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javascriptnode.jsieee-754

Parse HEX float

I have integer, for example, 4060.

How I can get HEX float (\x34\xC8\x7D\x45) from it?

JS hasn't float type, so I don't know how to do this conversion.

Thank you.

Solution

  • The above answer is no longer valid. Buffer has been deprecated (see https://nodejs.org/api/buffer.html#buffer_new_buffer_size).

    New Solution:

    function numToFloat32Hex(v,le)
{
    if(isNaN(v)) return false;
    var buf = new ArrayBuffer(4);
    var dv  = new DataView(buf);
    dv.setFloat32(0, v, true);
    return ("0000000"+dv.getUint32(0,!(le||false)).toString(16)).slice(-8).toUpperCase();
}

    For example:

    numToFloat32Hex(4060,true) // returns "00C07D45"
numToFloat32Hex(4060,false) // returns "457DC000"

    Tested in Chrome and Firefox