poafloc

Parser Of Arguments For Lines Of Commands

git clone git://git.dimitrijedobrota.com/poafloc.git

example_cpp.cpp (3107B)

0 #include <cstdint> 1 #include <iostream> 2 #include <vector> 3 4 #include <poafloc/poafloc.hpp> 5 6 using namespace poafloc; // NOLINT 7 8 void error(const std::string& message) 9 { 10 std::cerr << message << std::endl; 11 } 12 13 struct arguments_t 14 { 15 const char* output_file = "stdout"; 16 const char* input_file = "stdin"; 17 18 bool debug = false; 19 bool hex = false; 20 bool relocatable = false; 21 22 std::vector<const char*> args; 23 }; 24 25 int parse_opt(int key, const char* arg, Parser* parser) 26 { 27 auto* arguments = static_cast<arguments_t*>(parser->input()); 28 29 switch (key) 30 { 31 case 777: 32 arguments->debug = true; 33 break; 34 case 'h': 35 if (arguments->relocatable) error("cannot mix -hex and -relocatable"); 36 arguments->hex = true; 37 break; 38 case 'r': 39 if (arguments->hex) error("cannot mix -hex and -relocatable"); 40 arguments->relocatable = true; 41 break; 42 case 'o': 43 arguments->output_file = arg != nullptr ? arg : "stdout"; 44 break; 45 case 'i': 46 arguments->input_file = arg; 47 break; 48 case Key::ARG: 49 arguments->args.push_back(arg); 50 break; 51 case Key::ERROR: 52 help(parser, stderr, STD_ERR); 53 break; 54 default: 55 break; 56 } 57 58 return 0; 59 } 60 61 // clang-format off 62 static const option_t options[] = { 63 { nullptr, 'R', nullptr, 0, "random 0-group option"}, 64 { nullptr, 0, nullptr, 0, "Program mode", 1}, 65 {"relocatable", 'r', nullptr, 0, "Output in relocatable format"}, 66 { "hex", 'h', nullptr, 0, "Output in hex format"}, 67 {"hexadecimal", 0, nullptr, ALIAS | HIDDEN}, 68 { nullptr, 0, nullptr, 0, "For developers", 4}, 69 { "debug", 777, nullptr, 0, "Enable debugging mode"}, 70 { nullptr, 0, nullptr, 0, "Input/output", 3}, 71 { "output", 'o', "file", ARG_OPTIONAL, "Output file, default stdout"}, 72 { nullptr, 'i', "file", 0, "Input file"}, 73 { nullptr, 0, nullptr, 0, "Informational Options", -1}, 74 {}, 75 }; 76 77 static const arg_t argp = { 78 options, parse_opt, "doc string\nother usage", 79 "First half of the message\vsecond half of the message" 80 }; 81 // clang-format on 82 83 int main(int argc, char* argv[]) 84 { 85 arguments_t arguments; 86 87 if (parse(&argp, argc, argv, 0, &arguments) != 0) 88 { 89 error("There was an error while parsing arguments"); 90 return 1; 91 } 92 93 std::cout << "Command line options: " << std::endl; 94 95 std::cout << "\t input: " << arguments.input_file << std::endl; 96 std::cout << "\t output: " << arguments.output_file << std::endl; 97 std::cout << "\t hex: " << arguments.hex << std::endl; 98 std::cout << "\t debug: " << arguments.debug << std::endl; 99 std::cout << "\t relocatable: " << arguments.relocatable << std::endl; 100 101 std::cout << "\t args: "; 102 for (const auto& arg : arguments.args) std::cout << arg << " "; 103 std::cout << std::endl; 104 105 return 0; 106 }