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11 <h1>examples/PIPS/antiword/src/depot.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> |
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12 <a name="l00002"></a>00002 <span class="comment"> * depot.c</span> |
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13 <a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 1998-2002 A.J. van Os; Released under GPL</span> |
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14 <a name="l00004"></a>00004 <span class="comment"> *</span> |
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15 <a name="l00005"></a>00005 <span class="comment"> * Description:</span> |
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16 <a name="l00006"></a>00006 <span class="comment"> * Functions to compute the depot offset</span> |
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17 <a name="l00007"></a>00007 <span class="comment"> */</span> |
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18 <a name="l00008"></a>00008 |
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19 <a name="l00009"></a>00009 <span class="preprocessor">#include "antiword.h"</span> |
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20 <a name="l00010"></a>00010 |
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21 <a name="l00011"></a>00011 <span class="preprocessor">#define SIZE_RATIO (BIG_BLOCK_SIZE/SMALL_BLOCK_SIZE)</span> |
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22 <a name="l00012"></a>00012 <span class="preprocessor"></span> |
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23 <a name="l00013"></a>00013 <span class="keyword">static</span> ULONG *aulSmallBlockList = NULL; |
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24 <a name="l00014"></a>00014 <span class="keyword">static</span> <span class="keywordtype">size_t</span> tSmallBlockListLen = 0; |
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25 <a name="l00015"></a>00015 |
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26 <a name="l00016"></a>00016 |
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27 <a name="l00017"></a>00017 <span class="comment">/*</span> |
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28 <a name="l00018"></a>00018 <span class="comment"> * vDestroySmallBlockList - destroy the small block list</span> |
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29 <a name="l00019"></a>00019 <span class="comment"> */</span> |
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30 <a name="l00020"></a>00020 <span class="keywordtype">void</span> |
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31 <a name="l00021"></a>00021 vDestroySmallBlockList(<span class="keywordtype">void</span>) |
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32 <a name="l00022"></a>00022 { |
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33 <a name="l00023"></a>00023 DBG_MSG(<span class="stringliteral">"vDestroySmallBlockList"</span>); |
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34 <a name="l00024"></a>00024 |
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35 <a name="l00025"></a>00025 aulSmallBlockList = xfree(aulSmallBlockList); |
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36 <a name="l00026"></a>00026 tSmallBlockListLen = 0; |
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37 <a name="l00027"></a>00027 } <span class="comment">/* end of vDestroySmalBlockList */</span> |
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38 <a name="l00028"></a>00028 |
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39 <a name="l00029"></a>00029 <span class="comment">/*</span> |
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40 <a name="l00030"></a>00030 <span class="comment"> * vCreateSmallBlockList - create the small block list</span> |
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41 <a name="l00031"></a>00031 <span class="comment"> *</span> |
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42 <a name="l00032"></a>00032 <span class="comment"> * returns: TRUE when successful, otherwise FALSE</span> |
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43 <a name="l00033"></a>00033 <span class="comment"> */</span> |
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44 <a name="l00034"></a>00034 BOOL |
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45 <a name="l00035"></a>00035 bCreateSmallBlockList(ULONG ulStartblock, <span class="keyword">const</span> ULONG *aulBBD, <span class="keywordtype">size_t</span> tBBDLen) |
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46 <a name="l00036"></a>00036 { |
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47 <a name="l00037"></a>00037 ULONG ulTmp; |
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48 <a name="l00038"></a>00038 <span class="keywordtype">size_t</span> tSize; |
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49 <a name="l00039"></a>00039 <span class="keywordtype">int</span> iIndex; |
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50 <a name="l00040"></a>00040 |
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51 <a name="l00041"></a>00041 fail(aulSmallBlockList != NULL); |
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52 <a name="l00042"></a>00042 fail(tSmallBlockListLen != 0); |
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53 <a name="l00043"></a>00043 fail(ulStartblock > MAX_BLOCKNUMBER && ulStartblock != END_OF_CHAIN); |
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54 <a name="l00044"></a>00044 fail(aulBBD == NULL); |
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55 <a name="l00045"></a>00045 fail(tBBDLen == 0); |
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56 <a name="l00046"></a>00046 |
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57 <a name="l00047"></a>00047 <span class="comment">/* Find the length of the small block list */</span> |
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58 <a name="l00048"></a>00048 <span class="keywordflow">for</span> (tSmallBlockListLen = 0, ulTmp = ulStartblock; |
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59 <a name="l00049"></a>00049 tSmallBlockListLen < tBBDLen && ulTmp != END_OF_CHAIN; |
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60 <a name="l00050"></a>00050 tSmallBlockListLen++, ulTmp = aulBBD[ulTmp]) { |
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61 <a name="l00051"></a>00051 <span class="keywordflow">if</span> (ulTmp >= (ULONG)tBBDLen) { |
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62 <a name="l00052"></a>00052 DBG_DEC(ulTmp); |
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63 <a name="l00053"></a>00053 DBG_DEC(tBBDLen); |
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64 <a name="l00054"></a>00054 werr(1, <span class="stringliteral">"The Big Block Depot is damaged"</span>); |
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65 <a name="l00055"></a>00055 } |
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66 <a name="l00056"></a>00056 } |
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67 <a name="l00057"></a>00057 DBG_DEC(tSmallBlockListLen); |
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68 <a name="l00058"></a>00058 |
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69 <a name="l00059"></a>00059 <span class="keywordflow">if</span> (tSmallBlockListLen == 0) { |
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70 <a name="l00060"></a>00060 <span class="comment">/* There is no small block list */</span> |
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71 <a name="l00061"></a>00061 fail(ulStartblock != END_OF_CHAIN); |
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72 <a name="l00062"></a>00062 aulSmallBlockList = NULL; |
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73 <a name="l00063"></a>00063 <span class="keywordflow">return</span> TRUE; |
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74 <a name="l00064"></a>00064 } |
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75 <a name="l00065"></a>00065 |
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76 <a name="l00066"></a>00066 <span class="comment">/* Create the small block list */</span> |
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77 <a name="l00067"></a>00067 tSize = tSmallBlockListLen * <span class="keyword">sizeof</span>(ULONG); |
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78 <a name="l00068"></a>00068 aulSmallBlockList = xmalloc(tSize); |
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79 <a name="l00069"></a>00069 <span class="keywordflow">for</span> (iIndex = 0, ulTmp = ulStartblock; |
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80 <a name="l00070"></a>00070 iIndex < (int)tBBDLen && ulTmp != END_OF_CHAIN; |
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81 <a name="l00071"></a>00071 iIndex++, ulTmp = aulBBD[ulTmp]) { |
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82 <a name="l00072"></a>00072 <span class="keywordflow">if</span> (ulTmp >= (ULONG)tBBDLen) { |
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83 <a name="l00073"></a>00073 DBG_DEC(ulTmp); |
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84 <a name="l00074"></a>00074 DBG_DEC(tBBDLen); |
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85 <a name="l00075"></a>00075 werr(1, <span class="stringliteral">"The Big Block Depot is damaged"</span>); |
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86 <a name="l00076"></a>00076 } |
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87 <a name="l00077"></a>00077 aulSmallBlockList[iIndex] = ulTmp; |
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88 <a name="l00078"></a>00078 NO_DBG_DEC(aulSmallBlockList[iIndex]); |
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89 <a name="l00079"></a>00079 } |
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90 <a name="l00080"></a>00080 <span class="keywordflow">return</span> TRUE; |
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91 <a name="l00081"></a>00081 } <span class="comment">/* end of bCreateSmallBlockList */</span> |
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92 <a name="l00082"></a>00082 |
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93 <a name="l00083"></a>00083 <span class="comment">/*</span> |
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94 <a name="l00084"></a>00084 <span class="comment"> * ulDepotOffset - get the depot offset the block list</span> |
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95 <a name="l00085"></a>00085 <span class="comment"> */</span> |
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96 <a name="l00086"></a>00086 ULONG |
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97 <a name="l00087"></a>00087 ulDepotOffset(ULONG ulIndex, <span class="keywordtype">size_t</span> tBlockSize) |
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98 <a name="l00088"></a>00088 { |
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99 <a name="l00089"></a>00089 ULONG ulTmp; |
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100 <a name="l00090"></a>00090 <span class="keywordtype">size_t</span> tTmp; |
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101 <a name="l00091"></a>00091 |
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102 <a name="l00092"></a>00092 fail(ulIndex >= ULONG_MAX / BIG_BLOCK_SIZE); |
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103 <a name="l00093"></a>00093 |
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104 <a name="l00094"></a>00094 <span class="keywordflow">switch</span> (tBlockSize) { |
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105 <a name="l00095"></a>00095 <span class="keywordflow">case</span> BIG_BLOCK_SIZE: |
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106 <a name="l00096"></a>00096 <span class="keywordflow">return</span> (ulIndex + 1) * BIG_BLOCK_SIZE; |
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107 <a name="l00097"></a>00097 <span class="keywordflow">case</span> SMALL_BLOCK_SIZE: |
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108 <a name="l00098"></a>00098 tTmp = (size_t)(ulIndex / SIZE_RATIO); |
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109 <a name="l00099"></a>00099 ulTmp = ulIndex % SIZE_RATIO; |
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110 <a name="l00100"></a>00100 <span class="keywordflow">if</span> (aulSmallBlockList == NULL || |
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111 <a name="l00101"></a>00101 tTmp >= tSmallBlockListLen) { |
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112 <a name="l00102"></a>00102 DBG_HEX(aulSmallBlockList); |
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113 <a name="l00103"></a>00103 DBG_DEC(tSmallBlockListLen); |
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114 <a name="l00104"></a>00104 DBG_DEC(tTmp); |
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115 <a name="l00105"></a>00105 <span class="keywordflow">return</span> 0; |
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116 <a name="l00106"></a>00106 } |
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117 <a name="l00107"></a>00107 <span class="keywordflow">return</span> ((aulSmallBlockList[tTmp] + 1) * SIZE_RATIO + |
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118 <a name="l00108"></a>00108 ulTmp) * SMALL_BLOCK_SIZE; |
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119 <a name="l00109"></a>00109 <span class="keywordflow">default</span>: |
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120 <a name="l00110"></a>00110 DBG_DEC(tBlockSize); |
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121 <a name="l00111"></a>00111 DBG_FIXME(); |
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122 <a name="l00112"></a>00112 <span class="keywordflow">return</span> 0; |
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123 <a name="l00113"></a>00113 } |
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124 <a name="l00114"></a>00114 } <span class="comment">/* end of ulDepotOffset */</span> |
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125 </pre></div></div> |
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