chore: add vendor directory

1 files changed, 57 insertions, 0 deletions

diff --git a/vendor/httparse/src/simd/runtime.rs b/vendor/httparse/src/simd/runtime.rs
new file mode 100644
index 00000000..c523a921
--- /dev/null
+++ b/vendor/httparse/src/simd/runtime.rs
@@ -0,0 +1,57 @@
+use std::sync::atomic::{AtomicU8, Ordering};
+use crate::iter::Bytes;
+use super::avx2;
+use super::sse42;
+
+const AVX2: u8 = 1;
+const SSE42: u8 = 2;
+const NOP: u8 = 3;
+
+fn detect_runtime_feature() -> u8 {
+    if is_x86_feature_detected!("avx2") {
+        AVX2
+    } else if is_x86_feature_detected!("sse4.2") {
+        SSE42
+    } else {
+        NOP
+    }
+}
+
+static RUNTIME_FEATURE: AtomicU8 = AtomicU8::new(0);
+
+#[inline]
+fn get_runtime_feature() -> u8 {
+    let mut feature = RUNTIME_FEATURE.load(Ordering::Relaxed);
+    if feature == 0 {
+        feature = detect_runtime_feature();
+        RUNTIME_FEATURE.store(feature, Ordering::Relaxed);
+    }
+
+    feature
+}
+
+pub fn match_header_name_vectored(bytes: &mut Bytes) {
+    super::swar::match_header_name_vectored(bytes);
+}
+
+pub fn match_uri_vectored(bytes: &mut Bytes) {
+    // SAFETY: calls are guarded by a feature check
+    unsafe {
+        match get_runtime_feature() {
+            AVX2 => avx2::match_uri_vectored(bytes),
+            SSE42 => sse42::match_uri_vectored(bytes),
+            _ /* NOP */ => super::swar::match_uri_vectored(bytes),
+        }
+    }
+}
+
+pub fn match_header_value_vectored(bytes: &mut Bytes) {
+    // SAFETY: calls are guarded by a feature check
+    unsafe {
+        match get_runtime_feature() {
+            AVX2 => avx2::match_header_value_vectored(bytes),
+            SSE42 => sse42::match_header_value_vectored(bytes),
+            _ /* NOP */ => super::swar::match_header_value_vectored(bytes),
+        }
+    }
+}