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