all: use for-range with numeric

Go 1.22 now support for-range on numeric value.

3 files changed, 16 insertions, 20 deletions

diff --git a/lib/net/net.go b/lib/net/net.go
index 4add0435..e52831d1 100644
--- a/lib/net/net.go
+++ b/lib/net/net.go
@@ -1,6 +1,6 @@
-// Copyright 2018, Shulhan <ms@kilabit.info>. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// SPDX-FileCopyrightText: 2018 M. Shulhan <ms@kilabit.info>
+//
+// SPDX-License-Identifier: BSD-3-Clause
 
 // Package net provide constants and library for networking.
 package net
@@ -176,14 +176,14 @@ func ToDotIPv6(ip net.IP) (out []byte) {
 	addrs := strings.Split(ip.String(), ":")
 
 	var notempty int
-	for x := 0; x < len(addrs); x++ {
+	for x := range len(addrs) {
 		if len(addrs[x]) != 0 {
 			notempty++
 		}
 	}
 	gap := 8 - notempty
 
-	for x := 0; x < len(addrs); x++ {
+	for x := range len(addrs) {
 		addr := addrs[x]
 
 		// Fill the gap "::" with one or more "0.0.0.0".
@@ -205,7 +205,7 @@ func ToDotIPv6(ip net.IP) (out []byte) {
 			out = append(out, '0')
 		}
 
-		for y := 0; y < len(addr); y++ {
+		for y := range len(addr) {
 			if len(out) > 0 {
 				out = append(out, '.')
 			}
diff --git a/lib/net/poll_bsd.go b/lib/net/poll_bsd.go
index 80340fa7..668c3f58 100644
--- a/lib/net/poll_bsd.go
+++ b/lib/net/poll_bsd.go
@@ -1,6 +1,6 @@
-// Copyright 2019, Shulhan <ms@kilabit.info>. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// SPDX-FileCopyrightText: 2019 M. Shulhan <ms@kilabit.info>
+//
+// SPDX-License-Identifier: BSD-3-Clause
 
 //go:build darwin || dragonfly || freebsd || netbsd || openbsd
 
@@ -81,7 +81,6 @@ func (poll *kqueue) WaitRead() (fds []int, err error) {
 		logp = `WaitRead`
 
 		n  int
-		x  int
 		fd int
 	)
 	for n == 0 {
@@ -94,7 +93,7 @@ func (poll *kqueue) WaitRead() (fds []int, err error) {
 		}
 	}
 
-	for x = 0; x < n; x++ {
+	for x := range n {
 		if poll.events[x].Filter != unix.EVFILT_READ {
 			continue
 		}
@@ -124,7 +123,6 @@ func (poll *kqueue) WaitReadEvents() (events []PollEvent, err error) {
 		logp = `WaitReadEvents`
 
 		n  int
-		x  int
 		fd int
 	)
 
@@ -138,7 +136,7 @@ func (poll *kqueue) WaitReadEvents() (events []PollEvent, err error) {
 		}
 	}
 
-	for x = 0; x < n; x++ {
+	for x := range n {
 		if poll.events[x].Filter != unix.EVFILT_READ {
 			continue
 		}
diff --git a/lib/net/poll_linux.go b/lib/net/poll_linux.go
index 69cf56b5..e10fe88b 100644
--- a/lib/net/poll_linux.go
+++ b/lib/net/poll_linux.go
@@ -1,6 +1,6 @@
-// Copyright 2019, Shulhan <ms@kilabit.info>. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// SPDX-FileCopyrightText: 2019 M. Shulhan <ms@kilabit.info>
+//
+// SPDX-License-Identifier: BSD-3-Clause
 
 //go:build linux
 
@@ -71,7 +71,6 @@ func (poll *epoll) WaitRead() (fds []int, err error) {
 		logp = `WaitRead`
 
 		n  int
-		x  int
 		fd int
 	)
 	for {
@@ -85,7 +84,7 @@ func (poll *epoll) WaitRead() (fds []int, err error) {
 		break
 	}
 
-	for x = 0; x < n; x++ {
+	for x := range n {
 		fd = int(poll.events[x].Fd)
 
 		err = poll.UnregisterRead(fd)
@@ -111,7 +110,6 @@ func (poll *epoll) WaitReadEvents() (events []PollEvent, err error) {
 		logp = `WaitReadEvents`
 
 		n  int
-		x  int
 		fd int
 	)
 
@@ -126,7 +124,7 @@ func (poll *epoll) WaitReadEvents() (events []PollEvent, err error) {
 		break
 	}
 
-	for x = 0; x < n; x++ {
+	for x := range n {
 		fd = int(poll.events[x].Fd)
 
 		err = poll.UnregisterRead(fd)