allow vendord

vendor/maennchen/zipstream-php/src/PackField.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ZipStream;
+
+use RuntimeException;
+
+/**
+ * @internal
+ * TODO: Make class readonly when requiring PHP 8.2 exclusively
+ */
+class PackField
+{
+    public const MAX_V = 0xFFFFFFFF;
+
+    public const MAX_v = 0xFFFF;
+
+    public function __construct(
+        public readonly string $format,
+        public readonly int|string $value
+    ) {}
+
+    /**
+     * Create a format string and argument list for pack(), then call
+     * pack() and return the result.
+     */
+    public static function pack(self ...$fields): string
+    {
+        $fmt = array_reduce($fields, function (string $acc, self $field) {
+            return $acc . $field->format;
+        }, '');
+
+        $args = array_map(function (self $field) {
+            switch ($field->format) {
+                case 'V':
+                    if ($field->value > self::MAX_V) {
+                        throw new RuntimeException(print_r($field->value, true) . ' is larger than 32 bits');
+                    }
+                    break;
+                case 'v':
+                    if ($field->value > self::MAX_v) {
+                        throw new RuntimeException(print_r($field->value, true) . ' is larger than 16 bits');
+                    }
+                    break;
+                case 'P': break;
+                default:
+                    break;
+            }
+
+            return $field->value;
+        }, $fields);
+
+        return pack($fmt, ...$args);
+    }
+}