_ui_out::do_redirect): ... this new method.
    (out_field_fmt): Replace with ...
    (cli_ui_out::out_field_fmt): ... this new method.
    (field_separator): Replace with ...
    (cli_ui_out::field_separator): ... this new method.
    (cli_out_set_stream): Replace with ...
    (cli_ui_out::set_stream): ... this new method.
    (cli_ui_out_impl): Remove.
    (cli_out_data_ctor): Remove.
    (cli_ui_out_impl::cli_ui_out_impl): New constructor.
    (cli_ui_out_impl::~cli_ui_out_impl): New destructor.
    (cli_out_new): Change return type to cli_ui_out *, instantiate a
    cli_ui_out.
    * cli-out.h (cli_ui_out_data): Remove, replace with class
    cli_ui_out.
    (class cli_ui_out): New class.
    (cli_ui_out_impl): Remove.
    (cli_out_data_ctor): Remove.
    (cli_out_new): Change return type to cli_ui_out*.
    (cli_out_set_stream): Remove.
    * cli/cli-interp.c (struct cli_interp) <cli_uiout>: Change type
    to cli_ui_out*.
    (cli_interpreter_resume): Adapt.
    (cli_interpreter_exec): Adapt.
    * mi/mi-out.c (mi_ui_out_data, mi_out_data): Remove.
    (mi_ui_out_impl): Remove.
    (mi_table_begin): Replace with ...
    (mi_ui_out::do_table_begin): ... this.
    (mi_table_body): Replace with ...
    (mi_ui_out::do_table_body): ... this.
    (mi_table_end): Replace with ...
    (mi_ui_out::do_table_end): ... this.
    (mi_table_header): Replace with ...
    (mi_ui_out::do_table_header): ... this.
    (mi_begin): Replace with ...
    (mi_ui_out::do_begin): ... this.
    (mi_end): Replace with ...
    (mi_ui_out::do_end): ... this.
    (mi_field_int): Replace with ...
    (mi_ui_out::do_field_int): ... this.
    (mi_field_skip): Replace with ...
    (mi_ui_out::do_field_skip): ... this.
    (mi_field_string): Replace with ...
    (mi_ui_out::do_field_string): ... this.
    (mi_field_fmt): Replace with ...
    (mi_ui_out::do_field_fmt): ... this.
    (mi_spaces): Replace with ...
    (mi_ui_out::do_spaces): ... this.
    (mi_text): Replace with ...
    (mi_ui_out::do_text): ... this.
    (mi_message): Replace with ...
    (mi_ui_out::do_message): ... this.
    (mi_wrap_hint): Replace with ...
    (mi_ui_out::do_wrap_hint): ... this.
    (mi_flush): Replace with ...
    (mi_ui_out::do_flush): ... this.
    (mi_redirect): Replace with ...
    (mi_ui_out::do_redirect):
    (field_separator): Replace with ...
    (mi_ui_out::field_separator):
    (mi_open): Replace with ...
    (mi_ui_out::open): ... this.
    (mi_close): Replace with ...
    (mi_ui_out::close): ... this.
    (mi_out_rewind): Replace with ...
    (mi_ui_out::rewind): ... this.
    (mi_out_put): Replace with ...
    (mi_ui_out::put): ... this.
    (mi_version): Replace with ...
    (mi_ui_out::version): ... this.
    (mi_out_data_ctor): Replace with ...
    (mi_ui_out::mi_ui_out): ... this.
    (mi_out_data_dtor): Replace with ...
    (mi_ui_out::~mi_ui_out): ... this.
    (mi_out_new): Change return type to mi_ui_out*, instantiate
    an mi_ui_out object.
    (as_mi_ui_out): New function.
    (mi_version): Update fallouts of struct ui_out to class ui_out
    transition.
    (mi_out_put): Likewise.
    (mi_out_rewind): Likewise.
    * mi/mi-out.h (mi_out_new): Change return type to mi_ui_out*.
    * tui/tui-out.c (tui_ui_out_data, tui_out_data, tui_ui_out_impl):
    Remove.
    (tui_field_int): Replace with ...
    (tui_ui_out::do_field_int): ... this.
    (tui_field_string): Replace with ...
    (tui_ui_out::do_field_string): ... this.
    (tui_field_fmt): Replace with ...
    (tui_ui_out::do_field_fmt): ... this.
    (tui_text): Replace with ...
    (tui_ui_out::do_text): ... this.
    (tui_out_new): Change return type to tui_ui_out*, instantiate
    tui_ui_out object.
    (tui_ui_out::tui_ui_out): New.
    * tui/tui-out.h: New file.
    * tui/tui.h (tui_out_new): Move declaration to tui/tui-out.h.
    * tui/tui-io.c: Include tui/tui-out.h.
    (tui_old_uiout): Change type to cli_ui_out*.
    (tui_setup_io): Use dynamic_cast.
    * tui/tui-io.h (tui_old_uiout): Change type to cli_ui_out*.
    * tui/tui-interp.c (tui_resume): Adapt.
    * ada-lang.c (print_it_exception): Update fallouts of struct
    ui_out to class ui_out transition.
    (print_one_exception): Likewise.
    (print_mention_exception): Likewise.
    * ada-tasks.c (print_ada_task_info): Likewise.
    (info_task): Likewise.
    (task_command): Likewise.
    * auto-load.c (print_script): Likewise.
    (auto_load_info_scripts): Likewise.
    (info_auto_load_cmd): Likewise.
    * break-catch-sig.c (signal_catchpoint_print_one): Likewise.
    * break-catch-syscall.c (print_it_catch_syscall): Likewise.
    (print_one_catch_syscall): Likewise.
    * break-catch-throw.c (print_it_exception_catchpoint): Likewise.
    (print_one_exception_catchpoint): Likewise.
    (print_one_detail_exception_catchpoint): Likewise.
    (print_mention_exception_catchpoint): Likewise.
    * breakpoint.c (maybe_print_thread_hit_breakpoint): Likewise.
    (print_solib_event): Likewise.
    (watchpoint_check): Likewise.
    (wrap_indent_at_field): Likewise.
    (print_breakpoint_location): Likewise.
    (output_thread_groups): Likewise.
    (print_one_breakpoint_location): Likewise.
    (breakpoint_1): Likewise.
    (default_collect_info): Likewise.
    (watchpoints_info): Likewise.
    (print_it_catch_fork): Likewise.
    (print_one_catch_fork): Likewise.
    (print_it_catch_vfork): Likewise.
    (print_one_catch_vfork): Likewise.
    (print_it_catch_solib): Likewise.
    (print_one_catch_solib): Likewise.
    (print_it_catch_exec): Likewise.
    (print_one_catch_exec): Likewise.
    (mention): Likewise.
    (print_it_ranged_breakpoint): Likewise.
    (print_one_ranged_breakpoint): Likewise.
    (print_one_detail_ranged_breakpoint): Likewise.
    (print_mention_ranged_breakpoint): Likewise.
    (print_it_watchpoint): Likewise.
    (print_mention_watchpoint): Likewise.
    (print_it_masked_watchpoint): Likewise.
    (print_one_detail_masked_watchpoint): Likewise.
    (print_mention_masked_watchpoint): Likewise.
    (bkpt_print_it): Likewise.
    (tracepoint_print_one_detail): Likewise.
    (tracepoint_print_mention): Likewise.
    (update_static_tracepoint): Likewise.
    (tracepoints_info): Likewise.
    (save_breakpoints): Likewise.
    * cli/cli-cmds.c (complete_command): Likewise.
    * cli/cli-logging.c (set_logging_redirect): Likewise.
    (pop_output_files): Likewise.
    (handle_redirections): Likewise.
    * cli/cli-script.c (print_command_lines): Likewise.
    * cli/cli-setshow.c (do_show_command): Likewise.
    (cmd_show_list): Likewise.
    * cp-abi.c (list_cp_abis): Likewise.
    (show_cp_abi_cmd): Likewise.
    * darwin-nat-info.c (darwin_debug_regions_recurse): Likewise.
    * disasm.c (gdb_pretty_print_insn): Likewise.
    (do_mixed_source_and_assembly_deprecated): Likewise.
    (do_mixed_source_and_assembly): Likewise.
    * gdb_bfd.c (print_one_bfd): Likewise.
    (maintenance_info_bfds): Likewise.
    * guile/scm-breakpoint.c (gdbscm_breakpoint_commands): Likewise.
    * guile/scm-ports.c (ioscm_with_output_to_port_worker): Likewise.
    * i386-linux-tdep.c (i386_linux_handle_segmentation_fault): Likewise.
    * i386-tdep.c (i386_mpx_print_bounds): Likewise.
    * infcmd.c (run_command_1): Likewise.
    (print_return_value_1): Likewise.
    * inferior.c (print_selected_inferior): Likewise.
    (print_inferior): Likewise.
    * infrun.c (print_end_stepping_range_reason): Likewise.
    (print_signal_exited_reason): Likewise.
    (print_exited_reason): Likewise.
    (print_signal_received_reason): Likewise.
    (print_no_history_reason): Likewise.
    * interps.c (interp_set): Likewise.
    * linespec.c (decode_line_full): Likewise.
    * linux-thread-db.c (info_auto_load_libthread_db): Likewise.
    * mi/mi-cmd-env.c (mi_cmd_env_pwd): Likewise.
    (mi_cmd_env_path): Likewise.
    (mi_cmd_env_dir): Likewise.
    (mi_cmd_inferior_tty_show): Likewise.
    * mi/mi-cmd-file.c (mi_cmd_file_list_exec_source_file): Likewise.
    (print_partial_file_name): Likewise.
    (mi_cmd_file_list_exec_source_files): Likewise.
    * mi/mi-cmd-info.c (mi_cmd_info_ada_exceptions): Likewise.
    (mi_cmd_info_gdb_mi_command): Likewise.
    * mi/mi-cmd-stack.c (mi_cmd_stack_info_depth): Likewise.
    (mi_cmd_stack_list_args): Likewise.
    (list_arg_or_local): Likewise.
    * mi/mi-cmd-var.c (print_varobj): Likewise.
    (mi_cmd_var_create): Likewise.
    (mi_cmd_var_delete): Likewise.
    (mi_cmd_var_set_format): Likewise.
    (mi_cmd_var_show_format): Likewise.
    (mi_cmd_var_info_num_children): Likewise.
    (mi_cmd_var_list_children): Likewise.
    (mi_cmd_var_info_type): Likewise.
    (mi_cmd_var_info_path_expression): Likewise.
    (mi_cmd_var_info_expression): Likewise.
    (mi_cmd_var_show_attributes): Likewise.
    (mi_cmd_var_evaluate_expression): Likewise.
    (mi_cmd_var_assign): Likewise.
    (varobj_update_one): Likewise.
    * mi/mi-interp.c (as_mi_interp): Likewise.
    (mi_on_normal_stop_1): Likewise.
    (mi_tsv_modified): Likewise.
    (mi_breakpoint_created): Likewise.
    (mi_breakpoint_modified): Likewise.
    (mi_solib_loaded): Likewise.
    (mi_solib_unloaded): Likewise.
    (mi_command_param_changed): Likewise.
    (mi_memory_changed): Likewise.
    (mi_user_selected_context_changed): Likewise.
    * mi/mi-main.c (print_one_inferior): Likewise.
    (output_cores): Likewise.
    (list_available_thread_groups): Likewise.
    (mi_cmd_data_list_register_names): Likewise.
    (mi_cmd_data_list_changed_registers): Likewise.
    (output_register): Likewise.
    (mi_cmd_data_evaluate_expression): Likewise.
    (mi_cmd_data_read_memory): Likewise.
    (mi_cmd_data_read_memory_bytes): Likewise.
    (mi_cmd_list_features): Likewise.
    (mi_cmd_list_target_features): Likewise.
    (mi_cmd_add_inferior): Likewise.
    (mi_execute_command): Likewise.
    (mi_load_progress): Likewise.
    (print_variable_or_computed): Likewise.
    (mi_cmd_trace_frame_collected): Likewise.
    * mi/mi-symbol-cmds.c (mi_cmd_symbol_list_lines): Likewise.
    * osdata.c (info_osdata_command): Likewise.
    * probe.c (gen_ui_out_table_header_info): Likewise.
    (print_ui_out_not_applicables): Likewise.
    (print_ui_out_info): Likewise.
    (info_probes_for_ops): Likewise.
    (enable_probes_command): Likewise.
    (disable_probes_command): Likewise.
    * progspace.c (print_program_space): Likewise.
    * python/py-breakpoint.c (bppy_get_commands): Likewise.
    * python/py-framefilter.c (py_print_type): Likewise.
    (py_print_value): Likewise.
    (py_print_single_arg): Likewise.
    (enumerate_args): Likewise.
    (enumerate_locals): Likewise.
    (py_print_args): Likewise.
    (py_print_frame): Likewise.
    * record-btrace.c (btrace_ui_out_decode_error): Likewise.
    (btrace_call_history_insn_range): Likewise.
    (btrace_call_history_src_line): Likewise.
    (btrace_call_history): Likewise.
    * remote.c (show_remote_cmd): Likewise.
    * skip.c (skip_info): Likewise.
    * solib.c (info_sharedlibrary_command): Likewise.
    * source.c (print_source_lines_base): Likewise.
    * spu-tdep.c (info_spu_event_command): Likewise.
    (info_spu_signal_command): Likewise.
    (info_spu_mailbox_list): Likewise.
    (info_spu_dma_cmdlist): Likewise.
    (info_spu_dma_command): Likewise.
    (info_spu_proxydma_command): Likewise.
    * stack.c (print_stack_frame): Likewise.
    (print_frame_arg): Likewise.
    (read_frame_arg): Likewise.
    (print_frame_args): Likewise.
    (print_frame_info): Likewise.
    (print_frame): Likewise.
    * symfile.c (load_progress): Likewise.
    (generic_load): Likewise.
    (print_transfer_performance): Likewise.
    * thread.c (do_captured_list_thread_ids): Likewise.
    (print_thread_info_1): Likewise.
    (restore_selected_frame): Likewise.
    (do_captured_thread_select): Likewise.
    (print_selected_thread_frame): Likewise.
    * top.c (execute_command_to_string): Likewise.
    * tracepoint.c (tvariables_info_1): Likewise.
    (trace_status_mi): Likewise.
    (tfind_1): Likewise.
    (print_one_static_tracepoint_marker): Likewise.
    (info_static_tracepoint_markers_command): Likewise.
    * utils.c (do_ui_out_redirect_pop): Likewise.
    (fputs_maybe_filtered): Likewise.

6 files changed, 101 insertions, 107 deletions

diff --git a/gdb/tui/tui-interp.c b/gdb/tui/tui-interp.c
index 8d35124..3e8442e 100644
--- a/gdb/tui/tui-interp.c
+++ b/gdb/tui/tui-interp.c
@@ -252,10 +252,10 @@ tui_resume (void *data)
      previously writing to gdb_stdout, then set it to the new
      gdb_stdout afterwards.  */
 
-  stream = cli_out_set_stream (tui_old_uiout, gdb_stdout);
+  stream = tui_old_uiout->set_stream (gdb_stdout);
   if (stream != gdb_stdout)
     {
-      cli_out_set_stream (tui_old_uiout, stream);
+      tui_old_uiout->set_stream (stream);
       stream = NULL;
     }
 
@@ -264,7 +264,7 @@ tui_resume (void *data)
   ui->input_handler = command_line_handler;
 
   if (stream != NULL)
-    cli_out_set_stream (tui_old_uiout, gdb_stdout);
+    tui_old_uiout->set_stream (gdb_stdout);
 
   if (tui_start_enabled)
     tui_enable ();
diff --git a/gdb/tui/tui-io.c b/gdb/tui/tui-io.c
index 93bed88..cde679c 100644
--- a/gdb/tui/tui-io.c
+++ b/gdb/tui/tui-io.c
@@ -32,6 +32,7 @@
 #include "tui/tui-win.h"
 #include "tui/tui-wingeneral.h"
 #include "tui/tui-file.h"
+#include "tui/tui-out.h"
 #include "ui-out.h"
 #include "cli-out.h"
 #include <fcntl.h>
@@ -114,7 +115,7 @@ struct ui_out *tui_out;
 /* GDB output files in non-curses mode.  */
 static struct ui_file *tui_old_stdout;
 static struct ui_file *tui_old_stderr;
-struct ui_out *tui_old_uiout;
+cli_ui_out *tui_old_uiout;
 
 /* Readline previous hooks.  */
 static rl_getc_func_t *tui_old_rl_getc_function;
@@ -459,7 +460,8 @@ tui_setup_io (int mode)
       /* Keep track of previous gdb output.  */
       tui_old_stdout = gdb_stdout;
       tui_old_stderr = gdb_stderr;
-      tui_old_uiout = current_uiout;
+      tui_old_uiout = dynamic_cast<cli_ui_out *> (current_uiout);
+      gdb_assert (tui_old_uiout != nullptr);
 
       /* Reconfigure gdb output.  */
       gdb_stdout = tui_stdout;
diff --git a/gdb/tui/tui-io.h b/gdb/tui/tui-io.h
index 67c0273..a080529 100644
--- a/gdb/tui/tui-io.h
+++ b/gdb/tui/tui-io.h
@@ -23,6 +23,7 @@
 #define TUI_IO_H
 
 struct ui_out;
+class cli_ui_out;
 
 /* Print the string in the curses command window.  */
 extern void tui_puts (const char *);
@@ -45,7 +46,7 @@ extern void tui_redisplay_readline (void);
 extern char *tui_expand_tabs (const char *, int);
 
 extern struct ui_out *tui_out;
-extern struct ui_out *tui_old_uiout;
+extern cli_ui_out *tui_old_uiout;
 
 extern int key_is_start_sequence (int ch);
 extern int key_is_end_sequence (int ch);
diff --git a/gdb/tui/tui-out.c b/gdb/tui/tui-out.c
index a5f0541..90c581c 100644
--- a/gdb/tui/tui-out.c
+++ b/gdb/tui/tui-out.c
@@ -22,156 +22,101 @@
 
 #include "defs.h"
 #include "ui-out.h"
-#include "cli-out.h"
+#include "tui-out.h"
 #include "tui.h"
-struct tui_ui_out_data
-  {
-    struct cli_ui_out_data base;
-
-    int line;
-    int start_of_line;
-  };
-typedef struct tui_ui_out_data tui_out_data;
-
-/* This is the TUI ui-out implementation functions vector.  It is
-   initialized below in _initialize_tui_out, inheriting the CLI
-   version, and overriding a few methods.  */
-
-static struct ui_out_impl tui_ui_out_impl;
 
 /* Output an int field.  */
 
-static void
-tui_field_int (struct ui_out *uiout, 
-	       int fldno, int width,
-	       enum ui_align alignment,
-	       const char *fldname, 
-	       int value)
+void
+tui_ui_out::do_field_int (int fldno, int width, ui_align alignment,
+			  const char *fldname, int value)
 {
-  tui_out_data *data = (tui_out_data *) ui_out_data (uiout);
-
-  if (data->base.suppress_output)
+  if (suppress_output ())
     return;
 
   /* Don't print line number, keep it for later.  */
-  if (data->start_of_line == 0 && strcmp (fldname, "line") == 0)
+  if (m_start_of_line == 0 && strcmp (fldname, "line") == 0)
     {
-      data->start_of_line ++;
-      data->line = value;
+      m_start_of_line++;
+      m_line = value;
       return;
     }
-  data->start_of_line ++;
+  m_start_of_line++;
 
-  (*cli_ui_out_impl.field_int) (uiout, fldno,
-				width, alignment, fldname, value);
+  cli_ui_out::do_field_int (fldno, width, alignment, fldname, value);
 }
 
 /* Other cli_field_* end up here so alignment and field separators are
    both handled by tui_field_string.  */
 
-static void
-tui_field_string (struct ui_out *uiout,
-		  int fldno, int width,
-		  enum ui_align align,
-		  const char *fldname,
-		  const char *string)
+void
+tui_ui_out::do_field_string (int fldno, int width, ui_align align,
+			     const char *fldname, const char *string)
 {
-  tui_out_data *data = (tui_out_data *) ui_out_data (uiout);
-
-  if (data->base.suppress_output)
+  if (suppress_output ())
     return;
 
-  if (fldname && data->line > 0 && strcmp (fldname, "fullname") == 0)
+  if (fldname && m_line > 0 && strcmp (fldname, "fullname") == 0)
     {
-      data->start_of_line ++;
-      if (data->line > 0)
+      m_start_of_line++;
+      if (m_line > 0)
         {
-          tui_show_source (string, data->line);
+          tui_show_source (string, m_line);
         }
       return;
     }
   
-  data->start_of_line++;
+  m_start_of_line++;
 
-  (*cli_ui_out_impl.field_string) (uiout, fldno,
-				   width, align,
-				   fldname, string);
+  cli_ui_out::do_field_string (fldno, width, align, fldname, string);
 }
 
 /* This is the only field function that does not align.  */
 
-static void
-tui_field_fmt (struct ui_out *uiout, int fldno,
-	       int width, enum ui_align align,
-	       const char *fldname,
-	       const char *format,
-	       va_list args)
+void
+tui_ui_out::do_field_fmt (int fldno, int width, ui_align align,
+			  const char *fldname, const char *format,
+			  va_list args)
 {
-  tui_out_data *data = (tui_out_data *) ui_out_data (uiout);
-
-  if (data->base.suppress_output)
+  if (suppress_output ())
     return;
 
-  data->start_of_line++;
+  m_start_of_line++;
 
-  (*cli_ui_out_impl.field_fmt) (uiout, fldno,
-				width, align,
-				fldname, format, args);
+  cli_ui_out::do_field_fmt (fldno, width, align, fldname, format, args);
 }
 
-static void
-tui_text (struct ui_out *uiout, const char *string)
+void
+tui_ui_out::do_text (const char *string)
 {
-  tui_out_data *data = (tui_out_data *) ui_out_data (uiout);
-
-  if (data->base.suppress_output)
+  if (suppress_output ())
     return;
-  data->start_of_line ++;
-  if (data->line > 0)
+
+  m_start_of_line++;
+  if (m_line > 0)
     {
       if (strchr (string, '\n') != 0)
         {
-          data->line = -1;
-          data->start_of_line = 0;
+          m_line = -1;
+          m_start_of_line = 0;
         }
       return;
     }
   if (strchr (string, '\n'))
-    data->start_of_line = 0;
+    m_start_of_line = 0;
 
-  (*cli_ui_out_impl.text) (uiout, string);
+  cli_ui_out::do_text (string);
 }
 
-struct ui_out *
-tui_out_new (struct ui_file *stream)
+tui_ui_out::tui_ui_out (ui_file *stream)
+: cli_ui_out (stream, 0),
+  m_line (0),
+  m_start_of_line (-1)
 {
-  ui_out_flags flags = 0;
-
-  tui_out_data *data = new tui_out_data ();
-
-  /* Initialize base "class".  */
-  cli_out_data_ctor (&data->base, stream);
-
-  /* Initialize our fields.  */
-  data->line = -1;
-  data->start_of_line = 0;
-
-  return ui_out_new (&tui_ui_out_impl, data, flags);
 }
 
-/* Standard gdb initialization hook.  */
-
-extern void _initialize_tui_out (void);
-
-void
-_initialize_tui_out (void)
+tui_ui_out *
+tui_out_new (struct ui_file *stream)
 {
-  /* Inherit the CLI version.  */
-  tui_ui_out_impl = cli_ui_out_impl;
-
-  /* Override a few methods.  */
-  tui_ui_out_impl.field_int = tui_field_int;
-  tui_ui_out_impl.field_string = tui_field_string;
-  tui_ui_out_impl.field_fmt = tui_field_fmt;
-  tui_ui_out_impl.text = tui_text;
+  return new tui_ui_out (stream);
 }
diff --git a/gdb/tui/tui-out.h b/gdb/tui/tui-out.h
new file mode 100644
index 0000000..da7821a
--- /dev/null
+++ b/gdb/tui/tui-out.h
@@ -0,0 +1,48 @@
+/* Copyright (C) 2016 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef TUI_OUT_H
+#define TUI_OUT_H
+
+#include "cli-out.h"
+
+class tui_ui_out : public cli_ui_out
+{
+public:
+
+  explicit tui_ui_out (ui_file *stream);
+
+protected:
+
+  void do_field_int (int fldno, int width, ui_align align, const char *fldname,
+		  int value) override;
+  void do_field_string (int fldno, int width, ui_align align, const char *fldname,
+		     const char *string) override;
+  void do_field_fmt (int fldno, int width, ui_align align, const char *fldname,
+		  const char *format, va_list args) override
+    ATTRIBUTE_PRINTF (6,0);
+  void do_text (const char *string) override;
+
+private:
+
+  int m_line;
+  int m_start_of_line;
+};
+
+extern tui_ui_out *tui_out_new (struct ui_file *stream);
+
+#endif
diff --git a/gdb/tui/tui.h b/gdb/tui/tui.h
index 5d56df0..aaae851 100644
--- a/gdb/tui/tui.h
+++ b/gdb/tui/tui.h
@@ -93,8 +93,6 @@ extern int tui_active;
 
 extern void tui_show_source (const char *fullname, int line);
 
-extern struct ui_out *tui_out_new (struct ui_file *stream);
-
 /* tui-layout.c */
 extern enum tui_status tui_set_layout_by_name (const char *);