From 6d16d197353e43b0fc299b8c250bdbff0c581b15 Mon Sep 17 00:00:00 2001
From: Tzu-ping Chung <uranusjr@gmail.com>
Date: Fri, 14 Nov 2014 10:25:12 +0800
Subject: [PATCH] Special-case comment tag to ignore all its content

Fix #143
---
 src/html_smartypants.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/html_smartypants.c b/src/html_smartypants.c
index bbe4fc5..b0904da 100644
--- a/src/html_smartypants.c
+++ b/src/html_smartypants.c
@@ -313,6 +313,16 @@ smartypants_cb__ltag(hoedown_buffer *ob, struct smartypants_data *smrt, uint8_t
 
 	size_t tag, i = 0;
 
+	/* This is a comment. Copy everything verbatim until --> or EOF is seen. */
+	if (i + 4 < size && memcmp(text, "<!--", 4) == 0) {
+		i += 4;
+		while (i + 3 < size && memcmp(text + i, "-->",  3) != 0)
+			i++;
+		i += 3;
+		hoedown_buffer_put(ob, text, i + 1);
+		return i;
+	}
+
 	while (i < size && text[i] != '>')
 		i++;