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<a href="dkhash_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef LIBNAGIOS_DKHASH_H_INCLUDED</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor"></span><span class="preprocessor">#define LIBNAGIOS_DKHASH_H_INCLUDED</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="preprocessor"></span><span class="preprocessor">#include <errno.h></span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"></span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * @file dkhash.h</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * @brief Dual-key hash functions for Nagios</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * Having a dual-key hash function is pretty unusual, but since so</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * much data in Nagios pertains to services (which are uniquely</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * identified based on both host_name and service_description), it</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * makes sense here.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"></span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">/** return flags usable from the callback function of dkhash_walk_data() */</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="dkhash_8h.html#a1237519f5f531a5ca1c2230088b8ffd6"> 18</a></span> <span class="preprocessor">#define DKHASH_WALK_REMOVE 1 </span><span class="comment">/**< Remove the most recently visited object */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="dkhash_8h.html#ac82fbc44fa4033b6740453b8ee19f24e"> 19</a></span> <span class="preprocessor"></span><span class="preprocessor">#define DKHASH_WALK_STOP 2 </span><span class="comment">/**< Cause walking to stop */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">/** return values for dkhash_insert() */</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"><a class="line" href="dkhash_8h.html#a692ac1914579ba43ddfb86fc8dd80e5b"> 22</a></span> <span class="preprocessor">#define DKHASH_OK 0 </span><span class="comment">/**< Success */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="dkhash_8h.html#a0017b1cb48394714f36c6afcfd5e9667"> 23</a></span> <span class="preprocessor"></span><span class="preprocessor">#define DKHASH_EDUPE (-EPERM) </span><span class="comment">/**< duplicate insert attempted */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="dkhash_8h.html#af47f37bf6db64b8968e36bb0153dd2aa"> 24</a></span> <span class="preprocessor"></span><span class="preprocessor">#define DKHASH_EPERM (-EPERM) </span><span class="comment">/**< duplicate insert attempted */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00025"></a><span class="lineno"><a class="line" href="dkhash_8h.html#ac16da1d934c8c39e89c8cbe2ef4521de"> 25</a></span> <span class="preprocessor"></span><span class="preprocessor">#define DKHASH_EINVAL (-EINVAL) </span><span class="comment">/**< Invalid parameters passed */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="dkhash_8h.html#a2359a936e1570a68373737a552b4c491"> 26</a></span> <span class="preprocessor"></span><span class="preprocessor">#define DKHASH_ENOMEM (-ENOMEM) </span><span class="comment">/**< Memory allocation failed */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">struct </span><a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a>;<span class="comment"></span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">/** opaque type */</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84"> 30</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> <a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a>;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * Create a dual-keyed hash-table of the given size</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * Note that it's generally useful to make the table 25-30% larger</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * than the number of items you intend to store, and also note that</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * the 'size' arguments gets rounded up to the nearest power of 2.</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * @param size The desired size of the hash-table.</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">extern</span> <a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *<a class="code" href="dkhash_8h.html#a4089cf55e57c7a9696ce620791cc14ef">dkhash_create</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> size);</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"></span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * Destroy a dual-keyed hash table</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * @param t The table to destroy</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * @return 0 on success, -1 on errors</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="dkhash_8h.html#ac5b485bc59608b0f5de4d7eb374990c0">dkhash_destroy</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t);</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"></span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * Fetch the data associated with a particular key</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * @param t The table to get the data from</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * @param k1 The first key</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * @param k2 The second key</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * @return The data on success, NULL on errors or if data isn't found</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">extern</span> <span class="keywordtype">void</span> *<a class="code" href="dkhash_8h.html#ab8df5117eee672d6f814a5ed91dda110">dkhash_get</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t, <span class="keyword">const</span> <span class="keywordtype">char</span> *k1, <span class="keyword">const</span> <span class="keywordtype">char</span> *k2);</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"></span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * Insert a new entry into the hash table</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * @param t The hash table</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * @param k1 The first key</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * @param k2 The second key (may be null)</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * @param data The data to insert</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * @return 0 on success, < 0 on errors</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="dkhash_8h.html#a0beac882fb36d5f8f355e82f77167eaa">dkhash_insert</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t, <span class="keyword">const</span> <span class="keywordtype">char</span> *k1, <span class="keyword">const</span> <span class="keywordtype">char</span> *k2, <span class="keywordtype">void</span> *data);</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"></span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * Remove data from the hash table</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> * Note that this does not free() the pointer to the data stored in the</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * table. It just destroys containers for that data in the hash table.</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * @param t The hash table</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * @param k1 The first key</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * @param k2 The second key</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * @return The removed data on success, or NULL on errors</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">extern</span> <span class="keywordtype">void</span> *<a class="code" href="dkhash_8h.html#a49a2175cad5bb6ebbf8db4e9e416e490">dkhash_remove</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t, <span class="keyword">const</span> <span class="keywordtype">char</span> *k1, <span class="keyword">const</span> <span class="keywordtype">char</span> *k2);</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"></span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * Call a function once for each item in the hash-table</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> * The callback function can return DKHASH_WALK_{REMOVE,STOP} or any</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> * OR'ed combination thereof to control the walking procedure, and</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> * should return 0 on the normal case.</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> * @param t The hash table</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> * @param walker The callback function to send the data to</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="keyword">extern</span> <span class="keywordtype">void</span> <a class="code" href="dkhash_8h.html#a62a80cf9c389ed8025fffc605c4ce25e">dkhash_walk_data</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t, <span class="keywordtype">int</span> (*walker)(<span class="keywordtype">void</span> *data));</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"></span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> * Get number of collisions in hash table</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> * Many collisions is a sign of a too small hash table or</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> * poor hash-function.</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> * @param t The hash table to report on</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> * @return The total number of collisions (not duplicates) from inserts</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="dkhash_8h.html#a0d4edc652b39c216a15bb1fcf2adbeda">dkhash_collisions</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"></span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> * Get number of items in the hash table</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> * @param t The hash table</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * @return Number of items currently in the hash-table</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="dkhash_8h.html#a6a9ae6207bc2392cf20d9c1c7ec9d53a">dkhash_num_entries</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t);</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"></span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> * Get max number of items stored in the hash table</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> * @param t The hash table</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> * @return Max number of items stored in hash-table</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="dkhash_8h.html#aa6e060bcedb0f75b241974f5f45bd866">dkhash_num_entries_max</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t);</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"></span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> * Get number of entries added to hash table</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * Note that some of them may have been removed.</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> * @param t The hash table</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> * @return The number of items added to the table</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="dkhash_8h.html#aba4b7dc064103d9dfa79488718a2e566">dkhash_num_entries_added</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"></span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"> * Get number of removed items from hash table</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> * @param t The hash table</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> * @return Number of items removed from hash table</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="dkhash_8h.html#a2c8d4dd27e7511cc8ca107a977179631">dkhash_num_entries_removed</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t);</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"></span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> * Get actual table size (in number of buckets)</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> * @param t The hash table</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> * @return Number of bucket-slots in hash table</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="dkhash_8h.html#af2880db78cafdfc5ab0a60b08f1615ec">dkhash_table_size</a>(<a class="code" href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a> *t);<span class="comment"></span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment">/** @} */</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="preprocessor">#endif </span><span class="comment">/* LIBNAGIOS_DKHASH_H_INCLUDED */</span><span class="preprocessor"></span></div>
<div class="ttc" id="dkhash_8h_html_aba4b7dc064103d9dfa79488718a2e566"><div class="ttname"><a href="dkhash_8h.html#aba4b7dc064103d9dfa79488718a2e566">dkhash_num_entries_added</a></div><div class="ttdeci">unsigned int dkhash_num_entries_added(dkhash_table *t)</div><div class="ttdoc">Get number of entries added to hash table Note that some of them may have been removed. </div></div>
<div class="ttc" id="dkhash_8h_html_a6a9ae6207bc2392cf20d9c1c7ec9d53a"><div class="ttname"><a href="dkhash_8h.html#a6a9ae6207bc2392cf20d9c1c7ec9d53a">dkhash_num_entries</a></div><div class="ttdeci">unsigned int dkhash_num_entries(dkhash_table *t)</div><div class="ttdoc">Get number of items in the hash table. </div></div>
<div class="ttc" id="dkhash_8h_html_ab8df5117eee672d6f814a5ed91dda110"><div class="ttname"><a href="dkhash_8h.html#ab8df5117eee672d6f814a5ed91dda110">dkhash_get</a></div><div class="ttdeci">void * dkhash_get(dkhash_table *t, const char *k1, const char *k2)</div><div class="ttdoc">Fetch the data associated with a particular key. </div></div>
<div class="ttc" id="dkhash_8h_html_ac5b485bc59608b0f5de4d7eb374990c0"><div class="ttname"><a href="dkhash_8h.html#ac5b485bc59608b0f5de4d7eb374990c0">dkhash_destroy</a></div><div class="ttdeci">int dkhash_destroy(dkhash_table *t)</div><div class="ttdoc">Destroy a dual-keyed hash table. </div></div>
<div class="ttc" id="dkhash_8h_html_a62a80cf9c389ed8025fffc605c4ce25e"><div class="ttname"><a href="dkhash_8h.html#a62a80cf9c389ed8025fffc605c4ce25e">dkhash_walk_data</a></div><div class="ttdeci">void dkhash_walk_data(dkhash_table *t, int(*walker)(void *data))</div><div class="ttdoc">Call a function once for each item in the hash-table The callback function can return DKHASH_WALK_{RE...</div></div>
<div class="ttc" id="dkhash_8h_html_af2880db78cafdfc5ab0a60b08f1615ec"><div class="ttname"><a href="dkhash_8h.html#af2880db78cafdfc5ab0a60b08f1615ec">dkhash_table_size</a></div><div class="ttdeci">unsigned int dkhash_table_size(dkhash_table *t)</div><div class="ttdoc">Get actual table size (in number of buckets) </div></div>
<div class="ttc" id="dkhash_8h_html_a0beac882fb36d5f8f355e82f77167eaa"><div class="ttname"><a href="dkhash_8h.html#a0beac882fb36d5f8f355e82f77167eaa">dkhash_insert</a></div><div class="ttdeci">int dkhash_insert(dkhash_table *t, const char *k1, const char *k2, void *data)</div><div class="ttdoc">Insert a new entry into the hash table. </div></div>
<div class="ttc" id="dkhash_8h_html_a0d4edc652b39c216a15bb1fcf2adbeda"><div class="ttname"><a href="dkhash_8h.html#a0d4edc652b39c216a15bb1fcf2adbeda">dkhash_collisions</a></div><div class="ttdeci">unsigned int dkhash_collisions(dkhash_table *t)</div><div class="ttdoc">Get number of collisions in hash table Many collisions is a sign of a too small hash table or poor ha...</div></div>
<div class="ttc" id="dkhash_8h_html_a24ce8d97b87656b597e3a713eff95b84"><div class="ttname"><a href="dkhash_8h.html#a24ce8d97b87656b597e3a713eff95b84">dkhash_table</a></div><div class="ttdeci">struct dkhash_table dkhash_table</div><div class="ttdoc">opaque type </div><div class="ttdef"><b>Definition:</b> dkhash.h:30</div></div>
<div class="ttc" id="dkhash_8h_html_a4089cf55e57c7a9696ce620791cc14ef"><div class="ttname"><a href="dkhash_8h.html#a4089cf55e57c7a9696ce620791cc14ef">dkhash_create</a></div><div class="ttdeci">dkhash_table * dkhash_create(unsigned int size)</div><div class="ttdoc">Create a dual-keyed hash-table of the given size Note that it&#39;s generally useful to make the table 25...</div></div>
<div class="ttc" id="dkhash_8h_html_a2c8d4dd27e7511cc8ca107a977179631"><div class="ttname"><a href="dkhash_8h.html#a2c8d4dd27e7511cc8ca107a977179631">dkhash_num_entries_removed</a></div><div class="ttdeci">unsigned int dkhash_num_entries_removed(dkhash_table *t)</div><div class="ttdoc">Get number of removed items from hash table. </div></div>
<div class="ttc" id="dkhash_8h_html_aa6e060bcedb0f75b241974f5f45bd866"><div class="ttname"><a href="dkhash_8h.html#aa6e060bcedb0f75b241974f5f45bd866">dkhash_num_entries_max</a></div><div class="ttdeci">unsigned int dkhash_num_entries_max(dkhash_table *t)</div><div class="ttdoc">Get max number of items stored in the hash table. </div></div>
<div class="ttc" id="dkhash_8h_html_a49a2175cad5bb6ebbf8db4e9e416e490"><div class="ttname"><a href="dkhash_8h.html#a49a2175cad5bb6ebbf8db4e9e416e490">dkhash_remove</a></div><div class="ttdeci">void * dkhash_remove(dkhash_table *t, const char *k1, const char *k2)</div><div class="ttdoc">Remove data from the hash table Note that this does not free() the pointer to the data stored in the ...</div></div>
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