'use strict';

var isWindows = process.platform === 'win32';

// Regex to split a windows path into three parts: [*, device, slash, // tail] windows-only var splitDeviceRe =

/^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/]+[^\\\/]+)?([\\\/])?([\s\S]*?)$/;

// Regex to split the tail part of the above into [*, dir, basename, ext] var splitTailRe =

/^([\s\S]*?)((?:\.{1,2}|[^\\\/]+?|)(\.[^.\/\\]*|))(?:[\\\/]*)$/;

var win32 = {};

// Function to split a filename into [root, dir, basename, ext] function win32SplitPath(filename) {

// Separate device+slash from tail
var result = splitDeviceRe.exec(filename),
    device = (result[1] || '') + (result[2] || ''),
    tail = result[3] || '';
// Split the tail into dir, basename and extension
var result2 = splitTailRe.exec(tail),
    dir = result2[1],
    basename = result2[2],
    ext = result2[3];
return [device, dir, basename, ext];

}

win32.parse = function(pathString) {

if (typeof pathString !== 'string') {
  throw new TypeError(
      "Parameter 'pathString' must be a string, not " + typeof pathString
  );
}
var allParts = win32SplitPath(pathString);
if (!allParts || allParts.length !== 4) {
  throw new TypeError("Invalid path '" + pathString + "'");
}
return {
  root: allParts[0],
  dir: allParts[0] + allParts[1].slice(0, -1),
  base: allParts[2],
  ext: allParts[3],
  name: allParts[2].slice(0, allParts[2].length - allParts[3].length)
};

};

// Split a filename into [root, dir, basename, ext], unix version // 'root' is just a slash, or nothing. var splitPathRe =

/^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;

var posix = {};

function posixSplitPath(filename) {

return splitPathRe.exec(filename).slice(1);

}

posix.parse = function(pathString) {

if (typeof pathString !== 'string') {
  throw new TypeError(
      "Parameter 'pathString' must be a string, not " + typeof pathString
  );
}
var allParts = posixSplitPath(pathString);
if (!allParts || allParts.length !== 4) {
  throw new TypeError("Invalid path '" + pathString + "'");
}
allParts[1] = allParts[1] || '';
allParts[2] = allParts[2] || '';
allParts[3] = allParts[3] || '';

return {
  root: allParts[0],
  dir: allParts[0] + allParts[1].slice(0, -1),
  base: allParts[2],
  ext: allParts[3],
  name: allParts[2].slice(0, allParts[2].length - allParts[3].length)
};

};

if (isWindows)

module.exports = win32.parse;

else /* posix */

module.exports = posix.parse;

module.exports.posix = posix.parse; module.exports.win32 = win32.parse;