104 lines
4.3 KiB
Markdown
104 lines
4.3 KiB
Markdown
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# endianness
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Copyright (c) 2017-2018 Rafael da Silva Rocha.
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https://github.com/rochars/endianness
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[](https://www.npmjs.com/package/endianness) [](https://rochars.github.io/endianness/docs/index.html) [](https://rochars.github.io/endianness/test/dist/browser.html)
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[](https://codecov.io/gh/rochars/endianness) [](https://travis-ci.org/rochars/endianness) [](https://ci.appveyor.com/project/rochars/endianness) [](https://scrutinizer-ci.com/g/rochars/endianness/)
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Swap endianness in byte arrays. The input buffer is modified in place.
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- **MIT licensed**
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- **Compatible with IE6+ and browsers that support ES3/ES5/ES6+**
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- **Use it out of the box in Node.js**
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- **Use it out of the box with [TypeScript](https://www.typescriptlang.org/)**
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- **Use it with any byte offset**
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- **Swap entire buffers**
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- **Swap only a slice of the buffer**
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## Install
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```
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npm install endianness
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```
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## Use
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### Browser
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Use **endianness.umd.js**:
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```html
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<script src="endianness.umd.js"></script>
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<script>
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var bytes = [64, 9, 33, 251, 84, 68, 45, 24];
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endianness(bytes, 8);
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console.log(bytes);
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</script>
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```
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Or get it from the [jsDelivr](https://www.jsdelivr.com/npm/endianness) CDN:
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```html
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<script src="https://cdn.jsdelivr.net/npm/endianness"></script>
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```
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Or get it from [unpkg](https://www.unpkg.com/endianness):
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```html
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<script src="https://unpkg.com/endianness"></script>
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```
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#### Browser compatibility
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**endianness.umd.js** is transpiled to ES3 and compatible with IE6+. Should work in all modern browsers that support ES3/ES5/ES6+.
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Cross-browser tests powered by
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<a href="https://www.browserstack.com"><img src="https://rochars.github.io/endianness/docs/Browserstack-logo@2x.png" width="150px"/></a>
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### Node
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Require or import **endianness** from **endianness**:
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```javascript
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import endianness from 'endianness';
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// Swap endianness of one 64-bit value:
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let bytes = [64, 9, 33, 251, 84, 68, 45, 24];
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endianness(bytes, 8);
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```
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```javascript
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const endianness = require("endianness");
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// Swap endianness of two 24-bit values:
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let bytes = new Uint8Array(["00", "00", "80", "ff", "ff", "7f"]);
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endianness(bytes, 3),
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```
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## API
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```javascript
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/**
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* Swap the byte ordering in a buffer. The buffer is modified in place.
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* @param {!Array<number|string>|!Uint8Array} bytes The bytes.
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* @param {number} offset The byte offset.
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* @param {number=} index The start index. Assumes 0.
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* @param {number=} end The end index. Assumes the buffer length.
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* @throws {Error} If the buffer length is not valid.
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*/
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function endianness(bytes, offset, index=0, end=bytes.length) {}
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```
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## LICENSE
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Copyright (c) 2017-2018 Rafael da Silva Rocha.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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