micropython/stmhal/pyexec.c

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/*
* This file is part of the Micro Python 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.
*/
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#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
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#include "py/nlr.h"
#include "py/compile.h"
#include "py/runtime.h"
#include "py/repl.h"
#include "py/gc.h"
#ifdef MICROPY_HAL_H
#include MICROPY_HAL_H
#endif
#include "readline.h"
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#include "pyexec.h"
#include "genhdr/py-version.h"
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pyexec_mode_kind_t pyexec_mode_kind = PYEXEC_MODE_FRIENDLY_REPL;
STATIC bool repl_display_debugging_info = 0;
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#define EXEC_FLAG_PRINT_EOF (1)
#define EXEC_FLAG_ALLOW_DEBUGGING (2)
#define EXEC_FLAG_IS_REPL (4)
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// parses, compiles and executes the code in the lexer
// frees the lexer before returning
// EXEC_FLAG_PRINT_EOF prints 2 EOF chars: 1 after normal output, 1 after exception output
// EXEC_FLAG_ALLOW_DEBUGGING allows debugging info to be printed after executing the code
// EXEC_FLAG_IS_REPL is used for REPL inputs (flag passed on to mp_compile)
STATIC int parse_compile_execute(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, int exec_flags) {
int ret = 0;
uint32_t start = 0;
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nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
// parse and compile the script
qstr source_name = lex->source_name;
mp_parse_node_t pn = mp_parse(lex, input_kind);
mp_obj_t module_fun = mp_compile(pn, source_name, MP_EMIT_OPT_NONE, exec_flags & EXEC_FLAG_IS_REPL);
// execute code
mp_hal_set_interrupt_char(CHAR_CTRL_C); // allow ctrl-C to interrupt us
start = HAL_GetTick();
mp_call_function_0(module_fun);
mp_hal_set_interrupt_char(-1); // disable interrupt
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nlr_pop();
ret = 1;
if (exec_flags & EXEC_FLAG_PRINT_EOF) {
mp_hal_stdout_tx_strn("\x04", 1);
}
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} else {
// uncaught exception
// FIXME it could be that an interrupt happens just before we disable it here
mp_hal_set_interrupt_char(-1); // disable interrupt
// print EOF after normal output
if (exec_flags & EXEC_FLAG_PRINT_EOF) {
mp_hal_stdout_tx_strn("\x04", 1);
}
// check for SystemExit
if (mp_obj_is_subclass_fast(mp_obj_get_type((mp_obj_t)nlr.ret_val), &mp_type_SystemExit)) {
// at the moment, the value of SystemExit is unused
ret = PYEXEC_FORCED_EXIT;
} else {
mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
ret = 0;
}
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}
// display debugging info if wanted
if ((exec_flags & EXEC_FLAG_ALLOW_DEBUGGING) && repl_display_debugging_info) {
mp_uint_t ticks = HAL_GetTick() - start; // TODO implement a function that does this properly
printf("took " UINT_FMT " ms\n", ticks);
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gc_collect();
// qstr info
{
mp_uint_t n_pool, n_qstr, n_str_data_bytes, n_total_bytes;
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qstr_pool_info(&n_pool, &n_qstr, &n_str_data_bytes, &n_total_bytes);
printf("qstr:\n n_pool=" UINT_FMT "\n n_qstr=" UINT_FMT "\n n_str_data_bytes=" UINT_FMT "\n n_total_bytes=" UINT_FMT "\n", n_pool, n_qstr, n_str_data_bytes, n_total_bytes);
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}
// GC info
gc_dump_info();
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}
if (exec_flags & EXEC_FLAG_PRINT_EOF) {
mp_hal_stdout_tx_strn("\x04", 1);
}
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return ret;
}
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int pyexec_raw_repl(void) {
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vstr_t line;
vstr_init(&line, 32);
raw_repl_reset:
mp_hal_stdout_tx_str("raw REPL; CTRL-B to exit\r\n");
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for (;;) {
vstr_reset(&line);
mp_hal_stdout_tx_str(">");
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for (;;) {
int c = mp_hal_stdin_rx_chr();
if (c == CHAR_CTRL_A) {
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// reset raw REPL
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goto raw_repl_reset;
} else if (c == CHAR_CTRL_B) {
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// change to friendly REPL
mp_hal_stdout_tx_str("\r\n");
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vstr_clear(&line);
pyexec_mode_kind = PYEXEC_MODE_FRIENDLY_REPL;
return 0;
} else if (c == CHAR_CTRL_C) {
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// clear line
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vstr_reset(&line);
} else if (c == CHAR_CTRL_D) {
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// input finished
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break;
} else if (c <= 127) {
// let through any other ASCII character
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vstr_add_char(&line, c);
}
}
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// indicate reception of command
mp_hal_stdout_tx_str("OK");
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if (line.len == 0) {
// exit for a soft reset
mp_hal_stdout_tx_str("\r\n");
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vstr_clear(&line);
return PYEXEC_FORCED_EXIT;
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}
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mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, line.buf, line.len, 0);
if (lex == NULL) {
printf("\x04MemoryError\n\x04");
} else {
int ret = parse_compile_execute(lex, MP_PARSE_FILE_INPUT, EXEC_FLAG_PRINT_EOF);
if (ret & PYEXEC_FORCED_EXIT) {
return ret;
}
}
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}
}
#if MICROPY_REPL_EVENT_DRIVEN
typedef struct _friendly_repl_t {
vstr_t line;
bool cont_line;
} friendly_repl_t;
friendly_repl_t repl;
void pyexec_friendly_repl_init(void) {
vstr_init(&repl.line, 32);
repl.cont_line = false;
readline_init(&repl.line);
mp_hal_stdout_tx_str(">>> ");
}
void pyexec_friendly_repl_reset() {
repl.cont_line = false;
vstr_reset(&repl.line);
readline_init(&repl.line);
}
int pyexec_friendly_repl_process_char(int c) {
int ret = readline_process_char(c);
if (!repl.cont_line) {
if (ret == CHAR_CTRL_A) {
// change to raw REPL
pyexec_mode_kind = PYEXEC_MODE_RAW_REPL;
mp_hal_stdout_tx_str("\r\n");
vstr_clear(&repl.line);
return PYEXEC_SWITCH_MODE;
} else if (ret == CHAR_CTRL_B) {
// reset friendly REPL
mp_hal_stdout_tx_str("\r\n");
goto friendly_repl_reset;
} else if (ret == CHAR_CTRL_C) {
// break
mp_hal_stdout_tx_str("\r\n");
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// exit for a soft reset
mp_hal_stdout_tx_str("\r\n");
vstr_clear(&repl.line);
return PYEXEC_FORCED_EXIT;
} else if (vstr_len(&repl.line) == 0) {
//goto input_restart;
}
if (ret < 0) {
return 0;
}
if (!mp_repl_continue_with_input(vstr_null_terminated_str(&repl.line))) {
goto exec;
}
vstr_add_byte(&repl.line, '\n');
repl.cont_line = true;
mp_hal_stdout_tx_str("... ");
readline_note_newline();
return 0;
} else {
if (ret == CHAR_CTRL_C) {
// cancel everything
mp_hal_stdout_tx_str("\r\n");
repl.cont_line = false;
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// stop entering compound statement
goto exec;
}
if (ret < 0) {
return 0;
}
if (mp_repl_continue_with_input(vstr_null_terminated_str(&repl.line))) {
vstr_add_byte(&repl.line, '\n');
mp_hal_stdout_tx_str("... ");
readline_note_newline();
return 0;
}
exec: ;
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&repl.line), vstr_len(&repl.line), 0);
if (lex == NULL) {
printf("MemoryError\n");
} else {
int ret = parse_compile_execute(lex, MP_PARSE_SINGLE_INPUT, EXEC_FLAG_ALLOW_DEBUGGING | EXEC_FLAG_IS_REPL);
if (ret & PYEXEC_FORCED_EXIT) {
return ret;
}
}
friendly_repl_reset: // TODO
input_restart:
pyexec_friendly_repl_reset();
mp_hal_stdout_tx_str(">>> ");
return 0;
}
}
#else //MICROPY_REPL_EVENT_DRIVEN
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int pyexec_friendly_repl(void) {
vstr_t line;
vstr_init(&line, 32);
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#if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
// in host mode, we enable the LCD for the repl
mp_obj_t lcd_o = mp_call_function_0(mp_load_name(qstr_from_str("LCD")));
mp_call_function_1(mp_load_attr(lcd_o, qstr_from_str("light")), mp_const_true);
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#endif
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friendly_repl_reset:
mp_hal_stdout_tx_str("Micro Python " MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE "; " MICROPY_HW_BOARD_NAME " with " MICROPY_HW_MCU_NAME "\r\n");
mp_hal_stdout_tx_str("Type \"help()\" for more information.\r\n");
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// to test ctrl-C
/*
{
uint32_t x[4] = {0x424242, 0xdeaddead, 0x242424, 0xdeadbeef};
for (;;) {
nlr_buf_t nlr;
printf("pyexec_repl: %p\n", x);
mp_hal_set_interrupt_char(CHAR_CTRL_C);
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if (nlr_push(&nlr) == 0) {
for (;;) {
}
} else {
printf("break\n");
}
}
}
*/
for (;;) {
input_restart:
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vstr_reset(&line);
int ret = readline(&line, ">>> ");
if (ret == CHAR_CTRL_A) {
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// change to raw REPL
mp_hal_stdout_tx_str("\r\n");
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vstr_clear(&line);
pyexec_mode_kind = PYEXEC_MODE_RAW_REPL;
return 0;
} else if (ret == CHAR_CTRL_B) {
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// reset friendly REPL
mp_hal_stdout_tx_str("\r\n");
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goto friendly_repl_reset;
} else if (ret == CHAR_CTRL_C) {
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// break
mp_hal_stdout_tx_str("\r\n");
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continue;
} else if (ret == CHAR_CTRL_D) {
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// exit for a soft reset
mp_hal_stdout_tx_str("\r\n");
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vstr_clear(&line);
return PYEXEC_FORCED_EXIT;
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} else if (vstr_len(&line) == 0) {
continue;
}
while (mp_repl_continue_with_input(vstr_null_terminated_str(&line))) {
vstr_add_byte(&line, '\n');
ret = readline(&line, "... ");
if (ret == CHAR_CTRL_C) {
// cancel everything
mp_hal_stdout_tx_str("\r\n");
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// stop entering compound statement
break;
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}
}
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&line), vstr_len(&line), 0);
if (lex == NULL) {
printf("MemoryError\n");
} else {
ret = parse_compile_execute(lex, MP_PARSE_SINGLE_INPUT, EXEC_FLAG_ALLOW_DEBUGGING | EXEC_FLAG_IS_REPL);
if (ret & PYEXEC_FORCED_EXIT) {
return ret;
}
}
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}
}
#endif //MICROPY_REPL_EVENT_DRIVEN
int pyexec_file(const char *filename) {
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mp_lexer_t *lex = mp_lexer_new_from_file(filename);
if (lex == NULL) {
printf("could not open file '%s' for reading\n", filename);
return false;
}
return parse_compile_execute(lex, MP_PARSE_FILE_INPUT, 0);
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}
mp_obj_t pyb_set_repl_info(mp_obj_t o_value) {
repl_display_debugging_info = mp_obj_get_int(o_value);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(pyb_set_repl_info_obj, pyb_set_repl_info);