| /* |
| * This file is part of the MicroPython project, http://micropython.org/ |
| * |
| * The MIT License (MIT) |
| * |
| * Copyright (c) 2016 Paul Sokolovsky |
| * Copyright (c) 2017-2019 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 "extmod/misc.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 |
| } |
| } |
| |
| uintptr_t mp_uos_dupterm_poll(uintptr_t poll_flags) { |
| uintptr_t poll_flags_out = 0; |
| |
| for (size_t idx = 0; idx < MICROPY_PY_OS_DUPTERM; ++idx) { |
| mp_obj_t s = MP_STATE_VM(dupterm_objs[idx]); |
| if (s == MP_OBJ_NULL) { |
| continue; |
| } |
| |
| int errcode = 0; |
| mp_uint_t ret = 0; |
| const mp_stream_p_t *stream_p = mp_get_stream(s); |
| #if MICROPY_PY_UOS_DUPTERM_BUILTIN_STREAM |
| if (mp_uos_dupterm_is_builtin_stream(s)) { |
| ret = stream_p->ioctl(s, MP_STREAM_POLL, poll_flags, &errcode); |
| } else |
| #endif |
| { |
| nlr_buf_t nlr; |
| if (nlr_push(&nlr) == 0) { |
| ret = stream_p->ioctl(s, MP_STREAM_POLL, poll_flags, &errcode); |
| nlr_pop(); |
| } else { |
| // Ignore error with ioctl |
| } |
| } |
| |
| if (ret != MP_STREAM_ERROR) { |
| poll_flags_out |= ret; |
| if (poll_flags_out == poll_flags) { |
| // Finish early if all requested flags are set |
| break; |
| } |
| } |
| } |
| |
| return poll_flags_out; |
| } |
| |
| 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; |
| } |
| |
| #if MICROPY_PY_UOS_DUPTERM_BUILTIN_STREAM |
| if (mp_uos_dupterm_is_builtin_stream(MP_STATE_VM(dupterm_objs[idx]))) { |
| byte buf[1]; |
| int errcode = 0; |
| 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 (errcode == 0 && out_sz != 0) { |
| return buf[0]; |
| } else { |
| continue; |
| } |
| } |
| #endif |
| |
| 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: ", MP_OBJ_FROM_PTR(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; |
| } |
| |
| #if MICROPY_PY_UOS_DUPTERM_BUILTIN_STREAM |
| if (mp_uos_dupterm_is_builtin_stream(MP_STATE_VM(dupterm_objs[idx]))) { |
| int errcode = 0; |
| const mp_stream_p_t *stream_p = mp_get_stream(MP_STATE_VM(dupterm_objs[idx])); |
| stream_p->write(MP_STATE_VM(dupterm_objs[idx]), str, len, &errcode); |
| continue; |
| } |
| #endif |
| |
| 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: ", MP_OBJ_FROM_PTR(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_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 |