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<pre id='vimCodeElement'>
<span class="Comment"># Chessboard program: you type in moves in algebraic notation, and it'll</span>
<span class="Comment"># display the position after each move.</span>
<span class="Comment"># recipes are mu's names for functions</span>
<span class="muRecipe">recipe</span> main [
open-console <span class="Comment"># take control of screen, keyboard and mouse</span>
<span class="Comment"># The chessboard recipe takes keyboard and screen objects as 'ingredients'.</span>
<span class="Constant"> #</span>
<span class="Comment"># In mu it is good form (though not required) to explicitly show the</span>
<span class="Comment"># hardware you rely on.</span>
<span class="Constant"> #</span>
<span class="Comment"># The chessboard also returns the same keyboard and screen objects. In mu it</span>
<span class="Comment"># is good form to not modify ingredients of a recipe unless they are also</span>
<span class="Comment"># results. Here we clearly modify both keyboard and screen, so we return</span>
<span class="Comment"># both.</span>
<span class="Constant"> #</span>
<span class="Comment"># Here the console and screen are both 0, which usually indicates real</span>
<span class="Comment"># hardware rather than a fake for testing as you'll see below.</span>
<span class="Constant">0:literal/screen</span>, <span class="Constant">0:literal/console</span><span class="Special"> <- </span>chessboard <span class="Constant">0:literal/screen</span>, <span class="Constant">0:literal/console</span>
close-console <span class="Comment"># cleanup screen, keyboard and mouse</span>
]
<span class="SalientComment">## But enough about mu. Here's what it looks like to run the chessboard program.</span>
<span class="muScenario">scenario</span> print-board-and-read-move [
$close-trace <span class="Comment"># administrivia: most scenarios save and check traces, but this one gets too large/slow</span>
<span class="Comment"># we'll make the screen really wide because the program currently prints out a long line</span>
assume-screen <span class="Constant">120:literal/width</span>, <span class="Constant">20:literal/height</span>
<span class="Comment"># initialize keyboard to type in a move</span>
assume-console [
type <span class="Constant">[a2-a4</span>
<span class="Constant">]</span>
]
run [
screen:address, console:address<span class="Special"> <- </span>chessboard screen:address, console:address
<span class="CommentedCode">#? $browse-trace #? 1</span>
<span class="CommentedCode">#? $close-trace #? 1</span>
<span class="Comment"># icon for the cursor</span>
screen:address<span class="Special"> <- </span>print-character screen:address, <span class="Constant">9251:literal</span> <span class="Comment"># '␣'</span>
]
screen-should-contain [
<span class="Comment"># 1 2 3 4 5 6 7 8 9 10 11</span>
<span class="Comment"># 012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789</span>
<span class="Constant"> .Stupid text-mode chessboard. White pieces in uppercase; black pieces in lowercase. No checking for legal moves. .</span>
<span class="Constant"> . .</span>
<span class="Constant"> .8 | r n b q k b n r .</span>
<span class="Constant"> .7 | p p p p p p p p .</span>
<span class="Constant"> .6 | .</span>
<span class="Constant"> .5 | .</span>
<span class="Constant"> .4 | P .</span>
<span class="Constant"> .3 | .</span>
<span class="Constant"> .2 | P P P P P P P .</span>
<span class="Constant"> .1 | R N B Q K B N R .</span>
<span class="Constant"> . +---------------- .</span>
<span class="Constant"> . a b c d e f g h .</span>
<span class="Constant"> . .</span>
<span class="Constant"> .Type in your move as <from square>-<to square>. For example: 'a2-a4'. Then press <enter>. .</span>
<span class="Constant"> . .</span>
<span class="Constant"> .Hit 'q' to exit. .</span>
<span class="Constant"> . .</span>
<span class="Constant"> .move: ␣ .</span>
<span class="Constant"> . .</span>
<span class="Constant"> . .</span>
]
]
<span class="CommentedCode">#? scenario foo [ #? 1</span>
<span class="CommentedCode">#? $print [aaa] #? 1</span>
<span class="CommentedCode">#? run [ #? 1</span>
<span class="CommentedCode">#? 1:number <- copy 34:literal #? 1</span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="CommentedCode">#? memory-should-contain [ #? 1</span>
<span class="CommentedCode">#? 1 <- 34 #? 1</span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="CommentedCode">#? $print [zzz] #? 1</span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="SalientComment">## Here's how 'chessboard' is implemented.</span>
<span class="muRecipe">recipe</span> chessboard [
<span class="CommentedCode">#? $start-tracing [schedule] #? 2</span>
<span class="CommentedCode">#? $start-tracing #? 1</span>
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
console:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="CommentedCode">#? $print [screen: ], screen:address, [, console: ], console:address, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
board:address:array:address:array:character<span class="Special"> <- </span>initial-position
<span class="Comment"># hook up stdin</span>
stdin:address:channel<span class="Special"> <- </span>new-channel <span class="Constant">10:literal/capacity</span>
start-running send-keys-to-channel:<span class="muRecipe">recipe</span>, console:address, stdin:address:channel, screen:address
<span class="Comment"># buffer lines in stdin</span>
buffered-stdin:address:channel<span class="Special"> <- </span>new-channel <span class="Constant">10:literal/capacity</span>
start-running buffer-lines:<span class="muRecipe">recipe</span>, stdin:address:channel, buffered-stdin:address:channel
<span class="Delimiter">{</span>
msg:address:array:character<span class="Special"> <- </span>new <span class="Constant">[Stupid text-mode chessboard. White pieces in uppercase; black pieces in lowercase. No checking for legal moves.</span>
<span class="Constant">]</span>
print-string screen:address, msg:address:array:character
<span class="CommentedCode">#? $print [aaa</span>
<span class="CommentedCode">#? ] #? 1</span>
cursor-to-next-line screen:address
print-board screen:address, board:address:array:address:array:character
cursor-to-next-line screen:address
msg:address:array:character<span class="Special"> <- </span>new <span class="Constant">[Type in your move as <from square>-<to square>. For example: 'a2-a4'. Then press <enter>.</span>
<span class="Constant">]</span>
print-string screen:address, msg:address:array:character
<span class="CommentedCode">#? $print [bbb</span>
<span class="CommentedCode">#? ] #? 1</span>
cursor-to-next-line screen:address
msg:address:array:character<span class="Special"> <- </span>new <span class="Constant">[Hit 'q' to exit.</span>
<span class="Constant">]</span>
print-string screen:address, msg:address:array:character
<span class="CommentedCode">#? $print [ccc</span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="Delimiter">{</span>
cursor-to-next-line screen:address
msg:address:array:character<span class="Special"> <- </span>new <span class="Constant">[move: ]</span>
print-string screen:address, msg:address:array:character
<span class="CommentedCode">#? $print [ddd</span>
<span class="CommentedCode">#? ] #? 1</span>
m:address:move, quit:boolean, error:boolean<span class="Special"> <- </span>read-move buffered-stdin:address:channel, screen:address
<span class="CommentedCode">#? $print [eee</span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="muControl">break-if</span> quit:boolean, +quit:offset
buffered-stdin:address:channel<span class="Special"> <- </span>clear-channel buffered-stdin:address:channel <span class="Comment"># cleanup after error. todo: test this?</span>
<span class="muControl">loop-if</span> error:boolean
<span class="Delimiter">}</span>
board:address:array:address:array:character<span class="Special"> <- </span>make-move board:address:array:address:array:character, m:address:move
clear-screen screen:address
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
<span class="Constant"> +quit</span>
<span class="CommentedCode">#? $print [aaa] #? 1</span>
]
<span class="SalientComment">## a board is an array of files, a file is an array of characters (squares)</span>
<span class="muRecipe">recipe</span> new-board [
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
initial-position:address:array:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="Comment"># assert(length(initial-position) == 64)</span>
len:number<span class="Special"> <- </span>length initial-position:address:array:number/deref
correct-length?:boolean<span class="Special"> <- </span>equal len:number, <span class="Constant">64:literal</span>
assert correct-length?:boolean, <span class="Constant">[chessboard had incorrect size]</span>
<span class="Comment"># board is an array of pointers to files; file is an array of characters</span>
board:address:array:address:array:character<span class="Special"> <- </span>new location:type, <span class="Constant">8:literal</span>
col:number<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>equal col:number, <span class="Constant">8:literal</span>
<span class="muControl">break-if</span> done?:boolean
file:address:address:array:character<span class="Special"> <- </span>index-address board:address:array:address:array:character/deref, col:number
file:address:address:array:character/deref<span class="Special"> <- </span>new-file initial-position:address:array:number, col:number
col:number<span class="Special"> <- </span>add col:number, <span class="Constant">1:literal</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> board:address:array:address:array:character
]
<span class="muRecipe">recipe</span> new-file [
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
position:address:array:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
index:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
index:number<span class="Special"> <- </span>multiply index:number, <span class="Constant">8:literal</span>
result:address:array:character<span class="Special"> <- </span>new character:type, <span class="Constant">8:literal</span>
row:number<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>equal row:number, <span class="Constant">8:literal</span>
<span class="muControl">break-if</span> done?:boolean
dest:address:character<span class="Special"> <- </span>index-address result:address:array:character/deref, row:number
dest:address:character/deref<span class="Special"> <- </span>index position:address:array:number/deref, index:number
row:number<span class="Special"> <- </span>add row:number, <span class="Constant">1:literal</span>
index:number<span class="Special"> <- </span>add index:number, <span class="Constant">1:literal</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> result:address:array:character
]
<span class="muRecipe">recipe</span> print-board [
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
board:address:array:address:array:character<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
row:number<span class="Special"> <- </span>copy <span class="Constant">7:literal</span> <span class="Comment"># start printing from the top of the board</span>
<span class="Comment"># print each row</span>
<span class="CommentedCode">#? $print [printing board to screen ], screen:address, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>lesser-than row:number, <span class="Constant">0:literal</span>
<span class="muControl">break-if</span> done?:boolean
<span class="CommentedCode">#? $print [printing rank ], row:number, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="Comment"># print rank number as a legend</span>
rank:number<span class="Special"> <- </span>add row:number, <span class="Constant">1:literal</span>
print-integer screen:address, rank:number
s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[ | ]</span>
print-string screen:address, s:address:array:character
<span class="Comment"># print each square in the row</span>
col:number<span class="Special"> <- </span>copy <span class="Constant">0:literal</span>
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>equal col:number, <span class="Constant">8:literal</span>
<span class="muControl">break-if</span> done?:boolean
f:address:array:character<span class="Special"> <- </span>index board:address:array:address:array:character/deref, col:number
c:character<span class="Special"> <- </span>index f:address:array:character/deref, row:number
print-character screen:address, c:character
print-character screen:address, <span class="Constant">32:literal</span> <span class="Comment"># ' '</span>
col:number<span class="Special"> <- </span>add col:number, <span class="Constant">1:literal</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
row:number<span class="Special"> <- </span>subtract row:number, <span class="Constant">1:literal</span>
cursor-to-next-line screen:address
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
<span class="Comment"># print file letters as legend</span>
<span class="CommentedCode">#? $print [printing legend</span>
<span class="CommentedCode">#? ] #? 1</span>
s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[ +----------------]</span>
print-string screen:address, s:address:array:character
screen:address<span class="Special"> <- </span>cursor-to-next-line screen:address
<span class="CommentedCode">#? screen:address <- print-character screen:address, 97:literal #? 1</span>
s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[ a b c d e f g h]</span>
screen:address<span class="Special"> <- </span>print-string screen:address, s:address:array:character
screen:address<span class="Special"> <- </span>cursor-to-next-line screen:address
<span class="CommentedCode">#? $print [done printing board</span>
<span class="CommentedCode">#? ] #? 1</span>
]
<span class="Comment"># board:address:array:address:array:character <- initial-position</span>
<span class="muRecipe">recipe</span> initial-position [
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
<span class="Comment"># layout in memory (in raster order):</span>
<span class="Comment"># R P _ _ _ _ p r</span>
<span class="Comment"># N P _ _ _ _ p n</span>
<span class="Comment"># B P _ _ _ _ p b</span>
<span class="Comment"># Q P _ _ _ _ p q</span>
<span class="Comment"># K P _ _ _ _ p k</span>
<span class="Comment"># B P _ _ _ _ p B</span>
<span class="Comment"># N P _ _ _ _ p n</span>
<span class="Comment"># R P _ _ _ _ p r</span>
initial-position:address:array:number<span class="Special"> <- </span>new-array <span class="Constant">82:literal/R</span>, <span class="Constant">80:literal/P</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">112:literal/p</span>, <span class="Constant">114:literal/r</span>, <span class="Constant">78:literal/N</span>, <span class="Constant">80:literal/P</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">112:literal/p</span>, <span class="Constant">110:literal/n</span>, <span class="Constant">66:literal/B</span>, <span class="Constant">80:literal/P</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">112:literal/p</span>, <span class="Constant">98:literal/b</span>, <span class="Constant">81:literal/Q</span>, <span class="Constant">80:literal/P</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">112:literal/p</span>, <span class="Constant">113:literal/q</span>, <span class="Constant">75:literal/K</span>, <span class="Constant">80:literal/P</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">112:literal/p</span>, <span class="Constant">107:literal/k</span>, <span class="Constant">66:literal/B</span>, <span class="Constant">80:literal/P</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">112:literal/p</span>, <span class="Constant">98:literal/b</span>, <span class="Constant">78:literal/N</span>, <span class="Constant">80:literal/P</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">112:literal/p</span>, <span class="Constant">110:literal/n</span>, <span class="Constant">82:literal/R</span>, <span class="Constant">80:literal/P</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">32:literal/blank</span>, <span class="Constant">112:literal/p</span>, <span class="Constant">114:literal/r</span>
<span class="CommentedCode">#? 82:literal/R, 80:literal/P, 32:literal/blank, 32:literal/blank, 32:literal/blank, 32:literal/blank, 112:literal/p, 114:literal/r,</span>
<span class="CommentedCode">#? 78:literal/N, 80:literal/P, 32:literal/blank, 32:literal/blank, 32:literal/blank, 32:literal/blank, 112:literal/p, 110:literal/n,</span>
<span class="CommentedCode">#? 66:literal/B, 80:literal/P, 32:literal/blank, 32:literal/blank, 32:literal/blank, 32:literal/blank, 112:literal/p, 98:literal/b, </span>
<span class="CommentedCode">#? 81:literal/Q, 80:literal/P, 32:literal/blank, 32:literal/blank, 32:literal/blank, 32:literal/blank, 112:literal/p, 113:literal/q,</span>
<span class="CommentedCode">#? 75:literal/K, 80:literal/P, 32:literal/blank, 32:literal/blank, 32:literal/blank, 32:literal/blank, 112:literal/p, 107:literal/k,</span>
<span class="CommentedCode">#? 66:literal/B, 80:literal/P, 32:literal/blank, 32:literal/blank, 32:literal/blank, 32:literal/blank, 112:literal/p, 98:literal/b,</span>
<span class="CommentedCode">#? 78:literal/N, 80:literal/P, 32:literal/blank, 32:literal/blank, 32:literal/blank, 32:literal/blank, 112:literal/p, 110:literal/n,</span>
<span class="CommentedCode">#? 82:literal/R, 80:literal/P, 32:literal/blank, 32:literal/blank, 32:literal/blank, 32:literal/blank, 112:literal/p, 114:literal/r</span>
board:address:array:address:array:character<span class="Special"> <- </span>new-board initial-position:address:array:number
<span class="muControl">reply</span> board:address:array:address:array:character
]
<span class="muScenario">scenario</span> printing-the-board [
assume-screen <span class="Constant">30:literal/width</span>, <span class="Constant">12:literal/height</span>
run [
1:address:array:address:array:character/board<span class="Special"> <- </span>initial-position
screen:address<span class="Special"> <- </span>print-board screen:address, 1:address:array:address:array:character/board
<span class="CommentedCode">#? $dump-screen #? 1</span>
]
screen-should-contain [
<span class="Comment"># 012345678901234567890123456789</span>
<span class="Constant"> .8 | r n b q k b n r .</span>
<span class="Constant"> .7 | p p p p p p p p .</span>
<span class="Constant"> .6 | .</span>
<span class="Constant"> .5 | .</span>
<span class="Constant"> .4 | .</span>
<span class="Constant"> .3 | .</span>
<span class="Constant"> .2 | P P P P P P P P .</span>
<span class="Constant"> .1 | R N B Q K B N R .</span>
<span class="Constant"> . +---------------- .</span>
<span class="Constant"> . a b c d e f g h .</span>
<span class="Constant"> . .</span>
<span class="Constant"> . .</span>
]
]
<span class="SalientComment">## data structure: move</span>
container move [
<span class="Comment"># valid range: 0-7</span>
from-file:number
from-rank:number
to-file:number
to-rank:number
]
<span class="Comment"># result:address:move, quit?:boolean, error?:boolean <- read-move stdin:address:channel, screen:address</span>
<span class="Comment"># prints only error messages to screen</span>
<span class="muRecipe">recipe</span> read-move [
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
stdin:address:channel<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
<span class="CommentedCode">#? $print screen:address #? 1</span>
from-file:number, quit?:boolean, error?:boolean<span class="Special"> <- </span>read-file stdin:address:channel, screen:address
<span class="muControl">reply-if</span> quit?:boolean, <span class="Constant">0:literal/dummy</span>, quit?:boolean, error?:boolean
<span class="muControl">reply-if</span> error?:boolean, <span class="Constant">0:literal/dummy</span>, quit?:boolean, error?:boolean
<span class="CommentedCode">#? close-console #? 1</span>
<span class="Comment"># construct the move object</span>
result:address:move<span class="Special"> <- </span>new move:type
x:address:number<span class="Special"> <- </span>get-address result:address:move/deref, from-file:offset
x:address:number/deref<span class="Special"> <- </span>copy from-file:number
x:address:number<span class="Special"> <- </span>get-address result:address:move/deref, from-rank:offset
x:address:number/deref, quit?:boolean, error?:boolean<span class="Special"> <- </span>read-rank stdin:address:channel, screen:address
<span class="muControl">reply-if</span> quit?:boolean, <span class="Constant">0:literal/dummy</span>, quit?:boolean, error?:boolean
<span class="muControl">reply-if</span> error?:boolean, <span class="Constant">0:literal/dummy</span>, quit?:boolean, error?:boolean
error?:boolean<span class="Special"> <- </span>expect-from-channel stdin:address:channel, <span class="Constant">45:literal/dash</span>, screen:address
<span class="muControl">reply-if</span> error?:boolean, <span class="Constant">0:literal/dummy</span>, <span class="Constant">0:literal/quit</span>, error?:boolean
x:address:number<span class="Special"> <- </span>get-address result:address:move/deref, to-file:offset
x:address:number/deref, quit?:boolean, error?:boolean<span class="Special"> <- </span>read-file stdin:address:channel, screen:address
<span class="muControl">reply-if</span> quit?:boolean, <span class="Constant">0:literal/dummy</span>, quit?:boolean, error?:boolean
<span class="muControl">reply-if</span> error?:boolean, <span class="Constant">0:literal/dummy</span>, quit?:boolean, error?:boolean
x:address:number<span class="Special"> <- </span>get-address result:address:move/deref, to-rank:offset
x:address:number/deref, quit?:boolean, error?:boolean<span class="Special"> <- </span>read-rank stdin:address:channel, screen:address
<span class="muControl">reply-if</span> quit?:boolean, <span class="Constant">0:literal/dummy</span>, quit?:boolean, error?:boolean
<span class="muControl">reply-if</span> error?:boolean, <span class="Constant">0:literal/dummy</span>, quit?:boolean, error?:boolean
<span class="CommentedCode">#? $exit #? 1</span>
error?:boolean<span class="Special"> <- </span>expect-from-channel stdin:address:channel, <span class="Constant">10:literal/newline</span>, screen:address
<span class="muControl">reply-if</span> error?:boolean, <span class="Constant">0:literal/dummy</span>, <span class="Constant">0:literal/quit</span>, error?:boolean
<span class="muControl">reply</span> result:address:move, quit?:boolean, error?:boolean
]
<span class="Comment"># file:number, quit:boolean, error:boolean <- read-file stdin:address:channel, screen:address</span>
<span class="Comment"># valid values for file: 0-7</span>
<span class="muRecipe">recipe</span> read-file [
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
stdin:address:channel<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
c:character, stdin:address:channel<span class="Special"> <- </span>read stdin:address:channel
<span class="Delimiter">{</span>
q-pressed?:boolean<span class="Special"> <- </span>equal c:character, <span class="Constant">81:literal</span> <span class="Comment"># 'Q'</span>
<span class="muControl">break-unless</span> q-pressed?:boolean
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">1:literal/quit</span>, <span class="Constant">0:literal/error</span>
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
q-pressed?:boolean<span class="Special"> <- </span>equal c:character, <span class="Constant">113:literal</span> <span class="Comment"># 'q'</span>
<span class="muControl">break-unless</span> q-pressed?:boolean
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">1:literal/quit</span>, <span class="Constant">0:literal/error</span>
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
empty-fake-keyboard?:boolean<span class="Special"> <- </span>equal c:character, <span class="Constant">0:literal/eof</span>
<span class="muControl">break-unless</span> empty-fake-keyboard?:boolean
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">1:literal/quit</span>, <span class="Constant">0:literal/error</span>
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
newline?:boolean<span class="Special"> <- </span>equal c:character, <span class="Constant">10:literal/newline</span>
<span class="muControl">break-unless</span> newline?:boolean
error-message:address:array:character<span class="Special"> <- </span>new <span class="Constant">[that's not enough]</span>
print-string screen:address, error-message:address:array:character
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">0:literal/quit</span>, <span class="Constant">1:literal/error</span>
<span class="Delimiter">}</span>
file:number<span class="Special"> <- </span>subtract c:character, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
<span class="CommentedCode">#? $print file:number, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="Comment"># 'a' <= file <= 'h'</span>
<span class="Delimiter">{</span>
above-min:boolean<span class="Special"> <- </span>greater-or-equal file:number, <span class="Constant">0:literal</span>
<span class="muControl">break-if</span> above-min:boolean
error-message:address:array:character<span class="Special"> <- </span>new <span class="Constant">[file too low: ]</span>
print-string screen:address, error-message:address:array:character
print-character screen:address, c:character
cursor-to-next-line screen:address
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">0:literal/quit</span>, <span class="Constant">1:literal/error</span>
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
below-max:boolean<span class="Special"> <- </span>lesser-than file:number, <span class="Constant">8:literal</span>
<span class="muControl">break-if</span> below-max:boolean
error-message:address:array:character<span class="Special"> <- </span>new <span class="Constant">[file too high: ]</span>
print-string screen:address, error-message:address:array:character
print-character screen:address, c:character
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">0:literal/quit</span>, <span class="Constant">1:literal/error</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> file:number, <span class="Constant">0:literal/quit</span>, <span class="Constant">0:literal/error</span>
]
<span class="Comment"># rank:number <- read-rank stdin:address:channel, screen:address</span>
<span class="Comment"># valid values: 0-7, -1 (quit), -2 (error)</span>
<span class="muRecipe">recipe</span> read-rank [
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
stdin:address:channel<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
c:character, stdin:address:channel<span class="Special"> <- </span>read stdin:address:channel
<span class="Delimiter">{</span>
q-pressed?:boolean<span class="Special"> <- </span>equal c:character, <span class="Constant">81:literal</span> <span class="Comment"># 'Q'</span>
<span class="muControl">break-unless</span> q-pressed?:boolean
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">1:literal/quit</span>, <span class="Constant">0:literal/error</span>
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
q-pressed?:boolean<span class="Special"> <- </span>equal c:character, <span class="Constant">113:literal</span> <span class="Comment"># 'q'</span>
<span class="muControl">break-unless</span> q-pressed?:boolean
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">1:literal/quit</span>, <span class="Constant">0:literal/error</span>
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
newline?:boolean<span class="Special"> <- </span>equal c:character, <span class="Constant">10:literal</span> <span class="Comment"># newline</span>
<span class="muControl">break-unless</span> newline?:boolean
error-message:address:array:character<span class="Special"> <- </span>new <span class="Constant">[that's not enough]</span>
print-string screen:address, error-message:address:array:character
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">0:literal/quit</span>, <span class="Constant">1:literal/error</span>
<span class="Delimiter">}</span>
rank:number<span class="Special"> <- </span>subtract c:character, <span class="Constant">49:literal</span> <span class="Comment"># '1'</span>
<span class="CommentedCode">#? $print rank:number, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="Comment"># assert'1' <= rank <= '8'</span>
<span class="Delimiter">{</span>
above-min:boolean<span class="Special"> <- </span>greater-or-equal rank:number, <span class="Constant">0:literal</span>
<span class="muControl">break-if</span> above-min:boolean
error-message:address:array:character<span class="Special"> <- </span>new <span class="Constant">[rank too low: ]</span>
print-string screen:address, error-message:address:array:character
print-character screen:address, c:character
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">0:literal/quit</span>, <span class="Constant">1:literal/error</span>
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
below-max:boolean<span class="Special"> <- </span>lesser-or-equal rank:number, <span class="Constant">7:literal</span>
<span class="muControl">break-if</span> below-max:boolean
error-message:address:array:character<span class="Special"> <- </span>new <span class="Constant">[rank too high: ]</span>
print-string screen:address, error-message:address:array:character
print-character screen:address, c:character
<span class="muControl">reply</span> <span class="Constant">0:literal/dummy</span>, <span class="Constant">0:literal/quit</span>, <span class="Constant">1:literal/error</span>
<span class="Delimiter">}</span>
<span class="muControl">reply</span> rank:number, <span class="Constant">0:literal/quit</span>, <span class="Constant">0:literal/error</span>
]
<span class="Comment"># read a character from the given channel and check that it's what we expect</span>
<span class="Comment"># return true on error</span>
<span class="muRecipe">recipe</span> expect-from-channel [
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
stdin:address:channel<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
expected:character<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
c:character, stdin:address:channel<span class="Special"> <- </span>read stdin:address:channel
match?:boolean<span class="Special"> <- </span>equal c:character, expected:character
<span class="Delimiter">{</span>
<span class="muControl">break-if</span> match?:boolean
s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[expected character not found]</span>
print-string screen:address, s:address:array:character
<span class="Delimiter">}</span>
result:boolean<span class="Special"> <- </span>not match?:boolean
<span class="muControl">reply</span> result:boolean
]
<span class="muScenario">scenario</span> read-move-blocking [
assume-screen <span class="Constant">20:literal/width</span>, <span class="Constant">2:literal/height</span>
run [
<span class="CommentedCode">#? $start-tracing #? 1</span>
1:address:channel<span class="Special"> <- </span>new-channel <span class="Constant">2:literal</span>
<span class="CommentedCode">#? $print [aaa channel address: ], 1:address:channel, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
2:number/routine<span class="Special"> <- </span>start-running read-move:<span class="muRecipe">recipe</span>, 1:address:channel, screen:address
<span class="Comment"># 'read-move' is waiting for input</span>
wait-for-routine 2:number
<span class="CommentedCode">#? $print [bbb channel address: ], 1:address:channel, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
3:number<span class="Special"> <- </span>routine-state 2:number/id
<span class="CommentedCode">#? $print [I: routine ], 2:number, [ state ], 3:number [ </span>
<span class="CommentedCode">#? ] #? 1</span>
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?, [
F read-move-blocking: routine failed to pause <span class="muRecipe">after</span> coming up (<span class="muRecipe">before</span> any keys were pressed)]
<span class="Comment"># press 'a'</span>
<span class="CommentedCode">#? $print [ccc channel address: ], 1:address:channel, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
<span class="CommentedCode">#? $exit #? 1</span>
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
restart 2:number/routine
<span class="Comment"># 'read-move' still waiting for input</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number/id
<span class="CommentedCode">#? $print [II: routine ], 2:number, [ state ], 3:number [ </span>
<span class="CommentedCode">#? ] #? 1</span>
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?, [
F read-move-blocking: routine failed to pause <span class="muRecipe">after</span> rank 'a']
<span class="Comment"># press '2'</span>
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">50:literal</span> <span class="Comment"># '2'</span>
restart 2:number/routine
<span class="Comment"># 'read-move' still waiting for input</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number/id
<span class="CommentedCode">#? $print [III: routine ], 2:number, [ state ], 3:number [ </span>
<span class="CommentedCode">#? ] #? 1</span>
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?, [
F read-move-blocking: routine failed to pause <span class="muRecipe">after</span> file 'a2']
<span class="Comment"># press '-'</span>
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">45:literal</span> <span class="Comment"># '-'</span>
restart 2:number/routine
<span class="Comment"># 'read-move' still waiting for input</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number
<span class="CommentedCode">#? $print [IV: routine ], 2:number, [ state ], 3:number [ </span>
<span class="CommentedCode">#? ] #? 1</span>
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?/routine-state, [
F read-move-blocking: routine failed to pause <span class="muRecipe">after</span> hyphen 'a2-']
<span class="Comment"># press 'a'</span>
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
restart 2:number/routine
<span class="Comment"># 'read-move' still waiting for input</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number
<span class="CommentedCode">#? $print [V: routine ], 2:number, [ state ], 3:number [ </span>
<span class="CommentedCode">#? ] #? 1</span>
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?/routine-state, [
F read-move-blocking: routine failed to pause <span class="muRecipe">after</span> rank 'a2-a']
<span class="Comment"># press '4'</span>
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">52:literal</span> <span class="Comment"># '4'</span>
restart 2:number/routine
<span class="Comment"># 'read-move' still waiting for input</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number
<span class="CommentedCode">#? $print [VI: routine ], 2:number, [ state ], 3:number [ </span>
<span class="CommentedCode">#? ] #? 1</span>
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?, [
F read-move-blocking: routine failed to pause <span class="muRecipe">after</span> file 'a2-a4']
<span class="Comment"># press 'newline'</span>
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">10:literal</span> <span class="Comment"># newline</span>
restart 2:number/routine
<span class="Comment"># 'read-move' now completes</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number
<span class="CommentedCode">#? $print [VII: routine ], 2:number, [ state ], 3:number [ </span>
<span class="CommentedCode">#? ] #? 1</span>
4:boolean/completed?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">1:literal/completed</span>
assert 4:boolean/completed?, [
F read-move-blocking: routine failed to terminate on newline]
trace <span class="Constant">[test]</span>, <span class="Constant">[reached end]</span>
]
trace-should-contain [
test: reached end
]
]
<span class="muScenario">scenario</span> read-move-quit [
assume-screen <span class="Constant">20:literal/width</span>, <span class="Constant">2:literal/height</span>
run [
1:address:channel<span class="Special"> <- </span>new-channel <span class="Constant">2:literal</span>
2:number/routine<span class="Special"> <- </span>start-running read-move:<span class="muRecipe">recipe</span>, 1:address:channel, screen:address
<span class="Comment"># 'read-move' is waiting for input</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number/id
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?, [
F read-move-quit: routine failed to pause <span class="muRecipe">after</span> coming up (<span class="muRecipe">before</span> any keys were pressed)]
<span class="Comment"># press 'q'</span>
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">113:literal</span> <span class="Comment"># 'q'</span>
restart 2:number/routine
<span class="Comment"># 'read-move' completes</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number/id
4:boolean/completed?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">1:literal/completed</span>
assert 4:boolean/completed?, [
F read-move-quit: routine failed to terminate on 'q']
trace <span class="Constant">[test]</span>, <span class="Constant">[reached end]</span>
]
trace-should-contain [
test: reached end
]
]
<span class="muScenario">scenario</span> read-move-illegal-file [
assume-screen <span class="Constant">20:literal/width</span>, <span class="Constant">2:literal/height</span>
run [
1:address:channel<span class="Special"> <- </span>new-channel <span class="Constant">2:literal</span>
2:number/routine<span class="Special"> <- </span>start-running read-move:<span class="muRecipe">recipe</span>, 1:address:channel, screen:address
<span class="Comment"># 'read-move' is waiting for input</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number/id
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?, [
F read-move-file: routine failed to pause <span class="muRecipe">after</span> coming up (<span class="muRecipe">before</span> any keys were pressed)]
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">50:literal</span> <span class="Comment"># '2'</span>
restart 2:number/routine
wait-for-routine 2:number
]
screen-should-contain [
<span class="Constant"> .file too low: 2 .</span>
<span class="Constant"> . .</span>
]
]
<span class="muScenario">scenario</span> read-move-illegal-rank [
assume-screen <span class="Constant">20:literal/width</span>, <span class="Constant">2:literal/height</span>
run [
1:address:channel<span class="Special"> <- </span>new-channel <span class="Constant">2:literal</span>
2:number/routine<span class="Special"> <- </span>start-running read-move:<span class="muRecipe">recipe</span>, 1:address:channel, screen:address
<span class="Comment"># 'read-move' is waiting for input</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number/id
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?, [
F read-move-file: routine failed to pause <span class="muRecipe">after</span> coming up (<span class="muRecipe">before</span> any keys were pressed)]
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
restart 2:number/routine
wait-for-routine 2:number
]
screen-should-contain [
<span class="Constant"> .rank too high: a .</span>
<span class="Constant"> . .</span>
]
]
<span class="muScenario">scenario</span> read-move-empty [
assume-screen <span class="Constant">20:literal/width</span>, <span class="Constant">2:literal/height</span>
run [
1:address:channel<span class="Special"> <- </span>new-channel <span class="Constant">2:literal</span>
2:number/routine<span class="Special"> <- </span>start-running read-move:<span class="muRecipe">recipe</span>, 1:address:channel, screen:address
<span class="Comment"># 'read-move' is waiting for input</span>
wait-for-routine 2:number
3:number<span class="Special"> <- </span>routine-state 2:number/id
4:boolean/waiting?<span class="Special"> <- </span>equal 3:number/routine-state, <span class="Constant">2:literal/waiting</span>
assert 4:boolean/waiting?, [
F read-move-file: routine failed to pause <span class="muRecipe">after</span> coming up (<span class="muRecipe">before</span> any keys were pressed)]
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">10:literal/newline</span>
1:address:channel<span class="Special"> <- </span>write 1:address:channel, <span class="Constant">97:literal</span> <span class="Comment"># 'a'</span>
restart 2:number/routine
wait-for-routine 2:number
]
screen-should-contain [
<span class="Constant"> .that's not enough .</span>
<span class="Constant"> . .</span>
]
]
<span class="muRecipe">recipe</span> make-move [
<span class="Constant">default-space</span>:address:array:location<span class="Special"> <- </span>new location:type, <span class="Constant">30:literal</span>
b:address:array:address:array:character<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
m:address:move<span class="Special"> <- </span><span class="Constant">next-ingredient</span>
from-file:number<span class="Special"> <- </span>get m:address:move/deref, from-file:offset
<span class="CommentedCode">#? $print from-file:number, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
from-rank:number<span class="Special"> <- </span>get m:address:move/deref, from-rank:offset
<span class="CommentedCode">#? $print from-rank:number, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
to-file:number<span class="Special"> <- </span>get m:address:move/deref, to-file:offset
<span class="CommentedCode">#? $print to-file:number, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
to-rank:number<span class="Special"> <- </span>get m:address:move/deref, to-rank:offset
<span class="CommentedCode">#? $print to-rank:number, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
f:address:array:character<span class="Special"> <- </span>index b:address:array:address:array:character/deref, from-file:number
src:address:character/square<span class="Special"> <- </span>index-address f:address:array:character/deref, from-rank:number
f:address:array:character<span class="Special"> <- </span>index b:address:array:address:array:character/deref, to-file:number
dest:address:character/square<span class="Special"> <- </span>index-address f:address:array:character/deref, to-rank:number
<span class="CommentedCode">#? $print src:address:character/deref, [ </span>
<span class="CommentedCode">#? ] #? 1</span>
dest:address:character/deref/square<span class="Special"> <- </span>copy src:address:character/deref/square
src:address:character/deref/square<span class="Special"> <- </span>copy <span class="Constant">32:literal</span> <span class="Comment"># ' '</span>
<span class="muControl">reply</span> b:address:array:address:array:character/same-as-ingredient:0
]
<span class="muScenario">scenario</span> making-a-move [
assume-screen <span class="Constant">30:literal/width</span>, <span class="Constant">12:literal/height</span>
run [
2:address:array:address:array:character/board<span class="Special"> <- </span>initial-position
3:address:move<span class="Special"> <- </span>new move:type
4:address:number<span class="Special"> <- </span>get-address 3:address:move/deref, from-file:offset
4:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">6:literal/g</span>
5:address:number<span class="Special"> <- </span>get-address 3:address:move/deref, from-rank:offset
5:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">1:literal/2</span>
6:address:number<span class="Special"> <- </span>get-address 3:address:move/deref, to-file:offset
6:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">6:literal/g</span>
7:address:number<span class="Special"> <- </span>get-address 3:address:move/deref, to-rank:offset
7:address:number/deref<span class="Special"> <- </span>copy <span class="Constant">3:literal/4</span>
2:address:array:address:array:character/board<span class="Special"> <- </span>make-move 2:address:array:address:array:character/board, 3:address:move
screen:address<span class="Special"> <- </span>print-board screen:address, 2:address:array:address:array:character/board
]
screen-should-contain [
<span class="Comment"># 012345678901234567890123456789</span>
<span class="Constant"> .8 | r n b q k b n r .</span>
<span class="Constant"> .7 | p p p p p p p p .</span>
<span class="Constant"> .6 | .</span>
<span class="Constant"> .5 | .</span>
<span class="Constant"> .4 | P .</span>
<span class="Constant"> .3 | .</span>
<span class="Constant"> .2 | P P P P P P P .</span>
<span class="Constant"> .1 | R N B Q K B N R .</span>
<span class="Constant"> . +---------------- .</span>
<span class="Constant"> . a b c d e f g h .</span>
<span class="Constant"> . .</span>
]
]
</pre>
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