replace twoway with memchr

Fixes #223.

Cargo.toml

@@ -28,7 +28,7 @@ lazy_static = "1.0.1"
 entities = "1.0.1"
 unicode_categories = "0.1.1"
 clap = { version = "2.32.0", optional = true }
-twoway = "0.2"
+memchr = "2"
 pest = "2"
 pest_derive = "2"
 shell-words = "1.0"

src/lib.rs

@@ -77,6 +77,7 @@ extern crate lazy_static;
 extern crate pest;
 #[macro_use]
 extern crate pest_derive;
+extern crate memchr;
 #[cfg(all(test, not(target_arch = "wasm32")))]
 extern crate propfuzz;
 extern crate regex;
@@ -86,7 +87,6 @@ extern crate syntect;
 extern crate test;
 #[cfg(test)]
 extern crate timebomb;
-extern crate twoway;
 extern crate typed_arena;
 extern crate unicode_categories;
 

src/scanners.rs

@@ -9,9 +9,9 @@
 
 */
 
+use memchr::memmem;
 use pest::Parser;
 use std::str;
-use twoway::find_bytes;
 
 #[cfg(debug_assertions)]
 const _LEXER: &str = include_str!("lexer.pest");
@@ -44,19 +44,19 @@ pub fn atx_heading_start(line: &[u8]) -> Option<usize> {
 #[inline(always)]
 pub fn html_block_end_1(line: &[u8]) -> bool {
     // XXX: should be case-insensitive
-    find_bytes(line, b"</script>").is_some()
-        || find_bytes(line, b"</pre>").is_some()
-        || find_bytes(line, b"</style>").is_some()
+    memmem::find(line, b"</script>").is_some()
+        || memmem::find(line, b"</pre>").is_some()
+        || memmem::find(line, b"</style>").is_some()
 }
 
 #[inline(always)]
 pub fn html_block_end_2(line: &[u8]) -> bool {
-    find_bytes(line, b"-->").is_some()
+    memmem::find(line, b"-->").is_some()
 }
 
 #[inline(always)]
 pub fn html_block_end_3(line: &[u8]) -> bool {
-    find_bytes(line, b"?>").is_some()
+    memmem::find(line, b"?>").is_some()
 }
 
 #[inline(always)]
@@ -66,7 +66,7 @@ pub fn html_block_end_4(line: &[u8]) -> bool {
 
 #[inline(always)]
 pub fn html_block_end_5(line: &[u8]) -> bool {
-    find_bytes(line, b"]]>").is_some()
+    memmem::find(line, b"]]>").is_some()
 }
 
 #[inline(always)]