From 4eed412140b37b3d967ab712f6d4feee36f6eb87 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Sun, 16 May 2021 00:53:30 +0300
Subject: File: add get_size/query_id

---
 include/winapi/file.hpp | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

(limited to 'include')

diff --git a/include/winapi/file.hpp b/include/winapi/file.hpp
index b9688e9..78187d9 100644
--- a/include/winapi/file.hpp
+++ b/include/winapi/file.hpp
@@ -8,15 +8,34 @@
 #include "handle.hpp"
 #include "path.hpp"
 
+#include <boost/functional/hash.hpp>
+
+#include <windows.h>
+
+#include <cstddef>
+#include <functional>
 #include <string>
 #include <utility>
 
 namespace winapi {
 
+bool operator==(const FILE_ID_128& a, const FILE_ID_128& b);
+
 class File : private Handle {
 public:
+    struct ID {
+        const FILE_ID_INFO impl;
+
+        bool operator==(const ID& other) const {
+            return impl.VolumeSerialNumber == other.impl.VolumeSerialNumber &&
+                   impl.FileId == other.impl.FileId;
+        }
+    };
+
     static Handle open_r(const std::string&);
     static Handle open_r(const CanonicalPath&);
+    static Handle open_read_attributes(const std::string&);
+    static Handle open_read_attributes(const CanonicalPath&);
     static Handle open_w(const std::string&);
     static Handle open_w(const CanonicalPath&);
 
@@ -29,6 +48,24 @@ public:
 
     using Handle::read;
     using Handle::write;
+
+    std::size_t get_size() const;
+
+    ID query_id() const;
 };
 
 } // namespace winapi
+
+namespace std {
+
+template <>
+struct hash<winapi::File::ID> {
+    std::size_t operator()(const winapi::File::ID& id) const {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, id.impl.VolumeSerialNumber);
+        boost::hash_combine(seed, id.impl.FileId.Identifier);
+        return seed;
+    }
+};
+
+} // namespace std
-- 
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