added option to take data from parameter instead of stdin

main.cpp

@@ -2,6 +2,7 @@
 #include <getopt.h>
 #include <iostream>
 #include <sstream>
+
 #include "QR.hpp"
 
 #define UNUSED(var) (void) var;
@@ -17,6 +18,7 @@ Released under MIT license.
 Usage:
     -f --format    output file format. can be one of "cli, png, svg"
     -h --help      show this help
+	-i --input     take data from this argument instead of stdin
     -o --output    output file name
     -s --size      desired output file size in pixels
     -t --type      output QR code type. can be one of "small, medium, large"
@@ -32,6 +34,7 @@ int main(int argc, char* argv[]) {
 	}
 	const option options[] = {
 		{"help", no_argument, nullptr, 'h'},
+		{"input", required_argument, nullptr, 'i'},
 		{"output", required_argument, nullptr, 'o'},
 		{"size", required_argument, nullptr, 's'},
 		{"type", required_argument, nullptr, 't'},
@@ -43,10 +46,12 @@ int main(int argc, char* argv[]) {
 	size_t segmentSize            = 0;
 	massivedynamic::Type type     = massivedynamic::Type::MEDIUM;
 	massivedynamic::Format format = massivedynamic::Format::CONSOLE;
+	bool fromStdin                = true;
+	std::string paramData         = "";
 
 	for(;;) {
 		int index  = -1;
-		int result = getopt_long(argc, argv, "ho:s:t:f:", options, &index);
+		int result = getopt_long(argc, argv, "ho:s:t:f:i:", options, &index);
 		
 		if (result == -1)
 			break;
@@ -90,6 +95,11 @@ int main(int argc, char* argv[]) {
 				}
 				break;
 			}
+			case 'i': {
+				fromStdin = false;
+				paramData = optarg;
+				break;
+			}
 			case 'h':
 			default:
 				printHelp();
@@ -100,23 +110,31 @@ int main(int argc, char* argv[]) {
  	std::string line;
 	std::stringstream data;
  
-	if (!isatty(fileno(stdin))) {
+	if (fromStdin) {
-		while (std::getline(std::cin, line)) {
+		if (!isatty(fileno(stdin))) {
-			if (std::cin.eof() || line.empty()) {
+			while (std::getline(std::cin, line)) {
-				std::cin.clear();
+				if (std::cin.eof() || line.empty()) {
-				break;
+					std::cin.clear();
+					break;
+				}
+				data << line;
 			}
-			data << line;
 		}
-	}
 
-	if (isatty(fileno(stdin)) || data.str().empty()) {
+		if (isatty(fileno(stdin)) || data.str().empty()) {
-		std::cerr << "ERROR: no data from stdinput." << std::endl;
+			std::cerr << "ERROR: no data from stdinput." << std::endl;
+			exit(1);
+		}
+	} else
+		data << paramData;
+
+	if (data.str().empty()) {
+		std::cerr << "ERROR: input data is empty" << std::endl;
 		exit(1);
 	}
 
 	if ((format == massivedynamic::Format::PNG || format == massivedynamic::Format::SVG) && outputFile.empty()) {
-		std::cerr << "output file name (-o, --output) can not be empty" << std::endl;
+		std::cerr << "ERROR: output file name (-o, --output) can not be empty" << std::endl;
 		return 1;
 	}