8e048d2548
Now that error string compression is supported it's more important to have consistent error string formatting (eg all lowercase English words, consistent contractions). This commit cleans up some of the strings to make them more consistent.
512 lines
19 KiB
C
512 lines
19 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013-2019 Damien P. George
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* Copyright (c) 2014 Paul Sokolovsky
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "py/compile.h"
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#include "py/objmodule.h"
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#include "py/persistentcode.h"
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#include "py/runtime.h"
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#include "py/builtin.h"
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#include "py/frozenmod.h"
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#if MICROPY_DEBUG_VERBOSE // print debugging info
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#define DEBUG_PRINT (1)
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#define DEBUG_printf DEBUG_printf
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#else // don't print debugging info
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#define DEBUG_PRINT (0)
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#define DEBUG_printf(...) (void)0
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#endif
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#if MICROPY_ENABLE_EXTERNAL_IMPORT
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#define PATH_SEP_CHAR '/'
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bool mp_obj_is_package(mp_obj_t module) {
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mp_obj_t dest[2];
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mp_load_method_maybe(module, MP_QSTR___path__, dest);
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return dest[0] != MP_OBJ_NULL;
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}
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// Stat either frozen or normal module by a given path
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// (whatever is available, if at all).
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STATIC mp_import_stat_t mp_import_stat_any(const char *path) {
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#if MICROPY_MODULE_FROZEN
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mp_import_stat_t st = mp_frozen_stat(path);
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if (st != MP_IMPORT_STAT_NO_EXIST) {
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return st;
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}
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#endif
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return mp_import_stat(path);
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}
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STATIC mp_import_stat_t stat_file_py_or_mpy(vstr_t *path) {
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mp_import_stat_t stat = mp_import_stat_any(vstr_null_terminated_str(path));
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if (stat == MP_IMPORT_STAT_FILE) {
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return stat;
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}
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#if MICROPY_PERSISTENT_CODE_LOAD
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vstr_ins_byte(path, path->len - 2, 'm');
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stat = mp_import_stat_any(vstr_null_terminated_str(path));
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if (stat == MP_IMPORT_STAT_FILE) {
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return stat;
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}
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#endif
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return MP_IMPORT_STAT_NO_EXIST;
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}
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STATIC mp_import_stat_t stat_dir_or_file(vstr_t *path) {
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mp_import_stat_t stat = mp_import_stat_any(vstr_null_terminated_str(path));
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DEBUG_printf("stat %s: %d\n", vstr_str(path), stat);
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if (stat == MP_IMPORT_STAT_DIR) {
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return stat;
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}
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// not a directory, add .py and try as a file
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vstr_add_str(path, ".py");
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return stat_file_py_or_mpy(path);
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}
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STATIC mp_import_stat_t find_file(const char *file_str, uint file_len, vstr_t *dest) {
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#if MICROPY_PY_SYS
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// extract the list of paths
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size_t path_num;
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mp_obj_t *path_items;
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mp_obj_list_get(mp_sys_path, &path_num, &path_items);
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if (path_num != 0) {
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// go through each path looking for a directory or file
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for (size_t i = 0; i < path_num; i++) {
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vstr_reset(dest);
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size_t p_len;
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const char *p = mp_obj_str_get_data(path_items[i], &p_len);
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if (p_len > 0) {
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vstr_add_strn(dest, p, p_len);
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vstr_add_char(dest, PATH_SEP_CHAR);
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}
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vstr_add_strn(dest, file_str, file_len);
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mp_import_stat_t stat = stat_dir_or_file(dest);
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if (stat != MP_IMPORT_STAT_NO_EXIST) {
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return stat;
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}
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}
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// could not find a directory or file
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return MP_IMPORT_STAT_NO_EXIST;
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}
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#endif
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// mp_sys_path is empty, so just use the given file name
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vstr_add_strn(dest, file_str, file_len);
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return stat_dir_or_file(dest);
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}
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#if MICROPY_MODULE_FROZEN_STR || MICROPY_ENABLE_COMPILER
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STATIC void do_load_from_lexer(mp_obj_t module_obj, mp_lexer_t *lex) {
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#if MICROPY_PY___FILE__
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qstr source_name = lex->source_name;
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mp_store_attr(module_obj, MP_QSTR___file__, MP_OBJ_NEW_QSTR(source_name));
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#endif
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// parse, compile and execute the module in its context
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mp_obj_dict_t *mod_globals = mp_obj_module_get_globals(module_obj);
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mp_parse_compile_execute(lex, MP_PARSE_FILE_INPUT, mod_globals, mod_globals);
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}
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#endif
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#if MICROPY_PERSISTENT_CODE_LOAD || MICROPY_MODULE_FROZEN_MPY
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STATIC void do_execute_raw_code(mp_obj_t module_obj, mp_raw_code_t *raw_code, const char *source_name) {
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(void)source_name;
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#if MICROPY_PY___FILE__
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mp_store_attr(module_obj, MP_QSTR___file__, MP_OBJ_NEW_QSTR(qstr_from_str(source_name)));
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#endif
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// execute the module in its context
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mp_obj_dict_t *mod_globals = mp_obj_module_get_globals(module_obj);
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// save context
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mp_obj_dict_t *volatile old_globals = mp_globals_get();
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mp_obj_dict_t *volatile old_locals = mp_locals_get();
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// set new context
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mp_globals_set(mod_globals);
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mp_locals_set(mod_globals);
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nlr_buf_t nlr;
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if (nlr_push(&nlr) == 0) {
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mp_obj_t module_fun = mp_make_function_from_raw_code(raw_code, MP_OBJ_NULL, MP_OBJ_NULL);
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mp_call_function_0(module_fun);
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// finish nlr block, restore context
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nlr_pop();
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mp_globals_set(old_globals);
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mp_locals_set(old_locals);
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} else {
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// exception; restore context and re-raise same exception
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mp_globals_set(old_globals);
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mp_locals_set(old_locals);
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nlr_jump(nlr.ret_val);
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}
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}
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#endif
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STATIC void do_load(mp_obj_t module_obj, vstr_t *file) {
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#if MICROPY_MODULE_FROZEN || MICROPY_ENABLE_COMPILER || (MICROPY_PERSISTENT_CODE_LOAD && MICROPY_HAS_FILE_READER)
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char *file_str = vstr_null_terminated_str(file);
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#endif
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// If we support frozen modules (either as str or mpy) then try to find the
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// requested filename in the list of frozen module filenames.
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#if MICROPY_MODULE_FROZEN
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void *modref;
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int frozen_type = mp_find_frozen_module(file_str, file->len, &modref);
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#endif
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// If we support frozen str modules and the compiler is enabled, and we
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// found the filename in the list of frozen files, then load and execute it.
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#if MICROPY_MODULE_FROZEN_STR
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if (frozen_type == MP_FROZEN_STR) {
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do_load_from_lexer(module_obj, modref);
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return;
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}
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#endif
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// If we support frozen mpy modules and we found a corresponding file (and
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// its data) in the list of frozen files, execute it.
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#if MICROPY_MODULE_FROZEN_MPY
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if (frozen_type == MP_FROZEN_MPY) {
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do_execute_raw_code(module_obj, modref, file_str);
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return;
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}
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#endif
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// If we support loading .mpy files then check if the file extension is of
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// the correct format and, if so, load and execute the file.
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#if MICROPY_HAS_FILE_READER && MICROPY_PERSISTENT_CODE_LOAD
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if (file_str[file->len - 3] == 'm') {
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mp_raw_code_t *raw_code = mp_raw_code_load_file(file_str);
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do_execute_raw_code(module_obj, raw_code, file_str);
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return;
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}
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#endif
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// If we can compile scripts then load the file and compile and execute it.
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#if MICROPY_ENABLE_COMPILER
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{
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mp_lexer_t *lex = mp_lexer_new_from_file(file_str);
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do_load_from_lexer(module_obj, lex);
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return;
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}
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#else
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// If we get here then the file was not frozen and we can't compile scripts.
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mp_raise_msg(&mp_type_ImportError, MP_ERROR_TEXT("script compilation not supported"));
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#endif
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}
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STATIC void chop_component(const char *start, const char **end) {
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const char *p = *end;
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while (p > start) {
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if (*--p == '.') {
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*end = p;
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return;
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}
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}
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*end = p;
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}
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mp_obj_t mp_builtin___import__(size_t n_args, const mp_obj_t *args) {
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#if DEBUG_PRINT
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DEBUG_printf("__import__:\n");
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for (size_t i = 0; i < n_args; i++) {
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DEBUG_printf(" ");
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mp_obj_print(args[i], PRINT_REPR);
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DEBUG_printf("\n");
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}
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#endif
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mp_obj_t module_name = args[0];
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mp_obj_t fromtuple = mp_const_none;
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mp_int_t level = 0;
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if (n_args >= 4) {
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fromtuple = args[3];
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if (n_args >= 5) {
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level = MP_OBJ_SMALL_INT_VALUE(args[4]);
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if (level < 0) {
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mp_raise_ValueError(NULL);
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}
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}
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}
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size_t mod_len;
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const char *mod_str = mp_obj_str_get_data(module_name, &mod_len);
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if (level != 0) {
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// What we want to do here is to take name of current module,
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// chop <level> trailing components, and concatenate with passed-in
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// module name, thus resolving relative import name into absolute.
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// This even appears to be correct per
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// http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name
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// "Relative imports use a module's __name__ attribute to determine that
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// module's position in the package hierarchy."
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level--;
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mp_obj_t this_name_q = mp_obj_dict_get(MP_OBJ_FROM_PTR(mp_globals_get()), MP_OBJ_NEW_QSTR(MP_QSTR___name__));
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assert(this_name_q != MP_OBJ_NULL);
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#if MICROPY_CPYTHON_COMPAT
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if (MP_OBJ_QSTR_VALUE(this_name_q) == MP_QSTR___main__) {
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// This is a module run by -m command-line switch, get its real name from backup attribute
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this_name_q = mp_obj_dict_get(MP_OBJ_FROM_PTR(mp_globals_get()), MP_OBJ_NEW_QSTR(MP_QSTR___main__));
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}
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#endif
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mp_map_t *globals_map = &mp_globals_get()->map;
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mp_map_elem_t *elem = mp_map_lookup(globals_map, MP_OBJ_NEW_QSTR(MP_QSTR___path__), MP_MAP_LOOKUP);
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bool is_pkg = (elem != NULL);
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#if DEBUG_PRINT
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DEBUG_printf("Current module/package: ");
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mp_obj_print(this_name_q, PRINT_REPR);
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DEBUG_printf(", is_package: %d", is_pkg);
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DEBUG_printf("\n");
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#endif
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size_t this_name_l;
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const char *this_name = mp_obj_str_get_data(this_name_q, &this_name_l);
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const char *p = this_name + this_name_l;
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if (!is_pkg) {
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// We have module, but relative imports are anchored at package, so
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// go there.
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chop_component(this_name, &p);
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}
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while (level--) {
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chop_component(this_name, &p);
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}
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// We must have some component left over to import from
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if (p == this_name) {
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mp_raise_ValueError(MP_ERROR_TEXT("can't perform relative import"));
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}
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uint new_mod_l = (mod_len == 0 ? (size_t)(p - this_name) : (size_t)(p - this_name) + 1 + mod_len);
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char *new_mod = mp_local_alloc(new_mod_l);
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memcpy(new_mod, this_name, p - this_name);
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if (mod_len != 0) {
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new_mod[p - this_name] = '.';
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memcpy(new_mod + (p - this_name) + 1, mod_str, mod_len);
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}
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qstr new_mod_q = qstr_from_strn(new_mod, new_mod_l);
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mp_local_free(new_mod);
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DEBUG_printf("Resolved base name for relative import: '%s'\n", qstr_str(new_mod_q));
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module_name = MP_OBJ_NEW_QSTR(new_mod_q);
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mod_str = qstr_str(new_mod_q);
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mod_len = new_mod_l;
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}
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if (mod_len == 0) {
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mp_raise_ValueError(NULL);
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}
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// check if module already exists
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qstr module_name_qstr = mp_obj_str_get_qstr(module_name);
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mp_obj_t module_obj = mp_module_get(module_name_qstr);
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if (module_obj != MP_OBJ_NULL) {
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DEBUG_printf("Module already loaded\n");
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// If it's not a package, return module right away
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char *p = strchr(mod_str, '.');
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if (p == NULL) {
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return module_obj;
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}
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// If fromlist is not empty, return leaf module
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if (fromtuple != mp_const_none) {
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return module_obj;
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}
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// Otherwise, we need to return top-level package
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qstr pkg_name = qstr_from_strn(mod_str, p - mod_str);
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return mp_module_get(pkg_name);
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}
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DEBUG_printf("Module not yet loaded\n");
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uint last = 0;
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VSTR_FIXED(path, MICROPY_ALLOC_PATH_MAX)
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module_obj = MP_OBJ_NULL;
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mp_obj_t top_module_obj = MP_OBJ_NULL;
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mp_obj_t outer_module_obj = MP_OBJ_NULL;
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uint i;
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for (i = 1; i <= mod_len; i++) {
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if (i == mod_len || mod_str[i] == '.') {
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// create a qstr for the module name up to this depth
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qstr mod_name = qstr_from_strn(mod_str, i);
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DEBUG_printf("Processing module: %s\n", qstr_str(mod_name));
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DEBUG_printf("Previous path: =%.*s=\n", vstr_len(&path), vstr_str(&path));
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// find the file corresponding to the module name
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mp_import_stat_t stat;
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if (vstr_len(&path) == 0) {
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// first module in the dotted-name; search for a directory or file
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stat = find_file(mod_str, i, &path);
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} else {
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// latter module in the dotted-name; append to path
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vstr_add_char(&path, PATH_SEP_CHAR);
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vstr_add_strn(&path, mod_str + last, i - last);
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stat = stat_dir_or_file(&path);
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}
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DEBUG_printf("Current path: %.*s\n", vstr_len(&path), vstr_str(&path));
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if (stat == MP_IMPORT_STAT_NO_EXIST) {
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module_obj = MP_OBJ_NULL;
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#if MICROPY_MODULE_WEAK_LINKS
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// check if there is a weak link to this module
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if (i == mod_len) {
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module_obj = mp_module_search_umodule(mod_str);
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if (module_obj != MP_OBJ_NULL) {
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// found weak linked module
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mp_module_call_init(mod_name, module_obj);
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}
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}
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#endif
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if (module_obj == MP_OBJ_NULL) {
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// couldn't find the file, so fail
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#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE
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mp_raise_msg(&mp_type_ImportError, MP_ERROR_TEXT("module not found"));
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#else
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mp_raise_msg_varg(&mp_type_ImportError, MP_ERROR_TEXT("no module named '%q'"), mod_name);
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#endif
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}
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} else {
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// found the file, so get the module
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module_obj = mp_module_get(mod_name);
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}
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if (module_obj == MP_OBJ_NULL) {
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// module not already loaded, so load it!
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module_obj = mp_obj_new_module(mod_name);
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// if args[3] (fromtuple) has magic value False, set up
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// this module for command-line "-m" option (set module's
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// name to __main__ instead of real name). Do this only
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// for *modules* however - packages never have their names
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// replaced, instead they're -m'ed using a special __main__
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// submodule in them. (This all apparently is done to not
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// touch package name itself, which is important for future
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// imports).
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if (i == mod_len && fromtuple == mp_const_false && stat != MP_IMPORT_STAT_DIR) {
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mp_obj_module_t *o = MP_OBJ_TO_PTR(module_obj);
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mp_obj_dict_store(MP_OBJ_FROM_PTR(o->globals), MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR___main__));
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#if MICROPY_CPYTHON_COMPAT
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// Store module as "__main__" in the dictionary of loaded modules (returned by sys.modules).
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mp_obj_dict_store(MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_loaded_modules_dict)), MP_OBJ_NEW_QSTR(MP_QSTR___main__), module_obj);
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// Store real name in "__main__" attribute. Chosen semi-randonly, to reuse existing qstr's.
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mp_obj_dict_store(MP_OBJ_FROM_PTR(o->globals), MP_OBJ_NEW_QSTR(MP_QSTR___main__), MP_OBJ_NEW_QSTR(mod_name));
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#endif
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}
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if (stat == MP_IMPORT_STAT_DIR) {
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DEBUG_printf("%.*s is dir\n", vstr_len(&path), vstr_str(&path));
|
|
// https://docs.python.org/3/reference/import.html
|
|
// "Specifically, any module that contains a __path__ attribute is considered a package."
|
|
mp_store_attr(module_obj, MP_QSTR___path__, mp_obj_new_str(vstr_str(&path), vstr_len(&path)));
|
|
size_t orig_path_len = path.len;
|
|
vstr_add_char(&path, PATH_SEP_CHAR);
|
|
vstr_add_str(&path, "__init__.py");
|
|
if (stat_file_py_or_mpy(&path) != MP_IMPORT_STAT_FILE) {
|
|
//mp_warning("%s is imported as namespace package", vstr_str(&path));
|
|
} else {
|
|
do_load(module_obj, &path);
|
|
}
|
|
path.len = orig_path_len;
|
|
} else { // MP_IMPORT_STAT_FILE
|
|
do_load(module_obj, &path);
|
|
// This should be the last component in the import path. If there are
|
|
// remaining components then it's an ImportError because the current path
|
|
// (the module that was just loaded) is not a package. This will be caught
|
|
// on the next iteration because the file will not exist.
|
|
}
|
|
}
|
|
if (outer_module_obj != MP_OBJ_NULL) {
|
|
qstr s = qstr_from_strn(mod_str + last, i - last);
|
|
mp_store_attr(outer_module_obj, s, module_obj);
|
|
}
|
|
outer_module_obj = module_obj;
|
|
if (top_module_obj == MP_OBJ_NULL) {
|
|
top_module_obj = module_obj;
|
|
}
|
|
last = i + 1;
|
|
}
|
|
}
|
|
|
|
// If fromlist is not empty, return leaf module
|
|
if (fromtuple != mp_const_none) {
|
|
return module_obj;
|
|
}
|
|
// Otherwise, we need to return top-level package
|
|
return top_module_obj;
|
|
}
|
|
|
|
#else // MICROPY_ENABLE_EXTERNAL_IMPORT
|
|
|
|
mp_obj_t mp_builtin___import__(size_t n_args, const mp_obj_t *args) {
|
|
// Check that it's not a relative import
|
|
if (n_args >= 5 && MP_OBJ_SMALL_INT_VALUE(args[4]) != 0) {
|
|
mp_raise_NotImplementedError(MP_ERROR_TEXT("relative import"));
|
|
}
|
|
|
|
// Check if module already exists, and return it if it does
|
|
qstr module_name_qstr = mp_obj_str_get_qstr(args[0]);
|
|
mp_obj_t module_obj = mp_module_get(module_name_qstr);
|
|
if (module_obj != MP_OBJ_NULL) {
|
|
return module_obj;
|
|
}
|
|
|
|
#if MICROPY_MODULE_WEAK_LINKS
|
|
// Check if there is a weak link to this module
|
|
module_obj = mp_module_search_umodule(qstr_str(module_name_qstr));
|
|
if (module_obj != MP_OBJ_NULL) {
|
|
// Found weak-linked module
|
|
mp_module_call_init(module_name_qstr, module_obj);
|
|
return module_obj;
|
|
}
|
|
#endif
|
|
|
|
// Couldn't find the module, so fail
|
|
#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE
|
|
mp_raise_msg(&mp_type_ImportError, MP_ERROR_TEXT("module not found"));
|
|
#else
|
|
mp_raise_msg_varg(&mp_type_ImportError, MP_ERROR_TEXT("no module named '%q'"), module_name_qstr);
|
|
#endif
|
|
}
|
|
|
|
#endif // MICROPY_ENABLE_EXTERNAL_IMPORT
|
|
|
|
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin___import___obj, 1, 5, mp_builtin___import__);
|