JavaScript buffer Buffer.unpack Examples

Example #1

File: test-buffer.js Project: cbrumelle/node

  assert.equal(50, slice.length);
  for (var i = 0; i < 50; i++) {
    assert.equal(b[100+i], slice[i]);
  }
}


// unpack

var b = new Buffer(10);
b[0] = 0x00;
b[1] = 0x01;
b[2] = 0x03;
b[3] = 0x00;

assert.deepEqual([0x0001], b.unpack('n', 0));
assert.deepEqual([0x0001, 0x0300], b.unpack('nn', 0));
assert.deepEqual([0x0103], b.unpack('n', 1));
assert.deepEqual([0x0300], b.unpack('n', 2));
assert.deepEqual([0x00010300], b.unpack('N', 0));
assert.throws(function () {
  b.unpack('N', 8);
});

b[4] = 0xDE;
b[5] = 0xAD;
b[6] = 0xBE;
b[7] = 0xEF;

assert.deepEqual([0xDEADBEEF], b.unpack('N', 4));

Example #2

File: test-buffer.js Project: cbrumelle/node

assert.throws(function () {
  b.unpack('N', 8);
});

Example #3

File: test-buffer.js Project: moos/node-soup

  assert.equal(50, slice.length);
  for (var i = 0; i < 50; i++) {
    assert.equal(b[100+i], slice[i]);
  }
}


// unpack

var b = new Buffer(10);
b[0] = 0x00;
b[1] = 0x01;
b[2] = 0x03;
b[3] = 0x00;

assert.deepEqual([0x0001], b.unpack('n', 0));
assert.deepEqual([0x0001, 0x0300], b.unpack('nn', 0));
assert.deepEqual([0x0103], b.unpack('n', 1));
assert.deepEqual([0x0300], b.unpack('n', 2));
assert.deepEqual([0x00010300], b.unpack('N', 0));
assert.throws(function () {
  b.unpack('N', 8);
});

b[4] = 0xDE;
b[5] = 0xAD;
b[6] = 0xBE;
b[7] = 0xEF;

assert.deepEqual([0xDEADBEEF], b.unpack('N', 4));
assert.deepEqual([0xDEAD], b.unpack('n', 4));		// node-soup!