From 9eb5c214519f282abe312dccbda70d1de2b362dd Mon Sep 17 00:00:00 2001
From: luca0N! <luca0n@luca0n.com>
Date: Thu, 9 Jun 2022 22:44:44 -0300
Subject: [PATCH] Add help command

Added a help command line option that shows command line syntax and
available options.
---
 src/main.cxx | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/main.cxx b/src/main.cxx
index 3efee17..92dd8f5 100644
--- a/src/main.cxx
+++ b/src/main.cxx
@@ -40,6 +40,12 @@ void printUsage(const char *programName) {
 		<< std::endl;
 }
 
+void print_help(const char *program_name) {
+	printUsage(program_name);
+	std::cout << " -h, --help\t\tShows this help message.\n"
+			  << " -v, --verbose\t\tPrints additional messages to standard output.\n";
+}
+
 void printIntro() {
 	printf("%s v%s (%d)\nCopyright (C) %s %s\n\n",
 			PROGRAM_NAME, PROGRAM_VERSION_NAME, PROGRAM_VERSION,
@@ -60,6 +66,9 @@ int main(int argc, char *argv[]) {
 				if (strcmp(argv[argi], "--verbose") == 0) {
 					verbose = true;
 					std::cout << "Verbose output enabled.\n";
+				} else if (strcmp(argv[argi], "--help") == 0) {
+					print_help(argv[0]);
+					exit(RETURN_SUCCESSFUL);
 				} else {
 					std::cerr << "error: unknown command line option `" <<
 						argv[argi] << "'." << std::endl;
@@ -72,9 +81,13 @@ int main(int argc, char *argv[]) {
 							verbose = true;
 							std::cout << "Verbose output enabled.\n";
 							break;
+						case 'h':
+							print_help(argv[0]);
+							exit(RETURN_SUCCESSFUL);
+							break;
 						default:
-							std::cerr << "error: unknown command line option `" <<
-								argv[argi] << "'." << std::endl;
+							std::cerr << "error: unknown command line option `-" <<
+								argv[argi][i] << "'." << std::endl;
 							exit(RETURN_FAILED_INVALID_SYNTAX);
 							break;
 					}