micropython/extmod/uos_dupterm.c

146 lines
5.1 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Paul Sokolovsky
* Copyright (c) 2017 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 <string.h>
#include "py/mpconfig.h"
#include "py/runtime.h"
#include "py/objtuple.h"
#include "py/objarray.h"
#include "py/stream.h"
#include "lib/utils/interrupt_char.h"
#if MICROPY_PY_OS_DUPTERM
void mp_uos_deactivate(size_t dupterm_idx, const char *msg, mp_obj_t exc) {
mp_obj_t term = MP_STATE_VM(dupterm_objs[dupterm_idx]);
MP_STATE_VM(dupterm_objs[dupterm_idx]) = MP_OBJ_NULL;
mp_printf(&mp_plat_print, msg);
if (exc != MP_OBJ_NULL) {
mp_obj_print_exception(&mp_plat_print, exc);
}
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mp_stream_close(term);
nlr_pop();
} else {
// Ignore any errors during stream closing
}
}
int mp_uos_dupterm_rx_chr(void) {
for (size_t idx = 0; idx < MICROPY_PY_OS_DUPTERM; ++idx) {
if (MP_STATE_VM(dupterm_objs[idx]) == MP_OBJ_NULL) {
continue;
}
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mp_obj_t readinto_m[3];
mp_load_method(MP_STATE_VM(dupterm_objs[idx]), MP_QSTR_readinto, readinto_m);
readinto_m[2] = MP_STATE_VM(dupterm_arr_obj);
mp_obj_t res = mp_call_method_n_kw(1, 0, readinto_m);
if (res == mp_const_none) {
nlr_pop();
} else if (res == MP_OBJ_NEW_SMALL_INT(0)) {
nlr_pop();
mp_uos_deactivate(idx, "dupterm: EOF received, deactivating\n", MP_OBJ_NULL);
} else {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(MP_STATE_VM(dupterm_arr_obj), &bufinfo, MP_BUFFER_READ);
nlr_pop();
if (*(byte*)bufinfo.buf == mp_interrupt_char) {
// Signal keyboard interrupt to be raised as soon as the VM resumes
mp_keyboard_interrupt();
return -2;
}
return *(byte*)bufinfo.buf;
}
} else {
mp_uos_deactivate(idx, "dupterm: Exception in read() method, deactivating: ", nlr.ret_val);
}
}
// No chars available
return -1;
}
void mp_uos_dupterm_tx_strn(const char *str, size_t len) {
for (size_t idx = 0; idx < MICROPY_PY_OS_DUPTERM; ++idx) {
if (MP_STATE_VM(dupterm_objs[idx]) == MP_OBJ_NULL) {
continue;
}
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mp_obj_t write_m[3];
mp_load_method(MP_STATE_VM(dupterm_objs[idx]), MP_QSTR_write, write_m);
mp_obj_array_t *arr = MP_OBJ_TO_PTR(MP_STATE_VM(dupterm_arr_obj));
void *org_items = arr->items;
arr->items = (void*)str;
arr->len = len;
write_m[2] = MP_STATE_VM(dupterm_arr_obj);
mp_call_method_n_kw(1, 0, write_m);
arr = MP_OBJ_TO_PTR(MP_STATE_VM(dupterm_arr_obj));
arr->items = org_items;
arr->len = 1;
nlr_pop();
} else {
mp_uos_deactivate(idx, "dupterm: Exception in write() method, deactivating: ", nlr.ret_val);
}
}
}
STATIC mp_obj_t mp_uos_dupterm(size_t n_args, const mp_obj_t *args) {
mp_int_t idx = 0;
if (n_args == 2) {
idx = mp_obj_get_int(args[1]);
}
if (idx < 0 || idx >= MICROPY_PY_OS_DUPTERM) {
mp_raise_ValueError("invalid dupterm index");
}
mp_obj_t previous_obj = MP_STATE_VM(dupterm_objs[idx]);
if (previous_obj == MP_OBJ_NULL) {
previous_obj = mp_const_none;
}
if (args[0] == mp_const_none) {
MP_STATE_VM(dupterm_objs[idx]) = MP_OBJ_NULL;
} else {
MP_STATE_VM(dupterm_objs[idx]) = args[0];
if (MP_STATE_VM(dupterm_arr_obj) == MP_OBJ_NULL) {
MP_STATE_VM(dupterm_arr_obj) = mp_obj_new_bytearray(1, "");
}
}
return previous_obj;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_uos_dupterm_obj, 1, 2, mp_uos_dupterm);
#endif