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// Copyright (c) 2016 Paul Sokolovsky
// SPDX-FileCopyrightText: 2014 MicroPython & CircuitPython contributors (https://github.com/adafruit/circuitpython/graphs/contributors)
// SPDX-FileCopyrightText: Copyright (c) 2017 Damien P. George
//
// SPDX-License-Identifier: MIT
#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"
#include "supervisor/shared/translate.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) {
byte buf[1];
int errcode;
const mp_stream_p_t *stream_p = mp_get_stream(MP_STATE_VM(dupterm_objs[idx]));
mp_uint_t out_sz = stream_p->read(MP_STATE_VM(dupterm_objs[idx]), buf, 1, &errcode);
if (out_sz == 0) {
nlr_pop();
mp_uos_deactivate(idx, "dupterm: EOF received, deactivating\n", MP_OBJ_NULL);
} else if (out_sz == MP_STREAM_ERROR) {
// errcode is valid
if (mp_is_nonblocking_error(errcode)) {
nlr_pop();
} else {
mp_raise_OSError(errcode);
}
} else {
// read 1 byte
nlr_pop();
if (buf[0] == mp_interrupt_char) {
// Signal keyboard interrupt to be raised as soon as the VM resumes
mp_keyboard_interrupt();
return -2;
}
return buf[0];
}
} 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_stream_write(MP_STATE_VM(dupterm_objs[idx]), str, len, MP_STREAM_RW_WRITE);
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(translate("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_get_stream_raise(args[0], MP_STREAM_OP_READ | MP_STREAM_OP_WRITE | MP_STREAM_OP_IOCTL);
MP_STATE_VM(dupterm_objs[idx]) = args[0];
}
return previous_obj;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_uos_dupterm_obj, 1, 2, mp_uos_dupterm);
#endif
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