fusee_cpp: rename source dir to fusee

fusee/program/source/fs/fusee_fs_file_storage.cpp

@@ -0,0 +1,73 @@
+/*
+ * 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/>.
+ */
+#include <exosphere.hpp>
+#include "fusee_fs_storage.hpp"
+
+namespace ams::fs {
+
+    Result FileHandleStorage::UpdateSize() {
+        R_SUCCEED_IF(m_size != InvalidSize);
+        return GetFileSize(std::addressof(m_size), m_handle);
+    }
+
+    Result FileHandleStorage::Read(s64 offset, void *buffer, size_t size) {
+        /* Immediately succeed if there's nothing to read. */
+        R_SUCCEED_IF(size == 0);
+
+        /* Validate buffer. */
+        R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument());
+
+        /* Ensure our size is valid. */
+        R_TRY(this->UpdateSize());
+
+        /* Ensure our access is valid. */
+        R_UNLESS(IStorage::CheckAccessRange(offset, size, m_size), fs::ResultOutOfRange());
+
+        return ReadFile(m_handle, offset, buffer, size, fs::ReadOption());
+    }
+
+    Result FileHandleStorage::Write(s64 offset, const void *buffer, size_t size) {
+        /* Immediately succeed if there's nothing to write. */
+        R_SUCCEED_IF(size == 0);
+
+        /* Validate buffer. */
+        R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument());
+
+        /* Ensure our size is valid. */
+        R_TRY(this->UpdateSize());
+
+        /* Ensure our access is valid. */
+        R_UNLESS(IStorage::CheckAccessRange(offset, size, m_size), fs::ResultOutOfRange());
+
+        return WriteFile(m_handle, offset, buffer, size, fs::WriteOption());
+    }
+
+    Result FileHandleStorage::Flush() {
+        return FlushFile(m_handle);
+    }
+
+    Result FileHandleStorage::GetSize(s64 *out_size) {
+        R_TRY(this->UpdateSize());
+        *out_size = m_size;
+        return ResultSuccess();
+    }
+
+    Result FileHandleStorage::SetSize(s64 size) {
+        m_size = InvalidSize;
+        return SetFileSize(m_handle, size);
+    }
+
+}