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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<title>C Literals</title>
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<main role="main">
<!--Weave of 'C Literals' generated by Inweb-->
<div class="breadcrumbs">
<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../intern.html">Inter Modules</a></li><li><a href="index.html">final</a></li><li><a href="index.html#5">Chapter 5: C</a></li><li><b>C Literals</b></li></ul></div>
<p class="purpose">Text and dictionary words translated to C.</p>
<ul class="toc"><li><a href="5-clt.html#SP1">&#167;1. Introduction</a></li><li><a href="5-clt.html#SP2">&#167;2. Symbols</a></li><li><a href="5-clt.html#SP3">&#167;3. Integers</a></li><li><a href="5-clt.html#SP4">&#167;4. Real numbers</a></li><li><a href="5-clt.html#SP5">&#167;5. Texts</a></li><li><a href="5-clt.html#SP8">&#167;8. Action names</a></li><li><a href="5-clt.html#SP9">&#167;9. Dictionary words</a></li></ul><hr class="tocbar">
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. Introduction. </b>We take the word "literal" broadly rather than, well, literally: we include
under this heading a variety of ingredients of expressions which can legally be
used as constants.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::initialise</span><button class="popup" onclick="togglePopup('usagePopup1')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup1">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::initialise</span></span>:<br/>Final C - <a href="5-fnc.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generator</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="constant-syntax">COMPILE_DICTIONARY_WORD_MTID</span><span class="plain-syntax">, </span><a href="5-clt.html#SP10" class="function-link"><span class="function-syntax">CLiteralsModel::compile_dictionary_word</span></a><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="constant-syntax">COMPILE_LITERAL_NUMBER_MTID</span><span class="plain-syntax">, </span><a href="5-clt.html#SP3" class="function-link"><span class="function-syntax">CLiteralsModel::compile_literal_number</span></a><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="constant-syntax">COMPILE_LITERAL_REAL_MTID</span><span class="plain-syntax">, </span><a href="5-clt.html#SP4" class="function-link"><span class="function-syntax">CLiteralsModel::compile_literal_real</span></a><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="constant-syntax">COMPILE_LITERAL_TEXT_MTID</span><span class="plain-syntax">, </span><a href="5-clt.html#SP5" class="function-link"><span class="function-syntax">CLiteralsModel::compile_literal_text</span></a><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="constant-syntax">COMPILE_LITERAL_SYMBOL_MTID</span><span class="plain-syntax">, </span><a href="5-clt.html#SP2" class="function-link"><span class="function-syntax">CLiteralsModel::compile_literal_symbol</span></a><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="constant-syntax">NEW_ACTION_MTID</span><span class="plain-syntax">, </span><a href="5-clt.html#SP8" class="function-link"><span class="function-syntax">CLiteralsModel::new_action</span></a><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">C_generation_literals_model_data</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_count</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">texts</span><span class="plain-syntax">; </span><span class="comment-syntax"> of </span><span class="extract"><span class="extract-syntax">text_stream</span></span>
<span class="plain-syntax">} </span><span class="reserved-syntax">C_generation_literals_model_data</span><span class="plain-syntax">;</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::initialise_data</span><button class="popup" onclick="togglePopup('usagePopup2')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup2">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::initialise_data</span></span>:<br/>Final C - <a href="5-fnc.html#SP4">&#167;4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">litdata</span><span class="plain-syntax">.</span><span class="element-syntax">text_count</span><span class="plain-syntax">) = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">litdata</span><span class="plain-syntax">.</span><span class="element-syntax">texts</span><span class="plain-syntax">) = </span><span class="identifier-syntax">NEW_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">text_stream</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::begin</span><button class="popup" onclick="togglePopup('usagePopup3')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup3">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::begin</span></span>:<br/>Final C - <a href="5-fnc.html#SP5">&#167;5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><a href="5-clt.html#SP1" class="function-link"><span class="function-syntax">CLiteralsModel::initialise_data</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="5-clt.html#SP5" class="function-link"><span class="function-syntax">CLiteralsModel::begin_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::end</span><button class="popup" onclick="togglePopup('usagePopup4')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup4">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::end</span></span>:<br/>Final C - <a href="5-fnc.html#SP6">&#167;6</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><a href="5-clt.html#SP7" class="function-link"><span class="function-syntax">CLiteralsModel::end_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<ul class="endnotetexts"><li>The structure C_generation_literals_model_data is private to this section.</li></ul>
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>&#167;2. Symbols. </b>The following function expresses that a named constant can be used as a value in C
just by naming it. That seems too obvious to need a function, but one can imagine
languages where it is not true.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::compile_literal_symbol</span><button class="popup" onclick="togglePopup('usagePopup5')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup5">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::compile_literal_symbol</span></span>:<br/><a href="5-clt.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generator</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">aliased</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP14" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbol::trans</span><span class="plain-syntax">(</span><span class="identifier-syntax">aliased</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-cg2.html#SP15" class="function-link"><span class="function-syntax">Generators::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>&#167;3. Integers. </b>This is simple for once. A generator is not obliged to take the <span class="extract"><span class="extract-syntax">hex_mode</span></span> hint
and show the number in hex in the code it generates; functionally, decimal would
be just as good. But since we can easily do so, why not.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::compile_literal_number</span><button class="popup" onclick="togglePopup('usagePopup6')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup6">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::compile_literal_number</span></span>:<br/><a href="5-clt.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generator</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">val</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">hex_mode</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP14" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">hex_mode</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"0x%x"</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>&#167;4. Real numbers. </b>This is not at all simple, but the helpful <a href="2-vc.html#SP6" class="internal">VanillaConstants::textual_real_to_uint32</a>
does all the work for us.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::compile_literal_real</span><button class="popup" onclick="togglePopup('usagePopup7')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup7">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::compile_literal_real</span></span>:<br/><a href="5-clt.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generator</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">textual</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">uint32_t</span><span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-vc.html#SP6" class="function-link"><span class="function-syntax">VanillaConstants::textual_real_to_uint32</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">textual</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP14" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"(i7word_t) 0x%08x"</span><span class="plain-syntax">, </span><span class="identifier-syntax">n</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>&#167;5. Texts. </b>These are sometimes being used in <span class="extract"><span class="extract-syntax">inv !print</span></span> or <span class="extract"><span class="extract-syntax">inv !box</span></span>, in which case they
are never needed as values &mdash; they're just printed. If that's the case, we
render directly as a double-quoted C text literal.
</p>
<p class="commentary">Otherwise, we are in <span class="extract"><span class="extract-syntax">REGULAR_LTM</span></span> mode. In that case, a text must be represented
by a value which is "of the class String", meaning, a value in a range which
begins at the constant <span class="extract"><span class="extract-syntax">I7VAL_STRINGS_BASE</span></span>; subject to that requirement, we
have freedom to do more or less what we like, but we will make the smallest
range of String values possible. Each text will have a unique ID number counting
upwards from <span class="extract"><span class="extract-syntax">I7VAL_STRINGS_BASE</span></span>. The actual text this represents will be an
entry in the <span class="extract"><span class="extract-syntax">i7_texts</span></span> array, which can be accessed using the
<span class="extract"><span class="extract-syntax">i7_text_to_C_string</span></span> function.
</p>
<p class="commentary">(This is in contrast to the Inform 6 situation, where texts are represented by
addresses of compressed text in memory, so that the values are not consecutive
and the range they spread out over can be very large.)
</p>
<pre class="Extracts-displayed-code all-displayed-code code-font">
<span class="Extracts-identifier-syntax">char</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">i7_text_to_C_string</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7word_t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">str</span><span class="Extracts-plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This is part of the extract file inform7_clib.h.</li></ul>
<pre class="Extracts-displayed-code all-displayed-code code-font">
<span class="Extracts-identifier-syntax">char</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">i7_texts</span><span class="Extracts-plain-syntax">[];</span>
<span class="Extracts-identifier-syntax">char</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">i7_text_to_C_string</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7word_t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">str</span><span class="Extracts-plain-syntax">) {</span>
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_texts</span><span class="Extracts-plain-syntax">[</span><span class="Extracts-identifier-syntax">str</span><span class="Extracts-plain-syntax"> - </span><span class="Extracts-identifier-syntax">I7VAL_STRINGS_BASE</span><span class="Extracts-plain-syntax">];</span>
<span class="Extracts-plain-syntax">}</span>
</pre>
<ul class="endnotetexts"><li>This is part of the extract file inform7_clib.c.</li></ul>
<p class="commentary">The <span class="extract"><span class="Extracts-extract-syntax">i7_texts</span></span> array is written one entry at a time as we go along, and is
started here:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::begin_text</span><button class="popup" onclick="togglePopup('usagePopup8')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup8">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::begin_text</span></span>:<br/><a href="5-clt.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::compile_literal_text</span><button class="popup" onclick="togglePopup('usagePopup9')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup9">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::compile_literal_text</span></span>:<br/><a href="5-clt.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generator</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_special_characters</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP14" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">gen</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">literal_text_mode</span><span class="plain-syntax"> == </span><span class="constant-syntax">REGULAR_LTM</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"(I7VAL_STRINGS_BASE + %d)"</span><span class="plain-syntax">, </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">litdata</span><span class="plain-syntax">.</span><span class="element-syntax">text_count</span><span class="plain-syntax">)++);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::new</span><span class="plain-syntax">();</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="5-clt.html#SP5_1" class="named-paragraph-link"><span class="named-paragraph">Compile the text</span><span class="named-paragraph-number">5.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ADD_TO_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax">, </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">litdata</span><span class="plain-syntax">.</span><span class="element-syntax">texts</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="5-clt.html#SP5_1" class="named-paragraph-link"><span class="named-paragraph">Compile the text</span><span class="named-paragraph-number">5.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP5_1" class="paragraph-anchor"></a><b>&#167;5.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Compile the text</span><span class="named-paragraph-number">5.1</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\""</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_special_characters</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="5-clt.html#SP5_1_1" class="named-paragraph-link"><span class="named-paragraph">Print text almost raw</span><span class="named-paragraph-number">5.1.1</span></a></span>
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="5-clt.html#SP5_1_2" class="named-paragraph-link"><span class="named-paragraph">Print text expanding out at, caret and tilde</span><span class="named-paragraph-number">5.1.2</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\""</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="5-clt.html#SP5">&#167;5</a> (twice).</li></ul>
<p class="commentary firstcommentary"><a id="SP5_1_1" class="paragraph-anchor"></a><b>&#167;5.1.1. </b>Tabs become spaces, but there shouldn't be any tabs here anyway; <span class="extract"><span class="extract-syntax">NEWLINE_IN_STRING</span></span>
characters become actual newlines, which is what they mean anyway. Otherwise, though,
this simply prints out the text in a form which a C compiler will accept between
double-quotes.
</p>
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Print text almost raw</span><span class="named-paragraph-number">5.1.1</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">pos</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::get</span><span class="plain-syntax">(</span><span class="identifier-syntax">pos</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'"'</span><span class="plain-syntax">: </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\\\""</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'\\'</span><span class="plain-syntax">: </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\\\\"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'\t'</span><span class="plain-syntax">: </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" "</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'\n'</span><span class="plain-syntax">: </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\\n"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">NEWLINE_IN_STRING:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\\n"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">default:</span><span class="plain-syntax"> </span><span class="identifier-syntax">PUT</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> }</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="5-clt.html#SP5_1">&#167;5.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP5_1_2" class="paragraph-anchor"></a><b>&#167;5.1.2. </b>All of that is true here too, but we also convert the traditional Inform 6
notations for <span class="extract"><span class="extract-syntax">@dd...</span></span> or <span class="extract"><span class="extract-syntax">@{hh...}</span></span> giving character literals in decimal or
hex, and <span class="extract"><span class="extract-syntax">~</span></span> for a double-quote, and <span class="extract"><span class="extract-syntax">^</span></span> for a newline.
</p>
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Print text expanding out at, caret and tilde</span><span class="named-paragraph-number">5.1.2</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax">&lt;</span><span class="identifier-syntax">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">); </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'@'</span><span class="plain-syntax">: {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">+1) == </span><span class="character-syntax">'@'</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">cc</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Characters::isdigit</span><span class="plain-syntax">(</span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, ++</span><span class="identifier-syntax">i</span><span class="plain-syntax">)))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">cc</span><span class="plain-syntax"> = </span><span class="constant-syntax">10</span><span class="plain-syntax">*</span><span class="identifier-syntax">cc</span><span class="plain-syntax"> + (</span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">) - </span><span class="character-syntax">'0'</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">cc</span><span class="plain-syntax"> == </span><span class="character-syntax">'\n'</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">cc</span><span class="plain-syntax"> == </span><span class="character-syntax">'\"'</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">cc</span><span class="plain-syntax"> == </span><span class="character-syntax">'\\'</span><span class="plain-syntax">)) </span><span class="identifier-syntax">PUT</span><span class="plain-syntax">(</span><span class="character-syntax">'\\'</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">PUT</span><span class="plain-syntax">(</span><span class="identifier-syntax">cc</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">--;</span>
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">+1) == </span><span class="character-syntax">'{'</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">cc</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, ++</span><span class="identifier-syntax">i</span><span class="plain-syntax">) != </span><span class="character-syntax">'}'</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">) != </span><span class="constant-syntax">0</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">cc</span><span class="plain-syntax"> = </span><span class="constant-syntax">16</span><span class="plain-syntax">*</span><span class="identifier-syntax">cc</span><span class="plain-syntax"> + </span><a href="5-clt.html#SP6" class="function-link"><span class="function-syntax">CLiteralsModel::hex_val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">cc</span><span class="plain-syntax"> == </span><span class="character-syntax">'\n'</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">cc</span><span class="plain-syntax"> == </span><span class="character-syntax">'\"'</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">cc</span><span class="plain-syntax"> == </span><span class="character-syntax">'\\'</span><span class="plain-syntax">)) </span><span class="identifier-syntax">PUT</span><span class="plain-syntax">(</span><span class="character-syntax">'\\'</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">PUT</span><span class="plain-syntax">(</span><span class="identifier-syntax">cc</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"@"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'~'</span><span class="plain-syntax">: </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'"'</span><span class="plain-syntax">: </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\\\""</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'\\'</span><span class="plain-syntax">: </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\\\\"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'\t'</span><span class="plain-syntax">: </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" "</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'^'</span><span class="plain-syntax">: </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="character-syntax">'\n'</span><span class="plain-syntax">: </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\\n"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">NEWLINE_IN_STRING:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\\n"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">default:</span><span class="plain-syntax"> </span><span class="identifier-syntax">PUT</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> }</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="5-clt.html#SP5_1">&#167;5.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>&#167;6. </b></p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::hex_val</span><button class="popup" onclick="togglePopup('usagePopup10')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup10">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::hex_val</span></span>:<br/><a href="5-clt.html#SP5_1_2">&#167;5.1.2</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax"> &gt;= </span><span class="character-syntax">'0'</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> &lt;= </span><span class="character-syntax">'9'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="character-syntax">'0'</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax"> &gt;= </span><span class="character-syntax">'a'</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> &lt;= </span><span class="character-syntax">'f'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="character-syntax">'a'</span><span class="plain-syntax"> + </span><span class="constant-syntax">10</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax"> &gt;= </span><span class="character-syntax">'A'</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> &lt;= </span><span class="character-syntax">'F'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> - </span><span class="character-syntax">'A'</span><span class="plain-syntax"> + </span><span class="constant-syntax">10</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> -1;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>&#167;7. </b>At the end of the run, when there can be no further texts, we must close
the <span class="extract"><span class="extract-syntax">i7_texts</span></span> array:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::end_text</span><button class="popup" onclick="togglePopup('usagePopup11')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup11">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::end_text</span></span>:<br/><a href="5-clt.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">segmentation_pos</span><span class="plain-syntax"> </span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP12" class="function-link"><span class="function-syntax">CodeGen::select</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="constant-syntax">c_quoted_text_I7CGS</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP14" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"#define i7_mgl_Grammar__Version 2\n"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"char *i7_texts[] = {\n"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax">, </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">litdata</span><span class="plain-syntax">.</span><span class="element-syntax">texts</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%S, "</span><span class="plain-syntax">, </span><span class="identifier-syntax">T</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"\"\" };\n"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-cg.html#SP12" class="function-link"><span class="function-syntax">CodeGen::deselect</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">saved</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::size_of_String_area</span><button class="popup" onclick="togglePopup('usagePopup12')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup12">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::size_of_String_area</span></span>:<br/>C Object Model - <a href="5-com.html#SP4">&#167;4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">litdata</span><span class="plain-syntax">.</span><span class="element-syntax">text_count</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>&#167;8. Action names. </b>These are used when processing changes to the model world in interactive fiction;
they do not exist in Basic Inform programs.
</p>
<p class="commentary">True actions count upwards from 0; fake actions independently count upwards
from 4096. These are defined just as constants, with mangled names:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::new_action</span><button class="popup" onclick="togglePopup('usagePopup13')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup13">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::new_action</span></span>:<br/><a href="5-clt.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generator</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">name</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">true_action</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">true_action</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">segmentation_pos</span><span class="plain-syntax"> </span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP12" class="function-link"><span class="function-syntax">CodeGen::select</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="constant-syntax">c_actions_symbols_I7CGS</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP14" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"#define %S %d\n"</span><span class="plain-syntax">, </span><a href="5-fnc.html#SP7" class="function-link"><span class="function-syntax">CTarget::symbols_header_identifier</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"A"</span><span class="plain-syntax">, </span><span class="identifier-syntax">name</span><span class="plain-syntax">), </span><span class="identifier-syntax">N</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-cg.html#SP12" class="function-link"><span class="function-syntax">CodeGen::deselect</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">saved</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">M</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">, </span><span class="string-syntax">"##%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="5-cnm.html#SP3" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="identifier-syntax">M</span><span class="plain-syntax">, </span><span class="identifier-syntax">O</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">segmentation_pos</span><span class="plain-syntax"> </span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP12" class="function-link"><span class="function-syntax">CodeGen::select</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="constant-syntax">c_actions_I7CGS</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP14" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"#define %S %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">M</span><span class="plain-syntax">, </span><span class="identifier-syntax">N</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-cg.html#SP12" class="function-link"><span class="function-syntax">CodeGen::deselect</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">saved</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">M</span><span class="plain-syntax">)</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>&#167;9. Dictionary words. </b>These are used when parsing command grammar in interactive fiction; they do not
exist in Basic Inform programs.
</p>
<p class="commentary">At runtime, dictionary words are addresses of small fixed-size arrays, and we
have very little flexibility about this because code in CommandParserKit makes
many assumptions about these arrays. So we will closely imitate what the Inform 6
compiler would automatically do.
</p>
<p class="commentary">In the array <span class="extract"><span class="extract-syntax">DW</span></span>, the bytes <span class="extract"><span class="extract-syntax">DW-&gt;1</span></span> to <span class="extract"><span class="extract-syntax">DW-&gt;9</span></span> are the characters of the word,
with trailing nulls padding it out if the word is shorter than that. If it's
longer, then the text is truncated to 9 characters only. This means printing
out the text of a dictionary word is a somewhat faithless operation.<sup id="fnref:1"><a href="#fn:1" rel="footnote">1</a></sup> Still,
Inter provides a primitive to do that, and here is the implementation.
</p>
<ul class="footnotetexts"><li class="footnote" id="fn:1"><p class="inwebfootnote"><sup id="fnref:1"><a href="#fn:1" rel="footnote">1</a></sup> It would get every word in this footnote right except for dictionary, which
would print as dictionar.
<a href="#fnref:1" title="return to text"> &#x21A9;</a></p></li></ul>
<pre class="Extracts-displayed-code all-displayed-code code-font">
<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_print_dword</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7process_t</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">proc</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7word_t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">at</span><span class="Extracts-plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This is part of the extract file inform7_clib.h.</li></ul>
<pre class="Extracts-displayed-code all-displayed-code code-font">
<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_print_dword</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7process_t</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">proc</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7word_t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">at</span><span class="Extracts-plain-syntax">) {</span>
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">for</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">i7byte_t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i</span><span class="Extracts-plain-syntax">=1; </span><span class="Extracts-identifier-syntax">i</span><span class="Extracts-plain-syntax">&lt;=9; </span><span class="Extracts-identifier-syntax">i</span><span class="Extracts-plain-syntax">++) {</span>
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7byte_t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">c</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">i7_read_byte</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">proc</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">at</span><span class="Extracts-plain-syntax">+</span><span class="Extracts-identifier-syntax">i</span><span class="Extracts-plain-syntax">);</span>
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">c</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">break</span><span class="Extracts-plain-syntax">;</span>
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_print_char</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">proc</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">c</span><span class="Extracts-plain-syntax">);</span>
<span class="Extracts-plain-syntax"> }</span>
<span class="Extracts-plain-syntax">}</span>
</pre>
<ul class="endnotetexts"><li>This is part of the extract file inform7_clib.c.</li></ul>
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>&#167;10. </b>We will use the convenient Vanilla mechanism for compiling dictionary words,
so there is very little to do:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CLiteralsModel::compile_dictionary_word</span><button class="popup" onclick="togglePopup('usagePopup14')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup14">Usage of <span class="code-font"><span class="function-syntax">CLiteralsModel::compile_dictionary_word</span></span>:<br/><a href="5-clt.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generator</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">pluralise</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP14" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">vanilla_dword</span><span class="plain-syntax"> *</span><span class="identifier-syntax">dw</span><span class="plain-syntax"> = </span><a href="2-vi.html#SP4" class="function-link"><span class="function-syntax">VanillaIF::text_to_noun_dword</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">pluralise</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="5-cnm.html#SP3" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gtr</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">dw</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">identifier</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
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