all: use for-range with numeric

Go 1.22 now support for-range on numeric value.

4 files changed, 23 insertions, 25 deletions

diff --git a/lib/ini/common_test.go b/lib/ini/common_test.go
index 5ceaa3eb..c41de518 100644
--- a/lib/ini/common_test.go
+++ b/lib/ini/common_test.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 ini
 
@@ -110,12 +110,11 @@ func TestParseTag_fromStruct(t *testing.T) {
 		field reflect.StructField
 		tag   string
 		got   []string
-		x     int
 	)
 
 	vtype = reflect.TypeOf(adt)
 
-	for x = 0; x < vtype.NumField(); x++ {
+	for x := range vtype.NumField() {
 		field = vtype.Field(x)
 
 		tag, _, _ = libreflect.Tag(field, "ini")
diff --git a/lib/ini/ini.go b/lib/ini/ini.go
index 47eeb382..a75ac0d2 100644
--- a/lib/ini/ini.go
+++ b/lib/ini/ini.go
@@ -155,9 +155,8 @@ func (in *Ini) marshalStruct(
 		tag    string
 		layout string
 		tags   []string
-		x      int
 	)
-	for x = 0; x < numField; x++ {
+	for x := range numField {
 		field = rtipe.Field(x)
 		fvalue = rvalue.Field(x)
 		ftype = field.Type
@@ -396,7 +395,7 @@ func (in *Ini) Section(secName, subName string) (sec *Section) {
 	}
 
 	secName = strings.ToLower(secName)
-	for x := 0; x < len(in.secs); x++ {
+	for x := range len(in.secs) {
 		if secName != in.secs[x].nameLower {
 			continue
 		}
@@ -501,7 +500,7 @@ func (in *Ini) addSection(sec *Section) {
 func (in *Ini) AsMap(sectionName, subName string) (out map[string][]string) {
 	out = make(map[string][]string)
 
-	for x := 0; x < len(in.secs); x++ {
+	for x := range len(in.secs) {
 		sec := in.secs[x]
 
 		if len(sectionName) > 0 && sectionName != sec.nameLower {
@@ -511,7 +510,7 @@ func (in *Ini) AsMap(sectionName, subName string) (out map[string][]string) {
 			continue
 		}
 
-		for y := 0; y < len(sec.vars); y++ {
+		for y := range len(sec.vars) {
 			v := sec.vars[y]
 
 			if v.mode == lineModeEmpty {
@@ -667,7 +666,7 @@ func (in *Ini) Prune() {
 
 // mergeSection merge a section (and subsection) into slice.
 func mergeSection(secs []*Section, newSec *Section) []*Section {
-	for x := 0; x < len(secs); x++ {
+	for x := range len(secs) {
 		if secs[x].nameLower != newSec.nameLower {
 			continue
 		}
@@ -720,7 +719,7 @@ func (in *Ini) Subs(secName string) (subs []*Section) {
 
 	secName = strings.ToLower(secName)
 
-	for x := 0; x < len(in.secs); x++ {
+	for x := range len(in.secs) {
 		if in.secs[x].mode == lineModeEmpty || in.secs[x].mode == lineModeComment {
 			continue
 		}
@@ -817,7 +816,7 @@ func (in *Ini) Write(w io.Writer) (err error) {
 		v          *variable
 	)
 
-	for x := 0; x < len(in.secs); x++ {
+	for x := range len(in.secs) {
 		// Add an empty line before section statement.
 		if endWithVar {
 			fmt.Fprintln(w)
diff --git a/lib/ini/section.go b/lib/ini/section.go
index 70b64a9b..7859f961 100644
--- a/lib/ini/section.go
+++ b/lib/ini/section.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 ini
 
@@ -108,7 +108,7 @@ func (sec *Section) add(key, value string) bool {
 	keyLower := strings.ToLower(key)
 
 	idx := -1
-	for x := 0; x < len(sec.vars); x++ {
+	for x := range len(sec.vars) {
 		if !isLineModeVar(sec.vars[x].mode) {
 			continue
 		}
@@ -144,7 +144,7 @@ func (sec *Section) add(key, value string) bool {
 // list.
 func (sec *Section) addUniqValue(key, value string) {
 	keyLower := strings.ToLower(key)
-	for x := 0; x < len(sec.vars); x++ {
+	for x := range len(sec.vars) {
 		if sec.vars[x].keyLower == keyLower {
 			if sec.vars[x].value == value {
 				tmp := sec.vars[x]
@@ -244,7 +244,7 @@ func (sec *Section) gets(key string, defs []string) (vals []string, ok bool) {
 	}
 
 	key = strings.ToLower(key)
-	for x := 0; x < len(sec.vars); x++ {
+	for x := range len(sec.vars) {
 		if sec.vars[x].keyLower == key {
 			vals = append(vals, sec.vars[x].value)
 		}
@@ -258,7 +258,7 @@ func (sec *Section) gets(key string, defs []string) (vals []string, ok bool) {
 // merge other Section variables on this section, ignoring empty or comment
 // mode.
 func (sec *Section) merge(other *Section) {
-	for x := 0; x < len(other.vars); x++ {
+	for x := range len(other.vars) {
 		if !isLineModeVar(other.vars[x].mode) {
 			continue
 		}
@@ -346,7 +346,7 @@ func (sec *Section) unsetAll(key string) {
 	vars := make([]*variable, 0, len(sec.vars))
 	key = strings.ToLower(key)
 
-	for x := 0; x < len(sec.vars); x++ {
+	for x := range len(sec.vars) {
 		if sec.vars[x].keyLower != key {
 			// Ignore the last empty line.
 			if x == len(sec.vars)-1 &&
diff --git a/lib/ini/tag_struct_field.go b/lib/ini/tag_struct_field.go
index 7411569d..672d5c97 100644
--- a/lib/ini/tag_struct_field.go
+++ b/lib/ini/tag_struct_field.go
@@ -1,6 +1,6 @@
-// Copyright 2021, 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: 2021 M. Shulhan <ms@kilabit.info>
+//
+// SPDX-License-Identifier: BSD-3-Clause
 
 package ini
 
@@ -34,7 +34,7 @@ func unpackTagStructField(rtype reflect.Type, rval reflect.Value) (out *tagStruc
 		return out
 	}
 
-	for x := 0; x < numField; x++ {
+	for x := range numField {
 		field := rtype.Field(x)
 		fval := rval.Field(x)
 		ftype := field.Type