From 2943b3850c5cb9e4561c3d109b4513a123bf4db7 Mon Sep 17 00:00:00 2001
From: Jordan Milne <jordan.milne@saynotolinux.com>
Date: Thu, 18 Sep 2014 17:21:12 -0300
Subject: Use a lookup table for subject_find_special_char

---
 src/inlines.c | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/src/inlines.c b/src/inlines.c
index 145825c..71d75e9 100644
--- a/src/inlines.c
+++ b/src/inlines.c
@@ -768,13 +768,29 @@ node_inl *parse_chunk_inlines(chunk *chunk, reference_map *refmap)
 
 static int subject_find_special_char(subject *subj)
 {
-	static const char CHARS[] = "\n\\`&_*[]<!";
-	static const size_t CHARS_SIZE = sizeof(CHARS) - 1;
+	// "\n\\`&_*[]<!"
+	static const int8_t SPECIAL_CHARS[256] = {
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1,
+		1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 
 	int n = subj->pos + 1;
 
 	while (n < subj->input.len) {
-		if (memchr(CHARS, subj->input.data[n], CHARS_SIZE))
+		if (SPECIAL_CHARS[subj->input.data[n]])
 			return n;
 		n++;
 	}
-- 
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