Track the CHANGES for version 1.8.0

Update README.md

.gitignore

@@ -3,12 +3,44 @@
 *.o
 *.pyc
 *~
+*.log
+*.la
+*.so
 META-INF/
+
 # Binary Files #
 *.jar
+!dbMaker-*.jar
+
 # Package Files #
 .settings/
 .classpath
 .project
+
 # vim swp file #
 *.swp
+.idea
+
+# binding
+/binding/java/classes/
+/binding/java/doc/
+/binding/java/target/
+/binding/java/*.jar
+
+/binding/c/testSearcher
+
+# rust
+Cargo.lock
+target
+
+
+# VS ignore cases
+/**/*.sln
+/binding/c#/**/.vs/
+/binding/c#/**/packages
+/binding/c#/**/bin
+/binding/c#/**/obj
+
+# Nodejs
+/binding/nodejs/tests/unitTests/__snapshots__
+/binding/nodejs/coverage

CHANGES.md

@@ -1,3 +1,47 @@
+### 1.8
+1. 数据升级至2018/12/31的版本，国外的也增加了大量的城市数据。
+2. Java的binding的Searcher类增加了如下的接口和实现：
+```
+DbSearcher(DbConfig dbConfig, string dbBinStr);
+```
+3. Javascript的pacakge上传到了npm。
+4. 增加纯lua实现的lua binding。
+5. 增加C实现的lua_c binding。
+6. 优化部分binding的demo运行和使用文档。
+7. 修复python binding的benchmark的部分错误。
+
+
+### 1.2.4
+1, 花了近两周的时间重写了数据的升级算法，再次提高准确率，升级过程如下（此处应该有掌声）：
+
+```shell
+1. ip预分段，利于分布式同步升级
+2. 分段同步升级，目前使用四个机器同时升级
+3，自动验证数据查缺补全
+4，数据合并
+5，数据格式标准化，目前2个工作：
+    1)，ipip.net的数据和淘宝数据保持区域名称统一，ipip.net的数据不带“省”和“市”关键字。
+    2)，香港澳门台湾等国家信息修复（淘宝原始数据有问题），reported at http://git.oschina.net/lionsoul/ip2region/issues/21
+6，重复ip段的合并得到data目录下的ip.merge.txt
+7，生产data目录下的ip2region.db二进制数据库文件
+```
+
+2，修复原始数据关于“香港，台湾，澳门”国家信息错误的bug，reported at http://git.oschina.net/lionsoul/ip2region/issues/21
+3，将数据升级至：2017/03/15同步版本
+4，增加c_mmap查询客户端，C客户端查询文件读取使用内存映射加速，感谢[Leo Ma](http://git.oschina.net/begeekmyfriend)的贡献
+
+备注：部分阿里云数据有问题，缺失的部分使用免费开放的ipip.net的数据代替了。
+
+### 1.2.3
+1. 优化升级算法，进行更深度的分裂，可以使准确率再度提高（同时数据的更新也花费了2天多的时间）。
+2. 数据升级至2016/12/14版本的数据（包括原始数据和binary数据库的数据）。
+
+### 1.2.2
+
+1. ip数据文件更新至2016/11/02版本
+2. 增加ip2region.db数据库文件的java生成工具，请参考README获取使用方式
+3. 新增golang查询客户端的实现，感谢 [@mohong122](https://github.com/mohong122) 的关注和贡献
+
 ### 1.2
 
 1. 新增分列式升级算法，大大的增加了数据的准确率，基本避免之前各大网友反馈的些许ip定位错误！

Cargo.toml

@@ -0,0 +1,2 @@
+[workspace]
+members = ["binding/rust", "binding/rust/example"]

LICENSE.md

@@ -201,9 +201,9 @@
    limitations under the License.
 
 ==========================================================================
-The following license applies to the JQuery JavaScript library
+The following license applies to the ip2region library
 --------------------------------------------------------------------------
-Copyright (c) 2010 John Resig, http://jquery.com/
+Copyright (c) 2015 Lionsoul<chenxin619315@gmail.com>
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
@@ -223,4 +223,3 @@ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-

README.md

@@ -1,57 +1,85 @@
 ip2region - 最自由的ip地址查询库，ip到地区的映射库，提供Binary,B树和纯内存三种查询算法，妈妈再也不用担心我的ip地址定位。
 
-**1. 99.9%准确率，定时更新：**
+### 1. 99.9%准确率，定时更新：
 
 数据聚合了一些知名ip到地名查询提供商的数据，这些是他们官方的的准确率，经测试着实比纯真啥的准确多了。<br />
 每次聚合一下数据需要1-2天，会不定时更新。
 
-**2. 标准化的数据格式：**
+### 2. 标准化的数据格式：
 
 每条ip数据段都固定了格式：_城市Id|国家|区域|省份|城市|ISP_
 
 只有中国的数据精确到了城市，其他国家只能定位到国家，后前的选项全部是0，已经包含了全部你能查到的大大小小的国家。
 （请忽略前面的城市Id，个人项目需求）
 
-**3. 体积小：**
+### 3. 体积小：
 
 生成的数据库文件ip2region.db只有1.5M（1.2版本前是3.5M）
 
-**4. 多查询客户端的支持，0.0x毫秒级别的查询**
+### 4. 多查询客户端的支持，0.0x毫秒级别的查询
 
-已经集成的客户端有：java, php, c, python，nodejs，php扩展(支持linux, php5, php7版本已支持)。
+已经集成的客户端有：java、C#、php、c、python、nodejs、php扩展(php5和php7)、golang、rust、lua、lua_c。
 
     提供了两种查询算法，响应时间如下：
     客户端/binary算法/b-tree算法/Memory算法：
+    c#/0.x毫秒/0.x毫秒/0.x毫秒
     java/0.x毫秒/0.x毫秒/0.1x毫秒 (使用RandomAccessFile)
     php/0.x毫秒/0.1x毫秒/0.1x毫秒
     c/0.0x毫秒/0.0x毫秒/0.00x毫秒(b-tree算法基本稳定在0.02x毫秒级别)
     python/0.x毫秒/0.1x毫秒/未知
+    lua/0.x毫秒/0.x毫秒/0.x毫秒
+    lua_c/0.0x毫秒/0.0x毫秒/0.00x毫秒
 
 任何客户端b-tree都比binary算法快，当然Memory算法固然是最快的！
 
-**5. 测试程序：**
+maven仓库地址：
-java: 
+```xml
+<dependency>
+    <groupId>org.lionsoul</groupId>
+    <artifactId>ip2region</artifactId>
+    <version>1.7.2</version>
+</dependency>
+```
+nuget安装命令
+```shell
+Install-Package IP2Region
+```
 
+### 5. 测试程序：
+C#、Node.js、lua_c的测试请具体参考文件夹中README.md 说明。
+
+java: 
+```shell
 cd binding/java
 ant all
 java -jar ip2region-{version}.jar ./data/ip2region.db
+```
 
 php: 
-
+```shell
-    php binding/php/testSearcher ./data/ip2region.db
+php binding/php/testSearcher.php ./data/ip2region.db
+```
 
 c: 
-
+```shell
 cd binding/c/
 gcc -g -O2 testSearcher.c ip2region.c
 ./a.out ../../data/ip2region.db
+```
 
 python: 
+```shell
+python binding/python/testSearcher.py ./data/ip2region.db
+```
 
-    python binding/python/testSearcher ./data/ip2region.db
+lua: 
+```shell
+cd binding/lua/
+lua testSearcher.lua ../../data/ip2region.db
+```
 
 均会看到如下界面：
-
+```shell
 initializing  B-tree ... 
 +----------------------------------+
 | ip2region test script            |
@@ -60,7 +88,41 @@ python:
 +----------------------------------+
 p2region>> 101.105.35.57
 2163|中国|华南|广东省|深圳市|鹏博士 in 0.02295 millseconds
+```
 
 输入ip地址开始测试，第一次会稍微有点慢，在运行命令后面接入binary,memory来尝试其他算法，建议使用b-tree算法，速度和并发需求的可以使用memory算法。
 
 具体集成请参考不同客户端的测试源码。
+
+
+### 6. 如何生成ip2region.db文件
+
+从ip2region 1.2.2版本开始里面提交了一个dbMaker-{version}.jar的可以执行jar文件，用它来完成这个工作：
+* 1, 确保你安装好了java环境（不玩Java的童鞋就自己谷歌找找拉，临时用一用，几分钟的事情）
+* 2, cd到ip2region的根目录，然后运行如下命令：
+
+```shell
+java -jar dbMaker-{version}.jar -src 文本数据文件 -region 地域csv文件 [-dst 生成的ip2region.db文件的目录]
+
+# 文本数据文件：db文件的原始文本数据文件路径，自带的ip2region.db文件就是/data/ip.merge.txt生成而来的，你可以换成自己的或者更改/data/ip.merge.txt重新生成
+# 地域csv文件：该文件目的是方便配置ip2region进行数据关系的存储，得到的数据包含一个city_id，这个直接使用/data/origin/global_region.csv文件即可
+# ip2region.db文件的目录：是可选参数，没有指定的话会在当前目录生成一份./data/ip2region.db文件
+```
+
+* 3, 获取生成的ip2region.db文件覆盖原来的ip2region.db文件即可
+* 4, 默认的ip2region.db文件生成命令:
+
+```shell
+cd ip2region项目根目录
+java -jar dbMaker-1.2.2.jar -src ./data/ip.merge.txt -region ./data/global_region.csv
+
+# 会看到一大片的输出
+```
+
+* 5, 数据库文件的结构和原理请阅读 @冬芽 的blog：[“ip2region数据库文件的结构和原理”](http://dongyado.com/tool/2016/08/18/structure-of-ip2region-database-file/)
+
+
+### 7. 其他备注
+* 1, 全部binding的各个search接口都<b>不是</b>线程安全的实现，不同线程可以通过创建不同的查询对象来使用。
+* 2, memorySearch接口，在发布对象前进行一次预查询，可以安全用于多线程环境。
+* 3, ip2region交流分享，微信：lionsoul2014，QQ：1187582057

binding/c#/IP2Region.Test.Benchmark/DbSearch_Test.cs

@@ -0,0 +1,54 @@
+using BenchmarkDotNet.Attributes;
+using IP2Region.Models;
+using System.Threading.Tasks;
+
+namespace IP2Region.Test.Benchmark
+{
+    [RankColumn]
+    public class DbSearch_Test : TestBase
+    {
+        private string RandomIP = "";
+
+        [Benchmark]
+        public DataBlock MemorySearch()
+        {
+            RandomIP = GetRandomIP();
+            return _search.MemorySearch(RandomIP);
+        }
+
+        [Benchmark]
+        public async Task<DataBlock> MemorySearch_Async()
+        {
+            RandomIP = GetRandomIP();
+            return await _search.MemorySearchAsync(RandomIP);
+        }
+
+        [Benchmark]
+        public DataBlock BinarySearch()
+        {
+            RandomIP = GetRandomIP();
+            return _search.BinarySearch(RandomIP);
+        }
+
+        [Benchmark]
+        public async Task<DataBlock> BinarySearch_Async()
+        {
+            RandomIP = GetRandomIP();
+            return await _search.BinarySearchAsync(RandomIP);
+        }
+
+        [Benchmark]
+        public DataBlock BtreeSearch()
+        {
+            RandomIP = GetRandomIP();
+            return _search.BtreeSearch(RandomIP);
+        }
+
+        [Benchmark]
+        public async Task<DataBlock> BtreeSearch_Async()
+        {
+            RandomIP = GetRandomIP();
+            return await _search.BtreeSearchAsync(RandomIP);
+        }
+    }
+}

binding/c#/IP2Region.Test.Benchmark/IP2Region.Test.Benchmark.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="BenchmarkDotNet" Version="0.11.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\IP2Region\IP2Region.csproj" />
+  </ItemGroup>
+
+</Project>

binding/c#/IP2Region.Test.Benchmark/Program.cs

@@ -0,0 +1,15 @@
+using BenchmarkDotNet.Running;
+using System;
+
+namespace IP2Region.Test.Benchmark
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Now starting benchmark test, please wait......");
+            var summary = BenchmarkRunner.Run<DbSearch_Test>();
+            Console.ReadLine();
+        }
+    }
+}

binding/c#/IP2Region.Test.Benchmark/TestBase.cs

@@ -0,0 +1,49 @@
+using BenchmarkDotNet.Attributes;
+using System;
+
+namespace IP2Region.Test.Benchmark
+{
+    public class TestBase
+    {
+        protected DbSearcher _search;
+
+        private readonly string _dBFilePath = "";
+        public TestBase()
+        {
+
+        }
+
+        public TestBase(String DBFilePath)
+        {
+            _dBFilePath = DBFilePath;
+        }
+
+        [GlobalSetup]
+        public void Init()
+        {
+            if (String.IsNullOrEmpty(_dBFilePath))
+            {
+                _search = new DbSearcher(AppContext.BaseDirectory + @"\DB\ip2region.db");
+            }
+            else
+            {
+                _search = new DbSearcher(_dBFilePath);
+            }
+
+        }
+
+        [GlobalCleanup]
+        public void Dispose()
+        {
+            _search.Dispose();
+        }
+
+        public String GetRandomIP()
+        {
+            return new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString() + "."
+                + new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString() + "."
+                  + new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString() + "."
+                    + new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString();
+        }
+    }
+}

binding/c#/IP2Region.Test.xUnit/IP2Region.Test.xUnit.csproj

@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.0" />
+    <PackageReference Include="xunit" Version="2.3.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
+    <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\IP2Region\IP2Region.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="DB\ip2region.db">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

binding/c#/IP2Region.Test.xUnit/SearchTest.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace IP2Region.Test.xUnit
+{
+    public class SearchTest : IDisposable
+    {
+        private readonly DbSearcher _search;
+        
+        public SearchTest()
+        {
+            _search = new DbSearcher(Environment.CurrentDirectory + @"\DB\ip2region.db");
+        }
+        [Fact]
+        public void Search_Test()
+        {
+            string memResult = _search.MemorySearch("183.192.62.65").Region;
+            string binarySearchResult = _search.BinarySearch("183.192.62.65").Region;
+            string binaryTreeSearchResult = _search.BtreeSearch("183.192.62.65").Region;
+
+            Assert.NotNull(memResult);
+            Assert.NotNull(binarySearchResult);
+            Assert.NotNull(binaryTreeSearchResult);
+
+            Assert.Equal(memResult, binarySearchResult);
+            Assert.Equal(binaryTreeSearchResult, memResult);
+        }
+
+        [Fact]
+        public async Task SearchAsync_Test()
+        {
+            // We don't need the synchronizeContext, so just set to false
+            var memResult = await _search.MemorySearchAsync("183.192.62.65").ConfigureAwait(false);
+            var binarySearchResult = await _search.BinarySearchAsync("183.192.62.65").ConfigureAwait(false);
+            var bTreeSearchResult = await _search.BtreeSearchAsync("183.192.62.65").ConfigureAwait(false);
+
+            Assert.NotNull(memResult.Region);
+            Assert.NotNull(binarySearchResult.Region);
+            Assert.NotNull(bTreeSearchResult.Region);
+
+            Assert.Equal(memResult.Region, binarySearchResult.Region);
+            Assert.Equal(bTreeSearchResult.Region, memResult.Region);
+        }
+
+        public void Dispose()
+        {
+            _search.Dispose();
+        }
+    }
+}

binding/c#/IP2Region/DBSearcher.cs

@@ -0,0 +1,412 @@
+//*******************************
+// Created By Rocher Kong 
+// Github https://github.com/RocherKong
+// Date 2018.02.09
+//*******************************
+
+using IP2Region.Models;
+using System;
+using System.IO;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace IP2Region
+{
+    public class DbSearcher : IDisposable
+    {
+        const int BTREE_ALGORITHM = 1;
+        const int BINARY_ALGORITHM = 2;
+        const int MEMORY_ALGORITYM = 3;
+
+        private DbConfig _dbConfig = null;
+
+        /// <summary>
+        /// db file access handler
+        /// </summary>
+        private Stream _raf = null;
+
+        /// <summary>
+        /// header blocks buffer
+        /// </summary>
+        private long[] _headerSip = null;
+        private int[] _headerPtr = null;
+        private int _headerLength;
+
+        /// <summary>
+        /// super blocks info 
+        /// </summary>
+        private long _firstIndexPtr = 0;
+        private long _lastIndexPtr = 0;
+        private int _totalIndexBlocks = 0;
+
+        /// <summary>
+        /// for memory mode
+        /// the original db binary string
+        /// </summary>
+        private byte[] _dbBinStr = null;
+
+        /// <summary>
+        /// Get by index ptr.
+        /// </summary>
+        private DataBlock GetByIndexPtr(long ptr)
+        {
+            _raf.Seek(ptr, SeekOrigin.Begin);
+            byte[] buffer = new byte[12];
+            _raf.Read(buffer, 0, buffer.Length);
+            long extra = Utils.GetIntLong(buffer, 8);
+            int dataLen = (int)((extra >> 24) & 0xFF);
+            int dataPtr = (int)((extra & 0x00FFFFFF));
+            _raf.Seek(dataPtr, SeekOrigin.Begin);
+            byte[] data = new byte[dataLen];
+            _raf.Read(data, 0, data.Length);
+            int city_id = (int)Utils.GetIntLong(data, 0);
+            string region = Encoding.UTF8.GetString(data, 4, data.Length - 4);
+            return new DataBlock(city_id, region, dataPtr);
+        }
+
+        public DbSearcher(DbConfig dbConfig, string dbFile)
+        {
+            if (_dbConfig == null)
+            {
+                _dbConfig = dbConfig;
+            }
+            _raf = new FileStream(dbFile, FileMode.Open, FileAccess.Read, FileShare.Read);
+        }
+
+        public DbSearcher(string dbFile) : this(null, dbFile) { }
+
+        public DbSearcher(DbConfig dbConfig, Stream dbFileStream)
+        {
+            if (_dbConfig == null)
+            {
+                _dbConfig = dbConfig;
+            }
+
+            _raf = dbFileStream;
+        }
+
+        public DbSearcher(Stream dbFileStream) : this(null, dbFileStream) { }
+
+        #region Sync Methods
+        /// <summary>
+        /// Get the region with a int ip address with memory binary search algorithm.
+        /// </summary>
+        private DataBlock MemorySearch(long ip)
+        {
+            int blen = IndexBlock.LENGTH;
+            if (_dbBinStr == null)
+            {
+                _dbBinStr = new byte[(int)_raf.Length];
+                _raf.Seek(0L, SeekOrigin.Begin);
+                _raf.Read(_dbBinStr, 0, _dbBinStr.Length);
+
+                //initialize the global vars
+                _firstIndexPtr = Utils.GetIntLong(_dbBinStr, 0);
+                _lastIndexPtr = Utils.GetIntLong(_dbBinStr, 4);
+                _totalIndexBlocks = (int)((_lastIndexPtr - _firstIndexPtr) / blen) + 1;
+            }
+
+            //search the index blocks to define the data
+            int l = 0, h = _totalIndexBlocks;
+            long sip = 0;
+
+            while (l <= h)
+            {
+                int m = (l + h) >> 1;
+                int p = (int)(_firstIndexPtr + m * blen);
+
+                sip = Utils.GetIntLong(_dbBinStr, p);
+
+                if (ip < sip)
+                {
+                    h = m - 1;
+                }
+                else
+                {
+                    sip = Utils.GetIntLong(_dbBinStr, p + 4);
+                    if (ip > sip)
+                    {
+                        l = m + 1;
+                    }
+                    else
+                    {
+                        sip = Utils.GetIntLong(_dbBinStr, p + 8);
+                        break;
+                    }
+                }
+            }
+
+            //not matched
+            if (sip == 0) return null;
+
+            //get the data
+            int dataLen = (int)((sip >> 24) & 0xFF);
+            int dataPtr = (int)((sip & 0x00FFFFFF));
+            int city_id = (int)Utils.GetIntLong(_dbBinStr, dataPtr);
+            string region = Encoding.UTF8.GetString(_dbBinStr, dataPtr + 4, dataLen - 4);//new String(dbBinStr, dataPtr + 4, dataLen - 4, Encoding.UTF8);
+
+            return new DataBlock(city_id, region, dataPtr);
+        }
+
+        /// <summary>
+        /// Get the region throught the ip address with memory binary search algorithm.
+        /// </summary>
+        public DataBlock MemorySearch(string ip)
+        {
+            return MemorySearch(Utils.Ip2long(ip));
+        }
+
+        /// <summary>
+        /// Get the region with a int ip address with b-tree algorithm.
+        /// </summary>
+        private DataBlock BtreeSearch(long ip)
+        {
+            //check and load the header
+            if (_headerSip == null)
+            {
+                _raf.Seek(8L, SeekOrigin.Begin);    //pass the super block
+                byte[] b = new byte[4096];
+                _raf.Read(b, 0, b.Length);
+                //fill the header
+                int len = b.Length >> 3, idx = 0;  //b.lenght / 8
+                _headerSip = new long[len];
+                _headerPtr = new int[len];
+                long startIp, dataPtrTemp;
+                for (int i = 0; i < b.Length; i += 8)
+                {
+                    startIp = Utils.GetIntLong(b, i);
+                    dataPtrTemp = Utils.GetIntLong(b, i + 4);
+                    if (dataPtrTemp == 0) break;
+
+                    _headerSip[idx] = startIp;
+                    _headerPtr[idx] = (int)dataPtrTemp;
+                    idx++;
+                }
+                _headerLength = idx;
+            }
+
+            //1. define the index block with the binary search
+            if (ip == _headerSip[0])
+            {
+                return GetByIndexPtr(_headerPtr[0]);
+            }
+            else if (ip == _headerPtr[_headerLength - 1])
+            {
+                return GetByIndexPtr(_headerPtr[_headerLength - 1]);
+            }
+            int l = 0, h = _headerLength, sptr = 0, eptr = 0;
+            int m = 0;
+            while (l <= h)
+            {
+                m = (l + h) >> 1;
+                //perfectly matched, just return it
+                if (ip == _headerSip[m])
+                {
+                    if (m > 0)
+                    {
+                        sptr = _headerPtr[m - 1];
+                        eptr = _headerPtr[m];
+                    }
+                    else
+                    {
+                        sptr = _headerPtr[m];
+                        eptr = _headerPtr[m + 1];
+                    }
+                }
+                //less then the middle value
+                else if (ip < _headerSip[m])
+                {
+                    if (m == 0)
+                    {
+                        sptr = _headerPtr[m];
+                        eptr = _headerPtr[m + 1];
+                        break;
+                    }
+                    else if (ip > _headerSip[m - 1])
+                    {
+                        sptr = _headerPtr[m - 1];
+                        eptr = _headerPtr[m];
+                        break;
+                    }
+                    h = m - 1;
+                }
+                else
+                {
+                    if (m == _headerLength - 1)
+                    {
+                        sptr = _headerPtr[m - 1];
+                        eptr = _headerPtr[m];
+                        break;
+                    }
+                    else if (ip <= _headerSip[m + 1])
+                    {
+                        sptr = _headerPtr[m];
+                        eptr = _headerPtr[m + 1];
+                        break;
+                    }
+                    l = m + 1;
+                }
+            }
+            //match nothing just stop it
+            if (sptr == 0) return null;
+            //2. search the index blocks to define the data
+            int blockLen = eptr - sptr, blen = IndexBlock.LENGTH;
+            byte[] iBuffer = new byte[blockLen + blen];    //include the right border block
+            _raf.Seek(sptr, SeekOrigin.Begin);
+            _raf.Read(iBuffer, 0, iBuffer.Length);
+            l = 0; h = blockLen / blen;
+            long sip = 0;
+            int p = 0;
+            while (l <= h)
+            {
+                m = (l + h) >> 1;
+                p = m * blen;
+                sip = Utils.GetIntLong(iBuffer, p);
+                if (ip < sip)
+                {
+                    h = m - 1;
+                }
+                else
+                {
+                    sip = Utils.GetIntLong(iBuffer, p + 4);
+                    if (ip > sip)
+                    {
+                        l = m + 1;
+                    }
+                    else
+                    {
+                        sip = Utils.GetIntLong(iBuffer, p + 8);
+                        break;
+                    }
+                }
+            }
+            //not matched
+            if (sip == 0) return null;
+            //3. get the data
+            int dataLen = (int)((sip >> 24) & 0xFF);
+            int dataPtr = (int)((sip & 0x00FFFFFF));
+            _raf.Seek(dataPtr, SeekOrigin.Begin);
+            byte[] data = new byte[dataLen];
+            _raf.Read(data, 0, data.Length);
+            int city_id = (int)Utils.GetIntLong(data, 0);
+            String region = Encoding.UTF8.GetString(data, 4, data.Length - 4);// new String(data, 4, data.Length - 4, "UTF-8");
+            return new DataBlock(city_id, region, dataPtr);
+        }
+
+        /// <summary>
+        /// Get the region throught the ip address with b-tree search algorithm.
+        /// </summary>
+        public DataBlock BtreeSearch(string ip)
+        {
+            return BtreeSearch(Utils.Ip2long(ip));
+        }
+
+        /// <summary>
+        /// Get the region with a int ip address with binary search algorithm.
+        /// </summary>
+        private DataBlock BinarySearch(long ip)
+        {
+            int blen = IndexBlock.LENGTH;
+            if (_totalIndexBlocks == 0)
+            {
+                _raf.Seek(0L, SeekOrigin.Begin);
+                byte[] superBytes = new byte[8];
+                _raf.Read(superBytes, 0, superBytes.Length);
+                //initialize the global vars
+                _firstIndexPtr = Utils.GetIntLong(superBytes, 0);
+                _lastIndexPtr = Utils.GetIntLong(superBytes, 4);
+                _totalIndexBlocks = (int)((_lastIndexPtr - _firstIndexPtr) / blen) + 1;
+            }
+
+            //search the index blocks to define the data
+            int l = 0, h = _totalIndexBlocks;
+            byte[] buffer = new byte[blen];
+            long sip = 0;
+            while (l <= h)
+            {
+                int m = (l + h) >> 1;
+                _raf.Seek(_firstIndexPtr + m * blen, SeekOrigin.Begin);    //set the file pointer
+                _raf.Read(buffer, 0, buffer.Length);
+                sip = Utils.GetIntLong(buffer, 0);
+                if (ip < sip)
+                {
+                    h = m - 1;
+                }
+                else
+                {
+                    sip = Utils.GetIntLong(buffer, 4);
+                    if (ip > sip)
+                    {
+                        l = m + 1;
+                    }
+                    else
+                    {
+                        sip = Utils.GetIntLong(buffer, 8);
+                        break;
+                    }
+                }
+            }
+            //not matched
+            if (sip == 0) return null;
+            //get the data
+            int dataLen = (int)((sip >> 24) & 0xFF);
+            int dataPtr = (int)((sip & 0x00FFFFFF));
+            _raf.Seek(dataPtr, SeekOrigin.Begin);
+            byte[] data = new byte[dataLen];
+            _raf.Read(data, 0, data.Length);
+            int city_id = (int)Utils.GetIntLong(data, 0);
+            String region = Encoding.UTF8.GetString(data, 4, data.Length - 4);//new String(data, 4, data.Length - 4, "UTF-8");
+            return new DataBlock(city_id, region, dataPtr);
+        }
+
+        /// <summary>
+        /// Get the region throught the ip address with binary search algorithm.
+        /// </summary>
+        public DataBlock BinarySearch(String ip)
+        {
+            return BinarySearch(Utils.Ip2long(ip));
+        }
+        #endregion
+
+        #region Async Methods
+        /// <summary>
+        /// Get the region throught the ip address with memory binary search algorithm.
+        /// </summary>
+        public Task<DataBlock> MemorySearchAsync(string ip)
+        {
+            return Task.FromResult(MemorySearch(ip));
+        }
+        /// <summary>
+        /// Get the region throught the ip address with b-tree search algorithm.
+        /// </summary>
+        public Task<DataBlock> BtreeSearchAsync(string ip)
+        {
+            return Task.FromResult(BtreeSearch(ip));
+        }
+        /// <summary>
+        /// Get the region throught the ip address with binary search algorithm.
+        /// </summary>
+        public Task<DataBlock> BinarySearchAsync(string ip)
+        {
+            return Task.FromResult(BinarySearch(ip));
+        }
+        #endregion
+
+        /// <summary>
+        /// Close the db.
+        /// </summary>
+        public void Close()
+        {
+            _headerSip = null;
+            _headerPtr = null;
+            _dbBinStr = null;
+            _raf.Close();
+        }
+
+        public void Dispose()
+        {
+            Close();
+        }
+    }
+
+}

binding/c#/IP2Region/IP2Region.csproj

@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>netstandard2.0;net46;net45;net47</TargetFrameworks>
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <Authors>Rocher</Authors>
+    <Company>Rocher</Company>
+    <Description>准确率99.9%的ip地址定位库，0.0x毫秒级查询, 支持Binary,B树,内存三种查询算法，妈妈再也不用担心我的ip地址定位！</Description>
+    <PackageReleaseNotes>ip2region - 最自由的ip地址查询库，ip到地区的映射库，提供Binary,B树和纯内存三种查询算法，妈妈再也不用担心我的ip地址定位。</PackageReleaseNotes>
+    <Copyright>Rocher</Copyright>
+    <PackageTags>ip2region c# IP</PackageTags>
+    <RepositoryUrl>https://gitee.com/rocherkong/IP2Region</RepositoryUrl>
+    <Version>1.2.0</Version>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|netstandard2.0|AnyCPU'">
+    <LangVersion>7</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Update="DB\ip2region.db">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

binding/c#/IP2Region/Models/DataBlock.cs

@@ -0,0 +1,50 @@
+//*******************************
+// Created By Rocher Kong 
+// Github https://github.com/RocherKong
+// Date 2018.02.09
+//*******************************
+namespace IP2Region.Models
+{
+    public class DataBlock
+    {
+        #region Private Properties
+        public int CityID
+        {
+            get;
+            private set;
+        }
+
+        public string Region
+        {
+            get;
+            private set;
+        }
+
+        public int DataPtr
+        {
+            get;
+            private set;
+        }
+        #endregion
+
+        #region Constructor
+        public DataBlock(int city_id, string region, int dataPtr = 0)
+        {
+            CityID = city_id;
+            Region = region;
+            DataPtr = dataPtr;
+        }
+
+        public DataBlock(int city_id, string region):this(city_id,region,0)
+        {
+        }
+        #endregion
+
+        public override string ToString()
+        {
+            return $"{CityID}|{Region}|{DataPtr}";
+        }
+
+    }
+
+}

binding/c#/IP2Region/Models/DbConfig.cs

@@ -0,0 +1,49 @@
+//*******************************
+// Created By Rocher Kong 
+// Github https://github.com/RocherKong
+// Date 2018.02.09
+//*******************************
+using System;
+
+namespace IP2Region.Models
+{
+    public class DbMakerConfigException : Exception
+    {
+        public string ErrMsg { get; private set; }
+        public DbMakerConfigException(string errMsg)
+        {
+            ErrMsg = errMsg;
+        }
+    }
+
+    public class DbConfig
+    {
+        public int TotalHeaderSize
+        {
+            get;
+            private set;
+        }
+
+        public int indexBlockSize
+        {
+            get;
+            private set;
+        }
+
+        public DbConfig(int totalHeaderSize)
+        {
+            if ((totalHeaderSize % 8) != 0)
+            {
+                throw new DbMakerConfigException("totalHeaderSize must be times of 8");
+            }
+            TotalHeaderSize = totalHeaderSize;
+            //4 * 2048
+            indexBlockSize = 8192; 
+        }
+
+        public DbConfig():this(8 * 2048)
+        {
+        }
+    }
+
+}

binding/c#/IP2Region/Models/HeaderBlock.cs

@@ -0,0 +1,49 @@
+//*******************************
+// Created By Rocher Kong 
+// Github https://github.com/RocherKong
+// Date 2018.02.09
+//*******************************
+
+namespace IP2Region.Models
+{
+    internal class HeaderBlock
+    {
+        public long IndexStartIp
+        {
+            get;
+            private set;
+        }
+
+        public int IndexPtr
+        {
+            get;
+            private set;
+        }
+
+        public HeaderBlock(long indexStartIp, int indexPtr)
+        {
+            IndexStartIp = indexStartIp;
+            IndexPtr = indexPtr;
+        }
+
+        /// <summary>
+        /// Get the bytes for total storage
+        /// </summary>
+        /// <returns>
+        /// Bytes gotten.
+        /// </returns>
+        public byte[] GetBytes()
+        {
+            /*
+             * +------------+-----------+
+             * | 4bytes     | 4bytes    |
+             * +------------+-----------+
+             *  start ip      index ptr
+            */
+            byte[] b = new byte[8];
+            Utils.WriteIntLong(b, 0, IndexStartIp);
+            Utils.WriteIntLong(b, 4, IndexPtr);
+            return b;
+        }
+    }
+}

binding/c#/IP2Region/Models/IndexBlock.cs

@@ -0,0 +1,65 @@
+//*******************************
+// Created By Rocher Kong 
+// Github https://github.com/RocherKong
+// Date 2018.02.09
+//*******************************
+
+namespace IP2Region
+{
+    internal class IndexBlock
+    {
+        public const int LENGTH = 12;
+
+        public long StartIP
+        {
+            get;
+            private set;
+        }
+
+        public long EndIp
+        {
+            get;
+            private set;
+        }
+
+        public uint DataPtr
+        {
+            get;
+            private set;
+        }
+
+        public int DataLen
+        {
+            get;
+            private set;
+        }
+
+        public IndexBlock(long startIp, long endIp, uint dataPtr, int dataLen)
+        {
+            StartIP = startIp;
+            EndIp = endIp;
+            DataPtr = dataPtr;
+            DataLen = dataLen;
+        }
+
+        public byte[] GetBytes()
+        {
+            /*
+             * +------------+-----------+-----------+
+             * | 4bytes     | 4bytes    | 4bytes    |
+             * +------------+-----------+-----------+
+             *  start ip      end ip      data ptr + len 
+            */
+            byte[] b = new byte[12];
+
+            Utils.WriteIntLong(b, 0, StartIP);    //start ip
+            Utils.WriteIntLong(b, 4, EndIp);        //end ip
+
+            //write the data ptr and the length
+            long mix = DataPtr | ((DataLen << 24) & 0xFF000000L);
+            Utils.WriteIntLong(b, 8, mix);
+
+            return b;
+        }
+    }
+}

binding/c#/IP2Region/Utils.cs

@@ -0,0 +1,122 @@
+//*******************************
+// Created By Rocher Kong 
+// Github https://github.com/RocherKong
+// Date 2018.02.09
+//*******************************
+
+using System;
+
+namespace IP2Region
+{
+    public class IPInValidException : Exception
+    {
+        const string ERROR_MSG = "IP Illigel. Please input a valid IP.";
+        public IPInValidException() : base(ERROR_MSG) { }
+    }
+    internal static class Utils
+    {
+        /// <summary>
+        /// Write specfield bytes to a byte array start from offset.
+        /// </summary>
+        public static void Write(byte[] b, int offset, ulong v, int bytes)
+        {
+            for (int i = 0; i < bytes; i++)
+            {
+                b[offset++] = (byte)((v >> (8 * i)) & 0xFF);
+            }
+        }
+
+        /// <summary>
+        /// Write a int to a byte array.
+        /// </summary>
+        public static void WriteIntLong(byte[] b, int offset, long v)
+        {
+            b[offset++] = (byte)((v >> 0) & 0xFF);
+            b[offset++] = (byte)((v >> 8) & 0xFF);
+            b[offset++] = (byte)((v >> 16) & 0xFF);
+            b[offset] = (byte)((v >> 24) & 0xFF);
+        }
+
+        /// <summary>
+        /// Get a int from a byte array start from the specifiled offset.
+        /// </summary>
+        public static long GetIntLong(byte[] b, int offset)
+        {
+            return (
+                ((b[offset++] & 0x000000FFL)) |
+                ((b[offset++] << 8) & 0x0000FF00L) |
+                ((b[offset++] << 16) & 0x00FF0000L) |
+                ((b[offset] << 24) & 0xFF000000L)
+            );
+        }
+
+        /// <summary>
+        /// Get a int from a byte array start from the specifield offset.
+        /// </summary>
+        public static int GetInt3(byte[] b, int offset)
+        {
+            return (
+                (b[offset++] & 0x000000FF) |
+                (b[offset++] & 0x0000FF00) |
+                (b[offset] & 0x00FF0000)
+            );
+        }
+
+        public static int GetInt2(byte[] b, int offset)
+        {
+            return (
+                (b[offset++] & 0x000000FF) |
+                (b[offset] & 0x0000FF00)
+            );
+        }
+
+        public static int GetInt1(byte[] b, int offset)
+        {
+            return (
+                (b[offset] & 0x000000FF)
+            );
+        }
+        /// <summary>
+        /// String ip to long ip.
+        /// </summary>
+        public static long Ip2long(string ip)
+        {
+            string[] p = ip.Split('.');
+            if (p.Length != 4) throw new IPInValidException();
+
+            foreach (string pp in p)
+            {
+                if (pp.Length > 3) throw new IPInValidException();
+                if (!int.TryParse(pp, out int value) || value > 255)
+                {
+                    throw new IPInValidException();
+                }
+            }
+            var bip1 = long.TryParse(p[0], out long ip1);
+            var bip2 = long.TryParse(p[1], out long ip2);
+            var bip3 = long.TryParse(p[2], out long ip3);
+            var bip4 = long.TryParse(p[3], out long ip4);
+
+            if (!bip1 || !bip2 || !bip3 || !bip4
+                || ip4 > 255 || ip1 > 255 || ip2 > 255 || ip3 > 255
+                || ip4 < 0 || ip1 < 0 || ip2 < 0 || ip3 < 0)
+            {
+                throw new IPInValidException();
+            }
+            long p1 = ((ip1 << 24) & 0xFF000000);
+            long p2 = ((ip2 << 16) & 0x00FF0000);
+            long p3 = ((ip3 << 8) & 0x0000FF00);
+            long p4 = ((ip4 << 0) & 0x000000FF);
+            return ((p1 | p2 | p3 | p4) & 0xFFFFFFFFL);
+        }
+
+        /// <summary>
+        /// Int to ip string.
+        /// </summary>
+        public static string Long2ip(long ip)
+        {
+            return $"{(ip >> 24) & 0xFF}.{(ip >> 16) & 0xFF}.{(ip >> 8) & 0xFF}.{ip & 0xFF}";
+        }
+    }
+
+}

binding/c#/IP2Region_NetFx_Test/App.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
+    </startup>
+</configuration>

binding/c#/IP2Region_NetFx_Test/IP2Region_NetFx_Test.csproj

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{2D73D7EB-AE36-4039-A839-DA40209052A4}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>IP2Region_NetFx_Test</RootNamespace>
+    <AssemblyName>IP2Region_NetFx_Test</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+    <None Include="DB\ip2region.db">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\IP2Region\IP2Region.csproj">
+      <Project>{a27d09f4-4da8-4925-90ec-43e5f5288630}</Project>
+      <Name>IP2Region</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

binding/c#/IP2Region_NetFx_Test/Program.cs

@@ -0,0 +1,17 @@
+using IP2Region;
+using System;
+
+namespace IP2Region_NetFx_Test
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            using (var _search = new DbSearcher(Environment.CurrentDirectory + @"\DB\ip2region.db"))
+            {
+                Console.WriteLine(_search.MemorySearch("183.192.62.65").Region);
+                Console.Read();
+            }
+        }
+    }
+}

binding/c#/IP2Region_NetFx_Test/Properties/AssemblyInfo.cs

@@ -0,0 +1,35 @@
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+// 有关程序集的一般信息由以下
+// 控制。更改这些特性值可修改
+// 与程序集关联的信息。
+[assembly: AssemblyTitle("IP2Region_NetFx_Test")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("IP2Region_NetFx_Test")]
+[assembly: AssemblyCopyright("Copyright ©  2018")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// 将 ComVisible 设置为 false 会使此程序集中的类型
+//对 COM 组件不可见。如果需要从 COM 访问此程序集中的类型
+//请将此类型的 ComVisible 特性设置为 true。
+[assembly: ComVisible(false)]
+
+// 如果此项目向 COM 公开，则下列 GUID 用于类型库的 ID
+[assembly: Guid("2d73d7eb-ae36-4039-a839-da40209052a4")]
+
+// 程序集的版本信息由下列四个值组成: 
+//
+//      主版本
+//      次版本
+//      生成号
+//      修订号
+//
+// 可以指定所有值，也可以使用以下所示的 "*" 预置版本号和修订号
+// 方法是按如下所示使用“*”: :
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

binding/c#/README.md

@@ -0,0 +1,42 @@
+# IP2Region C# Client
+
+## How To Use
+### 1.Install from Nuget. Support .Net Framework (>=4.5) And netstandard 2.0(.net core)
+```powershell
+Install-Package IP2Region
+```
+### 2.Init DbSearcher with [the newest DBFile](https://github.com/lionsoul2014/ip2region/blob/master/data/ip2region.db) Downloaded into your project, and invoke your search methods as below:
+```csharp
+using (var _search = new DbSearcher(Environment.CurrentDirectory + @"\DB\ip2region.db"))
+{
+    _search.MemorySearch("183.192.62.65").Region;
+    _search.BinarySearch("183.192.62.65").Region;
+    _search.BtreeSearch("183.192.62.65").Region;
+}
+```
+For async methods (Methods with the suffix "Async"), just put them with `async` and `await`.
+If you don't need the `SynchronizedContext`, please use `ConfigureAwait(false)`.
+For more about this, please read https://msdn.microsoft.com/en-us/magazine/jj991977.aspx.
+
+```csharp
+ public async Task SearchAsync_Test()
+        {
+            // We don't need the synchronizeContext, so just set to false. 
+            // So as for BinarySearchAsync and BtreeSearchAsync
+            var memResult = await _search.MemorySearchAsync("183.192.62.65").ConfigureAwait(false);
+        }
+```
+
+## Test Result(From /IP2Region.Test.Benchmark)
+ Method |     Mean |     Error |    StdDev | Rank |
+------------------- |---------: |----------: |----------: |-----: |
+MemorySearch | 10.66 us | 0.1424 us | 0.1332 us |    1 |
+MemorySearch_Async | 10.90 us | 0.2060 us | 0.2023 us |    2 |
+BinarySearch | 52.22 us | 0.6403 us | 0.5347 us |    5 |
+BinarySearch_Async | 53.03 us | 1.0271 us | 0.9608 us |    6 |
+BtreeSearch | 19.05 us | 0.2464 us | 0.2305 us |    3 |
+BtreeSearch_Async | 19.40 us | 0.3820 us | 0.6690 us |    4 |
+
+
+Because the speed of the program lookup has been fast, the asynchronous method here is just the packaging of the synchronization method, the essence is the synchronization method, the asynchronous method is not recommended, and asynchronous will bring the performance loss, unless you need the asynchronous call format.
+

binding/c/Makefile

@@ -0,0 +1,26 @@
+A = @
+CFLAGS=	-g
+CC=		gcc
+LIBS= -I./
+LDFLAGS=
+RM = rm -f
+MV = mv
+
+testSearcher: ip2region.o
+	$(A) $(CC) $(CFLAGS) $(LDFLAGS) $(LIBS) -o testSearcher testSearcher.c ip2region.c
+	$(A) $(RM) ip2region.o testSearcher.o
+
+db:
+	$(A) cd ../../;\
+	export LANG=en_US.UTF-8;\
+	java -jar dbMaker-1.2.2.jar -src ./data/ip.merge.txt -region ./data/global_region.csv -dst .;\
+	$(MV) ./ip2region.db ./binding/c/;\
+	cd ./binding/c
+
+all: db testSearcher
+
+
+clean:
+	$(A) $(RM) testSearcher
+	
+.PHONY: all clean testSearcher db

binding/c/ip2region.c

@@ -15,7 +15,7 @@
  *
  * @param   dbFile path
 */
-IP2R_API uint_t ip2region_create(ip2region_t ip2rObj, char *dbFile)
+IP2R_API uint_t ip2region_create(ip2region_t ip2rObj, const char *dbFile)
 {
     memset(ip2rObj, 0x00, sizeof(ip2region_entry));
     ip2rObj->headerLen = 0;
@@ -55,10 +55,15 @@ IP2R_API uint_t ip2region_create(ip2region_t ip2rObj, char *dbFile)
 */
 IP2R_API uint_t ip2region_destroy(ip2region_t ip2rObj)
 {
+    if ( ip2rObj->HeaderSip != NULL ) {
         IP2R_FREE(ip2rObj->HeaderSip);
         ip2rObj->HeaderSip = NULL;
+    }
+
+    if ( ip2rObj->HeaderPtr != NULL ) {
         IP2R_FREE(ip2rObj->HeaderPtr);
         ip2rObj->HeaderPtr = NULL;
+    }
 
     // close the db file resource
     if ( ip2rObj->dbHandler != NULL ) {
@@ -149,7 +154,7 @@ IP2R_API uint_t ip2region_memory_search(ip2region_t ip2rObj, uint_t ip, databloc
     return 1;
 }
 
-IP2R_API uint_t ip2region_memory_search_string(ip2region_t ip2rObj, char *ip, datablock_t datablock)
+IP2R_API uint_t ip2region_memory_search_string(ip2region_t ip2rObj, const char *ip, datablock_t datablock)
 {
     return ip2region_memory_search(ip2rObj, ip2long(ip), datablock);
 }
@@ -226,7 +231,7 @@ IP2R_API uint_t ip2region_binary_search(ip2region_t ip2rObj, uint_t ip, databloc
     return 1;
 }
 
-IP2R_API uint_t ip2region_binary_search_string(ip2region_t ip2rObj, char *ip, datablock_t datablock)
+IP2R_API uint_t ip2region_binary_search_string(ip2region_t ip2rObj, const char *ip, datablock_t datablock)
 {
     return ip2region_binary_search(ip2rObj, ip2long(ip), datablock);
 }
@@ -355,7 +360,7 @@ IP2R_API uint_t ip2region_btree_search(ip2region_t ip2rObj, uint_t ip, datablock
     return 1;
 }
 
-IP2R_API uint_t ip2region_btree_search_string(ip2region_t ip2rObj, char *ip, datablock_t datablock)
+IP2R_API uint_t ip2region_btree_search_string(ip2region_t ip2rObj, const char *ip, datablock_t datablock)
 {
     return ip2region_btree_search(ip2rObj, ip2long(ip), datablock);
 }
@@ -367,7 +372,7 @@ IP2R_API uint_t ip2region_btree_search_string(ip2region_t ip2rObj, char *ip, dat
  * @param   offset
  * @return  uint_t
 */
-IP2R_API uint_t getUnsignedInt(char *buffer, int offset)
+IP2R_API uint_t getUnsignedInt(const char *buffer, int offset)
 {
     return (
         ((buffer[offset  ]) & 0x000000FF) | 
@@ -383,13 +388,19 @@ IP2R_API uint_t getUnsignedInt(char *buffer, int offset)
  * @param   ip
  * @return  uint_t
 */
-IP2R_API uint_t ip2long(char *ip)
+IP2R_API uint_t ip2long(const char *ip)
 {
     int i = 0, p = 24;
-    char buffer[4], *cs = ip;
+    char buffer[4];
+    const char *cs = ip;
     uint_t ipval = 0;
 
     while ( *cs != '\0' ) {
+        if ( *cs == ' ' ) {
+            cs++;
+            continue;
+        }
+
         if ( *cs == '.' ) {
             //single part length limit
             if ( i > 3 ) {

binding/c/ip2region.h

@@ -43,7 +43,9 @@ typedef unsigned int uint_t;
 typedef unsigned long ulong_t;
 
 #define INDEX_BLOCK_LENGTH 12
-#define TOTAL_HEADER_LENGTH 4096
+
+//thats 8 * 1024
+#define TOTAL_HEADER_LENGTH 8192
 
 /*
  * ip2region properties struct
@@ -78,7 +80,7 @@ typedef datablock_entry * datablock_t;
  * @param	ip2rObj
  * @param	dbFile path
 */
-IP2R_API uint_t ip2region_create(ip2region_t, char *);
+IP2R_API uint_t ip2region_create(ip2region_t, const char *);
 
 /**
  * destroy the specified ip2region object
@@ -96,7 +98,7 @@ IP2R_API uint_t ip2region_destroy(ip2region_t);
  * @date    2016/06/30
 */
 IP2R_API uint_t ip2region_memory_search(ip2region_t, uint_t, datablock_t);
-IP2R_API uint_t ip2region_memory_search_string(ip2region_t, char *, datablock_t);
+IP2R_API uint_t ip2region_memory_search_string(ip2region_t, const char *, datablock_t);
 
 
 /**
@@ -108,7 +110,7 @@ IP2R_API uint_t ip2region_memory_search_string(ip2region_t, char *, datablock_t)
  * @return	uint_t
 */
 IP2R_API uint_t ip2region_binary_search(ip2region_t, uint_t, datablock_t);
-IP2R_API uint_t ip2region_binary_search_string(ip2region_t, char *, datablock_t);
+IP2R_API uint_t ip2region_binary_search_string(ip2region_t, const char *, datablock_t);
 
 /**
  * get the region associated with the specified ip address with b-tree algorithm
@@ -119,7 +121,7 @@ IP2R_API uint_t ip2region_binary_search_string(ip2region_t, char *, datablock_t)
  * @return	uint_t
 */
 IP2R_API uint_t ip2region_btree_search(ip2region_t, uint_t, datablock_t);
-IP2R_API uint_t ip2region_btree_search_string(ip2region_t, char *, datablock_t);
+IP2R_API uint_t ip2region_btree_search_string(ip2region_t, const char *, datablock_t);
 
 /**
  * get a unsinged long(4bytes) from a specified buffer start from the specified offset
@@ -128,7 +130,7 @@ IP2R_API uint_t ip2region_btree_search_string(ip2region_t, char *, datablock_t);
  * @param	offset
  * @return	uint_t
 */
-IP2R_API uint_t getUnsignedInt(char *, int);
+IP2R_API uint_t getUnsignedInt(const char *, int);
 
 /**
  * string ip to long
@@ -136,7 +138,7 @@ IP2R_API uint_t getUnsignedInt(char *, int);
  * @param	ip
  * @return	uint_t
 */
-IP2R_API uint_t ip2long(char *);
+IP2R_API uint_t ip2long(const char *);
 
 /**
  * long to string ip

binding/c/testSearcher.c

@@ -49,7 +49,7 @@ int main( int argc, char **argv )
     datablock_entry datablock;
     char *dbFile = NULL, *algorithm = NULL;
     char line[256];
-    uint_t (*func_ptr)(ip2region_t, char *, datablock_t);
+    uint_t (*func_ptr)(ip2region_t, const char *, datablock_t);
     double s_time, c_time;
     memset(&datablock, 0x00, sizeof(datablock_entry));
 

binding/c_mmap/ip2region.c

@@ -0,0 +1,328 @@
+/**
+ * ip2region implementation with mmap support created by Leo Ma
+ *
+ * @see     #ip2region.h
+ * @author  chenxin<chenxin619315@gmail.com>
+ * @author  Leo Ma<http://git.oschina.net/begeekmyfriend>
+ * @date    2017/01/12
+*/
+
+#include "ip2region.h"
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+/**
+ * create a new ip2region object
+ *
+ * @param   dbFile path
+*/
+IP2R_API uint_t ip2region_create(ip2region_t ip2rObj, char *dbFile)
+{
+    struct stat st;
+
+    memset(ip2rObj, 0x00, sizeof(ip2region_entry));
+    ip2rObj->dbFile = IP2R_MALLOC(1024);
+    strcpy(ip2rObj->dbFile, dbFile);
+
+    int fd = open(dbFile, O_RDONLY);
+    if ( fd < 0 ) {
+        //fprintf(stderr, "Fail to open the db file %s\n", ip2rObj->dbFile);
+        return 0;
+    }
+
+    if ( fstat(fd, &st) < 0 ) {
+        //fprintf(stderr, "Fail to stat the db file %s\n", ip2rObj->dbFile);
+        return 0;
+    }
+
+    ip2rObj->dbSize = st.st_size;
+    ip2rObj->dbBinStr = mmap(NULL, ip2rObj->dbSize, PROT_READ, MAP_PRIVATE, fd, 0);
+    if ( ip2rObj->dbBinStr == (void *) -1 ) {
+        //fprintf(stderr, "Fail to map the db file %s\n", ip2rObj->dbFile);
+        return 0;
+    }
+
+    // Close db file as soon as possible.
+    close(fd);
+
+    ip2rObj->headerLen = 0;
+    ip2rObj->HeaderSip = (uint_t *) IP2R_MALLOC(TOTAL_HEADER_LENGTH);
+    if ( ip2rObj->HeaderSip == NULL ) {
+        return 0;
+    }
+
+    ip2rObj->HeaderPtr = (uint_t *) IP2R_MALLOC(TOTAL_HEADER_LENGTH);
+    if ( ip2rObj->HeaderPtr == NULL ) {
+        IP2R_FREE(ip2rObj->HeaderSip);
+        return 0;
+    }
+
+    ip2rObj->firstIndexPtr = getUnsignedInt(ip2rObj->dbBinStr, 0);
+    ip2rObj->lastIndexPtr  = getUnsignedInt(ip2rObj->dbBinStr, 4);
+    ip2rObj->totalBlocks   = (ip2rObj->lastIndexPtr-ip2rObj->firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
+
+    return 1;
+}
+
+/**
+ * destroy the specifield ip2region object
+ *
+ * @param    ip2region_t
+*/
+IP2R_API uint_t ip2region_destroy(ip2region_t ip2rObj)
+{
+    IP2R_FREE(ip2rObj->dbFile);
+    IP2R_FREE(ip2rObj->HeaderSip);
+    IP2R_FREE(ip2rObj->HeaderPtr);
+
+    //free the db binary string
+    if ( ip2rObj->dbBinStr != NULL ) {
+        munmap(ip2rObj->dbBinStr, ip2rObj->dbSize);
+    }
+
+    memset(ip2rObj, 0x00, sizeof(ip2region_entry));
+
+    return 1;
+}
+
+/**
+ * get the region associated with the specified ip address with the memory binary search algorithm
+ *
+ * @param   ip2rObj
+ * @param   ip
+ * @param   datablock
+*/
+IP2R_API uint_t ip2region_binary_search(ip2region_t ip2rObj, uint_t ip, datablock_t datablock) 
+{
+    int l, h, m, p;
+    uint_t sip, eip, dptr;
+    int dataLen, dataptr;
+    char *buffer;
+
+    l = 0; h = ip2rObj->totalBlocks; dptr = 0;
+    while ( l <= h ) {
+        m = (l + h) >> 1;
+        p = ip2rObj->firstIndexPtr + m * INDEX_BLOCK_LENGTH;
+
+        buffer = ip2rObj->dbBinStr + p;
+        sip    = getUnsignedInt(buffer, 0);
+        if ( ip < sip ) {
+            h = m - 1;
+        } else {
+            eip = getUnsignedInt(buffer, 4);
+            if ( ip > eip ) {
+                l = m + 1;
+            } else {
+                dptr = getUnsignedInt(buffer, 8);
+                break;
+            }
+        }
+    }
+
+    if ( dptr == 0 ) return 0;
+
+    //get the data
+    dataLen = ((dptr >> 24) & 0xFF);
+    dataptr = (dptr & 0x00FFFFFF);
+    buffer  = ip2rObj->dbBinStr + dataptr;
+
+    //fill the data to the datablock
+    datablock->city_id = getUnsignedInt(buffer, 0);
+    dataLen -= 4;    //reduce the length of the city_id
+    memcpy(datablock->region, buffer + 4, dataLen); 
+    datablock->region[dataLen] = '\0';
+
+    return 1;
+}
+
+IP2R_API uint_t ip2region_binary_search_string(ip2region_t ip2rObj, char *ip, datablock_t datablock)
+{
+    return ip2region_binary_search(ip2rObj, ip2long(ip), datablock);
+}
+
+/**
+ * get the region associated with the specifield ip address with b-tree algorithm
+ *
+ * @param    ip2rObj
+ * @param    ip
+ * @param    datablock
+ * @return    uint_t
+*/
+IP2R_API uint_t ip2region_btree_search(ip2region_t ip2rObj, uint_t ip, datablock_t datablock)
+{
+    int i, j;
+    int l, m, h, p, sptr, eptr, indexBlockLen, dataLen, dataptr;
+    uint_t sip, eip, idxptr, dptr;
+    char *buffer;
+
+    if ( ip2rObj->headerLen == 0 ) {
+        buffer = ip2rObj->dbBinStr + 8;
+        for ( i = j = 0; i < TOTAL_HEADER_LENGTH; i += 8, j++ ) {
+            sip    = getUnsignedInt(buffer, i);
+            idxptr = getUnsignedInt(buffer, i + 4);
+            if ( idxptr == 0 ) break;
+
+            ip2rObj->HeaderSip[j] = sip;
+            ip2rObj->HeaderPtr[j] = idxptr;
+        }
+
+        ip2rObj->headerLen = j;
+    }
+
+    //search the header block to define the index block
+    l = 0; h = ip2rObj->headerLen; sptr = 0; eptr = 0;
+    while ( l <= h ) {
+        m = ((l + h) >> 1);
+
+        //perfetc matched, just return it
+        if ( ip == ip2rObj->HeaderSip[m] ) {
+            if ( m > 0 ) {
+                sptr = ip2rObj->HeaderPtr[m-1];
+                eptr = ip2rObj->HeaderPtr[m  ];
+            } else {
+                sptr = ip2rObj->HeaderPtr[m ];
+                eptr = ip2rObj->HeaderPtr[m+1];
+            }
+
+            break;
+        }
+
+        //less then the middle value
+        if ( ip < ip2rObj->HeaderSip[m] ) {
+            if ( m == 0 ) {
+                sptr = ip2rObj->HeaderPtr[m  ];
+                eptr = ip2rObj->HeaderPtr[m+1];
+                break;
+            } else if ( ip > ip2rObj->HeaderSip[m-1] ) {
+                sptr = ip2rObj->HeaderPtr[m-1];
+                eptr = ip2rObj->HeaderPtr[m  ];
+                break;
+            }
+            h = m - 1;
+        } else {
+            if ( m == ip2rObj->headerLen - 1 ) {
+                sptr = ip2rObj->HeaderPtr[m-1];
+                eptr = ip2rObj->HeaderPtr[m  ];
+                break;
+            } else if ( ip <= ip2rObj->HeaderSip[m+1] ) {
+                sptr = ip2rObj->HeaderPtr[m  ];
+                eptr = ip2rObj->HeaderPtr[m+1];
+                break;
+            }
+            l = m + 1;
+        }
+    }
+
+    //not matched just stop it
+    if ( sptr == 0 ) return 0;
+
+    indexBlockLen = eptr - sptr;
+    buffer = ip2rObj->dbBinStr + sptr;
+
+    dptr = 0; l = 0; h = indexBlockLen / INDEX_BLOCK_LENGTH;
+    while ( l <= h ) {
+        m = ((l + h) >> 1);
+        p = m * INDEX_BLOCK_LENGTH;
+        sip = getUnsignedInt(buffer, p);
+        if ( ip < sip ) {
+            h = m - 1;
+        } else {
+            eip = getUnsignedInt(buffer, p + 4);
+            if ( ip > eip ) {
+                l = m + 1;
+            } else {
+                dptr = getUnsignedInt(buffer, p + 8);
+                break;
+            }
+        }
+    }
+
+    if ( dptr == 0 ) return 0;
+
+    dataLen = ((dptr >> 24) & 0xFF);
+    dataptr = (dptr & 0x00FFFFFF);
+    buffer = ip2rObj->dbBinStr + dataptr;
+
+    datablock->city_id = getUnsignedInt(buffer, 0);
+    dataLen -= 4;
+    memcpy(datablock->region, buffer + 4, dataLen);
+    datablock->region[dataLen] = '\0';
+
+    return 1;
+}
+
+IP2R_API uint_t ip2region_btree_search_string(ip2region_t ip2rObj, char *ip, datablock_t datablock)
+{
+    return ip2region_btree_search(ip2rObj, ip2long(ip), datablock);
+}
+
+/**
+ * get a unsinged long(4bytes) from a specifield buffer start from the specifield offset
+ *
+ * @param    buffer
+ * @param    offset
+ * @return    uint_t
+*/
+IP2R_API uint_t getUnsignedInt(char *buffer, int offset)
+{
+    return (
+        ((buffer[offset  ]) & 0x000000FF) | 
+        ((buffer[offset+1] <<  8) & 0x0000FF00) | 
+        ((buffer[offset+2] << 16) & 0x00FF0000) |
+        ((buffer[offset+3] << 24) & 0xFF000000)
+    );
+}
+
+/**
+ * string ip to long
+ *
+ * @param    ip
+ * @return    uint_t
+*/
+IP2R_API uint_t ip2long(char *ip)
+{
+    int i = 0, p = 24;
+    char buffer[4], *cs = ip;
+    uint_t ipval = 0;
+
+    while ( *cs != '\0' ) {
+        if ( *cs == '.' ) {
+            //single part length limit
+            if ( i > 3 ) {
+                ipval = 0;
+                break;
+            }
+
+            if ( p < 0 ) break;
+            buffer[i] = '\0';
+            ipval |= (atoi(buffer) << p);
+            p -= 8;
+            i = 0;
+        } else {
+            buffer[i++] = *cs;
+        }
+
+        cs++;
+    }
+
+    //append the rest parts
+    if ( i > 3 ) return 0;
+    buffer[i] = '\0';
+    ipval |= atoi(buffer);
+
+    return ipval;
+}
+
+/**
+ * long to string ip
+ *
+ * @param    ip
+ * @param    buffer
+ * @return    uint_t(1 for success and 0 for failed)
+*/
+IP2R_API uint_t long2ip(uint_t ip, char *buffer)
+{
+    return 0;
+}

binding/c_mmap/ip2region.h

@@ -0,0 +1,138 @@
+/**
+ * ip2region header file
+ *
+ * @author	chenxin<chenxin619315@gmail.com>
+ * @author  Leo Ma<http://git.oschina.net/begeekmyfriend>
+*/
+
+#ifndef _IP2REGION_H
+#define _IP2REGION_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+//yat, just take it as this way, 99 percent and they works find
+#if ( defined(_WIN32) || defined(_WINDOWS_) || defined(__WINDOWS_) )
+#	define OS_WINDOW
+#else
+#	define OS_LINUX
+#endif
+
+#ifdef OS_WINDOW
+#	define IP2R_API extern __declspec(dllexport)
+#else
+/*platform shared library statement :: unix*/
+#	define IP2R_API extern
+#endif
+
+#define print(str) printf("%s", str)
+#define println(str) printf("%s\n", str)
+
+/*
+ * memory allocation macro definition.
+ * 		cause we should use emalloc,ecalloc .ege. in php.
+ * so you could make it better apdat the php environment.
+ */
+#define IP2R_CALLOC(_bytes, _blocks) calloc(_bytes, _blocks)
+#define IP2R_MALLOC(_bytes) malloc(_bytes)
+#define IP2R_FREE(_ptr) free(_ptr)
+
+typedef unsigned short ushort_t;
+typedef unsigned char uchar_t;
+typedef unsigned int uint_t;
+typedef unsigned long ulong_t;
+
+#define INDEX_BLOCK_LENGTH 12
+#define TOTAL_HEADER_LENGTH 8192
+
+/*
+ * ip2region properties struct
+*/
+typedef struct {
+	uint_t *HeaderSip;		//header start ip blocks
+	uint_t *HeaderPtr;		//header ptr blocks
+	uint_t headerLen;		//header block number
+    char *dbFile;           //path of db file
+    char *dbBinStr;         //db binary string for memory search mode
+    uint_t dbSize;
+	uint_t firstIndexPtr;	//first index ptr
+	uint_t lastIndexPtr;	//last index ptr
+	uint_t totalBlocks;		//total index blocks number
+} ip2region_entry;
+typedef ip2region_entry * ip2region_t;
+
+/*
+ * data block
+*/
+typedef struct {
+	uint_t city_id;
+	char region[256];
+} datablock_entry;
+typedef datablock_entry * datablock_t;
+
+
+/**
+ * create a new ip2region object
+ *
+ * @param	ip2rObj
+ * @param	dbFile path
+*/
+IP2R_API uint_t ip2region_create(ip2region_t, char *);
+
+/**
+ * destroy the specified ip2region object
+ *
+ * @param	ip2region_t
+*/
+IP2R_API uint_t ip2region_destroy(ip2region_t);
+
+/**
+ * get the region associated with the specified ip address with memory binary search algorithm
+ *
+ * @param   ip2region_t
+ * @param   uint_t
+ * @param   datablock_t
+ * @date    2016/06/30
+*/
+IP2R_API uint_t ip2region_binary_search(ip2region_t, uint_t, datablock_t);
+IP2R_API uint_t ip2region_binary_search_string(ip2region_t, char *, datablock_t);
+
+/**
+ * get the region associated with the specified ip address with b-tree algorithm
+ *
+ * @param	ip2rObj
+ * @param	ip
+ * @param	datablock
+ * @return	uint_t
+*/
+IP2R_API uint_t ip2region_btree_search(ip2region_t, uint_t, datablock_t);
+IP2R_API uint_t ip2region_btree_search_string(ip2region_t, char *, datablock_t);
+
+/**
+ * get a unsinged long(4bytes) from a specified buffer start from the specified offset
+ *
+ * @param	buffer
+ * @param	offset
+ * @return	uint_t
+*/
+IP2R_API uint_t getUnsignedInt(char *, int);
+
+/**
+ * string ip to long
+ *
+ * @param	ip
+ * @return	uint_t
+*/
+IP2R_API uint_t ip2long(char *);
+
+/**
+ * long to string ip
+ *
+ * @param	ip
+ * @param	buffer
+ * @return	uint_t(1 for success and 0 for failed)
+*/
+IP2R_API uint_t long2ip(uint_t, char *);
+
+#endif	/*end ifndef*/

binding/c_mmap/testSearcher.c

@@ -0,0 +1,99 @@
+/**
+ * test ip2region searcher program
+ *
+ * @author  chenxin<chenxin619315@gmail.com>
+ * @date    2015-10-30
+*/
+
+#include "ip2region.h"
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/time.h>
+
+#define __PRINT_ABOUT__ \
+    println("+-------------------------------------+");    \
+    println("| ip2region test program              |");    \
+    println("| Author: chenxin619315@gmail.com.    |");    \
+    println("| Type 'quit' to exit the program.    |");    \
+    println("+-------------------------------------+");
+
+//read a line from a command line.
+static char *getLine( FILE *fp, char *__dst ) 
+{
+    register int c;
+    register char *cs;
+
+    cs = __dst;
+    while ( ( c = getc( fp ) ) != EOF ) {
+        if ( c == '\n' ) break;
+        *cs++ = c; 
+    }
+    *cs = '\0';
+
+    return ( c == EOF && cs == __dst ) ? NULL : __dst;
+}
+
+static double getTime()
+{
+    struct timeval tv;
+    struct timezone tz;
+    gettimeofday(&tv, &tz);
+
+    return (tv.tv_sec * 1000 + ((double)tv.tv_usec)/1000);
+}
+
+int main( int argc, char **argv )
+{
+    ip2region_entry ip2rEntry;
+    datablock_entry datablock;
+    char *dbFile = NULL, *algorithm = NULL;
+    char line[256];
+    uint_t (*func_ptr)(ip2region_t, char *, datablock_t);
+    double s_time, c_time;
+    memset(&datablock, 0x00, sizeof(datablock_entry));
+
+    if ( argc < 2  ) {
+        printf("Usage: a.out [ip2region db file path] [algorithm]\n");
+        return 0;
+    }
+
+    dbFile    = argv[1];
+    algorithm = "B-tree";
+    func_ptr  = ip2region_btree_search_string;
+    if ( argc >= 3 ) {
+        if ( strcmp(argv[2], "binary") == 0 ) {
+            algorithm = "File";
+            func_ptr = ip2region_binary_search_string;
+        }
+    }
+
+    //create a new ip2rObj
+    printf("+--initializing %s ... \n", algorithm);
+    if ( ip2region_create(&ip2rEntry, dbFile) == 0 ) {
+        println("Error: Fail to create the ip2region object\n");
+        return 0;
+    }
+
+    __PRINT_ABOUT__;
+
+    while ( 1 ) {
+        print("ip2region>> ");
+        getLine( stdin, line );
+        if ( strlen(line) < 2 ) continue;
+        if ( strcasecmp( line, "quit" ) == 0 ) {
+            println("+--Bye!");
+            break;
+        }
+
+        s_time = getTime();
+        func_ptr(&ip2rEntry, line, &datablock);
+        c_time = getTime() - s_time;
+        printf("%d|%s in %.5f millseconds\n", datablock.city_id, datablock.region, c_time);
+    }
+
+    //destory the ip2rObj
+    ip2region_destroy(&ip2rEntry);
+
+    return 0;
+}

binding/golang/README.md

@@ -3,7 +3,7 @@
 #### 获取
 
 ```
-go get github.com/mohong122/ip2region/binding/golang
+go get github.com/lionsoul2014/ip2region/binding/golang
 ```
 
 
@@ -17,7 +17,7 @@ package main
 
 import (
 	"fmt"
-	"github.com/mohong122/ip2region/binding/golang"
+	"github.com/lionsoul2014/ip2region/binding/golang/ip2region"
 )
 
 func main() {
@@ -64,7 +64,7 @@ BenchmarkBinarySearch-4|    30000   |          42680 ns/op
 ```
 cd /binging/golang
 
-go run main.go ../../data/ip2Region.db
+go run main.go ../../data/ip2region.db
 
 Or
 

binding/golang/ip2region/ip2Region.go

@@ -10,7 +10,7 @@ import (
 
 const (
 	INDEX_BLOCK_LENGTH  = 12
-	TOTAL_HEADER_LENGTH = 4096
+	TOTAL_HEADER_LENGTH = 8192
 )
 
 var err error

binding/golang/main.go

@@ -2,7 +2,7 @@ package main
 
 import (
 	"os"
-	"github.com/mohong122/ip2region/binding/golang"
+	"github.com/lionsoul2014/ip2region/binding/golang/ip2region"
 	"bufio"
 	"fmt"
 	"strings"

binding/java/build.xml

@@ -9,7 +9,7 @@
 		<property name="jars" value="${basedir}"/>
 		<property name="sources" value="${basedir}/src"/>
 		<property name="classes" value="${basedir}/classes"/>
-		<property name="version" value="1.2"/>
+		<property name="version" value="1.4"/>
 		<property name="api" value="${basedir}/doc"/>
 		<mkdir dir="${classes}"/>
 		<mkdir dir="${api}"/>

binding/java/pom.xml

@@ -0,0 +1,190 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.lionsoul</groupId>
+  <artifactId>ip2region</artifactId>
+  <version>1.7.2</version>
+  <packaging>jar</packaging>
+
+  <name>ip2region</name>
+  <url>http://gitee.com/lionsoul/ip2region/</url>
+  <description>Open source internel address locator</description>
+  
+  <licenses>
+    <license>
+      <name>The Apache Software License, Version 2.0</name>
+      <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
+      <distribution>repo</distribution>
+    </license>
+  </licenses>
+  
+  <scm>
+      <url>git@gitee.com:lionsoul/ip2region.git</url>
+      <connection>scm:git:git@gitee.com:lionsoul/ip2region.git</connection>
+      <developerConnection>scm:git:git@gitee.com:lionsoul/ip2region.git</developerConnection>
+  </scm>
+  
+  <developers>
+      <developer>
+          <id>lionsoul</id>
+          <name>chenxin</name>
+          <email>chenxin619315@gmail.com</email>
+      </developer>
+  </developers>
+  
+  <issueManagement>
+      <url>http://gitee.com/lionsoul/ip2region/issues</url>
+      <system>gitee issues</system>
+  </issueManagement>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>3.8.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+  
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-source-plugin</artifactId>
+        <version>2.1.2</version>
+        <executions>
+          <execution>
+            <id>attach-sources</id>
+            <phase>package</phase>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      
+      <plugin>          
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+        <version>2.9</version>
+        <executions>
+          <execution>
+            <id>attach-javadocs</id>
+            <phase>package</phase>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+            <configuration>
+              <additionalparam>${javadoc.opts}</additionalparam>
+            </configuration>
+          </execution>
+        </executions>
+        <configuration>
+             <failOnError>false</failOnError>
+        </configuration>
+       </plugin>
+       
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-shade-plugin</artifactId>
+        <version>1.4</version>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>shade</goal>
+            </goals>
+            <configuration>
+              <transformers>
+                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                  <mainClass>org.lionsoul.ip2region.test.TestSearcher</mainClass>
+                </transformer>
+              </transformers>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+
+  <profiles>
+	  <profile>
+	    <id>java8-doclint-disabled</id>
+	    <activation>
+	      <jdk>[1.8,)</jdk>
+	    </activation>
+	    <properties>
+	      <javadoc.opts>-Xdoclint:none</javadoc.opts>
+	    </properties>
+	  </profile>
+      <profile>
+          <id>release</id>
+          <build>
+              <plugins>
+                  <!-- Source -->
+                  <plugin>
+                      <groupId>org.apache.maven.plugins</groupId>
+                      <artifactId>maven-source-plugin</artifactId>
+                      <version>2.2.1</version>
+                      <executions>
+                          <execution>
+                              <phase>package</phase>
+                              <goals>
+                                  <goal>jar-no-fork</goal>
+                              </goals>
+                          </execution>
+                      </executions>
+                  </plugin>
+                  <!-- Javadoc -->
+                  <plugin>
+                      <groupId>org.apache.maven.plugins</groupId>
+                      <artifactId>maven-javadoc-plugin</artifactId>
+                      <version>2.9.1</version>
+                      <executions>
+                          <execution>
+                              <phase>package</phase>
+			                  <goals>
+			                    <goal>jar</goal>
+			                  </goals>
+			                  <configuration>
+			                    <additionalparam>${javadoc.opts}</additionalparam>
+			                  </configuration>
+                          </execution>
+                      </executions>
+                  </plugin>
+                  <!-- GPG -->
+                  <plugin>
+                      <groupId>org.apache.maven.plugins</groupId>
+                      <artifactId>maven-gpg-plugin</artifactId>
+                      <version>1.5</version>
+                      <executions>
+                          <execution>
+                              <phase>verify</phase>
+                              <goals>
+                                  <goal>sign</goal>
+                              </goals>
+                          </execution>
+                      </executions>
+                  </plugin>
+              </plugins>
+          </build>
+          <distributionManagement>
+              <snapshotRepository>
+                  <id>oss-parent</id>
+                  <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
+              </snapshotRepository>
+              <repository>
+                  <id>oss-parent</id>
+                  <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+              </repository>
+          </distributionManagement>
+      </profile>
+  </profiles>
+
+</project>

binding/java/src/main/java/org/lionsoul/ip2region/DbConfig.java

@@ -32,12 +32,12 @@ public class DbConfig
         }
         
         this.totalHeaderSize = totalHeaderSize;
-        this.indexBlockSize = 4096; //4 * 1024
+        this.indexBlockSize  = 8192; //4 * 2048
     }
     
     public DbConfig() throws DbMakerConfigException
     {
-        this(8192);
+        this(8 * 2048);
     }
 
     public int getTotalHeaderSize()

binding/java/src/main/java/org/lionsoul/ip2region/DbSearcher.java

@@ -58,6 +58,23 @@ public class DbSearcher
         raf = new RandomAccessFile(dbFile, "r");
     }
 
+    /**
+     * construct method with self-define std ip2region bianry string support
+     * Thanks to the issue from Wendal at https://gitee.com/lionsoul/ip2region/issues/IILFL
+     *
+     * @param   dbConfig
+     * @param   dbBinStr
+     */
+    public DbSearcher(DbConfig dbConfig, byte[] dbBinStr)
+    {
+        this.dbConfig = dbConfig;
+        this.dbBinStr = dbBinStr;
+
+        firstIndexPtr = Util.getIntLong(dbBinStr, 0);
+        lastIndexPtr  = Util.getIntLong(dbBinStr, 4);
+        totalIndexBlocks = (int)((lastIndexPtr - firstIndexPtr)/IndexBlock.getIndexBlockLength()) + 1;
+    }
+
     /**
      * get the region with a int ip address with memory binary search algorithm
      *
@@ -163,8 +180,8 @@ public class DbSearcher
         //check and load the header
         if ( HeaderSip == null )  {
             raf.seek(8L);    //pass the super block
-            //byte[] b = new byte[dbConfig.getTotalHeaderSize()];
+            byte[] b = new byte[dbConfig.getTotalHeaderSize()];
-            byte[] b = new byte[4096];
+            // byte[] b = new byte[4096];
             raf.readFully(b, 0, b.length);
             
             //fill the header

binding/lua/Ip2region.lua

@@ -0,0 +1,443 @@
+--[[
+Ip2region lua binding
+
+@author chenxin<chenxin619315@gmail.com>
+@date   2018/10/02
+]]--
+
+require("bit32");
+
+local INDEX_BLOCK_LENGTH  = 12;
+local TOTAL_HEADER_LENGTH = 8192;
+local _M = {
+    dbFile = "",
+    dbFileHandler = "",
+    dbBinStr = "",
+    HeaderSip = "", 
+    HeaderPtr = "",
+    headerLen = 0,
+    firstIndexPtr = 0,
+    lastIndexPtr = 0, 
+    totalBlocks = 0
+};
+
+_G["Ip2region"] = _M;
+
+-- set the __index to itself
+_M.__index = _M;
+
+-- set the print meta-method
+_M.__tostring = function(table)
+    local t = {
+        "dbFile=" .. table.dbFile,
+        -- "dbFileHandler=" .. table.dbFileHandler,
+        "headerLen=" .. table.headerLen,
+        "firstIndexPtr" .. table.firstIndexPtr,
+        "lastIndexPtr" .. table.lastIndexPtr,
+        "totalBlocks" .. table.totalBlocks
+    };
+
+    return table.concat(t, ",");
+end
+
+--[[
+construct method
+
+@param  obj
+@return Ip2region object
+--]]
+function _M.new(dbFile)
+    obj = {};
+    setmetatable(obj, _M);
+    obj.dbFile = dbFile;
+    return obj;
+end
+
+
+--[[
+internal function to get a integer from a binary string
+
+@param  dbBinStr
+@param  idx
+@return Integer
+]]--
+function getLong(bs, idx)
+    local a1 = string.byte(string.sub(bs, idx, idx));
+    local a2 = bit32.lshift(string.byte(string.sub(bs, idx+1, idx+1)),  8);
+    local a3 = bit32.lshift(string.byte(string.sub(bs, idx+2, idx+2)), 16);
+    local a4 = bit32.lshift(string.byte(string.sub(bs, idx+3, idx+3)), 24);
+
+    local val = bit32.bor(a1, a2);
+    val = bit32.bor(val, a3);
+    val = bit32.bor(val, a4);
+
+    return val;
+end
+
+
+--[[
+internal function to convert the string ip to a long value
+
+@param  ip
+@return Integer
+]]--
+function _M.ip2long(self, ip)
+    -- dynamic arguments checking
+    -- to support object.ip2long and object:ip2long access
+    if ( type(self) == "string") then
+        ip = self;
+    end
+
+    local ini = 1;
+    local iip = 0;
+    local off = 24;
+    while true do
+        local pos = string.find(ip, '.', ini, true);
+        if ( not pos ) then
+            break;
+        end
+
+        local sub = string.sub(ip, ini, pos - 1);
+        if ( string.len(sub) < 1 ) then
+            return nil;
+        end
+
+        iip = bit32.bor(iip, bit32.lshift(tonumber(sub), off));
+        ini = pos + 1;
+        off = off - 8;
+    end
+
+    -- check if it is a valid ip address
+    if ( off ~= 0 or ini > string.len(ip) ) then
+        return nil;
+    end
+
+    local sub = string.sub(ip, ini);
+    if ( string.len(sub) < 1 ) then
+        return nil;
+    end
+
+    return bit32.bor(iip, bit32.lshift(tonumber(sub), off));
+end
+
+
+--[[
+internal function to get the whole content of a file
+
+@param  file
+@return String
+]]--
+function get_file_contents(file)
+    local fi = io.input(file);
+    if ( not fi ) then
+        return nil;
+    end
+
+    local str = io.read("*a");
+    io.close();
+    return str;
+end
+
+
+--[[
+set the current db file path
+
+@param  dbFile
+]]--
+function _M:setDbFile(dbFile)
+    self.dbFile = dbFile;
+end
+
+
+--[[
+all the db binary string will be loaded into memory
+then search the memory only and this will a lot faster than disk base search
+@Note: invoke it once before put it to public invoke could make it thread safe
+
+@param  ip
+@return table or nil for failed
+]]--
+function _M:memorySearch(ip)
+    -- string ip conversion
+    if ( type(ip) == "string" ) then
+        ip = self:ip2long(ip);
+        if ( ip == nil ) then
+            return nil;
+        end
+    end;
+
+    -- check and load the binary string for the first time
+    if ( self.dbBinStr == "" ) then
+        self.dbBinStr = get_file_contents(self.dbFile);
+        if ( not self.dbBinStr ) then
+            return nil;
+        end
+
+        self.firstIndexPtr = getLong(self.dbBinStr, 1);
+        self.lastIndexPtr  = getLong(self.dbBinStr, 5);
+        self.totalBlocks   = (self.lastIndexPtr - self.firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
+    end
+
+
+    -- binary search to define the data
+    local l = 0;
+    local h = self.totalBlocks;
+    local dataPtr = 0;
+    while ( l <= h ) do
+        local m = math.floor((l + h) / 2);
+        local p = self.firstIndexPtr + m * INDEX_BLOCK_LENGTH;
+        local sip = getLong(self.dbBinStr, p + 1);
+        if ( ip < sip ) then
+            h = m - 1;
+        else
+            local eip = getLong(self.dbBinStr, p + 5);  -- 4 + 1
+            if ( ip > eip ) then
+                l = m + 1;
+            else
+                dataPtr = getLong(self.dbBinStr, p + 9); -- 8 + 1
+                break;
+            end
+        end
+    end
+
+    -- not matched just stop it here
+    if ( dataPtr == 0 ) then return nil end
+
+    -- get the data
+    local dataLen = bit32.band(bit32.rshift(dataPtr, 24), 0xFF);
+    dataPtr = bit32.band(dataPtr, 0x00FFFFFF);
+    local dptr = dataPtr + 5;   -- 4 + 1
+
+    return {
+        city_id = getLong(self.dbBinStr, dataPtr), 
+        region  = string.sub(self.dbBinStr, dptr, dptr + dataLen - 5)
+    };
+end
+
+
+--[[
+get the data block through the specified ip address 
+or long ip numeric with binary search algorithm
+
+@param  ip
+@return table or nil for failed
+]]--
+function _M:binarySearch(ip)
+    -- check and conver the ip address
+    if ( type(ip) == "string" ) then
+        ip = self:ip2long(ip);
+        if ( ip == nil ) then
+            return nil;
+        end
+    end
+
+    if ( self.totalBlocks == 0 ) then
+        -- check and open the original db file
+        self.dbFileHandler = io.open(self.dbFile, "r");
+        if ( not self.dbFileHandler ) then
+            return nil;
+        end
+
+        self.dbFileHandler:seek("set", 0);
+        local superBlock = self.dbFileHandler:read(8);
+
+        self.firstIndexPtr = getLong(superBlock, 1);    -- 0 + 1
+        self.lastIndexPtr  = getLong(superBlock, 5);    -- 4 + 1
+        self.totalBlocks   = (self.lastIndexPtr-self.firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
+    end
+
+
+    -- binary search to define the data
+    local l = 0;
+    local h = self.totalBlocks;
+    local dataPtr = 0;
+    while ( l <= h ) do
+        local m = math.floor((l + h) / 2);
+        local p = m * INDEX_BLOCK_LENGTH;
+        self.dbFileHandler:seek("set", self.firstIndexPtr + p);
+        local buffer = self.dbFileHandler:read(INDEX_BLOCK_LENGTH);
+        local sip = getLong(buffer, 1); -- 0 + 1
+        if ( ip < sip ) then
+            h = m - 1;
+        else
+            local eip = getLong(buffer, 5);   -- 4 + 1
+            if ( ip > eip ) then
+                l = m + 1;
+            else
+                dataPtr = getLong(buffer, 9);   -- 8 + 1
+                break;
+            end
+        end
+    end
+
+    -- not matched just stop it here
+    if ( dataPtr == 0 ) then return nil; end
+
+
+    -- get the data
+    local dataLen = bit32.band(bit32.rshift(dataPtr, 24), 0xFF);
+    dataPtr = bit32.band(dataPtr, 0x00FFFFFF);
+
+    self.dbFileHandler:seek("set", dataPtr);
+    local data = self.dbFileHandler:read(dataLen);
+
+    return {
+        city_id = getLong(data, 1),    -- 0 + 1
+        region  = string.sub(data, 5)  -- 4 + 1
+    };
+end
+
+
+--[[
+get the data block associated with the specified ip with b-tree search algorithm
+
+@param  ip
+@return table or nil for failed
+]]--
+function _M:btreeSearch(ip)
+    -- string ip to integer conversion
+    if ( type(ip) == "string" ) then
+        ip = self:ip2long(ip);
+        if ( ip == nil ) then
+            return nil;
+        end
+    end
+
+    -- check and load the header
+    if ( self.headerLen == 0 ) then
+        -- check and open the original db file
+        self.dbFileHandler = io.open(self.dbFile, 'r');
+        if ( not self.dbFileHandler ) then
+            return nil;
+        end
+
+        self.dbFileHandler:seek("set", 8);
+        local buffer = self.dbFileHandler:read(TOTAL_HEADER_LENGTH);
+        
+        -- fill the header
+        local i = 0;
+        local idx = 0;
+        self.HeaderSip = {};
+        self.HeaderPtr = {};
+        for i=0, TOTAL_HEADER_LENGTH, 8 do
+            local startIp = getLong(buffer, i + 1); -- 0 + 1
+            local dataPtr = getLong(buffer, i + 5); -- 4 + 1
+            if ( dataPtr == 0 ) then
+                break;
+            end
+
+            table.insert(self.HeaderSip, startIp);
+            table.insert(self.HeaderPtr, dataPtr);
+            idx = idx + 1;
+        end
+
+        self.headerLen = idx;
+    end
+    
+
+    -- 1. define the index block with the binary search
+    local l = 0; 
+    local h = self.headerLen;
+    local sptr = 0;
+    local eptr = 0;
+    while ( l <= h ) do
+        local m = math.floor((l + h) / 2);
+        -- perfetc matched, just return it
+        if ( ip == self.HeaderSip[m] ) then
+            if ( m > 0 ) then
+                sptr = self.HeaderPtr[m-1];
+                eptr = self.HeaderPtr[m  ];
+            else
+                sptr = self.HeaderPtr[m  ];
+                eptr = self.HeaderPtr[m+1];
+            end
+            
+            break;
+        end
+        
+        -- less then the middle value
+        if ( ip < self.HeaderSip[m] ) then
+            if ( m == 0 ) then
+                sptr = self.HeaderPtr[m  ];
+                eptr = self.HeaderPtr[m+1];
+                break;
+            elseif ( ip > self.HeaderSip[m-1] ) then
+                sptr = self.HeaderPtr[m-1];
+                eptr = self.HeaderPtr[m  ];
+                break;
+            end
+            h = m - 1;
+        else
+            if ( m == self.headerLen - 1 ) then
+                sptr = self.HeaderPtr[m-1];
+                eptr = self.HeaderPtr[m  ];
+                break;
+            elseif ( ip <= self.HeaderSip[m+1] ) then
+                sptr = self.HeaderPtr[m  ];
+                eptr = self.HeaderPtr[m+1];
+                break;
+            end
+            l = m + 1;
+        end
+    end
+    
+    -- match nothing just stop it
+    if ( sptr == 0 ) then return nil; end
+    
+    -- 2. search the index blocks to define the data
+    self.dbFileHandler:seek("set", sptr);
+    local blockLen = eptr - sptr;
+    local index = self.dbFileHandler:read(blockLen + INDEX_BLOCK_LENGTH);
+    local dataPtr = 0;
+
+    l = 0;
+    h = blockLen / INDEX_BLOCK_LENGTH;
+    while ( l <= h ) do
+        local m = math.floor((l + h) / 2);
+        local p = m * INDEX_BLOCK_LENGTH;
+        local sip = getLong(index, p + 1);       -- 0 + 1
+        if ( ip < sip ) then
+            h = m - 1;
+        else
+            local eip = getLong(index, p + 5);   -- 4 + 1
+            if ( ip > eip ) then
+                l = m + 1;
+            else
+                dataPtr = getLong(index, p + 9); -- 8 + 1
+                break;
+            end
+        end
+    end
+    
+    -- not matched
+    if ( dataPtr == 0 ) then return nil; end
+    
+    -- 3. get the data
+    local dataLen = bit32.band(bit32.rshift(dataPtr, 24), 0xFF);
+    dataPtr = bit32.band(dataPtr, 0x00FFFFFF);
+    
+    self.dbFileHandler:seek("set", dataPtr);
+    local data = self.dbFileHandler:read(dataLen);
+
+    return {
+        city_id = getLong(data, 1),     -- 0 + 1
+        region  = string.sub(data, 5)   -- 4 + 1
+    };
+end
+
+
+--[[
+close the object and do the basic gc
+]]--
+function _M.close(self)
+    if ( self.dbFileHandler ~= "" ) then
+        self.dbFileHandler:close();
+    end
+
+    if ( self.dbBinStr ~= "" ) then
+        self.dbBinStr = nil;
+    end
+end
+
+
+return _M;

binding/lua/README.md

@@ -0,0 +1,59 @@
+# Lua ip2region binding
+
+### 一，如何测试
+* 1, cd到ip2region/binding/lua/根目录
+* 2, 运行testSearcher测试程序
+```shell
+lua testSearcher.lua ../../data/ip2region.db
+```
+* 3, 输入ip地址开始测试即可
+```shell
+initializing btree
++----------------------------------+
+| ip2region test script            |
+| Author: chenxin619315@gmail.com  |
+| Type 'quit' to exit program      |
++----------------------------------+
+ip2region>> 1.2.3.4
+0|美国|0|华盛顿|0|0 in 8.001000 millseconds
+ip2region>> 101.233.153.103
+2163|中国|0|广东省|深圳市|鹏博士 in 0.176000 millseconds
+ip2region>>
+```
+
+
+### 二，如何使用
+* 1, 将Ip2region.lua拷贝到你的package.path下
+* 2, 通过如下流程在你的lua程序中使用
+```lua
+-- 包含模块
+local Ip2region = require "Ip2region";
+
+-- 创建查询对象
+-- 设置ip2region.db的文件地址，dbFile表示ip2region.db数据库文件的地址
+-- 注意new方法是通过“.”调用，而不是“:”
+local ip2region = Ip2region.new("ip2region.db file path");
+
+-- 也可以通过如下方式设置dbFile
+-- ip2region.dbFile = "ip2region.db file path";
+-- ip2region.setDbFile("ip2region.db file path");
+
+
+local data;
+
+-- 查询，备注，尽量请使用“:”调用方法，使用“.”需要主动传递ip2region对象参数
+-- 1，binary查询
+data = ip2region:binarySearch("101.233.153.103");
+
+-- 2，btree查询
+data = ip2region:btreeSearch("101.233.153.103");
+
+-- 3，memory查询
+data = ip2region:memorySearch("101.233.153.103");
+
+-- 返回结果如下
+print("city_id=", data.city_id, "region=", data.region);
+```
+
+### 三，备注
+* 1，Ip2region模块的位运算依赖了bit32模块，这个是lua 5.2才开始支持的。

binding/lua/testSearcher.lua

@@ -0,0 +1,85 @@
+--[[
+ip2region lua client test script
+
+@author chenxin<chenxin619315@gmail.com>
+]]--
+
+-- check the command line arguments
+if ( not arg[1] ) then
+    print([[
+Usage: lua testSearcher.lua [ip2region db file] [algorithm]
++-Optional Algorithm: binary, b-tree, memory]]);
+    os.exit();
+end
+
+local Ip2region = require "Ip2region";
+-- local cjson = require "cjson";
+-- local socket = require "socket";
+
+
+-- check and parse the dbFile and the method algorithm
+-- Create a new ip2region object by the new interface
+local ip2region = Ip2region.new(arg[1]);
+
+-- reset the dbFile by the follow two ways:
+-- ip2region.dbFile = arg[1];
+-- ip2region:setDbFile(arg[1]);
+
+
+local algorithm = "btree";
+if ( arg[2] ~= nil ) then
+    local arg_2 = string.lower(arg[2]);
+    if ( arg_2 ~= "binary" and arg_2 ~= "memory" ) then
+        algorithm = "binary";
+    elseif ( arg_2 == "memory" ) then
+        algorithm = "memory";
+    end
+end
+
+
+
+-- local data = searcher:memorySearch("120.79.17.142");
+-- local data = searcher:binarySearch("120.79.17.142");
+-- local data = searcher:btreeSearch("120.79.17.142");
+print("initializing " .. algorithm ..[[ 
++----------------------------------+
+| ip2region test script            |
+| Author: chenxin619315@gmail.com  |
+| Type 'quit' to exit program      |
++----------------------------------+]]
+);
+
+while ( true ) do
+    io.write("ip2region>> ");
+    io.input(io.stdin);
+    local line = io.read();
+    if ( line == nil ) then
+        -- do nothing
+        break;
+    elseif ( line == "quit" ) then
+        break;
+    elseif ( ip2region.ip2long(line) == nil ) then
+        print("Invalid ip address=", line);
+    else
+        local data;
+        local s_time = os.clock();
+        if ( algorithm == "btree" ) then
+            data = ip2region:btreeSearch(line);
+        elseif ( algorithm == "binary" ) then
+            data = ip2region:binarySearch(line);
+        elseif ( algorithm == "memory" ) then
+            data = ip2region:memorySearch(line);
+        end
+
+        local cost_time = (os.clock() - s_time) * 1000; -- to millseconds
+        if ( data == nil ) then
+            io.write("Failed for ip=", line, " is it a valid ip address ?");
+        else
+            io.write(string.format("%u|%s in %5f millseconds\n", data.city_id, data.region, cost_time));
+        end
+    end
+end
+
+-- close the object
+-- print(ip2region);
+ip2region:close();

binding/lua_c/Makefile

@@ -0,0 +1,28 @@
+# ip2region luc c module Make file
+# @author   chenxin<chenxin619315@gmail.com>
+# @date     2018/10/05
+
+# @Note
+# Please modify the LIBS and the LIB_DIR to fit you system
+# 
+
+VER = 5.2
+CC = gcc
+LIBS = -I ../c/ -I /usr/include/lua$(VER)/
+FFLAGS = -O2 -Wall -fPIC
+SO_FILE = Ip2region.so
+LIB_DIR = /usr/local/share/lua/$(VER)
+
+all: ../c/ip2region.c ../c/ip2region.h lua_ip2region.c
+	$(CC) $(FFLAGS) $(LIBS) ../c/ip2region.c lua_ip2region.c -fPIC -shared -o $(SO_FILE)
+
+install:
+	sudo mkdir -p $(LIB_DIR); \
+	sudo cp $(SO_FILE) $(LIB_DIR);\
+	echo "install Ip2region to $(LIB_DIR) successfully.";\
+
+clean:
+	find . -name \*.so | xargs rm -f
+	find . -name \*.o  | xargs rm -f
+
+.PHONY: clean

binding/lua_c/README.md

@@ -0,0 +1,74 @@
+# Lua ip2region c module binding
+
+
+### 一，如何安装
+* 1, cd到ip2region/binding/lua_c/根目录
+* 2, 运行如下命令
+```
+make
+sudo make install
+```
+
+* 3, 关于Makefile你可能需要更改里面的VER(版本号)和LIB_DIR(lua的so lib目录)来适应你的系统
+```shell
+VER = 5.2
+CC = gcc
+LIBS = -I ../c/ -I /usr/include/lua$(VER)/
+FFLAGS = -O2 -Wall -fPIC
+SO_FILE = Ip2region.so
+LIB_DIR = /usr/local/share/lua/$(VER)
+```
+
+### 二，如何测试
+* 1, cd到ip2region/binding/lua_c/根目录
+* 2, 运行testSearcher测试程序
+```shell
+lua testSearcher.lua ../../data/ip2region.db
+```
+* 3, 输入ip地址开始测试即可
+```shell
+initializing btree
++----------------------------------+
+| ip2region test script            |
+| Author: chenxin619315@gmail.com  |
+| Type 'quit' to exit program      |
++----------------------------------+
+ip2region>> 1.2.3.4
+0|美国|0|华盛顿|0|0 in 0.100000 millseconds
+ip2region>> 101.233.153.103
+2163|中国|0|广东省|深圳市|鹏博士 in 0.045000 millseconds
+ip2region>>
+```
+
+
+### 三，如何使用
+* 1, 先参考第一步安装，把Ip2region.so安装到你系统lua的lib目录下
+* 2, 通过如下流程在你的lua程序中使用
+```lua
+-- 包含模块
+local Ip2region = require "Ip2region";
+
+-- 创建查询对象
+-- 设置ip2region.db的文件地址，dbFile表示ip2region.db数据库文件的地址
+-- 注意new方法是通过“.”调用，而不是“:”
+local ip2region = Ip2region.new("ip2region.db file path");
+
+local data;
+
+-- 查询，备注，尽量请使用“:”调用方法，使用“.”需要主动传递ip2region对象参数
+-- 1，binary查询
+data = ip2region:binarySearch("101.233.153.103");
+
+-- 2，btree查询
+data = ip2region:btreeSearch("101.233.153.103");
+
+-- 3，memory查询
+data = ip2region:memorySearch("101.233.153.103");
+
+-- 返回结果如下
+print("city_id=", data.city_id, "region=", data.region);
+```
+
+### 四，备注
+* 1，c模块的Ip2region以来binding/c/的实现，请保持binding/c/存在，并且和lua_c模块同目录。
+* 2，Ip2region的c模块拥有和c模块几乎等同的性能，生产建议使用lua_c模块代替纯lua模块的使用。

binding/lua_c/lua_ip2region.c

@@ -0,0 +1,232 @@
+/**
+ * Ip2region lua c binding
+ *
+ * @author  chenxin<chenxin619315@gmail.com>
+ * @date    2018/10/04
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <lua.h>
+#include <lauxlib.h>
+#include "../c/ip2region.h"
+
+#define L_METATABLE_NAME "Ip2region_MT"
+
+/** create a new ip2region object with a specified dbFile */
+static int lua_ip2region_new(lua_State *L)
+{
+    ip2region_entry *self;
+    const char *dbFile;
+
+    /* Check the arguments are valid */
+    dbFile = luaL_checkstring(L, 1);
+    if ( dbFile == NULL ) {
+        luaL_error(L, "dbFile cannot be empty");
+    }
+
+    /* Create the user data and push it onto the stack */
+    self = (ip2region_entry *) lua_newuserdata(L, sizeof(ip2region_entry));
+    /* Push the metatable onto the stack */
+    luaL_getmetatable(L, L_METATABLE_NAME);
+    /* Set the metatable on the userdata */
+    lua_setmetatable(L, -2);
+
+    /* Initialize the entry */
+    ip2region_create(self, dbFile);
+
+    return 1;
+}
+
+/** destroy the specified ip2region instance */
+static int lua_ip2region_destroy(lua_State *L)
+{
+    ip2region_entry *self;
+    self = (ip2region_entry *) luaL_checkudata(L, 1, L_METATABLE_NAME);
+    ip2region_destroy(self);
+
+    return 0;
+}
+
+
+
+#define get_search_args(L, entry, ip) \
+do {    \
+    luaL_argcheck(L, lua_gettop(L) == 2, 2, "Object and ip address needed"); \
+    entry = (ip2region_entry *) luaL_checkudata(L, 1, L_METATABLE_NAME); \
+    ip = luaL_checkstring(L, 2);  \
+} while (0); \
+
+
+#define set_search_result(L, data) \
+do { \
+    lua_newtable(L); \
+    lua_pushinteger(L, data.city_id); \
+    lua_setfield(L, -2, "city_id"); \
+    lua_pushfstring(L, "%s", data.region); \
+    lua_setfield(L, -2, "region"); \
+} while (0); \
+
+
+/** ip2region_memory_search wrapper */
+static int lua_ip2region_memory_search(lua_State *L)
+{
+    ip2region_entry *self;
+    const char *addr;
+    datablock_entry data;
+
+    // luaL_argcheck(L, lua_gettop(L) == 2, 2, "object and ip address needed");
+    // self = (ip2region_entry *) luaL_checkudata(L, 1, L_METATABLE_NAME);
+    // addr = luaL_checkstring(L, 2);
+    /* Check and get the search parameters */
+    get_search_args(L, self, addr);
+
+    /* do the memory search */
+    if ( ip2region_memory_search(self, ip2long(addr), &data) == 0 ) {
+        lua_pushnil(L);
+        return 1;
+    }
+    
+    // lua_newtable(L);
+    // lua_pushinteger(L, data.city_id);
+    // lua_setfield(L, -2, "city_id");
+    // lua_pushfstring(L, "%s", data.region);
+    // lua_setfield(L, -2, "region");
+    set_search_result(L, data);
+
+    return 1;
+}
+
+/** ip2region_binary_search wrapper */
+static int lua_ip2region_binary_search(lua_State *L)
+{
+    ip2region_entry *self;
+    const char *addr;
+    datablock_entry data;
+
+    /* Check and get the search parameters */
+    get_search_args(L, self, addr);
+
+    /* Do the binary search */
+    if ( ip2region_binary_search(self, ip2long(addr), &data) == 0 ) {
+        lua_pushnil(L);
+        return 1;
+    }
+
+    /* Set the return value */
+    set_search_result(L, data);
+
+    return 1;
+}
+
+/** ip2region_btree_search wrapper */
+static int lua_ip2region_btree_search(lua_State *L)
+{
+    ip2region_entry *self;
+    const char *addr;
+    datablock_entry data;
+
+    /* Check and get the search parameters */
+    get_search_args(L, self, addr);
+
+    /* Do the btree search */
+    if ( ip2region_btree_search(self, ip2long(addr), &data) == 0 ) {
+        lua_pushnil(L);
+        return 1;
+    }
+
+    /* Set the return value */
+    set_search_result(L, data);
+
+    return 1;
+}
+
+
+/** ip2long wrapper */
+static int lua_ip2long(lua_State *L)
+{
+    int argc;
+    const char *addr;
+    uint_t ipval;
+
+    argc = lua_gettop(L);
+    if ( argc == 1 ) {
+        addr = luaL_checkstring(L, 1);
+    } else {
+        luaL_checkudata(L, 1, L_METATABLE_NAME);
+        addr = luaL_checkstring(L, 2);
+    }
+
+    if ( (ipval = ip2long(addr)) == 0 ) {
+        lua_pushnil(L);
+        return 1;
+    }
+
+    lua_pushinteger(L, (ipval & 0x7FFFFFFF));
+
+    return 1;
+}
+
+static int lua_ip2region_tostring(lua_State *L)
+{
+    ip2region_entry *self;
+    self = (ip2region_entry *) luaL_checkudata(L, 1, L_METATABLE_NAME);
+
+    /* Push the string to return to lua */
+    lua_pushfstring(L, 
+        "dbFile=%s, headerLen=%d, fristIndexPtr=%d, lastIndexPtr=%d, totalBlocks=%d",
+        self->dbFile, self->headerLen, self->firstIndexPtr,
+        self->lastIndexPtr, self->totalBlocks
+    );
+
+    return 1;
+}
+
+
+/** module method array */
+static const struct luaL_Reg ip2region_methods[] = {
+    // { "new",            lua_ip2region_new },
+    // { "ip2long",        lua_ip2long },
+    { "memorySearch",   lua_ip2region_memory_search },
+    { "binarySearch",   lua_ip2region_binary_search },
+    { "btreeSearch",    lua_ip2region_btree_search },
+    { "close",          lua_ip2region_destroy },
+    { "__gc",           lua_ip2region_destroy },
+    { "__tostring",     lua_ip2region_tostring },
+    { NULL, NULL },
+};
+
+/** module function array */
+static const struct luaL_Reg ip2region_functions[] = {
+    { "new",        lua_ip2region_new },
+    { "ip2long",    lua_ip2long },
+    { NULL, NULL }
+};
+
+/** module open function interface */
+int luaopen_Ip2region(lua_State *L)
+{
+    /* Create a metatable and push it onto the stack */
+    luaL_newmetatable(L, L_METATABLE_NAME);
+    /* Duplicate the metatable on the stack */
+    lua_pushvalue(L, -1);
+
+    /* Pop the first metatable off the stack
+     * and assign it to the __index of the second one.
+     * so we set the metatable to the table itself.
+    */
+    lua_setfield(L, -2, "__index");
+
+
+    /* Set the methods fo the metatable that could and should be 
+     * access via object:func in lua block 
+     */
+    luaL_setfuncs(L, ip2region_methods, 0);
+    luaL_setfuncs(L, ip2region_functions, 0);
+
+    /* Finally register the object.func functions
+     * into the table witch at the top of the stack */
+    // luaL_newlib(L, ip2region_functions);
+
+    return 1;
+}

binding/lua_c/testSearcher.lua

@@ -0,0 +1,86 @@
+--[[
+ip2region lua client test script
+
+@author chenxin<chenxin619315@gmail.com>
+]]--
+
+-- check the command line arguments
+if ( not arg[1] ) then
+    print([[
+Usage: lua testSearcher.lua [ip2region db file] [algorithm]
++-Optional Algorithm: binary, b-tree, memory]]);
+    os.exit();
+end
+
+local Ip2region = require "Ip2region";
+-- local cjson = require "cjson";
+-- local socket = require "socket";
+
+
+-- check and parse the dbFile and the method algorithm
+-- Create a new ip2region object by the new interface
+local ip2region = Ip2region.new(arg[1]);
+
+-- reset the dbFile by the follow two ways:
+-- ip2region.dbFile = arg[1];
+-- ip2region:setDbFile(arg[1]);
+
+
+local algorithm = "btree";
+if ( arg[2] ~= nil ) then
+    local arg_2 = string.lower(arg[2]);
+    if ( arg_2 ~= "binary" and arg_2 ~= "memory" ) then
+        algorithm = "binary";
+    elseif ( arg_2 == "memory" ) then
+        algorithm = "memory";
+    end
+end
+
+
+
+-- local data = searcher:memorySearch("120.79.17.142");
+-- local data = searcher:binarySearch("120.79.17.142");
+-- local data = searcher:btreeSearch("120.79.17.142");
+print("initializing " .. algorithm ..[[ 
++----------------------------------+
+| ip2region test script            |
+| Author: chenxin619315@gmail.com  |
+| Type 'quit' to exit program      |
++----------------------------------+]]
+);
+
+while ( true ) do
+    io.write("ip2region>> ");
+    io.input(io.stdin);
+    local line = io.read();
+    if ( line == nil ) then
+        -- do nothing
+        break;
+    elseif ( line == "quit" ) then
+        break;
+    elseif ( Ip2region.ip2long(line) == nil ) then
+        print("Invalid ip address=", line);
+    else
+        local data;
+        local s_time = os.clock();
+        if ( algorithm == "btree" ) then
+            data = ip2region:btreeSearch(line);
+        elseif ( algorithm == "binary" ) then
+            data = ip2region:binarySearch(line);
+        elseif ( algorithm == "memory" ) then
+            data = ip2region:memorySearch(line);
+        end
+
+        local cost_time = (os.clock() - s_time) * 1000; -- to millseconds
+        if ( data == nil ) then
+            io.write("Failed for ip=", line, " is it a valid ip address ?");
+        else
+            io.write(string.format("%u|%s in %5f millseconds\n", data.city_id, data.region, cost_time));
+        end
+    end
+end
+
+-- close the object
+-- Also the lua gc will invoke it automatically
+-- print(ip2region);
+ip2region:close();

binding/nodejs/.gitignore

@@ -0,0 +1,2 @@
+node_modules/
+data/

binding/nodejs/.prettierrc

@@ -0,0 +1,4 @@
+{
+  "singleQuote": true,
+  "tabWidth": 4
+}

binding/nodejs/README.md

@@ -1,3 +1,86 @@
 # nodejs 客户端
 
-现已实现同步查询，异步查询未实现，用法参考 test.js
+## Install
+```
+npm install lionsoul-ip2region --save 
+```
+
+## Example
+
+```
+const searcher = require('lionsoul-ip2region').create();
+searcher.btreeSearchSync('xxx.xxx.xxx.xxx')
+// => { city: 2163, region: '中国|0|广东省|深圳市|联通' }
+```
+
+## 实现情况：
+
+现已实现同步和异步查询，具体使用方法可以参考 `nodejs\tests\constructorTest.spec.js` 和`nodejs\tests\createTest.spec.js`。
+
+## 如何贡献？
+
+你可以任意修改代码，但必须确保通过全部的单元测试。要保证通过全部的单元测试，请在 Nodejs 控制台下切换到 nodejs 目录：
+
+1）在此之前，请先运行 `npm i` 确保你已经安装了各类初始化第三方工具。
+2）然后运行 `npm run coverage` 确保你的代码可以通过全部测试（必要时可以添加测试）。
+
+```bash
+D:\Projects\ip2region\binding\nodejs>npm run coverage
+
+> ip2region@0.0.1 coverage D:\Projects\ip2region\binding\nodejs
+> npm run test && jest --coverage
+
+
+> ip2region@0.0.1 test D:\Projects\ip2region\binding\nodejs
+> jest
+
+ PASS  tests\constructorTest.spec.js
+ PASS  tests\createTest.spec.js
+ PASS  tests\exceptionTest.spec.js
+
+Snapshot Summary
+ › 168 snapshots written in 2 test suites.
+
+Test Suites: 3 passed, 3 total
+Tests:       14 passed, 14 total
+Snapshots:   168 added, 168 total
+Time:        1.645s
+Ran all test suites.
+ PASS  tests\constructorTest.spec.js
+ PASS  tests\createTest.spec.js
+ PASS  tests\exceptionTest.spec.js
+----------------------|----------|----------|----------|----------|-------------------|
+File                  |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
+----------------------|----------|----------|----------|----------|-------------------|
+All files             |    92.34 |    80.77 |       96 |    93.83 |                   |
+ nodejs               |    91.95 |    80.26 |    95.65 |    93.51 |                   |
+  ip2region.js        |    91.95 |    80.26 |    95.65 |    93.51 |... 09,410,460,484 |
+ nodejs/tests/utils   |      100 |      100 |      100 |      100 |                   |
+  asyncFor.js         |      100 |      100 |      100 |      100 |                   |
+  fetchMainVersion.js |      100 |      100 |      100 |      100 |                   |
+  testData.js         |      100 |      100 |      100 |      100 |                   |
+----------------------|----------|----------|----------|----------|-------------------|
+
+Test Suites: 3 passed, 3 total
+Tests:       14 passed, 14 total
+Snapshots:   168 passed, 168 total
+Time:        1.792s
+Ran all test suites.
+```
+3）使用benchmark测试，结果如下：
+```bash
+D:\Projects\ip2region\binding\nodejs>node D:\Projects\ip2region\binding\nodejs\tests\benchmarkTests\main.js
+MemorySearchSync x 55,969 ops/sec ±2.22% (90 runs sampled)
+BinarySearchSync x 610 ops/sec ±5.41% (77 runs sampled)
+BtreeSearchSync x 2,439 ops/sec ±6.93% (69 runs sampled)
+MemorySearch x 2,924 ops/sec ±0.67% (85 runs sampled)
+BinarySearch x 154 ops/sec ±2.20% (69 runs sampled)
+BtreeSearch x 294 ops/sec ±2.58% (76 runs sampled)
+Rand    Name                Time (in milliseconds)
+1       MemorySearchSync    0.018
+2       MemorySearch        0.342
+3       BtreeSearchSync     0.410
+4       BinarySearchSync    1.639
+5       BtreeSearch         3.407
+6       BinarySearch        6.497
+```

binding/nodejs/deploy.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+echo 'create dir'
+if [ ! -d "data" ]; then
+  mkdir data
+fi
+
+echo "copy db"
+cp '../../data/ip2region.db' './data/'
+
+echo "npm publish"
+npm publish

binding/nodejs/ip2region.js

@@ -4,152 +4,335 @@
  * project: https://github.com/lionsoul2014/ip2region
  *
  * @author dongyado<dongyado@gmail.com>
- * */
+ * @author leeching<leeching.fx@gmail.com>
-var fs   = require('fs');
+ * @author dongwei<maledong_github@outlook.com>
-
+ */
-var ipbase = [16777216, 65536, 256, 1]; // for ip2long
+const fs = require('fs');
-var ip2region = {};
+const path = require('path');
-ip2region.db_file_path   = null;
+const DEFAULT_DB_PATH  = path.join(__dirname,'./data/ip2region.db') ;
-ip2region.db_fd          = null;
-
-var totalBlocks         = 0;
-var firstIndexPtr       = 0;
-var lastIndexPtr        = 0;
-var superBlock          = new Buffer(8);
-
-var indexBlockLength    = 12;
-var totalHeaderLength   = 4096;
 
+//#region Private Functions
+/**
+ * Convert ip to long (xxx.xxx.xxx.xxx to a integer)
+ *
+ * @param {string} ip
+ * @return {number} long value
+ */
+function _ip2long(ip) {
+    const arr = ip.split('.');
+    if (arr.length !== 4) {
+        throw new Error('invalid ip');
+    }
+    return arr.reduce((val, n, i) => {
+        n = Number(n);
+        if (!Number.isInteger(n) || n < 0 || n > 255) {
+            throw new Error('invalid ip');
+        }
+        return val + IP_BASE[i] * n;
+    }, 0);
+}
 
 /**
- * binary search synchronized
+ * Get long value from buffer with specified offset
- * */
+ *
-ip2region.binarySearchSync = function(ip)
+ * @param {Buffer} buffer
-{
+ * @param {number} offset
-    var low     = 0;
+ * @return {number} long value
-    var mid     = 0;
+ */
-    var high    = totalBlocks;
+function _getLong(buffer, offset) {
-    var dataPos = 0;
+    const val =
-    var pos     = 0;
+        (buffer[offset] & 0x000000ff) |
-    var sip     = 0;
+        ((buffer[offset + 1] << 8) & 0x0000ff00) |
-    var eip     = 0;
+        ((buffer[offset + 2] << 16) & 0x00ff0000) |
-    var indexBuffer = new Buffer(12);
+        ((buffer[offset + 3] << 24) & 0xff000000);
+    return val < 0 ? val >>> 0 : val;
+}
 
-    if( typeof(ip) == 'string' ) ip = ip2long(ip);
+//#endregion
+
+//#region Private Variables
+
+// We don't wanna expose a private global settings to
+// the public for safety reason.
+const _globalInstances = new Map();
+
+const IP_BASE = [16777216, 65536, 256, 1];
+const INDEX_BLOCK_LENGTH = 12;
+const TOTAL_HEADER_LENGTH = 8192;
+
+// Private Message Symbols for functions
+const PrepareHeader = Symbol('#PrepareHeader');
+const CalTotalBlocks = Symbol('#CalsTotalBlocks');
+const ReadDataSync = Symbol('#ReadDataSync');
+const ReadData = Symbol('#ReadData');
+
+//#endregion
+class IP2Region {
+
+    //#region Private Functions
+
+    [CalTotalBlocks]() {
+        const superBlock = Buffer.alloc(8);
+        fs.readSync(this.dbFd, superBlock, 0, 8, 0);
+        this.firstIndexPtr = _getLong(superBlock, 0);
+        this.lastIndexPtr = _getLong(superBlock, 4);
+        this.totalBlocks =
+            (this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH + 1;
+    }
+
+    [PrepareHeader]() {
+        fs.readSync(
+            this.dbFd,
+            this.headerIndexBuffer,
+            0,
+            TOTAL_HEADER_LENGTH,
+            8
+        );
+
+        for (let i = 0; i < TOTAL_HEADER_LENGTH; i += 8) {
+            const startIp = _getLong(this.headerIndexBuffer, i);
+            const dataPtr = _getLong(this.headerIndexBuffer, i + 4);
+            if (dataPtr == 0) break;
+
+            this.headerSip.push(startIp);
+            this.headerPtr.push(dataPtr);
+            this.headerLen++; // header index size count
+        }
+    }
+
+    [ReadData](dataPos, callBack) {
+        if (dataPos == 0) return callBack(null, null);
+        const dataLen = (dataPos >> 24) & 0xff;
+        dataPos = dataPos & 0x00ffffff;
+        const dataBuffer = Buffer.alloc(dataLen);
+
+        fs.read(this.dbFd, dataBuffer, 0, dataLen, dataPos, (err, result) => {
+            if (err) {
+                callBack(err, null);
+            }
+            else {
+                const city = _getLong(dataBuffer, 0);
+                const region = dataBuffer.toString('utf8', 4, dataLen);
+                callBack(null, { city, region });
+            }
+        });
+    }
+
+    [ReadDataSync](dataPos) {
+        if (dataPos == 0) return null;
+        const dataLen = (dataPos >> 24) & 0xff;
+        dataPos = dataPos & 0x00ffffff;
+        const dataBuffer = Buffer.alloc(dataLen);
+
+        fs.readSync(this.dbFd, dataBuffer, 0, dataLen, dataPos);
+
+        const city = _getLong(dataBuffer, 0);
+        const region = dataBuffer.toString('utf8', 4, dataLen);
+
+        return { city, region };
+    }
+    //#endregion
+
+    //#region Static Functions
+
+    // Single Instance
+    static create(dbPath = DEFAULT_DB_PATH) {
+        let existInstance = _globalInstances.get(dbPath);
+        if (existInstance == null) {
+            existInstance = new IP2Region({ dbPath: dbPath });
+        }
+        return existInstance;
+    }
+
+    /**
+     * For backward compatibility
+     */
+    static destroy() {
+        _globalInstances.forEach(([key, instance]) => {
+            instance.destroy();
+        });
+    }
+
+    //#endregion
+
+    constructor(options = {}) {
+
+        const { dbPath } = options;
+
+        // Keep for MemorySearch
+        this.totalInMemoryBytesSize = fs.statSync(dbPath).size;
+        this.totalInMemoryBytes = null;
+
+        this.dbFd = fs.openSync(dbPath, 'r');
+
+        this.dbPath = dbPath;
+
+        _globalInstances.set(this.dbPath, this);
+
+        this.totalBlocks = this.firstIndexPtr = this.lastIndexPtr = 0;
+        this[CalTotalBlocks]();
+
+        this.headerIndexBuffer = Buffer.alloc(TOTAL_HEADER_LENGTH);
+        this.headerSip = [];
+        this.headerPtr = [];
+        this.headerLen = 0;
+        this[PrepareHeader]();
+    }
+
+    //#region Public Functions
+    /**
+     * Destroy the current file by closing it.
+     */
+    destroy() {
+        fs.closeSync(this.dbFd);
+        _globalInstances.delete(this.dbPath);
+    }
+
+    /**
+     * Sync of binarySearch.
+     * @param {string} ip The IP address to search for.
+     * @return {SearchResult} A result something like `{ city: 2163, region: '中国|0|广东省|深圳市|阿里云' }`
+     */
+    binarySearchSync(ip) {
+
+        ip = _ip2long(ip);
+
+        let low = 0;
+        let mid = 0;
+        let high = this.totalBlocks;
+        let pos = 0;
+        let sip = 0;
+        const indexBuffer = Buffer.alloc(12);
 
         // binary search
         while (low <= high) {
-        mid = ((low + high) >> 1);
+            mid = (low + high) >> 1;
-        pos = firstIndexPtr + mid * indexBlockLength;
+            pos = this.firstIndexPtr + mid * INDEX_BLOCK_LENGTH;
-        fs.readSync(this.db_fd, indexBuffer, 0, indexBlockLength, pos);
+            fs.readSync(this.dbFd, indexBuffer, 0, INDEX_BLOCK_LENGTH, pos);
-        sip = getLong(indexBuffer, 0);
+            sip = _getLong(indexBuffer, 0);
 
-        //console.log( ' sip : ' + sip + ' eip : ' + eip );
             if (ip < sip) {
                 high = mid - 1;
             } else {
-            eip = getLong(indexBuffer, 4);
+                sip = _getLong(indexBuffer, 4);
-            if ( ip > eip ) {
+                if (ip > sip) {
                     low = mid + 1;
                 } else {
-                dataPos = getLong(indexBuffer, 8);
+                    sip = _getLong(indexBuffer, 8);
                     break;
                 }
             }
         }
-
+        return this[ReadDataSync](sip);
-    // read data
-    if (dataPos == 0) return null;
-    var dataLen = ((dataPos >> 24) & 0xFF);
-    var dataPos = (dataPos & 0x00FFFFFF);
-    var dataBuffer = new Buffer(dataLen);
-
-    fs.readSync(this.db_fd, dataBuffer, 0, dataLen, dataPos);
-
-    var city_id = getLong(dataBuffer, 0);
-    var data    = dataBuffer.toString('utf8', 4, dataLen);
-
-    //console.log(city_id);
-    //console.log(data);
-
-    return { city: city_id, region: data };
     }
 
-
-var headerSip = null;
-var headerPtr = 0;
-var headerLen = 0;
-
-
     /**
- * btree  search synchronized
+     * Async of binarySearch.
- * */
+     * @param {string} ip The IP address to search for.
-ip2region.btreeSearchSync = function(ip) 
+     * @param {Function} callBack The callBack function with two parameters, if successful,
-{
+     * err is null and result is `{ city: 2163, region: '中国|0|广东省|深圳市|阿里云' }`
-    var indexBlockBuffer  = new Buffer(indexBlockLength);
+     */
-    var headerIndexBuffer = new Buffer(totalHeaderLength);
+    binarySearch(ip, callBack) {
-    if( typeof(ip) == 'string' )  ip = ip2long(ip);
 
-    var i = 0;
+        ip = _ip2long(ip);
-    // header index handler
-    if (headerSip == null) {
-        fs.readSync(this.db_fd, headerIndexBuffer, 0, totalHeaderLength, 8);
-        headerSip = new Array();
-        headerPtr = new Array();
 
-        var startIp = 0;
+        let low = 0;
-        var dataPtr = 0;
+        let mid = 0;
-        for ( i = 0; i < totalHeaderLength; i += 8) {
+        let high = this.totalBlocks;
-            startIp = getLong(headerIndexBuffer, i);
+        let pos = 0;
-            dataPtr = getLong(headerIndexBuffer, i + 4);
+        let sip = 0;
-            if ( dataPtr == 0) break;
+        const indexBuffer = Buffer.alloc(12);
+        const _self = this;
 
-            headerSip.push(startIp);
+        // Because `while` is a sync method, we have to convert this to a recursive loop
-            headerPtr.push(dataPtr);
+        // and in each loop we should continue calling `setImmediate` until we found the IP.
-            headerLen++; // header index size count
+        function _innerAsyncWhile() {
+            if (low <= high) {
+                mid = (low + high) >> 1;
+                pos = _self.firstIndexPtr + mid * INDEX_BLOCK_LENGTH;
+
+                // Now async read the file
+                fs.read(_self.dbFd, indexBuffer, 0, INDEX_BLOCK_LENGTH, pos, (err) => {
+
+                    if (err) {
+                        return callBack(err, null);
+                    }
+
+                    sip = _getLong(indexBuffer, 0);
+
+                    if (ip < sip) {
+                        high = mid - 1;
+                        setImmediate(_innerAsyncWhile);
+                    } else {
+                        sip = _getLong(indexBuffer, 4);
+                        if (ip > sip) {
+                            low = mid + 1;
+                            setImmediate(_innerAsyncWhile);
+                        } else {
+                            sip = _getLong(indexBuffer, 8);
+                            _self[ReadData](sip, (err, result) => {
+                                callBack(err, result);
+                            });
                         }
                     }
+                });
+            }
+        }
+
+        // Call this immediately
+        _innerAsyncWhile();
+
+    }
+
+    /**
+     * Sync of btreeSearch.
+     * @param {string} ip The IP address to search for.
+     * @return {Function} A result something like `{ city: 2163, region: '中国|0|广东省|深圳市|阿里云' }`
+     */
+    btreeSearchSync(ip) {
+
+        ip = _ip2long(ip);
 
         // first search  (in header index)
-    var low  = 0;
+        let low = 0;
-    var mid  = 0;
+        let mid = 0;
-    var high = headerLen;
+        let high = this.headerLen;
-    var sptr = 0;
+        let sptr = 0;
-    var eptr = 0;
+        let eptr = 0;
 
         while (low <= high) {
-        mid = ((low + high) >> 1);
+            mid = (low + high) >> 1;
 
-        if (ip == headerSip[mid]) {
+            if (ip == this.headerSip[mid]) {
-            if ( m > 0) {
+                if (mid > 0) {
-                sptr = headerPtr[mid - 1];
+                    sptr = this.headerPtr[mid - 1];
-                eptr = headerPtr[mid];
+                    eptr = this.headerPtr[mid];
                 } else {
-                sptr = headerPtr[mid];
+                    sptr = this.headerPtr[mid];
-                eptr = headerPtr[mid + 1];
+                    eptr = this.headerPtr[mid + 1];
                 }
                 break;
             }
 
-        if ( ip < headerSip[mid]) {
+            if (ip < this.headerSip[mid]) {
                 if (mid == 0) {
-                sptr = headerPtr[mid];
+                    sptr = this.headerPtr[mid];
-                eptr = headerPtr[mid + 1];
+                    eptr = this.headerPtr[mid + 1];
                     break;
-            } else if ( ip > headerSip[mid - 1]) {
+                } else if (ip > this.headerSip[mid - 1]) {
-                sptr = headerPtr[mid - 1];
+                    sptr = this.headerPtr[mid - 1];
-                eptr = headerPtr[mid];
+                    eptr = this.headerPtr[mid];
                     break;
                 }
                 high = mid - 1;
             } else {
-            if ( mid == headerLen - 1) {
+                if (mid == this.headerLen - 1) {
-                sptr = headerPtr[mid - 1];
+                    sptr = this.headerPtr[mid - 1];
-                eptr = headerPtr[mid];
+                    eptr = this.headerPtr[mid];
                     break;
-            } else if ( ip <= headerSip[mid + 1]) {
+                } else if (ip <= this.headerSip[mid + 1]) {
-                sptr = headerPtr[mid];
+                    sptr = this.headerPtr[mid];
-                eptr = headerPtr[mid + 1];
+                    eptr = this.headerPtr[mid + 1];
                     break;
                 }
                 low = mid + 1;
@@ -160,118 +343,292 @@ ip2region.btreeSearchSync = function(ip)
         if (sptr == 0) return null;
 
         // second search (in index)
-    var blockLen    = eptr - sptr;
+        const blockLen = eptr - sptr;
-    var blockBuffer = new Buffer(blockLen + indexBlockLength);
+        const blockBuffer = Buffer.alloc(blockLen + INDEX_BLOCK_LENGTH);
-    fs.readSync(this.db_fd, blockBuffer, 0, blockLen + indexBlockLength, sptr);
+        fs.readSync(
+            this.dbFd,
+            blockBuffer,
+            0,
+            blockLen + INDEX_BLOCK_LENGTH,
+            sptr
+        );
 
         low = 0;
-    high = blockLen / indexBlockLength;
+        high = blockLen / INDEX_BLOCK_LENGTH;
 
-    var p = 0;
+        let p = 0;
-    var sip = 0;
+        let sip = 0;
-    var eip = 0;
-    var dataPtr = 0;
 
         while (low <= high) {
-        mid = ((low + high) >> 1);
+            mid = (low + high) >> 1;
-        p = mid * indexBlockLength;
+            p = mid * INDEX_BLOCK_LENGTH;
-        sip = getLong(blockBuffer, p);
+            sip = _getLong(blockBuffer, p);
 
             if (ip < sip) {
                 high = mid - 1;
             } else {
-            eip = getLong(blockBuffer, p + 4);
+                sip = _getLong(blockBuffer, p + 4);
-            if (ip > eip) {
+                if (ip > sip) {
                     low = mid + 1;
                 } else {
-                dataPtr =  getLong(blockBuffer, p + 8);
+                    sip = _getLong(blockBuffer, p + 8);
                     break;
                 }
             }
         }
-
+        return this[ReadDataSync](sip);
-    // read data
-    if (dataPtr == 0) return null;
-    var dataLen = ((dataPtr >> 24) & 0xFF);
-    var dataPtr = (dataPtr & 0x00FFFFFF);
-    var dataBuffer = new Buffer(dataLen);
-
-    fs.readSync(this.db_fd, dataBuffer, 0, dataLen, dataPtr);
-
-    var city_id = getLong(dataBuffer, 0);
-    var data    = dataBuffer.toString('utf8', 4, dataLen);
-
-    //console.log(city_id);
-    //console.log(data);
-
-    return { city: city_id, region: data };
     }
 
-
     /**
- * convert ip to long (xxx.xxx.xxx.xxx to a integer)
+    * Async of btreeSearch.
- * */
+     * @param {string} ip The IP address to search for.
-function ip2long(ip)
+     * @param {Function} callBack The callBack function with two parameters, if successful,
-{
+     * err is null and result is `{ city: 2163, region: '中国|0|广东省|深圳市|阿里云' }`
-    var val = 0;
+    */
-    ip.split('.').forEach(function(ele, i){
+    btreeSearch(ip, callBack) {
-        val += ipbase[i] * ele;
+        ip = _ip2long(ip);
+
+        // first search  (in header index)
+        let low = 0;
+        let mid = 0;
+        let high = this.headerLen;
+        let sptr = 0;
+        let eptr = 0;
+
+        while (low <= high) {
+            mid = (low + high) >> 1;
+
+            if (ip == this.headerSip[mid]) {
+                if (mid > 0) {
+                    sptr = this.headerPtr[mid - 1];
+                    eptr = this.headerPtr[mid];
+                } else {
+                    sptr = this.headerPtr[mid];
+                    eptr = this.headerPtr[mid + 1];
+                }
+                break;
+            }
+
+            if (ip < this.headerSip[mid]) {
+                if (mid == 0) {
+                    sptr = this.headerPtr[mid];
+                    eptr = this.headerPtr[mid + 1];
+                    break;
+                } else if (ip > this.headerSip[mid - 1]) {
+                    sptr = this.headerPtr[mid - 1];
+                    eptr = this.headerPtr[mid];
+                    break;
+                }
+                high = mid - 1;
+            } else {
+                if (mid == this.headerLen - 1) {
+                    sptr = this.headerPtr[mid - 1];
+                    eptr = this.headerPtr[mid];
+                    break;
+                } else if (ip <= this.headerSip[mid + 1]) {
+                    sptr = this.headerPtr[mid];
+                    eptr = this.headerPtr[mid + 1];
+                    break;
+                }
+                low = mid + 1;
+            }
+        }
+
+        // match nothing
+        if (sptr == 0) return callBack(null, null);
+
+        let p = 0;
+        let sip = 0;
+
+        // second search (in index)
+        const blockLen = eptr - sptr;
+        const blockBuffer = Buffer.alloc(blockLen + INDEX_BLOCK_LENGTH);
+        low = 0;
+        high = blockLen / INDEX_BLOCK_LENGTH;
+
+        const _self = this;
+
+        function _innerAsyncWhile() {
+
+            if (low <= high) {
+
+                mid = (low + high) >> 1;
+                p = mid * INDEX_BLOCK_LENGTH;
+
+                // Use this to call the method itself as
+                // an asynchronize step
+                fs.read(_self.dbFd, blockBuffer,
+                    0,
+                    blockLen + INDEX_BLOCK_LENGTH,
+                    sptr, (err) => {
+
+                        if (err) {
+                            return callBack(err, null);
+                        }
+
+                        sip = _getLong(blockBuffer, p);
+
+                        if (ip < sip) {
+                            high = mid - 1;
+                            setImmediate(_innerAsyncWhile);
+                        } else {
+                            sip = _getLong(blockBuffer, p + 4);
+                            if (ip > sip) {
+                                low = mid + 1;
+                                setImmediate(_innerAsyncWhile);
+                            } else {
+                                sip = _getLong(blockBuffer, p + 8);
+                                _self[ReadData](sip, (err, result) => {
+                                    callBack(err, result);
                                 });
-
+                            }
-    return val;
+                        }
+                    });
+            }
+            else {
+                // If we found nothing, return null
+                return callBack(null, null);
+            }
         }
 
+        _innerAsyncWhile();
+    }
 
     /**
- * get long value from buffer with specified offset
+     * Sync of MemorySearch.
- * */
+     * @param {String} ip 
-function getLong(buffer, offset) 
+     */
-{
+    memorySearchSync(ip) {
-    var val =  (   
-        (buffer[offset] & 0x000000FF) | 
-        ((buffer[offset + 1] <<  8) & 0x0000FF00) | 
-        ((buffer[offset + 2] << 16) & 0x00FF0000) |
-        ((buffer[offset + 3] << 24) & 0xFF000000)
-    );
 
-    // convert to unsigned int
+        ip = _ip2long(ip);
-    if (val < 0) {
+
-        val = val >>> 0;
+        if (this.totalInMemoryBytes === null) {
-    }
+
-    return val;
+            this.totalInMemoryBytes = Buffer.alloc(this.totalInMemoryBytesSize);
+            fs.readSync(this.dbFd, this.totalInMemoryBytes, 0, this.totalInMemoryBytesSize, 0);
+
+            this.firstIndexPtr = _getLong(this.totalInMemoryBytes, 0);
+            this.lastIndexPtr = _getLong(this.totalInMemoryBytes, 4);
+            this.totalBlocks = ((this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH) | 0 + 1;
         }
 
+        let l = 0, h = this.totalBlocks;
+        let sip = 0;
+        let m = 0, p = 0;
 
-exports.create = function(db_path) 
+        while (l <= h) {
-{
+            m = (l + h) >> 1;
-    if (typeof(db_path) == "undefined" || fs.exists(db_path) ) {
+            p = (this.firstIndexPtr + m * INDEX_BLOCK_LENGTH) | 0;
-        throw("[ip2region] db file not exists : " + db_path);
+
+            sip = _getLong(this.totalInMemoryBytes, p);
+
+            if (ip < sip) {
+                h = m - 1;
+            }
+            else {
+                sip = _getLong(this.totalInMemoryBytes, p + 4);
+                if (ip > sip) {
+                    l = m + 1;
+                }
+                else {
+                    sip = _getLong(this.totalInMemoryBytes, p + 8);
+                    //not matched
+                    if (sip === 0) return null;
+
+                    //get the data
+                    let dataLen = ((sip >> 24) & 0xFF) | 0;
+                    let dataPtr = ((sip & 0x00FFFFFF)) | 0;
+                    let city = _getLong(this.totalInMemoryBytes, dataPtr);
+
+                    const bufArray = new Array();
+                    for (let startPos = dataPtr + 4, i = startPos; i < startPos + dataLen - 4; ++i) {
+                        bufArray.push(this.totalInMemoryBytes[i]);
+                    }
+                    const region = Buffer.from(bufArray, 0).toString();
+                    return { city, region };
+                }
+            }
+        }
     }
 
-    ip2region.db_file_path = db_path; 
+    /**
+     * Async of MemorySearch.
+     * @param {String} ip 
+     */
+    memorySearch(ip, callBack) {
 
-    try {
+        let _ip = _ip2long(ip);
-        ip2region.db_fd = fs.openSync(ip2region.db_file_path, 'r');
+        let l = 0, h = this.totalBlocks;
-    } catch(e) {
+        let sip = 0;
-        throw("[ip2region] Can not open ip2region.db file , path : "
+        let m = 0, p = 0;
-                + ip2region.db_file_path);
+        let self = this;
+
+        function _innerMemorySearchLoop() {
+
+            if (l <= h) {
+
+                m = (l + h) >> 1;
+                p = (self.firstIndexPtr + m * INDEX_BLOCK_LENGTH) | 0;
+
+                sip = _getLong(self.totalInMemoryBytes, p);
+
+                if (_ip < sip) {
+                    h = m - 1;
+                    setImmediate(_innerMemorySearchLoop);
+                }
+                else {
+                    sip = _getLong(self.totalInMemoryBytes, p + 4);
+
+                    if (_ip > sip) {
+                        l = m + 1;
+                        setImmediate(_innerMemorySearchLoop);
+                    }
+                    else {
+                        sip = _getLong(self.totalInMemoryBytes, p + 8);
+                        //not matched
+                        if (sip === 0) return callBack(null, null);
+
+                        //get the data
+                        let dataLen = ((sip >> 24) & 0xFF) | 0;
+                        let dataPtr = ((sip & 0x00FFFFFF)) | 0;
+                        let city = _getLong(self.totalInMemoryBytes, dataPtr);
+
+                        const bufArray = new Array();
+                        for (let startPos = dataPtr + 4, i = startPos; i < startPos + dataLen - 4; ++i) {
+                            bufArray.push(self.totalInMemoryBytes[i]);
+                        }
+                        const region = Buffer.from(bufArray).toString();
+                        callBack(null, { city, region });
+                    }
+                }
+            }
+            else {
+                callBack(null, null);
+            }
         }
 
-    // init basic search environment
+        if (this.totalInMemoryBytes === null) {
-    if (totalBlocks == 0) {
-        fs.readSync(ip2region.db_fd, superBlock, 0, 8, 0);
-        firstIndexPtr = getLong(superBlock, 0);
-        lastIndexPtr  = getLong(superBlock, 4);
-        totalBlocks   = (lastIndexPtr - firstIndexPtr) 
-                            / indexBlockLength + 1;
-    }
 
-    return ip2region;
+            this.totalInMemoryBytes = Buffer.alloc(this.totalInMemoryBytesSize);
-}
 
-
+            fs.read(this.dbFd, this.totalInMemoryBytes, 0, this.totalInMemoryBytesSize, 0, (err) => {
-exports.destroy = function(ip2rObj)
+                if (err) {
-{
+                    callBack(err, null);
-    ip2rObj.db_file_path = null;
-    fs.closeSync(ip2rObj.db_fd);
                 }
+                else {
+                    this.firstIndexPtr = _getLong(this.totalInMemoryBytes, 0);
+                    this.lastIndexPtr = _getLong(this.totalInMemoryBytes, 4);
+                    this.totalBlocks = ((this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH) | 0 + 1;
+
+                    _innerMemorySearchLoop();
+                }
+            });
+        }
+        else {
+            _innerMemorySearchLoop();
+        }
+    }
+}
+//#endregion
+
+module.exports = IP2Region;

binding/nodejs/package.json

@@ -1,11 +1,13 @@
 {
-  "name": "ip2region",
+  "name": "lionsoul-ip2region",
   "version": "0.0.1",
   "description": "ip database ",
   "main": "ip2region.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "jest",
+    "coverage": "npm run test && jest --coverage"
   },
+  "files": ["data/"],
   "repository": {
     "type": "git",
     "url": "https://github.com/lionsoul2016/ip2region"
@@ -20,5 +22,9 @@
   "bugs": {
     "url": "https://github.com/lionsoul2016/ip2region/issues"
   },
-  "homepage": "https://github.com/lionsoul2016/ip2region"
+  "homepage": "https://github.com/lionsoul2016/ip2region",
+  "devDependencies": {
+    "jest": "^19.0.2",
+    "benchmark": "^2.1.4"
+  }
 }

binding/nodejs/test.js

@@ -1,15 +0,0 @@
-/**
- * test program
- * */
-
-var Ip2region = require('./ip2region');
-
-// 1. create a ip2region object
-var ipObj = Ip2region.create('../../data/ip2region.db');
-
-// 2. use
-//console.log(ipObj.binarySearchSync("120.24.78.68"));
-console.log(ipObj.btreeSearchSync("120.24.78.68"));
-
-// 3. destroy
-Ip2region.destroy(ipObj);

binding/nodejs/tests/benchmarkTests/main.js

@@ -0,0 +1,94 @@
+const Benchmark = require('benchmark');
+
+const suite = new Benchmark.Suite();
+const searcher = require('../../ip2region').create('../../data/ip2region.db');
+const testDatas = require('../utils/testData');
+const asyncFor = require('../utils/asyncFor');
+
+suite.add("MemorySearchSync", () => {
+    for (let i = 0; i < testDatas.length; ++i) {
+        searcher.memorySearchSync(testDatas[i]);
+    }
+})
+    .add("BinarySearchSync", () => {
+        for (let i = 0; i < testDatas.length; ++i) {
+            searcher.binarySearchSync(testDatas[i]);
+        }
+    })
+    .add("BtreeSearchSync", () => {
+        for (let i = 0; i < testDatas.length; ++i) {
+            searcher.btreeSearchSync(testDatas[i]);
+        }
+    })
+    .add("MemorySearch", {
+        defer: true,
+        fn: function (completeCallBack) {
+            asyncFor(testDatas,
+                (v, c) => {
+                    searcher.memorySearch(v, () => {
+                        c();
+                    });
+                },
+                () => {
+                    completeCallBack.resolve();
+                });
+        }
+    })
+    .add("BinarySearch", {
+        defer: true,
+        fn: function (completeCallBack) {
+            asyncFor(testDatas,
+                (v, c) => {
+                    searcher.binarySearch(v, () => {
+                        c();
+                    });
+                },
+                () => {
+                    completeCallBack.resolve();
+                });
+        }
+    })
+    .add("BtreeSearch", {
+        defer: true,
+        fn: function (completeCallBack) {
+            asyncFor(testDatas,
+                (v, c) => {
+                    searcher.btreeSearch(v, () => {
+                        c();
+                    });
+                },
+                () => {
+                    completeCallBack.resolve();
+                });
+        }
+    })
+    .on('cycle', function (event) {
+        console.log(String(event.target));
+    })
+    .on('complete', function () {
+
+        let results = new Array();
+
+        for (let prop in this) {
+            if (!isNaN(prop)) {
+                const eachResult = {
+                    name: this[prop].name,
+                    mean: this[prop].stats.mean * 1000,  //second => millisecond
+                    moe: this[prop].stats.moe,
+                    rme: this[prop].stats.rme,
+                    sem: this[prop].stats.sem
+                }
+                results.push(eachResult);
+            }
+        }
+
+        results = results.sort((a, b) => { return a.mean - b.mean });
+
+        console.log(`Rand\t${'Name'.padEnd(20)}Time (in milliseconds)`);
+        let id = 1;
+
+        for (let r of results) {
+            console.log(`${id++}\t${r.name.padEnd(20)}${r.mean.toFixed(3)}`);
+        }
+    })
+    .run({ async: true });

binding/nodejs/tests/unitTests/constructorTest.spec.js

@@ -0,0 +1,145 @@
+// This test is used for tesing of a static function `create` of IP2Region
+const IP2Region = require('../../ip2region');
+const testIps = require('../utils/testData');
+const asyncFor = require('../utils/asyncFor');
+
+describe('Constructor Test', () => {
+  let instance;
+
+  beforeAll(() => {
+    instance = new IP2Region({ dbPath: '../../data/ip2region.db' });
+  });
+
+  afterAll(() => {
+    IP2Region.destroy();
+  });
+
+  test('btreeSearchSync query', () => {
+    for (const ip of testIps) {
+      expect(instance.btreeSearchSync(ip)).toMatchSnapshot();
+    }
+  });
+
+  test('binarySearchSync query', () => {
+    for (const ip of testIps) {
+      expect(instance.binarySearchSync(ip)).toMatchSnapshot();
+    }
+  });
+
+  test('memorySearchSync query', () => {
+    for (const ip of testIps) {
+      expect(instance.memorySearchSync(ip)).toMatchSnapshot();
+    }
+  });
+
+  //#region callBack
+  test('binarySearch query', (done) => {
+    asyncFor(testIps,
+      (value, continueCallBack) => {
+        instance.binarySearch(value, (err, result) => {
+          expect(err).toBe(null);
+          expect(result).toMatchSnapshot();
+          continueCallBack();
+        });
+      },
+      () => { done() });
+  });
+
+  test('btreeSearch query', (done) => {
+    asyncFor(testIps,
+      (value, continueCallBack) => {
+        instance.btreeSearch(value, (err, result) => {
+          expect(err).toBe(null);
+          expect(result).toMatchSnapshot();
+          continueCallBack();
+        });
+      },
+      () => { done() });
+  });
+
+  test('memorySearch query', (done) => {
+    asyncFor(testIps,
+      (value, continueCallBack) => {
+        instance.memorySearch(value, (err, result) => {
+          expect(err).toBe(null);
+          expect(result).toMatchSnapshot();
+          continueCallBack();
+        });
+      },
+      () => { done() });
+  });
+
+  //#endregion
+
+  //#region Async Promisify test
+  const node_ver = require('../utils/fetchMainVersion');
+
+  // If we have Nodejs >= 8, we now support `async` and `await`
+  if (node_ver >= 8) {
+
+    const asyncBinarySearch = async (ip) => {
+
+      return new Promise((resolve, reject) => {
+        instance.binarySearch(ip, (err, result) => {
+          if (err) {
+            reject(err);
+          }
+          else {
+            resolve(result);
+          }
+        });
+      });
+
+    };
+
+    const asyncBtreeSearch = async (ip) => {
+
+      return new Promise((resolve, reject) => {
+        instance.btreeSearch(ip, (err, result) => {
+          if (err) {
+            reject(err);
+          }
+          else {
+            resolve(result);
+          }
+        });
+      });
+
+    };
+
+    const asyncMemorySearch = async (ip) => {
+      return new Promise((succ, fail) => {
+        instance.memorySearch(ip, (err, result) => {
+          if (err) {
+            fail(err);
+          }
+          else {
+            succ(result);
+          }
+        });
+      });
+    }
+    
+    test('async binarySearch query', async () => {
+      for (let i = 0; i < testIps.length; ++i) {
+        const result = await asyncBinarySearch(testIps[i]);
+        expect(result).toMatchSnapshot();
+      }
+    });
+
+    test('async btreeSearch query', async () => {
+      for (let i = 0; i < testIps.length; ++i) {
+        const result = await asyncBtreeSearch(testIps[i]);
+        expect(result).toMatchSnapshot();
+      }
+    });
+
+    test('async memorySearch query', async () => {
+      for (let i = 0; i < testIps.length; ++i) {
+        const result = await asyncMemorySearch(testIps[i]);
+        expect(result).toMatchSnapshot();
+      }
+    });
+  }
+  //#endregion
+});

binding/nodejs/tests/unitTests/createTest.spec.js

@@ -0,0 +1,146 @@
+// This test is used for tesing of a static function `create` of IP2Region
+const IP2Region = require('../../ip2region');
+const testIps = require('../utils/testData');
+const asyncFor = require('../utils/asyncFor');
+
+describe('Create Test', () => {
+  let instance;
+
+  beforeAll(() => {
+    instance = IP2Region.create('../../data/ip2region.db');
+  });
+
+  afterAll(() => {
+    IP2Region.destroy();
+  });
+
+  test('btreeSearchSync query', () => {
+    for (const ip of testIps) {
+      expect(instance.btreeSearchSync(ip)).toMatchSnapshot();
+    }
+  });
+
+  test('binarySearchSync query', () => {
+    for (const ip of testIps) {
+      expect(instance.binarySearchSync(ip)).toMatchSnapshot();
+    }
+  });
+
+  test('memorySearchSync query', () => {
+    for (const ip of testIps) {
+      expect(instance.memorySearchSync(ip)).toMatchSnapshot();
+    }
+  });
+
+  //#region callBack
+  test('binarySearch query', (done) => {
+    asyncFor(testIps,
+      (value, continueCallBack) => {
+        instance.binarySearch(value, (err, result) => {
+          expect(err).toBe(null);
+          expect(result).toMatchSnapshot();
+          continueCallBack();
+        });
+      },
+      () => { done() });
+  });
+
+  test('btreeSearch query', (done) => {
+    asyncFor(testIps,
+      (value, continueCallBack) => {
+        instance.btreeSearch(value, (err, result) => {
+          expect(err).toBe(null);
+          expect(result).toMatchSnapshot();
+          continueCallBack();
+        });
+      },
+      () => { done() });
+  });
+
+  test('memorySearch query', (done) => {
+    asyncFor(testIps,
+      (value, continueCallBack) => {
+        instance.memorySearch(value, (err, result) => {
+          expect(err).toBe(null);
+          expect(result).toMatchSnapshot();
+          continueCallBack();
+        });
+      },
+      () => { done() });
+  });
+
+
+  //#endregion
+
+  //#region Async Promisify test
+  const node_ver = require('../utils/fetchMainVersion');
+
+  // If we have Nodejs >= 8, we now support `async` and `await`
+  if (node_ver >= 8) {
+
+    const asyncBinarySearch = async (ip) => {
+
+      return new Promise((resolve, reject) => {
+        instance.binarySearch(ip, (err, result) => {
+          if (err) {
+            reject(err);
+          }
+          else {
+            resolve(result);
+          }
+        });
+      });
+
+    };
+
+    const asyncBtreeSearch = async (ip) => {
+
+      return new Promise((resolve, reject) => {
+        instance.btreeSearch(ip, (err, result) => {
+          if (err) {
+            reject(err);
+          }
+          else {
+            resolve(result);
+          }
+        });
+      });
+
+    };
+
+    const asyncMemorySearch = async (ip) => {
+      return new Promise((succ, fail) => {
+        instance.memorySearch(ip, (err, result) => {
+          if (err) {
+            fail(err);
+          }
+          else {
+            succ(result);
+          }
+        });
+      });
+    }
+
+    test('async binarySearch query', async () => {
+      for (let i = 0; i < testIps.length; ++i) {
+        const result = await asyncBinarySearch(testIps[i]);
+        expect(result).toMatchSnapshot();
+      }
+    });
+
+    test('async btreeSearch query', async () => {
+      for (let i = 0; i < testIps.length; ++i) {
+        const result = await asyncBtreeSearch(testIps[i]);
+        expect(result).toMatchSnapshot();
+      }
+    });
+
+    test('async memorySearch query', async () => {
+      for (let i = 0; i < testIps.length; ++i) {
+        const result = await asyncMemorySearch(testIps[i]);
+        expect(result).toMatchSnapshot();
+      }
+    });
+  }
+  //#endregion
+});

binding/nodejs/tests/unitTests/exceptionTest.spec.js

@@ -0,0 +1,28 @@
+// This test is used for tesing of exceptions
+
+const IP2Region = require('../../ip2region');
+
+describe('Constructor Test', () => {
+  let instance;
+
+  beforeAll(() => {
+    instance = new IP2Region({ dbPath: '../../data/ip2region.db' })
+  });
+
+  afterAll(() => {
+    instance.destroy();
+  });
+
+  test('IP invalid test', () => {
+    const invalidIps = ['255.234.233', '255.255.-1.255', null, undefined, '', 'x.255.y.200'];
+    for (const ip of invalidIps) {
+      expect(() => instance.btreeSearchSync(ip)).toThrow();
+      expect(() => instance.binarySearchSync(ip)).toThrow();
+    }
+  });
+
+  test('File Not Found test', () => {
+    expect(() => new IP2Region({ dbPath: 'A Bad File or Path Here' })).toThrow();
+  });
+
+});

binding/nodejs/tests/utils/asyncFor.js

@@ -0,0 +1,23 @@
+/**
+ * Async For
+ * @param {Array} groupArray 
+ * @param {Function} exeCallBack 
+ * @param {Function} finalCallBack 
+ */
+function asyncFor(groupArray, exeCallBack, finalCallBack) {
+
+    let i = 0;
+
+    function _innerAsyncLoop() {
+        if (i < groupArray.length) {
+            exeCallBack(groupArray[i++], _innerAsyncLoop);
+        }
+        else {
+            finalCallBack();
+        }
+    }
+
+    _innerAsyncLoop();
+}
+
+module.exports = asyncFor;

binding/nodejs/tests/utils/fetchMainVersion.js

@@ -0,0 +1,9 @@
+let node_ver = process.version
+// Because nodejs's version is something like `v8.11.3`. So we should ignore `v` first
+node_ver = node_ver.substr(1);
+// Splitted by `.`
+node_ver = node_ver.split('.');
+// Take the main version number
+node_ver = parseInt(node_ver[0]);
+
+module.exports = node_ver;

binding/nodejs/tests/utils/testData.js

@@ -0,0 +1,16 @@
+module.exports = [
+    '0.0.0.0',
+    '10.10.10.10',
+    '210.109.255.230',
+    '192.168.0.1',
+    '255.255.255.255',
+    '77.49.66.88',
+    '210.248.255.231',
+    '35.193.251.120',
+    '197.84.60.202',
+    '183.196.233.159',
+    '20.108.91.101',
+    '120.196.148.137',
+    '249.255.250.200',
+    '112.65.1.130'
+]

binding/php/Ip2Region.class.php

@@ -7,7 +7,7 @@
 */
 
 defined('INDEX_BLOCK_LENGTH')   or define('INDEX_BLOCK_LENGTH',  12);
-defined('TOTAL_HEADER_LENGTH')  or define('TOTAL_HEADER_LENGTH', 4096);
+defined('TOTAL_HEADER_LENGTH')  or define('TOTAL_HEADER_LENGTH', 8192);
 
 class Ip2Region 
 {
@@ -106,7 +106,7 @@ class Ip2Region
     }
 
     /**
-     * get the data block throught the specifield ip address or long ip numeric with binary search algorithm
+     * get the data block through the specified ip address or long ip numeric with binary search algorithm
      *
      * @param    ip
      * @return    mixed Array or NULL for any error
@@ -174,7 +174,7 @@ class Ip2Region
     }
 
     /**
-     * get the data block associated with the specifield ip with b-tree search algorithm
+     * get the data block associated with the specified ip with b-tree search algorithm
      * @Note: not thread safe
      *
      * @param   ip
@@ -266,7 +266,7 @@ class Ip2Region
         fseek($this->dbFileHandler, $sptr);
         $index = fread($this->dbFileHandler, $blockLen + INDEX_BLOCK_LENGTH);
         
-        $dataptr = 0;
+        $dataPtr = 0;
         $l = 0; $h = $blockLen / INDEX_BLOCK_LENGTH;
         while ( $l <= $h ) {
             $m = (($l + $h) >> 1);
@@ -279,18 +279,18 @@ class Ip2Region
                 if ( $ip > $eip ) {
                     $l = $m + 1;
                 } else {
-                    $dataptr = self::getLong($index, $p + 8);
+                    $dataPtr = self::getLong($index, $p + 8);
                     break;
                 }
             }
         }
         
         //not matched
-        if ( $dataptr == 0 ) return NULL;
+        if ( $dataPtr == 0 ) return NULL;
         
         //3. get the data
-        $dataLen = (($dataptr >> 24) & 0xFF);
+        $dataLen = (($dataPtr >> 24) & 0xFF);
-        $dataPtr = ($dataptr & 0x00FFFFFF);
+        $dataPtr = ($dataPtr & 0x00FFFFFF);
         
         fseek($this->dbFileHandler, $dataPtr);
         $data = fread($this->dbFileHandler, $dataLen);
@@ -358,4 +358,3 @@ class Ip2Region
         $this->HeaderPtr = NULL;
     }
 }
-?>

binding/php/testSearcher.php

@@ -8,7 +8,7 @@
 if ( $argc < 2 ) {
     $usage = <<<EOF
 Usage: php Test.php [ip2region db file] [alrogrithm]
-+-Algorithm: binary or b-tree\n
++-Optional Algorithm: binary, b-tree, memory\n
 EOF;
     exit($usage);
 }

binding/php_extension/php5/ip2region/README.md

@@ -1,10 +1,10 @@
-# ip2region 的PHP拓展(php5版本)
+# ip2region client - PHP扩展(php5版本) 
 
 ### 安装步骤
-* git clone https://github.com/lionsoul2016/ip2region.git
+* git clone https://github.com/lionsoul2014/ip2region.git
 * cd ip2region
 * cp binding/php_extension/php5/ip2region 到 php source code 的 ext 目录下
-* cp binding/c/下面所有的文件到 php source code 的ext/ip2region/lib 目录下
+* cp binding/c/ 里面所有的文件到 php source code 的 ext/ip2region/lib 目录下
 * 在 ext/ip2region 下，运行 
 
         phpize
@@ -16,7 +16,7 @@
         extension=ip2region.so
         ip2region.db_file=/path/to/ip2region.db
 
-ip2region.db 在项目根目录下的data文件夹下
+默认 ip2region.db 在项目根目录下的 data 文件夹下，如有改动，请修改 ip2region.ini 的 db_file
 
 * 测试 
 
@@ -26,4 +26,4 @@ ip2region.db 在项目根目录下的data文件夹下
 
 ### 使用
 
-参考ip2region/ip2region.php
+参考当前目录下的 ip2region.php

binding/php_extension/php5/ip2region/ip2region.c

@@ -67,10 +67,10 @@ void search(
 
 	if ( res == 1 )
 	{
-		add_assoc_long( *return_value,   "cityId", (*_block).city_id);
+		add_assoc_long( *return_value,   "city_id", (*_block).city_id);
 		add_assoc_string( *return_value, "region", (*_block).region, 1);
 	} else {
-		add_assoc_long( *return_value,   "cityId", 0);
+		add_assoc_long( *return_value,   "city_id", 0);
 		add_assoc_string( *return_value, "region", "[Error] Search Failed! Please check the  path of ip2region db file.", 1);
 	}
 }

binding/php_extension/php7/ip2region/README.md

@@ -1,10 +1,10 @@
-# ip2region 的PHP拓展(php7版本)
+# ip2region client - PHP扩展(php7版本) 
 
 ### 安装步骤
-* git clone https://github.com/lionsoul2016/ip2region.git
+* git clone https://github.com/lionsoul2014/ip2region.git
 * cd ip2region
-* cp binding/php_extension/php5/ip2region 到 php source code 的ext目录下
+* cp binding/php_extension/php7/ip2region 到 php source code 的 ext 目录下
-* cp binding/c/下面所有的文件到 php source code 的ext/ip2region/lib 目录下
+* cp binding/c/ 里面所有的文件到 php source code 的 ext/ip2region/lib 目录下
 * 在 ext/ip2region 下，运行 
 
         phpize
@@ -16,7 +16,7 @@
         extension=ip2region.so
         ip2region.db_file=/path/to/ip2region.db
 
-ip2region.db 在项目根目录下的data文件夹下
+默认 ip2region.db 在项目根目录下的 data 文件夹下，如有改动，请修改 ip2region.ini 的 db_file
 
 * 测试 
 
@@ -26,4 +26,4 @@ ip2region.db 在项目根目录下的data文件夹下
 
 ### 使用
 
-参考ip2region/ip2region.php
+参考当前目录下的 ip2region.php

binding/php_extension/php7/ip2region/ip2region.c

@@ -67,12 +67,12 @@ void search(
 
 	if ( res == 1 )
 	{
-		add_assoc_long( *return_value,   "cityId", (*_block).city_id);
+		add_assoc_long( *return_value,   "city_id", (*_block).city_id);
 		//add_assoc_string( *return_value, "region", (*_block).region, 1);
 		// for phpng
 		add_assoc_string( *return_value, "region", (*_block).region);
 	} else {
-		add_assoc_long( *return_value,   "cityId", 0);
+		add_assoc_long( *return_value,   "city_id", 0);
 		//add_assoc_string( *return_value, "region", "[Error] Search Failed! Please check the  path of ip2region db file.", 1);
 		// for phpng
 		add_assoc_string( *return_value, "region", "[Error] Search Failed! Please check the  path of ip2region db file.");

binding/python/benchmark.py

@@ -0,0 +1,54 @@
+#-*- coding:utf-8 -*-
+"""
+" ip2region python seacher client module benchmark test file
+"
+" Autho: koma<komazhang@foxmail.com>
+" Date : 2018-10-04
+"""
+import threading
+import time, sys
+
+from ip2Region import Ip2Region
+
+class BenchmarkThread(threading.Thread):
+    __searcher = None
+    __lock = None
+
+    def __init__(self, searcher, lock):
+        self.__searcher = searcher
+        self.__lock = lock
+        threading.Thread.__init__(self)
+
+    def run(self):
+        self.__lock.acquire()
+        try:
+            sTime = time.time() * 1000
+            data = self.__searcher.memorySearch("49.220.138.233")
+            eTime = time.time() * 1000
+            # @Note uncomment the print to make it more like the product environment
+            print("%s|%s in %5f millseconds" % (data["city_id"], data["region"].decode('utf-8'), eTime - sTime))
+        finally:
+            self.__lock.release()
+
+if __name__ == "__main__":
+    dbFile = "./data/ip2region.db"
+    if ( len(sys.argv) > 2 ):
+        dbFile = sys.argv[1];
+
+    threads = []
+    searcher = Ip2Region(dbFile)
+    lock = threading.Lock()
+
+    for i in range(10000):
+        t = BenchmarkThread(searcher, lock)
+        threads.append(t)
+
+    sTime = time.time() * 1000
+    for t in threads:
+        t.start()
+
+    for t in threads:
+        t.join()
+    eTime = time.time() * 1000
+
+    print("Benchmark done: %5f" % (eTime - sTime))

binding/python/ip2Region.py

@@ -8,11 +8,16 @@
 import struct, io, socket, sys
 
 class Ip2Region(object):
+    __INDEX_BLOCK_LENGTH  = 12
+    __TOTAL_HEADER_LENGTH = 8192
+
+    __f          = None
     __headerSip  = []
     __headerPtr  = []
-    __f         = None
+    __headerLen  = 0
-    __sPtr      = 0
+    __indexSPtr  = 0
-    __indexLen  = 0
+    __indexLPtr  = 0
+    __indexCount = 0
     __dbBinStr   = ''
 
     def __init__(self, dbfile):
@@ -27,34 +32,29 @@ class Ip2Region(object):
 
         if self.__dbBinStr == '':
             self.__dbBinStr   = self.__f.read() #read all the contents in file
-            self.__sPtr     = self.getLong(self.__dbBinStr, 0)
+            self.__indexSPtr  = self.getLong(self.__dbBinStr, 0)
-            endPtr          = self.getLong(self.__dbBinStr, 4)
+            self.__indexLPtr  = self.getLong(self.__dbBinStr, 4)
-            self.__indexLen = endPtr - self.__sPtr
+            self.__indexCount = int((self.__indexLPtr - self.__indexSPtr)/self.__INDEX_BLOCK_LENGTH)+1
 
-        startPtr = self.__sPtr
+        l, h, dataPtr = (0, self.__indexCount, 0)
-        indexLen = self.__indexLen
-        dbBinStr = self.__dbBinStr
-
-        l, h, mixPtr = (0, int(indexLen/12), 0)
         while l <= h:
-            m   = int((l+h)/2)
+            m = int((l+h) >> 1)
-            ptr = startPtr + m*12
+            p = self.__indexSPtr + m*self.__INDEX_BLOCK_LENGTH
+            sip = self.getLong(self.__dbBinStr, p)
 
-            sip = self.getLong(dbBinStr, ptr)
+            if ip < sip:
-            eip = self.getLong(dbBinStr, ptr+4)
-
-            if ip >= sip:
-                if ip > eip:
-                    l = m + 1
-                else:
-                    mixPtr = self.getLong(dbBinStr, ptr+8)
-                    break;
-            else:
                 h = m -1
+            else:
+                eip = self.getLong(self.__dbBinStr, p+4)
+                if ip > eip:
+                    l = m + 1;
+                else:
+                    dataPtr = self.getLong(self.__dbBinStr, p+8)
+                    break
 
-        if mixPtr == 0: return "N2"
+        if dataPtr == 0: raise Exception("Data pointer not found")
 
-        return self.returnData(mixPtr)
+        return self.returnData(dataPtr)
 
     def binarySearch(self, ip):
         """
@@ -63,41 +63,34 @@ class Ip2Region(object):
         """
         if not ip.isdigit(): ip = self.ip2long(ip)
 
-        if self.__indexLen < 1:
+        if self.__indexCount == 0:
             self.__f.seek(0)
-            b = self.__f.read(8)
+            superBlock = self.__f.read(8)
-            self.__sPtr = self.getLong(b, 0)
+            self.__indexSPtr = self.getLong(superBlock, 0)
-            endPtr      = self.getLong(b, 4)
+            self.__indexLPtr = self.getLong(superBlock, 4)
-            self.__indexLen = endPtr - self.__sPtr
+            self.__indexCount = int((self.__indexLPtr - self.__indexSPtr) / self.__INDEX_BLOCK_LENGTH) + 1
 
-        startPtr = self.__sPtr
+        l, h, dataPtr = (0, self.__indexCount, 0)
-        indexLen = self.__indexLen
-
-        self.__f.seek(startPtr)
-        b = self.__f.read(indexLen+12)
-
-        l, h, mixPtr = (0, int(indexLen/12), 0)
         while l <= h:
-            m   = int((l+h)/2)
+            m = int((l+h) >> 1)
-            ptr = startPtr + m*12
+            p = m*self.__INDEX_BLOCK_LENGTH
-            self.__f.seek(ptr)
 
-            b   = self.__f.read(12)
+            self.__f.seek(self.__indexSPtr+p)
-            sip = self.getLong(b, 0)
+            buffer = self.__f.read(self.__INDEX_BLOCK_LENGTH)
-            eip = self.getLong(b, 4)
+            sip = self.getLong(buffer, 0)
-
+            if ip < sip:
-            if ip >= sip:
+                h = m - 1
+            else:
+                eip = self.getLong(buffer, 4)
                 if ip > eip:
                     l = m + 1
                 else:
-                    mixPtr = self.getLong(b, 8)
+                    dataPtr = self.getLong(buffer, 8)
-                    break;
+                    break
-            else:
-                h = m - 1
 
-        if mixPtr == 0: return "N2"
+        if dataPtr == 0: raise Exception("Data pointer not found")
 
-        return self.returnData(mixPtr)
+        return self.returnData(dataPtr)
 
     def btreeSearch(self, ip):
         """
@@ -107,82 +100,81 @@ class Ip2Region(object):
         if not ip.isdigit(): ip = self.ip2long(ip)
 
         if len(self.__headerSip) < 1:
+            headerLen = 0
             #pass the super block
             self.__f.seek(8)
             #read the header block
-            b = self.__f.read(4086)
+            b = self.__f.read(self.__TOTAL_HEADER_LENGTH)
             #parse the header block
-            sip = None
+            for i in range(0, len(b), 8):
-            ptr = None
-            for i in range(0, len(b)-1, 8):
                 sip = self.getLong(b, i)
                 ptr = self.getLong(b, i+4)
                 if ptr == 0:
                     break
                 self.__headerSip.append(sip)
                 self.__headerPtr.append(ptr)
+                headerLen += 1
+            self.__headerLen = headerLen
 
-        headerLen = len(self.__headerSip) - 1
+        l, h, sptr, eptr = (0, self.__headerLen, 0, 0)
-        l, h, sptr, eptr = (0, headerLen, 0, 0)
         while l <= h:
-            m = int((l+h)/2)
+            m = int((l+h) >> 1)
 
             if ip == self.__headerSip[m]:
                 if m > 0:
                     sptr = self.__headerPtr[m-1]
                     eptr = self.__headerPtr[m]
-                    break;
                 else:
                     sptr = self.__headerPtr[m]
                     eptr = self.__headerPtr[m+1]
-                    break;
+                break
 
-            if ip > self.__headerSip[m]:
+            if ip < self.__headerSip[m]:
-                if m == headerLen:
-                    sptr = self.__headerPtr[m-1]
-                    eptr = self.__headerPtr[m]
-                    break;
-                elif ip < self.__headerSip[m+1]:
-                    sptr = self.__headerPtr[m]
-                    eptr = self.__headerPtr[m+1]
-                    break;
-
-                l = m + 1
-            else:
                 if m == 0:
                     sptr = self.__headerPtr[m]
                     eptr = self.__headerPtr[m+1]
-                    break;
+                    break
                 elif ip > self.__headerSip[m-1]:
                     sptr = self.__headerPtr[m-1]
                     eptr = self.__headerPtr[m]
-                    break;
+                    break
-
                 h = m - 1
+            else:
+                if m == self.__headerLen - 1:
+                    sptr = self.__headerPtr[m-1]
+                    eptr = self.__headerPtr[m]
+                    break
+                elif ip <= self.__headerSip[m+1]:
+                    sptr = self.__headerPtr[m]
+                    eptr = self.__headerPtr[m+1]
+                    break
+                l = m + 1
 
-        if sptr == 0: return "N1"
+        if sptr == 0: raise Exception("Index pointer not found")
 
         indexLen = eptr - sptr
         self.__f.seek(sptr)
-        b = self.__f.read(indexLen + 12)
+        index = self.__f.read(indexLen + self.__INDEX_BLOCK_LENGTH)
         
-        l, h, mixPtr = (0, int(indexLen/12), 0)
+        l, h, dataPrt = (0, int(indexLen/self.__INDEX_BLOCK_LENGTH), 0)
         while l <= h:
-            m = int((l+h)/2)
+            m = int((l+h) >> 1)
-            offset = m * 12
+            offset = int(m * self.__INDEX_BLOCK_LENGTH)
+            sip = self.getLong(index, offset)
 
-            if ip >= self.getLong(b, offset):
+            if ip < sip:
-                if ip > self.getLong(b, offset+4):
-                    l = m + 1
-                else:
-                    mixPtr = self.getLong(b, offset+8)
-                    break;
-            else:
                 h = m - 1
+            else:
+                eip = self.getLong(index, offset+4)
+                if ip > eip:
+                    l = m + 1;
+                else:
+                    dataPrt = self.getLong(index, offset+8)
+                    break
 
-        if mixPtr == 0: return "N2"
+        if dataPrt == 0: raise Exception("Data pointer not found")
 
-        return self.returnData(mixPtr)
+        return self.returnData(dataPrt)
 
     def initDatabase(self, dbfile):
         """
@@ -191,17 +183,17 @@ class Ip2Region(object):
         """
         try:
             self.__f = io.open(dbfile, "rb")
-        except IOError, e:
+        except IOError as e:
-            print "[Error]: ", e
+            print("[Error]: %s" % e)
             sys.exit()
 
-    def returnData(self, dsptr):
+    def returnData(self, dataPtr):
         """
         " get ip data from db file by data start ptr
         " param: dsptr
         """
-        dataPtr = dsptr & 0x00FFFFFFL
+        dataLen = (dataPtr >> 24) & 0xFF
-        dataLen = (dsptr >> 24) & 0xFF
+        dataPtr = dataPtr & 0x00FFFFFF
 
         self.__f.seek(dataPtr)
         data = self.__f.read(dataLen)
@@ -213,7 +205,6 @@ class Ip2Region(object):
 
     def ip2long(self, ip):
         _ip = socket.inet_aton(ip)
-
         return struct.unpack("!L", _ip)[0]
 
     def isip(self, ip):
@@ -230,11 +221,12 @@ class Ip2Region(object):
     def getLong(self, b, offset):
         if len(b[offset:offset+4]) == 4:
             return struct.unpack('I', b[offset:offset+4])[0]
-
         return 0
 
     def close(self):
-        self.__headerSip = None
+        if self.__f != None:
-        self.__headerPtr = None
             self.__f.close()
-        self.__f         = None
+
+        self.__dbBinStr  = None
+        self.__headerPtr = None
+        self.__headerSip = None

binding/python/testSearcher.py

@@ -6,72 +6,76 @@
 " Date : 2015-11-06
 """
 import struct, sys, os, time
+from platform import python_version
+
 from ip2Region import Ip2Region
 
 def testSearch():
     """
     " ip2region test function
     """
-    llen = len(sys.argv)
+    argLen     = len(sys.argv)
+    version    = python_version()
+    algorithms = ["binary", "b-tree", "memory"]
 
-    if llen < 2:
+    if argLen < 2:
-        print "Usage: python ip2Region.py [ip2region db file] [alrogrithm]"
+        print("Usage: python testSearcher.py [ip2region db file] [alrogrithm]")
-        print "Algorithm: binary or b-tree"
+        print("Algorithm: %s" % ", ".join(algorithms))
         return 0
 
     dbFile = sys.argv[1]
-    method    = 1
-    algorithm = "b-tree"
 
     if (not os.path.isfile(dbFile)) or (not os.path.exists(dbFile)):
-        print "[Error]: Specified db file is not exists."
+        print("[Error]: Specified db file is not exists.")
         return 0
 
-    if llen > 2:
+    if argLen > 2:
         algorithm = sys.argv[2]
-        if algorithm == "binary":
+    try:
-            method = 2
+        algorithms.index(algorithm)
-        elif algorithm == "memory":
+    except Exception as e:
-            method = 3
+        algorithm = "b-tree"
 
-    print "initializing %s..." % (algorithm)
+    print("initializing %s..." % (algorithm))
-    print "+----------------------------------+"
+    print("+----------------------------------+")
-    print "| ip2region test program           |"
+    print("| ip2region test program           |")
-    print "| Author: chenxin619315@gmail.com. |"
+    print("| Author: chenxin619315@gmail.com. |")
-    print "| Type 'quit' to exit program      |"
+    print("| Type 'quit' to exit program      |")
-    print "+----------------------------------+"
+    print("+----------------------------------+")
 
-    searcher = Ip2Region(dbFile);
+    searcher = Ip2Region(dbFile)
 
     while True:
+        if version[:1] == "2":
             line = raw_input("ip2region>> ")
+        else:
+            line = input("ip2region>> ")
         line = line.strip()
 
         if line == "":
-            print "[Error]: Invalid ip address."
+            print("[Error]: Invalid ip address.")
             continue
 
         if line == "quit":
-            print "[Info]: Thanks for your use, Bye."
+            print("[Info]: Thanks for your use, Bye.")
             break
 
         if not searcher.isip(line):
-            print "[Error]: Invalid ip address."
+            print("[Error]: Invalid ip address.")
             continue
 
+        try:
             sTime = time.time()*1000
-        if method == 1:
+            if algorithm == "binary":
-            data = searcher.btreeSearch(line)
-        elif method == 2:
                 data = searcher.binarySearch(line)
-        else:
+            elif algorithm == "memory":
                 data = searcher.memorySearch(line)
-        eTime = time.time() * 1000
-
-        if isinstance(data, dict):
-            print "%s|%s in %f millseconds" % (data["city_id"], data["region"], eTime-sTime)
             else:
-            print "[Error]: ", data
+                data = searcher.btreeSearch(line)
+            eTime = time.time()*1000
+            print("%s|%s in %5f millseconds" % (data["city_id"], data["region"].decode('utf-8'), eTime - sTime))
+        except Exception as e:
+            print("[Error]: %s" % e)
 
     searcher.close()
 

binding/rust/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "ip2region"
+version = "0.2.0"
+authors = ["biluohc <biluohc@qq.com>"]
+
+include = ["./*", "../../data/ip2region.db", "../../Cargo.toml"]
+
+[[bin]]
+name="ip2region"
+path="src/main.rs"
+
+[dependencies]
+lazy_static ={ version = "^1", optional = true }
+
+[features]
+lazy = ["lazy_static"]
+

binding/rust/example/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "example"
+version = "0.1.0"
+authors = ["biluohc <biluohc@qq.com>"]
+
+[dependencies]
+
+[dependencies.ip2region]
+path = "../"
+# git = "https://github.com/lionsoul2014/ip2region"
+# git = "https://github.com/biluohc/ip2region"
+version = "*"
+features = ["lazy"]

binding/rust/example/src/main.rs

@@ -0,0 +1,114 @@
+extern crate ip2region;
+
+use ip2region::*;
+
+use std::env;
+use std::time::Instant;
+
+// cargo run --release ../../../data/ip2region.db
+
+static IPS: &'static [&'_ str] = &[
+    "117.136.105.202",
+    "47.95.47.253",
+    "127.0.0.1",
+    "10.0.0.1",
+    "1.1.1.1",
+];
+
+fn main() {
+    lazy();
+
+    overview();
+}
+
+fn lazy() {
+    for ip in IPS {
+        let start = Instant::now();
+        let res = memory_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("lazy__ {:06} microseconds: {:?}", end, res);
+
+        let start = Instant::now();
+        let ip_addr = ip.parse().unwrap();
+        let res2 = memory_search_ip(&ip_addr);
+        let end = start.elapsed().subsec_micros();
+        println!("lazy__ {:06} microseconds: {:?}", end, res2);
+
+        if res.is_ok() && res2.is_ok() {
+            assert_eq!(res.unwrap(), res2.unwrap());
+        } else if res.is_err() && res2.is_err() {
+        } else {
+            panic!("not EQ")
+        }
+    }
+}
+
+fn overview() {
+    let args = env::args().skip(1).collect::<Vec<String>>();
+    let db_path = &args[0];
+
+    let mut ip2 = Ip2Region::new(db_path).unwrap();
+    let ip2o = ip2.to_owned().unwrap();
+
+    for ip in IPS {
+        // mem
+        let start = Instant::now();
+        let res = ip2o.memory_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("memory {:06} microseconds: {:?}", end, res);
+
+        let start = Instant::now();
+        let ip_addr = ip.parse().unwrap();
+        let res2 = ip2o.memory_search_ip(&ip_addr);
+        let end = start.elapsed().subsec_micros();
+        println!("memory {:06} microseconds: {:?}", end, res2);
+
+        if res.is_ok() && res2.is_ok() {
+            assert_eq!(res.unwrap(), res2.unwrap());
+        } else if res.is_err() && res2.is_err() {
+        } else {
+            panic!("not EQ")
+        }
+
+        // binary
+        let start = Instant::now();
+        let res = ip2.binary_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("binary {:06} microseconds: {:?}", end, res);
+
+        let start = Instant::now();
+        let ip_addr = ip.parse().unwrap();
+        let res2 = ip2.binary_search_ip(&ip_addr);
+        let end = start.elapsed().subsec_micros();
+        println!("binary {:06} microseconds: {:?}", end, res2);
+
+        if res.is_ok() && res2.is_ok() {
+            assert_eq!(res.unwrap(), res2.unwrap());
+        } else if res.is_err() && res2.is_err() {
+        } else {
+            panic!("not EQ")
+        }
+
+        // btree
+        let start = Instant::now();
+        let res = ip2.btree_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("btree  {:06} microseconds: {:?}", end, res);
+
+        let start = Instant::now();
+        let ip_addr = ip.parse().unwrap();
+        let res2 = ip2.btree_search_ip(&ip_addr);
+        let end = start.elapsed().subsec_micros();
+        println!("btree_ {:06} microseconds: {:?}", end, res2);
+
+        if res.is_ok() && res2.is_ok() {
+            assert_eq!(res.unwrap(), res2.unwrap());
+        } else if res.is_err() && res2.is_err() {
+        } else {
+            panic!("not EQ")
+        }
+
+        // \n
+        println!();
+    }
+}

binding/rust/readme.md

@@ -0,0 +1,36 @@
+## Rust 客户端
+
+## 用法
+
+Demo： 在 `example` 目录里
+
+API文档： `cargo doc --features lazy --open` 可以看到所有。 
+
+运行测试： `cargo test --features lazy` 
+
+### 添加依赖
+
+注意 `#` 是 toml格式的注释，文件前三行的 `path` 和 `git` 是引用包的方式，`path` 是按路径引用包，`git`  是按git项目地址，按实际情况选一个。
+
+```toml
+[dependencies.ip2region]
+git = "https://github.com/lionsoul2014/ip2region"
+# git = "https://github.com/biluohc/ip2region"
+# path = "../"
+version = "*"
+# features = ["lazy"]
+```
+
+### 代码
+查看 `example/src/main.rs` 
+
+### `lazy` feature 把 DB 直接打包进二进制
+
+取消上面 toml 的 `# features = ["lazy"]` 行的注释即可使用，其 api 是 `memory_search` 和  `memory_search_ip`。
+
+只是目前 DB 足有3.2M，还是有些感人的。
+
+关键的一行是 `features = ["lazy"]` ，不需要则可以注释或者删掉。
+
+
+

binding/rust/src/db.rs

@@ -0,0 +1,7 @@
+pub const DB_PATH: &str = concat!(env!("CARGO_MANIFEST_DIR"), "/../../data/ip2region.db");
+
+#[cfg(feature = "lazy")]
+pub static DB_BYTES: &'static [u8] = include_bytes!(concat!(
+    env!("CARGO_MANIFEST_DIR"),
+    "/../../data/ip2region.db"
+));

binding/rust/src/error.rs

@@ -0,0 +1,44 @@
+use std::{self, io, net, str};
+
+pub type Result<T> = std::result::Result<T, Error>;
+
+#[derive(Debug)]
+pub enum Error {
+    Io(io::Error),
+    Utf8(str::Utf8Error),
+    Addr(net::AddrParseError),
+    /// `224.0.0.0` ~ `239.255.255.255`
+    ///
+    // `ff00::/8`
+    IpIsMulticast,
+    /// `0.0.0.0`
+    IpIsUnspecified,
+    /// `127.0.0.0/8`
+    IpIsLoopback,
+    ///1. `10.0.0.0/8`
+    ///
+    ///2. `172.16.0.0/12`
+    ///
+    ///3. `192.168.0.0/16`
+    IpIsPrivate,
+    /// Unsupport Ipv6 Now
+    UnsupportIpv6,
+    NotFound,
+}
+
+impl From<io::Error> for Error {
+    fn from(e: io::Error) -> Self {
+        Error::Io(e)
+    }
+}
+impl From<str::Utf8Error> for Error {
+    fn from(e: str::Utf8Error) -> Self {
+        Error::Utf8(e)
+    }
+}
+
+impl From<net::AddrParseError> for Error {
+    fn from(e: net::AddrParseError) -> Self {
+        Error::Addr(e)
+    }
+}

binding/rust/src/lazy.rs

@@ -0,0 +1,20 @@
+use super::DB_BYTES;
+
+lazy_static! {
+    static ref OWNED_IP_2_REGION: OwnedIp2Region = {
+        OwnedIp2Region {
+            db_bin_bytes: Cow::Borrowed(DB_BYTES),
+            first_index_ptr: get_u32(&DB_BYTES[..], 0),
+            total_blocks: (get_u32(&DB_BYTES[..], 4) - get_u32(&DB_BYTES[..], 0))
+                / INDEX_BLOCK_LENGTH + 1,
+        }
+    };
+}
+
+pub fn memory_search<S: AsRef<str>>(ip_str: S) -> Result<IpInfo<'static>> {
+    OWNED_IP_2_REGION.memory_search(ip_str)
+}
+
+pub fn memory_search_ip(ip_addr: &IpAddr) -> Result<IpInfo> {
+    OWNED_IP_2_REGION.memory_search_ip(ip_addr)
+}

binding/rust/src/lib.rs

@@ -0,0 +1,375 @@
+#[cfg(feature = "lazy")]
+#[macro_use]
+extern crate lazy_static;
+
+use std::cell::RefCell;
+use std::fs::File;
+use std::io::{self, Read, Seek, SeekFrom};
+use std::net::IpAddr;
+use std::{fmt, str};
+
+mod db;
+mod error;
+pub use error::{Error, Result};
+mod owned;
+
+#[doc(hidden)]
+pub use db::DB_PATH;
+pub use owned::{OwnedIp2Region, OwnedIpInfo};
+
+#[cfg(feature = "lazy")]
+use db::DB_BYTES;
+#[cfg(feature = "lazy")]
+pub use owned::{memory_search, memory_search_ip};
+
+const INDEX_BLOCK_LENGTH: u32 = 12;
+const TOTAL_HEADER_LENGTH: usize = 8192;
+
+thread_local!(static BUF: RefCell<[u8;256]> = RefCell::new([0;256]));
+thread_local!(static BUF_BTREE: RefCell<[u8;TOTAL_HEADER_LENGTH]> = RefCell::new([0;TOTAL_HEADER_LENGTH]));
+
+#[allow(non_snake_case)]
+#[derive(Debug, Default, Clone, PartialEq)]
+pub struct IpInfo<'a> {
+    pub city_id: u32,
+    pub country: &'a str,
+    pub region: &'a str,
+    pub province: &'a str,
+    pub city: &'a str,
+    pub ISP: &'a str,
+}
+
+impl<'a> IpInfo<'a> {
+    fn new(city_id: u32, fields: &[&'a str]) -> Self {
+        if fields.len() < 5 {
+            panic!(format!("invlid fields: {:?}", fields));
+        }
+        IpInfo {
+            country: fields[0],
+            region: fields[1],
+            province: fields[2],
+            city: fields[3],
+            ISP: fields[4],
+            city_id,
+        }
+    }
+    pub fn to_owned(&self) -> OwnedIpInfo {
+        OwnedIpInfo {
+            city_id: self.city_id,
+            country: self.country.to_owned(),
+            region: self.region.to_owned(),
+            province: self.province.to_owned(),
+            city: self.city.to_owned(),
+            ISP: self.ISP.to_owned(),
+        }
+    }
+}
+
+impl<'a> fmt::Display for IpInfo<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "{}|{}|{}|{}|{}|{}",
+            self.city_id, self.country, self.region, self.province, self.city, self.ISP
+        )
+    }
+}
+
+fn get_ip_info(city_id: u32, line: &[u8]) -> Result<IpInfo> {
+    let str = str::from_utf8(line)?;
+    let fields = str.split('|').collect::<Vec<&str>>();
+    Ok(IpInfo::new(city_id, &fields[..]))
+}
+
+fn get_u32(bytes: &[u8], offset: u32) -> u32 {
+    let offset = offset as usize;
+    let tmp = (bytes[offset] as i64) & 0x000000FF
+        | ((bytes[offset + 1] as i64) << 8) & 0x0000FF00
+        | ((bytes[offset + 2] as i64) << 16) & 0x00FF0000
+        | ((bytes[offset + 3] as i64) << 24) & 0xFF000000;
+    tmp as u32
+}
+
+fn ip2u32(ip: &IpAddr) -> Result<u32> {
+    if ip.is_ipv6() {
+        return Err(Error::UnsupportIpv6);
+    }
+    if ip.is_unspecified() {
+        return Err(Error::IpIsUnspecified);
+    }
+    if ip.is_loopback() {
+        return Err(Error::IpIsLoopback);
+    }
+    if ip.is_multicast() {
+        return Err(Error::IpIsMulticast);
+    }
+
+    match ip {
+        IpAddr::V4(v4) => {
+            if v4.is_private() {
+                return Err(Error::IpIsPrivate);
+            }
+
+            let mut sum: u32 = 0;
+            for (i, n) in v4.octets().iter().enumerate() {
+                sum += (*n as u32) << 24 - 8 * i;
+            }
+            return Ok(sum);
+        }
+        IpAddr::V6(_v6) => unreachable!(),
+    }
+}
+
+pub struct Ip2Region {
+    // db file handler
+    db_file: File,
+
+    //header block info
+    header_sip: Vec<u32>,
+    header_ptr: Vec<u32>,
+    header_len: u32,
+
+    // super block index info
+    first_index_ptr: u32,
+    last_index_ptr: u32,
+    total_blocks: u32,
+}
+
+impl Ip2Region {
+    pub fn new(path: &str) -> io::Result<Self> {
+        let file = File::open(path)?;
+        Ok(Ip2Region {
+            db_file: file,
+            header_sip: Vec::new(),
+            header_ptr: Vec::new(),
+            header_len: 0,
+
+            first_index_ptr: 0,
+            last_index_ptr: 0,
+            total_blocks: 0,
+        })
+    }
+    pub fn to_owned(&mut self) -> Result<OwnedIp2Region> {
+        OwnedIp2Region::new2(&mut self.db_file).map_err(Error::Io)
+    }
+
+    pub fn binary_search<S: AsRef<str>>(&mut self, ip_str: S) -> Result<OwnedIpInfo> {
+        let ip = ip_str.as_ref().parse::<IpAddr>()?;
+        self.binary_search_ip(&ip)
+    }
+    pub fn binary_search_ip(&mut self, ip_addr: &IpAddr) -> Result<OwnedIpInfo> {
+        BUF.with(|buf| {
+            let mut buf = buf.borrow_mut();
+
+            if self.total_blocks == 0 {
+                self.db_file.seek(SeekFrom::Start(0))?;
+                self.db_file.read_exact(&mut buf[..8])?;
+                self.first_index_ptr = get_u32(&buf[..8], 0);
+                self.last_index_ptr = get_u32(&buf[..8], 4);
+                self.total_blocks =
+                    (self.last_index_ptr - self.first_index_ptr) / INDEX_BLOCK_LENGTH + 1;
+            }
+            let ip = ip2u32(ip_addr)?;
+            let mut h = self.total_blocks;
+            let (mut data_ptr, mut l) = (0u32, 0u32);
+            while l <= h {
+                let m = (l + h) >> 1;
+                let p = self.first_index_ptr + m * INDEX_BLOCK_LENGTH;
+                self.db_file.seek(SeekFrom::Start(p as u64))?;
+                self.db_file
+                    .read_exact(&mut buf[0..INDEX_BLOCK_LENGTH as usize])?;
+                let sip = get_u32(&buf[..INDEX_BLOCK_LENGTH as usize], 0);
+                if ip < sip {
+                    h = m - 1;
+                } else {
+                    let eip = get_u32(&buf[..INDEX_BLOCK_LENGTH as usize], 4);
+                    if ip > eip {
+                        l = m + 1;
+                    } else {
+                        data_ptr = get_u32(&buf[..INDEX_BLOCK_LENGTH as usize], 8);
+                        break;
+                    }
+                }
+            }
+            if data_ptr == 0 {
+                Err(Error::NotFound)?;
+            }
+
+            let data_len = (data_ptr >> 24) & 0xff;
+            data_ptr = data_ptr & 0x00FFFFFF;
+
+            self.db_file.seek(SeekFrom::Start(data_ptr as u64))?;
+            self.db_file.read_exact(&mut buf[0..data_len as usize])?;
+
+            get_ip_info(
+                get_u32(&buf[..data_len as usize], 0),
+                &buf[4..data_len as usize],
+            ).map(|i| i.to_owned())
+        })
+    }
+
+    pub fn btree_search<S: AsRef<str>>(&mut self, ip_str: S) -> Result<OwnedIpInfo> {
+        let ip = ip_str.as_ref().parse::<IpAddr>()?;
+        self.btree_search_ip(&ip)
+    }
+    pub fn btree_search_ip(&mut self, ip_addr: &IpAddr) -> Result<OwnedIpInfo> {
+        BUF_BTREE.with(|buf| {
+            let mut buf = buf.borrow_mut();
+
+            if self.header_len == 0 {
+                self.db_file.seek(SeekFrom::Start(8))?;
+                self.db_file.read_exact(&mut buf[0..TOTAL_HEADER_LENGTH])?;
+
+                let (mut i, mut idx) = (0, 0);
+                while i < TOTAL_HEADER_LENGTH {
+                    let sip = get_u32(&buf[0..TOTAL_HEADER_LENGTH], i as u32);
+                    let idx_ptr = get_u32(&buf[0..TOTAL_HEADER_LENGTH], i as u32 + 4);
+                    if idx_ptr == 0 {
+                        break;
+                    }
+                    self.header_sip.push(sip);
+                    self.header_ptr.push(idx_ptr);
+                    i += 8;
+                    idx += 1;
+                }
+                self.header_len = idx
+            }
+
+            let ip = ip2u32(ip_addr)?;
+            let mut h = self.header_len;
+            let (mut sptr, mut eptr, mut l) = (0u32, 0u32, 0u32);
+
+            while l <= h {
+                let m = (l + h) >> 1;
+                if m < self.header_len {
+                    if ip == self.header_sip[m as usize] {
+                        if m > 0 {
+                            sptr = self.header_ptr[m as usize - 1];
+                            eptr = self.header_ptr[m as usize];
+                        } else {
+                            sptr = self.header_ptr[m as usize];
+                            eptr = self.header_ptr[m as usize + 1];
+                        }
+                        break;
+                    }
+                    if ip < self.header_sip[m as usize] {
+                        if m == 0 {
+                            sptr = self.header_ptr[m as usize];
+                            eptr = self.header_ptr[m as usize + 1];
+                            break;
+                        } else if ip > self.header_sip[m as usize - 1] {
+                            sptr = self.header_ptr[m as usize - 1];
+                            eptr = self.header_ptr[m as usize];
+                            break;
+                        }
+                        h = m - 1
+                    } else {
+                        if m == self.header_len - 1 {
+                            println!("m/hl: {}/{}", m, self.header_len);
+                            sptr = self.header_ptr[m as usize - 1];
+                            eptr = self.header_ptr[m as usize];
+                            break;
+                        } else if ip <= self.header_sip[m as usize + 1] {
+                            sptr = self.header_ptr[m as usize];
+                            eptr = self.header_ptr[m as usize + 1];
+                            break;
+                        }
+                        l = m + 1
+                    }
+                }
+            }
+
+            if sptr == 0 {
+                Err(Error::NotFound)?;
+            }
+            let block_len = eptr - sptr;
+            self.db_file.seek(SeekFrom::Start(sptr as u64))?;
+            let buf_size = (block_len + INDEX_BLOCK_LENGTH) as usize;
+            self.db_file.read_exact(&mut buf[..buf_size])?;
+
+            let mut data_ptr = 0;
+            h = block_len / INDEX_BLOCK_LENGTH;
+            l = 0;
+
+            while l <= h {
+                let m = (l + h) >> 1;
+                let p = m * INDEX_BLOCK_LENGTH;
+                let sip = get_u32(&buf[..buf_size], p);
+                if ip < sip {
+                    h = m - 1;
+                } else {
+                    let eip = get_u32(&buf[..buf_size], p + 4);
+                    if ip > eip {
+                        l = m + 1;
+                    } else {
+                        data_ptr = get_u32(&buf[..buf_size], p + 8);
+                        break;
+                    }
+                }
+            }
+            if data_ptr == 0 {
+                Err(Error::NotFound)?;
+            }
+
+            let data_len = (data_ptr >> 24) & 0xff;
+            data_ptr = data_ptr & 0x00FFFFFF;
+
+            self.db_file.seek(SeekFrom::Start(data_ptr as u64))?;
+            self.db_file.read_exact(&mut buf[0..data_len as usize])?;
+
+            get_ip_info(
+                get_u32(&buf[..data_len as usize], 0),
+                &buf[4..data_len as usize],
+            ).map(|i| i.to_owned())
+        })
+    }
+}
+
+//  cargo test --features lazy  -- --nocapture
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let mut ip2 = Ip2Region::new(DB_PATH).unwrap();
+        let ip2o = ip2.to_owned().unwrap();
+
+        for ip in vec![
+            "117.136.105.202",
+            "47.95.47.253",
+            "127.0.0.1",
+            "10.0.0.1",
+            "1.1.1.1",
+        ] {
+            #[cfg(feature = "lazy")]
+            {
+                println!("lzay__: {:?}", memory_search(ip));
+                if ip2o.memory_search(ip).is_ok() {
+                    assert_eq!(ip2o.memory_search(ip).unwrap(), memory_search(ip).unwrap());
+                } else {
+                    assert!(memory_search(ip).is_err());
+                }
+            }
+
+            println!("memory: {:?}", ip2o.memory_search(ip));
+            println!("binary: {:?}", ip2.binary_search(ip));
+            println!("btree : {:?}", ip2.btree_search(ip));
+
+            if ip2o.memory_search(ip).is_ok() {
+                assert_eq!(
+                    ip2o.memory_search(ip).unwrap().to_owned(),
+                    ip2.binary_search(ip).unwrap()
+                );
+                assert_eq!(
+                    ip2o.memory_search(ip).unwrap().to_owned(),
+                    ip2.btree_search(ip).unwrap()
+                );
+            } else {
+                assert!(ip2.binary_search(ip).is_err());
+                assert!(ip2.btree_search(ip).is_err());
+            }
+            println!();
+        }
+    }
+}

binding/rust/src/main.rs

@@ -0,0 +1,130 @@
+extern crate ip2region;
+
+use ip2region::*;
+use std::env;
+use std::io::{self, *};
+use std::time::Instant;
+
+// cargo run --release --features lazy
+fn main() {
+    let args = env::args().skip(1).collect::<Vec<String>>();
+
+    println!(
+        r#"ip2region cli test
++-----------------------------------------------------------------+
+| ip2region  [db_file] [alrogrithm]                                               
+| format  :  [ip] [alrogrithm]'                                     
+| overview:  cargo run --release" 
+| usage:     cargo run --release -- [db_file] [alrogrithm]"
+| exit:      quit or exit or Ctrl+C                
++-----------------------------------------------------------------+`"#
+    );
+
+    if !args.is_empty() {
+        let db_path = if args[0] != "." { &args[0] } else { DB_PATH };
+
+        let mut ip2 = Ip2Region::new(db_path).unwrap();
+        let ip2o = ip2.to_owned().unwrap();
+
+        let alg = if args.len() > 1 {
+            args[1].to_lowercase()
+        } else {
+            "memory".to_lowercase()
+        };
+        let mut buf = String::with_capacity(256);
+
+        loop {
+            buf.clear();
+
+            print!("ip2region>>");
+            io::stdout().flush().unwrap();
+
+            let line = match io::stdin().read_line(&mut buf) {
+                Ok(_) => buf.trim(),
+                Err(e) => panic!("[Fatal]: Read String from Stdin Error: {:?}", e),
+            };
+
+            if line.is_empty() {
+                continue;
+            }
+
+            if line == "quit" || line == "exit" {
+                println!("[Info]: Thanks for your use, Bye.");
+                break;
+            }
+
+            let ip_alg = line
+                .split_whitespace()
+                .filter(|s| !s.is_empty())
+                .collect::<Vec<&str>>();
+            let alg = if ip_alg.len() > 1 {
+                ip_alg[1].to_owned()
+            } else {
+                alg.clone()
+            };
+
+            let start = Instant::now();
+            let res = match alg.as_str() {
+                "memory" => ip2o.memory_search(ip_alg[0]).map(|o| o.to_owned()),
+                "binary" => ip2.binary_search(ip_alg[0]),
+                "btree" | "b-tree" => ip2.btree_search(ip_alg[0]),
+
+                miss => {
+                    eprintln!("Not have the Algorithm: {:?}", miss);
+                    continue;
+                }
+            };
+            let end = start.elapsed().subsec_micros();
+
+            match res {
+                Ok(i) => {
+                    println!("[{:6} {:06} microseconds]: {}", alg, end, i);
+                }
+
+                Err(e) => {
+                    eprintln!("[Error]: {:?}", e);
+                }
+            };
+        }
+    } else {
+        overview()
+    }
+}
+
+fn overview() {
+    let mut ip2 = Ip2Region::new(DB_PATH).unwrap();
+    let ip2o = ip2.to_owned().unwrap();
+
+    for ip in &[
+        "117.136.105.202",
+        "47.95.47.253",
+        "127.0.0.1",
+        "10.0.0.1",
+        "1.1.1.1",
+    ] {
+        let start = Instant::now();
+        let res = ip2o.memory_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("memory {:06} microseconds: {:?}", end, res);
+
+        #[cfg(feature = "lazy")]
+        {
+            let start = Instant::now();
+            let res = memory_search(ip);
+            let end = start.elapsed().subsec_micros();
+            println!("lazy__ {:06} microseconds: {:?}", end, res);
+        }
+
+        let start = Instant::now();
+        let res = ip2.binary_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("binary {:06} microseconds: {:?}", end, res);
+
+        let start = Instant::now();
+        let res = ip2.btree_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("btree  {:06} microseconds: {:?}", end, res);
+
+        println!();
+    }
+}

binding/rust/src/owned.rs

@@ -0,0 +1,106 @@
+use super::*;
+use std::borrow::Cow;
+
+#[cfg(feature = "lazy")]
+include!("lazy.rs");
+
+#[allow(non_snake_case)]
+#[derive(Debug, Default, Clone, PartialEq)]
+pub struct OwnedIpInfo {
+    pub city_id: u32,
+    pub country: String,
+    pub region: String,
+    pub province: String,
+    pub city: String,
+    pub ISP: String,
+}
+
+impl OwnedIpInfo {
+    pub fn as_ref<'a>(&'a self) -> IpInfo<'a> {
+        IpInfo {
+            city_id: self.city_id,
+            country: &self.country,
+            region: &self.region,
+            province: &self.province,
+            city: &self.city,
+            ISP: &self.ISP,
+        }
+    }
+}
+
+impl fmt::Display for OwnedIpInfo {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self.as_ref())
+    }
+}
+
+pub struct OwnedIp2Region {
+    // super block index info
+    first_index_ptr: u32,
+    // last_index_ptr: u32,
+    total_blocks: u32,
+    db_bin_bytes: Cow<'static, [u8]>,
+}
+
+impl OwnedIp2Region {
+    pub fn new(path: &str) -> io::Result<Self> {
+        let mut file = File::open(path)?;
+        Self::new2(&mut file)
+    }
+    pub(crate) fn new2(file: &mut File) -> io::Result<Self> {
+        let file_size = file.metadata()?.len();
+        let mut bytes = Vec::with_capacity(file_size as usize);
+        file.read_to_end(&mut bytes)?;
+
+        let first_index_ptr = get_u32(&bytes[..], 0);
+        let last_index_ptr = get_u32(&bytes[..], 4);
+        let total_blocks = (last_index_ptr - first_index_ptr) / INDEX_BLOCK_LENGTH + 1;
+
+        let db_bin_bytes = Cow::Owned(bytes);
+
+        Ok(OwnedIp2Region {
+            first_index_ptr,
+            total_blocks,
+            db_bin_bytes,
+        })
+    }
+
+    pub fn memory_search<S: AsRef<str>>(&self, ip_str: S) -> Result<IpInfo> {
+        let ip = ip_str.as_ref().parse()?;
+        self.memory_search_ip(&ip)
+    }
+
+    pub fn memory_search_ip(&self, ip_addr: &IpAddr) -> Result<IpInfo> {
+        let ip = ip2u32(ip_addr)?;
+        let mut h = self.total_blocks;
+        let (mut data_ptr, mut l) = (0u32, 0u32);
+        while l <= h {
+            let m = (l + h) >> 1;
+            let p = self.first_index_ptr + m * INDEX_BLOCK_LENGTH;
+
+            let sip = get_u32(&self.db_bin_bytes[..], p);
+            if ip < sip {
+                h = m - 1;
+            } else {
+                let eip = get_u32(&self.db_bin_bytes[..], p + 4);
+                if ip > eip {
+                    l = m + 1;
+                } else {
+                    data_ptr = get_u32(&self.db_bin_bytes[..], p + 8);
+                    break;
+                }
+            }
+        }
+
+        if data_ptr == 0 {
+            Err(Error::NotFound)?;
+        }
+
+        let data_len = (data_ptr >> 24) & 0xff;
+        data_ptr = data_ptr & 0x00FFFFFF;
+        get_ip_info(
+            get_u32(&self.db_bin_bytes[..], data_ptr),
+            &self.db_bin_bytes[(data_ptr + 4) as usize..(data_ptr + data_len) as usize],
+        )
+    }
+}