From a889c58de78711cb9b53de6cfcc9272c8518c729 Mon Sep 17 00:00:00 2001
From: hopehook <hopehook@qq.com>
Date: Thu, 2 Mar 2023 08:12:20 +0800
Subject: [PATCH] Convert strings and slices using the officially recommended
 way (#3344)

* Feat: Convert strings and slices using the officially recommended way.

Go official is expected to provide unsafe.{SliceData, Slice, StringData,
String} series methods in version 1.20 for conversion of strings and
slices.

* chore: add reference documentation link to comment of code

* chore: update Copyright

* chore: remove build tag "+build !go1.20"
---
 go.mod                                        |  2 +-
 .../{bytesconv.go => bytesconv_1.19.go}       |  2 ++
 internal/bytesconv/bytesconv_1.20.go          | 23 +++++++++++++++++++
 3 files changed, 26 insertions(+), 1 deletion(-)
 rename internal/bytesconv/{bytesconv.go => bytesconv_1.19.go} (96%)
 create mode 100644 internal/bytesconv/bytesconv_1.20.go

diff --git a/go.mod b/go.mod
index 484e388..0358006 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/gin-gonic/gin
 
-go 1.18
+go 1.20
 
 require (
 	github.com/bytedance/sonic v1.8.2
diff --git a/internal/bytesconv/bytesconv.go b/internal/bytesconv/bytesconv_1.19.go
similarity index 96%
rename from internal/bytesconv/bytesconv.go
rename to internal/bytesconv/bytesconv_1.19.go
index 86e4c4d..669c9c9 100644
--- a/internal/bytesconv/bytesconv.go
+++ b/internal/bytesconv/bytesconv_1.19.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a MIT style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.20
+
 package bytesconv
 
 import (
diff --git a/internal/bytesconv/bytesconv_1.20.go b/internal/bytesconv/bytesconv_1.20.go
new file mode 100644
index 0000000..5b6040a
--- /dev/null
+++ b/internal/bytesconv/bytesconv_1.20.go
@@ -0,0 +1,23 @@
+// Copyright 2023 Gin Core Team. All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+//go:build go1.20
+
+package bytesconv
+
+import (
+	"unsafe"
+)
+
+// StringToBytes converts string to byte slice without a memory allocation.
+// For more details, see https://github.com/golang/go/issues/53003#issuecomment-1140276077.
+func StringToBytes(s string) []byte {
+	return unsafe.Slice(unsafe.StringData(s), len(s))
+}
+
+// BytesToString converts byte slice to string without a memory allocation.
+// For more details, see https://github.com/golang/go/issues/53003#issuecomment-1140276077.
+func BytesToString(b []byte) string {
+	return unsafe.String(unsafe.SliceData(b), len(b))
+}