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| #include <string>
#include <vector>
#include <map>
#include <exception>
#include <utility>
#include <algorithm>
#include <iostream>
class ArgumentParser
{
struct Option {
std::string name;
std::string shortcut;
std::string defaultValue;
bool valueMandatory;
};
std::map< std::string, std::string > m_options;
std::vector< Option > m_possible;
void AddOption(std::string const & iName, std::string const & iDefaultValue, bool iValueMandatory)
{
Option option;
option.name = iName;
option.shortcut = iName.substr(0,1);
option.defaultValue = iDefaultValue;
option.valueMandatory = iValueMandatory;
m_possible.push_back(option);
}
public:
ArgumentParser()
{}
virtual ~ArgumentParser()
{}
void AddOption(std::string const & iName)
{
AddOption(iName,std::string(""),false);
}
void AddOption(std::string const & iName, char * const iDefaultValue)
{
AddOption(iName,std::string(iDefaultValue),false);
}
void AddOption(std::string const & iName, std::string const & iDefaultValue)
{
AddOption(iName,iDefaultValue,false);
}
void AddOption(std::string const & iName, bool iValueMandatory)
{
AddOption(iName,std::string(""),iValueMandatory);
}
void ParseCommandeLine(int iArgc, char * iArgv[])
{
std::vector< std::string > cmdContent;
for(int i = 0; i < iArgc; i++)
cmdContent.push_back(std::string(iArgv[i]));
for(std::vector< Option >::iterator it = m_possible.begin(); it != m_possible.end(); it++)
{
std::vector< std::string >::iterator foundOption;
std::string pattern = std::string("--") + it -> name;
foundOption = std::find(cmdContent.begin(), cmdContent.end(), pattern);
if(foundOption == cmdContent.end() )
{
pattern = std::string("-") + it -> shortcut;
foundOption = std::find(cmdContent.begin(), cmdContent.end(), pattern);
}
if(foundOption != cmdContent.end() )
{
std::vector< std::string >::iterator nextText = foundOption + 1;
bool hasNext = (nextText != cmdContent.end());
bool nextIsOption = hasNext ? (nextText -> substr(0,1) == "-") : true;
if(it -> valueMandatory && nextIsOption)
{
throw std::exception("Valeur obligatoire pour une option n'a pas été spécifiée");
}
else
{
if(nextIsOption)
m_options.insert(std::make_pair(it -> name, it -> defaultValue));
else
m_options.insert(std::make_pair(it -> name, *nextText));
}
}
}
}
bool HasValue(std::string const & iName)
{
return (0 < m_options.count(iName));
}
bool GetValue(std::string const & iName, std::string& iValue)
{
bool result = HasValue(iName);
if(result)
iValue = m_options[iName];
return result;
}
};
int main(int argc, char* argv[])
{
ArgumentParser options;
options.AddOption("help");
options.AddOption("roger","ouai");
options.AddOption("marcel",true);
options.ParseCommandeLine(argc,argv);
if(options.HasValue("help"))
{
std::cout << "Affichage de l'aide !" << std::endl;
}
else
{
std::string RogerValue;
if(options.GetValue("roger",RogerValue))
std::cout << "Roger vaut : " << RogerValue << std::endl;
std::string MarcelValue;
if(options.GetValue("marcel",MarcelValue))
std::cout << "Marcel vaut : " << MarcelValue << std::endl;
}
return 0;
} |
Analyser les paramètres passés à un programme
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Envoyé par Steph_ng8
A méditer: La solution la plus simple est toujours la moins compliquée
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