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December 18, 2022 00:24
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Javascript bitf*ckery because I hate bits and reading data sheets for i2c stuffs and I'm also jealous of python etc
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// console.log(bitmagic("b[1010]d[3,2]h[02,2]")); | |
// console.log(bitmagic("b[10]d[1,2]h[0A]")); | |
/** | |
* Bitmagic the Freewheelin' bitmiser | |
* | |
* Use any combination of bits, numbers or hex and output a nice-lookin' byte | |
* | |
* Usage: b[binary]d[decimal,padding?]h[hex,padding?] | |
* | |
* b[1010]d[3,2]h[02,2] = 10101110 | |
* b[10]d[1,2]h[0A] = 10011010 | |
* | |
* {b, d, h} | |
*/ | |
function bitmagic(str) { | |
let matches = [...str.matchAll(/([dbh]{1})\[([^\]]+)\]/g)]; | |
let b = matches.reduce((a, e) => { | |
let [val, pad] = e[2].split(','); | |
if (e[1] === "b") { | |
// nothing to do | |
a += `${val}`; | |
} else if (e[1] === "d") { | |
a += (val >>> 0).toString(2).padStart(pad ? pad : 0, '0'); | |
} else if (e[1] === "h") { | |
a += `${parseInt(val, 16).toString(2).padStart(pad ? pad : 0, '0')}` | |
} | |
return a; | |
}, ""); | |
return {b: b, d: parseInt(b, 2), h: '0x' + parseInt(b,2).toString(16)}; | |
} |
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