https://github.com/justjavac/deno_ieee754

Parse IEEE754 floating point numbers for Deno
https://github.com/justjavac/deno_ieee754

deno deno-mod deno-module deno-modules denomod ieee ieee754 math

Last synced: 12 days ago
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Parse IEEE754 floating point numbers for Deno

• Host: GitHub
• URL: https://github.com/justjavac/deno_ieee754
• Owner: justjavac
• License: mit
• Created: 2020-08-07T01:48:39.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2022-08-03T13:49:51.000Z (over 2 years ago)
• Last Synced: 2024-11-22T17:05:29.656Z (30 days ago)
• Topics: deno, deno-mod, deno-module, deno-modules, denomod, ieee, ieee754, math
• Language: TypeScript
• Homepage:
• Size: 22.5 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# deno_ieee754

[![tag](https://img.shields.io/github/release/justjavac/deno_ieee754)](https://github.com/justjavac/deno_ieee754/releases)

[![ci](https://github.com/justjavac/deno_ieee754/actions/workflows/ci.yml/badge.svg)](https://github.com/justjavac/deno_ieee754/actions/workflows/ci.yml)

[![license](https://img.shields.io/github/license/justjavac/deno_ieee754)](https://github.com/justjavac/deno_ieee754/blob/master/LICENSE)

Parse IEEE754 floating point numbers for Deno.

## Usage

```ts

import * as ieee754 from "https://deno.land/x/ieee754/mod.ts";

// or

// import read from "https://deno.land/x/ieee754/read.ts";

// import write from "https://deno.land/x/ieee754/write.ts";

const buf: Uint8Array = Uint8Array.of(0x42, 0x29, 0xae, 0x14);

const f64 = ieee754.read(buf, 0, false, 52, 8);

console.log(f64); // 42.42

const EPSILON = 0.00001;

const f32 = ieee754.read(buf, 0, false, 23, 4);

console.log(Math.abs(f32 - 42.42) < EPSILON); // true

```

Use with number array:

```ts

const arr: number[] = [1, 2, 3]; // a number array

const buf = Uint8Array.from(arr); // convert to `Uint8Array`

const num = ieee754.read(buf, 0, false, 23, 4);

```

## APIs

**read**:

```ts

/**

 * Read IEEE754 floating point numbers from a array.

 * @param buffer the buffer

 * @param offset offset into the buffer

 * @param isLE is little endian?

 * @param mLen mantissa length

 * @param nBytes number of bytes

 */

function read(

  buffer: Uint8Array,

  offset: number,

  isLE: boolean,

  mLen: number,

  nBytes: number,

): number;

```

**write**:

```ts

/**

 * Write IEEE754 floating point numbers to a array.

 * @param buffer the buffer

 * @param value value to set

 * @param offset offset into the buffer

 * @param isLE is little endian?

 * @param mLen mantissa length

 * @param nBytes number of bytes

 */

function write(

  buffer: Uint8Array,

  value: number,

  offset: number,

  isLE: boolean,

  mLen: number,

  nBytes: number,

): void;

```

### License

[deno_ieee754](https://github.com/justjavac/deno_ieee754) is released under the

MIT License. See the bundled [LICENSE](./LICENSE) file for details.