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Justin Ethier 436a796118 New C API docs
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&#160;<span id="projectnumber">0.28.0</span>
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<h2 class="memtitle"><span class="permalink"><a href="#ga01f75cb3cc09ef87a145e4f1ec5ac5fa">&#9670;&nbsp;</a></span>load_varargs</h2>
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<td class="memname">#define load_varargs</td>
<td>(</td>
<td class="paramtype">&#160;</td>
<td class="paramname">var, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname">args_var, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname">start, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname">count&#160;</td>
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<td>)</td>
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<b>Value:</b><div class="fragment"><div class="line"> <a class="code" href="structpair__type.html">list</a> var = ((count) &gt; 0) ? alloca(<span class="keyword">sizeof</span>(<a class="code" href="structpair__type.html">pair_type</a>)*(count)) : NULL; \</div>
<div class="line"> { \</div>
<div class="line"> int i; \</div>
<div class="line"> object tmp; \</div>
<div class="line"> if ((count) &gt; 0) { \</div>
<div class="line"> for (i = 0; i &lt; (count); i++) { \</div>
<div class="line"> tmp = args_var[start + i]; \</div>
<div class="line"> var[i].hdr.mark = <a class="code" href="group__gc__major_ga4074eefce64a43efc40de89bc9595c9b.html#ga4074eefce64a43efc40de89bc9595c9b">gc_color_red</a>; \</div>
<div class="line"> var[i].hdr.grayed = 0; \</div>
<div class="line"> var[i].hdr.immutable = 0; \</div>
<div class="line"> var[i].tag = <a class="code" href="group__objects_ga3eff9ebd9f241e211e00b991e2ac60fc.html#gga3eff9ebd9f241e211e00b991e2ac60fcafdd0058e320cee16b553162973dc38cc">pair_tag</a>; \</div>
<div class="line"> var[i].pair_car = tmp; \</div>
<div class="line"> var[i].pair_cdr = (i == ((count)-1)) ? NULL : &amp;var[i + 1]; \</div>
<div class="line"> } \</div>
<div class="line"> } \</div>
<div class="line"> }</div>
</div><!-- fragment --><p>Variable argument count support</p>
<p>This macro is intended to be executed at the top of a function that is passed 'var' as a variable-length argument. 'count' is the number of varargs that were passed. EG:</p><ul>
<li>C definition: f(object a, ...)</li>
<li>C call: f(1, 2, 3)</li>
<li>var: a</li>
<li>count: 3</li>
</ul>
<p>Argument count would need to be passed by the caller of f. Presumably our compiler will compute the difference between the number of required args and the number of provided ones, and pass the difference as 'count' </p>
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<div class="ttc" id="agroup__gc__major_ga4074eefce64a43efc40de89bc9595c9b_html_ga4074eefce64a43efc40de89bc9595c9b"><div class="ttname"><a href="group__gc__major_ga4074eefce64a43efc40de89bc9595c9b.html#ga4074eefce64a43efc40de89bc9595c9b">gc_color_red</a></div><div class="ttdeci">#define gc_color_red</div><div class="ttdef"><b>Definition:</b> types.h:297</div></div>
<div class="ttc" id="astructpair__type_html"><div class="ttname"><a href="structpair__type.html">pair_type</a></div><div class="ttdoc">The pair (cons) type.</div><div class="ttdef"><b>Definition:</b> types.h:1247</div></div>
<div class="ttc" id="agroup__objects_ga3eff9ebd9f241e211e00b991e2ac60fc_html_gga3eff9ebd9f241e211e00b991e2ac60fcafdd0058e320cee16b553162973dc38cc"><div class="ttname"><a href="group__objects_ga3eff9ebd9f241e211e00b991e2ac60fc.html#gga3eff9ebd9f241e211e00b991e2ac60fcafdd0058e320cee16b553162973dc38cc">pair_tag</a></div><div class="ttdeci">@ pair_tag</div><div class="ttdef"><b>Definition:</b> types.h:64</div></div>
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