74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
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#include <iostream>
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#include <cstdlib>
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#include <cstring>
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#include <string>
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#include <stdexcept>
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#include <fstream>
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#include <getopt.h>
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#include "version.hpp"
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void print_help() {
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std::cout << "usage: {PROJECT} [-h]\n";
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std::cout << " -h, --help show this help text and exit\n";
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std::cout << " --version show version number and exit\n";
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}
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std::string filter(const std::string& text) {
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std::string result;
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// your filter code here
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result = text; // null-filter
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return result;
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}
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int main(int argc, char * argv[]) {
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try {
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int opt_char, opt_val;
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struct option long_options[] = {
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{"help", no_argument, nullptr, 'h'},
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{"version", no_argument, &opt_val, 1},
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{nullptr, 0, nullptr, 0}
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};
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while ((opt_char = getopt_long(argc, argv, "h", long_options, nullptr)) != -1) {
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switch (opt_char) {
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case 0: {
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// handle long-only options here
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switch (opt_val) {
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case 1:
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std::cout << {PROJECT}_version() << std::endl;
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return EXIT_SUCCESS;
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}
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break;
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}
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case 'h':
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print_help();
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return EXIT_SUCCESS;
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case '?':
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throw std::runtime_error("unrecognized option");
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}
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}
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if (optind == argc) {
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// no file args => read lines from stdin
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std::string line;
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while (getline(std::cin, line)) {
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std::cout << filter(line) << '\n';
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}
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}
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for (int i = optind; i < argc; ++i) {
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try {
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// process file argv[i]
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std::ifstream file {argv[i]};
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std::string line;
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while (getline(file, line)) {
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std::cout << filter(line) << '\n';
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}
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} catch (const std::runtime_error& ex) {
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std::cerr << "{PROJECT}: " << ex.what() << '\n';
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}
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}
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} catch (const std::exception& ex) {
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std::cerr << "{PROJECT}: " << ex.what() << '\n';
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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