| 704 | }, |
| 705 | |
| 706 | extname(path) { |
| 707 | let startDot = -1 |
| 708 | let startPart = 0 |
| 709 | let end = -1 |
| 710 | let matchedSlash = true |
| 711 | // Track the state of characters (if any) we see before our first dot and |
| 712 | // after any path separator we find |
| 713 | let preDotState = 0 |
| 714 | for (let i = path.length - 1; i >= 0; --i) { |
| 715 | const code = path.charCodeAt(i) |
| 716 | if (code === 47 /*/*/) { |
| 717 | // If we reached a path separator that was not part of a set of path |
| 718 | // separators at the end of the string, stop now |
| 719 | if (!matchedSlash) { |
| 720 | startPart = i + 1 |
| 721 | break |
| 722 | } |
| 723 | continue |
| 724 | } |
| 725 | if (end === -1) { |
| 726 | // We saw the first non-path separator, mark this as the end of our |
| 727 | // extension |
| 728 | matchedSlash = false |
| 729 | end = i + 1 |
| 730 | } |
| 731 | if (code === 46 /*.*/) { |
| 732 | // If this is our first dot, mark it as the start of our extension |
| 733 | if (startDot === -1) { |
| 734 | startDot = i |
| 735 | } else if (preDotState !== 1) { |
| 736 | preDotState = 1 |
| 737 | } |
| 738 | } else if (startDot !== -1) { |
| 739 | // We saw a non-dot and non-path separator before our dot, so we should |
| 740 | // have a good chance at having a non-empty extension |
| 741 | preDotState = -1 |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | if ( |
| 746 | startDot === -1 || end === -1 || |
| 747 | // We saw a non-dot character immediately before the dot |
| 748 | preDotState === 0 || |
| 749 | // The (right-most) trimmed path component is exactly '..' |
| 750 | preDotState === 1 && startDot === end - 1 && startDot === startPart + 1 |
| 751 | ) { |
| 752 | return "" |
| 753 | } |
| 754 | return path.slice(startDot, end) |
| 755 | }, |
| 756 | |
| 757 | format: function format(pathObject) { |
| 758 | if (pathObject === null || typeof pathObject !== "object") { |