1 | *** XRef.cc.orig Thu Jul 22 11:04:22 2004
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2 | --- XRef.cc Thu Jul 22 11:04:31 2004
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3 | ***************
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4 | *** 96,102 ****
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5 | }
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6 | nObjects = obj1.getInt();
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7 | obj1.free();
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8 | ! if (nObjects == 0) {
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9 | goto err1;
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10 | }
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11 |
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12 | --- 96,102 ----
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13 | }
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14 | nObjects = obj1.getInt();
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15 | obj1.free();
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16 | ! if (nObjects <= 0) {
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17 | goto err1;
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18 | }
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19 |
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20 | ***************
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21 | *** 106,111 ****
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22 | --- 106,114 ----
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23 | }
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24 | first = obj1.getInt();
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25 | obj1.free();
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26 | + if (first < 0) {
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27 | + goto err1;
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28 | + }
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29 |
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30 | objs = new Object[nObjects];
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31 | objNums = (int *)gmalloc(nObjects * sizeof(int));
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32 | ***************
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33 | *** 130,135 ****
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34 | --- 133,144 ----
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35 | offsets[i] = obj2.getInt();
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36 | obj1.free();
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37 | obj2.free();
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38 | + if (objNums[i] < 0 || offsets[i] < 0 ||
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39 | + (i > 0 && offsets[i] < offsets[i-1])) {
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40 | + delete parser;
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41 | + gfree(offsets);
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42 | + goto err1;
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43 | + }
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44 | }
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45 | while (str->getChar() != EOF) ;
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46 | delete parser;
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47 | ***************
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48 | *** 369,378 ****
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49 | }
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50 | n = obj.getInt();
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51 | obj.free();
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52 | if (first + n > size) {
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53 | for (newSize = size ? 2 * size : 1024;
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54 | ! first + n > newSize;
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55 | newSize <<= 1) ;
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56 | entries = (XRefEntry *)grealloc(entries, newSize * sizeof(XRefEntry));
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57 | for (i = size; i < newSize; ++i) {
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58 | entries[i].offset = 0xffffffff;
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59 | --- 378,393 ----
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60 | }
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61 | n = obj.getInt();
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62 | obj.free();
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63 | + if (first < 0 || n < 0 || first + n < 0) {
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64 | + goto err1;
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65 | + }
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66 | if (first + n > size) {
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67 | for (newSize = size ? 2 * size : 1024;
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68 | ! first + n > newSize && newSize > 0;
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69 | newSize <<= 1) ;
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70 | + if (newSize < 0) {
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71 | + goto err1;
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72 | + }
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73 | entries = (XRefEntry *)grealloc(entries, newSize * sizeof(XRefEntry));
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74 | for (i = size; i < newSize; ++i) {
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75 | entries[i].offset = 0xffffffff;
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76 | ***************
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77 | *** 443,449 ****
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78 |
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79 | // check for an 'XRefStm' key
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80 | if (obj.getDict()->lookup("XRefStm", &obj2)->isInt()) {
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81 | ! pos2 = obj2.getInt();
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82 | readXRef(&pos2);
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83 | if (!ok) {
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84 | goto err1;
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85 | --- 458,464 ----
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86 |
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87 | // check for an 'XRefStm' key
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88 | if (obj.getDict()->lookup("XRefStm", &obj2)->isInt()) {
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89 | ! pos2 = (Guint)obj2.getInt();
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90 | readXRef(&pos2);
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91 | if (!ok) {
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92 | goto err1;
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93 | ***************
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94 | *** 474,479 ****
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95 | --- 489,497 ----
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96 | }
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97 | newSize = obj.getInt();
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98 | obj.free();
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99 | + if (newSize < 0) {
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100 | + goto err1;
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101 | + }
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102 | if (newSize > size) {
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103 | entries = (XRefEntry *)grealloc(entries, newSize * sizeof(XRefEntry));
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104 | for (i = size; i < newSize; ++i) {
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105 | ***************
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106 | *** 494,499 ****
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107 | --- 512,520 ----
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108 | }
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109 | w[i] = obj2.getInt();
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110 | obj2.free();
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111 | + if (w[i] < 0 || w[i] > 4) {
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112 | + goto err1;
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113 | + }
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114 | }
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115 | obj.free();
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116 |
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117 | ***************
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118 | *** 513,525 ****
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119 | }
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120 | n = obj.getInt();
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121 | obj.free();
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122 | ! if (!readXRefStreamSection(xrefStr, w, first, n)) {
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123 | idx.free();
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124 | goto err0;
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125 | }
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126 | }
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127 | } else {
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128 | ! if (!readXRefStreamSection(xrefStr, w, 0, size)) {
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129 | idx.free();
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130 | goto err0;
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131 | }
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132 | --- 534,547 ----
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133 | }
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134 | n = obj.getInt();
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135 | obj.free();
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136 | ! if (first < 0 || n < 0 ||
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137 | ! !readXRefStreamSection(xrefStr, w, first, n)) {
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138 | idx.free();
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139 | goto err0;
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140 | }
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141 | }
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142 | } else {
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143 | ! if (!readXRefStreamSection(xrefStr, w, 0, newSize)) {
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144 | idx.free();
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145 | goto err0;
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146 | }
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147 | ***************
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148 | *** 551,560 ****
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149 | Guint offset;
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150 | int type, gen, c, newSize, i, j;
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151 |
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152 | if (first + n > size) {
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153 | for (newSize = size ? 2 * size : 1024;
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154 | ! first + n > newSize;
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155 | newSize <<= 1) ;
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156 | entries = (XRefEntry *)grealloc(entries, newSize * sizeof(XRefEntry));
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157 | for (i = size; i < newSize; ++i) {
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158 | entries[i].offset = 0xffffffff;
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159 | --- 573,588 ----
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160 | Guint offset;
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161 | int type, gen, c, newSize, i, j;
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162 |
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163 | + if (first + n < 0) {
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164 | + return gFalse;
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165 | + }
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166 | if (first + n > size) {
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167 | for (newSize = size ? 2 * size : 1024;
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168 | ! first + n > newSize && newSize > 0;
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169 | newSize <<= 1) ;
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170 | + if (newSize < 0) {
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171 | + return gFalse;
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172 | + }
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173 | entries = (XRefEntry *)grealloc(entries, newSize * sizeof(XRefEntry));
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174 | for (i = size; i < newSize; ++i) {
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175 | entries[i].offset = 0xffffffff;
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176 | ***************
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177 | *** 585,608 ****
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178 | }
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179 | gen = (gen << 8) + c;
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180 | }
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181 | ! switch (type) {
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182 | ! case 0:
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183 | ! entries[i].offset = offset;
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184 | ! entries[i].gen = gen;
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185 | ! entries[i].type = xrefEntryFree;
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186 | ! break;
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187 | ! case 1:
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188 | ! entries[i].offset = offset;
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189 | ! entries[i].gen = gen;
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190 | ! entries[i].type = xrefEntryUncompressed;
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191 | ! break;
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192 | ! case 2:
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193 | ! entries[i].offset = offset;
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194 | ! entries[i].gen = gen;
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195 | ! entries[i].type = xrefEntryCompressed;
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196 | ! break;
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197 | ! default:
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198 | ! return gFalse;
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199 | }
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200 | }
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201 |
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202 | --- 613,638 ----
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203 | }
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204 | gen = (gen << 8) + c;
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205 | }
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206 | ! if (entries[i].offset == 0xffffffff) {
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207 | ! switch (type) {
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208 | ! case 0:
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209 | ! entries[i].offset = offset;
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210 | ! entries[i].gen = gen;
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211 | ! entries[i].type = xrefEntryFree;
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212 | ! break;
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213 | ! case 1:
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214 | ! entries[i].offset = offset;
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215 | ! entries[i].gen = gen;
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216 | ! entries[i].type = xrefEntryUncompressed;
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217 | ! break;
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218 | ! case 2:
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219 | ! entries[i].offset = offset;
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220 | ! entries[i].gen = gen;
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221 | ! entries[i].type = xrefEntryCompressed;
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222 | ! break;
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223 | ! default:
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224 | ! return gFalse;
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225 | ! }
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226 | }
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227 | }
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228 |
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229 | ***************
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230 | *** 664,701 ****
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231 | // look for object
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232 | } else if (isdigit(*p)) {
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233 | num = atoi(p);
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234 | ! do {
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235 | ! ++p;
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236 | ! } while (*p && isdigit(*p));
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237 | ! if (isspace(*p)) {
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238 | do {
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239 | ++p;
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240 | ! } while (*p && isspace(*p));
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241 | ! if (isdigit(*p)) {
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242 | ! gen = atoi(p);
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243 | do {
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244 | ++p;
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245 | ! } while (*p && isdigit(*p));
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246 | ! if (isspace(*p)) {
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247 | do {
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248 | ++p;
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249 | ! } while (*p && isspace(*p));
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250 | ! if (!strncmp(p, "obj", 3)) {
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251 | ! if (num >= size) {
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252 | ! newSize = (num + 1 + 255) & ~255;
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253 | ! entries = (XRefEntry *)
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254 | ! grealloc(entries, newSize * sizeof(XRefEntry));
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255 | ! for (i = size; i < newSize; ++i) {
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256 | ! entries[i].offset = 0xffffffff;
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257 | ! entries[i].type = xrefEntryFree;
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258 | }
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259 | - size = newSize;
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260 | - }
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261 | - if (entries[num].type == xrefEntryFree ||
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262 | - gen >= entries[num].gen) {
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263 | - entries[num].offset = pos - start;
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264 | - entries[num].gen = gen;
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265 | - entries[num].type = xrefEntryUncompressed;
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266 | }
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267 | }
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268 | }
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269 | --- 694,737 ----
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270 | // look for object
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271 | } else if (isdigit(*p)) {
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272 | num = atoi(p);
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273 | ! if (num > 0) {
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274 | do {
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275 | ++p;
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276 | ! } while (*p && isdigit(*p));
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277 | ! if (isspace(*p)) {
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278 | do {
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279 | ++p;
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280 | ! } while (*p && isspace(*p));
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281 | ! if (isdigit(*p)) {
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282 | ! gen = atoi(p);
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283 | do {
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284 | ++p;
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285 | ! } while (*p && isdigit(*p));
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286 | ! if (isspace(*p)) {
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287 | ! do {
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288 | ! ++p;
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289 | ! } while (*p && isspace(*p));
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290 | ! if (!strncmp(p, "obj", 3)) {
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291 | ! if (num >= size) {
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292 | ! newSize = (num + 1 + 255) & ~255;
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293 | ! if (newSize < 0) {
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294 | ! error(-1, "Bad object number");
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295 | ! return gFalse;
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296 | ! }
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297 | ! entries = (XRefEntry *)
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298 | ! grealloc(entries, newSize * sizeof(XRefEntry));
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299 | ! for (i = size; i < newSize; ++i) {
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300 | ! entries[i].offset = 0xffffffff;
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301 | ! entries[i].type = xrefEntryFree;
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302 | ! }
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303 | ! size = newSize;
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304 | ! }
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305 | ! if (entries[num].type == xrefEntryFree ||
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306 | ! gen >= entries[num].gen) {
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307 | ! entries[num].offset = pos - start;
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308 | ! entries[num].gen = gen;
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309 | ! entries[num].type = xrefEntryUncompressed;
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310 | }
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311 | }
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312 | }
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313 | }
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314 |
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315 |
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