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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2024 Andrew Leech
*
* 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.
*/
#include "ringbuf.h"
#include "py/mpconfig.h"
#if MICROPY_PY_MICROPYTHON_RINGIO
#include "py/runtime.h"
#include "py/stream.h"
typedef struct _micropython_ringio_obj_t {
mp_obj_base_t base;
ringbuf_t ringbuffer;
} micropython_ringio_obj_t;
static mp_obj_t micropython_ringio_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 1, 1, false);
mp_buffer_info_t bufinfo = {NULL, 0, 0};
if (!mp_get_buffer(args[0], &bufinfo, MP_BUFFER_RW)) {
bufinfo.len = mp_obj_get_int(args[0]) + 1;
bufinfo.buf = m_new(uint8_t, bufinfo.len);
}
if (bufinfo.len < 2 || bufinfo.len > UINT16_MAX) {
mp_raise_ValueError(NULL);
}
micropython_ringio_obj_t *self = mp_obj_malloc(micropython_ringio_obj_t, type);
self->ringbuffer.buf = bufinfo.buf;
self->ringbuffer.size = bufinfo.len;
self->ringbuffer.iget = self->ringbuffer.iput = 0;
return MP_OBJ_FROM_PTR(self);
}
static mp_uint_t micropython_ringio_read(mp_obj_t self_in, void *buf_in, mp_uint_t size, int *errcode) {
micropython_ringio_obj_t *self = MP_OBJ_TO_PTR(self_in);
size = MIN(size, ringbuf_avail(&self->ringbuffer));
ringbuf_memcpy_get_internal(&(self->ringbuffer), buf_in, size);
*errcode = 0;
return size;
}
static mp_uint_t micropython_ringio_write(mp_obj_t self_in, const void *buf_in, mp_uint_t size, int *errcode) {
micropython_ringio_obj_t *self = MP_OBJ_TO_PTR(self_in);
size = MIN(size, ringbuf_free(&self->ringbuffer));
ringbuf_memcpy_put_internal(&(self->ringbuffer), buf_in, size);
*errcode = 0;
return size;
}
static mp_uint_t micropython_ringio_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
micropython_ringio_obj_t *self = MP_OBJ_TO_PTR(self_in);
switch (request) {
case MP_STREAM_POLL: {
mp_uint_t ret = 0;
if ((arg & MP_STREAM_POLL_RD) && ringbuf_avail(&self->ringbuffer) > 0) {
ret |= MP_STREAM_POLL_RD;
}
if ((arg & MP_STREAM_POLL_WR) && ringbuf_free(&self->ringbuffer) > 0) {
ret |= MP_STREAM_POLL_WR;
}
return ret;
}
case MP_STREAM_CLOSE:
return 0;
}
*errcode = MP_EINVAL;
return MP_STREAM_ERROR;
}
static mp_obj_t micropython_ringio_any(mp_obj_t self_in) {
micropython_ringio_obj_t *self = MP_OBJ_TO_PTR(self_in);
return MP_OBJ_NEW_SMALL_INT(ringbuf_avail(&self->ringbuffer));
}
static MP_DEFINE_CONST_FUN_OBJ_1(micropython_ringio_any_obj, micropython_ringio_any);
static const mp_rom_map_elem_t micropython_ringio_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_any), MP_ROM_PTR(µpython_ringio_any_obj) },
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
};
static MP_DEFINE_CONST_DICT(micropython_ringio_locals_dict, micropython_ringio_locals_dict_table);
static const mp_stream_p_t ringio_stream_p = {
.read = micropython_ringio_read,
.write = micropython_ringio_write,
.ioctl = micropython_ringio_ioctl,
.is_text = false,
};
MP_DEFINE_CONST_OBJ_TYPE(
mp_type_ringio,
MP_QSTR_RingIO,
MP_TYPE_FLAG_NONE,
make_new, micropython_ringio_make_new,
protocol, &ringio_stream_p,
locals_dict, µpython_ringio_locals_dict
);
#endif // MICROPY_PY_MICROPYTHON_RINGIO
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