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<!--Weave of 'C Object Model' generated by Inweb-->
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.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 Object Model</b></li></ul></div>
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<p class="purpose">How objects, classes and properties are compiled to C.</p>
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<ul class="toc"><li><a href="5-com.html#SP1">§1. Setting up the model</a></li><li><a href="5-com.html#SP1_1">§1.1. Owners</a></li><li><a href="5-com.html#SP1_2">§1.2. Owner IDs</a></li><li><a href="5-com.html#SP2">§2. Class and instance declarations</a></li><li><a href="5-com.html#SP5">§5. Code to compute ofclass and metaclass</a></li><li><a href="5-com.html#SP6">§6. Property IDs</a></li><li><a href="5-com.html#SP8">§8. Property offsets arrays</a></li><li><a href="5-com.html#SP1_5">§1.5. Property-value initialiser function</a></li><li><a href="5-com.html#SP10">§10. Primitives for property usage</a></li><li><a href="5-com.html#SP11">§11. Reading and writing properties</a></li><li><a href="5-com.html#SP13">§13. Special object-related conditions</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. Setting up the model. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CObjectModel::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">CObjectModel::initialise</span></span>:<br/>Generating C - <a href="5-fnc.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation_target</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="constant-syntax">DECLARE_INSTANCE_MTID</span><span class="plain-syntax">, </span><a href="5-com.html#SP3" class="function-link"><span class="function-syntax">CObjectModel::declare_instance</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="constant-syntax">DECLARE_CLASS_MTID</span><span class="plain-syntax">, </span><a href="5-com.html#SP2" class="function-link"><span class="function-syntax">CObjectModel::declare_class</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="constant-syntax">DECLARE_PROPERTY_MTID</span><span class="plain-syntax">, </span><a href="5-com.html#SP6" class="function-link"><span class="function-syntax">CObjectModel::declare_property</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="constant-syntax">DECLARE_ATTRIBUTE_MTID</span><span class="plain-syntax">, </span><a href="5-com.html#SP6" class="function-link"><span class="function-syntax">CObjectModel::declare_attribute</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="constant-syntax">PROPERTY_OFFSET_MTID</span><span class="plain-syntax">, </span><a href="5-com.html#SP8" class="function-link"><span class="function-syntax">CObjectModel::property_offset</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">METHOD_ADD</span><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="constant-syntax">ASSIGN_PROPERTY_MTID</span><span class="plain-syntax">, </span><a href="5-com.html#SP9" class="function-link"><span class="function-syntax">CObjectModel::assign_property</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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<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_object_model_data</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">owner_id_count</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">C_property_owner</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owners</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">owners_capacity</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">property_id_counter</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">C_property_offsets_made</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">current_owner_id</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">} </span><span class="reserved-syntax">C_generation_object_model_data</span><span class="plain-syntax">;</span>
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<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_property_owner</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">class</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">is_class</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">} </span><span class="reserved-syntax">C_property_owner</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CObjectModel::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">CObjectModel::initialise_data</span></span>:<br/>Generating C - <a href="5-fnc.html#SP4">§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>
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<span class="plain-syntax"> </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">) = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">property_id_counter</span><span class="plain-syntax">) = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">C_property_offsets_made</span><span class="plain-syntax">) = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">) = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners_capacity</span><span class="plain-syntax">) = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CObjectModel::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">CObjectModel::begin</span></span>:<br/>Generating C - <a href="5-fnc.html#SP5">§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>
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<span class="plain-syntax"> </span><a href="5-com.html#SP1" class="function-link"><span class="function-syntax">CObjectModel::initialise_data</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="5-com.html#SP1_5" class="named-paragraph-link"><span class="named-paragraph">Begin the initialiser function</span><span class="named-paragraph-number">1.5</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><a href="5-com.html#SP7" class="function-link"><span class="function-syntax">CObjectModel::declare_property_by_name</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">"value_range"</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CObjectModel::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">CObjectModel::end</span></span>:<br/>Generating C - <a href="5-fnc.html#SP5">§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>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="5-com.html#SP1_6" class="named-paragraph-link"><span class="named-paragraph">Complete the initialiser function</span><span class="named-paragraph-number">1.6</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="5-com.html#SP1_4" class="named-paragraph-link"><span class="named-paragraph">Complete the property-offset creator function</span><span class="named-paragraph-number">1.4</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="5-com.html#SP1_3" class="named-paragraph-link"><span class="named-paragraph">Predeclare the object count and class array</span><span class="named-paragraph-number">1.3</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<ul class="endnotetexts"><li>The structure C_generation_object_model_data is private to this section.</li><li>The structure C_property_owner is private to this section.</li></ul>
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<p class="commentary firstcommentary"><a id="SP1_1" class="paragraph-anchor"></a><b>§1.1. Owners. </b>In this model, every class and every instance are represented by one "owner
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object" each. These owner objects own properties, as we shall see. Each has
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a name, an ID number, and a "class name", which is always the name of another
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owner: except that the owner <span class="extract"><span class="extract-syntax">Class</span></span> has the class name <span class="extract"><span class="extract-syntax">Class</span></span>, i.e., itself.
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</p>
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<p class="commentary">Here we create an owner. They are listed in a dynamically resized array in
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the model data:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CObjectModel::assign_owner</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">CObjectModel::assign_owner</span></span>:<br/><a href="5-com.html#SP2">§2</a>, <a href="5-com.html#SP3">§3</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="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">id</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>
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<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">class_name</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">is_class</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">id</span><span class="plain-syntax"> >= </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners_capacity</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">old_capacity</span><span class="plain-syntax"> = </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners_capacity</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">new_capacity</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax"> * </span><span class="identifier-syntax">old_capacity</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">old_capacity</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">new_capacity</span><span class="plain-syntax"> = </span><span class="constant-syntax">8</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">C_property_owner</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_array</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">new_capacity</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="reserved-syntax">C_property_owner</span><span class="plain-syntax">), </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">));</span>
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<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"><</span><span class="identifier-syntax">old_capacity</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">new_array</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">)[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">old_capacity</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">Memory::I7_array_free</span><span class="plain-syntax">(</span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">, </span><span class="identifier-syntax">old_capacity</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="reserved-syntax">C_property_owner</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">) = </span><span class="identifier-syntax">new_array</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners_capacity</span><span class="plain-syntax">) = </span><span class="identifier-syntax">new_capacity</span><span class="plain-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::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">name</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"nameless instance"</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">)[</span><span class="identifier-syntax">id</span><span class="plain-syntax">].</span><span class="element-syntax">name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::duplicate</span><span class="plain-syntax">(</span><span class="identifier-syntax">name</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">)[</span><span class="identifier-syntax">id</span><span class="plain-syntax">].</span><span class="element-syntax">class</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::duplicate</span><span class="plain-syntax">(</span><span class="identifier-syntax">class_name</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">)[</span><span class="identifier-syntax">id</span><span class="plain-syntax">].</span><span class="element-syntax">is_class</span><span class="plain-syntax"> = </span><span class="identifier-syntax">is_class</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">current_owner_id</span><span class="plain-syntax">) = </span><span class="identifier-syntax">id</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP1_2" class="paragraph-anchor"></a><b>§1.2. Owner IDs. </b>At runtime, an ID number uniquely identifies possible owners of properties.
|
|
The special ID 0 is reserved for <span class="extract"><span class="extract-syntax">nothing</span></span>, meaning the absence of such an
|
|
owner, so we can only use 1 upwards.
|
|
</p>
|
|
|
|
<p class="commentary">The four metaclasses <span class="extract"><span class="extract-syntax">Class</span></span>, <span class="extract"><span class="extract-syntax">Object</span></span>, <span class="extract"><span class="extract-syntax">String</span></span>, <span class="extract"><span class="extract-syntax">Routine</span></span> will get IDs 1
|
|
to 4. Those are not classes in the Inter tree, and must therefore be created
|
|
here as special cases. After that, it's first come, first served.
|
|
</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">CObjectModel::next_owner_id</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">CObjectModel::next_owner_id</span></span>:<br/><a href="5-com.html#SP2">§2</a>, <a href="5-com.html#SP3">§3</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</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_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">) == </span><span class="constant-syntax">1</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP2" class="function-link"><span class="function-syntax">CObjectModel::declare_class_inner</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">"Class"</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"Class"</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">)++;</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP2" class="function-link"><span class="function-syntax">CObjectModel::declare_class_inner</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">"Object"</span><span class="plain-syntax">, </span><span class="constant-syntax">2</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"Class"</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">)++;</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP2" class="function-link"><span class="function-syntax">CObjectModel::declare_class_inner</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">"String"</span><span class="plain-syntax">, </span><span class="constant-syntax">3</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"Class"</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">)++;</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP2" class="function-link"><span class="function-syntax">CObjectModel::declare_class_inner</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">"Routine"</span><span class="plain-syntax">, </span><span class="constant-syntax">4</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"Class"</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">)++;</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP1_3" class="paragraph-anchor"></a><b>§1.3. </b>The (constant) array <span class="extract"><span class="extract-syntax">i7_class_of[id]</span></span> accepts any ID for a class or instance,
|
|
and evaluates to the ID of its classname. So, for example, <span class="extract"><span class="extract-syntax">i7_class_of[1] == 1</span></span>
|
|
expresses that the classname of <span class="extract"><span class="extract-syntax">Class</span></span> is <span class="extract"><span class="extract-syntax">Class</span></span> itself. Here we compile
|
|
a declaration for that array.
|
|
</p>
|
|
|
|
<p class="commentary">ID numbers above our range used for classes and instances are reserved for
|
|
double-quoted literal strings, and then for functions. Thus, each distinct
|
|
literal string, and each distinct function, has an ID; and none of these IDs
|
|
overlap.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Predeclare the object count and class array</span><span class="named-paragraph-number">1.3</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">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" 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_ids_and_maxima_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#SP7" 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_max_objects %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">) + </span><span class="constant-syntax">1</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 i7_metaclass_of[] = { 0"</span><span class="plain-syntax">);</span>
|
|
<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">=1; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><=</span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</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">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">)[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">is_class</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">", i7_mgl_Class"</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">", i7_mgl_Object"</span><span class="plain-syntax">);</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><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7val i7_class_of[] = { 0"</span><span class="plain-syntax">);</span>
|
|
<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">=1; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><=</span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</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">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">", "</span><span class="plain-syntax">); </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">)[</span><span class="identifier-syntax">i</span><span class="plain-syntax">].</span><span class="element-syntax">class</span><span class="plain-syntax">);</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><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"#define I7VAL_STRINGS_BASE %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">) + </span><span class="constant-syntax">1</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 I7VAL_FUNCTIONS_BASE %d\n"</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">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owner_id_count</span><span class="plain-syntax">) + </span><span class="constant-syntax">1</span><span class="plain-syntax"> + </span><a href="5-clt.html#SP4" class="function-link"><span class="function-syntax">CLiteralsModel::no_strings</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_no_property_ids %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">property_id_counter</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" 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>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="5-com.html#SP1">§1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. Class and instance declarations. </b>Each proper base kind in the Inter tree produces an owner as follows:
|
|
</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">CObjectModel::declare_class</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">CObjectModel::declare_class</span></span>:<br/><a href="5-com.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation_target</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cgt</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">class_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">super_class</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::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">super_class</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">super_class</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"Class"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP2" class="function-link"><span class="function-syntax">CObjectModel::declare_class_inner</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">class_name</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP1_2" class="function-link"><span class="function-syntax">CObjectModel::next_owner_id</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">), </span><span class="identifier-syntax">super_class</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">CObjectModel::declare_class_inner</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">CObjectModel::declare_class_inner</span></span>:<br/><a href="5-com.html#SP1_2">§1.2</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">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">class_name</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">id</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">super_class</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP4" class="function-link"><span class="function-syntax">CObjectModel::define_constant_for_owner_id</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">class_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">id</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP1_1" class="function-link"><span class="function-syntax">CObjectModel::assign_owner</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">id</span><span class="plain-syntax">, </span><span class="identifier-syntax">class_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">super_class</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b>And each instance 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">CObjectModel::declare_instance</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">CObjectModel::declare_instance</span></span>:<br/><a href="5-com.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation_target</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cgt</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">class_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">acount</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">is_dir</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::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"nameless instance"</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">id</span><span class="plain-syntax"> = </span><a href="5-com.html#SP1_2" class="function-link"><span class="function-syntax">CObjectModel::next_owner_id</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-com.html#SP4" class="function-link"><span class="function-syntax">CObjectModel::define_constant_for_owner_id</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">id</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP1_1" class="function-link"><span class="function-syntax">CObjectModel::assign_owner</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">id</span><span class="plain-syntax">, </span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">class_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. </b>So it is finally time to compile a <span class="extract"><span class="extract-syntax">#define</span></span> for the owner's identifier,
|
|
defining this as a constant equal to its ID.
|
|
</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">CObjectModel::define_constant_for_owner_id</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">CObjectModel::define_constant_for_owner_id</span></span>:<br/><a href="5-com.html#SP2">§2</a>, <a href="5-com.html#SP3">§3</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="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owner_name</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">id</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" 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_ids_and_maxima_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#SP7" 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 "</span><span class="plain-syntax">); </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">owner_name</span><span class="plain-syntax">); </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">id</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" 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>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. Code to compute ofclass and metaclass. </b>The easier case is metaclass. This is a built-in function, so we make it follow
|
|
the calling conventions of other functions. It says which of five possible values
|
|
an ID belongs to: 0, <span class="extract"><span class="extract-syntax">Class</span></span>, <span class="extract"><span class="extract-syntax">Object</span></span>, <span class="extract"><span class="extract-syntax">String</span></span> or <span class="extract"><span class="extract-syntax">Routine</span></span>.
|
|
</p>
|
|
|
|
<pre class="Extracts-displayed-code all-displayed-code code-font">
|
|
<span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fn_i7_mgl_metaclass</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">n</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">id</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">id</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">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</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">id</span><span class="Extracts-plain-syntax"> >= </span><span class="Extracts-identifier-syntax">I7VAL_FUNCTIONS_BASE</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_mgl_Routine</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">id</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-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_mgl_String</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_metaclass_of</span><span class="Extracts-plain-syntax">[</span><span class="Extracts-identifier-syntax">id</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.h.</li></ul>
|
|
<p class="commentary">This function implements <span class="extract"><span class="Extracts-extract-syntax">OFCLASS_BIP</span></span> for us at runtime, and is a little harder,
|
|
because we may need to recurse up the class hierarchy. If A is of class B whose
|
|
superclass is C, then <span class="extract"><span class="Extracts-extract-syntax">i7_ofclass(A, B)</span></span> and <span class="extract"><span class="Extracts-extract-syntax">i7_ofclass(A, C)</span></span> are both true,
|
|
as it <span class="extract"><span class="Extracts-extract-syntax">i7_ofclass(B, C)</span></span>.
|
|
</p>
|
|
|
|
<pre class="Extracts-displayed-code all-displayed-code code-font">
|
|
<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_ofclass</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">id</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">cl_id</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">id</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">cl_id</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">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</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">id</span><span class="Extracts-plain-syntax"> >= </span><span class="Extracts-identifier-syntax">I7VAL_FUNCTIONS_BASE</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">cl_id</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-identifier-syntax">i7_mgl_Routine</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</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-constant-syntax">0</span><span class="Extracts-plain-syntax">;</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">id</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><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">cl_id</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-identifier-syntax">i7_mgl_String</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</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-constant-syntax">0</span><span class="Extracts-plain-syntax">;</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">id</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-identifier-syntax">i7_mgl_Class</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">cl_id</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-identifier-syntax">i7_mgl_Class</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</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-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> }</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">cl_found</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">i7_class_of</span><span class="Extracts-plain-syntax">[</span><span class="Extracts-identifier-syntax">id</span><span class="Extracts-plain-syntax">];</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">while</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">cl_found</span><span class="Extracts-plain-syntax"> != </span><span class="Extracts-identifier-syntax">i7_mgl_Class</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">cl_id</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-identifier-syntax">cl_found</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">cl_found</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">i7_class_of</span><span class="Extracts-plain-syntax">[</span><span class="Extracts-identifier-syntax">cl_found</span><span class="Extracts-plain-syntax">];</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-constant-syntax">0</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.h.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>§6. Property IDs. </b>Each distinct property has a distinct ID. These count upwards from 0, and can
|
|
freely overlap with owner IDs or anything else.
|
|
</p>
|
|
|
|
<p class="commentary">In Inform 6, owing to the complicated VMs it compiles to, there is a complicated
|
|
distinction between "VM attributes" (some but not all either-or properties) and
|
|
"VM properties" (everything else). But not here.
|
|
</p>
|
|
|
|
<p class="commentary">If a property is never given to anything this is nevertheless called, with <span class="extract"><span class="Extracts-extract-syntax">used</span></span>
|
|
set false, so that a suitable constant is <span class="extract"><span class="Extracts-extract-syntax">#sefine</span></span>d in the code, and therefore
|
|
that references to it will not fail to compile.
|
|
</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">CObjectModel::declare_property</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">CObjectModel::declare_property</span></span>:<br/><a href="5-com.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation_target</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cgt</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">prop_name</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">used</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><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP7" class="function-link"><span class="function-syntax">CObjectModel::declare_property_by_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">name</span><span class="plain-syntax">, </span><span class="identifier-syntax">used</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">CObjectModel::declare_attribute</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">CObjectModel::declare_attribute</span></span>:<br/><a href="5-com.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation_target</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cgt</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">prop_name</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="5-com.html#SP7" class="function-link"><span class="function-syntax">CObjectModel::declare_property_by_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>§7. </b>Property IDs count upwards from 0 in declaration order, though they really
|
|
only need to be unique, so the order is not significant.
|
|
</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">CObjectModel::declare_property_by_name</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">CObjectModel::declare_property_by_name</span></span>:<br/><a href="5-com.html#SP1">§1</a>, <a href="5-com.html#SP6">§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="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">used</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" 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_predeclarations_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#SP7" 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="comment-syntax"> if (used) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"#define "</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">name</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">" %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">property_id_counter</span><span class="plain-syntax">)++);</span>
|
|
<span class="comment-syntax"> } else {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"#ifndef "</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">name</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#define "</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">name</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">" 0\n#endif\n"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">*/</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" 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>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>§8. Property offsets arrays. </b>Here we compile a function which creates arrays of where to find metadata on
|
|
properties at runtime.
|
|
</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">CObjectModel::property_offset</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">CObjectModel::property_offset</span></span>:<br/><a href="5-com.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation_target</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cgt</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">prop</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">pos</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">as_attr</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" 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_property_offset_creator_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#SP7" 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">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">C_property_offsets_made</span><span class="plain-syntax">)++ == </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="5-com.html#SP8_1" class="named-paragraph-link"><span class="named-paragraph">Begin the property-offset creator function</span><span class="named-paragraph-number">8.1</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">"i7_write_word(i7mem, "</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">as_attr</span><span class="plain-syntax">) </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"attributed_property_offsets"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"valued_property_offsets"</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>
|
|
<span class="plain-syntax"> </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">prop</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">", %d, i7_lvalue_SET);\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">pos</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" 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>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8_1" class="paragraph-anchor"></a><b>§8.1. </b>This function is created only if properties actually exist to have offsets;
|
|
that avoids a meaningless function being created in small test runs of <span class="extract"><span class="extract-syntax">inter</span></span>
|
|
not deriving from an Inform program.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Begin the property-offset creator function</span><span class="named-paragraph-number">8.1</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">"i7val fn_i7_mgl_CreatePropertyOffsets(int argc) {\n"</span><span class="plain-syntax">); </span><span class="identifier-syntax">INDENT</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">"for (int i=0; i<i7_mgl_attributed_property_offsets_SIZE; i++)\n"</span><span class="plain-syntax">); </span><span class="identifier-syntax">INDENT</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">"i7_write_word(i7mem, i7_mgl_attributed_property_offsets, i, -1, i7_lvalue_SET);\n"</span><span class="plain-syntax">); </span><span class="identifier-syntax">OUTDENT</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">"for (int i=0; i<i7_mgl_valued_property_offsets_SIZE; i++)\n"</span><span class="plain-syntax">); </span><span class="identifier-syntax">INDENT</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">"i7_write_word(i7mem, i7_mgl_valued_property_offsets, i, -1, i7_lvalue_SET);\n"</span><span class="plain-syntax">); </span><span class="identifier-syntax">OUTDENT</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="5-com.html#SP8">§8</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP1_4" class="paragraph-anchor"></a><b>§1.4. </b>This function has no meaningful return value, but has to conform to our
|
|
calling convention for Inform programs, which means it has to return something.
|
|
By fiat, that will be 0.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Complete the property-offset creator function</span><span class="named-paragraph-number">1.4</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">C_property_offsets_made</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" 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_property_offset_creator_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#SP7" 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">"return 0;\n"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">OUTDENT</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#SP5" 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">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" 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_fundamental_types_I7CGS</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP7" 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">"i7val fn_i7_mgl_CreatePropertyOffsets(int argc);\n"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" 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>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="5-com.html#SP1">§1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP1_5" class="paragraph-anchor"></a><b>§1.5. Property-value initialiser function. </b>When generating code for I6, property values are initialised with direct
|
|
declarations in the I6 language, which tell that compiler to set up a large
|
|
and complicated data structure.
|
|
</p>
|
|
|
|
<p class="commentary">We will not use any of that here, and will not attempt to create static data
|
|
arrays which already have the right contents. Instead we will compile an
|
|
initialiser function which runs early and sets the property values up by hand:
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Begin the initialiser function</span><span class="named-paragraph-number">1.5</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">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" 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_initialiser_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#SP7" 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">"void i7_initializer(void) {\n"</span><span class="plain-syntax">); </span><span class="identifier-syntax">INDENT</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">"for (int id=0; id<i7_max_objects; id++)\n"</span><span class="plain-syntax">); </span><span class="identifier-syntax">INDENT</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">"for (int p=0; p<i7_no_property_ids; p++) {\n"</span><span class="plain-syntax">); </span><span class="identifier-syntax">INDENT</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">"i7_properties[id].value[p] = 0;\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">"if (id == 1) i7_properties[id].value_set[p] = 1;\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">"else i7_properties[id].value_set[p] = 0;\n"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">OUTDENT</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><span class="identifier-syntax">OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" 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>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="5-com.html#SP1">§1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP1_6" class="paragraph-anchor"></a><b>§1.6. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Complete the initialiser function</span><span class="named-paragraph-number">1.6</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">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" 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_initialiser_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#SP7" 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">OUTDENT</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#SP5" 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>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="5-com.html#SP1">§1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>§9. </b>And this function call is compiled to initialise a property value for a given
|
|
owner. Note that it must be called after the owner's declaration call, and before
|
|
the next owner is declared.
|
|
</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">CObjectModel::assign_property</span><button class="popup" onclick="togglePopup('usagePopup15')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup15">Usage of <span class="code-font"><span class="function-syntax">CObjectModel::assign_property</span></span>:<br/><a href="5-com.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation_target</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cgt</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">property_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_stream</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">as_att</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" 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_initialiser_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#SP7" 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>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_write_prop_value("</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">owners</span><span class="plain-syntax">)[</span><span class="identifier-syntax">C_GEN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">objdata</span><span class="plain-syntax">.</span><span class="element-syntax">current_owner_id</span><span class="plain-syntax">)].</span><span class="element-syntax">name</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>
|
|
<span class="plain-syntax"> </span><a href="5-cnm.html#SP1" class="function-link"><span class="function-syntax">CNamespace::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cgt</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">property_name</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);\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" 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>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>§10. Primitives for property usage. </b>The following primitives are all implemented by calling suitable C functions,
|
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which we will then need to write in <span class="extract"><span class="extract-syntax">inform7_clib.h</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
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|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CObjectModel::handle_store_by_ref</span><button class="popup" onclick="togglePopup('usagePopup16')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup16">Usage of <span class="code-font"><span class="function-syntax">CObjectModel::handle_store_by_ref</span></span>:<br/>C References - <a href="5-crf.html#SP4_1">§4.1</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="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ref</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-cal.html#SP3" class="function-link"><span class="function-syntax">CodeGen::CL::node_is_ref_to</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">-></span><span class="element-syntax">from</span><span class="plain-syntax">, </span><span class="identifier-syntax">ref</span><span class="plain-syntax">, </span><span class="identifier-syntax">PROPERTYVALUE_BIP</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax">}</span>
|
|
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|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CObjectModel::compile_primitive</span><button class="popup" onclick="togglePopup('usagePopup17')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup17">Usage of <span class="code-font"><span class="function-syntax">CObjectModel::compile_primitive</span></span>:<br/>C Program Control - <a href="5-cpc.html#SP1">§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="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">bip</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</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#SP7" 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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bip</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">PROPERTYADDRESS_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_prop_addr("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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="constant-syntax">INV_A2</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">PROPERTYLENGTH_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_prop_len("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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="constant-syntax">INV_A2</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="identifier-syntax">PROPERTYVALUE_BIP:</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="5-crf.html#SP3" class="function-link"><span class="function-syntax">CReferences::am_I_a_ref</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">)) {</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_change_prop_value("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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="constant-syntax">INV_A2</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">else</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">"i7_read_prop_value("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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="constant-syntax">INV_A2</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="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">MESSAGE0_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_call_0(i7_read_prop_value("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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><span class="constant-syntax">INV_A2</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="identifier-syntax">MESSAGE1_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_call_1(i7_read_prop_value("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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><span class="constant-syntax">INV_A2</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="constant-syntax">INV_A3</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="identifier-syntax">MESSAGE2_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_call_2(i7_read_prop_value("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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><span class="constant-syntax">INV_A2</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="constant-syntax">INV_A3</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="constant-syntax">INV_A4</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="identifier-syntax">MESSAGE3_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_call_3(i7_read_prop_value("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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><span class="constant-syntax">INV_A2</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="constant-syntax">INV_A3</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="constant-syntax">INV_A4</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="constant-syntax">INV_A5</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="identifier-syntax">GIVE_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_give("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">", 1)"</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">TAKE_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_give("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">", 0)"</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">MOVE_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_move("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</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="constant-syntax">INV_A2</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="identifier-syntax">REMOVE_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"i7_move("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">", 0)"</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="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NOT_APPLICABLE</span><span class="plain-syntax">;</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">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP11" class="paragraph-anchor"></a><b>§11. Reading and writing properties. </b>So here is the run-time storage for property values, and simple code to read
|
|
and write them. Note that, unlike in the Z-machine or Glulx implementations,
|
|
property values are not stored in the memory map.
|
|
</p>
|
|
|
|
<pre class="Extracts-displayed-code all-displayed-code code-font">
|
|
<span class="Extracts-identifier-syntax">typedef</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">struct</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_property_set</span><span class="Extracts-plain-syntax"> {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">value</span><span class="Extracts-plain-syntax">[</span><span class="Extracts-identifier-syntax">i7_no_property_ids</span><span class="Extracts-plain-syntax">];</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">value_set</span><span class="Extracts-plain-syntax">[</span><span class="Extracts-identifier-syntax">i7_no_property_ids</span><span class="Extracts-plain-syntax">];</span>
|
|
<span class="Extracts-plain-syntax">} </span><span class="Extracts-identifier-syntax">i7_property_set</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-identifier-syntax">i7_property_set</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_properties</span><span class="Extracts-plain-syntax">[</span><span class="Extracts-identifier-syntax">i7_max_objects</span><span class="Extracts-plain-syntax">];</span>
|
|
|
|
<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_write_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">prop_id</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">val</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">owner_id</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">owner_id</span><span class="Extracts-plain-syntax"> >= </span><span class="Extracts-identifier-syntax">i7_max_objects</span><span class="Extracts-plain-syntax">) ||</span>
|
|
<span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">prop_id</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">prop_id</span><span class="Extracts-plain-syntax"> >= </span><span class="Extracts-identifier-syntax">i7_no_property_ids</span><span class="Extracts-plain-syntax">)) {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">printf</span><span class="Extracts-plain-syntax">("</span><span class="Extracts-identifier-syntax">impossible</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">property</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">write</span><span class="Extracts-plain-syntax"> (%</span><span class="Extracts-identifier-syntax">d</span><span class="Extracts-plain-syntax">, %</span><span class="Extracts-identifier-syntax">d</span><span class="Extracts-plain-syntax">)\</span><span class="Extracts-identifier-syntax">n</span><span class="Extracts-plain-syntax">", </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">prop_id</span><span class="Extracts-plain-syntax">);</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">exit</span><span class="Extracts-plain-syntax">(1);</span>
|
|
<span class="Extracts-plain-syntax"> }</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_properties</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">].</span><span class="Extracts-identifier-syntax">value</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">prop_id</span><span class="Extracts-plain-syntax">] = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_properties</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">].</span><span class="Extracts-identifier-syntax">value_set</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">prop_id</span><span class="Extracts-plain-syntax">] = </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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</pre>
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<ul class="endnotetexts"><li>This is part of the extract file inform7_clib.h.</li></ul>
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<p class="commentary firstcommentary"><a id="SP12" class="paragraph-anchor"></a><b>§12. </b>And here sre the functions called by the above primitives:
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</p>
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<pre class="Extracts-displayed-code all-displayed-code code-font">
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<span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_read_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">prop_id</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> ((</span><span class="Extracts-identifier-syntax">owner_id</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">owner_id</span><span class="Extracts-plain-syntax"> >= </span><span class="Extracts-identifier-syntax">i7_max_objects</span><span class="Extracts-plain-syntax">) ||</span>
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<span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">prop_id</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">prop_id</span><span class="Extracts-plain-syntax"> >= </span><span class="Extracts-identifier-syntax">i7_no_property_ids</span><span class="Extracts-plain-syntax">)) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">while</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">i7_properties</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">].</span><span class="Extracts-identifier-syntax">value_set</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">prop_id</span><span class="Extracts-plain-syntax">] == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">i7_class_of</span><span class="Extracts-plain-syntax">[</span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">];</span>
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<span class="Extracts-plain-syntax"> }</span>
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<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_properties</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">].</span><span class="Extracts-identifier-syntax">value</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">prop_id</span><span class="Extracts-plain-syntax">];</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_change_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">to</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">way</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">i7_read_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">), </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">switch</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">way</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">case</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_lvalue_SET</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">i7_write_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">to</span><span class="Extracts-plain-syntax">); </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">to</span><span class="Extracts-plain-syntax">; </span><span class="Extracts-identifier-syntax">break</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">case</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_lvalue_PREDEC</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">; </span><span class="Extracts-identifier-syntax">i7_write_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">-1); </span><span class="Extracts-identifier-syntax">break</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">case</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_lvalue_POSTDEC</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">-1; </span><span class="Extracts-identifier-syntax">i7_write_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax">); </span><span class="Extracts-identifier-syntax">break</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">case</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_lvalue_PREINC</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">; </span><span class="Extracts-identifier-syntax">i7_write_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">+1); </span><span class="Extracts-identifier-syntax">break</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">case</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_lvalue_POSTINC</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">+1; </span><span class="Extracts-identifier-syntax">i7_write_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax">); </span><span class="Extracts-identifier-syntax">break</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">case</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_lvalue_SETBIT</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax"> | </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax">; </span><span class="Extracts-identifier-syntax">i7_write_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax">); </span><span class="Extracts-identifier-syntax">break</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">case</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_lvalue_CLEARBIT</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax"> &(~</span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax">); </span><span class="Extracts-identifier-syntax">i7_write_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax">); </span><span class="Extracts-identifier-syntax">break</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> }</span>
|
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">new_val</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_give</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">owner</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">prop</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_write_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">owner</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">prop</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">);</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
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<span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_prop_len</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">) {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">printf</span><span class="Extracts-plain-syntax">("</span><span class="Extracts-identifier-syntax">Unimplemented</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">i7_prop_len</span><span class="Extracts-plain-syntax">.\</span><span class="Extracts-identifier-syntax">n</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-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
|
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<span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_prop_addr</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">pr</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">printf</span><span class="Extracts-plain-syntax">("</span><span class="Extracts-identifier-syntax">Unimplemented</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">i7_prop_addr</span><span class="Extracts-plain-syntax">.\</span><span class="Extracts-identifier-syntax">n</span><span class="Extracts-plain-syntax">");</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_move</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">to</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">printf</span><span class="Extracts-plain-syntax">("</span><span class="Extracts-identifier-syntax">Unimplemented</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">i7_move</span><span class="Extracts-plain-syntax">.\</span><span class="Extracts-identifier-syntax">n</span><span class="Extracts-plain-syntax">");</span>
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<span class="Extracts-plain-syntax">}</span>
|
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</pre>
|
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<ul class="endnotetexts"><li>This is part of the extract file inform7_clib.h.</li></ul>
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<p class="commentary firstcommentary"><a id="SP13" class="paragraph-anchor"></a><b>§13. Special object-related conditions. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="function-syntax">CObjectModel::test_with_function</span><button class="popup" onclick="togglePopup('usagePopup18')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup18">Usage of <span class="code-font"><span class="function-syntax">CObjectModel::test_with_function</span></span>:<br/>C Conditions - <a href="5-ccn.html#SP2">§2</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">bip</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">positive</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bip</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">OFCLASS_BIP:</span><span class="plain-syntax"> *</span><span class="identifier-syntax">positive</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="string-syntax">"i7_ofclass"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">HAS_BIP:</span><span class="plain-syntax"> *</span><span class="identifier-syntax">positive</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="string-syntax">"i7_has"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">HASNT_BIP:</span><span class="plain-syntax"> *</span><span class="identifier-syntax">positive</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">; </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="string-syntax">"i7_has"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">IN_BIP:</span><span class="plain-syntax"> *</span><span class="identifier-syntax">positive</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="string-syntax">"i7_in"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">NOTIN_BIP:</span><span class="plain-syntax"> *</span><span class="identifier-syntax">positive</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">; </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="string-syntax">"i7_in"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">PROVIDES_BIP:</span><span class="plain-syntax"> *</span><span class="identifier-syntax">positive</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="string-syntax">"i7_provides"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> *</span><span class="identifier-syntax">positive</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NOT_APPLICABLE</span><span class="plain-syntax">; </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP14" class="paragraph-anchor"></a><b>§14. </b></p>
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<pre class="Extracts-displayed-code all-displayed-code code-font">
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<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_has</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">attr</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">i7_read_prop_value</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">obj</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">attr</span><span class="Extracts-plain-syntax">)) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_provides</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">prop_id</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> ((</span><span class="Extracts-identifier-syntax">owner_id</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">owner_id</span><span class="Extracts-plain-syntax"> >= </span><span class="Extracts-identifier-syntax">i7_max_objects</span><span class="Extracts-plain-syntax">) ||</span>
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<span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">prop_id</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">prop_id</span><span class="Extracts-plain-syntax"> >= </span><span class="Extracts-identifier-syntax">i7_no_property_ids</span><span class="Extracts-plain-syntax">)) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">while</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax"> != </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">i7_properties</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">].</span><span class="Extracts-identifier-syntax">value_set</span><span class="Extracts-plain-syntax">[(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">prop_id</span><span class="Extracts-plain-syntax">] == </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">)</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">i7_class_of</span><span class="Extracts-plain-syntax">[</span><span class="Extracts-identifier-syntax">owner_id</span><span class="Extracts-plain-syntax">];</span>
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<span class="Extracts-plain-syntax"> }</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_in</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">obj1</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">obj2</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">printf</span><span class="Extracts-plain-syntax">("</span><span class="Extracts-identifier-syntax">Unimplemented</span><span class="Extracts-plain-syntax">: </span><span class="Extracts-identifier-syntax">i7_in</span><span class="Extracts-plain-syntax">.\</span><span class="Extracts-identifier-syntax">n</span><span class="Extracts-plain-syntax">");</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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</pre>
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<ul class="endnotetexts"><li>This is part of the extract file inform7_clib.h.</li></ul>
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