c++实现加载so动态库中的资源_C/C++

c++实现加载so动态库中的资源

2021-04-25 14:18C++教程网 C/C++

下面小编就为大家带来一篇c++实现加载so动态库中的资源。小编觉得挺不错的，现在就分享给大家，也给大家做个参考。一起跟随小编过来看看吧

实例如下：

									sor">#include <stdio.h> 

									#include <dlfcn.h> 

									#include <stdlib.h> 

									#include <iostream> 

									//编译命令 g++ -m32 EncodeOrDecode.cpp -ldl -o edcode

									//名字通过nm -D xxxxxx.so获取

									using namespace std;

									int main(int argc,char **argv){

									void *handle = dlopen("./libpub_com_service.so",RTLD_LAZY);

									if(!handle){

									printf("open libpub error ,dlerror=%s\n",dlerror());

									return -1;

									}

									string src = "05d7151349b7fe9b54306d90f9c938b3";

									string desKey = "pub.%?d5";//58

									printf("start ..src=[%s].....size=[%d].\n",src.c_str(),src.size());

									//encode 

									typedef string (*encode_t)(const string encodeSrc,const string encodeKey);

									encode_t encode = (encode_t)dlsym(handle,"_ZN10NS_PUB_API9DesEncodeESsSs");

									if(!encode){

									printf("not found encode function ,dlerror= %s \n",dlerror());

									dlclose(handle);

									return -1;

									}

									string encodeStr = encode(src,desKey);

									printf("get the encode function success ..encodeStr=[%s].....size=[%d]\n",encodeStr.c_str(),encodeStr.size());

									//decode 

									typedef bool (*decode_t)(const string decodeSrc,const string decodeKey,string &outResult);

									decode_t decode = (decode_t)dlsym(handle,"_ZN10NS_PUB_API9DesDecodeESsSsRSs");

									if(!decode){

									printf("not found decode function ,dlerror= %s \n",dlerror());

									dlclose(handle);

									return -1;

									}

									string decodeOut;

									bool ret = decode(encodeStr,desKey,decodeOut);

									printf("get the decode function success ...ret=[%d]...decodeOut=[%s].....size=[%d]\n",ret,decodeOut.c_str(),decodeOut.size());

									//end

									dlclose(handle);

									return 0;

									}