From 0ebdbe72c4fd1a93e5c021d2f9e1f924c61d7f12 Mon Sep 17 00:00:00 2001
From: Konstantin Nazarov <mail@knazarov.com>
Date: Wed, 28 Jul 2021 22:47:04 +0000
Subject: [PATCH] Add support for horizontal rules

---
 markdown.awk |  6 ++++++
 test.sh      | 15 +++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/markdown.awk b/markdown.awk
index 600817e..8aeca14 100644
--- a/markdown.awk
+++ b/markdown.awk
@@ -354,6 +354,12 @@ function parse_block(str) {
 	else if (substr(str, 1, 1) == ">") {
 		return parse_blockquote(str);
 	}
+	else if ( \
+		match(str, /^[[:space:]]*\*[[:space:]]*\*[[:space:]]*\*[[:space:]]*$/) ||
+		match(str, /^[[:space:]]*-[[:space:]]*-[[:space:]]*-[[:space:]]*$/) ||
+		match(str, /^[[:space:]]*_[[:space:]]*_[[:space:]]*_[[:space:]]*$/)) {
+			return "<hr />";
+	}
 	else if (match(str, /^[-+*][[:space:]]/) || match(str, /^[[:digit:]]\.[[:space:]]/)) {
 		return parse_list(str);
 	}
diff --git a/test.sh b/test.sh
index e56b701..be8f946 100755
--- a/test.sh
+++ b/test.sh
@@ -423,5 +423,20 @@ Link with title: [foo](/bar "baz")
 <p>Link with title: <a href="/bar" title="baz">foo</a></p>
 EOF
 
+check <<-"EOF"
+Horizontal rules:
+
+- - -
+
+* * *
+
+_ _ _
+---
+<p>Horizontal rules:</p>
+<hr />
+<hr />
+<hr />
+EOF
+
 echo 
 echo "All tests passed"