From 28ebbd9bf1300bc7d763a0f02facad70ee60190f Mon Sep 17 00:00:00 2001
From: Erik Dubbelboer <erik@dubbelboer.com>
Date: Sun, 15 Jun 2025 12:14:07 +0900
Subject: [PATCH] Drop support before go1.20 (#2022)

We still had old implementations of s2b and b2s that didn't require
unsafe.StringData and unsafe.SliceData that were added in go1.20. Since
we don't support go1.20 anymore we can drop these functions.
---
 b2s_new.go => b2s.go                   |  2 --
 b2s_old.go                             | 14 --------------
 fasthttpadaptor/{b2s_new.go => b2s.go} |  2 --
 fasthttpadaptor/b2s_old.go             | 14 --------------
 s2b_new.go => s2b.go                   |  2 --
 s2b_old.go                             | 21 ---------------------
 6 files changed, 55 deletions(-)
 rename b2s_new.go => b2s.go (93%)
 delete mode 100644 b2s_old.go
 rename fasthttpadaptor/{b2s_new.go => b2s.go} (93%)
 delete mode 100644 fasthttpadaptor/b2s_old.go
 rename s2b_new.go => s2b.go (90%)
 delete mode 100644 s2b_old.go

diff --git a/b2s_new.go b/b2s.go
similarity index 93%
rename from b2s_new.go
rename to b2s.go
index a45222c..24ba337 100644
--- a/b2s_new.go
+++ b/b2s.go
@@ -1,5 +1,3 @@
-//go:build go1.20
-
 package fasthttp
 
 import "unsafe"
diff --git a/b2s_old.go b/b2s_old.go
deleted file mode 100644
index f6e9466..0000000
--- a/b2s_old.go
+++ /dev/null
@@ -1,14 +0,0 @@
-//go:build !go1.20
-
-package fasthttp
-
-import "unsafe"
-
-// b2s converts byte slice to a string without memory allocation.
-// See https://groups.google.com/forum/#!msg/Golang-Nuts/ENgbUzYvCuU/90yGx7GUAgAJ .
-//
-// Note it may break if string and/or slice header will change
-// in the future go versions.
-func b2s(b []byte) string {
-	return *(*string)(unsafe.Pointer(&b))
-}
diff --git a/fasthttpadaptor/b2s_new.go b/fasthttpadaptor/b2s.go
similarity index 93%
rename from fasthttpadaptor/b2s_new.go
rename to fasthttpadaptor/b2s.go
index 6246e30..ec8dcbc 100644
--- a/fasthttpadaptor/b2s_new.go
+++ b/fasthttpadaptor/b2s.go
@@ -1,5 +1,3 @@
-//go:build go1.20
-
 package fasthttpadaptor
 
 import "unsafe"
diff --git a/fasthttpadaptor/b2s_old.go b/fasthttpadaptor/b2s_old.go
deleted file mode 100644
index a025198..0000000
--- a/fasthttpadaptor/b2s_old.go
+++ /dev/null
@@ -1,14 +0,0 @@
-//go:build !go1.20
-
-package fasthttpadaptor
-
-import "unsafe"
-
-// b2s converts byte slice to a string without memory allocation.
-// See https://groups.google.com/forum/#!msg/Golang-Nuts/ENgbUzYvCuU/90yGx7GUAgAJ .
-//
-// Note it may break if string and/or slice header will change
-// in the future go versions.
-func b2s(b []byte) string {
-	return *(*string)(unsafe.Pointer(&b))
-}
diff --git a/s2b_new.go b/s2b.go
similarity index 90%
rename from s2b_new.go
rename to s2b.go
index aedc448..2659264 100644
--- a/s2b_new.go
+++ b/s2b.go
@@ -1,5 +1,3 @@
-//go:build go1.20
-
 package fasthttp
 
 import "unsafe"
diff --git a/s2b_old.go b/s2b_old.go
deleted file mode 100644
index 50a034b..0000000
--- a/s2b_old.go
+++ /dev/null
@@ -1,21 +0,0 @@
-//go: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) {
-	bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
-	sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
-	bh.Data = sh.Data
-	bh.Cap = sh.Len
-	bh.Len = sh.Len
-	return b
-}