Started working on better error handling, by throwing exceptions and displaying error messages in the GUI

check_input.cpp

@@ -1,38 +1,32 @@
 #include <iostream>
-#include "includes/easysock.hpp"
+#include "includes/easysock.h"
 #include "includes/connect_code.hpp"
 #include "includes/server.hpp"
 #include "includes/client.hpp"
 #include "includes/check_input.hpp"
 #include "includes/raygui/raygui.h"
 #include "includes/exception_consts.hpp"
+#include "includes/raygui_helpers.hpp"
 #include "includes/timer.h"
 
-/* Display the given text, centered on the screen, as a label */
-void display_text_centered(std::string to_disp) {
-	const char* to_disp_cstr = to_disp.c_str();
-	Vector2 label_size = MeasureTextEx(GetFontDefault(), to_disp_cstr, GuiGetStyle(DEFAULT, TEXT_SIZE)+1, GuiGetStyle(DEFAULT, TEXT_SPACING)+1); // The '+1' is there to account for any rounding errors
-	
-	BeginDrawing();
-		ClearBackground(BLACK);
-		GuiLabel(Rectangle{(GetScreenWidth()/2) - (label_size.x/2), (GetScreenHeight()/2) - (label_size.y/2), label_size.x, label_size.y}, to_disp_cstr);
-	EndDrawing();	
-	return;
-}
-
 GameType check_server(char* ip_text, char* port_text) {
 	GameType type;
 	std::string addr;
 	uint16_t port;
 
+	/* Check if IP address and port are in valid forms */
+	if (check_ip_ver(ip_text) < 0) {
+		throw std::invalid_argument("Invalid IP address");
+	}
+	if (port_to_num(port_text) < 0) {
+		throw std::invalid_argument("Invalid port");
+	}
+
+	/* From here on, we assume that the IP and port are valid */
+
 	addr = std::string(ip_text);
 	port = std::stoi(std::string(port_text));
 
-	/* Check if IP is valid */
-	if (check_ip_ver(addr.data()) < 0) {
-		throw EXCEPT_INVALIDIP;
-	}
-
 	std::string code = connect_code::encode(addr, std::to_string(port));
 
 	/* Create server socket and wait for client to connect */

client.cpp

@@ -2,7 +2,7 @@
 #include "includes/client.hpp"
 #include "includes/exception_consts.hpp"
 #include "includes/sock.hpp"
-#include "includes/easysock.hpp"
+#include "includes/easysock.h"
 
 /* Destructor - closes any open sockets */
 Client::~Client() {

easysock.c

@@ -1,8 +1,9 @@
-#include "includes/easysock.hpp"
+#include "includes/easysock.h"
-#include <cstring>
+#include <string.h>
-#include <cstdlib>
+#include <stdlib.h>
-#include <cstdio>
+#include <stdio.h>
-#include <cerrno>
+#include <errno.h>
+#include <ctype.h>
 #include <fcntl.h>
 
 #ifndef _WIN32
@@ -187,6 +188,29 @@ int check_ip_ver(const char* address) {
 	}
 }
 
+int port_to_num(const char* port_str) {
+	/* The largest possible port value is 65535: a 5 character string */
+	if (strlen(port_str) > 5) {
+		return -1;
+	}
+	
+	for (int i = 0; i < strlen(port_str); i++) {
+		if (isdigit(port_str[i]) == 0) { // Ensure that every character in port_str is a digit (isidigit() returns 0 if the parameter is not a digit)
+			return -1;
+		}
+	}
+	/* Convert the string to a base-10 integer */
+	int port_num = (int)strtol(port_str, NULL, 10);
+	if (port_num > 65535) {
+		return -1;
+	}
+	if (port_num < 1024) {
+		return -2;	
+	}
+	
+	return port_num;
+}
+
 int int_to_inet(int network) {
 	if (network == 4) {
 		return AF_INET;

includes/easysock.h

@@ -1,5 +1,8 @@
-#ifndef EASYSOCK_HPP_
+#ifdef __cplusplus
-#define EASYSOCK_HPP_
+extern "C" {
+#endif
+#ifndef EASYSOCK_H_
+#define EASYSOCK_H_
 
 #ifdef _WIN32
 	#include <winsock2.h>
@@ -70,6 +73,12 @@ IPv6 address (returns 6) or neither (returns -1). */
 
 int check_ip_ver(const char* address);
 
+/* port_to_num - Converts a string representing a port, into a numeric value.
+Returns -1 if the string is not numeric, or exceeds the maximum port length.
+Returns -2 if the string is lower than 1024, This serves as a warning, as ports less
+than 1023 are reserved. */
+int port_to_num(const char* port_str);
+
 /* int_to_inet - Takes an int value (4 for IPv4, 6 for IPv6) and returns AF_INET or
 AF_INET6 respectively. */
 
@@ -92,3 +101,6 @@ int sock_quit(void);
 int sock_close(SOCKET);
 
 #endif
+#ifdef __cplusplus
+}
+#endif

includes/raygui_helpers.hpp

@@ -0,0 +1,9 @@
+#ifndef _RAYGUI_HELPERS_HPP
+#define _RAYGUI_HELPERS_HPP
+#include <string>
+
+/* Display the given text, centered on the screen, as a label.
+NEEDS RAYGUI LIBRARY. */
+void display_text_centered(std::string to_disp);
+
+#endif

main.cpp

@@ -26,11 +26,12 @@
 #include "includes/paddle.hpp"
 #include "includes/ball.hpp"
 #include "includes/connect_code.hpp"
-#include "includes/easysock.hpp"
 #include "includes/client.hpp"
 #include "includes/server.hpp"
 #include "includes/exception_consts.hpp"
 #include "includes/check_input.hpp"
+#include "includes/raygui_helpers.hpp"
+#include "includes/easysock.h"
 #include "includes/serialization.h"
 #include "includes/timer.h"
 
@@ -272,7 +273,7 @@ int main(int argc, char** argv) {
 		/* Server mode, ask user to input IP address and port */
 		if (selected_item == M_SERVER) {
 			button_pressed = false; // Whether submit button is pressed
-			char* ip_text = (char *)calloc(100, sizeof(char)); // Holds input of IP text box
+			char* ip_text = (char *)calloc(150, sizeof(char)); // Holds input of IP text box
 			char* port_text = (char *)calloc(20, sizeof(char)); // Holds input of port text box
 			const char* ip_label = "Local IP address";
 			const char* port_label = "Port number (1024 - 65535)";
@@ -303,14 +304,22 @@ int main(int argc, char** argv) {
 				EndDrawing();
 			}
 			
+			try {
 				type = check_server(ip_text, port_text);
+			} catch (std::invalid_argument& inv) {
+				display_text_centered(std::string(inv.what()) + "\nClosing game...");
+				Timer timer = timer_init(2); // Wait for two seconds
+				while (!timer_done(timer));
+				CloseWindow(); // Close and exit
+				return -1;
+			}
 			free(ip_text);
 			free(port_text);
 		}
 		
 		if (selected_item == M_CLIENT) {
 			button_pressed = false; // Whether submit button is pressed
-			char* code_text = (char *)calloc(100, sizeof(char)); // Holds the connect code
+			char* code_text = (char *)calloc(150, sizeof(char)); // Holds the connect code
 			const char* code_label = "Enter code:";
 			bool editing_code = false; // Indicates whether the port text box is being edited
 			while (button_pressed == false || ((strlen(code_text) == 0))) {

meson.build

@@ -33,7 +33,7 @@ if build_machine.system() == 'windows'
 endif
 
 executable('pong', 
-	'main.cpp', 'easysock.cpp', 'sock.cpp','paddle.cpp', 'ball.cpp', 'numeric_base.cpp', 'connect_code.cpp', 'server.cpp', 'client.cpp', 'check_input.cpp',
+	'main.cpp', 'sock.cpp','paddle.cpp', 'ball.cpp', 'numeric_base.cpp', 'connect_code.cpp', 'server.cpp', 'client.cpp', 'check_input.cpp', 'raygui_helpers.cpp',
-	'serialization.c', 'timer.c', 
+	'serialization.c', 'timer.c', 'easysock.c',
 	dependencies: [raylib, ws2_dep, winmm]
 )

raygui_helpers.cpp

@@ -0,0 +1,13 @@
+#include "includes/raygui_helpers.hpp"
+#include "includes/raygui/raygui.h"
+
+void display_text_centered(std::string to_disp) {
+	const char* to_disp_cstr = to_disp.c_str();
+	Vector2 label_size = MeasureTextEx(GetFontDefault(), to_disp_cstr, GuiGetStyle(DEFAULT, TEXT_SIZE)+1, GuiGetStyle(DEFAULT, TEXT_SPACING)+1); // The '+1' is there to account for any rounding errors
+	
+	BeginDrawing();
+		ClearBackground(BLACK);
+		GuiLabel(Rectangle{(GetScreenWidth()/2) - (label_size.x/2), (GetScreenHeight()/2) - (label_size.y/2), label_size.x, label_size.y}, to_disp_cstr);
+	EndDrawing();	
+	return;
+}

server.cpp

@@ -8,8 +8,8 @@
 #include "includes/sock.hpp"
 #include "includes/server.hpp"
 #include "includes/exception_consts.hpp"
-#include "includes/easysock.hpp"
 #include "includes/connect_code.hpp"
+#include "includes/easysock.h"
 
 /* Destructor - closes any open sockets */
 Server::~Server() {

sock.cpp

@@ -2,7 +2,7 @@
 #include <stdexcept>
 #include "includes/sock.hpp"
 #include "includes/exception_consts.hpp"
-#include "includes/easysock.hpp"
+#include "includes/easysock.h"
 
 /* Function to create socket. This function doesn't actually create a socket
 (and isn't meant to be called directly). Instead, the client and server classes