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stream: Implement seek operation support via ioctl, wrapped in generic method.

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Also, implement for unix port.
This commit is contained in:
Paul Sokolovsky
2014-11-17 00:16:14 +02:00
parent f4a6a577ab
commit 838eb1fa2d
6 changed files with 65 additions and 2 deletions
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13
py/obj.h
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@@ -231,8 +231,6 @@ void mp_get_buffer_raise(mp_obj_t obj, mp_buffer_info_t *bufinfo, mp_uint_t flag
// Stream protocol
#define MP_STREAM_ERROR (-1)
#define MP_STREAM_FLUSH (1)
#define MP_STREAM_POLL (2)
typedef struct _mp_stream_p_t {
// On error, functions should return MP_STREAM_ERROR and fill in *errcode (values
// are implementation-dependent, but will be exposed to user, e.g. via exception).
@@ -242,6 +240,17 @@ typedef struct _mp_stream_p_t {
mp_uint_t is_text : 1; // default is bytes, set this for text stream
} mp_stream_p_t;
// Stream ioctl request codes
#define MP_STREAM_FLUSH (1)
#define MP_STREAM_SEEK (2)
#define MP_STREAM_POLL (3)
// Argument structure for MP_STREAM_SEEK
struct mp_stream_seek_t {
mp_off_t offset;
int whence;
};
struct _mp_obj_type_t {
mp_obj_base_t base;
qstr name;