+ char * prefix = "move_";
+ uint8_t len_pref = strlen(prefix);
+ if (!strncmp(prefix, command, len_pref) && strlen(command) - 1 == len_pref)
+ {
+ uint8_t open_north = world.look_pos.y > 0;
+ uint8_t open_south = world.look_pos.y < world.map.length - 1;
+ uint8_t open_west = world.look_pos.x > 0;
+ uint8_t open_east = world.look_pos.x < world.map.length - 1;
+ uint8_t indent = world.look_pos.y % 2;
+ if ('s' == command[len_pref])
+ {
+ world.look_pos.x = world.look_pos.x - open_west;
+ }
+ else if ('d' == command[len_pref])
+ {
+ world.look_pos.x = world.look_pos.x + open_east;
+ }
+ else if ('w' == command[len_pref])
+ {
+ world.look_pos.y = world.look_pos.y - open_north;
+ world.look_pos.x = world.look_pos.x - !indent * open_west;
+ }
+ else if ('e' == command[len_pref])
+ {
+ world.look_pos.y = world.look_pos.y - open_north;
+ world.look_pos.x = world.look_pos.x + indent * open_east;
+ }
+ else if ('x' == command[len_pref])
+ {
+ world.look_pos.y = world.look_pos.y + open_south;
+ world.look_pos.x = world.look_pos.x - !indent * open_west;
+ }
+ else if ('c' == command[len_pref])
+ {
+ world.look_pos.y = world.look_pos.y + open_south;
+ world.look_pos.x = world.look_pos.x + indent * open_east;
+ }
+ else
+ {
+ return 0;
+ }
+ query_mapcell();
+ return 1;
+ }
+ return 0;