98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
//A Test to read Config files
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// The Config File Should be a text file
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// and the content as follows
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// key=value
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#include <iostream>
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#include <fstream>
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#include <string>
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typedef void (*pfun)();//The Function Pointer
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static bool readCfgFile(const char * cfgfilePath,const std::string &key,std::string &value){
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//Open The Config File
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std::fstream cfgfile;
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cfgfile.open(cfgfilePath);
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if(!cfgfile.is_open()){
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std::cout<<"Failed to open the file!"<<std::endl;
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return false;
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}
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//Read each line of config file and get value
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char tmp[1000];
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while(!cfgfile.eof()){
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cfgfile.getline(tmp,1000);
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std::string line(tmp);
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std::size_t pos = line.find('=');//Get the position of '='
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if(pos == std::string::npos){
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cfgfile.close();
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return false;
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}
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std::string tmpkey=line.substr(0,pos);
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if(tmpkey == key){
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value=line.substr(pos+1);
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cfgfile.close();
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return true;
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}
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}
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cfgfile.close();
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return false;
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}
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static void readcfg(){
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//Input Config File Path and Key
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char filename[1000];
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std::string cfgkey,cfgvalue;
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std::cout<<"Input Config File Name"<<std::endl;//Config File Name
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std::cin.clear();//Clear the cin to read line
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std::cin.getline(filename,1000);
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std::cout<<"Input Config Key"<<std::endl;//Config Key
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std::cin>>cfgkey;
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//Get The Config
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if(readCfgFile(filename,cfgkey,cfgvalue)){
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std::cout<<"The Config Of "<<cfgkey<<" is "<<cfgvalue<<std::endl;
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}else{
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std::cout<<"Failed to Read Config!"<<std::endl;
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}
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}
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static void appendcfg(){
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//Input Config File Path and Key
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char filename[1000];
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std::string cfgkey,cfgvalue;
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std::cout<<"Input Config File Name"<<std::endl;
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std::cin.clear();//Clear the cin to read line
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std::cin.getline(filename,1000);
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//Append Config
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std::fstream cfgfile;
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cfgfile.open(filename,std::ios_base::app);
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if(cfgfile.is_open()){
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std::cout<<"Input Config Key And Config Value"<<std::endl;
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std::cin>>cfgkey>>cfgvalue;
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cfgfile<<cfgkey<<"="<<cfgvalue<<std::endl;
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cfgfile.close();
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}else{
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std::cout<<"Config File Open Failed!"<<std::endl;
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}
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}
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int main(int argc,char **argv){
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//Function Pointer to select mode
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pfun feature[]={readcfg,appendcfg};
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//Get Selection and execute a mode
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int selection;
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std::cout<<"0.Read a Config 1.Append a Config"<<std::endl<<"Selection a mode:";
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std::cin>>selection;
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feature[selection]();
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return 0;
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}
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