From efd314189433977708abf43ae76ac94cd753d80c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Andr=C3=A9=20Tanner?= <mat@brain-dump.org>
Date: Thu, 17 Sep 2020 14:44:40 +0200
Subject: vis: provide reverse mapping function for mark names

---
 vis-marks.c | 10 ++++++++++
 vis.h       |  3 ++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/vis-marks.c b/vis-marks.c
index e616f1d..8ae97ac 100644
--- a/vis-marks.c
+++ b/vis-marks.c
@@ -226,6 +226,16 @@ enum VisMark vis_mark_from(Vis *vis, char mark) {
 	return VIS_MARK_INVALID;
 }
 
+char vis_mark_to(Vis *vis, enum VisMark mark) {
+	if (VIS_MARK_a <= mark && mark <= VIS_MARK_z)
+		return 'a' + mark - VIS_MARK_a;
+
+	if (mark < LENGTH(vis_marks))
+		return vis_marks[mark].name;
+
+	return '\0';
+}
+
 const MarkDef vis_marks[] = {
 	[VIS_MARK_DEFAULT]        = { '\'', VIS_HELP("Default mark")    },
 	[VIS_MARK_SELECTION]      = { '^',  VIS_HELP("Last selections") },
diff --git a/vis.h b/vis.h
index 9d8bd28..eb84d4b 100644
--- a/vis.h
+++ b/vis.h
@@ -673,8 +673,9 @@ enum VisMark {
  * @defgroup vis_marks
  * @{
  */
-/** Translate single character mark name to corresponding constant. */
+/** Translate between single character mark name and corresponding constant. */
 enum VisMark vis_mark_from(Vis*, char mark);
+char vis_mark_to(Vis*, enum VisMark);
 /**
  * Specify mark to use.
  * @rst
-- 
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