first commit

lib/scssphp/Util/Path.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace ScssPhp\ScssPhp\Util;
+
+/**
+ * @internal
+ */
+class Path
+{
+    /**
+     * @param string $path
+     *
+     * @return bool
+     */
+    public static function isAbsolute($path)
+    {
+        if ($path === '') {
+            return false;
+        }
+
+        if ($path[0] === '/') {
+            return true;
+        }
+
+        if (\DIRECTORY_SEPARATOR !== '\\') {
+            return false;
+        }
+
+        if ($path[0] === '\\') {
+            return true;
+        }
+
+        if (\strlen($path) < 3) {
+            return false;
+        }
+
+        if ($path[1] !== ':') {
+            return false;
+        }
+
+        if ($path[2] !== '/' && $path[2] !== '\\') {
+            return false;
+        }
+
+        if (!preg_match('/^[A-Za-z]$/', $path[0])) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * @param string $part1
+     * @param string $part2
+     *
+     * @return string
+     */
+    public static function join($part1, $part2)
+    {
+        if ($part1 === '' || self::isAbsolute($part2)) {
+            return $part2;
+        }
+
+        if ($part2 === '') {
+            return $part1;
+        }
+
+        $last = $part1[\strlen($part1) - 1];
+        $separator = \DIRECTORY_SEPARATOR;
+
+        if ($last === '/' || $last === \DIRECTORY_SEPARATOR) {
+            $separator = '';
+        }
+
+        return $part1 . $separator . $part2;
+    }
+}