[chore] Update gin to v1.9.0 (#1553)

vendor/github.com/bytedance/sonic/internal/caching/hashing.go

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 ByteDance Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package caching
+
+import (
+    `unsafe`
+
+    `github.com/bytedance/sonic/internal/rt`
+)
+
+var (
+    V_strhash = rt.UnpackEface(strhash)
+    S_strhash = *(*uintptr)(V_strhash.Value)
+)
+
+//go:noescape
+//go:linkname strhash runtime.strhash
+func strhash(_ unsafe.Pointer, _ uintptr) uintptr
+
+func StrHash(s string) uint64 {
+    if v := strhash(unsafe.Pointer(&s), 0); v == 0 {
+        return 1
+    } else {
+        return uint64(v)
+    }
+}