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#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "lexer.h"
#include "lexerunix.h"
#include "parse.h"
#include "obj.h"
#include "compile.h"
#include "runtime0.h"
#include "runtime.h"
#include "map.h"
#include "builtin.h"
mp_obj_t sys_path;
mp_obj_t mp_builtin___import__(int n_args, mp_obj_t *args) {
/*
printf("import:\n");
for (int i = 0; i < n; i++) {
printf(" ");
mp_obj_print(args[i]);
printf("\n");
}
*/
qstr mod_name = mp_obj_str_get_qstr(args[0]);
mp_obj_t loaded = mp_obj_module_get(mod_name);
if (loaded != MP_OBJ_NULL) {
return loaded;
}
// find the file to import
uint mod_name_len;
const byte* mod_name_p = qstr_data(mod_name, &mod_name_len);
mp_lexer_t *lex = NULL;
uint path_num = 0;
mp_obj_t *path_items;
if (sys_path != MP_OBJ_NULL) {
mp_obj_list_get(sys_path, &path_num, &path_items);
}
if (path_num == 0) {
CHECKBUF(fname, PATH_MAX);
CHECKBUF_APPEND(fname, mod_name_p, mod_name_len);
CHECKBUF_APPEND(fname, ".py", sizeof(".py") - 1);
CHECKBUF_APPEND_0(fname);
lex = mp_lexer_new_from_file(fname);
} else {
for (int i = 0; i < path_num; i++) {
CHECKBUF(fname, PATH_MAX);
uint p_len;
const byte *p = mp_obj_str_get_data(path_items[i], &p_len);
if (p_len > 0) {
CHECKBUF_APPEND(fname, p, p_len);
CHECKBUF_APPEND(fname, "/", 1);
}
CHECKBUF_APPEND(fname, mod_name_p, mod_name_len);
CHECKBUF_APPEND(fname, ".py", sizeof(".py") - 1);
CHECKBUF_APPEND_0(fname);
lex = mp_lexer_new_from_file(fname);
if (lex != NULL) {
break;
}
}
}
if (lex == NULL) {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_ImportError, "ImportError: No module named '%s'", mod_name_p));
}
qstr source_name = mp_lexer_source_name(lex);
// create a new module object
mp_obj_t module_obj = mp_obj_new_module(mod_name);
// save the old context
mp_map_t *old_locals = rt_locals_get();
mp_map_t *old_globals = rt_globals_get();
// set the new context
rt_locals_set(mp_obj_module_get_globals(module_obj));
rt_globals_set(mp_obj_module_get_globals(module_obj));
// parse the imported script
qstr parse_exc_id;
const char *parse_exc_msg;
mp_parse_node_t pn = mp_parse(lex, MP_PARSE_FILE_INPUT, &parse_exc_id, &parse_exc_msg);
mp_lexer_free(lex);
if (pn == MP_PARSE_NODE_NULL) {
// parse error; clean up and raise exception
rt_locals_set(old_locals);
rt_globals_set(old_globals);
nlr_jump(mp_obj_new_exception_msg(parse_exc_id, parse_exc_msg));
}
// compile the imported script
mp_obj_t module_fun = mp_compile(pn, source_name, false);
mp_parse_node_free(pn);
if (module_fun == mp_const_none) {
// TODO handle compile error correctly
rt_locals_set(old_locals);
rt_globals_set(old_globals);
return mp_const_none;
}
// complied successfully, execute it
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
rt_call_function_0(module_fun);
nlr_pop();
} else {
// exception; restore context and re-raise same exception
rt_locals_set(old_locals);
rt_globals_set(old_globals);
nlr_jump(nlr.ret_val);
}
rt_locals_set(old_locals);
rt_globals_set(old_globals);
return module_obj;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin___import___obj, 1, 5, mp_builtin___import__);
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