28 lines
1.3 KiB
Markdown
28 lines
1.3 KiB
Markdown
# Xcdat: xor-compressed double-array trie
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Xcdat is a C++ library that implements static compressed string dictionaries based on an improved double-array trie.
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The double array is known as the fastest trie representation and has been used in many trie libraries. On the other hand, it has a space efficiency problem because of a pointer-based data structure. Xcdat solves the problem using the XOR-compressed double-array methods described in the following article.
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> Shunsuke Kanda, Kazuhiro Morita, and Masao Fuketa. Compressed double-array tries for string dictionaries supporting fast lookup. Knowledge and Information Systems, 51(3): 1023–1042, 2017. [[doi](https://doi.org/10.1007/s10115-016-0999-8)] [[pdf](https://drive.google.com/file/d/1_BknOv1misIK-iUk4u9c9yZi3qmWNruf/view?usp=sharing)]
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Xcdat can implement trie dictionaries in smaller space compared to the other double-array libraries. In addition, the lookup speed is relatively fast in compressed data structures from the double-array advantage.
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## Documentation
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The document of Xcdat is [here](https://kampersanda.github.io/xcdat/).
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## Build Instructions
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You can download and compile Xcdat as the following commands.
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```
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$ git clone https://github.com/kampersanda/xcdat.git
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$ cd xcdat
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$ mkdir build
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$ cd build
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$ cmake ..
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$ make
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$ make install
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```
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