Import 'regex' package vesion 1.3.6
* Add OWNERS
* No Android.bp yet
Bug: 152884384
Test: make
Change-Id: I455caf7833b6c437c1c133bc7b2f47b83da9cbce
diff --git a/src/find_byte.rs b/src/find_byte.rs
new file mode 100644
index 0000000..e95f72a
--- /dev/null
+++ b/src/find_byte.rs
@@ -0,0 +1,18 @@
+/// Searches for the given needle in the given haystack.
+///
+/// If the perf-literal feature is enabled, then this uses the super optimized
+/// memchr crate. Otherwise, it uses the naive byte-at-a-time implementation.
+pub fn find_byte(needle: u8, haystack: &[u8]) -> Option<usize> {
+ #[cfg(not(feature = "perf-literal"))]
+ fn imp(needle: u8, haystack: &[u8]) -> Option<usize> {
+ haystack.iter().position(|&b| b == needle)
+ }
+
+ #[cfg(feature = "perf-literal")]
+ fn imp(needle: u8, haystack: &[u8]) -> Option<usize> {
+ use memchr::memchr;
+ memchr(needle, haystack)
+ }
+
+ imp(needle, haystack)
+}