https://github.com/substack/path-browserify/pull/12 — diff between the full and reduced version

path-browserify.index-v8.11.1.diff

0a1,3
> // 'path' module extracted from Node.js v8.11.1 (only the posix part)
> // transplited with Babel
> 
24,27d26
< var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
< 
< var inspect = require('util').inspect;
< 
30,84c29
<     throw new TypeError('Path must be a string. Received ' + inspect(path));
<   }
< }
< 
< // Resolves . and .. elements in a path with directory names
< function normalizeStringWin32(path, allowAboveRoot) {
<   var res = '';
<   var lastSegmentLength = 0;
<   var lastSlash = -1;
<   var dots = 0;
<   var code;
<   for (var i = 0; i <= path.length; ++i) {
<     if (i < path.length) code = path.charCodeAt(i);else if (code === 47 /*/*/ || code === 92 /*\*/) break;else code = 47 /*/*/;
<     if (code === 47 /*/*/ || code === 92 /*\*/) {
<         if (lastSlash === i - 1 || dots === 1) {
<           // NOOP
<         } else if (lastSlash !== i - 1 && dots === 2) {
<           if (res.length < 2 || lastSegmentLength !== 2 || res.charCodeAt(res.length - 1) !== 46 /*.*/ || res.charCodeAt(res.length - 2) !== 46 /*.*/) {
<               if (res.length > 2) {
<                 var lastSlashIndex = res.lastIndexOf('\\');
<                 if (lastSlashIndex !== res.length - 1) {
<                   if (lastSlashIndex === -1) {
<                     res = '';
<                     lastSegmentLength = 0;
<                   } else {
<                     res = res.slice(0, lastSlashIndex);
<                     lastSegmentLength = res.length - 1 - res.lastIndexOf('\\');
<                   }
<                   lastSlash = i;
<                   dots = 0;
<                   continue;
<                 }
<               } else if (res.length === 2 || res.length === 1) {
<                 res = '';
<                 lastSegmentLength = 0;
<                 lastSlash = i;
<                 dots = 0;
<                 continue;
<               }
<             }
<           if (allowAboveRoot) {
<             if (res.length > 0) res += '\\..';else res = '..';
<             lastSegmentLength = 2;
<           }
<         } else {
<           if (res.length > 0) res += '\\' + path.slice(lastSlash + 1, i);else res = path.slice(lastSlash + 1, i);
<           lastSegmentLength = i - lastSlash - 1;
<         }
<         lastSlash = i;
<         dots = 0;
<       } else if (code === 46 /*.*/ && dots !== -1) {
<       ++dots;
<     } else {
<       dots = -1;
<     }
---
>     throw new TypeError('Path must be a string. Received ' + JSON.stringify(path));
86d30
<   return res;
156,1018d99
< var win32 = {
<   // path.resolve([from ...], to)
<   resolve: function resolve() {
<     var resolvedDevice = '';
<     var resolvedTail = '';
<     var resolvedAbsolute = false;
< 
<     for (var i = arguments.length - 1; i >= -1; i--) {
<       var path;
<       if (i >= 0) {
<         path = arguments[i];
<       } else if (!resolvedDevice) {
<         path = process.cwd();
<       } else {
<         // Windows has the concept of drive-specific current working
<         // directories. If we've resolved a drive letter but not yet an
<         // absolute path, get cwd for that drive, or the process cwd if
<         // the drive cwd is not available. We're sure the device is not
<         // a UNC path at this points, because UNC paths are always absolute.
<         path = process.env['=' + resolvedDevice] || process.cwd();
< 
<         // Verify that a cwd was found and that it actually points
<         // to our drive. If not, default to the drive's root.
<         if (path === undefined || path.slice(0, 3).toLowerCase() !== resolvedDevice.toLowerCase() + '\\') {
<           path = resolvedDevice + '\\';
<         }
<       }
< 
<       assertPath(path);
< 
<       // Skip empty entries
<       if (path.length === 0) {
<         continue;
<       }
< 
<       var len = path.length;
<       var rootEnd = 0;
<       var code = path.charCodeAt(0);
<       var device = '';
<       var isAbsolute = false;
< 
<       // Try to match a root
<       if (len > 1) {
<         if (code === 47 /*/*/ || code === 92 /*\*/) {
<             // Possible UNC root
< 
<             // If we started with a separator, we know we at least have an
<             // absolute path of some kind (UNC or otherwise)
<             isAbsolute = true;
< 
<             code = path.charCodeAt(1);
<             if (code === 47 /*/*/ || code === 92 /*\*/) {
<                 // Matched double path separator at beginning
<                 var j = 2;
<                 var last = j;
<                 // Match 1 or more non-path separators
<                 for (; j < len; ++j) {
<                   code = path.charCodeAt(j);
<                   if (code === 47 /*/*/ || code === 92 /*\*/) break;
<                 }
<                 if (j < len && j !== last) {
<                   var firstPart = path.slice(last, j);
<                   // Matched!
<                   last = j;
<                   // Match 1 or more path separators
<                   for (; j < len; ++j) {
<                     code = path.charCodeAt(j);
<                     if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
<                   }
<                   if (j < len && j !== last) {
<                     // Matched!
<                     last = j;
<                     // Match 1 or more non-path separators
<                     for (; j < len; ++j) {
<                       code = path.charCodeAt(j);
<                       if (code === 47 /*/*/ || code === 92 /*\*/) break;
<                     }
<                     if (j === len) {
<                       // We matched a UNC root only
< 
<                       device = '\\\\' + firstPart + '\\' + path.slice(last);
<                       rootEnd = j;
<                     } else if (j !== last) {
<                       // We matched a UNC root with leftovers
< 
<                       device = '\\\\' + firstPart + '\\' + path.slice(last, j);
<                       rootEnd = j;
<                     }
<                   }
<                 }
<               } else {
<               rootEnd = 1;
<             }
<           } else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
<           // Possible device root
< 
<           if (path.charCodeAt(1) === 58 /*:*/) {
<               device = path.slice(0, 2);
<               rootEnd = 2;
<               if (len > 2) {
<                 code = path.charCodeAt(2);
<                 if (code === 47 /*/*/ || code === 92 /*\*/) {
<                     // Treat separator following drive name as an absolute path
<                     // indicator
<                     isAbsolute = true;
<                     rootEnd = 3;
<                   }
<               }
<             }
<         }
<       } else if (code === 47 /*/*/ || code === 92 /*\*/) {
<           // `path` contains just a path separator
<           rootEnd = 1;
<           isAbsolute = true;
<         }
< 
<       if (device.length > 0 && resolvedDevice.length > 0 && device.toLowerCase() !== resolvedDevice.toLowerCase()) {
<         // This path points to another device so it is not applicable
<         continue;
<       }
< 
<       if (resolvedDevice.length === 0 && device.length > 0) {
<         resolvedDevice = device;
<       }
<       if (!resolvedAbsolute) {
<         resolvedTail = path.slice(rootEnd) + '\\' + resolvedTail;
<         resolvedAbsolute = isAbsolute;
<       }
< 
<       if (resolvedDevice.length > 0 && resolvedAbsolute) {
<         break;
<       }
<     }
< 
<     // At this point the path should be resolved to a full absolute path,
<     // but handle relative paths to be safe (might happen when process.cwd()
<     // fails)
< 
<     // Normalize the tail path
<     resolvedTail = normalizeStringWin32(resolvedTail, !resolvedAbsolute);
< 
<     return resolvedDevice + (resolvedAbsolute ? '\\' : '') + resolvedTail || '.';
<   },
< 
<   normalize: function normalize(path) {
<     assertPath(path);
<     var len = path.length;
<     if (len === 0) return '.';
<     var rootEnd = 0;
<     var code = path.charCodeAt(0);
<     var device;
<     var isAbsolute = false;
< 
<     // Try to match a root
<     if (len > 1) {
<       if (code === 47 /*/*/ || code === 92 /*\*/) {
<           // Possible UNC root
< 
<           // If we started with a separator, we know we at least have an absolute
<           // path of some kind (UNC or otherwise)
<           isAbsolute = true;
< 
<           code = path.charCodeAt(1);
<           if (code === 47 /*/*/ || code === 92 /*\*/) {
<               // Matched double path separator at beginning
<               var j = 2;
<               var last = j;
<               // Match 1 or more non-path separators
<               for (; j < len; ++j) {
<                 code = path.charCodeAt(j);
<                 if (code === 47 /*/*/ || code === 92 /*\*/) break;
<               }
<               if (j < len && j !== last) {
<                 var firstPart = path.slice(last, j);
<                 // Matched!
<                 last = j;
<                 // Match 1 or more path separators
<                 for (; j < len; ++j) {
<                   code = path.charCodeAt(j);
<                   if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
<                 }
<                 if (j < len && j !== last) {
<                   // Matched!
<                   last = j;
<                   // Match 1 or more non-path separators
<                   for (; j < len; ++j) {
<                     code = path.charCodeAt(j);
<                     if (code === 47 /*/*/ || code === 92 /*\*/) break;
<                   }
<                   if (j === len) {
<                     // We matched a UNC root only
<                     // Return the normalized version of the UNC root since there
<                     // is nothing left to process
< 
<                     return '\\\\' + firstPart + '\\' + path.slice(last) + '\\';
<                   } else if (j !== last) {
<                     // We matched a UNC root with leftovers
< 
<                     device = '\\\\' + firstPart + '\\' + path.slice(last, j);
<                     rootEnd = j;
<                   }
<                 }
<               }
<             } else {
<             rootEnd = 1;
<           }
<         } else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
<         // Possible device root
< 
<         if (path.charCodeAt(1) === 58 /*:*/) {
<             device = path.slice(0, 2);
<             rootEnd = 2;
<             if (len > 2) {
<               code = path.charCodeAt(2);
<               if (code === 47 /*/*/ || code === 92 /*\*/) {
<                   // Treat separator following drive name as an absolute path
<                   // indicator
<                   isAbsolute = true;
<                   rootEnd = 3;
<                 }
<             }
<           }
<       }
<     } else if (code === 47 /*/*/ || code === 92 /*\*/) {
<         // `path` contains just a path separator, exit early to avoid unnecessary
<         // work
<         return '\\';
<       }
< 
<     code = path.charCodeAt(len - 1);
<     var trailingSeparator = code === 47 /*/*/ || code === 92 /*\*/;
<     var tail;
<     if (rootEnd < len) tail = normalizeStringWin32(path.slice(rootEnd), !isAbsolute);else tail = '';
<     if (tail.length === 0 && !isAbsolute) tail = '.';
<     if (tail.length > 0 && trailingSeparator) tail += '\\';
<     if (device === undefined) {
<       if (isAbsolute) {
<         if (tail.length > 0) return '\\' + tail;else return '\\';
<       } else if (tail.length > 0) {
<         return tail;
<       } else {
<         return '';
<       }
<     } else if (isAbsolute) {
<       if (tail.length > 0) return device + '\\' + tail;else return device + '\\';
<     } else if (tail.length > 0) {
<       return device + tail;
<     } else {
<       return device;
<     }
<   },
< 
<   isAbsolute: function isAbsolute(path) {
<     assertPath(path);
<     var len = path.length;
<     if (len === 0) return false;
<     var code = path.charCodeAt(0);
<     if (code === 47 /*/*/ || code === 92 /*\*/) {
<         return true;
<       } else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
<       // Possible device root
< 
<       if (len > 2 && path.charCodeAt(1) === 58 /*:*/) {
<           code = path.charCodeAt(2);
<           if (code === 47 /*/*/ || code === 92 /*\*/) return true;
<         }
<     }
<     return false;
<   },
< 
<   join: function join() {
<     if (arguments.length === 0) return '.';
< 
<     var joined;
<     var firstPart;
<     for (var i = 0; i < arguments.length; ++i) {
<       var arg = arguments[i];
<       assertPath(arg);
<       if (arg.length > 0) {
<         if (joined === undefined) joined = firstPart = arg;else joined += '\\' + arg;
<       }
<     }
< 
<     if (joined === undefined) return '.';
< 
<     // Make sure that the joined path doesn't start with two slashes, because
<     // normalize() will mistake it for an UNC path then.
<     //
<     // This step is skipped when it is very clear that the user actually
<     // intended to point at an UNC path. This is assumed when the first
<     // non-empty string arguments starts with exactly two slashes followed by
<     // at least one more non-slash character.
<     //
<     // Note that for normalize() to treat a path as an UNC path it needs to
<     // have at least 2 components, so we don't filter for that here.
<     // This means that the user can use join to construct UNC paths from
<     // a server name and a share name; for example:
<     //   path.join('//server', 'share') -> '\\\\server\\share\\')
<     var needsReplace = true;
<     var slashCount = 0;
<     var code = firstPart.charCodeAt(0);
<     if (code === 47 /*/*/ || code === 92 /*\*/) {
<         ++slashCount;
<         var firstLen = firstPart.length;
<         if (firstLen > 1) {
<           code = firstPart.charCodeAt(1);
<           if (code === 47 /*/*/ || code === 92 /*\*/) {
<               ++slashCount;
<               if (firstLen > 2) {
<                 code = firstPart.charCodeAt(2);
<                 if (code === 47 /*/*/ || code === 92 /*\*/) ++slashCount;else {
<                   // We matched a UNC path in the first part
<                   needsReplace = false;
<                 }
<               }
<             }
<         }
<       }
<     if (needsReplace) {
<       // Find any more consecutive slashes we need to replace
<       for (; slashCount < joined.length; ++slashCount) {
<         code = joined.charCodeAt(slashCount);
<         if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
<       }
< 
<       // Replace the slashes if needed
<       if (slashCount >= 2) joined = '\\' + joined.slice(slashCount);
<     }
< 
<     return win32.normalize(joined);
<   },
< 
<   // It will solve the relative path from `from` to `to`, for instance:
<   //  from = 'C:\\orandea\\test\\aaa'
<   //  to = 'C:\\orandea\\impl\\bbb'
<   // The output of the function should be: '..\\..\\impl\\bbb'
<   relative: function relative(from, to) {
<     assertPath(from);
<     assertPath(to);
< 
<     if (from === to) return '';
< 
<     var fromOrig = win32.resolve(from);
<     var toOrig = win32.resolve(to);
< 
<     if (fromOrig === toOrig) return '';
< 
<     from = fromOrig.toLowerCase();
<     to = toOrig.toLowerCase();
< 
<     if (from === to) return '';
< 
<     // Trim any leading backslashes
<     var fromStart = 0;
<     for (; fromStart < from.length; ++fromStart) {
<       if (from.charCodeAt(fromStart) !== 92 /*\*/) break;
<     }
<     // Trim trailing backslashes (applicable to UNC paths only)
<     var fromEnd = from.length;
<     for (; fromEnd - 1 > fromStart; --fromEnd) {
<       if (from.charCodeAt(fromEnd - 1) !== 92 /*\*/) break;
<     }
<     var fromLen = fromEnd - fromStart;
< 
<     // Trim any leading backslashes
<     var toStart = 0;
<     for (; toStart < to.length; ++toStart) {
<       if (to.charCodeAt(toStart) !== 92 /*\*/) break;
<     }
<     // Trim trailing backslashes (applicable to UNC paths only)
<     var toEnd = to.length;
<     for (; toEnd - 1 > toStart; --toEnd) {
<       if (to.charCodeAt(toEnd - 1) !== 92 /*\*/) break;
<     }
<     var toLen = toEnd - toStart;
< 
<     // Compare paths to find the longest common path from root
<     var length = fromLen < toLen ? fromLen : toLen;
<     var lastCommonSep = -1;
<     var i = 0;
<     for (; i <= length; ++i) {
<       if (i === length) {
<         if (toLen > length) {
<           if (to.charCodeAt(toStart + i) === 92 /*\*/) {
<               // We get here if `from` is the exact base path for `to`.
<               // For example: from='C:\\foo\\bar'; to='C:\\foo\\bar\\baz'
<               return toOrig.slice(toStart + i + 1);
<             } else if (i === 2) {
<             // We get here if `from` is the device root.
<             // For example: from='C:\\'; to='C:\\foo'
<             return toOrig.slice(toStart + i);
<           }
<         }
<         if (fromLen > length) {
<           if (from.charCodeAt(fromStart + i) === 92 /*\*/) {
<               // We get here if `to` is the exact base path for `from`.
<               // For example: from='C:\\foo\\bar'; to='C:\\foo'
<               lastCommonSep = i;
<             } else if (i === 2) {
<             // We get here if `to` is the device root.
<             // For example: from='C:\\foo\\bar'; to='C:\\'
<             lastCommonSep = 3;
<           }
<         }
<         break;
<       }
<       var fromCode = from.charCodeAt(fromStart + i);
<       var toCode = to.charCodeAt(toStart + i);
<       if (fromCode !== toCode) break;else if (fromCode === 92 /*\*/) lastCommonSep = i;
<     }
< 
<     // We found a mismatch before the first common path separator was seen, so
<     // return the original `to`.
<     if (i !== length && lastCommonSep === -1) {
<       return toOrig;
<     }
< 
<     var out = '';
<     if (lastCommonSep === -1) lastCommonSep = 0;
<     // Generate the relative path based on the path difference between `to` and
<     // `from`
<     for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) {
<       if (i === fromEnd || from.charCodeAt(i) === 92 /*\*/) {
<           if (out.length === 0) out += '..';else out += '\\..';
<         }
<     }
< 
<     // Lastly, append the rest of the destination (`to`) path that comes after
<     // the common path parts
<     if (out.length > 0) return out + toOrig.slice(toStart + lastCommonSep, toEnd);else {
<       toStart += lastCommonSep;
<       if (toOrig.charCodeAt(toStart) === 92 /*\*/) ++toStart;
<       return toOrig.slice(toStart, toEnd);
<     }
<   },
< 
<   _makeLong: function _makeLong(path) {
<     // Note: this will *probably* throw somewhere.
<     if (typeof path !== 'string') return path;
< 
<     if (path.length === 0) {
<       return '';
<     }
< 
<     var resolvedPath = win32.resolve(path);
< 
<     if (resolvedPath.length >= 3) {
<       var code = resolvedPath.charCodeAt(0);
<       if (code === 92 /*\*/) {
<           // Possible UNC root
< 
<           if (resolvedPath.charCodeAt(1) === 92 /*\*/) {
<               code = resolvedPath.charCodeAt(2);
<               if (code !== 63 /*?*/ && code !== 46 /*.*/) {
<                   // Matched non-long UNC root, convert the path to a long UNC path
<                   return '\\\\?\\UNC\\' + resolvedPath.slice(2);
<                 }
<             }
<         } else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
<         // Possible device root
< 
<         if (resolvedPath.charCodeAt(1) === 58 /*:*/ && resolvedPath.charCodeAt(2) === 92 /*\*/) {
<             // Matched device root, convert the path to a long UNC path
<             return '\\\\?\\' + resolvedPath;
<           }
<       }
<     }
< 
<     return path;
<   },
< 
<   dirname: function dirname(path) {
<     assertPath(path);
<     var len = path.length;
<     if (len === 0) return '.';
<     var rootEnd = -1;
<     var end = -1;
<     var matchedSlash = true;
<     var offset = 0;
<     var code = path.charCodeAt(0);
< 
<     // Try to match a root
<     if (len > 1) {
<       if (code === 47 /*/*/ || code === 92 /*\*/) {
<           // Possible UNC root
< 
<           rootEnd = offset = 1;
< 
<           code = path.charCodeAt(1);
<           if (code === 47 /*/*/ || code === 92 /*\*/) {
<               // Matched double path separator at beginning
<               var j = 2;
<               var last = j;
<               // Match 1 or more non-path separators
<               for (; j < len; ++j) {
<                 code = path.charCodeAt(j);
<                 if (code === 47 /*/*/ || code === 92 /*\*/) break;
<               }
<               if (j < len && j !== last) {
<                 // Matched!
<                 last = j;
<                 // Match 1 or more path separators
<                 for (; j < len; ++j) {
<                   code = path.charCodeAt(j);
<                   if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
<                 }
<                 if (j < len && j !== last) {
<                   // Matched!
<                   last = j;
<                   // Match 1 or more non-path separators
<                   for (; j < len; ++j) {
<                     code = path.charCodeAt(j);
<                     if (code === 47 /*/*/ || code === 92 /*\*/) break;
<                   }
<                   if (j === len) {
<                     // We matched a UNC root only
<                     return path;
<                   }
<                   if (j !== last) {
<                     // We matched a UNC root with leftovers
< 
<                     // Offset by 1 to include the separator after the UNC root to
<                     // treat it as a "normal root" on top of a (UNC) root
<                     rootEnd = offset = j + 1;
<                   }
<                 }
<               }
<             }
<         } else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
<         // Possible device root
< 
<         if (path.charCodeAt(1) === 58 /*:*/) {
<             rootEnd = offset = 2;
<             if (len > 2) {
<               code = path.charCodeAt(2);
<               if (code === 47 /*/*/ || code === 92 /*\*/) rootEnd = offset = 3;
<             }
<           }
<       }
<     } else if (code === 47 /*/*/ || code === 92 /*\*/) {
<         // `path` contains just a path separator, exit early to avoid
<         // unnecessary work
<         return path;
<       }
< 
<     for (var i = len - 1; i >= offset; --i) {
<       code = path.charCodeAt(i);
<       if (code === 47 /*/*/ || code === 92 /*\*/) {
<           if (!matchedSlash) {
<             end = i;
<             break;
<           }
<         } else {
<         // We saw the first non-path separator
<         matchedSlash = false;
<       }
<     }
< 
<     if (end === -1) {
<       if (rootEnd === -1) return '.';else end = rootEnd;
<     }
<     return path.slice(0, end);
<   },
< 
<   basename: function basename(path, ext) {
<     if (ext !== undefined && typeof ext !== 'string') throw new TypeError('"ext" argument must be a string');
<     assertPath(path);
<     var start = 0;
<     var end = -1;
<     var matchedSlash = true;
<     var i;
< 
<     // Check for a drive letter prefix so as not to mistake the following
<     // path separator as an extra separator at the end of the path that can be
<     // disregarded
<     if (path.length >= 2) {
<       var drive = path.charCodeAt(0);
<       if (drive >= 65 /*A*/ && drive <= 90 /*Z*/ || drive >= 97 /*a*/ && drive <= 122 /*z*/) {
<         if (path.charCodeAt(1) === 58 /*:*/) start = 2;
<       }
<     }
< 
<     if (ext !== undefined && ext.length > 0 && ext.length <= path.length) {
<       if (ext.length === path.length && ext === path) return '';
<       var extIdx = ext.length - 1;
<       var firstNonSlashEnd = -1;
<       for (i = path.length - 1; i >= start; --i) {
<         var code = path.charCodeAt(i);
<         if (code === 47 /*/*/ || code === 92 /*\*/) {
<             // If we reached a path separator that was not part of a set of path
<             // separators at the end of the string, stop now
<             if (!matchedSlash) {
<               start = i + 1;
<               break;
<             }
<           } else {
<           if (firstNonSlashEnd === -1) {
<             // We saw the first non-path separator, remember this index in case
<             // we need it if the extension ends up not matching
<             matchedSlash = false;
<             firstNonSlashEnd = i + 1;
<           }
<           if (extIdx >= 0) {
<             // Try to match the explicit extension
<             if (code === ext.charCodeAt(extIdx)) {
<               if (--extIdx === -1) {
<                 // We matched the extension, so mark this as the end of our path
<                 // component
<                 end = i;
<               }
<             } else {
<               // Extension does not match, so our result is the entire path
<               // component
<               extIdx = -1;
<               end = firstNonSlashEnd;
<             }
<           }
<         }
<       }
< 
<       if (start === end) end = firstNonSlashEnd;else if (end === -1) end = path.length;
<       return path.slice(start, end);
<     } else {
<       for (i = path.length - 1; i >= start; --i) {
<         var _code = path.charCodeAt(i);
<         if (_code === 47 /*/*/ || _code === 92 /*\*/) {
<             // If we reached a path separator that was not part of a set of path
<             // separators at the end of the string, stop now
<             if (!matchedSlash) {
<               start = i + 1;
<               break;
<             }
<           } else if (end === -1) {
<           // We saw the first non-path separator, mark this as the end of our
<           // path component
<           matchedSlash = false;
<           end = i + 1;
<         }
<       }
< 
<       if (end === -1) return '';
<       return path.slice(start, end);
<     }
<   },
< 
<   extname: function extname(path) {
<     assertPath(path);
<     var start = 0;
<     var startDot = -1;
<     var startPart = 0;
<     var end = -1;
<     var matchedSlash = true;
<     // Track the state of characters (if any) we see before our first dot and
<     // after any path separator we find
<     var preDotState = 0;
< 
<     // Check for a drive letter prefix so as not to mistake the following
<     // path separator as an extra separator at the end of the path that can be
<     // disregarded
<     if (path.length >= 2) {
<       var code = path.charCodeAt(0);
<       if (path.charCodeAt(1) === 58 /*:*/ && (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/)) {
<         start = startPart = 2;
<       }
<     }
< 
<     for (var i = path.length - 1; i >= start; --i) {
<       var _code2 = path.charCodeAt(i);
<       if (_code2 === 47 /*/*/ || _code2 === 92 /*\*/) {
<           // If we reached a path separator that was not part of a set of path
<           // separators at the end of the string, stop now
<           if (!matchedSlash) {
<             startPart = i + 1;
<             break;
<           }
<           continue;
<         }
<       if (end === -1) {
<         // We saw the first non-path separator, mark this as the end of our
<         // extension
<         matchedSlash = false;
<         end = i + 1;
<       }
<       if (_code2 === 46 /*.*/) {
<           // If this is our first dot, mark it as the start of our extension
<           if (startDot === -1) startDot = i;else if (preDotState !== 1) preDotState = 1;
<         } else if (startDot !== -1) {
<         // We saw a non-dot and non-path separator before our dot, so we should
<         // have a good chance at having a non-empty extension
<         preDotState = -1;
<       }
<     }
< 
<     if (startDot === -1 || end === -1 ||
<     // We saw a non-dot character immediately before the dot
<     preDotState === 0 ||
<     // The (right-most) trimmed path component is exactly '..'
<     preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
<       return '';
<     }
<     return path.slice(startDot, end);
<   },
< 
<   format: function format(pathObject) {
<     if (pathObject === null || (typeof pathObject === 'undefined' ? 'undefined' : _typeof(pathObject)) !== 'object') {
<       throw new TypeError('Parameter "pathObject" must be an object, not ' + (typeof pathObject === 'undefined' ? 'undefined' : _typeof(pathObject)));
<     }
<     return _format('\\', pathObject);
<   },
< 
<   parse: function parse(path) {
<     assertPath(path);
< 
<     var ret = { root: '', dir: '', base: '', ext: '', name: '' };
<     if (path.length === 0) return ret;
< 
<     var len = path.length;
<     var rootEnd = 0;
<     var code = path.charCodeAt(0);
< 
<     // Try to match a root
<     if (len > 1) {
<       if (code === 47 /*/*/ || code === 92 /*\*/) {
<           // Possible UNC root
< 
<           code = path.charCodeAt(1);
<           rootEnd = 1;
<           if (code === 47 /*/*/ || code === 92 /*\*/) {
<               // Matched double path separator at beginning
<               var j = 2;
<               var last = j;
<               // Match 1 or more non-path separators
<               for (; j < len; ++j) {
<                 code = path.charCodeAt(j);
<                 if (code === 47 /*/*/ || code === 92 /*\*/) break;
<               }
<               if (j < len && j !== last) {
<                 // Matched!
<                 last = j;
<                 // Match 1 or more path separators
<                 for (; j < len; ++j) {
<                   code = path.charCodeAt(j);
<                   if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
<                 }
<                 if (j < len && j !== last) {
<                   // Matched!
<                   last = j;
<                   // Match 1 or more non-path separators
<                   for (; j < len; ++j) {
<                     code = path.charCodeAt(j);
<                     if (code === 47 /*/*/ || code === 92 /*\*/) break;
<                   }
<                   if (j === len) {
<                     // We matched a UNC root only
< 
<                     rootEnd = j;
<                   } else if (j !== last) {
<                     // We matched a UNC root with leftovers
< 
<                     rootEnd = j + 1;
<                   }
<                 }
<               }
<             }
<         } else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
<         // Possible device root
< 
<         if (path.charCodeAt(1) === 58 /*:*/) {
<             rootEnd = 2;
<             if (len > 2) {
<               code = path.charCodeAt(2);
<               if (code === 47 /*/*/ || code === 92 /*\*/) {
<                   if (len === 3) {
<                     // `path` contains just a drive root, exit early to avoid
<                     // unnecessary work
<                     ret.root = ret.dir = path;
<                     return ret;
<                   }
<                   rootEnd = 3;
<                 }
<             } else {
<               // `path` contains just a drive root, exit early to avoid
<               // unnecessary work
<               ret.root = ret.dir = path;
<               return ret;
<             }
<           }
<       }
<     } else if (code === 47 /*/*/ || code === 92 /*\*/) {
<         // `path` contains just a path separator, exit early to avoid
<         // unnecessary work
<         ret.root = ret.dir = path;
<         return ret;
<       }
< 
<     if (rootEnd > 0) ret.root = path.slice(0, rootEnd);
< 
<     var startDot = -1;
<     var startPart = rootEnd;
<     var end = -1;
<     var matchedSlash = true;
<     var i = path.length - 1;
< 
<     // Track the state of characters (if any) we see before our first dot and
<     // after any path separator we find
<     var preDotState = 0;
< 
<     // Get non-dir info
<     for (; i >= rootEnd; --i) {
<       code = path.charCodeAt(i);
<       if (code === 47 /*/*/ || code === 92 /*\*/) {
<           // If we reached a path separator that was not part of a set of path
<           // separators at the end of the string, stop now
<           if (!matchedSlash) {
<             startPart = i + 1;
<             break;
<           }
<           continue;
<         }
<       if (end === -1) {
<         // We saw the first non-path separator, mark this as the end of our
<         // extension
<         matchedSlash = false;
<         end = i + 1;
<       }
<       if (code === 46 /*.*/) {
<           // If this is our first dot, mark it as the start of our extension
<           if (startDot === -1) startDot = i;else if (preDotState !== 1) preDotState = 1;
<         } else if (startDot !== -1) {
<         // We saw a non-dot and non-path separator before our dot, so we should
<         // have a good chance at having a non-empty extension
<         preDotState = -1;
<       }
<     }
< 
<     if (startDot === -1 || end === -1 ||
<     // We saw a non-dot character immediately before the dot
<     preDotState === 0 ||
<     // The (right-most) trimmed path component is exactly '..'
<     preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
<       if (end !== -1) {
<         ret.base = ret.name = path.slice(startPart, end);
<       }
<     } else {
<       ret.name = path.slice(startPart, startDot);
<       ret.base = path.slice(startPart, end);
<       ret.ext = path.slice(startDot, end);
<     }
< 
<     // If the directory is the root, use the entire root as the `dir` including
<     // the trailing slash if any (`C:\abc` -> `C:\`). Otherwise, strip out the
<     // trailing slash (`C:\abc\def` -> `C:\abc`).
<     if (startPart > 0 && startPart !== rootEnd) ret.dir = path.slice(0, startPart - 1);else ret.dir = ret.root;
< 
<     return ret;
<   },
< 
<   sep: '\\',
<   delimiter: ';',
<   win32: null,
<   posix: null
< };
< 
1322,1323c403,404
<     if (pathObject === null || (typeof pathObject === 'undefined' ? 'undefined' : _typeof(pathObject)) !== 'object') {
<       throw new TypeError('Parameter "pathObject" must be an object, not ' + (typeof pathObject === 'undefined' ? 'undefined' : _typeof(pathObject)));
---
>     if (pathObject === null || typeof pathObject === 'undefined') {
>       throw new TypeError('Parameter "pathObject" must be an object, not ' + (typeof pathObject));
1410,1413c491
< posix.win32 = win32.win32 = win32;
< posix.posix = win32.posix = posix;
< 
< if (process.platform === 'win32') module.exports = win32;else module.exports = posix;
---
> posix.posix = posix;
1414a493
> module.exports = posix;