Core: Add a passthrough backend for the filesystem, exposed as SDMC.

src/core/file_sys/archive_sdmc.cpp

@@ -0,0 +1,96 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#include <sys/stat.h>
+
+#include "common/common_types.h"
+#include "common/file_util.h"
+
+#include "core/file_sys/archive_sdmc.h"
+#include "core/file_sys/file_sdmc.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+Archive_SDMC::Archive_SDMC(const std::string& mount_point) {
+    this->mount_point = mount_point;
+    DEBUG_LOG(FILESYS, "Directory %s set as SDMC.", mount_point.c_str());
+}
+
+Archive_SDMC::~Archive_SDMC() {
+}
+
+bool Archive_SDMC::Initialize() {
+    if (!FileUtil::IsDirectory(mount_point)) {
+        WARN_LOG(FILESYS, "Directory %s not found, disabling SDMC.", mount_point.c_str());
+        return false;
+    }
+
+    return true;
+}
+
+/**
+ * Open a file specified by its path, using the specified mode
+ * @param path Path relative to the archive
+ * @param mode Mode to open the file with
+ * @return Opened file, or nullptr
+ */
+std::unique_ptr<File> Archive_SDMC::OpenFile(const std::string& path, const Mode mode) const {
+    DEBUG_LOG(FILESYS, "called path=%s mode=%d", path.c_str(), mode);
+    File_SDMC* file = new File_SDMC(this, path, mode);
+    return std::unique_ptr<File>(file);
+}
+
+/**
+ * Read data from the archive
+ * @param offset Offset in bytes to start reading archive from
+ * @param length Length in bytes to read data from archive
+ * @param buffer Buffer to read data into
+ * @return Number of bytes read
+ */
+size_t Archive_SDMC::Read(const u64 offset, const u32 length, u8* buffer) const {
+    ERROR_LOG(FILESYS, "(UNIMPLEMENTED)");
+    return -1;
+}
+
+/**
+ * Write data to the archive
+ * @param offset Offset in bytes to start writing data to
+ * @param length Length in bytes of data to write to archive
+ * @param buffer Buffer to write data from
+ * @param flush  The flush parameters (0 == do not flush)
+ * @return Number of bytes written
+ */
+size_t Archive_SDMC::Write(const u64 offset, const u32 length, const u32 flush, u8* buffer) {
+    ERROR_LOG(FILESYS, "(UNIMPLEMENTED)");
+    return -1;
+}
+
+/**
+ * Get the size of the archive in bytes
+ * @return Size of the archive in bytes
+ */
+size_t Archive_SDMC::GetSize() const {
+    ERROR_LOG(FILESYS, "(UNIMPLEMENTED)");
+    return 0;
+}
+
+/**
+ * Set the size of the archive in bytes
+ */
+void Archive_SDMC::SetSize(const u64 size) {
+    ERROR_LOG(FILESYS, "(UNIMPLEMENTED)");
+}
+
+/**
+ * Getter for the path used for this Archive
+ * @return Mount point of that passthrough archive
+ */
+std::string Archive_SDMC::GetMountPoint() const {
+    return mount_point;
+}
+
+} // namespace FileSys