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<a href="../../d9/d13/btree_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="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">#ifndef BTREE_H</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">#define BTREE_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">#include <stdio.h></span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"></span> </div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">#include "ubixfs.h"</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">#include "btreeheader.h"</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">#include "file.h"</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"></span> </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">#define B_NODE_MAGIC_1 0xDEADBEEF</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">#define B_NODE_MAGIC_2 0x1900BABE</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">#define B_MAX_KEYS 15</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">#define B_MAX_NAME_LENGTH 240</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">#define B_MAX_CHILD_COUNT 4</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">// if any of these structs change they have to be updated in the format</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">// utility too</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"></span> </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">typedef struct bNode { </span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> uInt32 magic1 __attribute__ ((packed));</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> uInt32 used __attribute__ ((packed));</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> uPtr parent __attribute__ ((packed));</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> uInt64 tag __attribute__ ((packed));</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> char keys[B_MAX_KEYS][B_MAX_NAME_LENGTH] __attribute__ ((packed));</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> bool present[B_MAX_KEYS+1] __attribute__ ((packed));</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> uPtr head[B_MAX_KEYS+1] __attribute__ ((packed));</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> uPtr tail[B_MAX_KEYS+1] __attribute__ ((packed));</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> uInt32 childCount[B_MAX_KEYS+1] __attribute__ ((packed));</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> uInt32 magic2 __attribute__ ((packed));</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> bool leaf __attribute__ ((packed));</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> char reserved[131] __attribute__ ((packed));</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">} bNode; // bNode</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"></span> </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">struct ubixfsInode;</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"></span> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">class bTree {</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> protected:</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> bNode * root;</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> UbixFS * fs;</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> bTreeHeader * header;</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> fileDescriptor * fd;</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> uInt32 tag;</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> ubixfsInode * treeSearch(bNode *, const char *);</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> ubixfsInode * inodeSearch(ubixfsInode *, const char *);</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> void splitNode(bNode *);</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> bNode * allocEmptyNode(void);</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> void insertNode(bNode *, const char *, bNode *);</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> bNode * findLeafNode(bNode *, const char *);</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> void Print(bNode *);</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> void saveNode(FILE *, bNode *, void *);</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> public:</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> bTree(const char *, ubixfsInode *);</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> bTree(UbixFS *, fileDescriptor *);</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> ubixfsInode * Find(const char *);</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> ubixfsInode * GetFirstNode(void);</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> ubixfsInode * GetFirstNode(bNode *);</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> bool Delete(const char *);</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> void Info(void);</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> void Info(const bNode *);</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> bool Insert(const char *, ubixfsInode *);</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> bool Save(const char *);</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> bool Load(const char *);</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> void Print(void);</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> void PrintWholeTree(void);</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> bool Verify(void);</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> ~bTree(void);</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> friend class UbixFS;</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment">}; // bTree</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">#endif // !BTREE_H</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment">*/</span></div>
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