1 files changed, 68 insertions, 0 deletions
diff --git a/library/patchwork/utf8/class/Patchwork/Utf8/BestFit.php b/library/patchwork/utf8/class/Patchwork/Utf8/BestFit.php
new file mode 100644
index 0000000000..72b0d00dd3
--- /dev/null
+++ b/library/patchwork/utf8/class/Patchwork/Utf8/BestFit.php
@@ -0,0 +1,68 @@
+<?php // vi: set fenc=utf-8 ts=4 sw=4 et:
+/*
+ * Copyright (C) 2013 Nicolas Grekas - p@tchwork.com
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the (at your option):
+ * Apache License v2.0 (http://apache.org/licenses/LICENSE-2.0.txt), or
+ * GNU General Public License v2.0 (http://gnu.org/licenses/gpl-2.0.txt).
+ */
+
+namespace Patchwork\Utf8;
+
+/**
+ * UTF-8 to Code Page conversion using best fit mappings
+ * See http://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WindowsBestFit/
+ */
+class BestFit
+{
+    static function fit($cp, $s, $placeholder = '?')
+    {
+        if (! $len = strlen($s)) return 0 === $len ? '' : false;
+
+        static $map = array();
+        static $ulen_mask = array("\xC0" => 2, "\xD0" => 2, "\xE0" => 3, "\xF0" => 4);
+
+        $s .= '';
+        $cp = (string) (int) $cp;
+        $result = '9' === $cp[0] ? $s . $s : $s;
+
+        if ('932' === $cp && 2 === func_num_args()) $placeholder = "\x81\x45"; // Katakana Middle Dot in CP932
+
+        if (!isset($map[$cp]))
+        {
+            $i = static::getData('to.bestfit' . $cp);
+            if (false === $i) return false;
+            $map[$cp] = $i;
+        }
+
+        $i = $j = 0;
+        $cp = $map[$cp];
+
+        while ($i < $len)
+        {
+            if ($s[$i] < "\x80") $uchr = $s[$i++];
+            else
+            {
+                $ulen = $ulen_mask[$s[$i] & "\xF0"];
+                $uchr = substr($s, $i, $ulen);
+                $i += $ulen;
+            }
+
+            if (isset($cp[$uchr])) $uchr = $cp[$uchr];
+            else $uchr = $placeholder;
+
+            isset($uchr[0]) && $result[$j++] = $uchr[0];
+            isset($uchr[1]) && $result[$j++] = $uchr[1];
+        }
+
+        return substr($result, 0, $j);
+    }
+
+    protected static function getData($file)
+    {
+        $file = __DIR__ . '/data/' . $file . '.ser';
+        if (file_exists($file)) return unserialize(file_get_contents($file));
+        else return false;
+    }
+}