Add support for Go 1.20 (#1481)

1 files changed, 24 insertions, 0 deletions

diff --git a/s2b_old.go b/s2b_old.go
new file mode 100644
index 0000000..4cc141c
--- /dev/null
+++ b/s2b_old.go
@@ -0,0 +1,24 @@
+//go:build !go1.20
+// +build !go1.20
+
+package fasthttp
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// s2b converts string to a byte slice without memory allocation.
+//
+// Note it may break if string and/or slice header will change
+// in the future go versions.
+func s2b(s string) (b []byte) {
+	/* #nosec G103 */
+	bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	/* #nosec G103 */
+	sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
+	bh.Data = sh.Data
+	bh.Cap = sh.Len
+	bh.Len = sh.Len
+	return b
+}