@yuhere/js-ieee754

[!NOTE] This project is forked from feross/ieee754 v1.2.1. The main changes are: source rewritten in TypeScript, repackaged as ES Module with Vite + Vitest.

Read/write IEEE754 floating point numbers from/to a Buffer or array-like object.

Differences from upstream

| Aspect | Upstream | This fork | |--------|----------|-----------| | Module format | CommonJS | ES Module | | Source language | JavaScript | TypeScript | | Build tool | None | Vite 8 (preserveModules) | | Type declarations | Hand-written index.d.ts | Auto-generated from tsc | | Test framework | tape | Vitest 4 (Node) | | Test language | JavaScript | TypeScript | | Coverage | None | Istanbul (100%) |

Detailed changes

1. ESM — exports.read/write → export function read/write, added "type": "module" and "exports" field to package.json
2. TypeScript — converted src/index.js to src/index.ts with full type annotations, var → let/const
3. Build — Vite with preserveModules compiles to lib/, tsc generates .d.ts and declaration maps
4. Tests — switched from tape to Vitest with globals: true, Istanbul coverage at 100% (statements, branches, functions, lines)
5. Dev tooling — removed mocha, airtap, standard, tape; added Vite + Vitest + TypeScript stack

install

npm install @yuhere/js-ieee754

methods

import { read, write } from '@yuhere/js-ieee754'

read(buffer, offset, isLE, mLen, nBytes)

Read an IEEE754 floating point number from a buffer.

write(buffer, value, offset, isLE, mLen, nBytes)

Write a floating point number into a buffer using IEEE754 format.

Arguments:

• buffer — the buffer (Uint8Array)
• offset — offset into the buffer
• value — value to set (only for write)
• isLE — is little endian?
• mLen — mantissa length (float32: 23, float64: 52)
• nBytes — number of bytes (float32: 4, float64: 8)

what is ieee754?

The IEEE Standard for Floating-Point Arithmetic (IEEE 754) is a technical standard for floating-point computation. Read more.

license

BSD 3 Clause. Copyright (c) 2008, Fair Oaks Labs, Inc.