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circuitpython/unix/main.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.
*/
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>
#include "py/mpstate.h"
#include "py/nlr.h"
#include "py/compile.h"
#include "py/runtime.h"
#include "py/builtin.h"
#include "py/repl.h"
#include "py/gc.h"
#include "py/stackctrl.h"
#include "genhdr/mpversion.h"
#include MICROPY_HAL_H
#include "input.h"
// Command line options, with their defaults
STATIC bool compile_only = false;
STATIC uint emit_opt = MP_EMIT_OPT_NONE;
mp_uint_t mp_verbose_flag = 0;
#if MICROPY_ENABLE_GC
// Heap size of GC heap (if enabled)
// Make it larger on a 64 bit machine, because pointers are larger.
long heap_size = 1024*1024 * (sizeof(mp_uint_t) / 4);
#endif
STATIC void stderr_print_strn(void *env, const char *str, mp_uint_t len) {
(void)env;
fwrite(str, len, 1, stderr);
}
const mp_print_t mp_stderr_print = {NULL, stderr_print_strn};
#define FORCED_EXIT (0x100)
// If exc is SystemExit, return value where FORCED_EXIT bit set,
// and lower 8 bits are SystemExit value. For all other exceptions,
// return 1.
STATIC int handle_uncaught_exception(mp_obj_t exc) {
// check for SystemExit
if (mp_obj_is_subclass_fast(mp_obj_get_type(exc), &mp_type_SystemExit)) {
// None is an exit value of 0; an int is its value; anything else is 1
mp_obj_t exit_val = mp_obj_exception_get_value(exc);
mp_int_t val = 0;
if (exit_val != mp_const_none && !mp_obj_get_int_maybe(exit_val, &val)) {
val = 1;
}
return FORCED_EXIT | (val & 255);
}
// Report all other exceptions
mp_obj_print_exception(&mp_stderr_print, exc);
return 1;
}
// Returns standard error codes: 0 for success, 1 for all other errors,
// except if FORCED_EXIT bit is set then script raised SystemExit and the
// value of the exit is in the lower 8 bits of the return value
STATIC int execute_from_lexer(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, bool is_repl) {
if (lex == NULL) {
printf("MemoryError: lexer could not allocate memory\n");
return 1;
}
mp_hal_set_interrupt_char(CHAR_CTRL_C);
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
qstr source_name = lex->source_name;
#if MICROPY_PY___FILE__
if (input_kind == MP_PARSE_FILE_INPUT) {
mp_store_global(MP_QSTR___file__, MP_OBJ_NEW_QSTR(source_name));
}
#endif
mp_parse_tree_t parse_tree = mp_parse(lex, input_kind);
/*
printf("----------------\n");
mp_parse_node_print(parse_tree.root, 0);
printf("----------------\n");
*/
mp_obj_t module_fun = mp_compile(&parse_tree, source_name, emit_opt, is_repl);
if (!compile_only) {
// execute it
mp_call_function_0(module_fun);
}
mp_hal_set_interrupt_char(-1);
nlr_pop();
return 0;
} else {
// uncaught exception
mp_hal_set_interrupt_char(-1);
return handle_uncaught_exception((mp_obj_t)nlr.ret_val);
}
}
#if MICROPY_USE_READLINE == 1
#include "lib/mp-readline/readline.h"
#else
STATIC char *strjoin(const char *s1, int sep_char, const char *s2) {
int l1 = strlen(s1);
int l2 = strlen(s2);
char *s = malloc(l1 + l2 + 2);
memcpy(s, s1, l1);
if (sep_char != 0) {
s[l1] = sep_char;
l1 += 1;
}
memcpy(s + l1, s2, l2);
s[l1 + l2] = 0;
return s;
}
#endif
STATIC int do_repl(void) {
mp_hal_stdout_tx_str("MicroPython " MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE "; "
MICROPY_PY_SYS_PLATFORM " version\nUse CTRL-D to exit, CTRL-E for paste mode\n");
#if MICROPY_USE_READLINE == 1
// use MicroPython supplied readline
vstr_t line;
vstr_init(&line, 16);
for (;;) {
mp_hal_stdio_mode_raw();
input_restart:
vstr_reset(&line);
int ret = readline(&line, ">>> ");
mp_parse_input_kind_t parse_input_kind = MP_PARSE_SINGLE_INPUT;
if (ret == CHAR_CTRL_D) {
// EOF
printf("\n");
mp_hal_stdio_mode_orig();
vstr_clear(&line);
return 0;
} else if (ret == CHAR_CTRL_E) {
// paste mode
mp_hal_stdout_tx_str("\npaste mode; CTRL-C to cancel, CTRL-D to finish\n=== ");
vstr_reset(&line);
for (;;) {
char c = mp_hal_stdin_rx_chr();
if (c == CHAR_CTRL_C) {
// cancel everything
mp_hal_stdout_tx_str("\n");
goto input_restart;
} else if (c == CHAR_CTRL_D) {
// end of input
mp_hal_stdout_tx_str("\n");
break;
} else {
// add char to buffer and echo
vstr_add_byte(&line, c);
if (c == '\r') {
mp_hal_stdout_tx_str("\n=== ");
} else {
mp_hal_stdout_tx_strn(&c, 1);
}
}
}
parse_input_kind = MP_PARSE_FILE_INPUT;
} else if (line.len == 0) {
if (ret != 0) {
printf("\n");
}
goto input_restart;
} else {
// got a line with non-zero length, see if it needs continuing
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
printf("\n");
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// stop entering compound statement
break;
}
}
}
mp_hal_stdio_mode_orig();
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, line.buf, line.len, false);
ret = execute_from_lexer(lex, parse_input_kind, true);
if (ret & FORCED_EXIT) {
return ret;
}
}
#else
// use GNU or simple readline
for (;;) {
char *line = prompt(">>> ");
if (line == NULL) {
// EOF
return 0;
}
while (mp_repl_continue_with_input(line)) {
char *line2 = prompt("... ");
if (line2 == NULL) {
break;
}
char *line3 = strjoin(line, '\n', line2);
free(line);
free(line2);
line = line3;
}
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, line, strlen(line), false);
int ret = execute_from_lexer(lex, MP_PARSE_SINGLE_INPUT, true);
if (ret & FORCED_EXIT) {
return ret;
}
free(line);
}
#endif
}
STATIC int do_file(const char *file) {
mp_lexer_t *lex = mp_lexer_new_from_file(file);
return execute_from_lexer(lex, MP_PARSE_FILE_INPUT, false);
}
STATIC int do_str(const char *str) {
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, str, strlen(str), false);
return execute_from_lexer(lex, MP_PARSE_FILE_INPUT, false);
}
STATIC int usage(char **argv) {
printf(
"usage: %s [<opts>] [-X <implopt>] [-c <command>] [<filename>]\n"
"Options:\n"
"-v : verbose (trace various operations); can be multiple\n"
"-O[N] : apply bytecode optimizations of level N\n"
"\n"
"Implementation specific options:\n", argv[0]
);
int impl_opts_cnt = 0;
printf(
" compile-only -- parse and compile only\n"
" emit={bytecode,native,viper} -- set the default code emitter\n"
);
impl_opts_cnt++;
#if MICROPY_ENABLE_GC
printf(
" heapsize=<n> -- set the heap size for the GC (default %ld)\n"
, heap_size);
impl_opts_cnt++;
#endif
if (impl_opts_cnt == 0) {
printf(" (none)\n");
}
return 1;
}
// Process options which set interpreter init options
STATIC void pre_process_options(int argc, char **argv) {
for (int a = 1; a < argc; a++) {
if (argv[a][0] == '-') {
if (strcmp(argv[a], "-X") == 0) {
if (a + 1 >= argc) {
exit(usage(argv));
}
if (0) {
} else if (strcmp(argv[a + 1], "compile-only") == 0) {
compile_only = true;
} else if (strcmp(argv[a + 1], "emit=bytecode") == 0) {
emit_opt = MP_EMIT_OPT_BYTECODE;
} else if (strcmp(argv[a + 1], "emit=native") == 0) {
emit_opt = MP_EMIT_OPT_NATIVE_PYTHON;
} else if (strcmp(argv[a + 1], "emit=viper") == 0) {
emit_opt = MP_EMIT_OPT_VIPER;
#if MICROPY_ENABLE_GC
} else if (strncmp(argv[a + 1], "heapsize=", sizeof("heapsize=") - 1) == 0) {
char *end;
heap_size = strtol(argv[a + 1] + sizeof("heapsize=") - 1, &end, 0);
// Don't bring unneeded libc dependencies like tolower()
// If there's 'w' immediately after number, adjust it for
// target word size. Note that it should be *before* size
// suffix like K or M, to avoid confusion with kilowords,
// etc. the size is still in bytes, just can be adjusted
// for word size (taking 32bit as baseline).
bool word_adjust = false;
if ((*end | 0x20) == 'w') {
word_adjust = true;
end++;
}
if ((*end | 0x20) == 'k') {
heap_size *= 1024;
} else if ((*end | 0x20) == 'm') {
heap_size *= 1024 * 1024;
}
if (word_adjust) {
heap_size = heap_size * BYTES_PER_WORD / 4;
}
#endif
} else {
exit(usage(argv));
}
a++;
}
}
}
}
STATIC void set_sys_argv(char *argv[], int argc, int start_arg) {
for (int i = start_arg; i < argc; i++) {
mp_obj_list_append(mp_sys_argv, MP_OBJ_NEW_QSTR(qstr_from_str(argv[i])));
}
}
#ifdef _WIN32
#define PATHLIST_SEP_CHAR ';'
#else
#define PATHLIST_SEP_CHAR ':'
#endif
int main(int argc, char **argv) {
mp_stack_set_limit(40000 * (BYTES_PER_WORD / 4));
pre_process_options(argc, argv);
#if MICROPY_ENABLE_GC
char *heap = malloc(heap_size);
gc_init(heap, heap + heap_size);
#endif
mp_init();
#ifndef _WIN32
// create keyboard interrupt object
MP_STATE_VM(keyboard_interrupt_obj) = mp_obj_new_exception(&mp_type_KeyboardInterrupt);
#endif
char *home = getenv("HOME");
char *path = getenv("MICROPYPATH");
if (path == NULL) {
#ifdef MICROPY_PY_SYS_PATH_DEFAULT
path = MICROPY_PY_SYS_PATH_DEFAULT;
#else
path = "~/.micropython/lib:/usr/lib/micropython";
#endif
}
mp_uint_t path_num = 1; // [0] is for current dir (or base dir of the script)
for (char *p = path; p != NULL; p = strchr(p, PATHLIST_SEP_CHAR)) {
path_num++;
if (p != NULL) {
p++;
}
}
mp_obj_list_init(mp_sys_path, path_num);
mp_obj_t *path_items;
mp_obj_list_get(mp_sys_path, &path_num, &path_items);
path_items[0] = MP_OBJ_NEW_QSTR(MP_QSTR_);
{
char *p = path;
for (mp_uint_t i = 1; i < path_num; i++) {
char *p1 = strchr(p, PATHLIST_SEP_CHAR);
if (p1 == NULL) {
p1 = p + strlen(p);
}
if (p[0] == '~' && p[1] == '/' && home != NULL) {
// Expand standalone ~ to $HOME
CHECKBUF(buf, PATH_MAX);
CHECKBUF_APPEND(buf, home, strlen(home));
CHECKBUF_APPEND(buf, p + 1, (size_t)(p1 - p - 1));
path_items[i] = MP_OBJ_NEW_QSTR(qstr_from_strn(buf, CHECKBUF_LEN(buf)));
} else {
path_items[i] = MP_OBJ_NEW_QSTR(qstr_from_strn(p, p1 - p));
}
p = p1 + 1;
}
}
mp_obj_list_init(mp_sys_argv, 0);
#if defined(MICROPY_UNIX_COVERAGE)
{
MP_DECLARE_CONST_FUN_OBJ(extra_coverage_obj);
mp_store_global(QSTR_FROM_STR_STATIC("extra_coverage"), (mp_obj_t)&extra_coverage_obj);
}
#endif
// Here is some example code to create a class and instance of that class.
// First is the Python, then the C code.
//
// class TestClass:
// pass
// test_obj = TestClass()
// test_obj.attr = 42
//
// mp_obj_t test_class_type, test_class_instance;
// test_class_type = mp_obj_new_type(QSTR_FROM_STR_STATIC("TestClass"), mp_const_empty_tuple, mp_obj_new_dict(0));
// mp_store_name(QSTR_FROM_STR_STATIC("test_obj"), test_class_instance = mp_call_function_0(test_class_type));
// mp_store_attr(test_class_instance, QSTR_FROM_STR_STATIC("attr"), mp_obj_new_int(42));
/*
printf("bytes:\n");
printf(" total %d\n", m_get_total_bytes_allocated());
printf(" cur %d\n", m_get_current_bytes_allocated());
printf(" peak %d\n", m_get_peak_bytes_allocated());
*/
const int NOTHING_EXECUTED = -2;
int ret = NOTHING_EXECUTED;
for (int a = 1; a < argc; a++) {
if (argv[a][0] == '-') {
if (strcmp(argv[a], "-c") == 0) {
if (a + 1 >= argc) {
return usage(argv);
}
ret = do_str(argv[a + 1]);
if (ret & FORCED_EXIT) {
break;
}
a += 1;
} else if (strcmp(argv[a], "-m") == 0) {
if (a + 1 >= argc) {
return usage(argv);
}
mp_obj_t import_args[4];
import_args[0] = mp_obj_new_str(argv[a + 1], strlen(argv[a + 1]), false);
import_args[1] = import_args[2] = mp_const_none;
// Ask __import__ to handle imported module specially - set its __name__
// to __main__, and also return this leaf module, not top-level package
// containing it.
import_args[3] = mp_const_false;
// TODO: https://docs.python.org/3/using/cmdline.html#cmdoption-m :
// "the first element of sys.argv will be the full path to
// the module file (while the module file is being located,
// the first element will be set to "-m")."
set_sys_argv(argv, argc, a + 1);
mp_obj_t mod;
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mod = mp_builtin___import__(MP_ARRAY_SIZE(import_args), import_args);
nlr_pop();
} else {
// uncaught exception
return handle_uncaught_exception((mp_obj_t)nlr.ret_val) & 0xff;
}
if (mp_obj_is_package(mod)) {
// TODO
fprintf(stderr, "%s: -m for packages not yet implemented\n", argv[0]);
exit(1);
}
ret = 0;
break;
} else if (strcmp(argv[a], "-X") == 0) {
a += 1;
} else if (strcmp(argv[a], "-v") == 0) {
mp_verbose_flag++;
} else if (strncmp(argv[a], "-O", 2) == 0) {
if (isdigit(argv[a][2])) {
MP_STATE_VM(mp_optimise_value) = argv[a][2] & 0xf;
} else {
MP_STATE_VM(mp_optimise_value) = 0;
for (char *p = argv[a] + 1; *p && *p == 'O'; p++, MP_STATE_VM(mp_optimise_value)++);
}
} else {
return usage(argv);
}
} else {
char *pathbuf = malloc(PATH_MAX);
char *basedir = realpath(argv[a], pathbuf);
if (basedir == NULL) {
fprintf(stderr, "%s: can't open file '%s': [Errno %d] ", argv[0], argv[a], errno);
perror("");
// CPython exits with 2 in such case
ret = 2;
break;
}
// Set base dir of the script as first entry in sys.path
char *p = strrchr(basedir, '/');
path_items[0] = MP_OBJ_NEW_QSTR(qstr_from_strn(basedir, p - basedir));
free(pathbuf);
set_sys_argv(argv, argc, a);
ret = do_file(argv[a]);
break;
}
}
if (ret == NOTHING_EXECUTED) {
if (isatty(0)) {
prompt_read_history();
ret = do_repl();
prompt_write_history();
} else {
mp_lexer_t *lex = mp_lexer_new_from_fd(MP_QSTR__lt_stdin_gt_, 0, false);
ret = execute_from_lexer(lex, MP_PARSE_FILE_INPUT, false);
}
}
#if MICROPY_PY_MICROPYTHON_MEM_INFO
if (mp_verbose_flag) {
mp_micropython_mem_info(0, NULL);
}
#endif
mp_deinit();
#if MICROPY_ENABLE_GC && !defined(NDEBUG)
// We don't really need to free memory since we are about to exit the
// process, but doing so helps to find memory leaks.
free(heap);
#endif
//printf("total bytes = %d\n", m_get_total_bytes_allocated());
return ret & 0xff;
}
uint mp_import_stat(const char *path) {
struct stat st;
if (stat(path, &st) == 0) {
if (S_ISDIR(st.st_mode)) {
return MP_IMPORT_STAT_DIR;
} else if (S_ISREG(st.st_mode)) {
return MP_IMPORT_STAT_FILE;
}
}
return MP_IMPORT_STAT_NO_EXIST;
}
int DEBUG_printf(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = vfprintf(stderr, fmt, ap);
va_end(ap);
return ret;
}
void nlr_jump_fail(void *val) {
printf("FATAL: uncaught NLR %p\n", val);
exit(1);
}
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