1 files changed, 112 insertions, 0 deletions
diff --git a/vendor/nelexa/zip/src/PhpZip/Extra/Fields/ApkAlignmentExtraField.php b/vendor/nelexa/zip/src/PhpZip/Extra/Fields/ApkAlignmentExtraField.php
new file mode 100644
index 0000000..0280c44
--- /dev/null
+++ b/vendor/nelexa/zip/src/PhpZip/Extra/Fields/ApkAlignmentExtraField.php
@@ -0,0 +1,112 @@
+<?php
+
+namespace PhpZip\Extra\Fields;
+
+use PhpZip\Exception\InvalidArgumentException;
+use PhpZip\Extra\ExtraField;
+
+/**
+ * Apk Alignment Extra Field
+ *
+ * @author Ne-Lexa alexey@nelexa.ru
+ * @license MIT
+ */
+class ApkAlignmentExtraField implements ExtraField
+{
+    /**
+     * Minimum size (in bytes) of the extensible data block/field used
+     * for alignment of uncompressed entries.
+     */
+    const ALIGNMENT_ZIP_EXTRA_MIN_SIZE_BYTES = 6;
+
+    const ANDROID_COMMON_PAGE_ALIGNMENT_BYTES = 4096;
+
+    /**
+     * @var int
+     */
+    private $multiple;
+    /**
+     * @var int
+     */
+    private $padding;
+
+    /**
+     * Returns the Header ID (type) of this Extra Field.
+     * The Header ID is an unsigned short integer (two bytes)
+     * which must be constant during the life cycle of this object.
+     *
+     * @return int
+     */
+    public static function getHeaderId()
+    {
+        return 0xD935;
+    }
+
+    /**
+     * Serializes a Data Block.
+     * @return string
+     */
+    public function serialize()
+    {
+        if ($this->padding > 0) {
+            $args = array_merge(
+                ['vc*', $this->multiple],
+                array_fill(2, $this->padding, 0)
+            );
+            return call_user_func_array('pack', $args);
+        }
+        return pack('v', $this->multiple);
+    }
+
+    /**
+     * Initializes this Extra Field by deserializing a Data Block.
+     * @param string $data
+     * @throws InvalidArgumentException
+     */
+    public function deserialize($data)
+    {
+        $length = strlen($data);
+        if ($length < 2) {
+            // This is APK alignment field.
+            // FORMAT:
+            //  * uint16 alignment multiple (in bytes)
+            //  * remaining bytes -- padding to achieve alignment of data which starts after
+            //    the extra field
+            throw new InvalidArgumentException("Minimum 6 bytes of the extensible data block/field used for alignment of uncompressed entries.");
+        }
+        $this->multiple = unpack('v', $data)[1];
+        $this->padding = $length - 2;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getMultiple()
+    {
+        return $this->multiple;
+    }
+
+    /**
+     * @return int
+     */
+    public function getPadding()
+    {
+        return $this->padding;
+    }
+
+    /**
+     * @param int $multiple
+     */
+    public function setMultiple($multiple)
+    {
+        $this->multiple = $multiple;
+    }
+
+    /**
+     * @param int $padding
+     */
+    public function setPadding($padding)
+    {
+        $this->padding = $padding;
+    }
+}