}
}
-sokoban_screen *parse_screen(FILE *stream)
+sokoban_screen *parse_screen(FILE *stream, bool safe)
{
- int buffer, x, y, agent_x, agent_y;
+ int buffer, x, y, agent_x, agent_y, boxes, targets, agents;
x = 0;
y = 0;
agent_x = 0;
agent_y = 0;
+ boxes = 0;
+ targets = 0;
+ agents = 0;
sokoban_screen *screen = NULL;
while((buffer = fgetc(stream)) != EOF){
if (buffer == '\n'){
screen = add_coord(x, y, AGENT, screen);
agent_x = x;
agent_y = y;
+ agents++;
+ break;
+ case '.':
+ screen = add_coord(x, y, TARGET, screen);
+ targets++;
break;
- case '.': screen = add_coord(x, y, TARGET, screen); break;
case '#': screen = add_coord(x, y, WALL, screen); break;
- case '$': screen = add_coord(x, y, BOX, screen); break;
- case '*': screen = add_coord(x, y, TARGBOX, screen); break;
- case '+': screen = add_coord(x, y, TARGAGENT, screen); break;
+ case '$':
+ screen = add_coord(x, y, BOX, screen);
+ boxes++;
+ break;
+ case '*':
+ screen = add_coord(x, y, TARGBOX, screen);
+ boxes++;
+ targets++;
+ break;
+ case '+':
+ screen = add_coord(x, y, TARGAGENT, screen);
+ agent_x = x;
+ agent_y = y;
+ agents++;
+ targets++;
+ break;
default: return NULL;
}
x++;
}
}
+ if(safe == true && boxes == 0){
+ fprintf(stderr,
+ "Invalid screen. You need at least 1 box\n");
+ exit(1);
+ }
+ if(safe == true && boxes != targets){
+ fprintf(stderr,
+ "Invalid screen. Boxes: %d, Targets: %d\n", boxes, targets);
+ exit(1);
+ }
+ if(safe == true && agents != 1){
+ fprintf(stderr,
+ "Invalid screen. There has to be exactly one agent. Found: %d\n",
+ agents);
+ exit(1);
+ }
+
sokoban_screen *newscreen = NULL;
newscreen = sokoban_shrink(agent_x, agent_y, screen, newscreen);
- //sokoban_print(screen); //unshrinked screen
sokoban_free(screen);
return newscreen;
}