(arr, val, byteOffset, encoding, dir)
| 2571 | } |
| 2572 | |
| 2573 | function arrayIndexOf (arr, val, byteOffset, encoding, dir) { |
| 2574 | var indexSize = 1; |
| 2575 | var arrLength = arr.length; |
| 2576 | var valLength = val.length; |
| 2577 | |
| 2578 | if (encoding !== undefined) { |
| 2579 | encoding = String(encoding).toLowerCase(); |
| 2580 | if (encoding === 'ucs2' || encoding === 'ucs-2' || |
| 2581 | encoding === 'utf16le' || encoding === 'utf-16le') { |
| 2582 | if (arr.length < 2 || val.length < 2) { |
| 2583 | return -1 |
| 2584 | } |
| 2585 | indexSize = 2; |
| 2586 | arrLength /= 2; |
| 2587 | valLength /= 2; |
| 2588 | byteOffset /= 2; |
| 2589 | } |
| 2590 | } |
| 2591 | |
| 2592 | function read (buf, i) { |
| 2593 | if (indexSize === 1) { |
| 2594 | return buf[i] |
| 2595 | } else { |
| 2596 | return buf.readUInt16BE(i * indexSize) |
| 2597 | } |
| 2598 | } |
| 2599 | |
| 2600 | var i; |
| 2601 | if (dir) { |
| 2602 | var foundIndex = -1; |
| 2603 | for (i = byteOffset; i < arrLength; i++) { |
| 2604 | if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) { |
| 2605 | if (foundIndex === -1) foundIndex = i; |
| 2606 | if (i - foundIndex + 1 === valLength) return foundIndex * indexSize |
| 2607 | } else { |
| 2608 | if (foundIndex !== -1) i -= i - foundIndex; |
| 2609 | foundIndex = -1; |
| 2610 | } |
| 2611 | } |
| 2612 | } else { |
| 2613 | if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength; |
| 2614 | for (i = byteOffset; i >= 0; i--) { |
| 2615 | var found = true; |
| 2616 | for (var j = 0; j < valLength; j++) { |
| 2617 | if (read(arr, i + j) !== read(val, j)) { |
| 2618 | found = false; |
| 2619 | break |
| 2620 | } |
| 2621 | } |
| 2622 | if (found) return i |
| 2623 | } |
| 2624 | } |
| 2625 | |
| 2626 | return -1 |
| 2627 | } |
| 2628 | |
| 2629 | Buffer.prototype.includes = function includes (val, byteOffset, encoding) { |
| 2630 | return this.indexOf(val, byteOffset, encoding) !== -1 |
no test coverage detected