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best but I'm sure there are some missing or outdated info in there...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.

10 files changed, 361 insertions, 394 deletions

diff --git a/gdb/mi/mi-cmd-env.c b/gdb/mi/mi-cmd-env.c
index 7b52c985a5..868631705e 100644
--- a/gdb/mi/mi-cmd-env.c
+++ b/gdb/mi/mi-cmd-env.c
@@ -84,7 +84,7 @@ mi_cmd_env_pwd (char *command, char **argv, int argc)
     error (_("-environment-pwd: error finding name of working directory: %s"),
            safe_strerror (errno));
     
-  ui_out_field_string (uiout, "cwd", gdb_dirbuf);
+  uiout->field_string ("cwd", gdb_dirbuf);
 }
 
 /* Change working directory.  */
@@ -181,7 +181,7 @@ mi_cmd_env_path (char *command, char **argv, int argc)
   set_in_environ (current_inferior ()->environment, path_var_name, exec_path);
   xfree (exec_path);
   env = get_in_environ (current_inferior ()->environment, path_var_name);
-  ui_out_field_string (uiout, "path", env);
+  uiout->field_string ("path", env);
 }
 
 /* Add zero or more directories to the front of the source path.  */
@@ -241,7 +241,7 @@ mi_cmd_env_dir (char *command, char **argv, int argc)
   for (i = argc - 1; i >= 0; --i)
     env_mod_path (argv[i], &source_path);
 
-  ui_out_field_string (uiout, "source-path", source_path);
+  uiout->field_string ("source-path", source_path);
   forget_cached_source_info ();
 }
 
@@ -264,8 +264,7 @@ mi_cmd_inferior_tty_show (char *command, char **argv, int argc)
     error (_("-inferior-tty-show: Usage: No args"));
 
   if (inferior_io_terminal)
-    ui_out_field_string (current_uiout,
-			 "inferior_tty_terminal", inferior_io_terminal);
+    current_uiout->field_string ("inferior_tty_terminal", inferior_io_terminal);
 }
 
 void 
diff --git a/gdb/mi/mi-cmd-file.c b/gdb/mi/mi-cmd-file.c
index 310cd5b6e7..cf1faa5d88 100644
--- a/gdb/mi/mi-cmd-file.c
+++ b/gdb/mi/mi-cmd-file.c
@@ -49,15 +49,13 @@ mi_cmd_file_list_exec_source_file (char *command, char **argv, int argc)
     error (_("-file-list-exec-source-file: No symtab"));
 
   /* Print to the user the line, filename and fullname.  */
-  ui_out_field_int (uiout, "line", st.line);
-  ui_out_field_string (uiout, "file",
-		       symtab_to_filename_for_display (st.symtab));
+  uiout->field_int ("line", st.line);
+  uiout->field_string ("file", symtab_to_filename_for_display (st.symtab));
 
-  ui_out_field_string (uiout, "fullname", symtab_to_fullname (st.symtab));
+  uiout->field_string ("fullname", symtab_to_fullname (st.symtab));
 
-  ui_out_field_int (uiout, "macro-info",
-		    COMPUNIT_MACRO_TABLE
-		      (SYMTAB_COMPUNIT (st.symtab)) != NULL);
+  uiout->field_int ("macro-info",
+		    COMPUNIT_MACRO_TABLE (SYMTAB_COMPUNIT (st.symtab)) != NULL);
 }
 
 /* A callback for map_partial_symbol_filenames.  */
@@ -68,14 +66,14 @@ print_partial_file_name (const char *filename, const char *fullname,
 {
   struct ui_out *uiout = current_uiout;
 
-  ui_out_begin (uiout, ui_out_type_tuple, NULL);
+  uiout->begin (ui_out_type_tuple, NULL);
 
-  ui_out_field_string (uiout, "file", filename);
+  uiout->field_string ("file", filename);
 
   if (fullname)
-    ui_out_field_string (uiout, "fullname", fullname);
+    uiout->field_string ("fullname", fullname);
 
-  ui_out_end (uiout, ui_out_type_tuple);
+  uiout->end (ui_out_type_tuple);
 }
 
 void
@@ -90,21 +88,21 @@ mi_cmd_file_list_exec_source_files (char *command, char **argv, int argc)
     error (_("-file-list-exec-source-files: Usage: No args"));
 
   /* Print the table header.  */
-  ui_out_begin (uiout, ui_out_type_list, "files");
+  uiout->begin (ui_out_type_list, "files");
 
   /* Look at all of the file symtabs.  */
   ALL_FILETABS (objfile, cu, s)
   {
-    ui_out_begin (uiout, ui_out_type_tuple, NULL);
+    uiout->begin (ui_out_type_tuple, NULL);
 
-    ui_out_field_string (uiout, "file", symtab_to_filename_for_display (s));
-    ui_out_field_string (uiout, "fullname", symtab_to_fullname (s));
+    uiout->field_string ("file", symtab_to_filename_for_display (s));
+    uiout->field_string ("fullname", symtab_to_fullname (s));
 
-    ui_out_end (uiout, ui_out_type_tuple);
+    uiout->end (ui_out_type_tuple);
   }
 
   map_symbol_filenames (print_partial_file_name, NULL,
 			1 /*need_fullname*/);
 
-  ui_out_end (uiout, ui_out_type_list);
+  uiout->end (ui_out_type_list);
 }
diff --git a/gdb/mi/mi-cmd-info.c b/gdb/mi/mi-cmd-info.c
index 4d114742a3..480fd2566e 100644
--- a/gdb/mi/mi-cmd-info.c
+++ b/gdb/mi/mi-cmd-info.c
@@ -53,17 +53,17 @@ mi_cmd_info_ada_exceptions (char *command, char **argv, int argc)
 
   make_cleanup_ui_out_table_begin_end
     (uiout, 2, VEC_length (ada_exc_info, exceptions), "ada-exceptions");
-  ui_out_table_header (uiout, 1, ui_left, "name", "Name");
-  ui_out_table_header (uiout, 1, ui_left, "address", "Address");
-  ui_out_table_body (uiout);
+  uiout->table_header (1, ui_left, "name", "Name");
+  uiout->table_header (1, ui_left, "address", "Address");
+  uiout->table_body ();
 
   for (ix = 0; VEC_iterate(ada_exc_info, exceptions, ix, info); ix++)
     {
       struct cleanup *sub_chain;
 
       sub_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-      ui_out_field_string (uiout, "name", info->name);
-      ui_out_field_core_addr (uiout, "address", gdbarch, info->addr);
+      uiout->field_string ("name", info->name);
+      uiout->field_core_addr ("address", gdbarch, info->addr);
 
       do_cleanups (sub_chain);
     }
@@ -96,7 +96,7 @@ mi_cmd_info_gdb_mi_command (char *command, char **argv, int argc)
   cmd = mi_lookup (cmd_name);
 
   old_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "command");
-  ui_out_field_string (uiout, "exists", cmd != NULL ? "true" : "false");
+  uiout->field_string ("exists", cmd != NULL ? "true" : "false");
   do_cleanups (old_chain);
 }
 
diff --git a/gdb/mi/mi-cmd-stack.c b/gdb/mi/mi-cmd-stack.c
index 390fc7e833..271cb840ca 100644
--- a/gdb/mi/mi-cmd-stack.c
+++ b/gdb/mi/mi-cmd-stack.c
@@ -202,7 +202,7 @@ mi_cmd_stack_info_depth (char *command, char **argv, int argc)
        i++, fi = get_prev_frame (fi))
     QUIT;
 
-  ui_out_field_int (current_uiout, "depth", i);
+  current_uiout->field_int ("depth", i);
 }
 
 /* Print a list of the locals for the current frame.  With argument of
@@ -391,7 +391,7 @@ mi_cmd_stack_list_args (char *command, char **argv, int argc)
 
 	  QUIT;
 	  cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
-	  ui_out_field_int (uiout, "level", i);
+	  uiout->field_int ("level", i);
 	  list_args_or_locals (arguments, print_values, fi, skip_unavailable);
 	  do_cleanups (cleanup_frame);
 	}
@@ -520,16 +520,16 @@ list_arg_or_local (const struct frame_arg *arg, enum what_to_list what,
   fputs_filtered (SYMBOL_PRINT_NAME (arg->sym), stb);
   if (arg->entry_kind == print_entry_values_only)
     fputs_filtered ("@entry", stb);
-  ui_out_field_stream (uiout, "name", stb);
+  uiout->field_stream ("name", stb);
 
   if (what == all && SYMBOL_IS_ARGUMENT (arg->sym))
-    ui_out_field_int (uiout, "arg", 1);
+    uiout->field_int ("arg", 1);
 
   if (values == PRINT_SIMPLE_VALUES)
     {
       check_typedef (arg->sym->type);
       type_print (arg->sym->type, "", stb, -1);
-      ui_out_field_stream (uiout, "type", stb);
+      uiout->field_stream ("type", stb);
     }
 
   if (arg->val || arg->error)
@@ -558,7 +558,7 @@ list_arg_or_local (const struct frame_arg *arg, enum what_to_list what,
       if (error_message != NULL)
 	fprintf_filtered (stb, _("<error reading variable: %s>"),
 			  error_message);
-      ui_out_field_stream (uiout, "value", stb);
+      uiout->field_stream ("value", stb);
     }
 
   do_cleanups (old_chain);
diff --git a/gdb/mi/mi-cmd-var.c b/gdb/mi/mi-cmd-var.c
index 4131f99b2a..f0a9056c4e 100644
--- a/gdb/mi/mi-cmd-var.c
+++ b/gdb/mi/mi-cmd-var.c
@@ -51,39 +51,39 @@ print_varobj (struct varobj *var, enum print_values print_values,
   struct ui_out *uiout = current_uiout;
   int thread_id;
 
-  ui_out_field_string (uiout, "name", varobj_get_objname (var));
+  uiout->field_string ("name", varobj_get_objname (var));
   if (print_expression)
     {
       std::string exp = varobj_get_expression (var);
 
-      ui_out_field_string (uiout, "exp", exp.c_str ());
+      uiout->field_string ("exp", exp.c_str ());
     }
-  ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
+  uiout->field_int ("numchild", varobj_get_num_children (var));
   
   if (mi_print_value_p (var, print_values))
     {
       std::string val = varobj_get_value (var);
 
-      ui_out_field_string (uiout, "value", val.c_str ());
+      uiout->field_string ("value", val.c_str ());
     }
 
   std::string type = varobj_get_type (var);
   if (!type.empty ())
-    ui_out_field_string (uiout, "type", type.c_str ());
+    uiout->field_string ("type", type.c_str ());
 
   thread_id = varobj_get_thread_id (var);
   if (thread_id > 0)
-    ui_out_field_int (uiout, "thread-id", thread_id);
+    uiout->field_int ("thread-id", thread_id);
 
   if (varobj_get_frozen (var))
-    ui_out_field_int (uiout, "frozen", 1);
+    uiout->field_int ("frozen", 1);
 
   gdb::unique_xmalloc_ptr<char> display_hint = varobj_get_display_hint (var);
   if (display_hint)
-    ui_out_field_string (uiout, "displayhint", display_hint.get ());
+    uiout->field_string ("displayhint", display_hint.get ());
 
   if (varobj_is_dynamic_p (var))
-    ui_out_field_int (uiout, "dynamic", 1);
+    uiout->field_int ("dynamic", 1);
 }
 
 /* VAROBJ operations */
@@ -144,7 +144,7 @@ mi_cmd_var_create (char *command, char **argv, int argc)
 
   print_varobj (var, PRINT_ALL_VALUES, 0 /* don't print expression */);
 
-  ui_out_field_int (uiout, "has_more", varobj_has_more (var, 0));
+  uiout->field_int ("has_more", varobj_has_more (var, 0));
 
   do_cleanups (old_cleanups);
 }
@@ -197,7 +197,7 @@ mi_cmd_var_delete (char *command, char **argv, int argc)
 
   numdel = varobj_delete (var, children_only_p);
 
-  ui_out_field_int (uiout, "ndeleted", numdel);
+  uiout->field_int ("ndeleted", numdel);
 
   do_cleanups (old_cleanups);
 }
@@ -250,11 +250,11 @@ mi_cmd_var_set_format (char *command, char **argv, int argc)
   varobj_set_display_format (var, format);
 
   /* Report the new current format.  */
-  ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
+  uiout->field_string ("format", varobj_format_string[(int) format]);
  
   /* Report the value in the new format.  */
   std::string val = varobj_get_value (var);
-  ui_out_field_string (uiout, "value", val.c_str ());
+  uiout->field_string ("value", val.c_str ());
 }
 
 void
@@ -314,7 +314,7 @@ mi_cmd_var_show_format (char *command, char **argv, int argc)
   format = varobj_get_display_format (var);
 
   /* Report the current format.  */
-  ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
+  uiout->field_string ("format", varobj_format_string[(int) format]);
 }
 
 void
@@ -329,7 +329,7 @@ mi_cmd_var_info_num_children (char *command, char **argv, int argc)
   /* Get varobj handle, if a valid var obj name was specified.  */
   var = varobj_get_handle (argv[0]);
 
-  ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
+  uiout->field_int ("numchild", varobj_get_num_children (var));
 }
 
 /* Return 1 if given the argument PRINT_VALUES we should display
@@ -397,7 +397,7 @@ mi_cmd_var_list_children (char *command, char **argv, int argc)
     }
 
   children = varobj_list_children (var, &from, &to);
-  ui_out_field_int (uiout, "numchild", to - from);
+  uiout->field_int ("numchild", to - from);
   if (argc == 2 || argc == 4)
     print_values = mi_parse_print_values (argv[0]);
   else
@@ -405,7 +405,7 @@ mi_cmd_var_list_children (char *command, char **argv, int argc)
 
   gdb::unique_xmalloc_ptr<char> display_hint = varobj_get_display_hint (var);
   if (display_hint)
-    ui_out_field_string (uiout, "displayhint", display_hint.get ());
+    uiout->field_string ("displayhint", display_hint.get ());
 
   if (from < to)
     {
@@ -430,7 +430,7 @@ mi_cmd_var_list_children (char *command, char **argv, int argc)
       do_cleanups (cleanup_children);
     }
 
-  ui_out_field_int (uiout, "has_more", varobj_has_more (var, to));
+  uiout->field_int ("has_more", varobj_has_more (var, to));
 }
 
 void
@@ -446,7 +446,7 @@ mi_cmd_var_info_type (char *command, char **argv, int argc)
   var = varobj_get_handle (argv[0]);
 
   std::string type_name = varobj_get_type (var);
-  ui_out_field_string (uiout, "type", type_name.c_str ());
+  uiout->field_string ("type", type_name.c_str ());
 }
 
 void
@@ -463,7 +463,7 @@ mi_cmd_var_info_path_expression (char *command, char **argv, int argc)
   
   const char *path_expr = varobj_get_path_expr (var);
 
-  ui_out_field_string (uiout, "path_expr", path_expr);
+  uiout->field_string ("path_expr", path_expr);
 }
 
 void
@@ -481,10 +481,10 @@ mi_cmd_var_info_expression (char *command, char **argv, int argc)
 
   lang = varobj_get_language (var);
 
-  ui_out_field_string (uiout, "lang", lang->la_natural_name);
+  uiout->field_string ("lang", lang->la_natural_name);
 
   std::string exp = varobj_get_expression (var);
-  ui_out_field_string (uiout, "exp", exp.c_str ());
+  uiout->field_string ("exp", exp.c_str ());
 }
 
 void
@@ -508,7 +508,7 @@ mi_cmd_var_show_attributes (char *command, char **argv, int argc)
   else
     attstr = "noneditable";
 
-  ui_out_field_string (uiout, "attr", attstr);
+  uiout->field_string ("attr", attstr);
 }
 
 void
@@ -568,13 +568,13 @@ mi_cmd_var_evaluate_expression (char *command, char **argv, int argc)
     {
       std::string val = varobj_get_formatted_value (var, format);
 
-      ui_out_field_string (uiout, "value", val.c_str ());
+      uiout->field_string ("value", val.c_str ());
     }
   else
     {
       std::string val = varobj_get_value (var);
 
-      ui_out_field_string (uiout, "value", val.c_str ());
+      uiout->field_string ("value", val.c_str ());
     }
 }
 
@@ -605,7 +605,7 @@ mi_cmd_var_assign (char *command, char **argv, int argc)
 	     "expression to variable object"));
 
   std::string val = varobj_get_value (var);
-  ui_out_field_string (uiout, "value", val.c_str ());
+  uiout->field_string ("value", val.c_str ());
 }
 
 /* Type used for parameters passing to mi_cmd_var_update_iter.  */
@@ -718,7 +718,7 @@ varobj_update_one (struct varobj *var, enum print_values print_values,
 
       if (mi_version (uiout) > 1)
 	make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-      ui_out_field_string (uiout, "name", varobj_get_objname (r->varobj));
+      uiout->field_string ("name", varobj_get_objname (r->varobj));
 
       switch (r->status)
 	{
@@ -727,48 +727,47 @@ varobj_update_one (struct varobj *var, enum print_values print_values,
 	    {
 	      std::string val = varobj_get_value (r->varobj);
 
-	      ui_out_field_string (uiout, "value", val.c_str ());
+	      uiout->field_string ("value", val.c_str ());
 	    }
-	  ui_out_field_string (uiout, "in_scope", "true");
+	  uiout->field_string ("in_scope", "true");
 	  break;
         case VAROBJ_NOT_IN_SCOPE:
-          ui_out_field_string (uiout, "in_scope", "false");
+          uiout->field_string ("in_scope", "false");
 	  break;
         case VAROBJ_INVALID:
-          ui_out_field_string (uiout, "in_scope", "invalid");
+          uiout->field_string ("in_scope", "invalid");
  	  break;
 	}
 
       if (r->status != VAROBJ_INVALID)
 	{
 	  if (r->type_changed)
-	    ui_out_field_string (uiout, "type_changed", "true");
+	    uiout->field_string ("type_changed", "true");
 	  else
-	    ui_out_field_string (uiout, "type_changed", "false");
+	    uiout->field_string ("type_changed", "false");
 	}
 
       if (r->type_changed)
 	{
 	  std::string type_name = varobj_get_type (r->varobj);
 
-	  ui_out_field_string (uiout, "new_type", type_name.c_str ());
+	  uiout->field_string ("new_type", type_name.c_str ());
 	}
 
       if (r->type_changed || r->children_changed)
-	ui_out_field_int (uiout, "new_num_children", 
+	uiout->field_int ("new_num_children",
 			  varobj_get_num_children (r->varobj));
 
       gdb::unique_xmalloc_ptr<char> display_hint
 	= varobj_get_display_hint (r->varobj);
       if (display_hint)
-	ui_out_field_string (uiout, "displayhint", display_hint.get ());
+	uiout->field_string ("displayhint", display_hint.get ());
 
       if (varobj_is_dynamic_p (r->varobj))
-	ui_out_field_int (uiout, "dynamic", 1);
+	uiout->field_int ("dynamic", 1);
 
       varobj_get_child_range (r->varobj, &from, &to);
-      ui_out_field_int (uiout, "has_more",
-			varobj_has_more (r->varobj, to));
+      uiout->field_int ("has_more", varobj_has_more (r->varobj, to));
 
       if (r->newobj)
 	{
diff --git a/gdb/mi/mi-interp.c b/gdb/mi/mi-interp.c
index 72d63d0a05..07b2a82953 100644
--- a/gdb/mi/mi-interp.c
+++ b/gdb/mi/mi-interp.c
@@ -107,7 +107,7 @@ display_mi_prompt (struct mi_interp *mi)
 static struct mi_interp *
 as_mi_interp (struct interp *interp)
 {
-  if (ui_out_is_mi_like_p (interp_ui_out (interp)))
+  if (interp_ui_out (interp)->is_mi_like_p ())
     return (struct mi_interp *) interp_data (interp);
   return NULL;
 }
@@ -674,8 +674,7 @@ mi_on_normal_stop_1 (struct bpstats *bs, int print_frame)
 	  enum async_reply_reason reason;
 
 	  reason = thread_fsm_async_reply_reason (tp->thread_fsm);
-	  ui_out_field_string (mi_uiout, "reason",
-			       async_reason_lookup (reason));
+	  mi_uiout->field_string ("reason", async_reason_lookup (reason));
 	}
       print_stop_event (mi_uiout);
 
@@ -683,21 +682,21 @@ mi_on_normal_stop_1 (struct bpstats *bs, int print_frame)
       if (should_print_stop_to_console (console_interp, tp))
 	print_stop_event (mi->cli_uiout);
 
-      ui_out_field_int (mi_uiout, "thread-id", tp->global_num);
+      mi_uiout->field_int ("thread-id", tp->global_num);
       if (non_stop)
 	{
 	  struct cleanup *back_to = make_cleanup_ui_out_list_begin_end 
 	    (mi_uiout, "stopped-threads");
 
-	  ui_out_field_int (mi_uiout, NULL, tp->global_num);
+	  mi_uiout->field_int (NULL, tp->global_num);
 	  do_cleanups (back_to);
 	}
       else
-	ui_out_field_string (mi_uiout, "stopped-threads", "all");
+	mi_uiout->field_string ("stopped-threads", "all");
 
       core = target_core_of_thread (inferior_ptid);
       if (core != -1)
-	ui_out_field_int (mi_uiout, "core", core);
+	mi_uiout->field_int ("core", core);
     }
   
   fputs_unfiltered ("*stopped", mi->raw_stdout);
@@ -855,15 +854,15 @@ mi_tsv_modified (const struct trace_state_variable *tsv)
       fprintf_unfiltered (mi->event_channel,
 			  "tsv-modified");
 
-      ui_out_redirect (mi_uiout, mi->event_channel);
+      mi_uiout->redirect (mi->event_channel);
 
-      ui_out_field_string (mi_uiout, "name", tsv->name);
-      ui_out_field_string (mi_uiout, "initial",
+      mi_uiout->field_string ("name", tsv->name);
+      mi_uiout->field_string ("initial",
 			   plongest (tsv->initial_value));
       if (tsv->value_known)
-	ui_out_field_string (mi_uiout, "current", plongest (tsv->value));
+	mi_uiout->field_string ("current", plongest (tsv->value));
 
-      ui_out_redirect (mi_uiout, NULL);
+      mi_uiout->redirect (NULL);
 
       gdb_flush (mi->event_channel);
 
@@ -905,7 +904,7 @@ mi_breakpoint_created (struct breakpoint *b)
 	 break if anything is output to mi_uiout prior to calling the
 	 breakpoint_created notifications.  So, we use
 	 ui_out_redirect.  */
-      ui_out_redirect (mi_uiout, mi->event_channel);
+      mi_uiout->redirect (mi->event_channel);
       TRY
 	{
 	  gdb_breakpoint_query (mi_uiout, b->number, NULL);
@@ -915,7 +914,7 @@ mi_breakpoint_created (struct breakpoint *b)
 	}
       END_CATCH
 
-      ui_out_redirect (mi_uiout, NULL);
+      mi_uiout->redirect (NULL);
 
       gdb_flush (mi->event_channel);
 
@@ -984,7 +983,7 @@ mi_breakpoint_modified (struct breakpoint *b)
 	 break if anything is output to mi_uiout prior to calling the
 	 breakpoint_created notifications.  So, we use
 	 ui_out_redirect.  */
-      ui_out_redirect (mi->mi_uiout, mi->event_channel);
+      mi->mi_uiout->redirect (mi->event_channel);
       TRY
 	{
 	  gdb_breakpoint_query (mi->mi_uiout, b->number, NULL);
@@ -994,7 +993,7 @@ mi_breakpoint_modified (struct breakpoint *b)
 	}
       END_CATCH
 
-      ui_out_redirect (mi->mi_uiout, NULL);
+      mi->mi_uiout->redirect (NULL);
 
       gdb_flush (mi->event_channel);
 
@@ -1139,19 +1138,18 @@ mi_solib_loaded (struct so_list *solib)
 
       fprintf_unfiltered (mi->event_channel, "library-loaded");
 
-      ui_out_redirect (uiout, mi->event_channel);
+      uiout->redirect (mi->event_channel);
 
-      ui_out_field_string (uiout, "id", solib->so_original_name);
-      ui_out_field_string (uiout, "target-name", solib->so_original_name);
-      ui_out_field_string (uiout, "host-name", solib->so_name);
-      ui_out_field_int (uiout, "symbols-loaded", solib->symbols_loaded);
+      uiout->field_string ("id", solib->so_original_name);
+      uiout->field_string ("target-name", solib->so_original_name);
+      uiout->field_string ("host-name", solib->so_name);
+      uiout->field_int ("symbols-loaded", solib->symbols_loaded);
       if (!gdbarch_has_global_solist (target_gdbarch ()))
 	{
-	  ui_out_field_fmt (uiout, "thread-group", "i%d",
-			    current_inferior ()->num);
+	  uiout->field_fmt ("thread-group", "i%d", current_inferior ()->num);
 	}
 
-      ui_out_redirect (uiout, NULL);
+      uiout->redirect (NULL);
 
       gdb_flush (mi->event_channel);
 
@@ -1178,18 +1176,17 @@ mi_solib_unloaded (struct so_list *solib)
 
       fprintf_unfiltered (mi->event_channel, "library-unloaded");
 
-      ui_out_redirect (uiout, mi->event_channel);
+      uiout->redirect (mi->event_channel);
 
-      ui_out_field_string (uiout, "id", solib->so_original_name);
-      ui_out_field_string (uiout, "target-name", solib->so_original_name);
-      ui_out_field_string (uiout, "host-name", solib->so_name);
+      uiout->field_string ("id", solib->so_original_name);
+      uiout->field_string ("target-name", solib->so_original_name);
+      uiout->field_string ("host-name", solib->so_name);
       if (!gdbarch_has_global_solist (target_gdbarch ()))
 	{
-	  ui_out_field_fmt (uiout, "thread-group", "i%d",
-			    current_inferior ()->num);
+	  uiout->field_fmt ("thread-group", "i%d", current_inferior ()->num);
 	}
 
-      ui_out_redirect (uiout, NULL);
+      uiout->redirect (NULL);
 
       gdb_flush (mi->event_channel);
 
@@ -1221,12 +1218,12 @@ mi_command_param_changed (const char *param, const char *value)
 
       fprintf_unfiltered (mi->event_channel, "cmd-param-changed");
 
-      ui_out_redirect (mi_uiout, mi->event_channel);
+      mi_uiout->redirect (mi->event_channel);
 
-      ui_out_field_string (mi_uiout, "param", param);
-      ui_out_field_string (mi_uiout, "value", value);
+      mi_uiout->field_string ("param", param);
+      mi_uiout->field_string ("value", value);
 
-      ui_out_redirect (mi_uiout, NULL);
+      mi_uiout->redirect (NULL);
 
       gdb_flush (mi->event_channel);
 
@@ -1260,11 +1257,11 @@ mi_memory_changed (struct inferior *inferior, CORE_ADDR memaddr,
 
       fprintf_unfiltered (mi->event_channel, "memory-changed");
 
-      ui_out_redirect (mi_uiout, mi->event_channel);
+      mi_uiout->redirect (mi->event_channel);
 
-      ui_out_field_fmt (mi_uiout, "thread-group", "i%d", inferior->num);
-      ui_out_field_core_addr (mi_uiout, "addr", target_gdbarch (), memaddr);
-      ui_out_field_fmt (mi_uiout, "len", "%s", hex_string (len));
+      mi_uiout->field_fmt ("thread-group", "i%d", inferior->num);
+      mi_uiout->field_core_addr ("addr", target_gdbarch (), memaddr);
+      mi_uiout->field_fmt ("len", "%s", hex_string (len));
 
       /* Append 'type=code' into notification if MEMADDR falls in the range of
 	 sections contain code.  */
@@ -1275,10 +1272,10 @@ mi_memory_changed (struct inferior *inferior, CORE_ADDR memaddr,
 						  sec->the_bfd_section);
 
 	  if (flags & SEC_CODE)
-	    ui_out_field_string (mi_uiout, "type", "code");
+	    mi_uiout->field_string ("type", "code");
 	}
 
-      ui_out_redirect (mi_uiout, NULL);
+      mi_uiout->redirect (NULL);
 
       gdb_flush (mi->event_channel);
 
@@ -1311,7 +1308,7 @@ mi_user_selected_context_changed (user_selected_what selection)
 
       mi_uiout = interp_ui_out (top_level_interpreter ());
 
-      ui_out_redirect (mi_uiout, mi->event_channel);
+      mi_uiout->redirect (mi->event_channel);
 
       old_chain = make_cleanup_ui_out_redirect_pop (mi_uiout);
 
diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index 4d276c867d..ace9ff76b6 100644
--- a/gdb/mi/mi-main.c
+++ b/gdb/mi/mi-main.c
@@ -665,17 +665,17 @@ print_one_inferior (struct inferior *inferior, void *xdata)
       struct cleanup *back_to
 	= make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 
-      ui_out_field_fmt (uiout, "id", "i%d", inferior->num);
-      ui_out_field_string (uiout, "type", "process");
+      uiout->field_fmt ("id", "i%d", inferior->num);
+      uiout->field_string ("type", "process");
       if (inferior->has_exit_code)
-	ui_out_field_string (uiout, "exit-code",
+	uiout->field_string ("exit-code",
 			     int_string (inferior->exit_code, 8, 0, 0, 1));
       if (inferior->pid != 0)
-	ui_out_field_int (uiout, "pid", inferior->pid);
+	uiout->field_int ("pid", inferior->pid);
 
       if (inferior->pspace->pspace_exec_filename != NULL)
 	{
-	  ui_out_field_string (uiout, "executable",
+	  uiout->field_string ("executable",
 			       inferior->pspace->pspace_exec_filename);
 	}
 
@@ -701,7 +701,7 @@ print_one_inferior (struct inferior *inferior, void *xdata)
 	  e = unique (b, e);
 
 	  for (; b != e; ++b)
-	    ui_out_field_int (uiout, NULL, *b);
+	    uiout->field_int (NULL, *b);
 
 	  do_cleanups (back_to_2);
 	}
@@ -730,7 +730,7 @@ output_cores (struct ui_out *uiout, const char *field_name, const char *xcores)
   make_cleanup (xfree, cores);
 
   for (p = strtok (p, ","); p;  p = strtok (NULL, ","))
-    ui_out_field_string (uiout, NULL, p);
+    uiout->field_string (NULL, p);
 
   do_cleanups (back_to);
 }
@@ -853,12 +853,12 @@ list_available_thread_groups (VEC (int) *ids, int recurse)
 
       back_to = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 
-      ui_out_field_fmt (uiout, "id", "%s", pid);
-      ui_out_field_string (uiout, "type", "process");
+      uiout->field_fmt ("id", "%s", pid);
+      uiout->field_string ("type", "process");
       if (cmd)
-	ui_out_field_string (uiout, "description", cmd);
+	uiout->field_string ("description", cmd);
       if (user)
-	ui_out_field_string (uiout, "user", user);
+	uiout->field_string ("user", user);
       if (cores)
 	output_cores (uiout, "cores", cores);
 
@@ -882,9 +882,9 @@ list_available_thread_groups (VEC (int) *ids, int recurse)
 		  const char *tid = get_osdata_column (child, "tid");
 		  const char *tcore = get_osdata_column (child, "core");
 
-		  ui_out_field_string (uiout, "id", tid);
+		  uiout->field_string ("id", tid);
 		  if (tcore)
-		    ui_out_field_string (uiout, "core", tcore);
+		    uiout->field_string ("core", tcore);
 
 		  do_cleanups (back_to_2);
 		}
@@ -1028,10 +1028,9 @@ mi_cmd_data_list_register_names (char *command, char **argv, int argc)
 	{
 	  if (gdbarch_register_name (gdbarch, regnum) == NULL
 	      || *(gdbarch_register_name (gdbarch, regnum)) == '\0')
-	    ui_out_field_string (uiout, NULL, "");
+	    uiout->field_string (NULL, "");
 	  else
-	    ui_out_field_string (uiout, NULL,
-				 gdbarch_register_name (gdbarch, regnum));
+	    uiout->field_string (NULL, gdbarch_register_name (gdbarch, regnum));
 	}
     }
 
@@ -1044,10 +1043,9 @@ mi_cmd_data_list_register_names (char *command, char **argv, int argc)
 
       if (gdbarch_register_name (gdbarch, regnum) == NULL
 	  || *(gdbarch_register_name (gdbarch, regnum)) == '\0')
-	ui_out_field_string (uiout, NULL, "");
+	uiout->field_string (NULL, "");
       else
-	ui_out_field_string (uiout, NULL,
-			     gdbarch_register_name (gdbarch, regnum));
+	uiout->field_string (NULL, gdbarch_register_name (gdbarch, regnum));
     }
   do_cleanups (cleanup);
 }
@@ -1099,7 +1097,7 @@ mi_cmd_data_list_changed_registers (char *command, char **argv, int argc)
 	    error (_("-data-list-changed-registers: "
 		     "Unable to read register contents."));
 	  else if (changed)
-	    ui_out_field_int (uiout, NULL, regnum);
+	    uiout->field_int (NULL, regnum);
 	}
     }
 
@@ -1118,7 +1116,7 @@ mi_cmd_data_list_changed_registers (char *command, char **argv, int argc)
 	    error (_("-data-list-changed-registers: "
 		     "Unable to read register contents."));
 	  else if (changed)
-	    ui_out_field_int (uiout, NULL, regnum);
+	    uiout->field_int (NULL, regnum);
 	}
       else
 	error (_("bad register number"));
@@ -1269,7 +1267,7 @@ output_register (struct frame_info *frame, int regnum, int format,
     return;
 
   tuple_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-  ui_out_field_int (uiout, "number", regnum);
+  uiout->field_int ("number", regnum);
 
   if (format == 'N')
     format = 0;
@@ -1285,7 +1283,7 @@ output_register (struct frame_info *frame, int regnum, int format,
   val_print (value_type (val),
 	     value_embedded_offset (val), 0,
 	     stb, 0, val, &opts, current_language);
-  ui_out_field_stream (uiout, "value", stb);
+  uiout->field_stream ("value", stb);
 
   do_cleanups (tuple_cleanup);
 }
@@ -1376,7 +1374,7 @@ mi_cmd_data_evaluate_expression (char *command, char **argv, int argc)
   opts.deref_ref = 0;
   common_val_print (val, stb, 0, &opts, current_language);
 
-  ui_out_field_stream (uiout, "value", stb);
+  uiout->field_stream ("value", stb);
 
   do_cleanups (old_chain);
 }
@@ -1508,15 +1506,13 @@ mi_cmd_data_read_memory (char *command, char **argv, int argc)
     error (_("Unable to read memory."));
 
   /* Output the header information.  */
-  ui_out_field_core_addr (uiout, "addr", gdbarch, addr);
-  ui_out_field_int (uiout, "nr-bytes", nr_bytes);
-  ui_out_field_int (uiout, "total-bytes", total_bytes);
-  ui_out_field_core_addr (uiout, "next-row",
-			  gdbarch, addr + word_size * nr_cols);
-  ui_out_field_core_addr (uiout, "prev-row",
-			  gdbarch, addr - word_size * nr_cols);
-  ui_out_field_core_addr (uiout, "next-page", gdbarch, addr + total_bytes);
-  ui_out_field_core_addr (uiout, "prev-page", gdbarch, addr - total_bytes);
+  uiout->field_core_addr ("addr", gdbarch, addr);
+  uiout->field_int ("nr-bytes", nr_bytes);
+  uiout->field_int ("total-bytes", total_bytes);
+  uiout->field_core_addr ("next-row", gdbarch, addr + word_size * nr_cols);
+  uiout->field_core_addr ("prev-row", gdbarch, addr - word_size * nr_cols);
+  uiout->field_core_addr ("next-page", gdbarch, addr + total_bytes);
+  uiout->field_core_addr ("prev-page", gdbarch, addr - total_bytes);
 
   /* Build the result as a two dimentional table.  */
   {
@@ -1540,7 +1536,7 @@ mi_cmd_data_read_memory (char *command, char **argv, int argc)
 	struct value_print_options opts;
 
 	cleanup_tuple = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-	ui_out_field_core_addr (uiout, "addr", gdbarch, addr + row_byte);
+	uiout->field_core_addr ("addr", gdbarch, addr + row_byte);
 	/* ui_out_field_core_addr_symbolic (uiout, "saddr", addr +
 	   row_byte); */
 	cleanup_list_data = make_cleanup_ui_out_list_begin_end (uiout, "data");
@@ -1551,14 +1547,14 @@ mi_cmd_data_read_memory (char *command, char **argv, int argc)
 	  {
 	    if (col_byte + word_size > nr_bytes)
 	      {
-		ui_out_field_string (uiout, NULL, "N/A");
+		uiout->field_string (NULL, "N/A");
 	      }
 	    else
 	      {
 		ui_file_rewind (stream);
 		print_scalar_formatted (&mbuf[col_byte], word_type, &opts,
 					word_asize, stream);
-		ui_out_field_stream (uiout, NULL, stream);
+		uiout->field_stream (NULL, stream);
 	      }
 	  }
 	do_cleanups (cleanup_list_data);
@@ -1577,7 +1573,7 @@ mi_cmd_data_read_memory (char *command, char **argv, int argc)
 		else
 		  fputc_unfiltered (mbuf[byte], stream);
 	      }
-	    ui_out_field_stream (uiout, "ascii", stream);
+	    uiout->field_stream ("ascii", stream);
 	  }
 	do_cleanups (cleanup_tuple);
       }
@@ -1649,10 +1645,9 @@ mi_cmd_data_read_memory_bytes (char *command, char **argv, int argc)
       int i;
       int alloc_len;
 
-      ui_out_field_core_addr (uiout, "begin", gdbarch, read_result->begin);
-      ui_out_field_core_addr (uiout, "offset", gdbarch, read_result->begin
-			      - addr);
-      ui_out_field_core_addr (uiout, "end", gdbarch, read_result->end);
+      uiout->field_core_addr ("begin", gdbarch, read_result->begin);
+      uiout->field_core_addr ("offset", gdbarch, read_result->begin - addr);
+      uiout->field_core_addr ("end", gdbarch, read_result->end);
 
       alloc_len = (read_result->end - read_result->begin) * 2 * unit_size + 1;
       data = (char *) xmalloc (alloc_len);
@@ -1663,7 +1658,7 @@ mi_cmd_data_read_memory_bytes (char *command, char **argv, int argc)
 	{
 	  sprintf (p, "%02x", read_result->data[i]);
 	}
-      ui_out_field_string (uiout, "contents", data);
+      uiout->field_string ("contents", data);
       xfree (data);
       do_cleanups (t);
     }
@@ -1866,19 +1861,19 @@ mi_cmd_list_features (char *command, char **argv, int argc)
       struct ui_out *uiout = current_uiout;
 
       cleanup = make_cleanup_ui_out_list_begin_end (uiout, "features");
-      ui_out_field_string (uiout, NULL, "frozen-varobjs");
-      ui_out_field_string (uiout, NULL, "pending-breakpoints");
-      ui_out_field_string (uiout, NULL, "thread-info");
-      ui_out_field_string (uiout, NULL, "data-read-memory-bytes");
-      ui_out_field_string (uiout, NULL, "breakpoint-notifications");
-      ui_out_field_string (uiout, NULL, "ada-task-info");
-      ui_out_field_string (uiout, NULL, "language-option");
-      ui_out_field_string (uiout, NULL, "info-gdb-mi-command");
-      ui_out_field_string (uiout, NULL, "undefined-command-error-code");
-      ui_out_field_string (uiout, NULL, "exec-run-start-option");
+      uiout->field_string (NULL, "frozen-varobjs");
+      uiout->field_string (NULL, "pending-breakpoints");
+      uiout->field_string (NULL, "thread-info");
+      uiout->field_string (NULL, "data-read-memory-bytes");
+      uiout->field_string (NULL, "breakpoint-notifications");
+      uiout->field_string (NULL, "ada-task-info");
+      uiout->field_string (NULL, "language-option");
+      uiout->field_string (NULL, "info-gdb-mi-command");
+      uiout->field_string (NULL, "undefined-command-error-code");
+      uiout->field_string (NULL, "exec-run-start-option");
 
       if (ext_lang_initialized_p (get_ext_lang_defn (EXT_LANG_PYTHON)))
-	ui_out_field_string (uiout, NULL, "python");
+	uiout->field_string (NULL, "python");
 
       do_cleanups (cleanup);
       return;
@@ -1897,9 +1892,9 @@ mi_cmd_list_target_features (char *command, char **argv, int argc)
 
       cleanup = make_cleanup_ui_out_list_begin_end (uiout, "features");
       if (mi_async_p ())
-	ui_out_field_string (uiout, NULL, "async");
+	uiout->field_string (NULL, "async");
       if (target_can_execute_reverse)
-	ui_out_field_string (uiout, NULL, "reverse");
+	uiout->field_string (NULL, "reverse");
       do_cleanups (cleanup);
       return;
     }
@@ -1917,7 +1912,7 @@ mi_cmd_add_inferior (char *command, char **argv, int argc)
 
   inf = add_inferior_with_spaces ();
 
-  ui_out_field_fmt (current_uiout, "inferior", "i%d", inf->num);
+  current_uiout->field_fmt ("inferior", "i%d", inf->num);
 }
 
 /* Callback used to find the first inferior other than the current
@@ -2190,7 +2185,7 @@ mi_execute_command (const char *cmd, int from_tty)
 
       if (/* The notifications are only output when the top-level
 	     interpreter (specified on the command line) is MI.  */
-	  ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ()))
+	  interp_ui_out (top_level_interpreter ())->is_mi_like_p ()
 	  /* Don't try report anything if there are no threads --
 	     the program is dead.  */
 	  && thread_count () != 0
@@ -2422,9 +2417,9 @@ mi_load_progress (const char *section_name,
 	fputs_unfiltered (current_token, mi->raw_stdout);
       fputs_unfiltered ("+download", mi->raw_stdout);
       cleanup_tuple = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-      ui_out_field_string (uiout, "section", section_name);
-      ui_out_field_int (uiout, "section-size", total_section);
-      ui_out_field_int (uiout, "total-size", grand_total);
+      uiout->field_string ("section", section_name);
+      uiout->field_int ("section-size", total_section);
+      uiout->field_int ("total-size", grand_total);
       do_cleanups (cleanup_tuple);
       mi_out_put (uiout, mi->raw_stdout);
       fputs_unfiltered ("\n", mi->raw_stdout);
@@ -2441,11 +2436,11 @@ mi_load_progress (const char *section_name,
 	fputs_unfiltered (current_token, mi->raw_stdout);
       fputs_unfiltered ("+download", mi->raw_stdout);
       cleanup_tuple = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-      ui_out_field_string (uiout, "section", section_name);
-      ui_out_field_int (uiout, "section-sent", sent_so_far);
-      ui_out_field_int (uiout, "section-size", total_section);
-      ui_out_field_int (uiout, "total-sent", total_sent);
-      ui_out_field_int (uiout, "total-size", grand_total);
+      uiout->field_string ("section", section_name);
+      uiout->field_int ("section-sent", sent_so_far);
+      uiout->field_int ("section-size", total_section);
+      uiout->field_int ("total-sent", total_sent);
+      uiout->field_int ("total-size", grand_total);
       do_cleanups (cleanup_tuple);
       mi_out_put (uiout, mi->raw_stdout);
       fputs_unfiltered ("\n", mi->raw_stdout);
@@ -2720,14 +2715,14 @@ print_variable_or_computed (const char *expression, enum print_values values)
 
   if (values != PRINT_NO_VALUES)
     make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-  ui_out_field_string (uiout, "name", expression);
+  uiout->field_string ("name", expression);
 
   switch (values)
     {
     case PRINT_SIMPLE_VALUES:
       type = check_typedef (value_type (val));
       type_print (value_type (val), "", stb, -1);
-      ui_out_field_stream (uiout, "type", stb);
+      uiout->field_stream ("type", stb);
       if (TYPE_CODE (type) != TYPE_CODE_ARRAY
 	  && TYPE_CODE (type) != TYPE_CODE_STRUCT
 	  && TYPE_CODE (type) != TYPE_CODE_UNION)
@@ -2737,7 +2732,7 @@ print_variable_or_computed (const char *expression, enum print_values values)
 	  get_no_prettyformat_print_options (&opts);
 	  opts.deref_ref = 1;
 	  common_val_print (val, stb, 0, &opts, current_language);
-	  ui_out_field_stream (uiout, "value", stb);
+	  uiout->field_stream ("value", stb);
 	}
       break;
     case PRINT_ALL_VALUES:
@@ -2747,7 +2742,7 @@ print_variable_or_computed (const char *expression, enum print_values values)
 	get_no_prettyformat_print_options (&opts);
 	opts.deref_ref = 1;
 	common_val_print (val, stb, 0, &opts, current_language);
-	ui_out_field_stream (uiout, "value", stb);
+	uiout->field_stream ("value", stb);
       }
       break;
     }
@@ -2929,16 +2924,16 @@ mi_cmd_trace_frame_collected (char *command, char **argv, int argc)
 	    tsvname = (char *) xrealloc (tsvname, strlen (tsv->name) + 2);
 	    tsvname[0] = '$';
 	    strcpy (tsvname + 1, tsv->name);
-	    ui_out_field_string (uiout, "name", tsvname);
+	    uiout->field_string ("name", tsvname);
 
 	    tsv->value_known = target_get_trace_state_variable_value (tsv->number,
 								      &tsv->value);
-	    ui_out_field_int (uiout, "current", tsv->value);
+	    uiout->field_int ("current", tsv->value);
 	  }
 	else
 	  {
-	    ui_out_field_skip (uiout, "name");
-	    ui_out_field_skip (uiout, "current");
+	    uiout->field_skip ("name");
+	    uiout->field_skip ("current");
 	  }
 
 	do_cleanups (cleanup_child);
@@ -2967,8 +2962,8 @@ mi_cmd_trace_frame_collected (char *command, char **argv, int argc)
 
 	cleanup_child = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 
-	ui_out_field_core_addr (uiout, "address", gdbarch, r->start);
-	ui_out_field_int (uiout, "length", r->length);
+	uiout->field_core_addr ("address", gdbarch, r->start);
+	uiout->field_int ("length", r->length);
 
 	data = (gdb_byte *) xmalloc (r->length);
 	make_cleanup (xfree, data);
@@ -2985,10 +2980,10 @@ mi_cmd_trace_frame_collected (char *command, char **argv, int argc)
 
 		for (m = 0, p = data_str; m < r->length; ++m, p += 2)
 		  sprintf (p, "%02x", data[m]);
-		ui_out_field_string (uiout, "contents", data_str);
+		uiout->field_string ("contents", data_str);
 	      }
 	    else
-	      ui_out_field_skip (uiout, "contents");
+	      uiout->field_skip ("contents");
 	  }
 	do_cleanups (cleanup_child);
       }
diff --git a/gdb/mi/mi-out.c b/gdb/mi/mi-out.c
index 19fcf87fbf..3761a5c0e5 100644
--- a/gdb/mi/mi-out.c
+++ b/gdb/mi/mi-out.c
@@ -24,169 +24,85 @@
 #include "mi-out.h"
 #include <vector>
 
-struct mi_ui_out_data
-  {
-    int suppress_field_separator;
-    int mi_version;
-    std::vector<ui_file *> streams;
-  };
-typedef struct mi_ui_out_data mi_out_data;
-
-/* These are the MI output functions */
-
-static void mi_out_data_dtor (struct ui_out *ui_out);
-static void mi_table_begin (struct ui_out *uiout, int nbrofcols,
-			    int nr_rows, const char *tblid);
-static void mi_table_body (struct ui_out *uiout);
-static void mi_table_end (struct ui_out *uiout);
-static void mi_table_header (struct ui_out *uiout, int width,
-			     enum ui_align alignment,
-			     const std::string &col_name,
-			     const std::string &col_hdr);
-static void mi_begin (struct ui_out *uiout, enum ui_out_type type,
-		      const char *id);
-static void mi_end (struct ui_out *uiout, enum ui_out_type type);
-static void mi_field_int (struct ui_out *uiout, int fldno, int width,
-			  enum ui_align alig, const char *fldname, int value);
-static void mi_field_skip (struct ui_out *uiout, int fldno, int width,
-			   enum ui_align alig, const char *fldname);
-static void mi_field_string (struct ui_out *uiout, int fldno, int width,
-			     enum ui_align alig, const char *fldname,
-			     const char *string);
-static void mi_field_fmt (struct ui_out *uiout, int fldno,
-			  int width, enum ui_align align,
-			  const char *fldname, const char *format,
-			  va_list args) ATTRIBUTE_PRINTF (6, 0);
-static void mi_spaces (struct ui_out *uiout, int numspaces);
-static void mi_text (struct ui_out *uiout, const char *string);
-static void mi_message (struct ui_out *uiout, const char *format, va_list args)
-     ATTRIBUTE_PRINTF (2, 0);
-static void mi_wrap_hint (struct ui_out *uiout, const char *identstring);
-static void mi_flush (struct ui_out *uiout);
-static int mi_redirect (struct ui_out *uiout, struct ui_file *outstream);
-
-/* This is the MI ui-out implementation functions vector */
-
-static const struct ui_out_impl mi_ui_out_impl =
-{
-  mi_table_begin,
-  mi_table_body,
-  mi_table_end,
-  mi_table_header,
-  mi_begin,
-  mi_end,
-  mi_field_int,
-  mi_field_skip,
-  mi_field_string,
-  mi_field_fmt,
-  mi_spaces,
-  mi_text,
-  mi_message,
-  mi_wrap_hint,
-  mi_flush,
-  mi_redirect,
-  mi_out_data_dtor,
-  1, /* Needs MI hacks.  */
-};
-
-/* Prototypes for local functions */
-
-static void field_separator (struct ui_out *uiout);
-static void mi_open (struct ui_out *uiout, const char *name,
-		     enum ui_out_type type);
-static void mi_close (struct ui_out *uiout, enum ui_out_type type);
-
 /* Mark beginning of a table.  */
 
 void
-mi_table_begin (struct ui_out *uiout,
-		int nr_cols,
-		int nr_rows,
-		const char *tblid)
+mi_ui_out::do_table_begin (int nr_cols, int nr_rows,
+			   const char *tblid)
 {
-  mi_open (uiout, tblid, ui_out_type_tuple);
-  mi_field_int (uiout, -1, -1, ui_left, "nr_rows", nr_rows);
-  mi_field_int (uiout, -1, -1, ui_left, "nr_cols", nr_cols);
-  mi_open (uiout, "hdr", ui_out_type_list);
+  open (tblid, ui_out_type_tuple);
+  do_field_int (-1, -1, ui_left, "nr_rows", nr_rows);
+  do_field_int (-1, -1, ui_left, "nr_cols", nr_cols);
+  open ("hdr", ui_out_type_list);
 }
 
 /* Mark beginning of a table body.  */
 
 void
-mi_table_body (struct ui_out *uiout)
+mi_ui_out::do_table_body ()
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-
   /* close the table header line if there were any headers */
-  mi_close (uiout, ui_out_type_list);
-  mi_open (uiout, "body", ui_out_type_list);
+  close (ui_out_type_list);
+  open ("body", ui_out_type_list);
 }
 
 /* Mark end of a table.  */
 
 void
-mi_table_end (struct ui_out *uiout)
+mi_ui_out::do_table_end ()
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-
-  mi_close (uiout, ui_out_type_list); /* body */
-  mi_close (uiout, ui_out_type_tuple);
+  close (ui_out_type_list); /* body */
+  close (ui_out_type_tuple);
 }
 
 /* Specify table header.  */
 
 void
-mi_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
-		 const std::string &col_name, const std::string &col_hdr)
+mi_ui_out::do_table_header (int width, ui_align alignment,
+			    const std::string &col_name,
+			    const std::string &col_hdr)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-
-  mi_open (uiout, NULL, ui_out_type_tuple);
-  mi_field_int (uiout, 0, 0, ui_center, "width", width);
-  mi_field_int (uiout, 0, 0, ui_center, "alignment", alignment);
-  mi_field_string (uiout, 0, 0, ui_center, "col_name", col_name.c_str ());
-  mi_field_string (uiout, 0, width, alignment, "colhdr", col_hdr.c_str ());
-  mi_close (uiout, ui_out_type_tuple);
+  open (NULL, ui_out_type_tuple);
+  do_field_int (0, 0, ui_center, "width", width);
+  do_field_int (0, 0, ui_center, "alignment", alignment);
+  do_field_string (0, 0, ui_center, "col_name", col_name.c_str ());
+  do_field_string (0, width, alignment, "colhdr", col_hdr.c_str ());
+  close (ui_out_type_tuple);
 }
 
 /* Mark beginning of a list.  */
 
 void
-mi_begin (struct ui_out *uiout, enum ui_out_type type, const char *id)
+mi_ui_out::do_begin (ui_out_type type, const char *id)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-
-  mi_open (uiout, id, type);
+  open (id, type);
 }
 
 /* Mark end of a list.  */
 
 void
-mi_end (struct ui_out *uiout, enum ui_out_type type)
+mi_ui_out::do_end (ui_out_type type)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-
-  mi_close (uiout, type);
+  close (type);
 }
 
 /* Output an int field.  */
 
-static void
-mi_field_int (struct ui_out *uiout, int fldno, int width,
-              enum ui_align alignment, const char *fldname, int value)
+void
+mi_ui_out::do_field_int (int fldno, int width, ui_align alignment,
+			 const char *fldname, int value)
 {
   char buffer[20];	/* FIXME: how many chars long a %d can become? */
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
 
   xsnprintf (buffer, sizeof (buffer), "%d", value);
-  mi_field_string (uiout, fldno, width, alignment, fldname, buffer);
+  do_field_string (fldno, width, alignment, fldname, buffer);
 }
 
 /* Used to omit a field.  */
 
 void
-mi_field_skip (struct ui_out *uiout, int fldno, int width,
-               enum ui_align alignment, const char *fldname)
+mi_ui_out::do_field_skip (int fldno, int width, ui_align alignment,
+			  const char *fldname)
 {
 }
 
@@ -194,14 +110,12 @@ mi_field_skip (struct ui_out *uiout, int fldno, int width,
    separators are both handled by mi_field_string. */
 
 void
-mi_field_string (struct ui_out *uiout, int fldno, int width,
-		 enum ui_align align, const char *fldname, const char *string)
+mi_ui_out::do_field_string (int fldno, int width, ui_align align,
+			    const char *fldname, const char *string)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-  struct ui_file *stream;
+  ui_file *stream = m_streams.back ();
+  field_separator ();
 
-  stream = data->streams.back ();
-  field_separator (uiout);
   if (fldname)
     fprintf_unfiltered (stream, "%s=", fldname);
   fprintf_unfiltered (stream, "\"");
@@ -213,15 +127,13 @@ mi_field_string (struct ui_out *uiout, int fldno, int width,
 /* This is the only field function that does not align.  */
 
 void
-mi_field_fmt (struct ui_out *uiout, int fldno, int width,
-	      enum ui_align align, const char *fldname,
-	      const char *format, va_list args)
+mi_ui_out::do_field_fmt (int fldno, int width, ui_align align,
+			 const char *fldname, const char *format,
+			 va_list args)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-  struct ui_file *stream;
+  ui_file *stream = m_streams.back ();
+  field_separator ();
 
-  stream = data->streams.back ();
-  field_separator (uiout);
   if (fldname)
     fprintf_unfiltered (stream, "%s=\"", fldname);
   else
@@ -231,125 +143,115 @@ mi_field_fmt (struct ui_out *uiout, int fldno, int width,
 }
 
 void
-mi_spaces (struct ui_out *uiout, int numspaces)
+mi_ui_out::do_spaces (int numspaces)
 {
 }
 
 void
-mi_text (struct ui_out *uiout, const char *string)
+mi_ui_out::do_text (const char *string)
 {
 }
 
 void
-mi_message (struct ui_out *uiout, const char *format, va_list args)
+mi_ui_out::do_message (const char *format, va_list args)
 {
 }
 
 void
-mi_wrap_hint (struct ui_out *uiout, const char *identstring)
+mi_ui_out::do_wrap_hint (const char *identstring)
 {
   wrap_here (identstring);
 }
 
 void
-mi_flush (struct ui_out *uiout)
+mi_ui_out::do_flush ()
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-  struct ui_file *stream = data->streams.back ();
 
-  gdb_flush (stream);
+  gdb_flush (m_streams.back ());
 }
 
 int
-mi_redirect (struct ui_out *uiout, struct ui_file *outstream)
+mi_ui_out::do_redirect (ui_file *outstream)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-
   if (outstream != NULL)
-    data->streams.push_back (outstream);
+    m_streams.push_back (outstream);
   else
-    data->streams.pop_back ();
+    m_streams.pop_back ();
 
   return 0;
 }
 
-/* local functions */
-
-/* access to ui_out format private members */
-
-static void
-field_separator (struct ui_out *uiout)
+void
+mi_ui_out::field_separator ()
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-  ui_file *stream = data->streams.back ();
-
-  if (data->suppress_field_separator)
-    data->suppress_field_separator = 0;
+  if (m_suppress_field_separator)
+    m_suppress_field_separator = false;
   else
-    fputc_unfiltered (',', stream);
+    fputc_unfiltered (',', m_streams.back ());
 }
 
-static void
-mi_open (struct ui_out *uiout, const char *name, enum ui_out_type type)
+void
+mi_ui_out::open (const char *name, ui_out_type type)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-  ui_file *stream = data->streams.back ();
+  ui_file *stream = m_streams.back ();
+
+  field_separator ();
+  m_suppress_field_separator = true;
 
-  field_separator (uiout);
-  data->suppress_field_separator = 1;
   if (name)
     fprintf_unfiltered (stream, "%s=", name);
+
   switch (type)
     {
     case ui_out_type_tuple:
       fputc_unfiltered ('{', stream);
       break;
+
     case ui_out_type_list:
       fputc_unfiltered ('[', stream);
       break;
+
     default:
       internal_error (__FILE__, __LINE__, _("bad switch"));
     }
 }
 
-static void
-mi_close (struct ui_out *uiout, enum ui_out_type type)
+void
+mi_ui_out::close (ui_out_type type)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-  ui_file *stream = data->streams.back ();
+  ui_file *stream = m_streams.back ();
 
   switch (type)
     {
     case ui_out_type_tuple:
       fputc_unfiltered ('}', stream);
       break;
+
     case ui_out_type_list:
       fputc_unfiltered (']', stream);
       break;
+
     default:
       internal_error (__FILE__, __LINE__, _("bad switch"));
     }
-  data->suppress_field_separator = 0;
+
+  m_suppress_field_separator = false;
 }
 
 /* Clear the buffer.  */
 
 void
-mi_out_rewind (struct ui_out *uiout)
+mi_ui_out::rewind ()
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-  ui_file *stream = data->streams.back ();
-
-  ui_file_rewind (stream);
+  ui_file_rewind (m_streams.back ());
 }
 
 /* Dump the buffer onto the specified stream.  */
 
 void
-mi_out_put (struct ui_out *uiout, struct ui_file *stream)
+mi_ui_out::put (ui_file *stream)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-  ui_file *outstream = data->streams.back ();
+  ui_file *outstream = m_streams.back ();
 
   ui_file_put (outstream, ui_file_write_for_put, stream);
   ui_file_rewind (outstream);
@@ -358,45 +260,64 @@ mi_out_put (struct ui_out *uiout, struct ui_file *stream)
 /* Return the current MI version.  */
 
 int
-mi_version (struct ui_out *uiout)
+mi_ui_out::version ()
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (uiout);
-
-  return data->mi_version;
+  return m_mi_version;
 }
 
 /* Constructor for an `mi_out_data' object.  */
 
-static void
-mi_out_data_ctor (mi_out_data *self, int mi_version, struct ui_file *stream)
+mi_ui_out::mi_ui_out (int mi_version, ui_file *stream)
+: m_suppress_field_separator (false),
+  m_suppress_output (false),
+  m_mi_version (mi_version)
 {
   gdb_assert (stream != NULL);
 
-  self->streams.push_back (stream);
+  m_streams.push_back (stream);
+}
 
-  self->suppress_field_separator = 0;
-  self->mi_version = mi_version;
+mi_ui_out::~mi_ui_out ()
+{
 }
 
-/* The destructor.  */
+/* Initialize private members at startup.  */
 
-static void
-mi_out_data_dtor (struct ui_out *ui_out)
+mi_ui_out *
+mi_out_new (int mi_version)
 {
-  mi_out_data *data = (mi_out_data *) ui_out_data (ui_out);
+  ui_file *stream = mem_fileopen ();
 
-  delete data;
+  return new mi_ui_out (mi_version, stream);
 }
 
-/* Initialize private members at startup.  */
+/* Helper function to return the given UIOUT as an mi_ui_out.  It is an error
+   to call this function with an ui_out that is not an MI.  */
 
-struct ui_out *
-mi_out_new (int mi_version)
+static mi_ui_out *
+as_mi_ui_out (ui_out *uiout)
 {
-  ui_out_flags flags = 0;
-  mi_out_data *data = new mi_out_data ();
-  struct ui_file *stream = mem_fileopen ();
+  mi_ui_out *mi_uiout = dynamic_cast<mi_ui_out *> (uiout);
+
+  gdb_assert (mi_uiout != NULL);
+
+  return mi_uiout;
+}
 
-  mi_out_data_ctor (data, mi_version, stream);
-  return ui_out_new (&mi_ui_out_impl, data, flags);
+int
+mi_version (ui_out *uiout)
+{
+  return as_mi_ui_out (uiout)->version ();
+}
+
+void
+mi_out_put (ui_out *uiout, struct ui_file *stream)
+{
+  return as_mi_ui_out (uiout)->put (stream);
+}
+
+void
+mi_out_rewind (ui_out *uiout)
+{
+  return as_mi_ui_out (uiout)->rewind ();
 }
diff --git a/gdb/mi/mi-out.h b/gdb/mi/mi-out.h
index ba1895055a..933f1d0d98 100644
--- a/gdb/mi/mi-out.h
+++ b/gdb/mi/mi-out.h
@@ -20,14 +20,73 @@
 #ifndef MI_OUT_H
 #define MI_OUT_H 1
 
+#include <vector>
+
 struct ui_out;
 struct ui_file;
 
-extern struct ui_out *mi_out_new (int mi_version);
-extern void mi_out_put (struct ui_out *uiout, struct ui_file *stream);
-extern void mi_out_rewind (struct ui_out *uiout);
 
-/* Return the version number of the current MI.  */
-extern int mi_version (struct ui_out *uiout);
+class mi_ui_out : public ui_out
+{
+public:
+
+  explicit mi_ui_out (int mi_version, ui_file *stream);
+  virtual ~mi_ui_out ();
+
+  /* MI-specific */
+  void rewind ();
+  void put (struct ui_file *stream);
+
+  /* Return the version number of the current MI.  */
+  int version ();
+
+protected:
+
+  virtual void do_table_begin (int nbrofcols, int nr_rows, const char *tblid)
+    override;
+  virtual void do_table_body () override;
+  virtual void do_table_header (int width, ui_align align,
+			     const std::string &col_name,
+			     const std::string &col_hdr) override;
+  virtual void do_table_end () override;
+
+  virtual void do_begin (ui_out_type type, const char *id) override;
+  virtual void do_end (ui_out_type type) override;
+  virtual void do_field_int (int fldno, int width, ui_align align,
+			  const char *fldname, int value) override;
+  virtual void do_field_skip (int fldno, int width, ui_align align,
+			   const char *fldname) override;
+  virtual void do_field_string (int fldno, int width, ui_align align,
+			     const char *fldname, const char *string) override;
+  virtual 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);
+  virtual void do_spaces (int numspaces) override;
+  virtual void do_text (const char *string) override;
+  virtual void do_message (const char *format, va_list args) override
+    ATTRIBUTE_PRINTF (2,0);
+  virtual void do_wrap_hint (const char *identstring) override;
+  virtual void do_flush () override;
+  virtual int do_redirect (struct ui_file * outstream) override;
+
+  virtual bool do_is_mi_like_p () override
+  { return true; }
+
+private:
+
+  void field_separator ();
+  void open (const char *name, ui_out_type type);
+  void close (ui_out_type type);
+
+  bool m_suppress_field_separator;
+  bool m_suppress_output;
+  int m_mi_version;
+  std::vector<ui_file *> m_streams;
+};
+
+mi_ui_out *mi_out_new (int mi_version);
+int mi_version (ui_out *uiout);
+void mi_out_put (ui_out *uiout, struct ui_file *stream);
+void mi_out_rewind (ui_out *uiout);
 
 #endif /* MI_OUT_H */
diff --git a/gdb/mi/mi-symbol-cmds.c b/gdb/mi/mi-symbol-cmds.c
index 6236d66fe2..42d4902e44 100644
--- a/gdb/mi/mi-symbol-cmds.c
+++ b/gdb/mi/mi-symbol-cmds.c
@@ -56,9 +56,8 @@ mi_cmd_symbol_list_lines (char *command, char **argv, int argc)
     for (i = 0; i < SYMTAB_LINETABLE (s)->nitems; i++)
     {
       cleanup_tuple = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-      ui_out_field_core_addr (uiout, "pc", gdbarch,
-			      SYMTAB_LINETABLE (s)->item[i].pc);
-      ui_out_field_int (uiout, "line", SYMTAB_LINETABLE (s)->item[i].line);
+      uiout->field_core_addr ("pc", gdbarch, SYMTAB_LINETABLE (s)->item[i].pc);
+      uiout->field_int ("line", SYMTAB_LINETABLE (s)->item[i].line);
       do_cleanups (cleanup_tuple);
     }