pb2204/int64-node

int64-node is a JavaScript library that provides support for handling 64-bit integer numbers in Node.js.

int64-node

int64-node is a JavaScript library that provides support for handling 64-bit integer numbers in Node.js. JavaScript's native Numbers are represented as IEEE 754 double-precision floats, which limits the range of values that can be accurately represented to ±2^53. For projects requiring precise 64-bit integer handling, such as node-thrift, int64-node comes to the rescue.

Table of Contents

• Installation
• Usage
• License
• Contributing
• Learning
• Code of Conduct
• Developer Details

Installation

You can install int64-node via npm:

npm install int64-node

Usage

Creating Int64 Instances

// Require the int64-node module
const Int64 = require('int64-node');

// Create Int64 instances
const int1 = new Int64(0x12345678, 0x9abcdef0);
const int2 = new Int64('123456789abcdef0');

Performing Arithmetic Operations

// Perform arithmetic operations
const result1 = int1 + 1; // 4886718346
const result2 = int2 + 1; // Infinity

Converting to Different Representations

// Convert to different representations
const octetString1 = int1.toOctetString(); // '0000000123456789'
const octetString2 = int2.toOctetString(); // '123456789abcdef0'
const binaryString1 = int1.toString(2); // '100100011010001010110011110001001'
const binaryString2 = int2.toString(2); // 'Infinity'

Checking Integer Precision

// Check if the value is within integer-precise range
const isInt1Finite = isFinite(int1); // true
const isInt2Finite = isFinite(int2); // false

Copying to a Buffer

// Copy to a buffer
const buffer1 = int1.toBuffer(); // <Buffer 12 34 56 78 9a bc de f0>
const buffer2 = new Buffer(16);
int2.copy(buffer2, 0); // Copies the Int64 value to the buffer

Creating Int64 Instances from a Buffer

// Create Int64 instances from a Buffer
const intFromBuffer = new Int64(new Buffer([0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0]));

// Create Int64 instances from a Buffer with an offset
const intFromOffset = new Int64(new Buffer([0, 0, 0, 0, 0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0]), 4);

License

int64-node is licensed under the MIT License. See LICENSE for details.

Contributing

Interested in contributing? Please read our Contributing Guidelines for more information.

Learning

Explore our Learning Resources to get started with int64-node.

Code of Conduct

Please follow our Code of Conduct to ensure a welcoming and inclusive community.

Developer Details

• Author: Pabitra Banerjee
• Email: [email protected]
• GitHub: PB2204

Happy Coding 🚀

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