1#include <u.h>
  2#include <libc.h>
  3#include <draw.h>
  4
  5#include "sokoban.h"
  6
  7/* pretty ghastly, if you ask me */
  8void
  9move(int key)
 10{
 11	Point g = level.glenda;
 12	int moved = 0;
 13
 14	/* this is messy; no time for math */
 15	switch(key) {
 16	case Up:
 17		switch(level.board[g.x][g.y-1]) {
 18		case Empty:
 19		case Goal:
 20			moved = 1;
 21			level.glenda = Pt(g.x, g.y-1);
 22			break;
 23		case Cargo:
 24		case GoalCargo:
 25			switch(level.board[g.x][g.y-2]) {
 26			case Empty:
 27				moved = 1;
 28				level.board[g.x][g.y-2] = Cargo;
 29				drawboard(Pt(g.x, g.y-2));
 30				break;
 31			case Goal:
 32				moved = 1;
 33				level.board[g.x][g.y-2] = GoalCargo;
 34				drawboard(Pt(g.x, g.y-2));
 35				break;
 36			}
 37			if(moved) {
 38				level.board[g.x][g.y-1] = (level.board[g.x][g.y-1] == Cargo) ? Empty : Goal;
 39				level.glenda = Pt(g.x, g.y-1);
 40			}
 41			break;
 42		}
 43		break;
 44	case Down:
 45		switch(level.board[g.x][g.y+1]) {
 46		case Empty:
 47		case Goal:
 48			moved = 1;
 49			level.glenda = Pt(g.x, g.y+1);
 50			break;
 51		case Cargo:
 52		case GoalCargo:
 53			switch(level.board[g.x][g.y+2]) {
 54			case Empty:
 55				moved = 1;
 56				level.board[g.x][g.y+2] = Cargo;
 57				drawboard(Pt(g.x, g.y+2));
 58				break;
 59			case Goal:
 60				moved = 1;
 61				level.board[g.x][g.y+2] = GoalCargo;
 62				drawboard(Pt(g.x, g.y+2));
 63				break;
 64			}
 65			if(moved) {
 66				level.board[g.x][g.y+1] = (level.board[g.x][g.y+1] == Cargo) ? Empty : Goal;
 67				level.glenda = Pt(g.x, g.y+1);
 68			}
 69			break;
 70		}
 71		break;
 72	case Left:
 73		glenda = gleft;
 74		switch(level.board[g.x-1][g.y]) {
 75		case Empty:
 76		case Goal:
 77			moved = 1;
 78			level.glenda = Pt(g.x-1, g.y);
 79			break;
 80		case Cargo:
 81		case GoalCargo:
 82			switch(level.board[g.x-2][g.y]) {
 83			case Empty:
 84				moved = 1;
 85				level.board[g.x-2][g.y] = Cargo;
 86				drawboard(Pt(g.x-2, g.y));
 87				break;
 88			case Goal:
 89				moved = 1;
 90				level.board[g.x-2][g.y] = GoalCargo;
 91				drawboard(Pt(g.x-2, g.y));
 92				break;
 93			}
 94			if(moved) {
 95				level.board[g.x-1][g.y] = (level.board[g.x-1][g.y] == Cargo) ? Empty : Goal;
 96				level.glenda = Pt(g.x-1, g.y);
 97			}
 98			break;
 99		}
100		break;
101	case Right:
102		glenda = gright;
103		switch(level.board[g.x+1][g.y]) {
104		case Empty:
105		case Goal:
106			moved = 1;
107			level.glenda = Pt(g.x+1, g.y);
108			break;
109		case Cargo:
110		case GoalCargo:
111			switch(level.board[g.x+2][g.y]) {
112			case Empty:
113				moved = 1;
114				level.board[g.x+2][g.y] = Cargo;
115				drawboard(Pt(g.x+2, g.y));
116				break;
117			case Goal:
118				moved = 1;
119				level.board[g.x+2][g.y] = GoalCargo;
120				drawboard(Pt(g.x+2, g.y));
121				break;
122			}
123			if(moved) {
124				level.board[g.x+1][g.y] = (level.board[g.x+1][g.y] == Cargo) ? Empty : Goal;
125				level.glenda = Pt(g.x+1, g.y);
126			}
127			break;
128		}
129		break;
130	}
131	if(moved)
132		drawboard(Pt(g.x, g.y));
133
134	drawglenda();
135}
136
137