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