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#ifndef COMMAND_LINE_ARGS_H
#define COMMAND_LINE_ARGS_H
/******************************************************************************
* Command-line parsing
******************************************************************************/
#include <map>
#include <algorithm>
#include <string>
#include <cstring>
#include <sstream>
class b3CommandLineArgs
{
protected:
std::map<std::string, std::string> pairs;
public:
// Constructor
b3CommandLineArgs(int argc, char **argv)
{
addArgs(argc, argv);
}
void addArgs(int argc, char **argv)
{
for (int i = 1; i < argc; i++)
{
std::string arg = argv[i];
if ((arg.length() < 2) || (arg[0] != '-') || (arg[1] != '-'))
{
continue;
}
std::string::size_type pos;
std::string key, val;
if ((pos = arg.find('=')) == std::string::npos)
{
key = std::string(arg, 2, arg.length() - 2);
val = "";
}
else
{
key = std::string(arg, 2, pos - 2);
val = std::string(arg, pos + 1, arg.length() - 1);
}
//only add new keys, don't replace existing
if (pairs.find(key) == pairs.end())
{
pairs[key] = val;
}
}
}
bool CheckCmdLineFlag(const char *arg_name)
{
std::map<std::string, std::string>::iterator itr;
if ((itr = pairs.find(arg_name)) != pairs.end())
{
return true;
}
return false;
}
template <typename T>
bool GetCmdLineArgument(const char *arg_name, T &val);
int ParsedArgc()
{
return pairs.size();
}
};
template <typename T>
inline bool b3CommandLineArgs::GetCmdLineArgument(const char *arg_name, T &val)
{
std::map<std::string, std::string>::iterator itr;
if ((itr = pairs.find(arg_name)) != pairs.end())
{
std::istringstream strstream(itr->second);
strstream >> val;
return true;
}
return false;
}
template <>
inline bool b3CommandLineArgs::GetCmdLineArgument<char *>(const char *arg_name, char *&val)
{
std::map<std::string, std::string>::iterator itr;
if ((itr = pairs.find(arg_name)) != pairs.end())
{
std::string s = itr->second;
val = (char *)malloc(sizeof(char) * (s.length() + 1));
std::strcpy(val, s.c_str());
return true;
}
else
{
val = NULL;
}
return false;
}
#endif //COMMAND_LINE_ARGS_H
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