From 85028aadab6763a0d899e71f54643840d9f8546d Mon Sep 17 00:00:00 2001 From: iabdalkader Date: Mon, 20 Nov 2023 14:24:04 +0100 Subject: [PATCH] py/stream: Add mp_stream_seek() helper function. Signed-off-by: iabdalkader --- py/stream.c | 12 ++++++++++++ py/stream.h | 1 + 2 files changed, 13 insertions(+) diff --git a/py/stream.c b/py/stream.c index aa905ca8cc..e008fb999e 100644 --- a/py/stream.c +++ b/py/stream.c @@ -82,6 +82,18 @@ mp_uint_t mp_stream_rw(mp_obj_t stream, void *buf_, mp_uint_t size, int *errcode return done; } +mp_uint_t mp_stream_seek(mp_obj_t stream, mp_off_t offset, int whence, int *errcode) { + struct mp_stream_seek_t seek_s; + seek_s.offset = offset; + seek_s.whence = whence; + const mp_stream_p_t *stream_p = mp_get_stream(stream); + mp_uint_t res = stream_p->ioctl(MP_OBJ_FROM_PTR(stream), MP_STREAM_SEEK, (mp_uint_t)(uintptr_t)&seek_s, errcode); + if (res == MP_STREAM_ERROR) { + return -1; + } + return seek_s.offset; +} + const mp_stream_p_t *mp_get_stream_raise(mp_obj_t self_in, int flags) { const mp_obj_type_t *type = mp_obj_get_type(self_in); if (MP_OBJ_TYPE_HAS_SLOT(type, protocol)) { diff --git a/py/stream.h b/py/stream.h index e6e6f283df..7c2e87a87c 100644 --- a/py/stream.h +++ b/py/stream.h @@ -115,6 +115,7 @@ mp_obj_t mp_stream_write(mp_obj_t self_in, const void *buf, size_t len, byte fla mp_uint_t mp_stream_rw(mp_obj_t stream, void *buf, mp_uint_t size, int *errcode, byte flags); #define mp_stream_write_exactly(stream, buf, size, err) mp_stream_rw(stream, (byte *)buf, size, err, MP_STREAM_RW_WRITE) #define mp_stream_read_exactly(stream, buf, size, err) mp_stream_rw(stream, buf, size, err, MP_STREAM_RW_READ) +mp_uint_t mp_stream_seek(mp_obj_t stream, mp_off_t offset, int whence, int *errcode); void mp_stream_write_adaptor(void *self, const char *buf, size_t len);