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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">building</a></li><li><a href="index.html#3">Chapter 3: Masonry</a></li><li><b>Value Holsters</b></li></ul></div>
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<p class="purpose">To manage requests for compilation to Inter.</p>
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<ul class="toc"><li><a href="3-vh.html#SP3">§3. Conversions</a></li><li><a href="3-vh.html#SP4">§4. Holstering data</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b></p>
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<pre class="definitions code-font"><span class="definition-keyword">enum</span> <span class="constant-syntax">INTER_DATA_VHMODE</span><span class="plain-syntax"> </span><span class="identifier-syntax">from</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span>
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<span class="definition-keyword">enum</span> <span class="constant-syntax">INTER_VAL_VHMODE</span>
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<span class="definition-keyword">enum</span> <span class="constant-syntax">INTER_VOID_VHMODE</span>
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<span class="definition-keyword">enum</span> <span class="constant-syntax">NO_VHMODE</span>
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</pre>
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<pre class="displayed-code all-displayed-code code-font">
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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">value_holster</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">vhmode_wanted</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">vhmode_provided</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">val1</span><span class="plain-syntax">, </span><span class="identifier-syntax">val2</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">} </span><span class="reserved-syntax">value_holster</span><span class="plain-syntax">;</span>
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</pre>
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<ul class="endnotetexts"><li>The structure value_holster is accessed in 2/eis and here.</li></ul>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">value_holster</span><span class="plain-syntax"> </span><span class="function-syntax">Holsters::new</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">Holsters::new</span></span>:<br/>Emitting Inter Schemas - <a href="2-eis.html#SP3_1">§3.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">vhm</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">value_holster</span><span class="plain-syntax"> </span><span class="identifier-syntax">vh</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">vh</span><span class="plain-syntax">.</span><span class="element-syntax">val1</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">vh</span><span class="plain-syntax">.</span><span class="identifier-syntax">val2</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">vh</span><span class="plain-syntax">.</span><span class="element-syntax">vhmode_wanted</span><span class="plain-syntax"> = </span><span class="identifier-syntax">vhm</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">vh</span><span class="plain-syntax">.</span><span class="element-syntax">vhmode_provided</span><span class="plain-syntax"> = </span><span class="constant-syntax">NO_VHMODE</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">vhm</span><span class="plain-syntax"> == </span><span class="constant-syntax">NO_VHMODE</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"can't want NO_VHMODE"</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">vh</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="SP3" class="paragraph-anchor"></a><b>§3. Conversions. </b></p>
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<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">Holsters::non_void_context</span><span class="plain-syntax">(</span><span class="reserved-syntax">value_holster</span><span class="plain-syntax"> *</span><span class="identifier-syntax">vh</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">vh</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"no VH"</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">vh</span><span class="plain-syntax">-></span><span class="element-syntax">vhmode_wanted</span><span class="plain-syntax"> == </span><span class="constant-syntax">INTER_DATA_VHMODE</span><span class="plain-syntax">) ||</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="element-syntax">vhmode_wanted</span><span class="plain-syntax"> == </span><span class="constant-syntax">INTER_VAL_VHMODE</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">void</span><span class="plain-syntax"> </span><span class="function-syntax">Holsters::unholster_to_code_val</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="reserved-syntax">value_holster</span><span class="plain-syntax"> *</span><span class="identifier-syntax">vh</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">vh</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"no VH"</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">vh</span><span class="plain-syntax">-></span><span class="element-syntax">vhmode_provided</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">INTER_DATA_VHMODE:</span>
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<span class="plain-syntax"> </span><a href="3-prd.html#SP3" class="function-link"><span class="function-syntax">Produce::val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_value</span><span class="plain-syntax">, </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="element-syntax">val1</span><span class="plain-syntax">, </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="identifier-syntax">val2</span><span class="plain-syntax">);</span>
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<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">INTER_VOID_VHMODE:</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"impossible conversion"</span><span class="plain-syntax">);</span>
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<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">NO_VHMODE:</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="element-syntax">val1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">LITERAL_IVAL</span><span class="plain-syntax">; </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="identifier-syntax">val2</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><a href="3-prd.html#SP3" class="function-link"><span class="function-syntax">Produce::val</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_value</span><span class="plain-syntax">, </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="element-syntax">val1</span><span class="plain-syntax">, </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="identifier-syntax">val2</span><span class="plain-syntax">);</span>
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<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">vh</span><span class="plain-syntax">-></span><span class="element-syntax">vhmode_provided</span><span class="plain-syntax"> = </span><span class="constant-syntax">INTER_VAL_VHMODE</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="SP4" class="paragraph-anchor"></a><b>§4. Holstering data. </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">Holsters::holster_pair</span><span class="plain-syntax">(</span><span class="reserved-syntax">value_holster</span><span class="plain-syntax"> *</span><span class="identifier-syntax">vh</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">v1</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">v2</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">vh</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"no VH"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="element-syntax">val1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">v1</span><span class="plain-syntax">; </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="identifier-syntax">val2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">v2</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="element-syntax">vhmode_provided</span><span class="plain-syntax"> = </span><span class="constant-syntax">INTER_DATA_VHMODE</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">Holsters::unholster_pair</span><span class="plain-syntax">(</span><span class="reserved-syntax">value_holster</span><span class="plain-syntax"> *</span><span class="identifier-syntax">vh</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> *</span><span class="identifier-syntax">v1</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> *</span><span class="identifier-syntax">v2</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">vh</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"no VH"</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">vh</span><span class="plain-syntax">-></span><span class="element-syntax">vhmode_provided</span><span class="plain-syntax"> != </span><span class="constant-syntax">INTER_DATA_VHMODE</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">vh</span><span class="plain-syntax">-></span><span class="element-syntax">vhmode_provided</span><span class="plain-syntax"> != </span><span class="constant-syntax">NO_VHMODE</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">problem_count</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">"errant DV"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="element-syntax">val1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">LITERAL_IVAL</span><span class="plain-syntax">; </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="identifier-syntax">val2</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">vh</span><span class="plain-syntax">-></span><span class="element-syntax">vhmode_provided</span><span class="plain-syntax"> = </span><span class="constant-syntax">INTER_DATA_VHMODE</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">v1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="element-syntax">val1</span><span class="plain-syntax">; *</span><span class="identifier-syntax">v2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">vh</span><span class="plain-syntax">-></span><span class="identifier-syntax">val2</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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