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4680 | right-hear | 1 | #include "fitz.h" |
2 | #include "mupdf.h" |
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3 | |||
4 | static fz_obj * |
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5 | pdf_lookup_name_imp(fz_obj *node, fz_obj *needle) |
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6 | { |
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7 | fz_obj *kids = fz_dict_gets(node, "Kids"); |
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8 | fz_obj *names = fz_dict_gets(node, "Names"); |
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9 | |||
10 | if (fz_is_array(kids)) |
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11 | { |
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12 | int l = 0; |
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13 | int r = fz_array_len(kids) - 1; |
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14 | |||
15 | while (l <= r) |
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16 | { |
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17 | int m = (l + r) >> 1; |
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18 | fz_obj *kid = fz_array_get(kids, m); |
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19 | fz_obj *limits = fz_dict_gets(kid, "Limits"); |
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20 | fz_obj *first = fz_array_get(limits, 0); |
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21 | fz_obj *last = fz_array_get(limits, 1); |
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22 | |||
23 | if (fz_objcmp(needle, first) < 0) |
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24 | r = m - 1; |
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25 | else if (fz_objcmp(needle, last) > 0) |
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26 | l = m + 1; |
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27 | else |
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28 | return pdf_lookup_name_imp(kid, needle); |
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29 | } |
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30 | } |
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31 | |||
32 | if (fz_is_array(names)) |
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33 | { |
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34 | int l = 0; |
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35 | int r = (fz_array_len(names) / 2) - 1; |
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36 | |||
37 | while (l <= r) |
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38 | { |
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39 | int m = (l + r) >> 1; |
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40 | int c; |
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41 | fz_obj *key = fz_array_get(names, m * 2); |
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42 | fz_obj *val = fz_array_get(names, m * 2 + 1); |
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43 | |||
44 | c = fz_objcmp(needle, key); |
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45 | if (c < 0) |
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46 | r = m - 1; |
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47 | else if (c > 0) |
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48 | l = m + 1; |
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49 | else |
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50 | return val; |
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51 | } |
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52 | } |
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53 | |||
54 | return NULL; |
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55 | } |
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56 | |||
57 | fz_obj * |
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58 | pdf_lookup_name(pdf_xref *xref, char *which, fz_obj *needle) |
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59 | { |
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60 | fz_obj *root = fz_dict_gets(xref->trailer, "Root"); |
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61 | fz_obj *names = fz_dict_gets(root, "Names"); |
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62 | fz_obj *tree = fz_dict_gets(names, which); |
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63 | return pdf_lookup_name_imp(tree, needle); |
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64 | } |
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65 | |||
66 | fz_obj * |
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67 | pdf_lookup_dest(pdf_xref *xref, fz_obj *needle) |
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68 | { |
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69 | fz_obj *root = fz_dict_gets(xref->trailer, "Root"); |
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70 | fz_obj *dests = fz_dict_gets(root, "Dests"); |
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71 | fz_obj *names = fz_dict_gets(root, "Names"); |
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72 | fz_obj *dest = NULL; |
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73 | |||
74 | /* PDF 1.1 has destinations in a dictionary */ |
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75 | if (dests) |
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76 | { |
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77 | if (fz_is_name(needle)) |
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78 | return fz_dict_get(dests, needle); |
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79 | else |
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80 | return fz_dict_gets(dests, fz_to_str_buf(needle)); |
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81 | } |
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82 | |||
83 | /* PDF 1.2 has destinations in a name tree */ |
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84 | if (names && !dest) |
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85 | { |
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86 | fz_obj *tree = fz_dict_gets(names, "Dests"); |
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87 | return pdf_lookup_name_imp(tree, needle); |
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88 | } |
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89 | |||
90 | return NULL; |
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91 | } |
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92 | |||
93 | static void |
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94 | pdf_load_name_tree_imp(fz_obj *dict, pdf_xref *xref, fz_obj *node) |
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95 | { |
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96 | fz_obj *kids = fz_dict_gets(node, "Kids"); |
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97 | fz_obj *names = fz_dict_gets(node, "Names"); |
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98 | int i; |
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99 | |||
100 | if (kids) |
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101 | { |
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102 | for (i = 0; i < fz_array_len(kids); i++) |
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103 | pdf_load_name_tree_imp(dict, xref, fz_array_get(kids, i)); |
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104 | } |
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105 | |||
106 | if (names) |
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107 | { |
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108 | for (i = 0; i + 1 < fz_array_len(names); i += 2) |
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109 | { |
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110 | fz_obj *key = fz_array_get(names, i); |
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111 | fz_obj *val = fz_array_get(names, i + 1); |
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112 | if (fz_is_string(key)) |
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113 | { |
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114 | key = pdf_to_utf8_name(key); |
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115 | fz_dict_put(dict, key, val); |
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116 | fz_drop_obj(key); |
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117 | } |
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118 | else if (fz_is_name(key)) |
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119 | { |
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120 | fz_dict_put(dict, key, val); |
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121 | } |
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122 | } |
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123 | } |
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124 | } |
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125 | |||
126 | fz_obj * |
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127 | pdf_load_name_tree(pdf_xref *xref, char *which) |
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128 | { |
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129 | fz_obj *root = fz_dict_gets(xref->trailer, "Root"); |
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130 | fz_obj *names = fz_dict_gets(root, "Names"); |
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131 | fz_obj *tree = fz_dict_gets(names, which); |
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132 | if (fz_is_dict(tree)) |
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133 | { |
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134 | fz_obj *dict = fz_new_dict(100); |
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135 | pdf_load_name_tree_imp(dict, xref, tree); |
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136 | return dict; |
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137 | } |
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138 | return NULL; |
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139 | }>>>=>>=> |