Save file update (incomplete)

src/duskdolphin/save/savedolphin.h

@@ -0,0 +1,68 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "error/error.h"
+#include "save/savefile.h"
+#include <gccore.h>
+
+#define SAVE_DOLPHIN_FILE_NAME_MAX 32
+#define SAVE_DOLPHIN_SECTOR_SIZE 8192
+
+#ifndef SAVE_DOLPHIN_GAME_CODE
+  #define SAVE_DOLPHIN_GAME_CODE "DUSK"
+#endif
+
+#ifndef SAVE_DOLPHIN_CHANNEL
+  #define SAVE_DOLPHIN_CHANNEL CARD_SLOTA
+#endif
+
+typedef struct {
+  card_file cardFile;
+  uint8_t cardBuffer[CARD_WORKAREA] __attribute__((aligned(32)));
+  bool_t mounted;
+} savedolphin_t;
+
+/**
+ * Initializes the save system on GameCube (memory card slot A by default).
+ *
+ * @return An error code if initialization fails.
+ */
+errorret_t saveInitDolphin(void);
+
+/**
+ * Disposes of the save system on GameCube.
+ *
+ * @return An error code if disposal fails.
+ */
+errorret_t saveDisposeDolphin(void);
+
+/**
+ * Loads a save file from the memory card for the given slot.
+ *
+ * @param slot The save slot index.
+ * @param file Output save file data.
+ * @return An error code if the load fails.
+ */
+errorret_t saveLoadDolphin(const uint8_t slot, savefile_t *file);
+
+/**
+ * Writes a save file to the memory card for the given slot.
+ *
+ * @param slot The save slot index.
+ * @param file Save file data to write.
+ * @return An error code if the write fails.
+ */
+errorret_t saveWriteDolphin(const uint8_t slot, const savefile_t *file);
+
+/**
+ * Deletes the save file for the given slot from the memory card.
+ *
+ * @param slot The save slot index.
+ * @return An error code if the delete fails.
+ */
+errorret_t saveDeleteDolphin(const uint8_t slot);