Buffer + writeUInt32LE from NodeJS to Javascript

Question

So I have this function, comming from a NodeJS script:

function WearToFloat(value)
{
    buf = new Buffer(4);
    buf.writeUInt32LE(+value, 0);
    return buf.readFloatLE(0).toString();
}

and I need to translate this in pure Javascript that can be read by any web browser.

Unfortunately, I have absolutely no knowledge in NodeJS nor buffers in JS, and can't figure out with docs.

The aim of this function is to convert a value that looks like 1054356424 into a float number from 0 to 1 (in this case, 0.4222700595855713)

Any clue?

Edit: Seems that the same kind of question has been asked here but only using a library, and I don't want to load a full library just for that, there must be a simple way to convert this NodeJS function into a Javascript one.

Possible duplicate of [Convert nodejs' Buffer to browsers' javascript](http://stackoverflow.com/questions/8880571/convert-nodejs-buffer-to-browsers-javascript) — Ismail RBOUH, Jul 23 '16 at 14:27

rAthus · Accepted Answer · 2016-07-25T07:37:29.900

1

Found!

function WearToFloat(value)
{
    var buffer = new ArrayBuffer(4);
    var dataview = new DataView(buffer);
    dataView.setUint32(0,value);
    return dataView.getFloat32(0);
}

edited Jul 25 '16 at 07:37

answered Jul 23 '16 at 15:07

rAthus

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9
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1

You might need to set `setUInt32` 3rd parameter to true in order to switch endianness behaviour to "Little endian". Doc says, by default Big endian is assumed. Same goes for getFloat32 with its 2nd parameter. `;)` – Stphane Jul 23 '16 at 15:26

Buffer + writeUInt32LE from NodeJS to Javascript

1 Answers1