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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>libusual: usual/hashtab-impl.h File Reference</title>
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<a href="#nested-classes">Data Structures</a> |
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<p>Simple customizable hashtable implementation.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_hash_item.html">HashItem</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><a class="el" href="struct_hash_tab.html" title="Single HashTab segment.">HashTab</a> slot. <a href="struct_hash_item.html#details">More...</a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_hash_tab.html">HashTab</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Single <a class="el" href="struct_hash_tab.html" title="Single HashTab segment.">HashTab</a> segment. <a href="struct_hash_tab.html#details">More...</a><br/></td></tr>
<tr><td colspan="2"><h2><a name="define-members"></a>
Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a24605ab6be02cb5452cefca17116ea54">HTAB_KEY_T</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Overridable type for key. <a href="#a24605ab6be02cb5452cefca17116ea54"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#aa6c9d77fed4c88bf60c67ad97226c138">HTAB_VAL_T</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Overridable type for value. <a href="#aa6c9d77fed4c88bf60c67ad97226c138"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#aad968df3bf7ec4579616118dfb45e77a">HTAB_MAX_FILL</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Max fill percentage. <a href="#aad968df3bf7ec4579616118dfb45e77a"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="hashtab-impl_8h.html#a24605ab6be02cb5452cefca17116ea54">HTAB_KEY_T</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a385a2461ac9edf9731028799a95468bf">htab_key_t</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Typedef for key. <a href="#a385a2461ac9edf9731028799a95468bf"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="hashtab-impl_8h.html#aa6c9d77fed4c88bf60c67ad97226c138">HTAB_VAL_T</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a84f65bc167579c2087fd0df5a52435b1">htab_val_t</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Typedef for value. <a href="#a84f65bc167579c2087fd0df5a52435b1"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef bool(* </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a4375b1b7c2d66f269b417aaa1ca8f257">hash_cmp_fn</a> )(const <a class="el" href="hashtab-impl_8h.html#a84f65bc167579c2087fd0df5a52435b1">htab_val_t</a> curval, const void *arg)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Signature for comparision function. <a href="#a4375b1b7c2d66f269b417aaa1ca8f257"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static struct <a class="el" href="struct_hash_tab.html">HashTab</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a9e99cc90ac0a0fe159e48b4b86ae26aa">hashtab_create</a> (unsigned size, <a class="el" href="hashtab-impl_8h.html#a4375b1b7c2d66f269b417aaa1ca8f257">hash_cmp_fn</a> cmp_fn, <a class="el" href="struct_cx_mem.html">CxMem</a> *ca)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Initialize <a class="el" href="struct_hash_tab.html" title="Single HashTab segment.">HashTab</a>. <a href="#a9e99cc90ac0a0fe159e48b4b86ae26aa"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a4ace547e0fd8c894a0cd95c8c452352b">hashtab_destroy</a> (struct <a class="el" href="struct_hash_tab.html">HashTab</a> *h)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Free <a class="el" href="struct_hash_tab.html" title="Single HashTab segment.">HashTab</a>. <a href="#a4ace547e0fd8c894a0cd95c8c452352b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="el" href="hashtab-impl_8h.html#a84f65bc167579c2087fd0df5a52435b1">htab_val_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a30d6d65c4a87148f0ef82a935dfc331c">hashtab_lookup</a> (struct <a class="el" href="struct_hash_tab.html">HashTab</a> *h, <a class="el" href="hashtab-impl_8h.html#a385a2461ac9edf9731028799a95468bf">htab_key_t</a> key, bool do_insert, const void *arg)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Element lookup, optionally inserting new slot. <a href="#a30d6d65c4a87148f0ef82a935dfc331c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a73be4302ca9a85f10c80614553791ccb">hashtab_delete</a> (struct <a class="el" href="struct_hash_tab.html">HashTab</a> *h, <a class="el" href="hashtab-impl_8h.html#a385a2461ac9edf9731028799a95468bf">htab_key_t</a> key, void *arg)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Delete an element. <a href="#a73be4302ca9a85f10c80614553791ccb"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a40d580e2ce7453b4c1a9b63921ad5dec">hashtab_stats</a> (struct <a class="el" href="struct_hash_tab.html">HashTab</a> *h, unsigned *nitem_p, unsigned *ntab_p)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Count elements and fragments. <a href="#a40d580e2ce7453b4c1a9b63921ad5dec"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static struct <a class="el" href="struct_hash_tab.html">HashTab</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="hashtab-impl_8h.html#a2405f62b248cc3f85fbb5540df190138">hashtab_copy</a> (struct <a class="el" href="struct_hash_tab.html">HashTab</a> *h_old, unsigned newsize)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Copy elements to new hashtab, perhaps with different size. <a href="#a2405f62b248cc3f85fbb5540df190138"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Simple customizable hashtable implementation. </p>
<ul>
<li>Fixed-size hash table, open-addressed</li>
<li>Extended by linking several together</li>
<li>Resizable by copying.</li>
<li>Can be lockless in multi-reader, one-writer situation if mempory barrier macros are defined. This also requires that <a class="el" href="struct_hash_item.html" title="HashTab slot.">HashItem</a> must not be split across cachelines. </li>
</ul>
</div><hr/><h2>Define Documentation</h2>
<a class="anchor" id="a24605ab6be02cb5452cefca17116ea54"></a><!-- doxytag: member="hashtab-impl.h::HTAB_KEY_T" ref="a24605ab6be02cb5452cefca17116ea54" args="" -->
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<td class="memname">#define <a class="el" href="hashtab-impl_8h.html#a24605ab6be02cb5452cefca17116ea54">HTAB_KEY_T</a></td>
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</table>
</div>
<div class="memdoc">
<p>Overridable type for key. </p>
</div>
</div>
<a class="anchor" id="aa6c9d77fed4c88bf60c67ad97226c138"></a><!-- doxytag: member="hashtab-impl.h::HTAB_VAL_T" ref="aa6c9d77fed4c88bf60c67ad97226c138" args="" -->
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<td class="memname">#define <a class="el" href="hashtab-impl_8h.html#aa6c9d77fed4c88bf60c67ad97226c138">HTAB_VAL_T</a></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Overridable type for value. </p>
</div>
</div>
<a class="anchor" id="aad968df3bf7ec4579616118dfb45e77a"></a><!-- doxytag: member="hashtab-impl.h::HTAB_MAX_FILL" ref="aad968df3bf7ec4579616118dfb45e77a" args="" -->
<div class="memitem">
<div class="memproto">
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<td class="memname">#define <a class="el" href="hashtab-impl_8h.html#aad968df3bf7ec4579616118dfb45e77a">HTAB_MAX_FILL</a></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Max fill percentage. </p>
</div>
</div>
<hr/><h2>Typedef Documentation</h2>
<a class="anchor" id="a385a2461ac9edf9731028799a95468bf"></a><!-- doxytag: member="hashtab-impl.h::htab_key_t" ref="a385a2461ac9edf9731028799a95468bf" args="" -->
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<td class="memname">typedef <a class="el" href="hashtab-impl_8h.html#a24605ab6be02cb5452cefca17116ea54">HTAB_KEY_T</a> <a class="el" href="hashtab-impl_8h.html#a385a2461ac9edf9731028799a95468bf">htab_key_t</a></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Typedef for key. </p>
</div>
</div>
<a class="anchor" id="a84f65bc167579c2087fd0df5a52435b1"></a><!-- doxytag: member="hashtab-impl.h::htab_val_t" ref="a84f65bc167579c2087fd0df5a52435b1" args="" -->
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<td class="memname">typedef <a class="el" href="hashtab-impl_8h.html#aa6c9d77fed4c88bf60c67ad97226c138">HTAB_VAL_T</a> <a class="el" href="hashtab-impl_8h.html#a84f65bc167579c2087fd0df5a52435b1">htab_val_t</a></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Typedef for value. </p>
</div>
</div>
<a class="anchor" id="a4375b1b7c2d66f269b417aaa1ca8f257"></a><!-- doxytag: member="hashtab-impl.h::hash_cmp_fn" ref="a4375b1b7c2d66f269b417aaa1ca8f257" args=")(const htab_val_t curval, const void *arg)" -->
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<td class="memname">typedef bool(* <a class="el" href="hashtab-impl_8h.html#a4375b1b7c2d66f269b417aaa1ca8f257">hash_cmp_fn</a>)(const <a class="el" href="hashtab-impl_8h.html#a84f65bc167579c2087fd0df5a52435b1">htab_val_t</a> curval, const void *arg)</td>
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<p>Signature for comparision function. </p>
</div>
</div>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="a9e99cc90ac0a0fe159e48b4b86ae26aa"></a><!-- doxytag: member="hashtab-impl.h::hashtab_create" ref="a9e99cc90ac0a0fe159e48b4b86ae26aa" args="(unsigned size, hash_cmp_fn cmp_fn, CxMem *ca)" -->
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<td class="memname">static struct <a class="el" href="struct_hash_tab.html">HashTab</a>* <a class="el" href="hashtab-impl_8h.html#a9e99cc90ac0a0fe159e48b4b86ae26aa">hashtab_create</a> </td>
<td>(</td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="hashtab-impl_8h.html#a4375b1b7c2d66f269b417aaa1ca8f257">hash_cmp_fn</a> </td>
<td class="paramname"><em>cmp_fn</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_cx_mem.html">CxMem</a> * </td>
<td class="paramname"><em>ca</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td><code> [static, read]</code></td>
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<div class="memdoc">
<p>Initialize <a class="el" href="struct_hash_tab.html" title="Single HashTab segment.">HashTab</a>. </p>
<p>References <a class="el" href="cxalloc_8h.html#aba9810d5b22aedfda47bb5cb89a7a7e9">cx_alloc0()</a>.</p>
<p>Referenced by <a class="el" href="hashtab-impl_8h.html#a2405f62b248cc3f85fbb5540df190138">hashtab_copy()</a>, and <a class="el" href="hashtab-impl_8h.html#a30d6d65c4a87148f0ef82a935dfc331c">hashtab_lookup()</a>.</p>
</div>
</div>
<a class="anchor" id="a4ace547e0fd8c894a0cd95c8c452352b"></a><!-- doxytag: member="hashtab-impl.h::hashtab_destroy" ref="a4ace547e0fd8c894a0cd95c8c452352b" args="(struct HashTab *h)" -->
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<td class="memname">static void <a class="el" href="hashtab-impl_8h.html#a4ace547e0fd8c894a0cd95c8c452352b">hashtab_destroy</a> </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="struct_hash_tab.html">HashTab</a> * </td>
<td class="paramname"><em>h</em></td><td>)</td>
<td><code> [static]</code></td>
</tr>
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<div class="memdoc">
<p>Free <a class="el" href="struct_hash_tab.html" title="Single HashTab segment.">HashTab</a>. </p>
<p>References <a class="el" href="cxalloc_8h.html#a4f164c826ae312bbf68fc784066db6ac">cx_free()</a>.</p>
<p>Referenced by <a class="el" href="hashtab-impl_8h.html#a2405f62b248cc3f85fbb5540df190138">hashtab_copy()</a>.</p>
</div>
</div>
<a class="anchor" id="a30d6d65c4a87148f0ef82a935dfc331c"></a><!-- doxytag: member="hashtab-impl.h::hashtab_lookup" ref="a30d6d65c4a87148f0ef82a935dfc331c" args="(struct HashTab *h, htab_key_t key, bool do_insert, const void *arg)" -->
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<td class="memname">static <a class="el" href="hashtab-impl_8h.html#a84f65bc167579c2087fd0df5a52435b1">htab_val_t</a>* <a class="el" href="hashtab-impl_8h.html#a30d6d65c4a87148f0ef82a935dfc331c">hashtab_lookup</a> </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="struct_hash_tab.html">HashTab</a> * </td>
<td class="paramname"><em>h</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="hashtab-impl_8h.html#a385a2461ac9edf9731028799a95468bf">htab_key_t</a> </td>
<td class="paramname"><em>key</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>do_insert</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const void * </td>
<td class="paramname"><em>arg</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
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<div class="memdoc">
<p>Element lookup, optionally inserting new slot. </p>
<p>References <a class="el" href="hashtab-impl_8h.html#a9e99cc90ac0a0fe159e48b4b86ae26aa">hashtab_create()</a>.</p>
<p>Referenced by <a class="el" href="hashtab-impl_8h.html#a2405f62b248cc3f85fbb5540df190138">hashtab_copy()</a>, and <a class="el" href="hashtab-impl_8h.html#a73be4302ca9a85f10c80614553791ccb">hashtab_delete()</a>.</p>
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<a class="anchor" id="a73be4302ca9a85f10c80614553791ccb"></a><!-- doxytag: member="hashtab-impl.h::hashtab_delete" ref="a73be4302ca9a85f10c80614553791ccb" args="(struct HashTab *h, htab_key_t key, void *arg)" -->
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<div class="memproto">
<table class="memname">
<tr>
<td class="memname">static void <a class="el" href="hashtab-impl_8h.html#a73be4302ca9a85f10c80614553791ccb">hashtab_delete</a> </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="struct_hash_tab.html">HashTab</a> * </td>
<td class="paramname"><em>h</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="hashtab-impl_8h.html#a385a2461ac9edf9731028799a95468bf">htab_key_t</a> </td>
<td class="paramname"><em>key</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"><em>arg</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
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<div class="memdoc">
<p>Delete an element. </p>
<p>References <a class="el" href="base_8h.html#a9811c6fb466ff1d04ff9052422edb9fe">container_of</a>, and <a class="el" href="hashtab-impl_8h.html#a30d6d65c4a87148f0ef82a935dfc331c">hashtab_lookup()</a>.</p>
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<a class="anchor" id="a40d580e2ce7453b4c1a9b63921ad5dec"></a><!-- doxytag: member="hashtab-impl.h::hashtab_stats" ref="a40d580e2ce7453b4c1a9b63921ad5dec" args="(struct HashTab *h, unsigned *nitem_p, unsigned *ntab_p)" -->
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<td class="memname">static void <a class="el" href="hashtab-impl_8h.html#a40d580e2ce7453b4c1a9b63921ad5dec">hashtab_stats</a> </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="struct_hash_tab.html">HashTab</a> * </td>
<td class="paramname"><em>h</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned * </td>
<td class="paramname"><em>nitem_p</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned * </td>
<td class="paramname"><em>ntab_p</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td><code> [static]</code></td>
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<div class="memdoc">
<p>Count elements and fragments. </p>
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<a class="anchor" id="a2405f62b248cc3f85fbb5540df190138"></a><!-- doxytag: member="hashtab-impl.h::hashtab_copy" ref="a2405f62b248cc3f85fbb5540df190138" args="(struct HashTab *h_old, unsigned newsize)" -->
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<div class="memproto">
<table class="memname">
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<td class="memname">static struct <a class="el" href="struct_hash_tab.html">HashTab</a>* <a class="el" href="hashtab-impl_8h.html#a2405f62b248cc3f85fbb5540df190138">hashtab_copy</a> </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="struct_hash_tab.html">HashTab</a> * </td>
<td class="paramname"><em>h_old</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned </td>
<td class="paramname"><em>newsize</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td><code> [static, read]</code></td>
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<div class="memdoc">
<p>Copy elements to new hashtab, perhaps with different size. </p>
<p>References <a class="el" href="err_8h.html#a0df8e22060394f874297ccbceacae0a3">err()</a>, <a class="el" href="hashtab-impl_8h.html#a9e99cc90ac0a0fe159e48b4b86ae26aa">hashtab_create()</a>, <a class="el" href="hashtab-impl_8h.html#a4ace547e0fd8c894a0cd95c8c452352b">hashtab_destroy()</a>, and <a class="el" href="hashtab-impl_8h.html#a30d6d65c4a87148f0ef82a935dfc331c">hashtab_lookup()</a>.</p>
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