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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>S/rt</title>
<meta name="viewport" content="width=device-width initial-scale=1">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Language" content="en-gb">
<link href="../inweb.css" rel="stylesheet" rev="stylesheet" type="text/css">
</head>
<body>
<nav role="navigation">
<h1><a href="../webs.html">Sources</a></h1>
<ul>
<li><a href="../compiler.html">compiler</a></li>
<li><a href="../other.html">other tools</a></li>
<li><a href="../extensions.html"><b>extensions and kits</b></a></li>
<li><a href="../units.html">unit test tools</a></li>
/ul>
<h2>Extensions</h2>
<ul>
<li><a href="../basic_inform/index.html">Basic Inform</a></li>
<li><a href="../standard_rules/index.html">Standard Rules</a></li>
</ul>
<h2>Kits</h2>
<ul>
<li><a href="../BasicInformKit/index.html">BasicInformKit</a></li>
<li><a href="../BasicInformExtrasKit/index.html">BasicInformExtrasKit</a></li>
<li><a href="../CommandParserKit/index.html">CommandParserKit</a></li>
<li><a href="../EnglishLanguageKit/index.html">EnglishLanguageKit</a></li>
<li><a href="../WorldModelKit/index.html">WorldModelKit</a></li>
</ul>
</nav>
<main role="main">
<!--Weave of 'S/tt' generated by 7-->
<ul class="crumbs"><li><a href="../webs.html">Source</a></li><li><a href="../extensions.html">Kits</a></li><li><a href="index.html">WorldModelKit</a></li><li><b>Time Template</b></li></ul><p class="purpose">Support for parsing and printing times of day.</p>
<ul class="toc"><li><a href="#SP1">&#167;1. Conversion To Number</a></li><li><a href="#SP2">&#167;2. Digital Printing</a></li><li><a href="#SP3">&#167;3. Analogue Printing</a></li><li><a href="#SP4">&#167;4. Understanding</a></li><li><a href="#SP5">&#167;5. Relative Time Token</a></li><li><a href="#SP6">&#167;6. Scene Change Machinery Rule</a></li><li><a href="#SP7">&#167;7. During Scene Matching</a></li><li><a href="#SP8">&#167;8. Scene Questions</a></li></ul><hr class="tocbar">
<p class="inwebparagraph"><a id="SP1"></a><b>&#167;1. Conversion To Number. </b></p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">NUMBER_TY_to_TIME_TY</span><span class="plain"> </span><span class="identifier">n</span><span class="plain">;</span>
<span class="identifier">n</span><span class="plain"> = </span><span class="identifier">n</span><span class="plain">%1440;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">n</span><span class="plain"> &lt; </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">n</span><span class="plain"> + </span><span class="constant">1440</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">n</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP2"></a><b>&#167;2. Digital Printing. </b>For instance, "2:06 am".
</p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">PrintTimeOfDay</span><span class="plain"> </span><span class="identifier">t</span><span class="plain"> </span><span class="identifier">h</span><span class="plain"> </span><span class="identifier">aop</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">t</span><span class="plain">&lt;0) { </span><span class="reserved">print</span><span class="plain"> </span><span class="string">"&lt;no time&gt;"</span><span class="plain">; </span><span class="reserved">return</span><span class="plain">; }</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">t</span><span class="plain"> &gt;= </span><span class="identifier">TWELVE_HOURS</span><span class="plain">) { </span><span class="identifier">aop</span><span class="plain"> = </span><span class="string">"pm"</span><span class="plain">; </span><span class="identifier">t</span><span class="plain"> = </span><span class="identifier">t</span><span class="plain"> </span><span class="constant">-</span><span class="plain"> </span><span class="identifier">TWELVE_HOURS</span><span class="plain">; } </span><span class="reserved">else</span><span class="plain"> </span><span class="identifier">aop</span><span class="plain"> = </span><span class="string">"am"</span><span class="plain">;</span>
<span class="identifier">h</span><span class="plain"> = </span><span class="identifier">t</span><span class="plain">/</span><span class="identifier">ONE_HOUR</span><span class="plain">; </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">h</span><span class="plain">==0) </span><span class="identifier">h</span><span class="plain">=12;</span>
<span class="reserved">print</span><span class="plain"> </span><span class="identifier">h</span><span class="plain">, </span><span class="string">":"</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">t</span><span class="plain">%</span><span class="identifier">ONE_HOUR</span><span class="plain"> &lt; </span><span class="constant">10</span><span class="plain">) </span><span class="reserved">print</span><span class="plain"> </span><span class="string">"0"</span><span class="plain">; </span><span class="reserved">print</span><span class="plain"> </span><span class="identifier">t</span><span class="plain">%</span><span class="identifier">ONE_HOUR</span><span class="plain">, </span><span class="string">" "</span><span class="plain">, (</span><span class="reserved">string</span><span class="plain">) </span><span class="identifier">aop</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP3"></a><b>&#167;3. Analogue Printing. </b>For instance, "six minutes past two".
</p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">PrintTimeOfDayEnglish</span><span class="plain"> </span><span class="identifier">t</span><span class="plain"> </span><span class="identifier">h</span><span class="plain"> </span><span class="identifier">m</span><span class="plain"> </span><span class="identifier">dir</span><span class="plain"> </span><span class="identifier">aop</span><span class="plain">;</span>
<span class="identifier">h</span><span class="plain"> = (</span><span class="identifier">t</span><span class="plain">/</span><span class="identifier">ONE_HOUR</span><span class="plain">) % </span><span class="constant">12</span><span class="plain">; </span><span class="identifier">m</span><span class="plain"> = </span><span class="identifier">t</span><span class="plain">%</span><span class="identifier">ONE_HOUR</span><span class="plain">; </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">h</span><span class="plain">==0) </span><span class="identifier">h</span><span class="plain">=12;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">m</span><span class="plain">==0) { </span><span class="reserved">print</span><span class="plain"> (</span><span class="identifier">number</span><span class="plain">) </span><span class="identifier">h</span><span class="plain">, </span><span class="string">" o'clock"</span><span class="plain">; </span><span class="reserved">return</span><span class="plain">; }</span>
<span class="identifier">dir</span><span class="plain"> = </span><span class="string">"past"</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">m</span><span class="plain"> &gt; </span><span class="identifier">HALF_HOUR</span><span class="plain">) { </span><span class="identifier">m</span><span class="plain"> = </span><span class="identifier">ONE_HOUR</span><span class="plain">-</span><span class="identifier">m</span><span class="plain">; </span><span class="identifier">h</span><span class="plain"> = (</span><span class="identifier">h</span><span class="plain">+1)%12; </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">h</span><span class="plain">==0) </span><span class="identifier">h</span><span class="plain">=12; </span><span class="identifier">dir</span><span class="plain"> = </span><span class="string">"to"</span><span class="plain">; }</span>
<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">m</span><span class="plain">) {</span>
<span class="identifier">QUARTER_HOUR</span><span class="plain">: </span><span class="reserved">print</span><span class="plain"> </span><span class="string">"quarter"</span><span class="plain">; </span><span class="identifier">HALF_HOUR</span><span class="plain">: </span><span class="reserved">print</span><span class="plain"> </span><span class="string">"half"</span><span class="plain">;</span>
<span class="reserved">default</span><span class="plain">: </span><span class="reserved">print</span><span class="plain"> (</span><span class="identifier">number</span><span class="plain">) </span><span class="identifier">m</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">m</span><span class="plain">%5 ~= </span><span class="constant">0</span><span class="plain">) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">m</span><span class="plain"> == </span><span class="constant">1</span><span class="plain">) </span><span class="reserved">print</span><span class="plain"> </span><span class="string">" minute"</span><span class="plain">; </span><span class="reserved">else</span><span class="plain"> </span><span class="reserved">print</span><span class="plain"> </span><span class="string">" minutes"</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="reserved">print</span><span class="plain"> </span><span class="string">" "</span><span class="plain">, (</span><span class="reserved">string</span><span class="plain">) </span><span class="identifier">dir</span><span class="plain">, </span><span class="string">" "</span><span class="plain">, (</span><span class="identifier">number</span><span class="plain">) </span><span class="identifier">h</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP4"></a><b>&#167;4. Understanding. </b>This I6 grammar token converts words in the player's command to a valid
I7 time, and is heavily based on the one presented as a solution to an
exercise in the DM4.
</p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">TIME_TOKEN</span><span class="plain"> </span><span class="identifier">first_word</span><span class="plain"> </span><span class="identifier">second_word</span><span class="plain"> </span><span class="identifier">at</span><span class="plain"> </span><span class="identifier">length</span><span class="plain"> </span><span class="identifier">flag</span>
<span class="identifier">illegal_char</span><span class="plain"> </span><span class="identifier">offhour</span><span class="plain"> </span><span class="identifier">hr</span><span class="plain"> </span><span class="identifier">mn</span><span class="plain"> </span><span class="identifier">i</span><span class="plain"> </span><span class="identifier">original_wn</span><span class="plain">;</span>
<span class="identifier">original_wn</span><span class="plain"> = </span><span class="identifier">wn</span><span class="plain">;</span>
<span class="identifier">i</span><span class="plain"> = </span><span class="identifier">TIME_TOKEN_INNER</span><span class="plain">();</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain"> ~= </span><span class="identifier">GPR_FAIL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">;</span>
<span class="identifier">wn</span><span class="plain"> = </span><span class="identifier">original_wn</span><span class="plain">;</span>
<span class="identifier">first_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">first_word</span><span class="plain">) {</span>
<span class="character">'midnight'</span><span class="plain">: </span><span class="identifier">parsed_number</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">; </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_NUMBER</span><span class="plain">;</span>
<span class="character">'midday'</span><span class="plain">, </span><span class="character">'noon'</span><span class="plain">: </span><span class="identifier">parsed_number</span><span class="plain"> = </span><span class="identifier">TWELVE_HOURS</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_NUMBER</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="comment">! Next try the format 12:02</span>
<span class="identifier">at</span><span class="plain"> = </span><span class="identifier">WordAddress</span><span class="plain">(</span><span class="identifier">wn</span><span class="plain">-1); </span><span class="identifier">length</span><span class="plain"> = </span><span class="identifier">WordLength</span><span class="plain">(</span><span class="identifier">wn</span><span class="plain">-1);</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0: </span><span class="identifier">i</span><span class="plain">&lt;</span><span class="identifier">length</span><span class="plain">: </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">at</span><span class="plain">-&gt;</span><span class="identifier">i</span><span class="plain">) {</span>
<span class="character">':'</span><span class="plain">: </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">flag</span><span class="plain"> == </span><span class="reserved">false</span><span class="plain"> &amp;&amp; </span><span class="identifier">i</span><span class="plain">&gt;0 &amp;&amp; </span><span class="identifier">i</span><span class="plain">&lt;</span><span class="identifier">length</span><span class="plain">-1) </span><span class="identifier">flag</span><span class="plain"> = </span><span class="reserved">true</span><span class="plain">;</span>
<span class="reserved">else</span><span class="plain"> </span><span class="identifier">illegal_char</span><span class="plain"> = </span><span class="reserved">true</span><span class="plain">;</span>
<span class="character">'0'</span><span class="plain">, </span><span class="character">'1'</span><span class="plain">, </span><span class="character">'2'</span><span class="plain">, </span><span class="character">'3'</span><span class="plain">, </span><span class="character">'4'</span><span class="plain">, </span><span class="character">'5'</span><span class="plain">, </span><span class="character">'6'</span><span class="plain">, </span><span class="character">'7'</span><span class="plain">, </span><span class="character">'8'</span><span class="plain">, </span><span class="character">'9'</span><span class="plain">: ;</span>
<span class="reserved">default</span><span class="plain">: </span><span class="identifier">illegal_char</span><span class="plain"> = </span><span class="reserved">true</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">length</span><span class="plain"> &lt; </span><span class="constant">3</span><span class="plain"> || </span><span class="identifier">length</span><span class="plain"> &gt; </span><span class="constant">5</span><span class="plain"> || </span><span class="identifier">illegal_char</span><span class="plain">) </span><span class="identifier">flag</span><span class="plain"> = </span><span class="reserved">false</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">flag</span><span class="plain">) {</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0: </span><span class="identifier">at</span><span class="plain">-&gt;</span><span class="identifier">i</span><span class="plain">~=</span><span class="character">':'</span><span class="plain">: </span><span class="identifier">i</span><span class="plain">++, </span><span class="identifier">hr</span><span class="plain">=</span><span class="identifier">hr</span><span class="plain">*10) </span><span class="identifier">hr</span><span class="plain"> = </span><span class="identifier">hr</span><span class="plain"> + </span><span class="identifier">at</span><span class="plain">-&gt;</span><span class="identifier">i</span><span class="plain"> </span><span class="constant">-</span><span class="plain"> </span><span class="character">'0'</span><span class="plain">;</span>
<span class="identifier">hr</span><span class="plain"> = </span><span class="identifier">hr</span><span class="plain">/10;</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">++: </span><span class="identifier">i</span><span class="plain">&lt;</span><span class="identifier">length</span><span class="plain">: </span><span class="identifier">i</span><span class="plain">++, </span><span class="identifier">mn</span><span class="plain">=</span><span class="identifier">mn</span><span class="plain">*10) </span><span class="identifier">mn</span><span class="plain"> = </span><span class="identifier">mn</span><span class="plain"> + </span><span class="identifier">at</span><span class="plain">-&gt;</span><span class="identifier">i</span><span class="plain"> </span><span class="constant">-</span><span class="plain"> </span><span class="character">'0'</span><span class="plain">;</span>
<span class="identifier">mn</span><span class="plain"> = </span><span class="identifier">mn</span><span class="plain">/10;</span>
<span class="identifier">second_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="identifier">parsed_number</span><span class="plain"> = </span><span class="identifier">HoursMinsWordToTime</span><span class="plain">(</span><span class="identifier">hr</span><span class="plain">, </span><span class="identifier">mn</span><span class="plain">, </span><span class="identifier">second_word</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">parsed_number</span><span class="plain"> == </span><span class="constant">-1</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_FAIL</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">second_word</span><span class="plain"> ~= </span><span class="character">'pm'</span><span class="plain"> </span><span class="reserved">or</span><span class="plain"> </span><span class="character">'am'</span><span class="plain">) </span><span class="identifier">wn</span><span class="plain">--;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_NUMBER</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="comment">! Lastly the wordy format</span>
<span class="identifier">offhour</span><span class="plain"> = </span><span class="constant">-1</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">first_word</span><span class="plain"> == </span><span class="character">'half'</span><span class="plain">) </span><span class="identifier">offhour</span><span class="plain"> = </span><span class="identifier">HALF_HOUR</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">first_word</span><span class="plain"> == </span><span class="character">'quarter'</span><span class="plain">) </span><span class="identifier">offhour</span><span class="plain"> = </span><span class="identifier">QUARTER_HOUR</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">offhour</span><span class="plain"> &lt; </span><span class="constant">0</span><span class="plain">) </span><span class="identifier">offhour</span><span class="plain"> = </span><span class="identifier">TryNumber</span><span class="plain">(</span><span class="identifier">wn</span><span class="plain">-1);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">offhour</span><span class="plain"> &lt; </span><span class="constant">0</span><span class="plain"> || </span><span class="identifier">offhour</span><span class="plain"> &gt;= </span><span class="identifier">ONE_HOUR</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_FAIL</span><span class="plain">;</span>
<span class="identifier">second_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">second_word</span><span class="plain">) {</span>
<span class="comment">! "six o'clock", "six"</span>
<span class="character">'o^clock'</span><span class="plain">, </span><span class="character">'am'</span><span class="plain">, </span><span class="character">'pm'</span><span class="plain">, </span><span class="constant">-1</span><span class="plain">:</span>
<span class="identifier">hr</span><span class="plain"> = </span><span class="identifier">offhour</span><span class="plain">; </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">hr</span><span class="plain"> &gt; </span><span class="constant">12</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_FAIL</span><span class="plain">;</span>
<span class="comment">! "quarter to six", "twenty past midnight"</span>
<span class="character">'to'</span><span class="plain">, </span><span class="character">'past'</span><span class="plain">:</span>
<span class="identifier">mn</span><span class="plain"> = </span><span class="identifier">offhour</span><span class="plain">; </span><span class="identifier">hr</span><span class="plain"> = </span><span class="identifier">TryNumber</span><span class="plain">(</span><span class="identifier">wn</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">hr</span><span class="plain"> &lt;= </span><span class="constant">0</span><span class="plain">) {</span>
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">NextWordStopped</span><span class="plain">()) {</span>
<span class="character">'noon'</span><span class="plain">, </span><span class="character">'midday'</span><span class="plain">: </span><span class="identifier">hr</span><span class="plain"> = </span><span class="constant">12</span><span class="plain">;</span>
<span class="character">'midnight'</span><span class="plain">: </span><span class="identifier">hr</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
<span class="reserved">default</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_FAIL</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">hr</span><span class="plain"> &gt;= </span><span class="constant">13</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_FAIL</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">second_word</span><span class="plain"> == </span><span class="character">'to'</span><span class="plain">) {</span>
<span class="identifier">mn</span><span class="plain"> = </span><span class="identifier">ONE_HOUR</span><span class="plain">-</span><span class="identifier">mn</span><span class="plain">; </span><span class="identifier">hr</span><span class="plain">--; </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">hr</span><span class="plain">&lt;0) </span><span class="identifier">hr</span><span class="plain">=23;</span>
<span class="plain">}</span>
<span class="identifier">wn</span><span class="plain">++; </span><span class="identifier">second_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="comment">! "six thirty"</span>
<span class="reserved">default</span><span class="plain">:</span>
<span class="identifier">hr</span><span class="plain"> = </span><span class="identifier">offhour</span><span class="plain">; </span><span class="identifier">mn</span><span class="plain"> = </span><span class="identifier">TryNumber</span><span class="plain">(--</span><span class="identifier">wn</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">mn</span><span class="plain"> &lt; </span><span class="constant">0</span><span class="plain"> || </span><span class="identifier">mn</span><span class="plain"> &gt;= </span><span class="identifier">ONE_HOUR</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_FAIL</span><span class="plain">;</span>
<span class="identifier">wn</span><span class="plain">++; </span><span class="identifier">second_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="plain">}</span>
<span class="identifier">parsed_number</span><span class="plain"> = </span><span class="identifier">HoursMinsWordToTime</span><span class="plain">(</span><span class="identifier">hr</span><span class="plain">, </span><span class="identifier">mn</span><span class="plain">, </span><span class="identifier">second_word</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">parsed_number</span><span class="plain"> &lt; </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_FAIL</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">second_word</span><span class="plain"> ~= </span><span class="character">'pm'</span><span class="plain"> </span><span class="reserved">or</span><span class="plain"> </span><span class="character">'am'</span><span class="plain"> </span><span class="reserved">or</span><span class="plain"> </span><span class="character">'o^clock'</span><span class="plain">) </span><span class="identifier">wn</span><span class="plain">--;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_NUMBER</span><span class="plain">;</span>
<span class="plain">];</span>
<span class="plain">[ </span><span class="identifier">HoursMinsWordToTime</span><span class="plain"> </span><span class="identifier">hour</span><span class="plain"> </span><span class="identifier">minute</span><span class="plain"> </span><span class="identifier">word</span><span class="plain"> </span><span class="identifier">x</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">hour</span><span class="plain"> &gt;= </span><span class="constant">24</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">-1</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">minute</span><span class="plain"> &gt;= </span><span class="identifier">ONE_HOUR</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">-1</span><span class="plain">;</span>
<span class="identifier">x</span><span class="plain"> = </span><span class="identifier">hour</span><span class="plain">*</span><span class="identifier">ONE_HOUR</span><span class="plain"> + </span><span class="identifier">minute</span><span class="plain">; </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">hour</span><span class="plain"> &gt;= </span><span class="constant">13</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">x</span><span class="plain">;</span>
<span class="identifier">x</span><span class="plain"> = </span><span class="identifier">x</span><span class="plain"> % </span><span class="identifier">TWELVE_HOURS</span><span class="plain">; </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">word</span><span class="plain"> == </span><span class="character">'pm'</span><span class="plain">) </span><span class="identifier">x</span><span class="plain"> = </span><span class="identifier">x</span><span class="plain"> + </span><span class="identifier">TWELVE_HOURS</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">word</span><span class="plain"> ~= </span><span class="character">'am'</span><span class="plain"> </span><span class="reserved">or</span><span class="plain"> </span><span class="character">'pm'</span><span class="plain"> &amp;&amp; </span><span class="identifier">hour</span><span class="plain"> == </span><span class="constant">12</span><span class="plain">) </span><span class="identifier">x</span><span class="plain"> = </span><span class="identifier">x</span><span class="plain"> + </span><span class="identifier">TWELVE_HOURS</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">x</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP5"></a><b>&#167;5. Relative Time Token. </b>"Time" is an interesting kind of value since it can hold two conceptually
different ways of thinking about time: absolute times, such as "12:03 PM",
and also relative times, like "ten minutes". For parsing purposes, these
are completely different from each other, and the time token above handles
only absolute times; we need the following for relative ones.
</p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">RELATIVE_TIME_TOKEN</span><span class="plain"> </span><span class="identifier">first_word</span><span class="plain"> </span><span class="identifier">second_word</span><span class="plain"> </span><span class="identifier">offhour</span><span class="plain"> </span><span class="identifier">mult</span><span class="plain"> </span><span class="identifier">mn</span><span class="plain"> </span><span class="identifier">original_wn</span><span class="plain">;</span>
<span class="identifier">original_wn</span><span class="plain"> = </span><span class="identifier">wn</span><span class="plain">;</span>
<span class="identifier">wn</span><span class="plain"> = </span><span class="identifier">original_wn</span><span class="plain">;</span>
<span class="identifier">first_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">(); </span><span class="identifier">wn</span><span class="plain">--;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">first_word</span><span class="plain"> == </span><span class="character">'an'</span><span class="plain"> </span><span class="reserved">or</span><span class="plain"> </span><span class="character">'a//'</span><span class="plain">) </span><span class="identifier">mn</span><span class="plain">=1; </span><span class="reserved">else</span><span class="plain"> </span><span class="identifier">mn</span><span class="plain">=</span><span class="identifier">TryNumber</span><span class="plain">(</span><span class="identifier">wn</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">mn</span><span class="plain"> == </span><span class="constant">-1000</span><span class="plain">) {</span>
<span class="identifier">first_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">first_word</span><span class="plain"> == </span><span class="character">'half'</span><span class="plain">) </span><span class="identifier">offhour</span><span class="plain"> = </span><span class="identifier">HALF_HOUR</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">first_word</span><span class="plain"> == </span><span class="character">'quarter'</span><span class="plain">) </span><span class="identifier">offhour</span><span class="plain"> = </span><span class="identifier">QUARTER_HOUR</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">offhour</span><span class="plain"> &gt; </span><span class="constant">0</span><span class="plain">) {</span>
<span class="identifier">second_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">second_word</span><span class="plain"> == </span><span class="character">'of'</span><span class="plain">) </span><span class="identifier">second_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">second_word</span><span class="plain"> == </span><span class="character">'an'</span><span class="plain">) </span><span class="identifier">second_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">second_word</span><span class="plain"> == </span><span class="character">'hour'</span><span class="plain">) {</span>
<span class="identifier">parsed_number</span><span class="plain"> = </span><span class="identifier">offhour</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_NUMBER</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_FAIL</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="identifier">wn</span><span class="plain">++;</span>
<span class="identifier">first_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">first_word</span><span class="plain">) {</span>
<span class="character">'minutes'</span><span class="plain">, </span><span class="character">'minute'</span><span class="plain">: </span><span class="identifier">mult</span><span class="plain"> = </span><span class="constant">1</span><span class="plain">;</span>
<span class="character">'hours'</span><span class="plain">, </span><span class="character">'hour'</span><span class="plain">: </span><span class="identifier">mult</span><span class="plain"> = </span><span class="constant">60</span><span class="plain">;</span>
<span class="reserved">default</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_FAIL</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="identifier">parsed_number</span><span class="plain"> = </span><span class="identifier">mn</span><span class="plain">*</span><span class="identifier">mult</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">mult</span><span class="plain"> == </span><span class="constant">60</span><span class="plain">) {</span>
<span class="identifier">mn</span><span class="plain">=</span><span class="identifier">TryNumber</span><span class="plain">(</span><span class="identifier">wn</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">mn</span><span class="plain"> ~= </span><span class="constant">-1000</span><span class="plain">) {</span>
<span class="identifier">wn</span><span class="plain">++;</span>
<span class="identifier">first_word</span><span class="plain"> = </span><span class="identifier">NextWordStopped</span><span class="plain">();</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">first_word</span><span class="plain"> == </span><span class="character">'minutes'</span><span class="plain"> </span><span class="reserved">or</span><span class="plain"> </span><span class="character">'minute'</span><span class="plain">)</span>
<span class="identifier">parsed_number</span><span class="plain"> = </span><span class="identifier">parsed_number</span><span class="plain"> + </span><span class="identifier">mn</span><span class="plain">;</span>
<span class="reserved">else</span><span class="plain"> </span><span class="identifier">wn</span><span class="plain"> = </span><span class="identifier">wn</span><span class="plain"> </span><span class="constant">-</span><span class="plain"> </span><span class="constant">2</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">GPR_NUMBER</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP6"></a><b>&#167;6. Scene Change Machinery Rule. </b></p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">SCENE_CHANGE_MACHINERY_R</span><span class="plain">;</span>
<span class="identifier">DetectSceneChange</span><span class="plain">();</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP7"></a><b>&#167;7. During Scene Matching. </b></p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">DuringSceneMatching</span><span class="plain"> </span><span class="identifier">prop</span><span class="plain"> </span><span class="identifier">sc</span><span class="plain">;</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">sc</span><span class="plain">=0: </span><span class="identifier">sc</span><span class="plain">&lt;</span><span class="identifier">NUMBER_SCENES_CREATED</span><span class="plain">: </span><span class="identifier">sc</span><span class="plain">++)</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">scene_status</span><span class="plain">--&gt;</span><span class="identifier">sc</span><span class="plain"> == </span><span class="constant">1</span><span class="plain">) &amp;&amp; (</span><span class="identifier">prop</span><span class="plain">(</span><span class="identifier">sc</span><span class="plain">+1))) </span><span class="reserved">rtrue</span><span class="plain">;</span>
<span class="reserved">rfalse</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP8"></a><b>&#167;8. Scene Questions. </b></p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">SceneUtility</span><span class="plain"> </span><span class="identifier">sc</span><span class="plain"> </span><span class="identifier">task</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">sc</span><span class="plain"> &lt;= </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">0</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">task</span><span class="plain"> == </span><span class="constant">1</span><span class="plain"> </span><span class="reserved">or</span><span class="plain"> </span><span class="constant">2</span><span class="plain">) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">scene_endings</span><span class="plain">--&gt;(</span><span class="identifier">sc</span><span class="plain">-1) == </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">RunTimeProblem</span><span class="plain">(</span><span class="identifier">RTP_SCENEHASNTSTARTED</span><span class="plain">, </span><span class="identifier">sc</span><span class="plain">);</span>
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">scene_endings</span><span class="plain">--&gt;(</span><span class="identifier">sc</span><span class="plain">-1) &lt;= </span><span class="constant">1</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">RunTimeProblem</span><span class="plain">(</span><span class="identifier">RTP_SCENEHASNTENDED</span><span class="plain">, </span><span class="identifier">sc</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">task</span><span class="plain">) {</span>
<span class="constant">1</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> (</span><span class="identifier">the_time</span><span class="plain"> </span><span class="constant">-</span><span class="plain"> </span><span class="identifier">scene_started</span><span class="plain">--&gt;(</span><span class="identifier">sc</span><span class="plain">-1))%(</span><span class="identifier">TWENTY_FOUR_HOURS</span><span class="plain">);</span>
<span class="constant">2</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">scene_started</span><span class="plain">--&gt;(</span><span class="identifier">sc</span><span class="plain">-1);</span>
<span class="constant">3</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> (</span><span class="identifier">the_time</span><span class="plain"> </span><span class="constant">-</span><span class="plain"> </span><span class="identifier">scene_ended</span><span class="plain">--&gt;(</span><span class="identifier">sc</span><span class="plain">-1))%(</span><span class="identifier">TWENTY_FOUR_HOURS</span><span class="plain">);</span>
<span class="constant">4</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">scene_ended</span><span class="plain">--&gt;(</span><span class="identifier">sc</span><span class="plain">-1);</span>
<span class="plain">}</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
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