add hdd dump support, cleanup dump code into a single generic file.

sphaira/include/dumper.hpp

@@ -0,0 +1,45 @@
+#pragma once
+
+#include "fs.hpp"
+#include <switch.h>
+#include <vector>
+#include <memory>
+#include <functional>
+
+namespace sphaira::dump {
+
+enum DumpLocationType {
+    // dump using native fs.
+    DumpLocationType_SdCard,
+    // dump to usb using tinfoil protocol.
+    DumpLocationType_UsbS2S,
+    // speed test, only reads the data, doesn't write anything.
+    DumpLocationType_DevNull,
+    // dump to stdio, ideal for custom mount points using devoptab, such as hdd.
+    DumpLocationType_Stdio,
+    // dump to custom locations found in locations.ini.
+    DumpLocationType_Network,
+};
+
+enum DumpLocationFlag {
+    DumpLocationFlag_SdCard = 1 << DumpLocationType_SdCard,
+    DumpLocationFlag_UsbS2S = 1 << DumpLocationType_UsbS2S,
+    DumpLocationFlag_DevNull = 1 << DumpLocationType_DevNull,
+    DumpLocationFlag_Stdio = 1 << DumpLocationType_Stdio,
+    DumpLocationFlag_Network = 1 << DumpLocationType_Network,
+    DumpLocationFlag_All = DumpLocationFlag_SdCard | DumpLocationFlag_UsbS2S | DumpLocationFlag_DevNull | DumpLocationFlag_Stdio | DumpLocationFlag_Network,
+};
+
+struct BaseSource {
+    virtual ~BaseSource() = default;
+    virtual Result Read(const std::string& path, void* buf, s64 off, s64 size, u64* bytes_read) = 0;
+    virtual auto GetName(const std::string& path) const -> std::string = 0;
+    virtual auto GetSize(const std::string& path) const -> s64 = 0;
+};
+
+// called after dump has finished.
+using OnExit = std::function<void(Result rc)>;
+
+void Dump(std::shared_ptr<BaseSource> source, const std::vector<fs::FsPath>& paths, OnExit on_exit = [](Result){}, u32 location_flags = DumpLocationFlag_All);
+
+} // namespace sphaira::dump