micropython/ports/stm32/bufhelper.c

55 wiersze
2.0 KiB
C

/*
* This file is part of the MicroPython 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.
*/
#include "py/obj.h"
#include "bufhelper.h"
void pyb_buf_get_for_send(mp_obj_t o, mp_buffer_info_t *bufinfo, byte *tmp_data) {
if (mp_obj_is_int(o)) {
tmp_data[0] = mp_obj_get_int(o);
bufinfo->buf = tmp_data;
bufinfo->len = 1;
bufinfo->typecode = 'B';
} else {
mp_get_buffer_raise(o, bufinfo, MP_BUFFER_READ);
}
}
mp_obj_t pyb_buf_get_for_recv(mp_obj_t o, vstr_t *vstr) {
if (mp_obj_is_int(o)) {
// allocate a new bytearray of given length
vstr_init_len(vstr, mp_obj_get_int(o));
return MP_OBJ_NULL;
} else {
// get the existing buffer
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(o, &bufinfo, MP_BUFFER_WRITE);
vstr->buf = bufinfo.buf;
vstr->len = bufinfo.len;
return o;
}
}