138 lines
5.8 KiB
C
138 lines
5.8 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013, 2014 Damien P. George
|
|
* Copyright (c) 2014-2016 Paul Sokolovsky
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#ifndef MICROPY_INCLUDED_PY_STREAM_H
|
|
#define MICROPY_INCLUDED_PY_STREAM_H
|
|
|
|
#include "py/obj.h"
|
|
#include "py/mperrno.h"
|
|
|
|
#define MP_STREAM_ERROR ((mp_uint_t)-1)
|
|
|
|
// Stream ioctl request codes
|
|
#define MP_STREAM_FLUSH (1)
|
|
#define MP_STREAM_SEEK (2)
|
|
#define MP_STREAM_POLL (3)
|
|
#define MP_STREAM_CLOSE (4)
|
|
#define MP_STREAM_TIMEOUT (5) // Get/set timeout (single op)
|
|
#define MP_STREAM_GET_OPTS (6) // Get stream options
|
|
#define MP_STREAM_SET_OPTS (7) // Set stream options
|
|
#define MP_STREAM_GET_DATA_OPTS (8) // Get data/message options
|
|
#define MP_STREAM_SET_DATA_OPTS (9) // Set data/message options
|
|
#define MP_STREAM_GET_FILENO (10) // Get fileno of underlying file
|
|
#define MP_STREAM_GET_BUFFER_SIZE (11) // Get preferred buffer size for file
|
|
|
|
// These poll ioctl values are compatible with Linux
|
|
#define MP_STREAM_POLL_RD (0x0001)
|
|
#define MP_STREAM_POLL_WR (0x0004)
|
|
#define MP_STREAM_POLL_ERR (0x0008)
|
|
#define MP_STREAM_POLL_HUP (0x0010)
|
|
#define MP_STREAM_POLL_NVAL (0x0020)
|
|
|
|
// Argument structure for MP_STREAM_SEEK
|
|
struct mp_stream_seek_t {
|
|
// If whence == MP_SEEK_SET, offset should be treated as unsigned.
|
|
// This allows dealing with full-width stream sizes (16, 32, 64,
|
|
// etc. bits). For other seek types, should be treated as signed.
|
|
mp_off_t offset;
|
|
int whence;
|
|
};
|
|
|
|
// seek ioctl "whence" values
|
|
#define MP_SEEK_SET (0)
|
|
#define MP_SEEK_CUR (1)
|
|
#define MP_SEEK_END (2)
|
|
|
|
// Stream protocol
|
|
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).
|
|
mp_uint_t (*read)(mp_obj_t obj, void *buf, mp_uint_t size, int *errcode);
|
|
mp_uint_t (*write)(mp_obj_t obj, const void *buf, mp_uint_t size, int *errcode);
|
|
mp_uint_t (*ioctl)(mp_obj_t obj, mp_uint_t request, uintptr_t arg, int *errcode);
|
|
mp_uint_t is_text : 1; // default is bytes, set this for text stream
|
|
} mp_stream_p_t;
|
|
|
|
MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_read_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_read1_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_readinto_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_unbuffered_readline_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_1(mp_stream_unbuffered_readlines_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_write_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_2(mp_stream_write1_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_1(mp_stream_close_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream___exit___obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_seek_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_1(mp_stream_tell_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_1(mp_stream_flush_obj);
|
|
MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_ioctl_obj);
|
|
|
|
// these are for mp_get_stream_raise and can be or'd together
|
|
#define MP_STREAM_OP_READ (1)
|
|
#define MP_STREAM_OP_WRITE (2)
|
|
#define MP_STREAM_OP_IOCTL (4)
|
|
|
|
// Object is assumed to have a non-NULL stream protocol with valid r/w/ioctl methods
|
|
static inline const mp_stream_p_t *mp_get_stream(mp_const_obj_t self) {
|
|
return (const mp_stream_p_t *)MP_OBJ_TYPE_GET_SLOT(((const mp_obj_base_t *)MP_OBJ_TO_PTR(self))->type, protocol);
|
|
}
|
|
|
|
const mp_stream_p_t *mp_get_stream_raise(mp_obj_t self_in, int flags);
|
|
mp_obj_t mp_stream_close(mp_obj_t stream);
|
|
|
|
// Iterator which uses mp_stream_unbuffered_readline_obj
|
|
mp_obj_t mp_stream_unbuffered_iter(mp_obj_t self);
|
|
|
|
mp_obj_t mp_stream_write(mp_obj_t self_in, const void *buf, size_t len, byte flags);
|
|
|
|
// C-level helper functions
|
|
#define MP_STREAM_RW_READ 0
|
|
#define MP_STREAM_RW_WRITE 2
|
|
#define MP_STREAM_RW_ONCE 1
|
|
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)
|
|
|
|
void mp_stream_write_adaptor(void *self, const char *buf, size_t len);
|
|
|
|
#if MICROPY_STREAMS_POSIX_API
|
|
#include <sys/types.h>
|
|
// Functions with POSIX-compatible signatures
|
|
// "stream" is assumed to be a pointer to a concrete object with the stream protocol
|
|
ssize_t mp_stream_posix_write(void *stream, const void *buf, size_t len);
|
|
ssize_t mp_stream_posix_read(void *stream, void *buf, size_t len);
|
|
off_t mp_stream_posix_lseek(void *stream, off_t offset, int whence);
|
|
int mp_stream_posix_fsync(void *stream);
|
|
#endif
|
|
|
|
#if MICROPY_STREAMS_NON_BLOCK
|
|
#define mp_is_nonblocking_error(errno) ((errno) == MP_EAGAIN || (errno) == MP_EWOULDBLOCK)
|
|
#else
|
|
#define mp_is_nonblocking_error(errno) (0)
|
|
#endif
|
|
|
|
#endif // MICROPY_INCLUDED_PY_STREAM_H
|