c 动态加载so c++实现加载so动态库中的资源

#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;

}