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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>Compatibility</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="../index.html">
<img src="../docs-src/Figures/Inform.png" height=72">
</a></h1>
<ul><li><a href="../compiler.html">compiler tools</a></li>
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<li><a href="../units.html">unit test tools</a></li>
</ul><h2>Compiler Webs</h2><ul>
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</ul><h2>Inbuild Modules</h2><ul>
<li><a href="../supervisor-module/index.html">supervisor</a></li>
</ul><h2>Inform7 Modules</h2><ul>
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<li><a href="../if-module/index.html">if</a></li>
<li><a href="../multimedia-module/index.html">multimedia</a></li>
<li><a href="../problems-module/index.html">problems</a></li>
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</ul><h2>Inter Modules</h2><ul>
<li><a href="../bytecode-module/index.html">bytecode</a></li>
<li><a href="../building-module/index.html">building</a></li>
<li><a href="../codegen-module/index.html">codegen</a></li>
</ul><h2>Shared Modules</h2><ul>
<li><a href="index.html"><span class="selectedlink">arch</span></a></li>
<li><a href="../syntax-module/index.html">syntax</a></li>
<li><a href="../words-module/index.html">words</a></li>
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<main role="main">
<!--Weave of 'Compatibility' generated by 7-->
<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Shared Modules</a></li><li><a href="index.html">arch</a></li><li><a href="index.html#2">Chapter 2: Architectures</a></li><li><b>Compatibility</b></li></ul><p class="purpose">To manage compatibility lists: what can be compiled to what format.</p>
<p class="inwebparagraph"><a id="SP1"></a><b>&#167;1. </b></p>
<pre class="display">
<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">compatibility_specification</span><span class="plain"> {</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">parsed_from</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">default_allows</span><span class="plain">;</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">linked_list</span><span class="plain"> *</span><span class="identifier">exceptions</span><span class="plain">; </span><span class="comment"> of <code class="display"><span class="extract">target_vm</span></code></span>
<span class="identifier">MEMORY_MANAGEMENT</span>
<span class="plain">} </span><span class="reserved">compatibility_specification</span><span class="plain">;</span>
<span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="functiontext">Compatibility::all<button class="popup" onclick="togglePopup('usagePopup25')">...<span class="popuptext" id="usagePopup25">Usage of <b>Compatibility::all</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
<span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain"> = </span><span class="identifier">CREATE</span><span class="plain">(</span><span class="reserved">compatibility_specification</span><span class="plain">);</span>
<span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">parsed_from</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">default_allows</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">exceptions</span><span class="plain"> = </span><span class="identifier">NEW_LINKED_LIST</span><span class="plain">(</span><span class="reserved">target_vm</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">C</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Compatibility::universal<button class="popup" onclick="togglePopup('usagePopup26')">...<span class="popuptext" id="usagePopup26">Usage of <b>Compatibility::universal</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">C</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">LinkedLists::len</span><span class="plain">(</span><span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">exceptions</span><span class="plain">) &gt; </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">default_allows</span><span class="plain"> == </span><span class="identifier">FALSE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Compatibility::write<button class="popup" onclick="togglePopup('usagePopup27')">...<span class="popuptext" id="usagePopup27">Usage of <b>Compatibility::write</b>:<br>none</span></button></span><span class="plain">(</span><span class="identifier">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">C</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) { </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"for none"</span><span class="plain">); </span><span class="reserved">return</span><span class="plain">; }</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">x</span><span class="plain"> = </span><span class="identifier">LinkedLists::len</span><span class="plain">(</span><span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">exceptions</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">x</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">C</span><span class="plain">-&gt;</span><span class="element">default_allows</span><span class="plain">) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"for all"</span><span class="plain">);</span>
<span class="reserved">else</span><span class="plain"> </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"for none"</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">C</span><span class="plain">-&gt;</span><span class="element">default_allows</span><span class="plain">) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"not "</span><span class="plain">);</span>
<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"for "</span><span class="plain">);</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">n</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
<span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">VM</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER_LINKED_LIST</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain">, </span><span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">exceptions</span><span class="plain">) {</span>
<span class="identifier">n</span><span class="plain">++;</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">n</span><span class="plain"> &gt; </span><span class="constant">1</span><span class="plain">) &amp;&amp; (</span><span class="identifier">n</span><span class="plain"> &lt; </span><span class="identifier">x</span><span class="plain">)) </span><span class="identifier">WRITE</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">n</span><span class="plain"> &gt; </span><span class="constant">1</span><span class="plain">) &amp;&amp; (</span><span class="identifier">n</span><span class="plain"> == </span><span class="identifier">x</span><span class="plain">)) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">" or "</span><span class="plain">);</span>
<span class="functiontext"><a href="2-tvm.html#SP1">TargetVMs::write</a></span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">VM</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="functiontext">Compatibility::from_text<button class="popup" onclick="togglePopup('usagePopup28')">...<span class="popuptext" id="usagePopup28">Usage of <b>Compatibility::from_text</b>:<br>none</span></button></span><span class="plain">(</span><span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">text</span><span class="plain">) {</span>
<span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain"> = </span><span class="functiontext"><a href="2-cmp.html#SP1">Compatibility::all</a></span><span class="plain">();</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">incorrect</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::len</span><span class="plain">(</span><span class="identifier">text</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">C</span><span class="plain">;</span>
<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">, </span><span class="string">"%S"</span><span class="plain">, </span><span class="identifier">text</span><span class="plain">);</span>
<span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">parsed_from</span><span class="plain"> = </span><span class="identifier">Str::duplicate</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="identifier">Str::trim_white_space</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">Str::get_first_char</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">) == </span><span class="character">'('</span><span class="plain">) &amp;&amp; (</span><span class="identifier">Str::get_last_char</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">) == </span><span class="character">')'</span><span class="plain">)) {</span>
<span class="identifier">Str::delete_first_character</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="identifier">Str::delete_last_character</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="identifier">Str::trim_white_space</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="identifier">LOOP_THROUGH_TEXT</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">, </span><span class="identifier">parse</span><span class="plain">)</span>
<span class="identifier">Str::put</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">, </span><span class="identifier">Characters::tolower</span><span class="plain">(</span><span class="identifier">Str::get</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">)));</span>
<span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">default_allows</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="identifier">match_results</span><span class="plain"> </span><span class="identifier">mr</span><span class="plain"> = </span><span class="identifier">Regexp::create_mr</span><span class="plain">();</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">negated</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Regexp::match</span><span class="plain">(&amp;</span><span class="identifier">mr</span><span class="plain">, </span><span class="identifier">parse</span><span class="plain">, </span><span class="identifier">L</span><span class="string">"not (%c+)"</span><span class="plain">)) {</span>
<span class="identifier">Str::clear</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">, </span><span class="string">"%S"</span><span class="plain">, </span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0]);</span>
<span class="identifier">Str::trim_white_space</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">default_allows</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="identifier">negated</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Regexp::match</span><span class="plain">(&amp;</span><span class="identifier">mr</span><span class="plain">, </span><span class="identifier">parse</span><span class="plain">, </span><span class="identifier">L</span><span class="string">"for (%c+)"</span><span class="plain">)) {</span>
<span class="identifier">Str::clear</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">, </span><span class="string">"%S"</span><span class="plain">, </span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0]);</span>
<span class="identifier">Str::trim_white_space</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Regexp::match</span><span class="plain">(&amp;</span><span class="identifier">mr</span><span class="plain">, </span><span class="identifier">parse</span><span class="plain">, </span><span class="identifier">L</span><span class="string">"(%c+) only"</span><span class="plain">)) {</span>
<span class="identifier">Str::clear</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">, </span><span class="string">"%S"</span><span class="plain">, </span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0]);</span>
<span class="identifier">Str::trim_white_space</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">negated</span><span class="plain">) </span><span class="identifier">incorrect</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">; </span><span class="comment"> "not for 32d only"</span>
<span class="plain">}</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::eq</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"all"</span><span class="plain">)) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">negated</span><span class="plain">) </span><span class="identifier">incorrect</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">; </span><span class="comment"> "not for all"</span>
<span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">default_allows</span><span class="plain"> = </span><span class="identifier">TRUE</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">Str::eq</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"none"</span><span class="plain">)) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">negated</span><span class="plain">) </span><span class="identifier">incorrect</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">; </span><span class="comment"> "not for none"</span>
<span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">default_allows</span><span class="plain"> = </span><span class="identifier">FALSE</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="functiontext"><a href="2-cmp.html#SP1">Compatibility::clause</a></span><span class="plain">(</span><span class="identifier">C</span><span class="plain">, </span><span class="identifier">parse</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">)</span>
<span class="identifier">incorrect</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">parse</span><span class="plain">);</span>
<span class="identifier">Regexp::dispose_of</span><span class="plain">(&amp;</span><span class="identifier">mr</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">incorrect</span><span class="plain">) </span><span class="identifier">C</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">C</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">compat_parser_state</span><span class="plain"> {</span>
<span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">;</span>
<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">current_family</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">version_allowed</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">version_required</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">family_used</span><span class="plain">;</span>
<span class="plain">} </span><span class="reserved">compat_parser_state</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Compatibility::clause<button class="popup" onclick="togglePopup('usagePopup29')">...<span class="popuptext" id="usagePopup29">Usage of <b>Compatibility::clause</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">, </span><span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">text</span><span class="plain">) {</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">correct</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="identifier">match_results</span><span class="plain"> </span><span class="identifier">mr</span><span class="plain"> = </span><span class="identifier">Regexp::create_mr</span><span class="plain">();</span>
<span class="reserved">compat_parser_state</span><span class="plain"> </span><span class="identifier">cps</span><span class="plain">;</span>
<span class="identifier">cps</span><span class="plain">.</span><span class="element">C</span><span class="plain"> = </span><span class="identifier">C</span><span class="plain">; </span><span class="identifier">cps</span><span class="plain">.</span><span class="element">version_allowed</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">; </span><span class="identifier">cps</span><span class="plain">.</span><span class="element">version_required</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="identifier">cps</span><span class="plain">.</span><span class="element">current_family</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">; </span><span class="identifier">cps</span><span class="plain">.</span><span class="element">family_used</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">while</span><span class="plain"> (</span><span class="identifier">Regexp::match</span><span class="plain">(&amp;</span><span class="identifier">mr</span><span class="plain">, </span><span class="identifier">text</span><span class="plain">, </span><span class="identifier">L</span><span class="string">"(%C+) (%c+)"</span><span class="plain">)) {</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">comma</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::get_last_char</span><span class="plain">(</span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0]) == </span><span class="character">','</span><span class="plain">) {</span>
<span class="identifier">comma</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="identifier">Str::delete_last_character</span><span class="plain">(</span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0]);</span>
<span class="identifier">Str::trim_white_space</span><span class="plain">(</span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0]);</span>
<span class="plain">}</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">with</span><span class="plain"> = </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">;</span>
<span class="identifier">match_results</span><span class="plain"> </span><span class="identifier">mr2</span><span class="plain"> = </span><span class="identifier">Regexp::create_mr</span><span class="plain">();</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Regexp::match</span><span class="plain">(&amp;</span><span class="identifier">mr2</span><span class="plain">, </span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1], </span><span class="identifier">L</span><span class="string">"with debugging,* *(%c*)"</span><span class="plain">)) {</span>
<span class="identifier">Str::clear</span><span class="plain">(</span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1]);</span>
<span class="identifier">Str::copy</span><span class="plain">(</span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1], </span><span class="identifier">mr2</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0]);</span>
<span class="identifier">with</span><span class="plain"> = </span><span class="identifier">TRUE</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">Regexp::match</span><span class="plain">(&amp;</span><span class="identifier">mr2</span><span class="plain">, </span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1], </span><span class="identifier">L</span><span class="string">"without debugging,* *(%c*)"</span><span class="plain">)) {</span>
<span class="identifier">Str::clear</span><span class="plain">(</span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1]);</span>
<span class="identifier">Str::copy</span><span class="plain">(</span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1], </span><span class="identifier">mr2</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0]);</span>
<span class="identifier">with</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="identifier">Regexp::dispose_of</span><span class="plain">(&amp;</span><span class="identifier">mr2</span><span class="plain">);</span>
<span class="identifier">correct</span><span class="plain"> = (</span><span class="identifier">correct</span><span class="plain"> &amp;&amp; </span><span class="functiontext"><a href="2-cmp.html#SP1">Compatibility::word</a></span><span class="plain">(&amp;</span><span class="identifier">cps</span><span class="plain">, </span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0], </span><span class="identifier">with</span><span class="plain">));</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">comma</span><span class="plain">) </span><span class="identifier">correct</span><span class="plain"> = (</span><span class="identifier">correct</span><span class="plain"> &amp;&amp; </span><span class="functiontext"><a href="2-cmp.html#SP1">Compatibility::word</a></span><span class="plain">(&amp;</span><span class="identifier">cps</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"or"</span><span class="plain">, </span><span class="identifier">with</span><span class="plain">));</span>
<span class="identifier">Str::clear</span><span class="plain">(</span><span class="identifier">text</span><span class="plain">); </span><span class="identifier">Str::copy</span><span class="plain">(</span><span class="identifier">text</span><span class="plain">, </span><span class="identifier">mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1]);</span>
<span class="plain">}</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::len</span><span class="plain">(</span><span class="identifier">text</span><span class="plain">) &gt; </span><span class="constant">0</span><span class="plain">)</span>
<span class="identifier">correct</span><span class="plain"> = (</span><span class="identifier">correct</span><span class="plain"> &amp;&amp; </span><span class="functiontext"><a href="2-cmp.html#SP1">Compatibility::word</a></span><span class="plain">(&amp;</span><span class="identifier">cps</span><span class="plain">, </span><span class="identifier">text</span><span class="plain">, </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">));</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">correct</span><span class="plain">) &amp;&amp; (</span><span class="identifier">cps</span><span class="plain">.</span><span class="element">family_used</span><span class="plain"> == </span><span class="identifier">FALSE</span><span class="plain">) &amp;&amp; (</span><span class="identifier">Str::len</span><span class="plain">(</span><span class="identifier">cps</span><span class="plain">.</span><span class="element">current_family</span><span class="plain">) &gt; </span><span class="constant">0</span><span class="plain">)) {</span>
<span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">VM</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">cps</span><span class="plain">.</span><span class="element">current_family</span><span class="plain">, </span><span class="identifier">VM</span><span class="plain">-&gt;</span><span class="element">family_name</span><span class="plain">))</span>
<span class="functiontext"><a href="2-cmp.html#SP1">Compatibility::add</a></span><span class="plain">(</span><span class="identifier">C</span><span class="plain">, </span><span class="identifier">VM</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="identifier">Regexp::dispose_of</span><span class="plain">(&amp;</span><span class="identifier">mr</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">correct</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Compatibility::word<button class="popup" onclick="togglePopup('usagePopup30')">...<span class="popuptext" id="usagePopup30">Usage of <b>Compatibility::word</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">compat_parser_state</span><span class="plain"> *</span><span class="identifier">cps</span><span class="plain">, </span><span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">word</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">with</span><span class="plain">) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">version_allowed</span><span class="plain">) {</span>
<span class="identifier">semantic_version_number</span><span class="plain"> </span><span class="identifier">V</span><span class="plain"> = </span><span class="identifier">VersionNumbers::from_text</span><span class="plain">(</span><span class="identifier">word</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">VersionNumbers::is_null</span><span class="plain">(</span><span class="identifier">V</span><span class="plain">)) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">version_required</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</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">Str::len</span><span class="plain">(</span><span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">current_family</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">FALSE</span><span class="plain">;</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">family_used</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">VM</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">seen</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">-&gt;</span><span class="element">family_name</span><span class="plain">, </span><span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">current_family</span><span class="plain">)) {</span>
<span class="identifier">seen</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">VersionNumbers::eq</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">-&gt;</span><span class="element">version</span><span class="plain">, </span><span class="identifier">V</span><span class="plain">)) &amp;&amp;</span>
<span class="plain">((</span><span class="identifier">with</span><span class="plain"> == </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">) || (</span><span class="functiontext"><a href="2-tvm.html#SP1">TargetVMs::debug_enabled</a></span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">) == </span><span class="identifier">with</span><span class="plain">)))</span>
<span class="functiontext"><a href="2-cmp.html#SP1">Compatibility::add</a></span><span class="plain">(</span><span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">C</span><span class="plain">, </span><span class="identifier">VM</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">version_required</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">seen</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">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">word</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"or"</span><span class="plain">)) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">with</span><span class="plain"> != </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">word</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"version"</span><span class="plain">)) ||</span>
<span class="plain">(</span><span class="identifier">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">word</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"versions"</span><span class="plain">))) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">with</span><span class="plain"> != </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">version_required</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">version_allowed</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">version_required</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">version_allowed</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">bits</span><span class="plain"> = </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">word</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"16-bit"</span><span class="plain">)) </span><span class="identifier">bits</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">word</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"32-bit"</span><span class="plain">)) </span><span class="identifier">bits</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">bits</span><span class="plain"> != </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">) {</span>
<span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">VM</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext"><a href="2-tvm.html#SP1">TargetVMs::is_16_bit</a></span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">) == </span><span class="identifier">bits</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">with</span><span class="plain"> == </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">) || (</span><span class="functiontext"><a href="2-tvm.html#SP1">TargetVMs::debug_enabled</a></span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">) == </span><span class="identifier">with</span><span class="plain">))</span>
<span class="functiontext"><a href="2-cmp.html#SP1">Compatibility::add</a></span><span class="plain">(</span><span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">C</span><span class="plain">, </span><span class="identifier">VM</span><span class="plain">);</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">current_family</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">family_used</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">with</span><span class="plain"> != </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">) {</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">seen</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">VM</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">-&gt;</span><span class="element">family_name</span><span class="plain">, </span><span class="identifier">word</span><span class="plain">)) {</span>
<span class="identifier">seen</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext"><a href="2-tvm.html#SP1">TargetVMs::debug_enabled</a></span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">) == </span><span class="identifier">with</span><span class="plain">)</span>
<span class="functiontext"><a href="2-cmp.html#SP1">Compatibility::add</a></span><span class="plain">(</span><span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">C</span><span class="plain">, </span><span class="identifier">VM</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">current_family</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">family_used</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">seen</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">VM</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Str::eq_insensitive</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">-&gt;</span><span class="element">family_name</span><span class="plain">, </span><span class="identifier">word</span><span class="plain">)) {</span>
<span class="identifier">cps</span><span class="plain">-&gt;</span><span class="element">current_family</span><span class="plain"> = </span><span class="identifier">VM</span><span class="plain">-&gt;</span><span class="element">family_name</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Compatibility::add<button class="popup" onclick="togglePopup('usagePopup31')">...<span class="popuptext" id="usagePopup31">Usage of <b>Compatibility::add</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">VM</span><span class="plain">) {</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">already_there</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">X</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER_LINKED_LIST</span><span class="plain">(</span><span class="identifier">X</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain">, </span><span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">exceptions</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">VM</span><span class="plain"> == </span><span class="identifier">X</span><span class="plain">)</span>
<span class="identifier">already_there</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">already_there</span><span class="plain"> == </span><span class="identifier">FALSE</span><span class="plain">)</span>
<span class="identifier">ADD_TO_LINKED_LIST</span><span class="plain">(</span><span class="identifier">VM</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain">, </span><span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">exceptions</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">already_there</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Compatibility::with<button class="popup" onclick="togglePopup('usagePopup32')">...<span class="popuptext" id="usagePopup32">Usage of <b>Compatibility::with</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">compatibility_specification</span><span class="plain"> *</span><span class="identifier">C</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">VM</span><span class="plain">) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">C</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">decision</span><span class="plain"> = </span><span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">default_allows</span><span class="plain">;</span>
<span class="reserved">target_vm</span><span class="plain"> *</span><span class="identifier">X</span><span class="plain">;</span>
<span class="identifier">LOOP_OVER_LINKED_LIST</span><span class="plain">(</span><span class="identifier">X</span><span class="plain">, </span><span class="reserved">target_vm</span><span class="plain">, </span><span class="identifier">C</span><span class="plain">-&gt;</span><span class="element">exceptions</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">VM</span><span class="plain"> == </span><span class="identifier">X</span><span class="plain">)</span>
<span class="identifier">decision</span><span class="plain"> = </span><span class="identifier">decision</span><span class="plain">?</span><span class="identifier">FALSE:TRUE</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">decision</span><span class="plain">;</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The structure compatibility_specification is private to this section.</p>
<p class="endnote">The structure compat_parser_state is private to this section.</p>
<hr class="tocbar">
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