blob: a5a0b7ef551494ad29178ef6bebb208ff96751a3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
// Number of bits in the canvas that we randomize when canvas randomization is
// enabled.
const NUM_RANDOMIZED_CANVAS_BITS = 256;
/**
* Compares two Uint8Arrays and returns the number of bits that are different.
*
* @param {Uint8ClampedArray} arr1 - The first Uint8ClampedArray to compare.
* @param {Uint8ClampedArray} arr2 - The second Uint8ClampedArray to compare.
* @returns {number} - The number of bits that are different between the two
* arrays.
*/
function compareUint8Arrays(arr1, arr2) {
let count = 0;
for (let i = 0; i < arr1.length; i++) {
let diff = arr1[i] ^ arr2[i];
while (diff > 0) {
count += diff & 1;
diff >>= 1;
}
}
return count;
}
/**
* Compares two ArrayBuffer objects to see if they are different.
*
* @param {ArrayBuffer} buffer1 - The first buffer to compare.
* @param {ArrayBuffer} buffer2 - The second buffer to compare.
* @returns {boolean} True if the buffers are different, false if they are the
* same.
*/
function compareArrayBuffer(buffer1, buffer2) {
// compare the byte lengths of the two buffers
if (buffer1.byteLength !== buffer2.byteLength) {
return true;
}
// create typed arrays to represent the two buffers
const view1 = new DataView(buffer1);
const view2 = new DataView(buffer2);
// compare the byte values of the two typed arrays
for (let i = 0; i < buffer1.byteLength; i++) {
if (view1.getUint8(i) !== view2.getUint8(i)) {
return true;
}
}
// the two buffers are the same
return false;
}
|
