mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-25 17:12:03 +00:00
31 lines
1.4 KiB
Markdown
31 lines
1.4 KiB
Markdown
|
url: https://github.com/ridiculousfish/widecharwidth
|
||
|
|
commit: 62edda3d435392bf84c7db59f01f53370bbb1715
|
||
|
|
|
||
|
|
widecharwidth is a Python script that outputs a C++11 header-only implementation of `wcwidth()`, by downloading and parsing the latest `UnicodeData.txt`, `EastAsianWidth.txt`, and `emoji-data.txt`.
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
You may directly copy and use the included `widechar_width.h`.
|
||
|
|
|
||
|
|
This header contains a single public function `widechar_wcwidth()`. This returns either a positive width value (1 or 2), or a negative value such as `widechar_private_use`. Note that there are several possible negative return values, to distinguish among different scenarios.
|
||
|
|
|
||
|
|
If you aren't sure how to handle negative return values, try this table:
|
||
|
|
|
||
|
|
| return value | width |
|
||
|
|
|-------------------------|---|
|
||
|
|
| `widechar_nonprint` | 0 |
|
||
|
|
| `widechar_combining` | 0 |
|
||
|
|
| `widechar_ambiguous` | 1 |
|
||
|
|
| `widechar_private_use` | 1 |
|
||
|
|
| `widechar_unassigned` | 0 |
|
||
|
|
| `widechar_widened_in_9` | 2 (or maybe 1, renderer dependent) |
|
||
|
|
|
||
|
|
## Regenerating the header
|
||
|
|
|
||
|
|
To regenerate the header, run `make`. This will download and parse the relevant files, and run tests.
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
widecharwidth and its output headers are released into the public domain. They may be used for any purpose without requiring attribution, or under the CC0 license if public domain is not available. See included LICENSE.
|
||
|
|
|