准确率99.9%的ip地址定位库

准确率99.9%的ip地址定位库，0.0x毫秒级查询，数据库文件大小只有1.5M，提供了java,php,c,python,nodejs,golang,c#查询绑定和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！

/**
 * default ip2region implementation
 *
 * @see        #ip2region.h
 * @author    chenxin
 * @date    2015-10-30
*/

#include “ip2region.h“
#include 
#include 

/**
 * create a new ip2region object
 *
 * @param    dbFile path
*/
IP2R_API uint_t ip2region_create（ip2region_t ip2rObj char *dbFile）
{
    memset（ip2rObj 0x00 sizeof（ip2region_entry））;
    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;
    }

    //open the db file
    ip2rObj->dbHandler = fopen（dbFile “rb“）;
    if （ ip2rObj->dbHandler == NULL  ） {
        IP2R_FREE（ip2rObj->HeaderSip）;
        IP2R_FREE（ip2rObj->HeaderPtr）;
        //fprintf（stderr “Fail to open the db file %s\n“ ip2rObj>dbFile）;
        //exit（-1）;
        return 0;
    }

    ip2rObj->firstIndexPtr = 0;
    ip2rObj->lastIndexPtr  = 0;
    ip2rObj->totalBlocks   = 0;
    ip2rObj->dbBinStr      = NULL;

    return 1;
}

/**
 * destroy the specifield ip2region object
 *
 * @param    ip2region_t
*/
IP2R_API uint_t ip2region_destroy（ip2region_t ip2rObj）
{
    IP2R_FREE（ip2rObj->HeaderSip）;
    ip2rObj->HeaderSip = NULL;
    IP2R_FREE（ip2rObj->HeaderPtr）;
    ip2rObj->HeaderPtr = NULL;

    //close the db file resource
    if （ ip2rObj->dbHandler != NULL ） {
        fclose（ip2rObj->dbHandler）;
        ip2rObj->dbHandler = NULL;
    }

    //free the db binary string
    if （ ip2rObj->dbBinStr != NULL ） {
        IP2R_FREE（ip2rObj->dbBinStr）;
        ip2rObj->dbBinStr = NULL;
    }

    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_memory_search（ip2region_t ip2rObj uint_t ip datablock_t datablock） 
{
    int l h m p;
    uint_t sip eip dptr;
    int dataLen dataptr;
    long filesize;
    char *buffer;

    if （ ip2rObj->dbBinStr == NULL ） {
        //get the size of the file
        fseek（ip2rObj->dbHandler 0 SEEK_END）;
        filesize = ftell（ip2rObj->dbHandler）;
        fseek（ip2rObj->dbHandler 0 SEEK_SET）;

        //alloc the buffer size
        ip2rObj->dbBinStr = IP2R_MALLOC（filesize）;
        if （ ip2rObj->dbBinStr == NULL ） {
            return 0;
        }

        //now read the whole file
        if （ fread（ip2rObj->dbBinStr filesize 1 ip2rObj->dbHandler） != 1 ） {
            return 0;
        }

        buffer = ip2rObj->dbBinStr;
        ip2rObj->firstIndexPtr = getUnsignedInt（buffer 0）;
        ip2rObj->lastIndexPtr  = getUnsignedInt（buffer 4）;
        ip2rObj->totalBlocks   = （ip2rObj->lastIndexPtr-ip2rObj->firstIndexPtr）/INDEX_BLOCK_LENGTH + 1;
    }

    l = 0; h = ip2rObj->totalBlocks; dptr = 0;
    while

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-07-03 12:04  ip2region-master\
     文件         341  2018-07-03 12:04  ip2region-master\.gitignore
     文件        2264  2018-07-03 12:04  ip2region-master\CHANGES.md
     文件          63  2018-07-03 12:04  ip2region-master\Cargo.toml
     文件       12640  2018-07-03 12:04  ip2region-master\LICENSE.md
     文件        4665  2018-07-03 12:04  ip2region-master\README.md
     目录           0  2018-07-03 12:04  ip2region-master\binding\
     目录           0  2018-07-03 12:04  ip2region-master\binding\c#\
     目录           0  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region\
     文件       13380  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region\DBSearcher.cs
     文件        1899  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region\DataBlock.cs
     文件        1639  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region\DbConfig.cs
     文件         406  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region\DbMakerConfigException.cs
     文件        1552  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region\HeaderBlock.cs
     文件         987  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region\IP2Region.csproj
     文件        2527  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region\IndexBlock.cs
     文件        4405  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region\Util.cs
     目录           0  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region_ConsoleTest\
     目录           0  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region_ConsoleTest\DBFile\
     文件     2724501  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region_ConsoleTest\DBFile\ip2region.db
     文件         646  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region_ConsoleTest\IP2Region_ConsoleTest.csproj
     文件        1869  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region_ConsoleTest\Program.cs
     目录           0  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region_ConsoleTest\Properties\
     目录           0  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region_ConsoleTest\Properties\PublishProfiles\
     文件         627  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region_ConsoleTest\Properties\PublishProfiles\FolderProfile.pubxml
     文件         389  2018-07-03 12:04  ip2region-master\binding\c#\IP2Region_ConsoleTest\Properties\PublishProfiles\FolderProfile.pubxml.user
     目录           0  2018-07-03 12:04  ip2region-master\binding\c\
     文件         506  2018-07-03 12:04  ip2region-master\binding\c\Makefile
     文件       11363  2018-07-03 12:04  ip2region-master\binding\c\ip2region.c
     文件        3484  2018-07-03 12:04  ip2region-master\binding\c\ip2region.h
     文件        2644  2018-07-03 12:04  ip2region-master\binding\c\testSearcher.c
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