the front and back end communicates with websocket. How does the front end convert long data into ArrayBuffer 64-bit binary data
the front and back end communicates with websocket. How does the front end convert long data into ArrayBuffer 64-bit binary data
just started to use bit operation, all the way up to 64 bits, but found that js bit operation can only reach 31 bits. And then higher is another loop.
so I think of converting the decimal to hexadecimal, and then taking the high bit and doing it again
function long2bin(p) {
var r = new ArrayBuffer(8);
r[7] = p & 0xff;
r[6] = p >> 8 & 0xff;
r[5] = p >> 16 & 0xff;
r[4] = p >> 24 & 0xff;
p = p.toString(16); //16,
if (p.length <= 8) {
return r;
}
p = parseInt(p.substr(0, p.length - 8),16);//,int
r[3] = p & 0xff;
r[2] = p >> 8 & 0xff;
r[1] = p >> 16 & 0xff;
r[0] = p >> 24 & 0xff;
return r;
}
var l = 1234567891011;
long2bin(l);var num = 12
var ab = new ArrayBuffer(1)
ab[0] = numPrevious: How to puppetter automatically, download the exe file and save it
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