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MIT License | ||
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Copyright (c) 2021 Oleg Gromov ([email protected]) | ||
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Permission is hereby granted, free of charge, to any person obtaining a copy | ||
of this software and associated documentation files (the "Software"), to deal | ||
in the Software without restriction, including without limitation the rights | ||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
copies of the Software, and to permit persons to whom the Software is | ||
furnished to do so, subject to the following conditions: | ||
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The above copyright notice and this permission notice shall be 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, EXPRESS OR | ||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
SOFTWARE. |
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# bitwise-options - a value packing library | ||
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This library allows you to pack **boolean** and **unsigned integer** values into a single 32-bit integer value. | ||
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You may use this to: | ||
- compactly store flags in a URL: consider `?first=true&third=true&fourth=true` vs `?flags=13` - the latter is exactly the same presented as bits in a 4-bit integer: `1101` | ||
- pack multiple numeric values bound to `[0, 2^size in bits - 1]` into a single one | ||
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Or anything else really. Let me know (or make a PR) if you find any interesting use cases for the library - I'll include it in this README. | ||
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## Installation | ||
`npm install bitwise-options` | ||
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or | ||
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`yarn install bitwise-options` | ||
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## Usage | ||
```(js) | ||
import BitwiseOptions from 'bitwise-options'; | ||
// Configure available options | ||
const options = new BitwiseOptions([ | ||
{name: 'boolean'}, // single-bit boolean by default | ||
{name: 'uint_single', type: 'uint'}, // single-bit unsigned int | ||
{name: 'uint_3bit', type: 'uint', size: 3}, // 3-bit unsigned integer in range of [0, 7] | ||
]); | ||
options.read(26); // 11010 in binary | ||
console.log( | ||
options.get('boolean'), // false | ||
options.get('uint_single'), // 1 | ||
options.get('uint_3bit'), // 6 | ||
); | ||
options.set('uint_3bit', 0); | ||
console.log( | ||
options.get('uint_3bit'), // 0 | ||
); | ||
console.log( | ||
options.toNumber(), // 2 | ||
); | ||
``` | ||
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The library is written in TypeScript so you may benefit from built-in typings if you use TS in your project, or just use an IDE supporting static typicing, such as VSCode. | ||
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### Verbosity | ||
Since bitwise operations and compact presentation of your options is really hard to debug, library throws errors here and there. | ||
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Watch out for those. |
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{ | ||
"name": "bitwise-options", | ||
"version": "1.0.0", | ||
"description": "", | ||
"version": "0.5.0", | ||
"description": "Value packing library", | ||
"main": "index.js", | ||
"scripts": { | ||
"build": "tsc", | ||
"build": "tsc --build", | ||
"test": "jest" | ||
}, | ||
"prepublish": "tsc", | ||
"files": ["dist"], | ||
"prepublish": "tsc --build", | ||
"publishConfig": { | ||
"access": "public" | ||
}, | ||
"keywords": [], | ||
"author": "", | ||
"license": "ISC", | ||
"license": "MIT", | ||
"types": "index.d.ts", | ||
"devDependencies": { | ||
"@types/jest": "^26.0.23", | ||
"@types/node": "^15.0.3", | ||
"jest": "^26.6.3", | ||
"ts-jest": "^26.5.6", | ||
"ts-node": "^9.1.1", | ||
"typescript": "^4.2.4" | ||
} | ||
} |
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{ | ||
"compilerOptions": { | ||
/* Basic Options */ | ||
"target": "es5", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */ | ||
"module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */ | ||
// "lib": [], /* Specify library files to be included in the compilation. */ | ||
// "allowJs": true, /* Allow javascript files to be compiled. */ | ||
// "checkJs": true, /* Report errors in .js files. */ | ||
// "jsx": "preserve", /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */ | ||
"declaration": true, /* Generates corresponding '.d.ts' file. */ | ||
// "declarationMap": true, /* Generates a sourcemap for each corresponding '.d.ts' file. */ | ||
// "sourceMap": true, /* Generates corresponding '.map' file. */ | ||
// "outFile": "./", /* Concatenate and emit output to single file. */ | ||
"outDir": "./dist", /* Redirect output structure to the directory. */ | ||
// "rootDir": "./", /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */ | ||
// "composite": true, /* Enable project compilation */ | ||
// "removeComments": true, /* Do not emit comments to output. */ | ||
// "noEmit": true, /* Do not emit outputs. */ | ||
// "importHelpers": true, /* Import emit helpers from 'tslib'. */ | ||
// "downlevelIteration": true, /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */ | ||
// "isolatedModules": true, /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */ | ||
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/* Strict Type-Checking Options */ | ||
"strict": true, /* Enable all strict type-checking options. */ | ||
// "noImplicitAny": true, /* Raise error on expressions and declarations with an implied 'any' type. */ | ||
// "strictNullChecks": true, /* Enable strict null checks. */ | ||
// "strictFunctionTypes": true, /* Enable strict checking of function types. */ | ||
// "strictPropertyInitialization": true, /* Enable strict checking of property initialization in classes. */ | ||
// "noImplicitThis": true, /* Raise error on 'this' expressions with an implied 'any' type. */ | ||
// "alwaysStrict": true, /* Parse in strict mode and emit "use strict" for each source file. */ | ||
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/* Additional Checks */ | ||
// "noUnusedLocals": true, /* Report errors on unused locals. */ | ||
// "noUnusedParameters": true, /* Report errors on unused parameters. */ | ||
// "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */ | ||
// "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */ | ||
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/* Module Resolution Options */ | ||
// "moduleResolution": "node", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */ | ||
// "baseUrl": "./", /* Base directory to resolve non-absolute module names. */ | ||
// "paths": {}, /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */ | ||
// "rootDirs": [], /* List of root folders whose combined content represents the structure of the project at runtime. */ | ||
// "typeRoots": [], /* List of folders to include type definitions from. */ | ||
// "types": [], /* Type declaration files to be included in compilation. */ | ||
// "allowSyntheticDefaultImports": true, /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */ | ||
"esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */ | ||
// "preserveSymlinks": true, /* Do not resolve the real path of symlinks. */ | ||
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/* Source Map Options */ | ||
// "sourceRoot": "./", /* Specify the location where debugger should locate TypeScript files instead of source locations. */ | ||
// "mapRoot": "./", /* Specify the location where debugger should locate map files instead of generated locations. */ | ||
// "inlineSourceMap": true, /* Emit a single file with source maps instead of having a separate file. */ | ||
// "inlineSources": true, /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */ | ||
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/* Experimental Options */ | ||
// "experimentalDecorators": true, /* Enables experimental support for ES7 decorators. */ | ||
// "emitDecoratorMetadata": true, /* Enables experimental support for emitting type metadata for decorators. */ | ||
"target": "es5", | ||
"module": "commonjs", | ||
"moduleResolution": "node", | ||
"lib": ["es6", "es2015"], | ||
"types": ["node"], | ||
"declaration": true, | ||
"outDir": "./dist", | ||
"rootDir": "./src", | ||
"strict": true, | ||
"esModuleInterop": true | ||
}, | ||
"include": [ | ||
"src/*.ts", | ||
], | ||
"exclude": [ | ||
"src/*.test.ts", | ||
"node_modules", | ||
"dist" | ||
"dist", | ||
] | ||
} |