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<li class="navelem"><a class="el" href="dir_d8932fa6a98bd8bb8c6a5db7a859fe2a.html">dbm</a></li><li class="navelem"><a class="el" href="dir_4a53a1a9777db677f1b639ba27394776.html">sdbm</a></li> </ul>
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<div class="title">sdbm_private.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* Licensed to the Apache Software Foundation (ASF) under one or more</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * contributor license agreements. See the NOTICE file distributed with</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * this work for additional information regarding copyright ownership.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * (the "License"); you may not use this file except in compliance with</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * the License. You may obtain a copy of the License at</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> *</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * limitations under the License.</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> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">/*</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * sdbm - ndbm work-alike hashed database library</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * based on Per-Ake Larson's Dynamic Hashing algorithms. BIT 18 (1978).</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * author: oz@nexus.yorku.ca</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> */</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#ifndef SDBM_PRIVATE_H</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#define SDBM_PRIVATE_H</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "apr.h"</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "apr_pools.h"</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include "apr_file_io.h"</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "apr_errno.h"</span> <span class="comment">/* for apr_status_t */</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#if 0</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">/* if the block/page size is increased, it breaks perl apr_sdbm_t compatibility */</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#define DBLKSIZ 16384</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#define PBLKSIZ 8192</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#define PAIRMAX 8008 </span><span class="comment">/* arbitrary on PBLKSIZ-N */</span><span class="preprocessor"></span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#define DBLKSIZ 4096</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#define PBLKSIZ 1024</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#define PAIRMAX 1008 </span><span class="comment">/* arbitrary on PBLKSIZ-N */</span><span class="preprocessor"></span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#define SPLTMAX 10 </span><span class="comment">/* maximum allowed splits */</span><span class="preprocessor"></span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">/* for apr_sdbm_t.flags */</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#define SDBM_RDONLY 0x1 </span><span class="comment">/* data base open read-only */</span><span class="preprocessor"></span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#define SDBM_SHARED 0x2 </span><span class="comment">/* data base open for sharing */</span><span class="preprocessor"></span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#define SDBM_SHARED_LOCK 0x4 </span><span class="comment">/* data base locked for shared read */</span><span class="preprocessor"></span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#define SDBM_EXCLUSIVE_LOCK 0x8 </span><span class="comment">/* data base locked for write */</span><span class="preprocessor"></span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="structapr__sdbm__t.html"> 49</a></span> <span class="keyword">struct </span><a class="code" href="structapr__sdbm__t.html">apr_sdbm_t</a> {</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  apr_pool_t *pool;</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  apr_file_t *dirf; <span class="comment">/* directory file descriptor */</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  apr_file_t *pagf; <span class="comment">/* page file descriptor */</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  apr_int32_t flags; <span class="comment">/* status/error flags, see below */</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordtype">long</span> maxbno; <span class="comment">/* size of dirfile in bits */</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordtype">long</span> curbit; <span class="comment">/* current bit number */</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordtype">long</span> hmask; <span class="comment">/* current hash mask */</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordtype">long</span> blkptr; <span class="comment">/* current block for nextkey */</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordtype">int</span> keyptr; <span class="comment">/* current key for nextkey */</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordtype">long</span> blkno; <span class="comment">/* current page to read/write */</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordtype">long</span> pagbno; <span class="comment">/* current page in pagbuf */</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordtype">char</span> pagbuf[PBLKSIZ]; <span class="comment">/* page file block buffer */</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordtype">long</span> dirbno; <span class="comment">/* current block in dirbuf */</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordtype">char</span> dirbuf[DBLKSIZ]; <span class="comment">/* directory file block buffer */</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">int</span> lckcnt; <span class="comment">/* number of calls to sdbm_lock */</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> };</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#define sdbm_hash apu__sdbm_hash</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#define sdbm_nullitem apu__sdbm_nullitem</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="keyword">extern</span> <span class="keyword">const</span> <a class="code" href="structapr__sdbm__datum__t.html">apr_sdbm_datum_t</a> sdbm_nullitem;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="keywordtype">long</span> sdbm_hash(<span class="keyword">const</span> <span class="keywordtype">char</span> *str, <span class="keywordtype">int</span> len);</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</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="comment"> * zero the cache</span></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="preprocessor">#define SDBM_INVALIDATE_CACHE(db, finfo) \</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor"> do { db->dirbno = (!finfo.size) ? 0 : -1; \</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor"> db->pagbno = -1; \</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor"> db->maxbno = (long)(finfo.size * BYTESIZ); \</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor"> } while (0);</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#endif </span><span class="comment">/* SDBM_PRIVATE_H */</span><span class="preprocessor"></span></div><div class="ttc" id="structapr__sdbm__datum__t_html"><div class="ttname"><a href="structapr__sdbm__datum__t.html">apr_sdbm_datum_t</a></div><div class="ttdef"><b>Definition:</b> apr_sdbm.h:49</div></div>
<div class="ttc" id="structapr__sdbm__t_html"><div class="ttname"><a href="structapr__sdbm__t.html">apr_sdbm_t</a></div><div class="ttdef"><b>Definition:</b> sdbm_private.h:49</div></div>
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