group__apr__hash.html

apr函数库使用手册

<p>
Continue iterating over the entries in a hash table. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td></td><td valign=top><em>hi</em>&nbsp;</td><td>The iteration state </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>a pointer to the updated iteration state. NULL if there are no more entries. </dd></dl>
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<a class="anchor" name="ga13" doxytag="apr_hash.h::apr_hash_overlay" ></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="group__apr__hash.html#ga0">apr_hash_t</a>* apr_hash_overlay           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>p</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const <a class="el" href="group__apr__hash.html#ga0">apr_hash_t</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>overlay</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const <a class="el" href="group__apr__hash.html#ga0">apr_hash_t</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>base</em></td>
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          <td class="md">)&nbsp;</td>
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<p>
Merge two hash tables into one new hash table. The values of the overlay hash override the values of the base if both have the same key. Both hash tables must use the same hash function. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td></td><td valign=top><em>p</em>&nbsp;</td><td>The pool to use for the new hash table </td></tr>
    <tr><td></td><td valign=top><em>overlay</em>&nbsp;</td><td>The table to add to the initial table </td></tr>
    <tr><td></td><td valign=top><em>base</em>&nbsp;</td><td>The table that represents the initial values of the new table </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>A new hash table containing all of the data from the two passed in </dd></dl>
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<a class="anchor" name="ga15" doxytag="apr_hash.h::apr_hash_pool_get" ></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a>* apr_hash_pool_get           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const <a class="el" href="group__apr__hash.html#ga0">apr_hash_t</a> *&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>thehash</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Get a pointer to the pool which the hash table was created in     </td>
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<a class="anchor" name="ga7" doxytag="apr_hash.h::apr_hash_set" ></a><p>
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          <td class="md" nowrap valign="top"> void apr_hash_set           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__apr__hash.html#ga0">apr_hash_t</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>ht</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const void *&nbsp;</td>
          <td class="mdname" nowrap> <em>key</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>apr_ssize_t&nbsp;</td>
          <td class="mdname" nowrap> <em>klen</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const void *&nbsp;</td>
          <td class="mdname" nowrap> <em>val</em></td>
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          <td></td>
          <td class="md">)&nbsp;</td>
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<p>
Associate a value with a key in a hash table. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td></td><td valign=top><em>ht</em>&nbsp;</td><td>The hash table </td></tr>
    <tr><td></td><td valign=top><em>key</em>&nbsp;</td><td>Pointer to the key </td></tr>
    <tr><td></td><td valign=top><em>klen</em>&nbsp;</td><td>Length of the key. Can be APR_HASH_KEY_STRING to use the string length. </td></tr>
    <tr><td></td><td valign=top><em>val</em>&nbsp;</td><td>Value to associate with the key </td></tr>
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<dl compact><dt><b>Remarks:</b></dt><dd>If the value is NULL the hash entry is deleted. </dd></dl>
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<a class="anchor" name="ga11" doxytag="apr_hash.h::apr_hash_this" ></a><p>
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          <td class="md" nowrap valign="top"> void apr_hash_this           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__apr__hash.html#ga1">apr_hash_index_t</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>hi</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const void **&nbsp;</td>
          <td class="mdname" nowrap> <em>key</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>apr_ssize_t *&nbsp;</td>
          <td class="mdname" nowrap> <em>klen</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>void **&nbsp;</td>
          <td class="mdname" nowrap> <em>val</em></td>
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          <td></td>
          <td class="md">)&nbsp;</td>
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<p>
Get the current entry's details from the iteration state. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td></td><td valign=top><em>hi</em>&nbsp;</td><td>The iteration state </td></tr>
    <tr><td></td><td valign=top><em>key</em>&nbsp;</td><td>Return pointer for the pointer to the key. </td></tr>
    <tr><td></td><td valign=top><em>klen</em>&nbsp;</td><td>Return pointer for the key length. </td></tr>
    <tr><td></td><td valign=top><em>val</em>&nbsp;</td><td>Return pointer for the associated value. </td></tr>
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<dl compact><dt><b>Remarks:</b></dt><dd>The return pointers should point to a variable that will be set to the corresponding data, or they may be NULL if the data isn't interesting. </dd></dl>
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<a class="anchor" name="ga3" doxytag="apr_hash.h::apr_hashfunc_default" ></a><p>
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          <td class="md" nowrap valign="top"> unsigned int apr_hashfunc_default           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const char *&nbsp;</td>
          <td class="mdname" nowrap> <em>key</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>apr_ssize_t *&nbsp;</td>
          <td class="mdname" nowrap> <em>klen</em></td>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
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<p>
The default hash function.     </td>
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