Function isZeroFilled

test/node/test-buffer-zero-fill-cli.js:12–16

(buf)

const assert = require('assert');

function isZeroFilled(buf) {
  for (let n = 0; n < buf.length; n++)
    if (buf[n] > 0) return false;
  return true;
}

// This can be somewhat unreliable because the
// allocated memory might just already happen to