STATIC void mp_help_print_info_about_object(mp_obj_t name_o, mp_obj_t value) { mp_print_str(MP_PYTHON_PRINTER, " "); mp_obj_print(name_o, PRINT_STR); mp_print_str(MP_PYTHON_PRINTER, " -- "); mp_obj_print(value, PRINT_STR); mp_print_str(MP_PYTHON_PRINTER, "\n"); }
STATIC void pyb_help_print_info_about_object(mp_obj_t name_o, mp_obj_t value) { mp_printf(&mp_plat_print, " "); mp_obj_print(name_o, PRINT_STR); mp_printf(&mp_plat_print, " -- "); mp_obj_print(value, PRINT_STR); mp_printf(&mp_plat_print, "\n"); }
STATIC mp_obj_t mp_builtin___repl_print__(mp_obj_t o) { if (o != mp_const_none) { mp_obj_print(o, PRINT_REPR); printf("\n"); } return mp_const_none; }
STATIC mp_obj_t pyb_help(uint n_args, const mp_obj_t *args) { if (n_args == 0) { // print a general help message printf("%s", help_text); } else { // try to print something sensible about the given object printf("object "); mp_obj_print(args[0], PRINT_STR); printf(" is of type %s\n", mp_obj_get_type_str(args[0])); mp_map_t *map = NULL; if (MP_OBJ_IS_TYPE(args[0], &mp_type_module)) { map = mp_obj_dict_get_map(mp_obj_module_get_globals(args[0])); } else { mp_obj_type_t *type; if (MP_OBJ_IS_TYPE(args[0], &mp_type_type)) { type = args[0]; } else { type = mp_obj_get_type(args[0]); } if (type->locals_dict != MP_OBJ_NULL && MP_OBJ_IS_TYPE(type->locals_dict, &mp_type_dict)) { map = mp_obj_dict_get_map(type->locals_dict); } } if (map != NULL) { for (uint i = 0; i < map->alloc; i++) { if (map->table[i].key != MP_OBJ_NULL) { pyb_help_print_info_about_object(map->table[i].key, map->table[i].value); } } } } return mp_const_none; }
void mp_map_dump(mp_map_t *map) { for (size_t i = 0; i < map->alloc; i++) { if (map->table[i].key != NULL) { mp_obj_print(map->table[i].key, PRINT_REPR); } else { printf("(nil)"); } printf(": %p\n", map->table[i].value); } printf("---\n"); }
STATIC mp_obj_t mp_builtin_input(uint n_args, const mp_obj_t *args) { if (n_args == 1) { mp_obj_print(args[0], PRINT_STR); } vstr_t line; vstr_init(&line, 16); int ret = readline(&line, ""); if (line.len == 0 && ret == CHAR_CTRL_D) { nlr_raise(mp_obj_new_exception(&mp_type_EOFError)); } return mp_obj_new_str_from_vstr(&mp_type_str, &line); }
STATIC mp_obj_t mp_builtin_input(uint n_args, const mp_obj_t *args) { if (n_args == 1) { mp_obj_print(args[0], PRINT_REPR); } vstr_t line; vstr_init(&line, 16); int ret = readline(&line, ""); if (line.len == 0 && ret == VCP_CHAR_CTRL_D) { nlr_raise(mp_obj_new_exception(&mp_type_EOFError)); } mp_obj_t o = mp_obj_new_str((const byte*)line.buf, line.len, false); vstr_clear(&line); return o; }
void timer_interrupt(void) { if (timer_py_callback != mp_const_none) { nlr_buf_t nlr; if (nlr_push(&nlr) == 0) { // XXX what to do if the GC is in the middle of running?? rt_call_function_0(timer_py_callback); nlr_pop(); } else { // uncaught exception printf("exception in timer interrupt\n"); mp_obj_print((mp_obj_t)nlr.ret_val); printf("\n"); } } }
STATIC void mp_help_print_obj(mp_obj_t obj) { #if MICROPY_PY_BUILTINS_HELP_MODULES if (obj == MP_OBJ_NEW_QSTR(MP_QSTR_modules)) { mp_help_print_modules(); return; } #endif // Extract method from bound method, for better error messages if (mp_obj_get_type(obj)->name == MP_QSTR_bound_method) { obj = ((mp_obj_t*)obj)[1]; // extract method } // Hook into platform-specific help for this object extern bool mp_plat_specific_help(mp_obj_t obj); if (mp_plat_specific_help(obj)) { return; } // try to print something sensible about the given object mp_print_str(MP_PYTHON_PRINTER, "object "); mp_obj_print(obj, PRINT_STR); mp_printf(MP_PYTHON_PRINTER, " is of type %s\n", mp_obj_get_type_str(obj)); mp_map_t *map = NULL; if (MP_OBJ_IS_TYPE(obj, &mp_type_module)) { map = mp_obj_dict_get_map(mp_obj_module_get_globals(obj)); } else { mp_obj_type_t *type; if (MP_OBJ_IS_TYPE(obj, &mp_type_type)) { type = obj; } else { type = mp_obj_get_type(obj); } if (type->locals_dict != MP_OBJ_NULL && MP_OBJ_IS_TYPE(type->locals_dict, &mp_type_dict)) { map = mp_obj_dict_get_map(type->locals_dict); } } if (map != NULL) { for (uint i = 0; i < map->alloc; i++) { if (map->table[i].key != MP_OBJ_NULL) { mp_help_print_info_about_object(map->table[i].key, map->table[i].value); } } } }
// helper function to print an exception with traceback void mp_obj_print_exception(mp_obj_t exc) { if (mp_obj_is_exception_instance(exc)) { machine_uint_t n, *values; mp_obj_exception_get_traceback(exc, &n, &values); if (n > 0) { assert(n % 3 == 0); printf("Traceback (most recent call last):\n"); for (int i = n - 3; i >= 0; i -= 3) { #if MICROPY_ENABLE_SOURCE_LINE printf(" File \"%s\", line %d, in %s\n", qstr_str(values[i]), (int)values[i + 1], qstr_str(values[i + 2])); #else printf(" File \"%s\", in %s\n", qstr_str(values[i]), qstr_str(values[i + 2])); #endif } } } mp_obj_print(exc, PRINT_EXC); printf("\n"); }
STATIC mp_obj_t mp_builtin_print(uint n_args, const mp_obj_t *args, mp_map_t *kwargs) { mp_map_elem_t *sep_elem = mp_map_lookup(kwargs, MP_OBJ_NEW_QSTR(MP_QSTR_sep), MP_MAP_LOOKUP); mp_map_elem_t *end_elem = mp_map_lookup(kwargs, MP_OBJ_NEW_QSTR(MP_QSTR_end), MP_MAP_LOOKUP); const char *sep_data = " "; uint sep_len = 1; const char *end_data = "\n"; uint end_len = 1; if (sep_elem != NULL && sep_elem->value != mp_const_none) { sep_data = mp_obj_str_get_data(sep_elem->value, &sep_len); } if (end_elem != NULL && end_elem->value != mp_const_none) { end_data = mp_obj_str_get_data(end_elem->value, &end_len); } for (int i = 0; i < n_args; i++) { if (i > 0) { printf("%.*s", sep_len, sep_data); } mp_obj_print(args[i], PRINT_STR); } printf("%.*s", end_len, end_data); return mp_const_none; }
// C API used to convert a user-supplied pin name into an ordinal pin number. const pin_obj_t *pin_map_user_obj(mp_obj_t user_obj) { const pin_obj_t *pin_obj; // If a pin was provided, then use it if (MP_OBJ_IS_TYPE(user_obj, &pin_obj_type)) { pin_obj = user_obj; if (pin_map_obj.debug) { printf("Pin map passed pin "); mp_obj_print((mp_obj_t)pin_obj, PRINT_STR); printf("\n"); } return pin_obj; } if (pin_map_obj.mapper) { pin_obj = mp_call_function_1(pin_map_obj.mapper, user_obj); if (pin_obj != mp_const_none) { if (!MP_OBJ_IS_TYPE(pin_obj, &pin_obj_type)) { nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Pin.mapper didn't return a Pin object")); } if (pin_map_obj.debug) { printf("Pin.mapper maps "); mp_obj_print(user_obj, PRINT_REPR); printf(" to "); mp_obj_print((mp_obj_t)pin_obj, PRINT_STR); printf("\n"); } return pin_obj; } // The pin mapping function returned mp_const_none, fall through to // other lookup methods. } if (pin_map_obj.map_dict) { mp_map_t *pin_map_map = mp_obj_dict_get_map(pin_map_obj.map_dict); mp_map_elem_t *elem = mp_map_lookup(pin_map_map, user_obj, MP_MAP_LOOKUP); if (elem != NULL && elem->value != NULL) { pin_obj = elem->value; if (pin_map_obj.debug) { printf("Pin.map_dict maps "); mp_obj_print(user_obj, PRINT_REPR); printf(" to "); mp_obj_print((mp_obj_t)pin_obj, PRINT_STR); printf("\n"); } return pin_obj; } } // See if the pin name matches a board pin const char *pin_name = mp_obj_str_get_str(user_obj); pin_obj = pin_find_named_pin(pin_board_pins, pin_name); if (pin_obj) { if (pin_map_obj.debug) { printf("Pin.board maps "); mp_obj_print(user_obj, PRINT_REPR); printf(" to "); mp_obj_print((mp_obj_t)pin_obj, PRINT_STR); printf("\n"); } return pin_obj; } // See if the pin name matches a cpu pin pin_obj = pin_find_named_pin(pin_cpu_pins, pin_name); if (pin_obj) { if (pin_map_obj.debug) { printf("Pin.cpu maps "); mp_obj_print(user_obj, PRINT_REPR); printf(" to "); mp_obj_print((mp_obj_t)pin_obj, PRINT_STR); printf("\n"); } return pin_obj; } nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "pin '%s' not a valid pin identifier", pin_name)); }
mp_obj_t mp_builtin___import__(size_t n_args, const mp_obj_t *args) { #if DEBUG_PRINT DEBUG_printf("__import__:\n"); for (size_t i = 0; i < n_args; i++) { DEBUG_printf(" "); mp_obj_print(args[i], PRINT_REPR); DEBUG_printf("\n"); } #endif mp_obj_t module_name = args[0]; mp_obj_t fromtuple = mp_const_none; mp_int_t level = 0; if (n_args >= 4) { fromtuple = args[3]; if (n_args >= 5) { level = MP_OBJ_SMALL_INT_VALUE(args[4]); if (level < 0) { mp_raise_ValueError(NULL); } } } size_t mod_len; const char *mod_str = mp_obj_str_get_data(module_name, &mod_len); if (level != 0) { // What we want to do here is to take name of current module, // chop <level> trailing components, and concatenate with passed-in // module name, thus resolving relative import name into absolute. // This even appears to be correct per // http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name // "Relative imports use a module's __name__ attribute to determine that // module's position in the package hierarchy." level--; mp_obj_t this_name_q = mp_obj_dict_get(MP_OBJ_FROM_PTR(mp_globals_get()), MP_OBJ_NEW_QSTR(MP_QSTR___name__)); assert(this_name_q != MP_OBJ_NULL); #if MICROPY_CPYTHON_COMPAT if (MP_OBJ_QSTR_VALUE(this_name_q) == MP_QSTR___main__) { // This is a module run by -m command-line switch, get its real name from backup attribute this_name_q = mp_obj_dict_get(MP_OBJ_FROM_PTR(mp_globals_get()), MP_OBJ_NEW_QSTR(MP_QSTR___main__)); } #endif mp_map_t *globals_map = &mp_globals_get()->map; mp_map_elem_t *elem = mp_map_lookup(globals_map, MP_OBJ_NEW_QSTR(MP_QSTR___path__), MP_MAP_LOOKUP); bool is_pkg = (elem != NULL); #if DEBUG_PRINT DEBUG_printf("Current module/package: "); mp_obj_print(this_name_q, PRINT_REPR); DEBUG_printf(", is_package: %d", is_pkg); DEBUG_printf("\n"); #endif size_t this_name_l; const char *this_name = mp_obj_str_get_data(this_name_q, &this_name_l); const char *p = this_name + this_name_l; if (!is_pkg) { // We have module, but relative imports are anchored at package, so // go there. chop_component(this_name, &p); } while (level--) { chop_component(this_name, &p); } // We must have some component left over to import from if (p == this_name) { mp_raise_ValueError("cannot perform relative import"); } uint new_mod_l = (mod_len == 0 ? (size_t)(p - this_name) : (size_t)(p - this_name) + 1 + mod_len); char *new_mod = mp_local_alloc(new_mod_l); memcpy(new_mod, this_name, p - this_name); if (mod_len != 0) { new_mod[p - this_name] = '.'; memcpy(new_mod + (p - this_name) + 1, mod_str, mod_len); } qstr new_mod_q = qstr_from_strn(new_mod, new_mod_l); mp_local_free(new_mod); DEBUG_printf("Resolved base name for relative import: '%s'\n", qstr_str(new_mod_q)); module_name = MP_OBJ_NEW_QSTR(new_mod_q); mod_str = qstr_str(new_mod_q); mod_len = new_mod_l; } // check if module already exists qstr module_name_qstr = mp_obj_str_get_qstr(module_name); mp_obj_t module_obj = mp_module_get(module_name_qstr); if (module_obj != MP_OBJ_NULL) { DEBUG_printf("Module already loaded\n"); // If it's not a package, return module right away char *p = strchr(mod_str, '.'); if (p == NULL) { return module_obj; } // If fromlist is not empty, return leaf module if (fromtuple != mp_const_none) { return module_obj; } // Otherwise, we need to return top-level package qstr pkg_name = qstr_from_strn(mod_str, p - mod_str); return mp_module_get(pkg_name); } DEBUG_printf("Module not yet loaded\n"); uint last = 0; VSTR_FIXED(path, MICROPY_ALLOC_PATH_MAX) module_obj = MP_OBJ_NULL; mp_obj_t top_module_obj = MP_OBJ_NULL; mp_obj_t outer_module_obj = MP_OBJ_NULL; uint i; for (i = 1; i <= mod_len; i++) { if (i == mod_len || mod_str[i] == '.') { // create a qstr for the module name up to this depth qstr mod_name = qstr_from_strn(mod_str, i); DEBUG_printf("Processing module: %s\n", qstr_str(mod_name)); DEBUG_printf("Previous path: =%.*s=\n", vstr_len(&path), vstr_str(&path)); // find the file corresponding to the module name mp_import_stat_t stat; if (vstr_len(&path) == 0) { // first module in the dotted-name; search for a directory or file stat = find_file(mod_str, i, &path); } else { // latter module in the dotted-name; append to path vstr_add_char(&path, PATH_SEP_CHAR); vstr_add_strn(&path, mod_str + last, i - last); stat = stat_dir_or_file(&path); } DEBUG_printf("Current path: %.*s\n", vstr_len(&path), vstr_str(&path)); if (stat == MP_IMPORT_STAT_NO_EXIST) { #if MICROPY_MODULE_WEAK_LINKS // check if there is a weak link to this module if (i == mod_len) { mp_map_elem_t *el = mp_map_lookup((mp_map_t*)&mp_builtin_module_weak_links_map, MP_OBJ_NEW_QSTR(mod_name), MP_MAP_LOOKUP); if (el == NULL) { goto no_exist; } // found weak linked module module_obj = el->value; mp_module_call_init(mod_name, module_obj); } else { no_exist: #else { #endif // couldn't find the file, so fail if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { mp_raise_msg(&mp_type_ImportError, "module not found"); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ImportError, "no module named '%q'", mod_name)); } } } else { // found the file, so get the module module_obj = mp_module_get(mod_name); } if (module_obj == MP_OBJ_NULL) { // module not already loaded, so load it! module_obj = mp_obj_new_module(mod_name); // if args[3] (fromtuple) has magic value False, set up // this module for command-line "-m" option (set module's // name to __main__ instead of real name). Do this only // for *modules* however - packages never have their names // replaced, instead they're -m'ed using a special __main__ // submodule in them. (This all apparently is done to not // touch package name itself, which is important for future // imports). if (i == mod_len && fromtuple == mp_const_false && stat != MP_IMPORT_STAT_DIR) { mp_obj_module_t *o = MP_OBJ_TO_PTR(module_obj); mp_obj_dict_store(MP_OBJ_FROM_PTR(o->globals), MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR___main__)); #if MICROPY_CPYTHON_COMPAT // Store module as "__main__" in the dictionary of loaded modules (returned by sys.modules). mp_obj_dict_store(MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_loaded_modules_dict)), MP_OBJ_NEW_QSTR(MP_QSTR___main__), module_obj); // Store real name in "__main__" attribute. Chosen semi-randonly, to reuse existing qstr's. mp_obj_dict_store(MP_OBJ_FROM_PTR(o->globals), MP_OBJ_NEW_QSTR(MP_QSTR___main__), MP_OBJ_NEW_QSTR(mod_name)); #endif } if (stat == MP_IMPORT_STAT_DIR) { 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; } }
// C API used to convert a user-supplied pin name into an ordinal pin number. const pin_obj_t *pin_find(mp_obj_t user_obj) { const pin_obj_t *pin_obj; // If a pin was provided, then use it if (mp_obj_is_type(user_obj, &pin_type)) { pin_obj = MP_OBJ_TO_PTR(user_obj); if (pin_class_debug) { printf("Pin map passed pin "); mp_obj_print(MP_OBJ_FROM_PTR(pin_obj), PRINT_STR); printf("\n"); } return pin_obj; } if (MP_STATE_PORT(pin_class_mapper) != mp_const_none) { mp_obj_t o = mp_call_function_1(MP_STATE_PORT(pin_class_mapper), user_obj); if (o != mp_const_none) { if (!mp_obj_is_type(o, &pin_type)) { mp_raise_ValueError("Pin.mapper didn't return a Pin object"); } if (pin_class_debug) { printf("Pin.mapper maps "); mp_obj_print(user_obj, PRINT_REPR); printf(" to "); mp_obj_print(o, PRINT_STR); printf("\n"); } return MP_OBJ_TO_PTR(o); } // The pin mapping function returned mp_const_none, fall through to // other lookup methods. } if (MP_STATE_PORT(pin_class_map_dict) != mp_const_none) { mp_map_t *pin_map_map = mp_obj_dict_get_map(MP_STATE_PORT(pin_class_map_dict)); mp_map_elem_t *elem = mp_map_lookup(pin_map_map, user_obj, MP_MAP_LOOKUP); if (elem != NULL && elem->value != MP_OBJ_NULL) { mp_obj_t o = elem->value; if (pin_class_debug) { printf("Pin.map_dict maps "); mp_obj_print(user_obj, PRINT_REPR); printf(" to "); mp_obj_print(o, PRINT_STR); printf("\n"); } return MP_OBJ_TO_PTR(o); } } // See if the pin name matches a board pin pin_obj = pin_find_named_pin(&pin_board_pins_locals_dict, user_obj); if (pin_obj) { if (pin_class_debug) { printf("Pin.board maps "); mp_obj_print(user_obj, PRINT_REPR); printf(" to "); mp_obj_print(MP_OBJ_FROM_PTR(pin_obj), PRINT_STR); printf("\n"); } return pin_obj; } // See if the pin name matches a cpu pin pin_obj = pin_find_named_pin(&pin_cpu_pins_locals_dict, user_obj); if (pin_obj) { if (pin_class_debug) { printf("Pin.cpu maps "); mp_obj_print(user_obj, PRINT_REPR); printf(" to "); mp_obj_print(MP_OBJ_FROM_PTR(pin_obj), PRINT_STR); printf("\n"); } return pin_obj; } nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Pin(%s) doesn't exist", mp_obj_str_get_str(user_obj))); }
STATIC mp_obj_t pyb_help(uint n_args, const mp_obj_t *args) { if (n_args == 0) { // print a general help message mp_printf(&mp_plat_print, "%s", help_text); } else { mp_obj_t args0 = args[0]; mp_obj_type_t *args0_type = mp_obj_get_type(args0); if (args0_type->name == MP_QSTR_bound_method) { args0 = ((mp_obj_t*)args0)[1]; // extract method args0_type = mp_obj_get_type(args0); } // see if we have specific help info for this instance for (size_t i = 0; i < MP_ARRAY_SIZE(help_table_instances); i++) { if (args0 == help_table_instances[i].obj) { mp_print_str(&mp_plat_print, help_table_instances[i].doc); //if (args0_type == &mp_type_module) { //TODO here we can list the things inside the module //} return mp_const_none; } } // see if we have specific help info for this type for (size_t i = 0; i < MP_ARRAY_SIZE(help_table_types); i++) { if (args0 == help_table_types[i].obj || args0_type == help_table_types[i].obj) { mp_print_str(&mp_plat_print, help_table_types[i].doc); return mp_const_none; } } // don't have specific help info, try instead to print something sensible mp_printf(&mp_plat_print, "object "); mp_obj_print(args0, PRINT_STR); mp_printf(&mp_plat_print, " is of type %q\n", args0_type->name); mp_map_t *map = NULL; if (args0_type == &mp_type_module) { map = mp_obj_dict_get_map(mp_obj_module_get_globals(args0)); } else { mp_obj_type_t *type; if (args0_type == &mp_type_type) { type = args0; } else { type = args0_type; } if (type->locals_dict != MP_OBJ_NULL && MP_OBJ_IS_TYPE(type->locals_dict, &mp_type_dict)) { map = mp_obj_dict_get_map(type->locals_dict); } } if (map != NULL) { for (uint i = 0; i < map->alloc; i++) { if (map->table[i].key != MP_OBJ_NULL) { pyb_help_print_info_about_object(map->table[i].key, map->table[i].value); } } } } return mp_const_none; }
mp_obj_t mp_builtin___import__(mp_uint_t n_args, const mp_obj_t *args) { #if DEBUG_PRINT DEBUG_printf("__import__:\n"); for (mp_uint_t i = 0; i < n_args; i++) { DEBUG_printf(" "); mp_obj_print(args[i], PRINT_REPR); DEBUG_printf("\n"); } #endif mp_obj_t module_name = args[0]; mp_obj_t fromtuple = mp_const_none; mp_int_t level = 0; if (n_args >= 4) { fromtuple = args[3]; if (n_args >= 5) { level = MP_OBJ_SMALL_INT_VALUE(args[4]); } } mp_uint_t mod_len; const char *mod_str = mp_obj_str_get_data(module_name, &mod_len); if (level != 0) { // What we want to do here is to take name of current module, // chop <level> trailing components, and concatenate with passed-in // module name, thus resolving relative import name into absolue. // This even appears to be correct per // http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name // "Relative imports use a module's __name__ attribute to determine that // module's position in the package hierarchy." level--; mp_obj_t this_name_q = mp_obj_dict_get(mp_globals_get(), MP_OBJ_NEW_QSTR(MP_QSTR___name__)); assert(this_name_q != MP_OBJ_NULL); #if MICROPY_CPYTHON_COMPAT if (MP_OBJ_QSTR_VALUE(this_name_q) == MP_QSTR___main__) { // This is a module run by -m command-line switch, get its real name from backup attribute this_name_q = mp_obj_dict_get(mp_globals_get(), MP_OBJ_NEW_QSTR(MP_QSTR___main__)); } #endif mp_map_t *globals_map = mp_obj_dict_get_map(mp_globals_get()); mp_map_elem_t *elem = mp_map_lookup(globals_map, MP_OBJ_NEW_QSTR(MP_QSTR___path__), MP_MAP_LOOKUP); bool is_pkg = (elem != NULL); #if DEBUG_PRINT DEBUG_printf("Current module/package: "); mp_obj_print(this_name_q, PRINT_REPR); DEBUG_printf(", is_package: %d", is_pkg); DEBUG_printf("\n"); #endif mp_uint_t this_name_l; const char *this_name = mp_obj_str_get_data(this_name_q, &this_name_l); const char *p = this_name + this_name_l; if (!is_pkg) { // We have module, but relative imports are anchored at package, so // go there. chop_component(this_name, &p); } uint dots_seen = 0; while (level--) { chop_component(this_name, &p); dots_seen++; } if (dots_seen == 0 && level >= 1) { // http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name // "If the module's name does not contain any package information // (e.g. it is set to '__main__') then relative imports are // resolved as if the module were a top level module, regardless // of where the module is actually located on the file system." // Supposedly this if catches this condition and resolve it properly // TODO: But nobody knows for sure. This condition happens when // package's __init__.py does something like "import .submod". So, // maybe we should check for package here? But quote above doesn't // talk about packages, it talks about dot-less module names. DEBUG_printf("Warning: no dots in current module name and level>0\n"); p = this_name + this_name_l; } else if (level != -1) { nlr_raise(mp_obj_new_exception_msg(&mp_type_ImportError, "Invalid relative import")); } uint new_mod_l = (mod_len == 0 ? (size_t)(p - this_name) : (size_t)(p - this_name) + 1 + mod_len); char *new_mod = alloca(new_mod_l); memcpy(new_mod, this_name, p - this_name); if (mod_len != 0) { new_mod[p - this_name] = '.'; memcpy(new_mod + (p - this_name) + 1, mod_str, mod_len); } qstr new_mod_q = qstr_from_strn(new_mod, new_mod_l); DEBUG_printf("Resolved base name for relative import: '%s'\n", qstr_str(new_mod_q)); if (new_mod_q == MP_QSTR_) { // CPython raises SystemError nlr_raise(mp_obj_new_exception_msg(&mp_type_ImportError, "cannot perform relative import")); } module_name = MP_OBJ_NEW_QSTR(new_mod_q); mod_str = new_mod; mod_len = new_mod_l; } // check if module already exists qstr module_name_qstr = mp_obj_str_get_qstr(module_name); mp_obj_t module_obj = mp_module_get(module_name_qstr); if (module_obj != MP_OBJ_NULL) { DEBUG_printf("Module already loaded\n"); // If it's not a package, return module right away char *p = strchr(mod_str, '.'); if (p == NULL) { return module_obj; } // If fromlist is not empty, return leaf module if (fromtuple != mp_const_none) { return module_obj; } // Otherwise, we need to return top-level package qstr pkg_name = qstr_from_strn(mod_str, p - mod_str); return mp_module_get(pkg_name); } DEBUG_printf("Module not yet loaded\n"); #if MICROPY_MODULE_FROZEN mp_lexer_t *lex = mp_find_frozen_module(mod_str, mod_len); if (lex != NULL) { module_obj = mp_obj_new_module(module_name_qstr); // if args[3] (fromtuple) has magic value False, set up // this module for command-line "-m" option (set module's // name to __main__ instead of real name). // TODO: Duplicated below too. if (fromtuple == mp_const_false) { mp_obj_module_t *o = module_obj; mp_obj_dict_store(o->globals, MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR___main__)); } do_load_from_lexer(module_obj, lex, mod_str); return module_obj; } #endif uint last = 0; VSTR_FIXED(path, MICROPY_ALLOC_PATH_MAX) module_obj = MP_OBJ_NULL; mp_obj_t top_module_obj = MP_OBJ_NULL; mp_obj_t outer_module_obj = MP_OBJ_NULL; uint i; for (i = 1; i <= mod_len; i++) { if (i == mod_len || mod_str[i] == '.') { // create a qstr for the module name up to this depth qstr mod_name = qstr_from_strn(mod_str, i); DEBUG_printf("Processing module: %s\n", qstr_str(mod_name)); DEBUG_printf("Previous path: =%.*s=\n", vstr_len(&path), vstr_str(&path)); // find the file corresponding to the module name mp_import_stat_t stat; if (vstr_len(&path) == 0) { // first module in the dotted-name; search for a directory or file stat = find_file(mod_str, i, &path); } else { // latter module in the dotted-name; append to path vstr_add_char(&path, PATH_SEP_CHAR); vstr_add_strn(&path, mod_str + last, i - last); stat = stat_dir_or_file(&path); } DEBUG_printf("Current path: %.*s\n", vstr_len(&path), vstr_str(&path)); if (stat == MP_IMPORT_STAT_NO_EXIST) { #if MICROPY_MODULE_WEAK_LINKS // check if there is a weak link to this module if (i == mod_len) { mp_map_elem_t *el = mp_map_lookup((mp_map_t*)&mp_builtin_module_weak_links_map, MP_OBJ_NEW_QSTR(mod_name), MP_MAP_LOOKUP); if (el == NULL) { goto no_exist; } // found weak linked module module_obj = el->value; } else { no_exist: #else { #endif // couldn't find the file, so fail if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) { nlr_raise(mp_obj_new_exception_msg(&mp_type_ImportError, "module not found")); } else { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ImportError, "no module named '%q'", mod_name)); } } } else { // found the file, so get the module module_obj = mp_module_get(mod_name); } if (module_obj == MP_OBJ_NULL) { // module not already loaded, so load it! module_obj = mp_obj_new_module(mod_name); // if args[3] (fromtuple) has magic value False, set up // this module for command-line "-m" option (set module's // name to __main__ instead of real name). if (i == mod_len && fromtuple == mp_const_false) { mp_obj_module_t *o = module_obj; mp_obj_dict_store(o->globals, MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR___main__)); #if MICROPY_CPYTHON_COMPAT // Store real name in "__main__" attribute. Choosen semi-randonly, to reuse existing qstr's. mp_obj_dict_store(o->globals, MP_OBJ_NEW_QSTR(MP_QSTR___main__), MP_OBJ_NEW_QSTR(mod_name)); #endif } if (stat == MP_IMPORT_STAT_DIR) { 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), false)); vstr_add_char(&path, PATH_SEP_CHAR); vstr_add_str(&path, "__init__.py"); if (mp_import_stat(vstr_null_terminated_str(&path)) != MP_IMPORT_STAT_FILE) { vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py mp_warning("%s is imported as namespace package", vstr_str(&path)); } else { do_load(module_obj, &path); vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py } } else { // MP_IMPORT_STAT_FILE do_load(module_obj, &path); // TODO: We cannot just break here, at the very least, we must execute // trailer code below. But otherwise if there're remaining components, // that would be (??) object path within module, not modules path within FS. // break; } } 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; } }
mp_obj_t mp_builtin___import__(uint n_args, mp_obj_t *args) { #if DEBUG_PRINT printf("__import__:\n"); for (int i = 0; i < n_args; i++) { printf(" "); mp_obj_print(args[i], PRINT_REPR); printf("\n"); } #endif mp_obj_t module_name = args[0]; mp_obj_t fromtuple = mp_const_none; int level = 0; if (n_args >= 4) { fromtuple = args[3]; if (n_args >= 5) { level = MP_OBJ_SMALL_INT_VALUE(args[4]); } } uint mod_len; const char *mod_str = (const char*)mp_obj_str_get_data(module_name, &mod_len); if (level != 0) { // What we want to do here is to take name of current module, // chop <level> trailing components, and concatenate with passed-in // module name, thus resolving relative import name into absolue. // This even appears to be correct per // http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name // "Relative imports use a module's __name__ attribute to determine that // module's position in the package hierarchy." mp_obj_t this_name_q = mp_obj_dict_get(mp_globals_get(), MP_OBJ_NEW_QSTR(MP_QSTR___name__)); assert(this_name_q != MP_OBJ_NULL); #if DEBUG_PRINT printf("Current module: "); mp_obj_print(this_name_q, PRINT_REPR); printf("\n"); #endif uint this_name_l; const char *this_name = (const char*)mp_obj_str_get_data(this_name_q, &this_name_l); uint dots_seen = 0; const char *p = this_name + this_name_l - 1; while (p > this_name) { if (*p == '.') { dots_seen++; if (--level == 0) { break; } } p--; } if (dots_seen == 0 && level == 1) { // http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name // "If the module's name does not contain any package information // (e.g. it is set to '__main__') then relative imports are // resolved as if the module were a top level module, regardless // of where the module is actually located on the file system." // Supposedly this if catches this condition and resolve it properly // TODO: But nobody knows for sure. This condition happens when // package's __init__.py does something like "import .submod". So, // maybe we should check for package here? But quote above doesn't // talk about packages, it talks about dot-less module names. p = this_name + this_name_l; } else if (level != 0) { nlr_raise(mp_obj_new_exception_msg(&mp_type_ImportError, "Invalid relative import")); } uint new_mod_l = (mod_len == 0 ? p - this_name : p - this_name + 1 + mod_len); char *new_mod = alloca(new_mod_l); memcpy(new_mod, this_name, p - this_name); if (mod_len != 0) { new_mod[p - this_name] = '.'; memcpy(new_mod + (p - this_name) + 1, mod_str, mod_len); } qstr new_mod_q = qstr_from_strn(new_mod, new_mod_l); DEBUG_printf("Resolved relative name: %s\n", qstr_str(new_mod_q)); module_name = MP_OBJ_NEW_QSTR(new_mod_q); mod_str = new_mod; mod_len = new_mod_l; } // check if module already exists mp_obj_t module_obj = mp_module_get(mp_obj_str_get_qstr(module_name)); if (module_obj != MP_OBJ_NULL) { DEBUG_printf("Module already loaded\n"); // If it's not a package, return module right away char *p = strchr(mod_str, '.'); if (p == NULL) { return module_obj; } // If fromlist is not empty, return leaf module if (fromtuple != mp_const_none) { return module_obj; } // Otherwise, we need to return top-level package qstr pkg_name = qstr_from_strn(mod_str, p - mod_str); return mp_module_get(pkg_name); } DEBUG_printf("Module not yet loaded\n"); uint last = 0; VSTR_FIXED(path, MICROPY_ALLOC_PATH_MAX) module_obj = MP_OBJ_NULL; mp_obj_t top_module_obj = MP_OBJ_NULL; mp_obj_t outer_module_obj = MP_OBJ_NULL; uint i; for (i = 1; i <= mod_len; i++) { if (i == mod_len || mod_str[i] == '.') { // create a qstr for the module name up to this depth qstr mod_name = qstr_from_strn(mod_str, i); DEBUG_printf("Processing module: %s\n", qstr_str(mod_name)); DEBUG_printf("Previous path: %s\n", vstr_str(&path)); // find the file corresponding to the module name mp_import_stat_t stat; if (vstr_len(&path) == 0) { // first module in the dotted-name; search for a directory or file stat = find_file(mod_str, i, &path); } else { // latter module in the dotted-name; append to path vstr_add_char(&path, PATH_SEP_CHAR); vstr_add_strn(&path, mod_str + last, i - last); stat = stat_dir_or_file(&path); } DEBUG_printf("Current path: %s\n", vstr_str(&path)); // fail if we couldn't find the file if (stat == MP_IMPORT_STAT_NO_EXIST) { nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ImportError, "No module named '%s'", qstr_str(mod_name))); } module_obj = mp_module_get(mod_name); if (module_obj == MP_OBJ_NULL) { // module not already loaded, so load it! module_obj = mp_obj_new_module(mod_name); if (stat == MP_IMPORT_STAT_DIR) { DEBUG_printf("%s is dir\n", 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), false)); vstr_add_char(&path, PATH_SEP_CHAR); vstr_add_str(&path, "__init__.py"); if (mp_import_stat(vstr_str(&path)) != MP_IMPORT_STAT_FILE) { vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py printf("Notice: %s is imported as namespace package\n", vstr_str(&path)); } else { do_load(module_obj, &path); vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py } } else { // MP_IMPORT_STAT_FILE do_load(module_obj, &path); // TODO: We cannot just break here, at the very least, we must execute // trailer code below. But otherwise if there're remaining components, // that would be (??) object path within module, not modules path within FS. // break; } } 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 (i < mod_len) { // we loaded a package, now need to load objects from within that package // TODO assert(0); } // 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; }