问题描述
我需要生成一个 perl 模块 Vinod::StatHandler.我有 2 个与 C++ 代码相关的文件.(statHandler.h,statHandler.cpp)
I need to generate a perl module Vinod::StatHandler. I have 2 files related to c++ code.(statHandler.h,statHandler.cpp)
目前我正在使用以下命令来生成模块.
Currently I am using the following command to generate the module.
swig -perl -noproxy -c++ -o StatHandler_wrap.cxx StatHandler.i
它生成了模块 StatHandler.pm
It generated the module StatHandler.pm
我使用以下命令生成了 .so 文件.
I generated the .so file using the following commands.
g++ -c statHandler.h statHandler.cpp -fPIC
g++ -O2 -shared -o StatHandler.so statHandler.o
仅包含use StatHandler;"就出现以下错误在测试 Perl 脚本中.
I got the following error by just including "use StatHandler;" in a test Perl script.
Can't find 'boot_StatHandler' symbol in /home/vinod/cpp/swig//StatHandler.so
LD_LIBRARY_PATH 设置正确.我试图通读 SWIG 文档,但并没有从中得到多少.
LD_LIBRARY_PATH is set properly. I tried to go through the SWIG documentation and I didn't get much from it.
我应该在 StatHandler.i 文件中指定什么来生成包Vinod::StatHandler".我需要为 swig 提供任何其他选项吗?
What should I specify in StatHandler.i file to generate the package "Vinod::StatHandler".Do I need to provide any other options for swig?
StatHandler.i 的内容:
Contents of StatHandler.i:
%module "Vinod::StatHandler"
%{
#include "statHandler.h"
%}
#ifdef STATIC
%include perlmain.i
#endif
class StatHandler {
StatHandler(string _dirName, string _statsFile):_statsDir(_dirName),_finalStatsFile(_statsFile){};
void printStats();
};
statHandler.h 的内容:
Contents of statHandler.h:
#ifndef STATHANDLER_H_
#define STATHANDLER_H_
#include<iostream>
#include<string.h>
#include<map>
#include<vector>
using namespace std;
class StatHandler {
private:
string _statsDir;
string _finalStatsFile;
vector<string> _statFiles;
map <string, int> _dailyStats;
public:
StatHandler(string _dirName, string _statsFile):_statsDir(_dirName),_finalStatsFile(_statsFile){};
bool getAllStatFiles();
void extractStats();
void printStats();
};
#endif
StatHandlers.cpp 的内容:
contents of StatHandlers.cpp:
#include <iostream>
#include "statHandler.h"
#include <sys/types.h>
#include <dirent.h>
#include <fstream>
#include <cstdlib>
using namespace std;
bool StatHandler::getAllStatFiles() {
DIR* dirHandler;
struct dirent* statsFile;
if(dirHandler=opendir(_statsDir.c_str())){
while(statsFile = readdir(dirHandler)){
size_t size=strlen(statsFile->d_name);
if(size>3) {
char extension[4];
memcpy(extension, &(statsFile->d_name[size-3]), 3);
extension[3]='\0';
if(strcmp(extension,".st") == 0) {
_statFiles.push_back(_statsDir+statsFile->d_name);
}
}
}
} else {
return false;
}
return true;
}
void StatHandler::extractStats() {
getAllStatFiles();
for(vector<string>::iterator fileIter=_statFiles.begin();fileIter!=_statFiles.end();++fileIter) {
cout<<*(fileIter)<<"\n";
ifstream in;
in.open(fileIter->c_str(), ios::in);
string term;
while( in.is_open() && !getline(in, term, '\n').eof() ){
size_t pos=0;
if( (pos=term.find(" ")) != string::npos) {
string keyword = term.substr(0,pos);
string countStr=term.substr(pos+1);
int count = atoi(countStr.c_str());
if(_dailyStats.find(keyword) != _dailyStats.end()) {
_dailyStats[keyword]+=count;
} else {
_dailyStats[keyword]=count;
}
}
term.clear();
}
in.close();
}
}
void StatHandler::printStats() {
ofstream out;
out.open(_finalStatsFile.c_str(), ios::out);
if(out) {
for(map<string, int>::iterator statIter=_dailyStats.begin(); statIter!=_dailyStats.end();++statIter) {
out<<statIter->first<<"\t"<<statIter->second<<"\n";
}
out.close();
}
}
int main(int argc, char** argv) {
StatHandler sh("/home/vinod/cpp/swig/","/home/vinod/cpp/swig/finalStats");
sh.extractStats();
sh.printStats();
return 0;
}
推荐答案
实际上,您忘记编译由swig
包装器>.
Actually, you forgot to compile the wrapper that gets generated by swig
.
如SWIG Doc 所述,您需要:
swig -perl -noproxy -c++ -o StatHandler_wrap.cxx StatHandler.i
g++ -c StatHandler.cpp -fPIC
g++ -c StatHandler_wrap.cxx -I /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/CORE -fPIC
g++ -O2 -shared -o StatHandler.so StatHandler.o StatHandler_wrap.o
然后,如果您将整个内容放在 Vinod/
子目录中,LD_LIBRARY_PATH="Vinod" perl -MVinod::StatHandler
将按预期工作.
Then, provided you put the whole thing in the Vinod/
subdir, LD_LIBRARY_PATH="Vinod" perl -MVinod::StatHandler
will works as expected.
注意:我在您的各种文件中编辑了大小写和复数,因为它们不一致.
NB: I edited the case and plural in your various files, as they were inconsistent.
这篇关于使用 SWIG 生成具有单独命名空间的 perl 模块的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!