1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - apps/advent2020/2b.mu</title>
<meta name="Generator" content="Vim/8.1">
<meta name="plugin-version" content="vim8.1_v1">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.CommentedCode { color: #8a8a8a; }
.muComment { color: #005faf; }
.LineNr { }
.SpecialChar { color: #d70000; }
.Constant { color: #008787; }
.muFunction { color: #af5f00; text-decoration: underline; }
.Delimiter { color: #c000c0; }
.PreProc { color: #c000c0; }
-->
</style>
<script type='text/javascript'>
<!--
/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
var lineNum;
lineNum = window.location.hash;
lineNum = lineNum.substr(1); /* strip off '#' */
if (lineNum.indexOf('L') == -1) {
lineNum = 'L'+lineNum;
}
var lineElem = document.getElementById(lineNum);
/* Always jump to new location even if the line was hidden inside a fold, or
* we corrected the raw number to a line ID.
*/
if (lineElem) {
lineElem.scrollIntoView(true);
}
return true;
}
if ('onhashchange' in window) {
window.onhashchange = JumpToLine;
}
-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/apps/advent2020/2b.mu'>https://github.com/akkartik/mu/blob/main/apps/advent2020/2b.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># <a href="https://adventofcode.com/2020/day/2">https://adventofcode.com/2020/day/2</a></span>
<span id="L2" class="LineNr"> 2 </span><span class="muComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="muComment"># To run (on Linux):</span>
<span id="L4" class="LineNr"> 4 </span><span class="muComment"># $ git clone <a href="https://github.com/akkartik/mu">https://github.com/akkartik/mu</a></span>
<span id="L5" class="LineNr"> 5 </span><span class="muComment"># $ cd mu</span>
<span id="L6" class="LineNr"> 6 </span><span class="muComment"># $ ./translate_mu apps/advent2020/2b.mu</span>
<span id="L7" class="LineNr"> 7 </span><span class="muComment"># $ ./a.elf < input</span>
<span id="L8" class="LineNr"> 8 </span><span class="muComment">#</span>
<span id="L9" class="LineNr"> 9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
<span id="L10" class="LineNr"> 10 </span>
<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction">main</span><span class="PreProc"> -> </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
<span id="L12" class="LineNr"> 12 </span> <span class="PreProc">var</span> valid-password-count/<span class="Constant">edi</span>: int <span class="SpecialChar"><-</span> copy <span class="Constant">0</span>
<span id="L13" class="LineNr"> 13 </span> <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x100</span>) <span class="muComment"># 256 bytes</span>
<span id="L14" class="LineNr"> 14 </span> <span class="PreProc">var</span> line/<span class="Constant">edx</span>: (addr stream byte) <span class="SpecialChar"><-</span> address line-storage
<span id="L15" class="LineNr"> 15 </span> <span class="PreProc">var</span> slice-storage: slice
<span id="L16" class="LineNr"> 16 </span> <span class="PreProc">var</span> slice/<span class="Constant">ecx</span>: (addr slice) <span class="SpecialChar"><-</span> address slice-storage
<span id="L17" class="LineNr"> 17 </span> <span class="Delimiter">{</span>
<span id="L18" class="LineNr"> 18 </span> <span class="muComment"># read line from stdin</span>
<span id="L19" class="LineNr"> 19 </span> <a href='../../106stream.subx.html#L17'>clear-stream</a> line
<span id="L20" class="LineNr"> 20 </span> <a href='../../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
<span id="L21" class="LineNr"> 21 </span> <span class="muComment"># if line is empty (not even a newline), quit</span>
<span id="L22" class="LineNr"> 22 </span> <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="SpecialChar"><-</span> <a href='../../309stream.subx.html#L6'>stream-empty?</a> line
<span id="L23" class="LineNr"> 23 </span> compare done?, <span class="Constant">0</span> <span class="muComment"># false</span>
<span id="L24" class="LineNr"> 24 </span> <span class="PreProc">break-if-!=</span>
<span id="L25" class="LineNr"> 25 </span> <a href='../../304screen.subx.html#L147'>print-stream-to-real-screen</a> line
<span id="L26" class="LineNr"> 26 </span> <span class="muComment"># slice = next-token(line, '-')</span>
<span id="L27" class="LineNr"> 27 </span> <a href='../../124next-token.subx.html#L10'>next-token</a> line, <span class="Constant">0x2d</span>, slice
<span id="L28" class="LineNr"> 28 </span> <span class="muComment"># pos1 = parse-int(slice)</span>
<span id="L29" class="LineNr"> 29 </span> <span class="PreProc">var</span> _pos1/<span class="Constant">eax</span>: int <span class="SpecialChar"><-</span> <a href='../../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
<span id="L30" class="LineNr"> 30 </span> <span class="PreProc">var</span> pos1/<span class="Constant">ebx</span>: int <span class="SpecialChar"><-</span> copy _pos1
<span id="L31" class="LineNr"> 31 </span> <span class="PreProc">var</span> dash/<span class="Constant">eax</span>: byte <span class="SpecialChar"><-</span> <a href='../../112read-byte.subx.html#L273'>read-byte</a> line <span class="muComment"># skip '-'</span>
<span id="L32" class="LineNr"> 32 </span> <span class="muComment"># slice = next-token(line, ' ')</span>
<span id="L33" class="LineNr"> 33 </span> <a href='../../124next-token.subx.html#L10'>next-token</a> line, <span class="Constant">0x20</span>, slice
<span id="L34" class="LineNr"> 34 </span> <span class="PreProc">var</span> _pos2/<span class="Constant">eax</span>: int <span class="SpecialChar"><-</span> <a href='../../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
<span id="L35" class="LineNr"> 35 </span> <span class="PreProc">var</span> pos2/<span class="Constant">esi</span>: int <span class="SpecialChar"><-</span> copy _pos2
<span id="L36" class="LineNr"> 36 </span> <a href='../../405screen.mu.html#L480'>print-int32-decimal</a> <span class="Constant">0</span>, pos1
<span id="L37" class="LineNr"> 37 </span> <a href='../../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">" "</span>
<span id="L38" class="LineNr"> 38 </span> <a href='../../405screen.mu.html#L480'>print-int32-decimal</a> <span class="Constant">0</span>, pos2
<span id="L39" class="LineNr"> 39 </span> <a href='../../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">"\n"</span>
<span id="L40" class="LineNr"> 40 </span> compare pos1, pos2
<span id="L41" class="LineNr"> 41 </span> <span class="Delimiter">{</span>
<span id="L42" class="LineNr"> 42 </span> <span class="PreProc">break-if-<=</span>
<span id="L43" class="LineNr"> 43 </span> <a href='../../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">"out of order!\n"</span>
<span id="L44" class="LineNr"> 44 </span> <span class="PreProc">return</span> <span class="Constant">1</span>
<span id="L45" class="LineNr"> 45 </span> <span class="Delimiter">}</span>
<span id="L46" class="LineNr"> 46 </span> <span class="muComment"># letter = next non-space</span>
<span id="L47" class="LineNr"> 47 </span> <a href='../../124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> line
<span id="L48" class="LineNr"> 48 </span> <span class="PreProc">var</span> letter/<span class="Constant">eax</span>: byte <span class="SpecialChar"><-</span> <a href='../../112read-byte.subx.html#L273'>read-byte</a> line
<span id="L49" class="LineNr"> 49 </span> <span class="muComment"># skip some stuff</span>
<span id="L50" class="LineNr"> 50 </span> <span class="Delimiter">{</span>
<span id="L51" class="LineNr"> 51 </span> <span class="PreProc">var</span> colon/<span class="Constant">eax</span>: byte <span class="SpecialChar"><-</span> <a href='../../112read-byte.subx.html#L273'>read-byte</a> line <span class="muComment"># skip ':'</span>
<span id="L52" class="LineNr"> 52 </span> <span class="Delimiter">}</span>
<span id="L53" class="LineNr"> 53 </span> <a href='../../124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> line
<span id="L54" class="LineNr"> 54 </span> <span class="muComment"># now check the rest of the line</span>
<span id="L55" class="LineNr"> 55 </span> <span class="PreProc">var</span> is-valid?/<span class="Constant">eax</span>: boolean <span class="SpecialChar"><-</span> is-valid? pos1, pos2, letter, line
<span id="L56" class="LineNr"> 56 </span> compare is-valid?, <span class="Constant">0</span> <span class="muComment"># false</span>
<span id="L57" class="LineNr"> 57 </span> <span class="Delimiter">{</span>
<span id="L58" class="LineNr"> 58 </span> <span class="PreProc">break-if-=</span>
<span id="L59" class="LineNr"> 59 </span> <a href='../../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">"valid!\n"</span>
<span id="L60" class="LineNr"> 60 </span> valid-password-count <span class="SpecialChar"><-</span> increment
<span id="L61" class="LineNr"> 61 </span> <span class="Delimiter">}</span>
<span id="L62" class="LineNr"> 62 </span> <span class="PreProc">loop</span>
<span id="L63" class="LineNr"> 63 </span> <span class="Delimiter">}</span>
<span id="L64" class="LineNr"> 64 </span> <a href='../../405screen.mu.html#L480'>print-int32-decimal</a> <span class="Constant">0</span>, valid-password-count
<span id="L65" class="LineNr"> 65 </span> <a href='../../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">"\n"</span>
<span id="L66" class="LineNr"> 66 </span> <span class="PreProc">return</span> <span class="Constant">0</span>
<span id="L67" class="LineNr"> 67 </span><span class="Delimiter">}</span>
<span id="L68" class="LineNr"> 68 </span>
<span id="L69" class="LineNr"> 69 </span><span class="muComment"># ideally password would be a random-access array</span>
<span id="L70" class="LineNr"> 70 </span><span class="muComment"># we'll just track an index</span>
<span id="L71" class="LineNr"> 71 </span><span class="muComment"># one benefit: we can easily start at 1</span>
<span id="L72" class="LineNr"> 72 </span><span class="PreProc">fn</span> <span class="muFunction">is-valid?</span> pos1: int, pos2: int, letter: byte, password: (addr stream byte)<span class="PreProc"> -> </span>_/<span class="Constant">eax</span>: boolean <span class="Delimiter">{</span>
<span id="L73" class="LineNr"> 73 </span> <span class="PreProc">var</span> i/<span class="Constant">esi</span>: int <span class="SpecialChar"><-</span> copy <span class="Constant">1</span>
<span id="L74" class="LineNr"> 74 </span> <span class="PreProc">var</span> letter-count/<span class="Constant">edi</span>: int <span class="SpecialChar"><-</span> copy <span class="Constant">0</span>
<span id="L75" class="LineNr"> 75 </span> <span class="muComment"># while password stream isn't empty</span>
<span id="L76" class="LineNr"> 76 </span> <span class="muComment"># c = read byte from password</span>
<span id="L77" class="LineNr"> 77 </span> <span class="muComment"># if (c == letter)</span>
<span id="L78" class="LineNr"> 78 </span> <span class="muComment"># if (i == pos1)</span>
<span id="L79" class="LineNr"> 79 </span> <span class="muComment"># ++letter-count</span>
<span id="L80" class="LineNr"> 80 </span> <span class="muComment"># if (i == pos2)</span>
<span id="L81" class="LineNr"> 81 </span> <span class="muComment"># ++letter-count</span>
<span id="L82" class="LineNr"> 82 </span> <span class="muComment"># ++i</span>
<span id="L83" class="LineNr"> 83 </span> <span class="Delimiter">{</span>
<span id="L84" class="LineNr"> 84 </span><span class="CommentedCode">#? print-string 0, " "</span>
<span id="L85" class="LineNr"> 85 </span><span class="CommentedCode">#? print-int32-decimal 0, i</span>
<span id="L86" class="LineNr"> 86 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L87" class="LineNr"> 87 </span> <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="SpecialChar"><-</span> <a href='../../309stream.subx.html#L6'>stream-empty?</a> password
<span id="L88" class="LineNr"> 88 </span> compare done?, <span class="Constant">0</span> <span class="muComment"># false</span>
<span id="L89" class="LineNr"> 89 </span> <span class="PreProc">break-if-!=</span>
<span id="L90" class="LineNr"> 90 </span> <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="SpecialChar"><-</span> <a href='../../112read-byte.subx.html#L273'>read-byte</a> password
<span id="L91" class="LineNr"> 91 </span><span class="CommentedCode">#? {</span>
<span id="L92" class="LineNr"> 92 </span><span class="CommentedCode">#? var c2/eax: int <- copy c</span>
<span id="L93" class="LineNr"> 93 </span><span class="CommentedCode">#? print-int32-decimal 0, c2</span>
<span id="L94" class="LineNr"> 94 </span><span class="CommentedCode">#? print-string 0, "\n"</span>
<span id="L95" class="LineNr"> 95 </span><span class="CommentedCode">#? }</span>
<span id="L96" class="LineNr"> 96 </span> compare c, letter
<span id="L97" class="LineNr"> 97 </span> <span class="Delimiter">{</span>
<span id="L98" class="LineNr"> 98 </span> <span class="PreProc">break-if-!=</span>
<span id="L99" class="LineNr"> 99 </span> compare i, pos1
<span id="L100" class="LineNr">100 </span> <span class="Delimiter">{</span>
<span id="L101" class="LineNr">101 </span> <span class="PreProc">break-if-!=</span>
<span id="L102" class="LineNr">102 </span> letter-count <span class="SpecialChar"><-</span> increment
<span id="L103" class="LineNr">103 </span><span class="CommentedCode">#? print-string 0, " hit\n"</span>
<span id="L104" class="LineNr">104 </span> <span class="Delimiter">}</span>
<span id="L105" class="LineNr">105 </span> compare i, pos2
<span id="L106" class="LineNr">106 </span> <span class="Delimiter">{</span>
<span id="L107" class="LineNr">107 </span> <span class="PreProc">break-if-!=</span>
<span id="L108" class="LineNr">108 </span> letter-count <span class="SpecialChar"><-</span> increment
<span id="L109" class="LineNr">109 </span><span class="CommentedCode">#? print-string 0, " hit\n"</span>
<span id="L110" class="LineNr">110 </span> <span class="Delimiter">}</span>
<span id="L111" class="LineNr">111 </span> <span class="Delimiter">}</span>
<span id="L112" class="LineNr">112 </span> i <span class="SpecialChar"><-</span> increment
<span id="L113" class="LineNr">113 </span> <span class="PreProc">loop</span>
<span id="L114" class="LineNr">114 </span> <span class="Delimiter">}</span>
<span id="L115" class="LineNr">115 </span> <span class="muComment"># return (letter-count == 1)</span>
<span id="L116" class="LineNr">116 </span> compare letter-count, <span class="Constant">1</span>
<span id="L117" class="LineNr">117 </span> <span class="Delimiter">{</span>
<span id="L118" class="LineNr">118 </span> <span class="PreProc">break-if-!=</span>
<span id="L119" class="LineNr">119 </span> <span class="PreProc">return</span> <span class="Constant">1</span> <span class="muComment"># true</span>
<span id="L120" class="LineNr">120 </span> <span class="Delimiter">}</span>
<span id="L121" class="LineNr">121 </span> <span class="PreProc">return</span> <span class="Constant">0</span> <span class="muComment"># false</span>
<span id="L122" class="LineNr">122 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|