libcamera: file: Add read/write support

Add basic support to read and write data from/to a file, along with
retrieving and setting the current read/write position.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/libcamera/internal/file.h b/include/libcamera/internal/file.h
index e3e72132..9b6d011f 100644
--- a/include/libcamera/internal/file.h
+++ b/include/libcamera/internal/file.h
@@ -49,6 +49,12 @@ public:
 	int error() const { return error_; }
 	ssize_t size() const;
 
+	off_t pos() const;
+	off_t seek(off_t pos);
+
+	ssize_t read(const Span<uint8_t> &data);
+	ssize_t write(const Span<const uint8_t> &data);
+
 	Span<uint8_t> map(off_t offset = 0, ssize_t size = -1,
 			  MapFlag flags = MapNoOption);
 	bool unmap(uint8_t *addr);