first commit

vendor/masterminds/html5/src/HTML5/Parser/CharacterReference.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace Masterminds\HTML5\Parser;
+
+use Masterminds\HTML5\Entities;
+
+/**
+ * Manage entity references.
+ *
+ * This is a simple resolver for HTML5 character reference entitites. See Entities for the list of supported entities.
+ */
+class CharacterReference
+{
+    protected static $numeric_mask = array(
+        0x0,
+        0x2FFFF,
+        0,
+        0xFFFF,
+    );
+
+    /**
+     * Given a name (e.g. 'amp'), lookup the UTF-8 character ('&').
+     *
+     * @param string $name The name to look up.
+     *
+     * @return string The character sequence. In UTF-8 this may be more than one byte.
+     */
+    public static function lookupName($name)
+    {
+        // Do we really want to return NULL here? or FFFD
+        return isset(Entities::$byName[$name]) ? Entities::$byName[$name] : null;
+    }
+
+    /**
+     * Given a decimal number, return the UTF-8 character.
+     *
+     * @param $int
+     *
+     * @return false|string|string[]|null
+     */
+    public static function lookupDecimal($int)
+    {
+        $entity = '&#' . $int . ';';
+
+        // UNTESTED: This may fail on some planes. Couldn't find full documentation
+        // on the value of the mask array.
+        return mb_decode_numericentity($entity, static::$numeric_mask, 'utf-8');
+    }
+
+    /**
+     * Given a hexidecimal number, return the UTF-8 character.
+     *
+     * @param $hexdec
+     *
+     * @return false|string|string[]|null
+     */
+    public static function lookupHex($hexdec)
+    {
+        return static::lookupDecimal(hexdec($hexdec));
+    }
+}