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pma/vendor/spomky-labs/cbor-php/src/StringStream.php

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+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018-2020 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace CBOR;
+
+use InvalidArgumentException;
+use RuntimeException;
+
+final class StringStream implements Stream
+{
+    /**
+     * @var resource
+     */
+    private $resource;
+
+    public function __construct(string $data)
+    {
+        $resource = fopen('php://memory', 'rb+');
+        if (false === $resource) {
+            throw new RuntimeException('Unable to open the memory');
+        }
+        $result = fwrite($resource, $data);
+        if (false === $result) {
+            throw new RuntimeException('Unable to write the memory');
+        }
+        $result = rewind($resource);
+        if (false === $result) {
+            throw new RuntimeException('Unable to rewind the memory');
+        }
+        $this->resource = $resource;
+    }
+
+    public function read(int $length): string
+    {
+        if (0 === $length) {
+            return '';
+        }
+        $data = fread($this->resource, $length);
+        if (false === $data) {
+            throw new RuntimeException('Unable to read the memory');
+        }
+        if (mb_strlen($data, '8bit') !== $length) {
+            throw new InvalidArgumentException(sprintf('Out of range. Expected: %d, read: %d.', $length, mb_strlen($data, '8bit')));
+        }
+
+        return $data;
+    }
+}