pf2: add volume init, context register/unregister

libraries/libvapours/include/vapours/prfile2/prfile2_fat.hpp

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <vapours/prfile2/prfile2_common.hpp>
+
+namespace ams::prfile2 {
+
+    struct FatHint {
+        u32 chain_index;
+        u32 cluster;
+    };
+
+    using LastAccess = FatHint;
+
+    struct LastCluster {
+        u32 num_last_cluster;
+        u32 max_chain_index;
+    };
+
+    struct ClusterLinkForVolume {
+        u16 flag;
+        u16 interval;
+        u32 *buffer;
+        u32 link_max;
+    };
+
+    using ClusterBuf = u32;
+
+    struct ClusterLink {
+        u64 position;
+        ClusterBuf *buffer;
+        u16 interval;
+        u16 interval_offset;
+        u32 save_index;
+        u32 max_count;
+    };
+
+    struct Volume;
+
+    struct FatFileDescriptor {
+        u32 start_cluster;
+        u32 *p_start_cluster;
+        LastCluster last_cluster;
+        LastAccess last_access;
+        ClusterLink cluster_link;
+        FatHint *hint;
+        Volume *volume;
+        /* ... */
+    };
+
+}