https://github.com/vmg/libewok

EWAH Compressed Bitmaps
https://github.com/vmg/libewok

Last synced: about 2 months ago
JSON representation

EWAH Compressed Bitmaps

• Host: GitHub
• URL: https://github.com/vmg/libewok
• Owner: vmg
• Created: 2013-05-17T23:08:52.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2020-09-25T10:27:11.000Z (almost 4 years ago)
• Last Synced: 2024-04-06T08:34:22.124Z (6 months ago)
• Language: C
• Size: 192 KB
• Stars: 25
• Watchers: 5
• Forks: 9
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
libewok

=======

EWAH Compressed bitmaps in C.

Usage

-----

```c

struct ewah_bitmap *array = ewah_bitmap_new();

struct ewah_iterator it;

eword_t word;

ewah_bitmap_set(array, 3);

ewah_bitmap_set(array, 32);

ewah_bitmap_set(array, 48);

ewah_bitmap_set(array, 63);

ewah_bitmap_set(array, 1024);

ewah_bitmap_set(array, 7600);

ewah_iterator_init(&it, array);

while (ewah_iterator_next(&word, &it))

    printf("%08llX ", word);

ewah_bitmap_each_bit(array, &print_a_bit, NULL);

ewah_bitmap_free(array);

````

Related docs:

------------

- https://github.com/lemire/EWAHBoolArray

- https://github.com/lemire/javaewah

- http://arxiv.org/abs/0901.3751

- http://www.slideshare.net/lemire/all-about-bitmap-indexes-and-sorting-them

License

-------

This port is based off the original EWAHBoolArray implementation by Daniel Lemire and it's licensed under the terms of the GPLv2, with the original author's permission.

Original contributors as follows:

- Daniel Lemire (http://lemire.me/en/), 

- Cliff Moon (https://github.com/cliffmoon), 

- David McIntosh (https://github.com/mctofu),

- Robert Becho (https://github.com/RBecho),

- Colby Ranger (https://github.com/crangeratgoogle)

- Veronika Zenz (https://github.com/veronikazenz)