[gdb/cli] Add a progress meter

Add a progress meter.  It's not used anywhere yet.

gdb/ChangeLog:

2020-12-16  Tom Tromey  <tom@tromey.com>
	    Tom Tromey  <tromey@redhat.com>
	    Tom de Vries  <tdevries@suse.de>

	* utils.h (get_chars_per_line): Declare.
	* utils.c (get_chars_per_line): New function.
	(fputs_maybe_filtered): Handle '\r'.
	* ui-out.h (ui_out::progress_meter): New class.
	(ui_out::progress, ui_out::do_progress_start)
	(ui_out::do_progress_notify, ui_out::do_progress_end): New
	methods.
	* ui-out.c (do_progress_end)
	(make_cleanup_ui_out_progress_begin_end, ui_out_progress): New
	functions.
	* mi/mi-out.h (mi_ui_out::do_progress_start)
	(mi_ui_out::do_progress_notify, mi_ui_out::do_progress_end): New
	methods.
	* cli-out.h (struct cli_ui_out) <do_progress_start,
	do_progress_notify, do_progress_end>: New methods.
	<enum meter_stat, struct cli_progress_info>: New.
	<m_meters>: New member.
	* cli-out.c (cli_ui_out::do_progress_start)
	(cli_ui_out::do_progress_notify, cli_ui_out::do_progress_end): New
	methods.

1 files changed, 14 insertions, 0 deletions

diff --git a/gdb/utils.c b/gdb/utils.c
index 3226656..abcf6e2 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -1579,6 +1579,14 @@ gdb_flush (struct ui_file *stream)
   stream->flush ();
 }
 
+/* See utils.h.  */
+
+int
+get_chars_per_line ()
+{
+  return chars_per_line;
+}
+
 /* Indicate that if the next sequence of characters overflows the line,
    a newline should be inserted here rather than when it hits the end.
    If INDENT is non-null, it is a string to be printed to indent the
@@ -1769,6 +1777,12 @@ fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream,
 		 don't increment chars_printed here.  */
 	      lineptr += skip_bytes;
 	    }
+	  else if (*lineptr == '\r')
+	    {
+	      wrap_buffer.push_back (*lineptr);
+	      chars_printed = 0;
+	      lineptr++;
+	    }
 	  else
 	    {
 	      wrap_buffer.push_back (*lineptr);