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| 1 /* | 1 /* |
| 2 * Copyright (C) 2010 Adam Barth. All rights reserved. | 2 * Copyright (C) 2010 Adam Barth. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
| (...skipping 86 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 97 | 97 |
| 98 ChildrenVector children_; | 98 ChildrenVector children_; |
| 99 bool is_leaf_; | 99 bool is_leaf_; |
| 100 }; | 100 }; |
| 101 | 101 |
| 102 void Build(const String& text) { | 102 void Build(const String& text) { |
| 103 for (unsigned base = 0; base < text.length(); ++base) { | 103 for (unsigned base = 0; base < text.length(); ++base) { |
| 104 Node* current = &root_; | 104 Node* current = &root_; |
| 105 unsigned limit = std::min(base + depth_, text.length()); | 105 unsigned limit = std::min(base + depth_, text.length()); |
| 106 for (unsigned offset = 0; base + offset < limit; ++offset) { | 106 for (unsigned offset = 0; base + offset < limit; ++offset) { |
| 107 ASSERT(current != &leaf_); | 107 DCHECK_NE(current, &leaf_); |
| 108 Node*& child = current->at(Codebook::CodeWord(text[base + offset])); | 108 Node*& child = current->at(Codebook::CodeWord(text[base + offset])); |
| 109 if (!child) | 109 if (!child) |
| 110 child = base + offset + 1 == limit ? &leaf_ : new Node(); | 110 child = base + offset + 1 == limit ? &leaf_ : new Node(); |
| 111 current = child; | 111 current = child; |
| 112 } | 112 } |
| 113 } | 113 } |
| 114 } | 114 } |
| 115 | 115 |
| 116 Node root_; | 116 Node root_; |
| 117 unsigned depth_; | 117 unsigned depth_; |
| 118 | 118 |
| 119 // Instead of allocating a fresh empty leaf node for ever leaf in the tree | 119 // Instead of allocating a fresh empty leaf node for ever leaf in the tree |
| 120 // (there can be a lot of these), we alias all the leaves to this "static" | 120 // (there can be a lot of these), we alias all the leaves to this "static" |
| 121 // leaf node. | 121 // leaf node. |
| 122 Node leaf_; | 122 Node leaf_; |
| 123 }; | 123 }; |
| 124 | 124 |
| 125 } // namespace blink | 125 } // namespace blink |
| 126 | 126 |
| 127 #endif // SuffixTree_h | 127 #endif // SuffixTree_h |
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