libio: remove buffer_offset from istream_t

Instead, make the buffer const, let the user adjust the pointer and
size. The offset can then be inferred in precache.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 1 insertions, 2 deletions

diff --git a/include/io/istream.h b/include/io/istream.h
index 7adb204..9a8257f 100644
--- a/include/io/istream.h
+++ b/include/io/istream.h
@@ -21,10 +21,9 @@ typedef struct istream_t {
 	sqfs_object_t base;
 
 	size_t buffer_used;
-	size_t buffer_offset;
 	bool eof;
 
-	sqfs_u8 *buffer;
+	const sqfs_u8 *buffer;
 
 	int (*precache)(struct istream_t *strm);