commit 6af6fe15f9f95440736b854c2fe3f66baab77854 Author: Daniel Tam Date: Sun Sep 3 13:48:58 2017 -0500 Created program with params diff --git a/server/.gitignore b/server/.gitignore new file mode 100644 index 0000000..4d294b6 --- /dev/null +++ b/server/.gitignore @@ -0,0 +1 @@ +cardnet diff --git a/server/argh.h b/server/argh.h new file mode 100644 index 0000000..9585355 --- /dev/null +++ b/server/argh.h @@ -0,0 +1,328 @@ +#pragma once + +#include +#include +#include +#include +#include +#include +#include + +namespace argh +{ + // Terminology: + // A command line is composed of 2 types of args: + // 1. Positional args, i.e. free standing values + // 2. Options: args beginning with '-'. We identify two kinds: + // 2.1: Flags: boolean options => (exist ? true : false) + // 2.2: Parameters: a name followed by a non-option value + +#if !defined(__GNUC__) || (__GNUC__ >= 5) + using string_stream = std::istringstream; +#else + // Until GCC 5, istringstream did not have a move constructor. + // stringstream_proxy is used instead, as a workaround. + class stringstream_proxy + { + public: + stringstream_proxy() = default; + + // Construct with a value. + stringstream_proxy(std::string const& value) : + stream_(value) + {} + + // Copy constructor. + stringstream_proxy(const stringstream_proxy& other) : + stream_(other.stream_.str()) + { + stream_.setstate(other.stream_.rdstate()); + } + + void setstate(std::ios_base::iostate state) { stream_.setstate(state); } + + // Stream out the value of the parameter. + // If the conversion was not possible, the stream will enter the fail state, + // and operator bool will return false. + template + stringstream_proxy& operator >> (T& thing) + { + stream_ >> thing; + return *this; + } + + + // Get the string value. + std::string str() const { return stream_.str(); } + + std::stringbuf* rdbuf() const { return stream_.rdbuf(); } + + // Check the state of the stream. + // False when the most recent stream operation failed + operator bool() const { return !!stream_; } + + ~stringstream_proxy() = default; + private: + std::istringstream stream_; + }; + using string_stream = stringstream_proxy; +#endif + + class parser + { + public: + enum Mode { PREFER_FLAG_FOR_UNREG_OPTION = 1 << 0, + PREFER_PARAM_FOR_UNREG_OPTION = 1 << 1, + NO_SPLIT_ON_EQUALSIGN = 1 << 2, + SINGLE_DASH_IS_MULTIFLAG = 1 << 3, + }; + + parser() = default; + parser(int argc, const char* const argv[], int mode = PREFER_FLAG_FOR_UNREG_OPTION) + { + parse(argc, argv, mode); + } + + void add_param(std::string const& name); + void parse(int argc, const char* const argv[], int mode = PREFER_FLAG_FOR_UNREG_OPTION); + + std::multiset const& flags() const { return flags_; } + std::map const& params() const { return params_; } + std::vector const& pos_args() const { return pos_args_; } + + ////////////////////////////////////////////////////////////////////////// + // Accessors + + // flag (boolean) accessors: return true if the flag appeared, otherwise false. + bool operator[](std::string const& name); + + // returns positional arg string by order. Like argv[] but without the options + std::string const& operator[](size_t ind); + + // returns a std::istream that can be used to convert a positional arg to a typed value. + string_stream operator()(size_t ind); + + // same as above, but with a default value in case the arg is missing (index out of range). + template + string_stream operator()(size_t ind, T&& def_val); + + // parameter accessors, give a name get an std::istream that can be used to convert to a typed value. + // call .str() on result to get as string + string_stream operator()(std::string const& name); + + // same as above, but with a default value in case the param was missing. + // Non-string def_val types must have an operator<<() (output stream operator) + // If T only has an input stream operator, pass the string version of the type as in "3" instead of 3. + template + string_stream operator()(std::string const& name, T&& def_val); + + private: + string_stream bad_stream() const; + std::string trim_leading_dashes(std::string const& name); + bool is_number(std::string const& arg); + bool is_option(std::string const& arg); + + private: + std::vector args_; + std::map params_; + std::vector pos_args_; + std::multiset flags_; + std::set registeredParams_; + std::string empty_; + }; + + + ////////////////////////////////////////////////////////////////////////// + + void parser::parse(int argc, const char* const argv[], int mode /*= PREFER_FLAG_FOR_UNREG_OPTION*/) + { + // convert to strings + args_.resize(argc); + std::transform(argv, argv + argc, args_.begin(), [](const char* const arg) { return arg; }); + + // parse line + for (auto i = 0u; i < args_.size(); ++i) + { + if (!is_option(args_[i])) + { + pos_args_.emplace_back(args_[i]); + continue; + } + + auto name = trim_leading_dashes(args_[i]); + + if (!(mode & NO_SPLIT_ON_EQUALSIGN)) + { + auto equalPos = name.find('='); + if (equalPos != std::string::npos) + { + params_.insert({ name.substr(0, equalPos), name.substr(equalPos + 1) }); + continue; + } + } + + // if the option is unregistered and should be a multi-flag + if (1 == (args_[i].size() - name.size()) && // single dash + argh::parser::SINGLE_DASH_IS_MULTIFLAG & mode && // multi-flag mode + registeredParams_.find(name) == registeredParams_.end()) // unregistered + { + for (auto const& c : name) + { + flags_.emplace(std::string{ c }); + } + } + + // any potential option will get as its value the next arg, unless that arg is an option too + // in that case it will be determined a flag. + if (i == args_.size() - 1 || is_option(args_[i + 1])) + { + flags_.emplace(name); + continue; + } + + // if 'name' is a pre-registered option, then the next arg cannot be a free parameter to it is skipped + // otherwise we have 2 modes: + // PREFER_FLAG_FOR_UNREG_OPTION: a non-registered 'name' is determined a flag. + // The following value (the next arg) will be a free parameter. + // + // PREFER_PARAM_FOR_UNREG_OPTION: a non-registered 'name' is determined a parameter, the next arg + // will be the value of that option. + + if (registeredParams_.find(name) != registeredParams_.end() || + argh::parser::PREFER_PARAM_FOR_UNREG_OPTION & mode) + { + params_.insert({ name, args_[i + 1] }); + ++i; // skip next value, it is not a free parameter + continue; + } + + if (argh::parser::PREFER_FLAG_FOR_UNREG_OPTION & mode) + flags_.emplace(name); + }; + } + + ////////////////////////////////////////////////////////////////////////// + + string_stream parser::bad_stream() const + { + string_stream bad; + bad.setstate(std::ios_base::failbit); + return bad; + } + + ////////////////////////////////////////////////////////////////////////// + + bool parser::is_number(std::string const& arg) + { + // inefficient but simple way to determine if a string is a number (which can start with a '-') + std::istringstream istr(arg); + double number; + istr >> number; + return !(istr.fail() || istr.bad()); + } + + ////////////////////////////////////////////////////////////////////////// + + bool parser::is_option(std::string const& arg) + { + assert(0 != arg.size()); + if (is_number(arg)) + return false; + return '-' == arg[0]; + } + + ////////////////////////////////////////////////////////////////////////// + + std::string parser::trim_leading_dashes(std::string const& name) + { + auto pos = name.find_first_not_of('-'); + return name.substr(pos); + } + + ////////////////////////////////////////////////////////////////////////// + + bool parser::operator[](std::string const& name) + { + return flags_.end() != flags_.find(trim_leading_dashes(name)); + } + + ////////////////////////////////////////////////////////////////////////// + + std::string const& parser::operator[](size_t ind) + { + if (ind < pos_args_.size()) + return pos_args_[ind]; + return empty_; + } + + ////////////////////////////////////////////////////////////////////////// + + string_stream parser::operator()(std::string const& name) + { + if (name.empty()) + return bad_stream(); + + auto optIt = params_.find(trim_leading_dashes(name)); + if (params_.end() == optIt) + return bad_stream(); + + return string_stream(optIt->second); + } + + ////////////////////////////////////////////////////////////////////////// + + template + string_stream parser::operator()(std::string const& name, T&& def_val) + { + if (name.empty()) + { + std::ostringstream ostr; + ostr << def_val; + return string_stream(ostr.str()); + } + + auto optIt = params_.find(trim_leading_dashes(name)); + if (params_.end() == optIt) + { + std::ostringstream ostr; + ostr << def_val; + return string_stream(ostr.str()); + } + + return string_stream(optIt->second); + } + + ////////////////////////////////////////////////////////////////////////// + + string_stream parser::operator()(size_t ind) + { + if (pos_args_.size() <= ind) + return bad_stream(); + + return string_stream(pos_args_[ind]); + } + + ////////////////////////////////////////////////////////////////////////// + + template + string_stream parser::operator()(size_t ind, T&& def_val) + { + if (pos_args_.size() <= ind) + { + std::ostringstream ostr; + ostr << def_val; + return string_stream(ostr.str()); + } + + return string_stream(pos_args_[ind]); + } + + ////////////////////////////////////////////////////////////////////////// + + void parser::add_param(std::string const& name) + { + registeredParams_.insert(trim_leading_dashes(name)); + } +} + + diff --git a/server/cardnet.cpp b/server/cardnet.cpp new file mode 100644 index 0000000..fd09a6d --- /dev/null +++ b/server/cardnet.cpp @@ -0,0 +1,66 @@ +#include +#include +#include "argh.h" + +void exampleMessage(); + +int main (int argc, char* argv[]) +{ + std::string file, check; + //std::string check = "" ; + int port = 0; + + argh::parser cmdl; + cmdl.parse(argc, argv, argh::parser::PREFER_PARAM_FOR_UNREG_OPTION); + + if(cmdl["-h"]) // help + { + exampleMessage(); + } + + for(auto& param: cmdl.params()) + { + if(!param.first.compare("f")) // card0 file + { + file = param.second; + } + if(!param.first.compare("c")) // checker file + { + check = param.second; + } + if(!param.first.compare("p")) // port + { + try + { + port = stoi(param.second); // convert to int + if (port < 1 || port > 65535) // validate port number + exampleMessage(); + } + catch (std::invalid_argument) + { + exampleMessage(); + } + } + } + + if(file == "" || check == "" || port == 0) + exampleMessage(); + + std::cout << "File:\t" << file << std::endl; + std::cout << "Check:\t" << check << std::endl; + std::cout << "Port:\t" << port << std::endl; + + + return 0; +} + +void exampleMessage() +{ + std::cout << "Availble options:" << std::endl; + std::cout << " -f\tLocation of card0.txt file" << std::endl; + std::cout << " -c\tLocation of check file" << std::endl; + std::cout << " -p\tPort number to listen on (1-65535)" << std::endl; + std::cout << std::endl << "Example usage: cardnet.exe -f G:\\card0.txt -c G:\\check.txt -p 4500" << std::endl; + exit(0); + +} \ No newline at end of file diff --git a/server/cardnet.exe b/server/cardnet.exe new file mode 100755 index 0000000..c7b811e Binary files /dev/null and b/server/cardnet.exe differ