{"id":12721,"library":"cuint","title":"C-like Unsigned Integers","description":"The `cuint` library provides functionality for handling C-like unsigned 32-bit and 64-bit integers in JavaScript, a capability not natively supported by the language. It represents unsigned integers as objects, splitting them into 16-bit segments (e.g., two for UINT32, four for UINT64) to emulate fixed-width arithmetic. Designed for performance, it aims to provide C-like behavior, including truncation on overflow. The current and only stable version is 0.2.2, last updated approximately 9 years ago (as of 2026). Due to its age and lack of updates, it is considered an abandoned project, meaning it likely does not receive bug fixes, security patches, or compatibility updates for newer JavaScript environments or Node.js versions. Its primary differentiator was bringing explicit unsigned integer arithmetic to JavaScript before `BigInt` was standardized.","status":"abandoned","version":"0.2.2","language":"javascript","source_language":"en","source_url":"https://github.com/pierrec/js-cuint","tags":["javascript","C","unsigned","integer","32bits","64bits"],"install":[{"cmd":"npm install cuint","lang":"bash","label":"npm"},{"cmd":"yarn add cuint","lang":"bash","label":"yarn"},{"cmd":"pnpm add cuint","lang":"bash","label":"pnpm"}],"dependencies":[],"imports":[{"note":"Primarily designed for CommonJS. For browser usage, include `uint32.js` via a `<script>` tag to expose `UINT32` globally. Native ESM import syntax is not supported and will likely result in an error or require a transpilation step.","wrong":"import { UINT32 } from 'cuint';","symbol":"UINT32","correct":"const { UINT32 } = require('cuint');"},{"note":"Similar to `UINT32`, `UINT64` is exposed via CommonJS `require()` or globally in the browser when `uint64.js` (or a combined build) is included.","wrong":"import { UINT64 } from 'cuint';","symbol":"UINT64","correct":"const { UINT64 } = require('cuint');"},{"note":"When used in a browser environment by including the build script, `UINT32` is directly available as a global variable. No explicit import or `require` is needed in this context.","wrong":"import { UINT32 } from 'cuint/build/uint32.js';","symbol":"UINT32 (Browser Global)","correct":"// After including <script src=\"/your/path/to/uint32.js\"></script>\nconst val = UINT32('326648991');"}],"quickstart":{"code":"// In Node.js environment\nconst { UINT32, UINT64 } = require('cuint');\n\n// Instantiate a 32-bit unsigned integer\nconst thirtyTwoBitValue = UINT32('4294967290'); // Close to max 32-bit unsigned value\nconsole.log(`Initial UINT32 value: ${thirtyTwoBitValue.toString()}`);\n\n// Instantiate another 32-bit value\nconst smallThirtyTwoBitValue = UINT32(10);\n\n// Perform an addition (modifies thirtyTwoBitValue in place)\nthirtyTwoBitValue.add(smallThirtyTwoBitValue);\nconsole.log(`UINT32 after adding 10: ${thirtyTwoBitValue.toString()}`); // Will demonstrate truncation if it overflows\n\n// Instantiate a 64-bit unsigned integer\nconst sixtyFourBitValue = UINT64('18446744073709551600'); // Close to max 64-bit unsigned value\nconsole.log(`Initial UINT64 value: ${sixtyFourBitValue.toString()}`);\n\n// Instantiate another 64-bit value\nconst smallSixtyFourBitValue = UINT64(15);\n\n// Perform an addition (modifies sixtyFourBitValue in place)\nsixtyFourBitValue.add(smallSixtyFourBitValue);\nconsole.log(`UINT64 after adding 15: ${sixtyFourBitValue.toString()}`);\n\n// Demonstrate cloning for immutable operations\nconst originalValue = UINT32(100);\nconst addedValue = UINT32(50);\nconst resultValue = originalValue.clone().add(addedValue);\nconsole.log(`Original value (immutable check): ${originalValue.toString()}`); // Should still be 100\nconsole.log(`Result of clone().add(): ${resultValue.toString()}`); // Should be 150","lang":"javascript","description":"Demonstrates importing `UINT32` and `UINT64` in Node.js, instantiating unsigned integer objects, performing in-place addition, and showcasing the `clone()` method for immutable operations, highlighting the library's C-like behavior with fixed-width arithmetic."},"warnings":[{"fix":"Always call `.clone()` on the original object before performing operations if you need to preserve the original value, e.g., `z = x.clone().add(y)`.","message":"Methods modify the object in place, requiring explicit `.clone()` for immutable operations. This behavior is C-like but non-idiomatic for typical JavaScript object operations.","severity":"breaking","affected_versions":">=0.2.0"},{"fix":"Consider using JavaScript's native `BigInt` for arbitrary precision integers or a more actively maintained library for fixed-width integer arithmetic if modern environments and security are concerns.","message":"The library is abandoned and has not been updated in over 9 years. This means it may have compatibility issues with newer Node.js versions, JavaScript engines, or security vulnerabilities that will not be patched.","severity":"gotcha","affected_versions":"*"},{"fix":"Be aware of the truncation behavior. Implement explicit checks if specific overflow handling (e.g., throwing an error) is required, rather than relying solely on the library's default behavior.","message":"Overflows are handled by C-like truncation to the respective 32-bit or 64-bit limit. This differs significantly from JavaScript's standard number behavior or `BigInt`'s arbitrary precision, which might lead to unexpected results if not accounted for.","severity":"gotcha","affected_versions":"*"},{"fix":"In CommonJS environments, use `const { UINT32 } = require('cuint');`. In ESM, you may need dynamic `import()` or to configure your build system to handle CJS modules, or use a tool like `esm` for Node.js.","message":"The package does not provide native ES Module (ESM) exports. Direct `import ... from 'cuint'` syntax will not work in ESM-only Node.js environments or modern browser module contexts without a transpilation step.","severity":"gotcha","affected_versions":"*"}],"env_vars":null,"last_verified":"2026-04-19T00:00:00.000Z","next_check":"2026-07-18T00:00:00.000Z","problems":[{"fix":"In Node.js: `const { UINT32 } = require('cuint');`. In browser: ensure `<script src='/path/to/uint32.js'></script>` is present and loaded before usage.","cause":"Attempting to use `UINT32` in Node.js without `require('cuint')` or in a browser without including the build script.","error":"ReferenceError: UINT32 is not defined"},{"fix":"Ensure the variable is correctly instantiated with `UINT32(...)` or `UINT64(...)` and that method calls are chained correctly or called on valid instances.","cause":"Trying to call a method like `.add()` on a variable that is not an instance of `UINT32` or `UINT64`, possibly due to incorrect instantiation or a lost `this` context.","error":"TypeError: Cannot read properties of undefined (reading 'add')"},{"fix":"Use CommonJS `require()` syntax: `const { UINT32 } = require('cuint');`.","cause":"Attempting to use ES Module `import { UINT32 } from 'cuint';` syntax with an abandoned CommonJS-only package in an ESM context.","error":"SyntaxError: Named export 'UINT32' not found. The requested module 'cuint' does not provide an export named 'UINT32'"},{"fix":"Call `UINT32()` or `UINT64()` directly without the `new` keyword, e.g., `const value = UINT32(123);`.","cause":"Trying to use `new UINT32(...)` instead of `UINT32(...)` as the library's functions are factory functions, not traditional constructors.","error":"TypeError: UINT32 is not a constructor"}],"ecosystem":"npm"}