zz

Makefile

@@ -9,6 +9,6 @@ clean:
 	rm *.o
 	rm game
 
-game: main.o game.o world.o snake.o
-	gcc -rdynamic -g main.o game.o world.o snake.o -lcurses -lm -o game
+game: main.o world.o snake.o
+	gcc -rdynamic -g main.o world.o snake.o -lcurses -lm -o game
 

game.c

@@ -4,16 +4,17 @@
 #include "world.h"
 #include "game.h"
 #include "snake.h"
-
+// This file contains functions for drawing the the game and changing the state
 
 // Start is called one in the beginning
-void* init_game(struct world* world){
-
+void* init_game(){
     // Allocate memory for the state
     struct state* st = calloc(1,(sizeof(struct state)));
-    st->snake = NULL;
-    st->sx = 1;
-    st->sy = 0;
+    return st;
+
+}
+
+void init_snake(struct event* world, struct state* st){
     int cy = world->height/2;
     int cx = world->width/2 - 5;
     for (int i = 0; i < 5; i++){
@@ -26,15 +27,17 @@ void* init_game(struct world* world){
         st->foodx[i] = rand() % w;
         st->foody[i] = rand() % h;
     }
-    return st;
-
 }
 
 // Step is called in a loop once in interval.
 // It should modify the state and draw it.
-int world_event(struct world* w,void* game){
+int world_event(struct event* w,void* game){
     // Get state pointer
     struct state* st = game;
+    if (w->type == EVENT_START){
+        init_snake(w,st);
+    }
+    else if (w->type == EVENT_KEY){
         int key = w->key;
 
         if (key == KEY_RIGHT){
@@ -53,28 +56,31 @@ int world_event(struct world* w,void* game){
             st->sx = 0;
             st->sy = -1;
         }
-    else if (key == KEY_ENTER){
+    }
+    else if (w->type == EVENT_ESC){
             // Non zero means finish the loop and stop the game.
             return 1;
     }
+    else if (w->type == EVENT_TIMEOUT){
         st->width = w->width;
         st->height = w->height;
         int r = step_state(st);
         // Draw snake
         struct snake* sn = st->snake;
         while (sn != NULL){
-        set_cell(w,'x',sn->x,sn->y);
+            set_cell('x',sn->x,sn->y);
             sn = sn->next;
         }
         for (int i = 0 ; i < FOOD_COUNT; i++){
             if (st->foodx[i] >= 0 && st->foody[i] >= 0){
-            set_cell(w,'*',st->foodx[i],st->foody[i]);
+                set_cell('*',st->foodx[i],st->foody[i]);
             }
         }
         if (r){
             char message[] = "Koniec";
             for (int i = 0; i < 6; i++){
-            set_cell(w,message[i],10+i,10);
+                set_cell(message[i],10+i,10);
+            }
         }
     }
     return 0;

game.h

@@ -2,25 +2,10 @@
 #define _GAME_H_INCLUDE_
 #include "world.h"
 
-// Set of variables that expresses state of the game.
-// 
-struct game {
-    // X position of the cat
-    int catx;
-    // Y opsition of the cat
-    int caty;
-    // X position of the mouse
-    int mousex;
-    // Y position of the mouse
-    int mousey;
-    // Funky message
-    char message[100];
-};
-
-// Returns pointer to  newly allocated world
-void* init_game(struct world* g);
+// Returns pointer to  newly allocated state
+void* init_game();
 
 // Changes world according to the game state (pressed key, screen size or other event)
-int world_event(struct world* world,void* game);
+int world_event(struct event* event,void* state);
 
 #endif

main.c

@@ -1,9 +1,93 @@
-#include "game.h"
 #include "world.h"
 #include <stdlib.h>
+#include <curses.h>
+#include <stdlib.h>
+#include <string.h>
+#include "snake.h"
+// This file contains functions for drawing the the game and changing the state
+
+// Start is called one in the beginning
+void* init_game(){
+    // Allocate memory for the state
+    struct state* st = calloc(1,(sizeof(struct state)));
+    return st;
+
+}
+
+void init_snake(struct event* world, struct state* st){
+    int cy = world->height/2;
+    int cx = world->width/2 - 5;
+    for (int i = 0; i < 5; i++){
+        st->snake = add_snake(st->snake,cx + i ,cy);
+    }
+
+    int h = world->height;
+    int w = world->width;
+    for (int i = 0; i < 5; i++){
+        st->foodx[i] = rand() % w;
+        st->foody[i] = rand() % h;
+    }
+}
+
+// Step is called in a loop once in interval.
+// It should modify the state and draw it.
+int world_event(struct event* w,void* game){
+    // Get state pointer
+    struct state* st = game;
+    if (w->type == EVENT_START){
+        init_snake(w,st);
+    }
+    else if (w->type == EVENT_KEY){
+        int key = w->key;
+
+        if (key == KEY_RIGHT){
+           st->sx = 1;
+           st->sy = 0;
+        }
+        else if (key == KEY_LEFT){
+            st->sx = -1;
+            st->sy = 0;
+        }
+        else if (key == KEY_DOWN){
+            st->sx = 0;
+            st->sy = 1;
+        }
+        else if (key == KEY_UP){
+            st->sx = 0;
+            st->sy = -1;
+        }
+    }
+    else if (w->type == EVENT_ESC){
+            // Non zero means finish the loop and stop the game.
+            return 1;
+    }
+    else if (w->type == EVENT_TIMEOUT){
+        st->width = w->width;
+        st->height = w->height;
+        int r = step_state(st);
+        // Draw snake
+        struct snake* sn = st->snake;
+        while (sn != NULL){
+            set_cell('x',sn->x,sn->y);
+            sn = sn->next;
+        }
+        for (int i = 0 ; i < FOOD_COUNT; i++){
+            if (st->foodx[i] >= 0 && st->foody[i] >= 0){
+                set_cell('*',st->foodx[i],st->foody[i]);
+            }
+        }
+        if (r){
+            char message[] = "Koniec";
+            for (int i = 0; i < 6; i++){
+                set_cell(message[i],10+i,10);
+            }
+        }
+    }
+    return 0;
+}
 
 
 int main(int argc, char** argv){
-    start_world(world_event,init_game,free);
+    start_world(init_game,world_event,free);
     return 0;
 }

world.c

@@ -5,67 +5,80 @@
 #include <string.h>
 #include <time.h>
 
-#include <unistd.h>
-#include <execinfo.h>
-
-void print_backtrace() {
-    //https://linux.die.net/man/3/backtrace_symbols
-    int j, nptrs;
-    void *buffer[100];
-    char **strings;
-    nptrs = backtrace(buffer, 100);
-    printf("backtrace() returned %d addresses\n", nptrs);
-
-   /* The call backtrace_symbols_fd(buffer, nptrs, STDOUT_FILENO)
-       would produce similar output to the following: */
-
-    strings = backtrace_symbols(buffer, nptrs);
-    if (strings == NULL) {
-        perror("backtrace_symbols");
-        exit(EXIT_FAILURE);
-    }
-   for (j = 0; j < nptrs; j++)
-        printf("%s\n", strings[j]);
-   free(strings);
-}
+int TIMEOUT;
 
 void abort_game(const char* message){
     endwin();
-    print_backtrace();
     puts(message);
     exit(1);
 }
 
+void check_bounds(const char* source,int x, int y){
+    char msg[200];
+    if (x < 0 || x >= COLS){
+        sprintf(msg,"%s:: width %d is out of bounds (0,%d)",source,x,COLS);
+        abort_game(msg);
+    }
+    if (y < 0 || y >= LINES){
+        sprintf(msg,"%s:: height %d is out of bounds (0,%d)",source,y,LINES);
+        abort_game(msg);
+    }
+}
+
+void clear_screen(){
+    // Clear screen
+    mvaddch(0,0,' ');
+    int screenchars = LINES*COLS;
+    for (int j = 1; j < screenchars;j++ ){
+        addch(' ');
+    }
+}
+
+void game_speed(int value){
+    if (value < 0){
+        abort_game("world_seed:: cannot be negative\n");
+    }
+    TIMEOUT =value;
+}
+
+void set_message(const char* message,int x,int y) {
+    int l = strlen(message);
+    for (int i = 0; i < l; i++){
+        check_bounds("set_message",x+i,y);
+        set_cell(message[i],x+i,y);
+    }
+}
+
 void assert_message(int event,const char* message){
     if (event == 0){
         abort_game(message);
     }
 }
 
-void stamp_cell(struct world* w,int character,enum color_stamp pen, int x,int y) {
-    assert_message(w != NULL,"stamp_cell:: world is NULL"); 
-    if (x < 0 || x >= w->width){
-        char msg[100];
-        sprintf(msg,"stamp_cell:: width %d is out of bounds (0,%d)",x,w->width);
-        abort_game(msg);
+
+void set_cell(int character,int x,int y) {
+    check_bounds("set_cell",x,y);
+    set_color_cell(character,x,y,COLOR_WHITE,COLOR_BLACK);
 }
-    if (y < 0 || y >= w->height){
-        char msg[100];
-        sprintf(msg,"stamp_cell:: height %d is out of bounds (0,%d)",y,w->height);
-        abort_game(msg);
-    }
-    attron(pen);
+
+void set_color_cell(int character,int x,int y,short front_color,short back_color){
+    check_bounds("set_color_cell",x,y);
+    if (has_colors()){
+        int pair = COLOR_COUNT * front_color + back_color; 
+        attron(COLOR_PAIR(pair));
         mvaddch(y,x,character);
-    attroff(pen);
+        attroff(COLOR_PAIR(pair));
+    }
+    else{
+        mvaddch(y,x,character);
+    }
 }
 
-void set_cell(struct world* w,int character,int x,int y) {
-    stamp_cell(w,character,0,x,y);
-}
-
-int start_world(int (*world_event)(struct world* world,void* game),void* (*init_game)(struct world*),void (*destroy_game)(void*)){
+int start_world(void* (*init_game)(),int (*world_event)(struct event* event,void* game),void (*destroy_game)(void*)){
     srand(time(NULL));
     int r = 1;
+    // Speed global variable
+    TIMEOUT = 100;
     if (initscr() == NULL){
         // TODO Which Error?
         puts("Curses Error.");
@@ -76,60 +89,107 @@ int start_world(int (*world_event)(struct world* world,void* game),void* (*init_
     nodelay(stdscr,TRUE); // Nečakaj na stlačenie
     keypad(stdscr,TRUE); // Aktivuje šípky
     curs_set(FALSE); // Neviditeľný kurzor
+    /* Get all the mouse events */
+    mousemask(ALL_MOUSE_EVENTS, NULL);
+    MEVENT mouse_event;
     if (has_colors()){ // Zistenie či terminál podporuje farby
         start_color();
-        // Pera na ciernom podklade
-        init_pair(BLACK_FRONT,  COLOR_BLACK, COLOR_BLACK);
-        init_pair(WHITE_FRONT,  COLOR_WHITE, COLOR_BLACK);
-        init_pair(RED_FRONT,    COLOR_RED, COLOR_BLACK);
-        init_pair(GREEN_FRONT,  COLOR_GREEN, COLOR_BLACK);
-        init_pair(BLUE_FRONT,   COLOR_BLUE, COLOR_BLACK);
-        init_pair(CYAN_FRONT,   COLOR_CYAN, COLOR_BLACK);
-        init_pair(MAGENTA_FRONT,COLOR_MAGENTA, COLOR_BLACK);
-        init_pair(YELLOW_FRONT, COLOR_YELLOW, COLOR_BLACK);
-        init_pair(BLACK_BACK,   COLOR_BLACK, COLOR_BLACK);
-        init_pair(WHITE_BACK,   COLOR_BLACK, COLOR_WHITE);
-        init_pair(RED_BACK,     COLOR_BLACK, COLOR_RED);
-        init_pair(GREEN_BACK,   COLOR_BLACK, COLOR_GREEN);
-        init_pair(BLUE_BACK,    COLOR_BLACK, COLOR_BLUE);
-        init_pair(CYAN_BACK,    COLOR_BLACK, COLOR_CYAN);
-        init_pair(MAGENTA_BACK, COLOR_BLACK, COLOR_MAGENTA);
-        init_pair(YELLOW_BACK,  COLOR_BLACK, COLOR_YELLOW);
+        for (int i = 0; i < COLOR_COUNT;i++){
+            for (int j = 0; j < COLOR_COUNT;j++){
+                init_pair(i * COLOR_COUNT + j, i,j);
+            }
+        }
     }
     else {
         puts("No colors!\n");
     }
-    struct world world;
-    world.height = LINES;
-    world.width = COLS;
-    world.interval = 100;
-    world.key = ERR;
-
     void* game = NULL;
     if (init_game != NULL){
-         game = init_game(&world);
-         assert_message(game != NULL,"init_game should return non null pointer");
+         game = init_game();
+         assert_message(game != NULL,"init_game:: should return non null pointer");
     }
-    timeout(world.interval);
+    timeout(TIMEOUT);
     // Initial step
-    r = world_event(&world,game);
+    struct event event;
+    memset(&event,0,sizeof(struct event));
+    event.height = LINES;
+    event.width = COLS;
+    event.type = EVENT_START;
+    clock_t start_time = clock();
+    clock_t last_timeout = start_time;
+    clock_t next_timeout = last_timeout + TIMEOUT;
+    event.time_ms = start_time;
+    // Start event
+    r = world_event(&event,game);
     refresh();
     while (!r) {
-        world.height = LINES;
-        world.width = COLS;
-        world.key = getch();
-        // Clear screen
-        mvaddch(0,0,' ');
-        int screenchars = LINES*COLS;
-        for (int j = 1; j < screenchars;j++ ){
-            addch(' ');
+        memset(&event,0,sizeof(struct event));
+        event.height = LINES;
+        event.width = COLS;
+        event.key = getch();
+        // No key was pressed
+        if (event.key == ERR){
+            event.type = EVENT_TIMEOUT;
+            last_timeout = clock();
+            next_timeout = last_timeout + TIMEOUT;
+        }
+        // Mouse event
+        else if (event.key == KEY_MOUSE ){
+            event.type = EVENT_MOUSE;
+            if(getmouse(&mouse_event) == OK){
+                event.mouse_x = mouse_event.x;
+                event.mouse_y = mouse_event.y;
+                if(mouse_event.bstate & BUTTON1_PRESSED){
+                    event.mouse_left = 1;
+                }
+                if(mouse_event.bstate & BUTTON2_PRESSED){
+                    event.mouse_middle = 1;
+                }
+                if(mouse_event.bstate & BUTTON3_PRESSED){
+                    event.mouse_right = 1;
+                }
+            }
+        }
+        else if (event.key == KEY_RESIZE) {
+            event.type = EVENT_RESIZE;
+        }
+        else{
+            event.type = EVENT_KEY;
+            if (event.key == 27){
+                int k = getch();
+                if (k == -1){
+                    // Esc Was pressed
+                    event.type = EVENT_ESC;
+                }
+                else {
+                    // Alt was pressed
+                    event.key = k;
+                    event.alt_key = 1;
+                }
+            }
         }
         // Draw new world
-        r = world_event(&world,game);
+        event.time_ms = clock();
+        r = world_event(&event,game);
         refresh();
+        event.time_ms = clock();
         // set new timeout
-        timeout(world.interval);
+        int nt = next_timeout - event.time_ms;
+        //printf("%d\n",nt);
+        if (nt > 0){
+            timeout(nt);
         }
+        else {
+            timeout(TIMEOUT);
+            next_timeout = event.time_ms + TIMEOUT;
+        }
+    }
+    memset(&event,0,sizeof(struct event));
+    event.height = LINES;
+    event.width = COLS;
+    event.type = EVENT_END;
+    event.time_ms = clock();
+    world_event(&event,game);
     if (destroy_game != NULL){
         destroy_game(game);
     }

world.h

@@ -2,6 +2,7 @@
 #define _WORLD_H_
 
 #include <curses.h>
+
 /**
  * World represented as a rectangular matrix of colorful characters.
  * 
@@ -9,7 +10,17 @@
  * 
  */
 
-struct world {
+enum event_type {
+    EVENT_START,
+    EVENT_TIMEOUT,
+    EVENT_KEY,
+    EVENT_MOUSE,
+    EVENT_RESIZE,
+    EVENT_ESC,
+    EVENT_END,
+};
+
+struct event {
     /**
      * Last width of the screen.
      */
@@ -18,10 +29,6 @@ struct world {
      * Last height of the screen.
      */
     int height;
-    /**
-     * Interval in miliseconds to wait for next step. 
-     */
-    int interval;
     /**
      * Last pressed key or Curses event.
      *
@@ -48,53 +55,59 @@ struct world {
      * KEY_BACKSPACE
      */
     int key;
-};
-
-
-enum color_stamp {
-    BLACK_FRONT,
-    WHITE_FRONT,
-    RED_FRONT,
-    GREEN_FRONT,
-    BLUE_FRONT,
-    CYAN_FRONT,
-    MAGENTA_FRONT,
-    YELLOW_FRONT,
-    BLACK_BACK,
-    WHITE_BACK,
-    RED_BACK,
-    GREEN_BACK,
-    BLUE_BACK,
-    CYAN_BACK,
-    MAGENTA_BACK,
-    YELLOW_BACK,
+    int alt_key;
+    enum event_type type;
+    int mouse_x;
+    int mouse_y;
+    int mouse_left;
+    int mouse_right;
+    int mouse_middle;
+    long int time_ms;
 };
 
 /**
  * Sets cell to a state.
- * @param world
+ * @param event 
  * @param x coordinate of cell
  * @param y coordinate of cell
  * @param new state of the cell
  */
-void set_cell(struct world* w,int character,int x,int y);
+void set_cell(int character,int x,int y);
+
+/**
+ * COLOR_BLACK   0
+ * COLOR_RED     1
+ * COLOR_GREEN   2
+ * COLOR_YELLOW  3
+ * COLOR_BLUE    4
+ * COLOR_MAGENTA 5
+ * COLOR_CYAN    6
+ * COLOR_WHITE   7
+ */
+
+#define COLOR_COUNT 8
+
+void set_color_cell(int character,int x,int y,short front_color,short back_color);
 
-void stamp_cell(struct world* w,int character,enum color_stamp stamp,int x,int y);
 
 /**
  *
- * @param world
+ * @param event
  * @param number of commandline arguments
  * @param init_world
  * @param destroy_world
  *
- * void init_world(struct world* w);
+ * void init_world(struct event* w);
  * Initializes user state.
  * Free user state.
- * @param world
+ * @param event
  */
 
-int start_world(int (*world_event)(struct world* world,void* game),void* (*init_game)(struct world* world),void (*destroy_game)(void* game));
+int start_world(void* (*init_game)(),int (*world_event)(struct event* event,void* game),void (*destroy_game)(void* game));
 
+void game_speed(int value);
+
+void set_message(const char* message,int x,int y);
+void clear_screen();
 
 #endif