first commit

src/main.cpp

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+//
+// main.cpp
+// pw
+//
+// Created by Bob Polis at 2021-11-05
+// Copyright (c) 2021 SwiftCoder. All rights reserved.
+//
+
+#include <iostream>
+#include <cstdlib>
+#include <string>
+#include <stdexcept>
+#include <getopt.h>
+#include <libscnumerics.hpp>
+
+void print_help() {
+    std::cout << "usage: pw [-h|--version]\n";
+    std::cout << "  -h, --help    show this help text and exit\n";
+    std::cout << "  --version     show version number and exit\n";
+}
+
+void print_version() {
+    std::cout << "pw version 1.0\n";
+}
+
+int main(int argc, char* argv[]) {
+    try {
+        std::string upper {"ABCDEFGHIJKLMNOPQRSTUVWXYZ"};
+        std::string lower {"abcdefghijklmnopqrstuvwxyz"};
+        std::string digits {"0123456789"};
+        std::string symbols {"_-=+<>,.!@#$%^&*"};
+        std::string valid;
+        int len {12};
+        bool noflags {true};
+        int opt_char, opt_val;
+        struct option long_options[] = {
+            {"help", no_argument, nullptr, 'h'},
+            {"version", no_argument, &opt_val, 1},
+            {"upper", no_argument, nullptr, 'u'},
+            {"lower", no_argument, nullptr, 'l'},
+            {"digit", no_argument, nullptr, 'd'},
+            {"symbol", no_argument, nullptr, 's'},
+            {"count", required_argument, nullptr, 'c'},
+            {nullptr, 0, nullptr, 0}
+        };
+        while ((opt_char = getopt_long(argc, argv, "c:hulds", long_options, nullptr)) != -1) {
+            std::string arg {optarg ? optarg : ""};
+            switch (opt_char) {
+                case 0: {
+                    // handle long-only options here
+                    switch (opt_val) {
+                        case 1:
+                            print_version();
+                            return EXIT_SUCCESS;
+                    }
+                    break;
+                }
+                case 'h':
+                    print_help();
+                    return EXIT_SUCCESS;
+                case 'u':
+                    noflags = false;
+                    valid += upper;
+                    break;
+                case 'l':
+                    noflags = false;
+                    valid += lower;
+                    break;
+                case 'd':
+                    noflags = false;
+                    valid += digits;
+                    break;
+                case 's':
+                    noflags = false;
+                    valid += symbols;
+                    break;
+                case 'c':
+                    len = std::stoi(optarg);
+                    break;
+                case '?':
+                    throw std::runtime_error("unrecognized option");
+            }
+        }
+        if (optind == argc) {
+            // here when no file args
+            if (noflags) {
+                valid = upper + lower + digits + symbols;
+            }
+            for (int i = 0; i < len; ++i) {
+                std::cout << sc::random::choice<char>(valid.begin(), valid.end());
+            }
+            std::cout << std::endl;
+        }
+        for (int i = optind; i < argc; ++i) {
+            try {
+                // process file argv[i]
+            } catch (const std::runtime_error& ex) {
+                std::cerr << "pw: " << ex.what() << '\n';
+            }
+        }
+    } catch (const std::exception& ex) {
+        std::cerr << "pw: " << ex.what() << '\n';
+        return EXIT_FAILURE;
+    }
+    return EXIT_SUCCESS;
+}