micropython/py/stream.h

85 lines
3.3 KiB
C

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* 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"
#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) // Not yet implemented
#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
// Argument structure for MP_STREAM_SEEK
struct mp_stream_seek_t {
mp_off_t offset;
int whence;
};
MP_DECLARE_CONST_FUN_OBJ(mp_stream_read_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_readinto_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_readall_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_unbuffered_readline_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_unbuffered_readlines_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_write_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_seek_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_tell_obj);
MP_DECLARE_CONST_FUN_OBJ(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)
const mp_stream_p_t *mp_get_stream_raise(mp_obj_t self_in, int flags);
// 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);
// Helper function to write entire buf to *blocking* stream
mp_uint_t mp_stream_writeall(mp_obj_t stream, const byte *buf, mp_uint_t size, int *errcode);
#if MICROPY_STREAMS_NON_BLOCK
// TODO: This is POSIX-specific (but then POSIX is the only real thing,
// and anything else just emulates it, right?)
#define mp_is_nonblocking_error(errno) ((errno) == EAGAIN || (errno) == EWOULDBLOCK)
#else
#define mp_is_nonblocking_error(errno) (0)
#endif
#endif // __MICROPY_INCLUDED_PY_STREAM_H__
void mp_stream_write_adaptor(void *self, const char *buf, size_t len);