Init repo with basic BG framebuffer renderer

1 files changed, 36 insertions, 0 deletions

diff --git a/src/filesystem.h b/src/filesystem.h
new file mode 100644
index 0000000..d50e5e7
--- /dev/null
+++ b/src/filesystem.h
@@ -0,0 +1,36 @@
+#ifndef FILESYSTEM_H
+#define FILESYSTEM_H
+
+#include "common.h"
+
+typedef enum {
+    FS_OPEN_READ   = (1 << 0),
+    FS_OPEN_WRITE  = (1 << 1),
+    FS_OPEN_APPEND = (1 << 2),
+} OpenMode;
+
+typedef struct File {
+    // File index offset.
+    u8 index;
+    // The offset within the file. Must always be valid, and so the File struct
+    // shouldn't be manaully modified unless we are sure we know what we are
+    // doing.
+    u16 offset;
+    // The mode of this file (read/write/append).
+    OpenMode mode;
+} File;
+
+typedef enum {
+    FS_SEEK_SET,
+    FS_SEEK_CUR,
+    FS_SEEK_END,
+} SeekMode;
+
+void fs_init(void);
+File fs_open_file(char *name, OpenMode mode);
+u16 fs_file_size(File *file);
+int fs_seek(File *file, int offset, SeekMode mode);
+u16 fs_write(u8 *src, u16 n_bytes, File *file);
+u16 fs_read(u8 *dst, u16 n_bytes, File *file);
+
+#endif // FILESYSTEM_H