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-rw-r--r--snake.c83
1 files changed, 42 insertions, 41 deletions
diff --git a/snake.c b/snake.c
index c57530d..33e9487 100644
--- a/snake.c
+++ b/snake.c
@@ -2,9 +2,9 @@
#include <stdlib.h>
#include <time.h>
#include <pthread.h>
-#include <signal.h> //handling ctrl-c
-#include <sys/ioctl.h> //terminal size
-#include <string.h> // argument parsing
+#include <signal.h> /* handling ctrl-c */
+#include <sys/ioctl.h> /* terminal size */
+#include <string.h> /* argument parsing */
#include "vector.h"
#include "snake.h"
@@ -14,7 +14,7 @@
#define UNUSED(x) (void)(x)
/*** GLOBAL VARIABLES ***/
-volatile sig_atomic_t INT_CTRL_C = 0; //flag for ctrl-c interrupt
+volatile sig_atomic_t INT_CTRL_C = 0; /* flag for ctrl-c interrupt */
int SCORE = 0;
int boardSize = 15;
@@ -24,8 +24,9 @@ vectorp_t snakePositions;
vector_t foodPos;
vector_t lastMoveDir;
-void interrupt_handler(int sig); // passed into signal(3) to handle ctrl-c interrupts
-//unsafe functions like printf cannot be called in async interrupt handler
+void interrupt_handler(int sig); /* passed into signal(3) to handle ctrl-c interrupts */
+
+/* unsafe functions like printf cannot be called in async interrupt handler */
void interrupt_handler(int sig) {
UNUSED(sig);
INT_CTRL_C = 1;
@@ -49,19 +50,19 @@ int main(int argc, char **argv) {
}
}
- //get terminal size
+ /* get terminal size */
struct winsize win;
ioctl(fileno(stdout), TIOCGWINSZ, &win);
int width = (int)(win.ws_col);
int height = (int)(win.ws_row);
- //multiplied by 2 to account for the fact that the board is twice as wide as high
+ /* multiplied by 2 to account for the fact that the board is twice as wide as high */
int smallestAxis = width / 2 < height ? width / 2 : height;
boardSize = smallestAxis < boardSize ? smallestAxis : boardSize;
- //hide cursor
+ /* hide cursor */
printf("\033[?25l");
- //make a new thread handling interrupts
+ /* make a new thread handling interrupts */
signal(SIGINT, interrupt_handler);
- //init values
+ /* init values */
snakePositions = init_vectorp(malloc(5 * sizeof(vector_t)), 5);
snakePositions.vectors[0] = init_vector(5, 5);
snakePositions.vectors[1] = init_vector(5, 4);
@@ -71,25 +72,25 @@ int main(int argc, char **argv) {
foodPos = init_vector(7, 9);
lastMoveDir = init_vector(0, 1);
srand(time(NULL));
- //clear the screen so as to prevent artifacting
+ /* clear the screen so as to prevent artifacting */
printf("\033[2J");
- //prepare the pointers which will be used to communicate with the input getting thread
+ /* prepare the pointers which will be used to communicate with the input getting thread */
volatile int* lastInput = calloc(1, sizeof(int));
int* cancellationToken = calloc(1, sizeof(int));
- //and the wrapper struct
+ /* and the wrapper struct */
threadArg_t threadArg;
threadArg.returnV = (void*)lastInput;
threadArg.cancellationToken = cancellationToken;
- //create listener thread
+ /* create listener thread */
pthread_t listenerID;
pthread_create(&listenerID, NULL, get_dir_loop, &threadArg);
- //main game logic loop
+ /* main game logic loop */
while(1) {
- //handle ctrl-c interrupt
+ /* handle ctrl-c interrupt */
if (INT_CTRL_C) {
- //unhide cursor
+ /* unhide cursor */
printf("\033[?25h");
- //kill the listener thread
+ /* kill the listener thread */
*cancellationToken = 1;
printf("Your score was %d. Press any key to exit\n", SCORE);
pthread_join(listenerID, NULL);
@@ -98,23 +99,23 @@ int main(int argc, char **argv) {
return 0;
}
- //first, draw the current state of the board
+ /* first, draw the current state of the board */
draw_board();
- //handle player input
- //wait for the specified interval
+ /* handle player input;
+ * wait for the specified interval */
struct timespec time;
time.tv_sec = 0;
time.tv_nsec = updateInterval;
nanosleep(&time, NULL);
- //read the most recent value emitted by the listener
+ /* read the most recent value emitted by the listener */
vector_t dir = parse_dir(*(char*)lastInput);
- //if the player inputted a valid direction, use it. otherwise, use his last valid input
+ /* if the player inputted a valid direction, use it. otherwise, use his last valid input */
if((dir.mx != 0 || dir.my != 0) && !(dir.mx == 1 && lastMoveDir.mx == -1) && !(dir.mx == -1 && lastMoveDir.mx == 1) && !(dir.my == 1 && lastMoveDir.my == -1) && !(dir.my == -1 && lastMoveDir.my == 1)) {
lastMoveDir = dir;
}
else {
}
- //check if snake landed on the food
+ /* check if snake landed on the food */
int ateFood = 0;
if((snakePositions.vectors[0].mx + lastMoveDir.mx == foodPos.mx) && (snakePositions.vectors[0].my + lastMoveDir.my == foodPos.my)) {
ateFood = 1;
@@ -122,10 +123,10 @@ int main(int argc, char **argv) {
if (updateInterval > 50000000) {
updateInterval -= 20000000;
}
- //move the food
+ /* move the food */
while(1) {
foodPos = init_vector(1 + (rand() % (boardSize - 2)), 1 + (rand() % (boardSize - 2)));
- //if food overlaps snake, try again
+ /* if food overlaps snake, try again */
int overlap = 0;
for(int i = 0; i < snakePositions.length; i++) {
if((snakePositions.vectors[i].mx == foodPos.mx) && (snakePositions.vectors[i].my == foodPos.my)) {
@@ -137,15 +138,15 @@ int main(int argc, char **argv) {
}
}
}
- //move the snake
+ /* move the snake */
vectorp_t newSnakePositions = move_snake(lastMoveDir, ateFood);
free(snakePositions.vectors);
snakePositions = newSnakePositions;
- //check if snake landed on self
+ /* check if snake landed on self */
int died = 0;
for(int i = 1; i < snakePositions.length; i++) {
if(snakePositions.vectors[0].mx == snakePositions.vectors[i].mx && snakePositions.vectors[0].my == snakePositions.vectors[i].my) {
- //game over
+ /* game over */
died = 1;
}
}
@@ -153,7 +154,7 @@ int main(int argc, char **argv) {
break;
}
}
- //clear the last getch call from the listener
+ /* clear the last getch call from the listener */
*cancellationToken = 1;
printf("\n%sYou died. Score: %d. Press any key to exit%s\n", RED, SCORE, COLOR_RESET);
printf("\033[?25h");
@@ -168,7 +169,7 @@ void* get_dir_loop(void* threadArg) {
}
return NULL;
}
-//parses WASD or HJKL, returns the necessary deltas to move within a 2d array
+/* parses WASD or HJKL, returns the necessary deltas to move within a 2d array */
vector_t parse_dir(char cDir) {
if(cDir == 'w' || cDir == 'k') {
return init_vector(0, -1);
@@ -189,7 +190,7 @@ vector_t parse_dir(char cDir) {
vectorp_t move_snake(vector_t dir, int lengthen) {
int newLength = snakePositions.length + (lengthen ? 1 : 0);
vector_t* newSnakePositions = malloc((newLength * sizeof(vector_t)));
- //wrap around edges
+ /* wrap around edges */
int nhx = snakePositions.vectors[0].mx + dir.mx;
nhx = nhx < 0 ? boardSize - 1 : nhx >= boardSize ? 0 : nhx;
int nhy = snakePositions.vectors[0].my + dir.my;
@@ -201,12 +202,12 @@ vectorp_t move_snake(vector_t dir, int lengthen) {
return init_vectorp(newSnakePositions, newLength);
}
void draw_board() {
- //move the cursor to the top left corner of the screen
+ /* move the cursor to the top left corner of the screen */
printf("\033[0;0H");
- //iterate through and write the board
+ /* iterate through and write the board */
for(int r = 0; r < boardSize; r++) {
for(int c = 0; c < boardSize; c++) {
- //determine the contents of the board position
+ /* determine the contents of the board position */
int type = 0;
for(int i = 0; i < snakePositions.length; i++) {
if(snakePositions.vectors[i].mx == c && snakePositions.vectors[i].my == r) {
@@ -220,21 +221,21 @@ void draw_board() {
if(foodPos.mx == c && foodPos.my == r) {
type = 3;
}
- //append the appropriate value
+ /* append the appropriate value */
if(type == 0) {
- //empty square
+ /* empty square */
printf("` ");
}
else if(type == 1) {
- //snake head
+ /* snake head */
printf("%s@ %s", GRN, COLOR_RESET);
}
else if(type == 2) {
- //snake body
+ /* snake body */
printf("%s* %s", GRN, COLOR_RESET);
}
else if(type == 3) {
- //food
+ /* food */
printf("%sF %s", MAG, COLOR_RESET);
}
}
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-22 03:03:58 +0000