Plan 9 from Bell Labs 2004-09-22

dist/replica/_plan9.db

@@ -3328,6 +3328,30 @@ sys/doc/venti/venti.ps - 664 sys sys 1019852320 2012620
 sys/games - 20000000775 sys sys 952648872 0
 sys/games/lib - 20000000775 sys sys 952648879 0
 sys/games/lib/fortunes - 664 sys sys 1095732976 249846
+sys/games/lib/mahjongg - 20000000775 sys sys 1095792278 0
+sys/games/lib/mahjongg/backgrounds - 20000000775 sys sys 1095792293 0
+sys/games/lib/mahjongg/backgrounds/default.bit - 664 sys sys 1095792293 346803
+sys/games/lib/mahjongg/images - 20000000775 sys sys 1095792294 0
+sys/games/lib/mahjongg/images/border.bit - 664 sys sys 1095792293 4057
+sys/games/lib/mahjongg/images/gameover.bit - 664 sys sys 1095792294 50228
+sys/games/lib/mahjongg/images/mask.bit - 644 sys sys 1095792294 429
+sys/games/lib/mahjongg/layouts - 20000000775 sys sys 1095792294 0
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+sys/games/lib/sokoban - 20000000775 sys sys 1095792014 0
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+sys/games/lib/sokoban/images/empty.bit - 664 sys sys 1095792098 658
+sys/games/lib/sokoban/images/goal.bit - 664 sys sys 1095792098 1879
+sys/games/lib/sokoban/images/goalcargo.bit - 664 sys sys 1095792098 4286
+sys/games/lib/sokoban/images/left.bit - 664 sys sys 1095792098 2707
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+sys/games/lib/sokoban/images/wall.bit - 664 sys sys 1095792098 5335
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+sys/games/lib/sokoban/levels - 20000000775 sys sys 1095792098 0
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+sys/games/lib/sokoban/levels/hard.slc - 644 sys sys 1095792098 17051
 sys/include - 20000000775 sys sys 1016902416 0
 sys/include/9p.h - 664 sys sys 1091904420 4392
 sys/include/String.h - 664 sys sys 1091904425 1319
@@ -4661,6 +4685,7 @@ sys/man/1/filter - 664 sys sys 1041108741 4403
 sys/man/1/fmt - 664 sys sys 1070032221 1557
 sys/man/1/fortune - 664 sys sys 944959673 449
 sys/man/1/freq - 664 sys sys 944959673 735
+sys/man/1/games - 664 sys sys 1095792424 1853
 sys/man/1/grap - 664 sys sys 944959675 6417
 sys/man/1/graph - 664 sys sys 944959673 2858
 sys/man/1/grep - 664 sys sys 969512677 2224
@@ -9452,7 +9477,7 @@ sys/src/cmd/ip/ppp/dotest - 775 sys sys 944961006 152
 sys/src/cmd/ip/ppp/ipaux.c - 664 sys sys 1015090266 2326
 sys/src/cmd/ip/ppp/mkfile - 664 sys sys 1063897576 352
 sys/src/cmd/ip/ppp/mppc.c - 664 sys sys 1015090267 16624
-sys/src/cmd/ip/ppp/ppp.c - 664 sys sys 1072729353 59503
+sys/src/cmd/ip/ppp/ppp.c - 664 sys sys 1095775907 59692
 sys/src/cmd/ip/ppp/ppp.h - 664 sys sys 1091904423 8284
 sys/src/cmd/ip/ppp/testppp.c - 664 sys sys 1045505281 3011
 sys/src/cmd/ip/ppp/thw.c - 664 sys sys 1015090268 5962
@@ -11245,6 +11270,20 @@ sys/src/fs/sony/io.h - 664 sys sys 1037805175 6576
 sys/src/fs/sony/mem.h - 664 sys sys 1015110103 2865
 sys/src/fs/sony/mkfile - 664 sys sys 1091803623 1594
 sys/src/fs/worms - 664 sys sys 1015110031 2806
+sys/src/games - 20000000775 sys sys 1095792091 0
+sys/src/games/mahjongg - 20000000775 sys sys 1095792293 0
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+sys/src/games/mahjongg/level.c - 644 sys sys 1095792293 2522
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+sys/src/games/mahjongg/mahjongg.h - 644 sys sys 1095792293 1606
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+sys/src/games/sokoban - 20000000775 sys sys 1095792097 0
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+sys/src/games/sokoban/move.c - 664 sys sys 1095792097 2671
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 sys/src/lib9p - 20000000775 sys sys 1015023311 0
 sys/src/lib9p/_post.c - 664 sys sys 1044836326 1641
 sys/src/lib9p/dirread.c - 664 sys sys 1015023310 641
@@ -12338,3 +12377,4 @@ usr/glenda/lib/profile - 664 glenda glenda 1021580005 847
 usr/glenda/readme.acme - 664 glenda glenda 1019860628 4753
 usr/glenda/readme.rio - 664 glenda glenda 1019860628 6370
 usr/glenda/tmp - 20000000775 glenda glenda 1018802620 0
+386/bin/ip/ppp - 775 sys sys 1095822523 216624

dist/replica/plan9.db

@@ -279,7 +279,7 @@
 386/bin/ip/imap4d - 775 sys sys 1085077070 234217
 386/bin/ip/ipconfig - 775 sys sys 1089257533 135811
 386/bin/ip/ping - 775 sys sys 1089257533 75000
-386/bin/ip/ppp - 775 sys sys 1089257534 216401
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 386/bin/ip/pppoe - 775 sys sys 1089257534 75540
 386/bin/ip/pptp - 775 sys sys 1089257534 124731
 386/bin/ip/pptpd - 775 sys sys 1089257535 123832
@@ -3328,6 +3328,30 @@ sys/doc/venti/venti.ps - 664 sys sys 1019852320 2012620
 sys/games - 20000000775 sys sys 952648872 0
 sys/games/lib - 20000000775 sys sys 952648879 0
 sys/games/lib/fortunes - 664 sys sys 1095732976 249846
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+sys/games/lib/sokoban/images/goal.bit - 664 sys sys 1095792098 1879
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+sys/games/lib/sokoban/images/left.bit - 664 sys sys 1095792098 2707
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 sys/include - 20000000775 sys sys 1016902416 0
 sys/include/9p.h - 664 sys sys 1091904420 4392
 sys/include/String.h - 664 sys sys 1091904425 1319
@@ -4661,6 +4685,7 @@ sys/man/1/filter - 664 sys sys 1041108741 4403
 sys/man/1/fmt - 664 sys sys 1070032221 1557
 sys/man/1/fortune - 664 sys sys 944959673 449
 sys/man/1/freq - 664 sys sys 944959673 735
+sys/man/1/games - 664 sys sys 1095792424 1853
 sys/man/1/grap - 664 sys sys 944959675 6417
 sys/man/1/graph - 664 sys sys 944959673 2858
 sys/man/1/grep - 664 sys sys 969512677 2224
@@ -9452,7 +9477,7 @@ sys/src/cmd/ip/ppp/dotest - 775 sys sys 944961006 152
 sys/src/cmd/ip/ppp/ipaux.c - 664 sys sys 1015090266 2326
 sys/src/cmd/ip/ppp/mkfile - 664 sys sys 1063897576 352
 sys/src/cmd/ip/ppp/mppc.c - 664 sys sys 1015090267 16624
-sys/src/cmd/ip/ppp/ppp.c - 664 sys sys 1072729353 59503
+sys/src/cmd/ip/ppp/ppp.c - 664 sys sys 1095775907 59692
 sys/src/cmd/ip/ppp/ppp.h - 664 sys sys 1091904423 8284
 sys/src/cmd/ip/ppp/testppp.c - 664 sys sys 1045505281 3011
 sys/src/cmd/ip/ppp/thw.c - 664 sys sys 1015090268 5962
@@ -11245,6 +11270,20 @@ sys/src/fs/sony/io.h - 664 sys sys 1037805175 6576
 sys/src/fs/sony/mem.h - 664 sys sys 1015110103 2865
 sys/src/fs/sony/mkfile - 664 sys sys 1091803623 1594
 sys/src/fs/worms - 664 sys sys 1015110031 2806
+sys/src/games - 20000000775 sys sys 1095792091 0
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 sys/src/lib9p - 20000000775 sys sys 1015023311 0
 sys/src/lib9p/_post.c - 664 sys sys 1044836326 1641
 sys/src/lib9p/dirread.c - 664 sys sys 1015023310 641

dist/replica/plan9.log

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sys/games/lib/mahjongg/layouts/default.layout

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sys/games/lib/sokoban/levels/easy.slc

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sys/man/1/games

@@ -0,0 +1,86 @@
+.TH GAMES 1
+.SH NAME
+mahjongg, sokoban \- time wasters
+.SH SYNOPSIS
+.B games/mahjongg
+[
+.B -c
+] [
+.B -b
+.I background
+] [
+.B -t 
+.I tileset
+] [
+.B -l
+.I layout
+]
+.br
+.B games/sokoban
+[
+.B level
+]
+.SH DESCRIPTION
+There are a few games in
+.BR /bin/games :
+.TP
+.B mahjongg
+Remove all tiles
+from the board. Click on tiles with the same face that
+are not blocked by others. A blocked tile is one that is partially or
+fully covered on top or has neighbouring tiles to the left and right.
+The game finishes when either all tiles are gone or there are no
+more moves left. The arguments are for changing background
+.RB (-b),
+tile
+.RB (-t)
+and layout
+.RB (-l)
+images;
+.RB -c
+selects a true-color buffer image, use with
+drawterm or in case selecting a tile obscures it completely.
+The 
+.LR N
+key will generate a new level, 
+.LR R
+restarts the current one. 
+.LR Q
+and 
+.LR Del
+quit, 
+.LR H
+gives a hint, either trying to match the currently selected tile, or if no tile is
+selected finding out the first available tile.
+.TP
+.B sokoban
+Guide Glenda through a room full of walls, pebbles and holes to put
+the pebbles in.  Your goal is to arrange all pebbles into holes by
+pushing them around, but you can only push a pebble if there is no
+wall or another pebble blocking the way.
+Arrow keys move Glenda up-down-left-right.  
+.LR N 
+and 
+.LR P 
+keys switch between
+the next and previous levels, 
+.LR R
+restarts the current level.  
+.LR Del 
+and
+.LR Q
+quit.  The right mouse button invokes a menu to restart the current level or load different
+level sets.  The middle mouse button lets you change between levels. 
+.I Sokoban
+accepts a level file as its argument.
+.SH FILES
+.TP
+.B /sys/games/lib/mahjongg/*
+image sprites, levels and backgrounds used by
+.I mahjongg
+.TP
+.B /sys/games/lib/sokoban/*
+image sprites and levels used by
+.I sokoban
+.SH SOURCE
+.B /sys/src/games

sys/src/cmd/ip/ppp/ppp.c

@@ -1525,6 +1525,11 @@ ipopen(PPP *ppp)
 		}
 		buf[n] = 0;
 
+		netlog("ppp: setting up IP interface local %I remote %I (valid %d)\n",
+			ppp->local, ppp->remote, validv4(ppp->remote));
+		if(!validv4(ppp->remote))
+			ipmove(ppp->remote, ppp->local);
+
 		snprint(path, sizeof path, "%s/ipifc/%s/data", ppp->net, buf);
 		fd = open(path, ORDWR);
 		if(fd < 0){

sys/src/games/mahjongg/graphics.c

@@ -0,0 +1,310 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+
+#include "mahjongg.h"
+
+int
+freeup(int d, Point p)
+{
+	/* are we blocked from above? */
+	if(d == Depth -1 || (level.board[d+1][p.x][p.y].which == 0 &&
+			level.board[d+1][p.x+1][p.y].which == 0 &&
+			level.board[d+1][p.x][p.y+1].which == 0 &&
+			level.board[d+1][p.x+1][p.y+1].which == 0))
+		return 1;
+	
+	return 0;
+}
+
+int
+freeleft(int d, Point p)
+{
+
+	/* blocked from the left? */
+	if(p.x == 0 || (level.board[d][p.x-1][p.y].which == 0 &&
+		level.board[d][p.x-1][p.y+1].which == 0)) 
+		return 1;
+
+	return 0;
+}
+
+int
+freeright(int d, Point p)
+{		
+	if(p.x == Lx-2 || (level.board[d][p.x+2][p.y].which == 0 &&
+		level.board[d][p.x+2][p.y+1].which == 0))
+		return 1;
+
+	return 0;
+}
+
+int
+isfree(int d, Point p)
+{
+	return (freeleft(d, p) || freeright(d, p)) && freeup(d, p);
+}
+
+void
+clearbrick(int d, Point p)
+{
+	level.board[d][p.x][p.y].which = 0;
+	level.board[d][p.x+1][p.y].which = 0;
+	level.board[d][p.x][p.y+1].which = 0;
+	level.board[d][p.x+1][p.y+1].which = 0;
+}
+
+void
+resize(Point p)
+{
+	/* resize to the size of the current level */
+
+	int fd;
+
+	fd = open("/dev/wctl", OWRITE);
+	if(fd >= 0){
+		fprint(fd, "resize -dx %d -dy %d", p.x, p.y);
+		close(fd);
+	}
+
+}
+
+void
+drawbrick(int d, int x, int y)
+{
+	Point p;
+	Rectangle r;
+
+	p = Pt(x*(Facex/2)-(d*TileDxy), y*(Facey/2)-(d*TileDxy));
+	r = Rpt(p, addpt(p, Pt(Facex, Facey)));
+	r = rectaddpt(r, Pt(Depth*TileDxy, Depth*TileDxy));
+	draw(img, r, tileset, nil, level.board[d][x][y].start);
+
+	if(level.board[d][x][y].clicked)
+		draw(img, r, selected, nil, ZP);
+
+	/* looks better without borders, uncomment to check it out with'em */
+//	r = Rpt(r.min, addpt(r.min, Pt(Tilex, Tiley)));
+//	draw(img, r, brdr, nil, ZP);
+}
+
+
+void
+drawlevel(void)
+{
+	int d, x, y;
+
+	draw(img, img->r, background, nil, ZP);
+
+	for(d = 0; d < Depth; d++)
+		for(y = 0; y < Ly; y++)
+			for(x = 0; x < Lx; x++)
+				if(level.board[d][x][y].which == 1) 
+					drawbrick(d, x, y);
+
+	draw(screen, screen->r, img, nil, ZP);
+	flushimage(display, 1);
+}
+
+Brick *
+bmatch(int d, Point p)
+{
+	int x, y;
+	int ld = d;
+
+	do {
+		for(y = 0; y < Ly; y++)
+			for(x = 0; x < Lx; x++)
+				if(level.board[ld][x][y].which == 1 && isfree(ld, Pt(x, y)) && !eqpt(Pt(x, y), p) && 
+					level.board[d][p.x][p.y].type == level.board[ld][x][y].type)
+			
+					return &level.board[ld][x][y];
+
+	} while(--ld >= 0);
+
+	return nil;
+}
+
+int
+canmove(void)
+{
+	int d, x, y;
+
+	for(d = Depth - 1; d >= 0; d--) 
+		for(y = 0; y < Ly; y++) 
+			for(x = 0; x < Lx; x++) 
+				if(level.board[d][x][y].which == 1 && isfree(d, Pt(x, y)))
+					if(bmatch(d, Pt(x, y)) != nil)
+						return 1;
+	return 0;
+}
+
+void
+hint(void)
+{
+	Brick *b = nil;
+	int d = 0, x = 0, y = 0;
+
+	if(level.c.d != -1) {
+		if((b = bmatch(level.c.d, level.c.p)) != nil) {
+			d = level.c.d;
+			x = level.c.p.x;
+			y = level.c.p.y;
+		}
+	} else {
+		for(d = Depth - 1; d >= 0; d--) 
+			for(y = 0; y < Ly; y++) 
+				for(x = 0; x < Lx; x++) 
+					if(level.board[d][x][y].which == 1 && isfree(d, Pt(x, y)))
+						if((b = bmatch(d, Pt(x, y))) != nil)
+							goto Matched;
+	}
+
+Matched:
+	if(b != nil) {
+		level.board[d][x][y].clicked = 1;
+		b->clicked = 1;
+		drawlevel();
+		sleep(500);
+		if(level.c.d == -1)
+			level.board[d][x][y].clicked = 0;
+		b->clicked = 0;
+		drawlevel();
+		sleep(500);
+		level.board[d][x][y].clicked = 1;
+		b->clicked = 1;
+		drawlevel();
+		sleep(500);
+		if(level.c.d == -1)
+			level.board[d][x][y].clicked = 0;
+		b->clicked = 0;
+		drawlevel();
+	}
+
+}
+
+void
+done(void)
+{
+	level.done = 1;
+	draw(screen, screen->r, selected, gameover, ZP);
+	draw(screen, screen->r, selected, gameover, ZP);
+	flushimage(display, 1);
+}
+
+
+void
+clicked(Point coord)
+{
+	Point p;
+	int d;
+
+	/* ugly on purpose */
+
+	for(d = Depth - 1; d >= 0; d--) {
+		p = Pt((coord.x + TileDxy*d)/(Facex/2), (coord.y + TileDxy*d)/(Facey/2));
+		switch(level.board[d][p.x][p.y].which) {
+		case 0:
+			break;
+		case 1:
+			goto Found;
+		case 2:
+			p = Pt(p.x-1, p.y);
+			goto Found;
+		case 3:
+			p = Pt(p.x-1, p.y-1);
+			goto Found;
+		case 4:
+			p = Pt(p.x, p.y-1);
+			goto Found;
+		}
+	}
+
+	return;
+
+Found:
+	if(freeup(d, p) && (freeleft(d, p) || freeright(d, p))) {
+		if(level.c.d == -1) {
+			level.c.d = d;
+			level.c.p = p;
+			level.board[d][p.x][p.y].clicked = 1;
+		} else if(!eqpt(p, level.c.p) && 
+			(level.board[d][p.x][p.y].type == level.board[level.c.d][level.c.p.x][level.c.p.y].type)) {
+
+			clearbrick(d, p);
+			clearbrick(level.c.d, level.c.p);
+
+			level.c.d = -1;
+			level.c.p = Pt(0, 0);
+
+			level.remaining -= 2;
+		} else {
+			level.board[d][p.x][p.y].clicked = 0;
+			level.board[level.c.d][level.c.p.x][level.c.p.y].clicked = 0;
+			level.c.d = -1;
+			level.c.p = Pt(0, 0);
+		} 
+		drawlevel();
+		if(!canmove())
+			done();
+	}
+}
+
+/* below only for testing */
+
+Point
+pmatch(int d, Point p)
+{
+	int x, y;
+	int ld = d;
+
+	do {
+		for(y = 0; y < Ly; y++)
+			for(x = 0; x < Lx; x++)
+				if(level.board[ld][x][y].which == 1 && isfree(ld, Pt(x, y)) && !eqpt(Pt(x, y), p) && 
+					level.board[d][p.x][p.y].type == level.board[ld][x][y].type)
+			
+					return Pt(x, y);
+
+	} while(--ld >= 0);
+
+	return Pt(-1, -1);
+}
+
+int
+dmatch(int d, Point p)
+{
+	int x, y;
+	int ld = d;
+
+	do {
+		for(y = 0; y < Ly; y++)
+			for(x = 0; x < Lx; x++)
+				if(level.board[ld][x][y].which == 1 && isfree(ld, Pt(x, y)) && !eqpt(Pt(x, y), p) && 
+					level.board[d][p.x][p.y].type == level.board[ld][x][y].type)
+			
+					return ld;
+
+	} while(--ld >= 0);
+
+	return -1;
+}
+
+void
+clearlevel(void)
+{
+	int d, x, y;
+
+	for(d = Depth - 1; d >= 0; d--) 
+		for(y = 0; y < Ly; y++) 
+			for(x = 0; x < Lx; x++) 
+				if(level.board[d][x][y].which == 1 && isfree(d, Pt(x, y)))
+					if(bmatch(d, Pt(x, y)) != nil) {
+						clearbrick(dmatch(d, Pt(x, y)), pmatch(d, Pt(x, y)));
+						clearbrick(d, Pt(x, y));
+						level.remaining -= 2;
+						drawlevel();
+						clearlevel();
+					}
+}

sys/src/games/mahjongg/level.c

@@ -0,0 +1,150 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <draw.h>
+
+#include "mahjongg.h"
+
+void
+consumeline(Biobuf *b)
+{
+	while(Bgetc(b) != '\n')
+		;
+}
+
+/* parse a level file */
+int
+parse(char *layout)
+{
+	Biobuf *b;
+	int x = 0, y = 0, depth = 0;
+	char c;
+
+	b = Bopen(layout, OREAD);
+	if(b == nil) {
+		fprint(2, "could not open file %s: %r\n", layout);
+		return 0;
+	}
+
+	level.remaining = 0;
+
+	while((c = Bgetc(b)) > 0) {
+		switch(c)  {
+		case '\n':
+			x = 0;
+			y = (y+1) % Ly;
+			if(!y)
+				depth++;
+			break;
+		case '.':
+			orig.board[depth][x][y].which = 0;
+			x++;
+			break;
+		case '1':
+			orig.remaining++;
+		case '2':
+		case '3':
+		case '4':
+			orig.board[depth][x++][y].which = c-48;
+			break;
+		default:
+			consumeline(b);
+			break;
+		}
+	}
+	Bterm(b);
+
+	return 1;
+}
+
+int
+indextype(int type)
+{
+	int t;
+
+	if(type < 108) 	
+		t = (type/36)*Facey * 9 + ((type%36)/4)*Facex;
+	else if(type < 112)
+		t = Seasons;
+	else if(type < 128)
+		t = 3*Facey + (((type+12)%36)/4)*Facex;
+	else if(type < 132)
+		t = Flowers;
+	else
+		t = 4*Facey + (((type+28)%36)/4)*Facex;
+
+	return t;
+
+}
+
+Point
+indexpt(int type)
+{
+	Point p;
+	
+	/* the first 108 bricks are 4 of each, 36 per line:
+	 * 	x = (index%36)/4
+	 *	y = (index)/36
+	 * then multiply by the size of a single tile.
+	 * the next 4 are the seasons, so x = index%4...
+	 *
+	 * and so on...
+	 */
+		
+	if(type < 108) {
+		p = Pt(((type%36)/4)*Facex, (type/36)*Facey);
+	} else if(type < 112) {
+		p = Pt((type%4)*Facex, 3*Facey);
+	} else if(type < 128) {
+		p = Pt((((type+12)%36)/4)*Facex, 3*Facey);
+	} else if(type < 132) {
+		p = Pt(((type+4)%4)*Facex, 4*Facey);
+	} else {
+		p = Pt((((type+28)%36)/4)*Facex, 4*Facey);
+	}
+
+	return p;
+}
+
+/* use the seed to generate a replayable game */
+void
+generate(uint seed)
+{
+	Point p;
+	int x, y, d, n;
+	int order[144];
+
+	srand(seed);
+
+	for (x = 0; x < Tiles; x++)
+		order[x] = x;
+
+	for(x = 0; x < Tiles; x++) {
+		n = order[x];
+		y = nrand(Tiles);
+		order[x] = order[y];
+		order[y] = n;
+	}
+	
+	n = 0;
+	for(d = 0; d < Depth; d++)
+		for(y = 0; y < Ly; y++)
+			for(x = 0; x < Lx; x++)
+				if(orig.board[d][x][y].which == 1) {
+
+					orig.board[d][x][y].type = indextype(order[n]);
+					p = indexpt(order[n++]);
+					orig.board[d][x][y].start = p;
+					orig.board[d][x+1][y].start = p;
+					orig.board[d][x][y+1].start = p;
+					orig.board[d][x+1][y+1].start = p;
+				}
+
+	if(n != orig.remaining)
+		fprint(2, "level improperly generated: %d elements, should have %d\n", n, orig.remaining);
+
+	orig.c.d = -1;
+	orig.c.p = Pt(0, 0);
+	orig.done = 0;
+	level = orig;
+}

sys/src/games/mahjongg/mahjongg.c

@@ -0,0 +1,203 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+
+#include "mahjongg.h"
+
+char *Border = "/sys/games/lib/mahjongg/images/border.bit";
+char *Mask = "/sys/games/lib/mahjongg/images/mask.bit";
+char *Gameover = "/sys/games/lib/mahjongg/images/gameover.bit";
+
+char *deftileset = "/sys/games/lib/mahjongg/tilesets/default.tileset";
+char *defbackgr = "/sys/games/lib/mahjongg/backgrounds/default.bit";
+char *deflayout = "/sys/games/lib/mahjongg/layouts/default.layout";
+ulong defchan;
+
+
+char *buttons[] = 
+{
+	"new",
+	"restart",
+	"resize",
+	"exit",
+	0
+};
+
+Menu menu = 
+{
+	buttons
+};
+
+void
+usage(char *progname)
+{
+	fprint(2, "usage: %s [-b background] [-l layout] [-t tileset] -c\n", progname);
+	exits("usage");
+}
+
+Image *
+eallocimage(Rectangle r, int repl, uint chan, uint color)
+{
+	Image *tmp;
+
+	tmp = allocimage(display, r, chan, repl, color);
+	if(tmp == nil)
+		sysfatal("cannot allocate buffer image: %r");
+
+	return tmp;
+}
+
+Image *
+eloadfile(char *path)
+{
+	Image *img;
+	int fd;
+
+	fd = open(path, OREAD);
+	if(fd < 0) {
+		fprint(2, "cannot open image file %s: %r\n", path);
+		exits("image");
+	}
+	img = readimage(display, fd, 0);
+	if(img == nil)
+		sysfatal("cannot load image: %r");
+	close(fd);
+	
+	return img;
+}
+
+
+void
+allocimages(void)
+{
+	Rectangle one = Rect(0, 0, 1, 1);
+	
+	selected = eallocimage(one, 1, RGBA32, setalpha(DPalebluegreen, 0x5f));
+	img = eallocimage(Rect(0, 0, Sizex, Sizey), 0, defchan ? defchan : screen->chan, DBlack);
+
+	background = eloadfile(defbackgr);
+	replclipr(background, 1, img->r);
+
+	mask = eloadfile(Mask);
+	gameover = eloadfile(Gameover);
+	tileset = eloadfile(deftileset);
+}
+
+
+void
+eresized(int new)
+{
+	if(new && getwindow(display, Refnone) < 0)
+		sysfatal("can't reattach to window");
+	
+	drawlevel();
+}
+
+void 
+main(int argc, char **argv)
+{
+	Mouse m;
+	Event e;
+	int clickety = 0;
+
+	ARGBEGIN{
+	case 'h':
+		usage(argv0);
+	case 'b':
+		defbackgr = EARGF(usage(argv0));
+		break;
+	case 'l':
+		deflayout = EARGF(usage(argv0));
+		break;
+	case 't':
+		deftileset = EARGF(usage(argv0));
+		break;
+	case 'c':
+		defchan = RGBA32;
+		break;
+	}ARGEND
+
+	if(argc > 0) 
+		usage(argv0);
+		
+	if(! parse(deflayout)) {
+		fprint(2, "usage: %s [levelfile]\n", argv[0]);
+		exits("usage");
+	}
+
+	if(initdraw(nil, nil, "mahjongg") < 0)
+		sysfatal("initdraw failed: %r");
+	einit(Emouse|Ekeyboard);
+
+	allocimages();
+	resize(img->r.max);
+
+	generate(time(0));
+	drawlevel();
+	for(;;) {
+		if(level.remaining == 0 && !level.done)
+			done();
+		switch(event(&e)) {
+		case Emouse:
+			m = e.mouse;
+			if(m.buttons&1) {
+				if(level.done)
+					break;
+				if(!clickety && level.remaining > 0) {
+					clickety = 1;
+					clicked(subpt(m.xy, addpt(screen->r.min, Pt(30, 30))));
+				}
+			} else 
+				clickety = 0;
+			if(m.buttons&2) {
+				/* nothing here for the moment */
+			}
+			if(m.buttons&4)
+				switch(emenuhit(3, &m, &menu)) {
+				case 0:
+					generate(time(0));
+					drawlevel();
+					break;
+				case 1:
+					level = orig;
+					drawlevel();
+					break;
+				case 2:
+					resize(img->r.max);
+					break;
+				case 3:
+					exits(nil);
+				}
+			break;
+		case 2:
+			switch(e.kbdc) {
+			case 127:
+			case 'q':
+			case 'Q':
+				exits(nil);
+			case 'h':
+			case 'H':
+				if(!level.done)
+					hint();
+				break;
+			case 'n':
+			case 'N':
+				/* new */
+				generate(time(0));
+				break;
+			case 'r':
+			case 'R':
+				level = orig;
+				break;
+			case 'c':
+			case 'C':
+				clearlevel();
+				break;
+			}
+			if(! level.done)
+				drawlevel();
+			break;
+		}
+	}
+}

sys/src/games/mahjongg/mahjongg.h

@@ -0,0 +1,88 @@
+enum {
+
+	/* 
+	 * D[1-4], the seasons, appear only once
+	 * F[1-4], the flowers, appear only once
+	 * everything else appears 4 times
+	 * for a total of 144
+	 */
+	A1 = 0, A2, A3, A4, A5, A6, A7, A8, A9,
+	B1, B2, B3, B4, B5, B6, B7, B8, B9,
+	C1, C2, C3, C4, C5, C6, C7, C8, C9,	
+	D1, D2, D3, D4, E1, E2, E3, E4, 
+	F1, F2, F3, F4, G1, G2, G3,
+	Seasons,
+	Flowers,
+}; 
+
+enum {
+	/* level-specific enums */
+	Tiles = 144,
+	Depth = 5,
+	TileDxy = 6,	/* tile displacement when on a higher level */
+	Lx = 32,
+	Ly = 16,
+};
+enum {
+	/* the size of a complete tile */
+	Tilex = 60,
+	Tiley = 74,
+	
+	/* only the face part */
+	Facex = 54,
+	Facey = 68,
+
+	/* and the entire window, giving room for 5*6 = 30 pixels
+	 * that are needed for the higher tiles
+	 */
+	Sizex = 16*Facex + 2*Depth*TileDxy,
+	Sizey = 8*Facey + 2*Depth*TileDxy,
+};
+
+
+typedef struct {
+	Point start;	/* where do we draw here */
+	int clicked;
+	int which;		/* 0 ↔ 4 */
+	int type;
+} Brick;
+
+typedef struct {
+	int d;
+	Point p;
+} Click;
+
+typedef struct {
+	Brick 	board[Depth][Lx][Ly];
+	Click		c; 		/* player has a brick selected */
+	int			done;
+	int 		remaining;
+} Level;
+
+Level level;	/* the level played */
+Level orig;		/* same, sans modifications */
+
+Image *img;		/* buffer */
+
+Image *tileset;
+Image *brdr;
+Image *mask;
+Image *background;
+Image *selected;
+Image *gameover;
+
+/* graphics.c */
+void drawlevel(void);
+void resize(Point);
+void clicked(Point);
+void hint(void);
+void done(void);
+void clearlevel(void);
+
+/* mahjongg.c */
+char *genlevels(int);
+Image *eallocimage(Rectangle, int, uint, uint);
+
+/* level.c */
+int parse(char *);
+void generate(uint seed);

sys/src/games/mahjongg/mkfile

@@ -0,0 +1,19 @@
+</$objtype/mkfile
+BIN=/$objtype/bin/games
+
+TARG=mahjongg
+OFILES=\
+	mahjongg.$O\
+	graphics.$O\
+	level.$O\
+
+
+HFILES=mahjongg.h\
+
+UPDATE=\
+	mkfile\
+	$HFILES\
+	${OFILES:%.$O=%.c}\
+	`{ls /sys/games/lib/mahjongg/*}
+
+</sys/src/cmd/mkone

sys/src/games/sokoban/graphics.c

@@ -0,0 +1,124 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+
+#include "sokoban.h"
+
+void
+drawscreen(void)
+{
+	draw(screen, screen->r, img, nil, ZP);
+	flushimage(display, 1);
+}
+
+void
+drawglenda(void)
+{
+	Rectangle r;
+	Point p;
+
+	p = level.glenda;
+	p.x *= BoardX;
+	p.y *= BoardY;
+	/* leave some room from the edge of the window */
+	p = addpt(p, Pt(1, 1));
+
+	r = Rpt(p, Pt(p.x + BoardX, p.y+BoardY));
+	draw(img, r, glenda, nil, ZP);
+}
+
+void
+drawwin(void)
+{
+	Rectangle r;
+	Point p;
+
+	p = level.glenda;
+	p.x *= BoardX;
+	p.y *= BoardY;
+	p = addpt(p, Pt(6, 6));
+	p = addpt(p, Pt(1, 1));
+
+	r = Rpt(p, Pt(p.x + BoardX, p.y+BoardY));
+	draw(img, r, text, win, ZP);
+}
+
+void
+drawboard(Point p)
+{
+	Rectangle r;
+	uint square = level.board[p.x][p.y];
+
+	p.x *= BoardX;
+	p.y *= BoardY;
+
+	/* leave some room from the edge of the window */
+	p = addpt(p, Pt(1, 1));
+
+	r = Rpt(p, Pt(p.x + BoardX, p.y+BoardY));
+
+	switch(square) {
+	case Background:
+		draw(img, r, bg, nil, ZP);
+		break;
+	case Empty:
+		draw(img, r, empty, nil, ZP);
+		break;
+	case Wall:
+		draw(img, r, wall, nil, ZP);
+		break;
+	case Cargo:
+		draw(img, r, cargo, nil, ZP);
+		break;
+	case Goal:
+		draw(img, r, goal, nil, ZP);
+		break;
+	case GoalCargo:
+		draw(img, r, goalcargo, nil, ZP);
+		break;
+	}
+}
+
+void
+resize(Point p)
+{
+	/* resize to the size of the current level */
+
+	int fd;
+
+	fd = open("/dev/wctl", OWRITE);
+	if(fd >= 0){
+		fprint(fd, "resize -dx %d -dy %d", p.x*BoardX+10, p.y*BoardY+10);
+		close(fd);
+	}
+
+}
+
+Point
+boardsize(Point p)
+{
+	return Pt(p.x*BoardX+2, p.y*BoardY+2);
+}
+
+void
+drawlevel(void)
+{
+	int x, y;
+
+	resize(level.max);
+
+	if(img)
+		freeimage(img);
+	img = eallocimage(Rpt(Pt(0, 0), boardsize(level.max)), 0, 0);	
+
+	draw(img, insetrect(img->r, 1), empty, nil, ZP);
+
+	for(x = 0; x < MazeX; x++) {
+		for(y = 0; y < MazeY; y++) {
+			drawboard(Pt(x, y));
+		}
+	}
+
+	drawglenda();
+}

sys/src/games/sokoban/level.c

@@ -0,0 +1,101 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <draw.h>
+
+#include "sokoban.h"
+
+void
+consumeline(Biobuf *b)
+{
+	while(Bgetc(b) != '\n')
+		;
+}
+
+/* parse a level file */
+int
+loadlevels(char *path)
+{
+	Biobuf *b;
+	int x = 0, y = 0, lnum = 0;
+	char c;
+		
+	if(path == nil)
+		return 0;
+
+	b = Bopen(path, OREAD);
+	if(b == nil) {
+		fprint(2, "could not open file %s: %r\n", path);
+		return 0;
+	}
+
+	memset(levels, 0, Maxlevels*sizeof(Level));
+	
+	while((c = Bgetc(b)) > 0) {
+		switch(c)  {
+		case ';':
+			consumeline(b); 	/* no ';'-comments in the middle of a level */
+			break;
+		case '\n':
+			levels[lnum].index = lnum;
+			levels[lnum].done = 0;
+			x = 0;
+			levels[lnum].max.y = ++y;
+
+			c = Bgetc(b);
+			if(c == '\n' || c == Beof) {
+				/* end of level */
+				if(++lnum == Maxlevels)
+					goto Done;
+
+				x = 0;
+				y = 0;
+			} else
+				Bungetc(b);
+			break;
+		case '#':
+			levels[lnum].board[x][y] = Wall;
+			x++;
+			break;
+		case ' ':
+			levels[lnum].board[x][y] = Empty;
+			x++;
+			break;
+		case '$':
+			levels[lnum].board[x][y] = Cargo;
+			x++;
+			break;
+		case '*':
+			levels[lnum].board[x][y] = GoalCargo;
+			x++;
+			break;
+		case '.':
+			levels[lnum].board[x][y] = Goal;
+			x++;
+			break;
+		case '@':
+			levels[lnum].board[x][y] = Empty;
+			levels[lnum].glenda = Pt(x, y);
+			x++;
+			break;
+		case '+':
+			levels[lnum].board[x][y] = Goal;
+			levels[lnum].glenda = Pt(x, y);
+			x++;
+			break;
+		default:
+			fprint(2, "impossible character for level %d: %c\n", lnum+1, c);
+			return 0;
+		}
+		if(x > levels[lnum].max.x)
+			levels[lnum].max.x = x;
+		levels[lnum].max.y = y;
+	}
+Done:
+	Bterm(b);
+
+	level = levels[0];
+	numlevels = lnum;
+
+	return 1;
+}

sys/src/games/sokoban/mkfile

@@ -0,0 +1,20 @@
+</$objtype/mkfile
+BIN=/$objtype/bin/games
+
+TARG=sokoban
+OFILES=\
+	sokoban.$O\
+	move.$O\
+	graphics.$O\
+	level.$O\
+
+
+HFILES=sokoban.h\
+
+UPDATE=\
+	mkfile\
+	$HFILES\
+	${OFILES:%.$O=%.c}\
+	`{ls /sys/games/lib/sokoban/*}
+
+</sys/src/cmd/mkone

sys/src/games/sokoban/move.c

@@ -0,0 +1,136 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+
+#include "sokoban.h"
+
+/* pretty ghastly, if you ask me */
+void
+move(int key)
+{
+	Point g = level.glenda;
+	int moved = 0;
+
+	/* this is messy; no time for math */
+	switch(key) {
+	case Up:
+		switch(level.board[g.x][g.y-1]) {
+		case Empty:
+		case Goal:
+			moved = 1;
+			level.glenda = Pt(g.x, g.y-1);
+			break;
+		case Cargo:
+		case GoalCargo:
+			switch(level.board[g.x][g.y-2]) {
+			case Empty:
+				moved = 1;
+				level.board[g.x][g.y-2] = Cargo;
+				drawboard(Pt(g.x, g.y-2));
+				break;
+			case Goal:
+				moved = 1;
+				level.board[g.x][g.y-2] = GoalCargo;
+				drawboard(Pt(g.x, g.y-2));
+				break;
+			}
+			if(moved) {
+				level.board[g.x][g.y-1] = (level.board[g.x][g.y-1] == Cargo) ? Empty : Goal;
+				level.glenda = Pt(g.x, g.y-1);
+			}
+			break;
+		}
+		break;
+	case Down:
+		switch(level.board[g.x][g.y+1]) {
+		case Empty:
+		case Goal:
+			moved = 1;
+			level.glenda = Pt(g.x, g.y+1);
+			break;
+		case Cargo:
+		case GoalCargo:
+			switch(level.board[g.x][g.y+2]) {
+			case Empty:
+				moved = 1;
+				level.board[g.x][g.y+2] = Cargo;
+				drawboard(Pt(g.x, g.y+2));
+				break;
+			case Goal:
+				moved = 1;
+				level.board[g.x][g.y+2] = GoalCargo;
+				drawboard(Pt(g.x, g.y+2));
+				break;
+			}
+			if(moved) {
+				level.board[g.x][g.y+1] = (level.board[g.x][g.y+1] == Cargo) ? Empty : Goal;
+				level.glenda = Pt(g.x, g.y+1);
+			}
+			break;
+		}
+		break;
+	case Left:
+		glenda = gleft;
+		switch(level.board[g.x-1][g.y]) {
+		case Empty:
+		case Goal:
+			moved = 1;
+			level.glenda = Pt(g.x-1, g.y);
+			break;
+		case Cargo:
+		case GoalCargo:
+			switch(level.board[g.x-2][g.y]) {
+			case Empty:
+				moved = 1;
+				level.board[g.x-2][g.y] = Cargo;
+				drawboard(Pt(g.x-2, g.y));
+				break;
+			case Goal:
+				moved = 1;
+				level.board[g.x-2][g.y] = GoalCargo;
+				drawboard(Pt(g.x-2, g.y));
+				break;
+			}
+			if(moved) {
+				level.board[g.x-1][g.y] = (level.board[g.x-1][g.y] == Cargo) ? Empty : Goal;
+				level.glenda = Pt(g.x-1, g.y);
+			}
+			break;
+		}
+		break;
+	case Right:
+		glenda = gright;
+		switch(level.board[g.x+1][g.y]) {
+		case Empty:
+		case Goal:
+			moved = 1;
+			level.glenda = Pt(g.x+1, g.y);
+			break;
+		case Cargo:
+		case GoalCargo:
+			switch(level.board[g.x+2][g.y]) {
+			case Empty:
+				moved = 1;
+				level.board[g.x+2][g.y] = Cargo;
+				drawboard(Pt(g.x+2, g.y));
+				break;
+			case Goal:
+				moved = 1;
+				level.board[g.x+2][g.y] = GoalCargo;
+				drawboard(Pt(g.x+2, g.y));
+				break;
+			}
+			if(moved) {
+				level.board[g.x+1][g.y] = (level.board[g.x+1][g.y] == Cargo) ? Empty : Goal;
+				level.glenda = Pt(g.x+1, g.y);
+			}
+			break;
+		}
+		break;
+	}
+	if(moved)
+		drawboard(Pt(g.x, g.y));
+
+	drawglenda();
+}
+

sys/src/games/sokoban/sokoban.c

@@ -0,0 +1,294 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+
+#include "sokoban.h"
+
+char *LEasy = "/sys/games/lib/sokoban/levels/easy.slc";
+char *LHard = "levels/hard.slc";
+char *levelfile;
+
+char		*GRImage = "/sys/games/lib/sokoban/images/right.bit";
+char		*GLImage = "/sys/games/lib/sokoban/images/left.bit";
+char		*WallImage = "/sys/games/lib/sokoban/images/wall.bit";
+char		*EmptyImage = "/sys/games/lib/sokoban/images/empty.bit";
+char		*CargoImage = "/sys/games/lib/sokoban/images/cargo.bit";
+char		*GoalCargoImage = "/sys/games/lib/sokoban/images/goalcargo.bit";
+char		*GoalImage = "/sys/games/lib/sokoban/images/goal.bit";
+char		*WinImage = "/sys/games/lib/sokoban/images/win.bit";
+
+
+char *buttons[] = 
+{
+	"restart",
+	"easy",
+	"hard",
+	"exit",
+	0
+};
+
+Menu menu = 
+{
+	buttons
+};
+
+Menu lmenu =
+{
+	nil,
+	genlevels,
+	0,
+};
+
+Image *
+eallocimage(Rectangle r, int repl, uint color)
+{
+	Image *tmp;
+
+	tmp = allocimage(display, r, screen->chan, repl, color);
+	if(tmp == nil)
+		sysfatal("cannot allocate buffer image: %r");
+
+	return tmp;
+}
+
+Image *
+eloadfile(char *path)
+{
+	Image *img;
+	int fd;
+
+	fd = open(path, OREAD);
+	if(fd < 0) {
+		fprint(2, "cannot open image file %s: %r\n", path);
+		exits("image");
+	}
+	img = readimage(display, fd, 0);
+	if(img == nil)
+		sysfatal("cannot load image: %r");
+	close(fd);
+	
+	return img;
+}
+
+
+void
+allocimages(void)
+{
+	Rectangle one = Rect(0, 0, 1, 1);
+	
+	bg		= eallocimage(one, 1, DDarkyellow);
+	text 		= eallocimage(one, 1, DBluegreen);
+
+	gright = eloadfile(GRImage);
+	gleft = eloadfile(GLImage);
+	wall = eloadfile(WallImage);
+	empty = eloadfile(EmptyImage);
+	empty->repl = 1;
+	goalcargo = eloadfile(GoalCargoImage);
+	cargo = eloadfile(CargoImage);
+	goal = eloadfile(GoalImage);
+	win = eloadfile(WinImage);
+}
+
+int
+key2move(int key)
+{
+	int k = 0;
+
+	switch(key) {
+	case 61454:
+		k = Up;
+		break;
+	case 63488:
+		k = Down;
+		break;
+	case 61457:
+		k = Left;
+		break;
+	case 61458:
+		k = Right;
+		break;
+	}
+
+	return k;
+}
+int
+mousemove(Mouse m)
+{
+	Point p;
+
+	p = subpt(m.xy, screen->r.min);
+	p.x /= BoardX;
+	p.y /= BoardY;
+
+	if(eqpt(p, addpt(level.glenda, Pt(0, -1))))
+		return Up;
+	if(eqpt(p, addpt(level.glenda, Pt(0, 1))))
+		return Down;
+	if(eqpt(p, addpt(level.glenda, Pt(-1, 0))))
+		return Left;
+	if(eqpt(p, addpt(level.glenda, Pt(1, 0))))
+		return Right;
+}
+
+char *
+genlevels(int i)
+{
+	
+	if(i >= numlevels)
+		return 0;
+
+	return smprint("level %d", i+1);
+}
+
+
+int
+finished(void)
+{
+	int x, y;
+	for(x = 0; x < MazeX; x++)
+		for(y = 0; y < MazeY; y++)
+			if(level.board[x][y] == Goal)
+				return 0;
+
+	return 1;
+}
+
+void
+eresized(int new)
+{
+	Point p;
+
+	if(new && getwindow(display, Refnone) < 0)
+		sysfatal("can't reattach to window");
+	
+	p = Pt(Dx(screen->r), Dy(screen->r));
+
+	if(!new || !eqpt(p, boardsize(level.max))) {
+		drawlevel();
+	}
+	drawscreen();
+}
+
+void 
+main(int argc, char **argv)
+{
+	Mouse m;
+	Event e;
+
+	if(argc == 2) 
+		levelfile = argv[1];
+	else
+		levelfile = LEasy;
+		
+	if(! loadlevels(levelfile)) {
+		fprint(2, "usage: %s [levelfile]\n", argv[0]);
+		exits("usage");
+	}
+
+	if(initdraw(nil, nil, "sokoban") < 0)
+		sysfatal("initdraw failed: %r");
+	einit(Emouse|Ekeyboard);
+
+	allocimages();
+	glenda = gright;
+	eresized(0);
+
+	for(;;) {
+		switch(event(&e)) {
+		case Emouse:
+			m = e.mouse;
+			if(m.buttons&1) {
+				move(mousemove(m));
+				drawscreen();
+			}
+			if(m.buttons&2) {
+				int l;
+				/* levels start from 1 */
+				lmenu.lasthit = level.index;
+				l=emenuhit(2, &m, &lmenu);
+				if(l>=0){
+					level = levels[l];
+					drawlevel();
+					drawscreen();
+				}
+			}
+			if(m.buttons&4)
+				switch(emenuhit(3, &m, &menu)) {
+				case 0:
+					level = levels[level.index];
+					drawlevel();
+					drawscreen();
+					break;
+				case 1:
+					loadlevels(LEasy);
+					drawlevel();
+					drawscreen();
+					break;
+				case 2:
+					loadlevels(LHard);
+					drawlevel();
+					drawscreen();
+					break;
+				case 3:
+					exits(nil);
+				}
+			break;
+
+		case Ekeyboard:
+			if(level.done)
+				break;
+
+			switch(e.kbdc) {
+			case 127:
+			case 'q':
+			case 'Q':
+				exits(nil);
+			case 'n':
+			case 'N':
+				if(level.index < numlevels - 1) {
+					level = levels[++level.index];
+					drawlevel();
+					drawscreen();
+				}
+				break;
+			case 'p':
+			case 'P':
+				if(level.index > 0) {
+					level = levels[--level.index];
+					drawlevel();
+					drawscreen();
+				}
+				break;
+			case 'r':
+			case 'R':
+				level = levels[level.index];
+				drawlevel();
+				drawscreen();
+				break;
+			case 61454:
+			case 63488:
+			case 61457:
+			case 61458:
+			case ' ':
+				move(key2move(e.kbdc));
+				drawscreen();
+				break;
+			}
+			break;
+		}
+
+		if(finished()) {
+			level.done = 1;
+			drawwin();
+			drawscreen();
+			sleep(3000);
+			if(level.index < numlevels - 1) {
+				level = levels[++level.index];
+				drawlevel();
+				drawscreen();
+			}
+		}
+	}
+}

sys/src/games/sokoban/sokoban.h

@@ -0,0 +1,79 @@
+enum {
+	/* levels */
+	Empty		= 0,
+	Background,
+	Wall, 
+	Cargo,
+	Goal,
+	GoalCargo,
+	Glenda,
+
+	/* movements */
+	Up,
+	Down,
+	Left,
+	Right,
+};
+
+enum {
+	/* glenda faces the horizontal direction she's moving in */
+	GLeft	= 0,
+	GRight 	= 1,
+};
+
+enum {
+	MazeX = 20,
+	MazeY = 18,
+	BoardX = 49,
+	BoardY = 49,
+	SizeX = MazeX*BoardX+10,	
+	SizeY = MazeY*BoardY+10,
+
+	Maxlevels = 200,
+};
+
+typedef struct {
+	Point 	glenda;
+	Point 	max;		/* that's how much the board spans */
+	uint 	index;
+	uint	done;
+	uint 	board[MazeX][MazeY];
+} Level;
+
+Level level;		/* the current level */
+Level levels[Maxlevels];	/* all levels from this file */
+int numlevels;		/* how many levels do we have */
+
+Image *img;		/* buffer */
+Image *text;		/* for text messages */
+Image *win;
+
+Image *goal;
+Image *cargo;
+Image *goalcargo;
+Image *wall;
+Image *empty;
+Image *gleft;
+Image *gright;
+Image *glenda;
+Image *bg;
+
+/* graphics.c */
+void drawscreen(void);
+void drawlevel(void);
+void drawwin(void);
+void drawglenda(void);
+void drawboard(Point);
+void resize(Point);
+Point boardsize(Point);
+
+
+/* level.c */
+int loadlevels(char *);
+
+/* move.c */
+void move(int);
+
+/* sokoban.c */
+char *genlevels(int);
+Image *eallocimage(Rectangle, int, uint);