[PATCH 1/2] progress: add update_progress()

[sdaoden@googlemail.com]

From: Steffen Daode Nurpmeso <sdaoden@gmail.com>

Sometimes the task which is tracked via progress is splitted
into two parts, e.g. check_updates() in unpack_trees.c updates
the working tree by first removing files, followed by checking
out files.  Whereas it is possible to simply recreate a progress
reporter, it's easier to simply call in to update the state of
the yet existing one.

Inspired-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Steffen Daode Nurpmeso <sdaoden@gmail.com>
---
 progress.c |   15 +++++++++++++++
 progress.h |    2 ++
 2 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/progress.c b/progress.c
index 3971f49..c86f83f 100644
--- a/progress.c
+++ b/progress.c
@@ -234,6 +234,21 @@ struct progress *start_progress(const char *title, unsigned total)
 	return start_progress_delay(title, total, 0, 0);
 }
 
+void update_progress(struct progress *progress, const char *title,
+			unsigned total)
+{
+	if (!progress)
+		return;
+	progress->title = title;
+	progress->total = total;
+	progress->last_value = -1;
+	progress->last_percent = -1;
+	if (progress->delay < 0)
+		progress->delay = 0;
+	clear_progress_signal();
+	set_progress_signal();
+}
+
 void stop_progress(struct progress **p_progress)
 {
 	stop_progress_msg(p_progress, "done");
diff --git a/progress.h b/progress.h
index 611e4c4..eed5b58 100644
--- a/progress.h
+++ b/progress.h
@@ -8,6 +8,8 @@ int display_progress(struct progress *progress, unsigned n);
 struct progress *start_progress(const char *title, unsigned total);
 struct progress *start_progress_delay(const char *title, unsigned total,
 				       unsigned percent_treshold, unsigned delay);
+void update_progress(struct progress *progress, const char *title,
+			unsigned total);
 void stop_progress(struct progress **progress);
 void stop_progress_msg(struct progress **progress, const char *msg);
 
-- 
1.7.7.rc0.dirty