From 99c0d3799541604df3abe328573ea50e507550f1 Mon Sep 17 00:00:00 2001
From: xiaoqidun <xiaoqidun@gmail.com>
Date: Mon, 31 Aug 2026 16:42:14 +0800
Subject: [PATCH] =?UTF-8?q?feat(=E6=98=AF=E5=90=A6=E5=AD=98=E5=9C=A8):=20?=
 =?UTF-8?q?=E6=96=B0=E5=A2=9E=E5=88=86=E5=8C=BA=E5=92=8C=E9=85=8D=E7=BD=AE?=
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---
 goini.go    | 54 ++++++++++++++++++-----------------------------------
 internal.go | 38 +++++++++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+), 36 deletions(-)

diff --git a/goini.go b/goini.go
index ad2b8eb..3185f0b 100644
--- a/goini.go
+++ b/goini.go
@@ -94,42 +94,6 @@ func (ini *GoINI) SaveFormatFile(filename string, perm os.FileMode) error {
 	return nil
 }
 
-func (ini *GoINI) save(data string) error {
-	if ini.filename == "" {
-		return errFilenameRequired
-	}
-	info, err := os.Stat(ini.filename)
-	if err != nil {
-		return err
-	}
-	return ini.saveFile(ini.filename, data, info.Mode().Perm())
-}
-
-func (ini *GoINI) saveFile(filename string, data string, perm os.FileMode) error {
-	if filename == "" {
-		return errFilenameRequired
-	}
-	perm = perm.Perm()
-	writePerm := perm | 0o200
-	if info, err := os.Stat(filename); err == nil {
-		if info.Mode().IsRegular() {
-			if err := os.Chmod(filename, writePerm); err != nil {
-				return err
-			}
-		}
-	} else if !errors.Is(err, os.ErrNotExist) {
-		return err
-	}
-	if err := os.WriteFile(filename, []byte(data), writePerm); err != nil {
-		return err
-	}
-	if err := os.Chmod(filename, perm); err != nil {
-		return err
-	}
-	ini.filename = filename
-	return nil
-}
-
 // String 获取GoINI对象的字符串形式
 // 返回: string 配置文件内容
 func (ini *GoINI) String() string {
@@ -229,6 +193,24 @@ func (ini *GoINI) GetNameKeys(name string, match string) []string {
 	return matchStrings(ini.sectionKeys[name], match)
 }
 
+// HasSection 判断分区是否存在
+// 入参: name 分区名称
+// 返回: bool 是否存在
+func (ini *GoINI) HasSection(name string) bool {
+	name = ini.normalizeSection(name)
+	_, ok := ini.sectionValues[name]
+	return ok
+}
+
+// HasKey 判断分区下配置项是否存在
+// 入参: name 分区名称, key 配置项名称
+// 返回: bool 是否存在
+func (ini *GoINI) HasKey(name string, key string) bool {
+	name = ini.normalizeSection(name)
+	_, ok := ini.sectionValues[name][key]
+	return ok
+}
+
 // GetString 获取单个配置项的字符串值
 // 入参: name 分区名称, key 配置项名称, value 默认值
 // 返回: string 配置项值
diff --git a/internal.go b/internal.go
index afd5aac..d5a7c71 100644
--- a/internal.go
+++ b/internal.go
@@ -1,6 +1,8 @@
 package goini
 
 import (
+	"errors"
+	"os"
 	"reflect"
 	"regexp"
 	"strconv"
@@ -143,6 +145,42 @@ func hasSurroundingQuotes(value string) bool {
 	return first == last && (first == '"' || first == '\'' || first == '`')
 }
 
+func (ini *GoINI) save(data string) error {
+	if ini.filename == "" {
+		return errFilenameRequired
+	}
+	info, err := os.Stat(ini.filename)
+	if err != nil {
+		return err
+	}
+	return ini.saveFile(ini.filename, data, info.Mode().Perm())
+}
+
+func (ini *GoINI) saveFile(filename string, data string, perm os.FileMode) error {
+	if filename == "" {
+		return errFilenameRequired
+	}
+	perm = perm.Perm()
+	writePerm := perm | 0o200
+	if info, err := os.Stat(filename); err == nil {
+		if info.Mode().IsRegular() {
+			if err := os.Chmod(filename, writePerm); err != nil {
+				return err
+			}
+		}
+	} else if !errors.Is(err, os.ErrNotExist) {
+		return err
+	}
+	if err := os.WriteFile(filename, []byte(data), writePerm); err != nil {
+		return err
+	}
+	if err := os.Chmod(filename, perm); err != nil {
+		return err
+	}
+	ini.filename = filename
+	return nil
+}
+
 func (ini *GoINI) rebuildIndexes() {
 	ini.sectionKeys = make(map[string][]string)
 	ini.sectionOrder = nil