Rockingcool/netpong
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases 2 Wiki Activity

Wrote the check_num_args() function; still need to integrate it into the program. Also wrote a help text that is printed with -h flag.

Browse Source
This commit is contained in:
Aadhavan Srinivasan
2024-03-17 00:30:08 -04:00
parent 77a147e08f
commit c2bedb0601
1 changed files with 47 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
main.cpp
View File

@@ -49,6 +49,24 @@ const float BASE_BOUNCE_RAD = (BASE_BOUNCE_DEG / 180.0) * M_PI;
const float BASE_SPEED_COMPONENTS = 15;
const float BASE_SPEED = sqrt(powf(BASE_SPEED_COMPONENTS, 2) * 2);
std::string HELP_TEXT = "\nnetpong - A networked pong game for the internet era.\n"
"\n"
"Usage: \n"
"netpong [MODE] [ADDRESS|CODE]\n"
"\n"
"MODE: \n"
"-S : Server mode. Starts a server to allow the other player to connect.\n"
"IP address must be specified. Port is optional, 6500 is used as default.\n"
"\n"
"-C: Client mode. Connects to a server, using the provided connection code.\n"
"\n"
"If no mode is specified, single player mode is used as default.\n"
"\n"
"CONTROLS:"
"\'W\' and \'S\' control left paddle (AKA client paddle)\n"
"Up and Down arrow keys control right paddle (AKA server paddle)\n";
/* Simple function to return 1 if a value is positive, and -1 if it is negative */
int signum(int num) {
int retval = 0;
@@ -77,11 +95,23 @@ raylib::Vector2 changeVelocityAfterCollision(Paddle paddle, Ball ball) {
}
/* Checks the number and type of the command-line arguments. Throws an exception
if the args are invalid. */
if the args are invalid. DOES NOT PROCESS VALID ARGUMENTS. */
void check_num_args(int argc, char** argv) {
if (argc > 3) {
throw std::invalid_argument("ARGUMENT ERROR: Too many arguments. To view syntax, use -h or --help.");
}
if (argc > 1) { // Either server or client mode
if (std::string(argv[1]) == "-S" && argc < 3) { // Server mode but no address
throw std::invalid_argument("ARGUMENT ERROR: Server mode specified without any address.");
}
if (std::string(argv[1]) == "-C" && argc < 3) { // Client mode but no code
throw std::invalid_argument("ARGUMENT ERRROR: Client mode specified without any code.");
}
if (std::string(argv[1]) == "-h" || std::string(argv[1]) == "--help") {
throw new std::invalid_argument(HELP_TEXT); // I am abusing the exception mechanism here, so that I can ensure that the caller quits the program.
}
}
return;
}
/* This function checks the command-line arguments passed to the program.
@@ -188,6 +218,19 @@ GameType check_server_client(int argc, char** argv) {
}
int main(int argc, char** argv) {
/* Check the number of command-line arguments */
try {
check_num_args(argc, argv);
} catch (std::invalid_argument& inv) {
std::cout << inv.what() << std::endl;
return -1;
}
/* From here on, we assume that:
a. The program was started in single player mode, OR
b. The program was started in server mode, and an address was given, OR
c. The program was started in client mode, and a code was given. */
/* Check if game was started in server or client mode, and set appropriate variables */
/* GameType struct, to define whether the game is in single or multi-player mode, and