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 — Ismail RBOUH
– Ismail RBOUH, Commented Jul 23, 2016 at 14:27

aggregate1166877 · Accepted Answer · 2024-05-02 02:48:30Z

2

Found!

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

edited May 2, 2024 at 2:48

aggregate1166877

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answered Jul 23, 2016 at 15:07

rAthus

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1 Comment

Stphane Over a year ago

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. ;)

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