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circuitpython/py/runtime.c
Jim Mussared 525557738c py/builtinimport: Optimise sub-package loading. 
This makes it so that sub-packages are resolved relative to their parent's
`__path__`, rather than re-resolving each parent's filesystem path.

The previous behavior was that `import foo.bar` would first re-search
`sys.path` for `foo`, then use the resulting path to find `bar`.

For already-loaded and u-prefixed modules, because we no longer need to
build the path from level to level, we no longer unnecessarily search
the filesystem. This should improve startup time.

Explicitly makes the resolving process clear:
 - Loaded modules are returned immediately without touching the filesystem.
 - Exact-match of builtins are also returned immediately.
 - Then the filesystem search happens.
 - If that fails, then the weak-link handling is applied.

This maintains the existing behavior: if a user writes `import time` they
will get time.py if it exits, otherwise the built-in utime. Whereas `import
utime` will always return the built-in.

This also fixes a regression from a7fa18c203
where we search the filesystem for built-ins. It is now only possible to
override u-prefixed builtins. This will remove a lot of filesystem stats
at startup, as micropython-specific modules (e.g. `pyb`) will no longer
attempt to look at the filesystem.

Added several improvements to the comments and some minor renaming and
refactoring to make it clearer how the import mechanism works. Overall
code size diff is +56 bytes on STM32.

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
2023-06-01 16:21:21 +10:00

1723 lines
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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2014-2018 Paul Sokolovsky
*
* 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 <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "py/parsenum.h"
#include "py/compile.h"
#include "py/objstr.h"
#include "py/objtuple.h"
#include "py/objlist.h"
#include "py/objtype.h"
#include "py/objmodule.h"
#include "py/objgenerator.h"
#include "py/smallint.h"
#include "py/runtime.h"
#include "py/builtin.h"
#include "py/stackctrl.h"
#include "py/gc.h"
#if MICROPY_DEBUG_VERBOSE // print debugging info
#define DEBUG_PRINT (1)
#define DEBUG_printf DEBUG_printf
#define DEBUG_OP_printf(...) DEBUG_printf(__VA_ARGS__)
#else // don't print debugging info
#define DEBUG_printf(...) (void)0
#define DEBUG_OP_printf(...) (void)0
#endif
const mp_obj_module_t mp_module___main__ = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&MP_STATE_VM(dict_main),
};
MP_REGISTER_MODULE(MP_QSTR___main__, mp_module___main__);
#define TYPE_HAS_ITERNEXT(type) (type->flags & (MP_TYPE_FLAG_ITER_IS_ITERNEXT | MP_TYPE_FLAG_ITER_IS_CUSTOM | MP_TYPE_FLAG_ITER_IS_STREAM))
void mp_init(void) {
qstr_init();
// no pending exceptions to start with
MP_STATE_THREAD(mp_pending_exception) = MP_OBJ_NULL;
#if MICROPY_ENABLE_SCHEDULER
#if MICROPY_SCHEDULER_STATIC_NODES
if (MP_STATE_VM(sched_head) == NULL) {
// no pending callbacks to start with
MP_STATE_VM(sched_state) = MP_SCHED_IDLE;
} else {
// pending callbacks are on the list, eg from before a soft reset
MP_STATE_VM(sched_state) = MP_SCHED_PENDING;
}
#endif
MP_STATE_VM(sched_idx) = 0;
MP_STATE_VM(sched_len) = 0;
#endif
#if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
mp_init_emergency_exception_buf();
#endif
#if MICROPY_KBD_EXCEPTION
// initialise the exception object for raising KeyboardInterrupt
MP_STATE_VM(mp_kbd_exception).base.type = &mp_type_KeyboardInterrupt;
MP_STATE_VM(mp_kbd_exception).traceback_alloc = 0;
MP_STATE_VM(mp_kbd_exception).traceback_len = 0;
MP_STATE_VM(mp_kbd_exception).traceback_data = NULL;
MP_STATE_VM(mp_kbd_exception).args = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj;
#endif
#if MICROPY_ENABLE_COMPILER
// optimization disabled by default
MP_STATE_VM(mp_optimise_value) = 0;
#if MICROPY_EMIT_NATIVE
MP_STATE_VM(default_emit_opt) = MP_EMIT_OPT_NONE;
#endif
#endif
// init global module dict
mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), MICROPY_LOADED_MODULES_DICT_SIZE);
// initialise the __main__ module
mp_obj_dict_init(&MP_STATE_VM(dict_main), 1);
mp_obj_dict_store(MP_OBJ_FROM_PTR(&MP_STATE_VM(dict_main)), MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR___main__));
// locals = globals for outer module (see Objects/frameobject.c/PyFrame_New())
mp_locals_set(&MP_STATE_VM(dict_main));
mp_globals_set(&MP_STATE_VM(dict_main));
#if MICROPY_CAN_OVERRIDE_BUILTINS
// start with no extensions to builtins
MP_STATE_VM(mp_module_builtins_override_dict) = NULL;
#endif
#if MICROPY_PERSISTENT_CODE_TRACK_RELOC_CODE
MP_STATE_VM(track_reloc_code_list) = MP_OBJ_NULL;
#endif
#if MICROPY_PY_OS_DUPTERM
for (size_t i = 0; i < MICROPY_PY_OS_DUPTERM; ++i) {
MP_STATE_VM(dupterm_objs[i]) = MP_OBJ_NULL;
}
#endif
#if MICROPY_VFS
// initialise the VFS sub-system
MP_STATE_VM(vfs_cur) = NULL;
MP_STATE_VM(vfs_mount_table) = NULL;
#endif
#if MICROPY_PY_SYS_PATH_ARGV_DEFAULTS
mp_obj_list_init(MP_OBJ_TO_PTR(mp_sys_path), 0);
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_)); // current dir (or base dir of the script)
#if MICROPY_MODULE_FROZEN
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__dot_frozen));
#endif
mp_obj_list_init(MP_OBJ_TO_PTR(mp_sys_argv), 0);
#endif
#if MICROPY_PY_SYS_ATEXIT
MP_STATE_VM(sys_exitfunc) = mp_const_none;
#endif
#if MICROPY_PY_SYS_PS1_PS2
MP_STATE_VM(sys_mutable[MP_SYS_MUTABLE_PS1]) = MP_OBJ_NEW_QSTR(MP_QSTR__gt__gt__gt__space_);
MP_STATE_VM(sys_mutable[MP_SYS_MUTABLE_PS2]) = MP_OBJ_NEW_QSTR(MP_QSTR__dot__dot__dot__space_);
#endif
#if MICROPY_PY_SYS_SETTRACE
MP_STATE_THREAD(prof_trace_callback) = MP_OBJ_NULL;
MP_STATE_THREAD(prof_callback_is_executing) = false;
MP_STATE_THREAD(current_code_state) = NULL;
#endif
#if MICROPY_PY_SYS_TRACEBACKLIMIT
MP_STATE_VM(sys_mutable[MP_SYS_MUTABLE_TRACEBACKLIMIT]) = MP_OBJ_NEW_SMALL_INT(1000);
#endif
#if MICROPY_PY_BLUETOOTH
MP_STATE_VM(bluetooth) = MP_OBJ_NULL;
#endif
#if MICROPY_PY_THREAD_GIL
mp_thread_mutex_init(&MP_STATE_VM(gil_mutex));
#endif
// call port specific initialization if any
#ifdef MICROPY_PORT_INIT_FUNC
MICROPY_PORT_INIT_FUNC;
#endif
MP_THREAD_GIL_ENTER();
}
void mp_deinit(void) {
MP_THREAD_GIL_EXIT();
// call port specific deinitialization if any
#ifdef MICROPY_PORT_DEINIT_FUNC
MICROPY_PORT_DEINIT_FUNC;
#endif
}
mp_obj_t MICROPY_WRAP_MP_LOAD_NAME(mp_load_name)(qstr qst) {
// logic: search locals, globals, builtins
DEBUG_OP_printf("load name %s\n", qstr_str(qst));
// If we're at the outer scope (locals == globals), dispatch to load_global right away
if (mp_locals_get() != mp_globals_get()) {
mp_map_elem_t *elem = mp_map_lookup(&mp_locals_get()->map, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP);
if (elem != NULL) {
return elem->value;
}
}
return mp_load_global(qst);
}
mp_obj_t MICROPY_WRAP_MP_LOAD_GLOBAL(mp_load_global)(qstr qst) {
// logic: search globals, builtins
DEBUG_OP_printf("load global %s\n", qstr_str(qst));
mp_map_elem_t *elem = mp_map_lookup(&mp_globals_get()->map, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP);
if (elem == NULL) {
#if MICROPY_CAN_OVERRIDE_BUILTINS
if (MP_STATE_VM(mp_module_builtins_override_dict) != NULL) {
// lookup in additional dynamic table of builtins first
elem = mp_map_lookup(&MP_STATE_VM(mp_module_builtins_override_dict)->map, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP);
if (elem != NULL) {
return elem->value;
}
}
#endif
elem = mp_map_lookup((mp_map_t *)&mp_module_builtins_globals.map, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP);
if (elem == NULL) {
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_msg(&mp_type_NameError, MP_ERROR_TEXT("name not defined"));
#else
mp_raise_msg_varg(&mp_type_NameError, MP_ERROR_TEXT("name '%q' isn't defined"), qst);
#endif
}
}
return elem->value;
}
mp_obj_t mp_load_build_class(void) {
DEBUG_OP_printf("load_build_class\n");
#if MICROPY_CAN_OVERRIDE_BUILTINS
if (MP_STATE_VM(mp_module_builtins_override_dict) != NULL) {
// lookup in additional dynamic table of builtins first
mp_map_elem_t *elem = mp_map_lookup(&MP_STATE_VM(mp_module_builtins_override_dict)->map, MP_OBJ_NEW_QSTR(MP_QSTR___build_class__), MP_MAP_LOOKUP);
if (elem != NULL) {
return elem->value;
}
}
#endif
return MP_OBJ_FROM_PTR(&mp_builtin___build_class___obj);
}
void mp_store_name(qstr qst, mp_obj_t obj) {
DEBUG_OP_printf("store name %s <- %p\n", qstr_str(qst), obj);
mp_obj_dict_store(MP_OBJ_FROM_PTR(mp_locals_get()), MP_OBJ_NEW_QSTR(qst), obj);
}
void mp_delete_name(qstr qst) {
DEBUG_OP_printf("delete name %s\n", qstr_str(qst));
// TODO convert KeyError to NameError if qst not found
mp_obj_dict_delete(MP_OBJ_FROM_PTR(mp_locals_get()), MP_OBJ_NEW_QSTR(qst));
}
void mp_store_global(qstr qst, mp_obj_t obj) {
DEBUG_OP_printf("store global %s <- %p\n", qstr_str(qst), obj);
mp_obj_dict_store(MP_OBJ_FROM_PTR(mp_globals_get()), MP_OBJ_NEW_QSTR(qst), obj);
}
void mp_delete_global(qstr qst) {
DEBUG_OP_printf("delete global %s\n", qstr_str(qst));
// TODO convert KeyError to NameError if qst not found
mp_obj_dict_delete(MP_OBJ_FROM_PTR(mp_globals_get()), MP_OBJ_NEW_QSTR(qst));
}
mp_obj_t mp_unary_op(mp_unary_op_t op, mp_obj_t arg) {
DEBUG_OP_printf("unary " UINT_FMT " %q %p\n", op, mp_unary_op_method_name[op], arg);
if (op == MP_UNARY_OP_NOT) {
// "not x" is the negative of whether "x" is true per Python semantics
return mp_obj_new_bool(mp_obj_is_true(arg) == 0);
} else if (mp_obj_is_small_int(arg)) {
mp_int_t val = MP_OBJ_SMALL_INT_VALUE(arg);
switch (op) {
case MP_UNARY_OP_BOOL:
return mp_obj_new_bool(val != 0);
case MP_UNARY_OP_HASH:
return arg;
case MP_UNARY_OP_POSITIVE:
case MP_UNARY_OP_INT_MAYBE:
return arg;
case MP_UNARY_OP_NEGATIVE:
// check for overflow
if (val == MP_SMALL_INT_MIN) {
return mp_obj_new_int(-val);
} else {
return MP_OBJ_NEW_SMALL_INT(-val);
}
case MP_UNARY_OP_ABS:
if (val >= 0) {
return arg;
} else if (val == MP_SMALL_INT_MIN) {
// check for overflow
return mp_obj_new_int(-val);
} else {
return MP_OBJ_NEW_SMALL_INT(-val);
}
default:
assert(op == MP_UNARY_OP_INVERT);
return MP_OBJ_NEW_SMALL_INT(~val);
}
} else if (op == MP_UNARY_OP_HASH && mp_obj_is_str_or_bytes(arg)) {
// fast path for hashing str/bytes
GET_STR_HASH(arg, h);
if (h == 0) {
GET_STR_DATA_LEN(arg, data, len);
h = qstr_compute_hash(data, len);
}
return MP_OBJ_NEW_SMALL_INT(h);
} else {
const mp_obj_type_t *type = mp_obj_get_type(arg);
if (MP_OBJ_TYPE_HAS_SLOT(type, unary_op)) {
mp_obj_t result = MP_OBJ_TYPE_GET_SLOT(type, unary_op)(op, arg);
if (result != MP_OBJ_NULL) {
return result;
}
} else if (op == MP_UNARY_OP_HASH) {
// Type doesn't have unary_op so use hash of object instance.
return MP_OBJ_NEW_SMALL_INT((mp_uint_t)arg);
}
if (op == MP_UNARY_OP_BOOL) {
// Type doesn't have unary_op (or didn't handle MP_UNARY_OP_BOOL),
// so is implicitly True as this code path is impossible to reach
// if arg==mp_const_none.
return mp_const_true;
}
if (op == MP_UNARY_OP_INT_MAYBE
#if MICROPY_PY_BUILTINS_FLOAT
|| op == MP_UNARY_OP_FLOAT_MAYBE
#if MICROPY_PY_BUILTINS_COMPLEX
|| op == MP_UNARY_OP_COMPLEX_MAYBE
#endif
#endif
) {
// These operators may return MP_OBJ_NULL if they are not supported by the type.
return MP_OBJ_NULL;
}
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_TypeError(MP_ERROR_TEXT("unsupported type for operator"));
#else
mp_raise_msg_varg(&mp_type_TypeError,
MP_ERROR_TEXT("unsupported type for %q: '%s'"),
mp_unary_op_method_name[op], mp_obj_get_type_str(arg));
#endif
}
}
mp_obj_t MICROPY_WRAP_MP_BINARY_OP(mp_binary_op)(mp_binary_op_t op, mp_obj_t lhs, mp_obj_t rhs) {
DEBUG_OP_printf("binary " UINT_FMT " %q %p %p\n", op, mp_binary_op_method_name[op], lhs, rhs);
// TODO correctly distinguish inplace operators for mutable objects
// lookup logic that CPython uses for +=:
// check for implemented +=
// then check for implemented +
// then check for implemented seq.inplace_concat
// then check for implemented seq.concat
// then fail
// note that list does not implement + or +=, so that inplace_concat is reached first for +=
// deal with is
if (op == MP_BINARY_OP_IS) {
return mp_obj_new_bool(lhs == rhs);
}
// deal with == and != for all types
if (op == MP_BINARY_OP_EQUAL || op == MP_BINARY_OP_NOT_EQUAL) {
// mp_obj_equal_not_equal supports a bunch of shortcuts
return mp_obj_equal_not_equal(op, lhs, rhs);
}
// deal with exception_match for all types
if (op == MP_BINARY_OP_EXCEPTION_MATCH) {
// rhs must be issubclass(rhs, BaseException)
if (mp_obj_is_exception_type(rhs)) {
if (mp_obj_exception_match(lhs, rhs)) {
return mp_const_true;
} else {
return mp_const_false;
}
} else if (mp_obj_is_type(rhs, &mp_type_tuple)) {
mp_obj_tuple_t *tuple = MP_OBJ_TO_PTR(rhs);
for (size_t i = 0; i < tuple->len; i++) {
rhs = tuple->items[i];
if (!mp_obj_is_exception_type(rhs)) {
goto unsupported_op;
}
if (mp_obj_exception_match(lhs, rhs)) {
return mp_const_true;
}
}
return mp_const_false;
}
goto unsupported_op;
}
if (mp_obj_is_small_int(lhs)) {
mp_int_t lhs_val = MP_OBJ_SMALL_INT_VALUE(lhs);
if (mp_obj_is_small_int(rhs)) {
mp_int_t rhs_val = MP_OBJ_SMALL_INT_VALUE(rhs);
// This is a binary operation: lhs_val op rhs_val
// We need to be careful to handle overflow; see CERT INT32-C
// Operations that can overflow:
// + result always fits in mp_int_t, then handled by SMALL_INT check
// - result always fits in mp_int_t, then handled by SMALL_INT check
// * checked explicitly
// / if lhs=MIN and rhs=-1; result always fits in mp_int_t, then handled by SMALL_INT check
// % if lhs=MIN and rhs=-1; result always fits in mp_int_t, then handled by SMALL_INT check
// << checked explicitly
switch (op) {
case MP_BINARY_OP_OR:
case MP_BINARY_OP_INPLACE_OR:
lhs_val |= rhs_val;
break;
case MP_BINARY_OP_XOR:
case MP_BINARY_OP_INPLACE_XOR:
lhs_val ^= rhs_val;
break;
case MP_BINARY_OP_AND:
case MP_BINARY_OP_INPLACE_AND:
lhs_val &= rhs_val;
break;
case MP_BINARY_OP_LSHIFT:
case MP_BINARY_OP_INPLACE_LSHIFT: {
if (rhs_val < 0) {
// negative shift not allowed
mp_raise_ValueError(MP_ERROR_TEXT("negative shift count"));
} else if (rhs_val >= (mp_int_t)(sizeof(lhs_val) * MP_BITS_PER_BYTE)
|| lhs_val > (MP_SMALL_INT_MAX >> rhs_val)
|| lhs_val < (MP_SMALL_INT_MIN >> rhs_val)) {
// left-shift will overflow, so use higher precision integer
lhs = mp_obj_new_int_from_ll(lhs_val);
goto generic_binary_op;
} else {
// use standard precision
lhs_val = (mp_uint_t)lhs_val << rhs_val;
}
break;
}
case MP_BINARY_OP_RSHIFT:
case MP_BINARY_OP_INPLACE_RSHIFT:
if (rhs_val < 0) {
// negative shift not allowed
mp_raise_ValueError(MP_ERROR_TEXT("negative shift count"));
} else {
// standard precision is enough for right-shift
if (rhs_val >= (mp_int_t)(sizeof(lhs_val) * MP_BITS_PER_BYTE)) {
// Shifting to big amounts is undefined behavior
// in C and is CPU-dependent; propagate sign bit.
rhs_val = sizeof(lhs_val) * MP_BITS_PER_BYTE - 1;
}
lhs_val >>= rhs_val;
}
break;
case MP_BINARY_OP_ADD:
case MP_BINARY_OP_INPLACE_ADD:
lhs_val += rhs_val;
break;
case MP_BINARY_OP_SUBTRACT:
case MP_BINARY_OP_INPLACE_SUBTRACT:
lhs_val -= rhs_val;
break;
case MP_BINARY_OP_MULTIPLY:
case MP_BINARY_OP_INPLACE_MULTIPLY: {
// If long long type exists and is larger than mp_int_t, then
// we can use the following code to perform overflow-checked multiplication.
// Otherwise (eg in x64 case) we must use mp_small_int_mul_overflow.
#if 0
// compute result using long long precision
long long res = (long long)lhs_val * (long long)rhs_val;
if (res > MP_SMALL_INT_MAX || res < MP_SMALL_INT_MIN) {
// result overflowed SMALL_INT, so return higher precision integer
return mp_obj_new_int_from_ll(res);
} else {
// use standard precision
lhs_val = (mp_int_t)res;
}
#endif
if (mp_small_int_mul_overflow(lhs_val, rhs_val)) {
// use higher precision
lhs = mp_obj_new_int_from_ll(lhs_val);
goto generic_binary_op;
} else {
// use standard precision
return MP_OBJ_NEW_SMALL_INT(lhs_val * rhs_val);
}
}
case MP_BINARY_OP_FLOOR_DIVIDE:
case MP_BINARY_OP_INPLACE_FLOOR_DIVIDE:
if (rhs_val == 0) {
goto zero_division;
}
lhs_val = mp_small_int_floor_divide(lhs_val, rhs_val);
break;
#if MICROPY_PY_BUILTINS_FLOAT
case MP_BINARY_OP_TRUE_DIVIDE:
case MP_BINARY_OP_INPLACE_TRUE_DIVIDE:
if (rhs_val == 0) {
goto zero_division;
}
return mp_obj_new_float((mp_float_t)lhs_val / (mp_float_t)rhs_val);
#endif
case MP_BINARY_OP_MODULO:
case MP_BINARY_OP_INPLACE_MODULO: {
if (rhs_val == 0) {
goto zero_division;
}
lhs_val = mp_small_int_modulo(lhs_val, rhs_val);
break;
}
case MP_BINARY_OP_POWER:
case MP_BINARY_OP_INPLACE_POWER:
if (rhs_val < 0) {
#if MICROPY_PY_BUILTINS_FLOAT
return mp_obj_float_binary_op(op, (mp_float_t)lhs_val, rhs);
#else
mp_raise_ValueError(MP_ERROR_TEXT("negative power with no float support"));
#endif
} else {
mp_int_t ans = 1;
while (rhs_val > 0) {
if (rhs_val & 1) {
if (mp_small_int_mul_overflow(ans, lhs_val)) {
goto power_overflow;
}
ans *= lhs_val;
}
if (rhs_val == 1) {
break;
}
rhs_val /= 2;
if (mp_small_int_mul_overflow(lhs_val, lhs_val)) {
goto power_overflow;
}
lhs_val *= lhs_val;
}
lhs_val = ans;
}
break;
power_overflow:
// use higher precision
lhs = mp_obj_new_int_from_ll(MP_OBJ_SMALL_INT_VALUE(lhs));
goto generic_binary_op;
case MP_BINARY_OP_DIVMOD: {
if (rhs_val == 0) {
goto zero_division;
}
// to reduce stack usage we don't pass a temp array of the 2 items
mp_obj_tuple_t *tuple = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL));
tuple->items[0] = MP_OBJ_NEW_SMALL_INT(mp_small_int_floor_divide(lhs_val, rhs_val));
tuple->items[1] = MP_OBJ_NEW_SMALL_INT(mp_small_int_modulo(lhs_val, rhs_val));
return MP_OBJ_FROM_PTR(tuple);
}
case MP_BINARY_OP_LESS:
return mp_obj_new_bool(lhs_val < rhs_val);
case MP_BINARY_OP_MORE:
return mp_obj_new_bool(lhs_val > rhs_val);
case MP_BINARY_OP_LESS_EQUAL:
return mp_obj_new_bool(lhs_val <= rhs_val);
case MP_BINARY_OP_MORE_EQUAL:
return mp_obj_new_bool(lhs_val >= rhs_val);
default:
goto unsupported_op;
}
// This is an inlined version of mp_obj_new_int, for speed
if (MP_SMALL_INT_FITS(lhs_val)) {
return MP_OBJ_NEW_SMALL_INT(lhs_val);
} else {
return mp_obj_new_int_from_ll(lhs_val);
}
#if MICROPY_PY_BUILTINS_FLOAT
} else if (mp_obj_is_float(rhs)) {
mp_obj_t res = mp_obj_float_binary_op(op, (mp_float_t)lhs_val, rhs);
if (res == MP_OBJ_NULL) {
goto unsupported_op;
} else {
return res;
}
#endif
#if MICROPY_PY_BUILTINS_COMPLEX
} else if (mp_obj_is_type(rhs, &mp_type_complex)) {
mp_obj_t res = mp_obj_complex_binary_op(op, (mp_float_t)lhs_val, 0, rhs);
if (res == MP_OBJ_NULL) {
goto unsupported_op;
} else {
return res;
}
#endif
}
}
// Convert MP_BINARY_OP_IN to MP_BINARY_OP_CONTAINS with swapped args.
if (op == MP_BINARY_OP_IN) {
op = MP_BINARY_OP_CONTAINS;
mp_obj_t temp = lhs;
lhs = rhs;
rhs = temp;
}
// generic binary_op supplied by type
const mp_obj_type_t *type;
generic_binary_op:
type = mp_obj_get_type(lhs);
if (MP_OBJ_TYPE_HAS_SLOT(type, binary_op)) {
mp_obj_t result = MP_OBJ_TYPE_GET_SLOT(type, binary_op)(op, lhs, rhs);
if (result != MP_OBJ_NULL) {
return result;
}
}
// If this was an inplace method, fallback to the corresponding normal method.
// https://docs.python.org/3/reference/datamodel.html#object.__iadd__ :
// "If a specific method is not defined, the augmented assignment falls back
// to the normal methods."
if (op >= MP_BINARY_OP_INPLACE_OR && op <= MP_BINARY_OP_INPLACE_POWER) {
op += MP_BINARY_OP_OR - MP_BINARY_OP_INPLACE_OR;
goto generic_binary_op;
}
#if MICROPY_PY_REVERSE_SPECIAL_METHODS
if (op >= MP_BINARY_OP_OR && op <= MP_BINARY_OP_POWER) {
mp_obj_t t = rhs;
rhs = lhs;
lhs = t;
op += MP_BINARY_OP_REVERSE_OR - MP_BINARY_OP_OR;
goto generic_binary_op;
} else if (op >= MP_BINARY_OP_REVERSE_OR) {
// Convert __rop__ back to __op__ for error message
mp_obj_t t = rhs;
rhs = lhs;
lhs = t;
op -= MP_BINARY_OP_REVERSE_OR - MP_BINARY_OP_OR;
}
#endif
if (op == MP_BINARY_OP_CONTAINS) {
// If type didn't support containment then explicitly walk the iterator.
// mp_getiter will raise the appropriate exception if lhs is not iterable.
mp_obj_iter_buf_t iter_buf;
mp_obj_t iter = mp_getiter(lhs, &iter_buf);
mp_obj_t next;
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
if (mp_obj_equal(next, rhs)) {
return mp_const_true;
}
}
return mp_const_false;
}
unsupported_op:
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_TypeError(MP_ERROR_TEXT("unsupported type for operator"));
#else
mp_raise_msg_varg(&mp_type_TypeError,
MP_ERROR_TEXT("unsupported types for %q: '%s', '%s'"),
mp_binary_op_method_name[op], mp_obj_get_type_str(lhs), mp_obj_get_type_str(rhs));
#endif
zero_division:
mp_raise_msg(&mp_type_ZeroDivisionError, MP_ERROR_TEXT("divide by zero"));
}
mp_obj_t mp_call_function_0(mp_obj_t fun) {
return mp_call_function_n_kw(fun, 0, 0, NULL);
}
mp_obj_t mp_call_function_1(mp_obj_t fun, mp_obj_t arg) {
return mp_call_function_n_kw(fun, 1, 0, &arg);
}
mp_obj_t mp_call_function_2(mp_obj_t fun, mp_obj_t arg1, mp_obj_t arg2) {
mp_obj_t args[2];
args[0] = arg1;
args[1] = arg2;
return mp_call_function_n_kw(fun, 2, 0, args);
}
// args contains, eg: arg0 arg1 key0 value0 key1 value1
mp_obj_t mp_call_function_n_kw(mp_obj_t fun_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
// TODO improve this: fun object can specify its type and we parse here the arguments,
// passing to the function arrays of fixed and keyword arguments
DEBUG_OP_printf("calling function %p(n_args=" UINT_FMT ", n_kw=" UINT_FMT ", args=%p)\n", fun_in, n_args, n_kw, args);
// get the type
const mp_obj_type_t *type = mp_obj_get_type(fun_in);
// do the call
if (MP_OBJ_TYPE_HAS_SLOT(type, call)) {
return MP_OBJ_TYPE_GET_SLOT(type, call)(fun_in, n_args, n_kw, args);
}
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_TypeError(MP_ERROR_TEXT("object not callable"));
#else
mp_raise_msg_varg(&mp_type_TypeError,
MP_ERROR_TEXT("'%s' object isn't callable"), mp_obj_get_type_str(fun_in));
#endif
}
// args contains: fun self/NULL arg(0) ... arg(n_args-2) arg(n_args-1) kw_key(0) kw_val(0) ... kw_key(n_kw-1) kw_val(n_kw-1)
// if n_args==0 and n_kw==0 then there are only fun and self/NULL
mp_obj_t mp_call_method_n_kw(size_t n_args, size_t n_kw, const mp_obj_t *args) {
DEBUG_OP_printf("call method (fun=%p, self=%p, n_args=" UINT_FMT ", n_kw=" UINT_FMT ", args=%p)\n", args[0], args[1], n_args, n_kw, args);
int adjust = (args[1] == MP_OBJ_NULL) ? 0 : 1;
return mp_call_function_n_kw(args[0], n_args + adjust, n_kw, args + 2 - adjust);
}
// This function only needs to be exposed externally when in stackless mode.
#if !MICROPY_STACKLESS
STATIC
#endif
void mp_call_prepare_args_n_kw_var(bool have_self, size_t n_args_n_kw, const mp_obj_t *args, mp_call_args_t *out_args) {
mp_obj_t fun = *args++;
mp_obj_t self = MP_OBJ_NULL;
if (have_self) {
self = *args++; // may be MP_OBJ_NULL
}
size_t n_args = n_args_n_kw & 0xff;
size_t n_kw = (n_args_n_kw >> 8) & 0xff;
mp_uint_t star_args = MP_OBJ_SMALL_INT_VALUE(args[n_args + 2 * n_kw]);
DEBUG_OP_printf("call method var (fun=%p, self=%p, n_args=%u, n_kw=%u, args=%p, map=%u)\n", fun, self, n_args, n_kw, args, star_args);
// We need to create the following array of objects:
// args[0 .. n_args] unpacked(pos_seq) args[n_args .. n_args + 2 * n_kw] unpacked(kw_dict)
// TODO: optimize one day to avoid constructing new arg array? Will be hard.
// The new args array
mp_obj_t *args2;
size_t args2_alloc;
size_t args2_len = 0;
// Try to get a hint for unpacked * args length
ssize_t list_len = 0;
if (star_args != 0) {
for (size_t i = 0; i < n_args; i++) {
if ((star_args >> i) & 1) {
mp_obj_t len = mp_obj_len_maybe(args[i]);
if (len != MP_OBJ_NULL) {
// -1 accounts for 1 of n_args occupied by this arg
list_len += mp_obj_get_int(len) - 1;
}
}
}
}
// Try to get a hint for the size of the kw_dict
ssize_t kw_dict_len = 0;
for (size_t i = 0; i < n_kw; i++) {
mp_obj_t key = args[n_args + i * 2];
mp_obj_t value = args[n_args + i * 2 + 1];
if (key == MP_OBJ_NULL && value != MP_OBJ_NULL && mp_obj_is_type(value, &mp_type_dict)) {
// -1 accounts for 1 of n_kw occupied by this arg
kw_dict_len += mp_obj_dict_len(value) - 1;
}
}
// Extract the pos_seq sequence to the new args array.
// Note that it can be arbitrary iterator.
if (star_args == 0) {
// no star args to unpack
// allocate memory for the new array of args
args2_alloc = 1 + n_args + 2 * (n_kw + kw_dict_len);
args2 = mp_nonlocal_alloc(args2_alloc * sizeof(mp_obj_t));
// copy the self
if (self != MP_OBJ_NULL) {
args2[args2_len++] = self;
}
// copy the fixed pos args
mp_seq_copy(args2 + args2_len, args, n_args, mp_obj_t);
args2_len += n_args;
} else {
// at least one star arg to unpack
// allocate memory for the new array of args
args2_alloc = 1 + n_args + list_len + 2 * (n_kw + kw_dict_len);
args2 = mp_nonlocal_alloc(args2_alloc * sizeof(mp_obj_t));
// copy the self
if (self != MP_OBJ_NULL) {
args2[args2_len++] = self;
}
for (size_t i = 0; i < n_args; i++) {
mp_obj_t arg = args[i];
if ((star_args >> i) & 1) {
// star arg
if (mp_obj_is_type(arg, &mp_type_tuple) || mp_obj_is_type(arg, &mp_type_list)) {
// optimise the case of a tuple and list
// get the items
size_t len;
mp_obj_t *items;
mp_obj_get_array(arg, &len, &items);
// copy the items
assert(args2_len + len <= args2_alloc);
mp_seq_copy(args2 + args2_len, items, len, mp_obj_t);
args2_len += len;
} else {
// generic iterator
// extract the variable position args from the iterator
mp_obj_iter_buf_t iter_buf;
mp_obj_t iterable = mp_getiter(arg, &iter_buf);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (args2_len + (n_args - i) >= args2_alloc) {
args2 = mp_nonlocal_realloc(args2, args2_alloc * sizeof(mp_obj_t),
args2_alloc * 2 * sizeof(mp_obj_t));
args2_alloc *= 2;
}
args2[args2_len++] = item;
}
}
} else {
// normal argument
assert(args2_len < args2_alloc);
args2[args2_len++] = arg;
}
}
}
// The size of the args2 array now is the number of positional args.
size_t pos_args_len = args2_len;
// ensure there is still enough room for kw args
if (args2_len + 2 * (n_kw + kw_dict_len) > args2_alloc) {
size_t new_alloc = args2_len + 2 * (n_kw + kw_dict_len);
args2 = mp_nonlocal_realloc(args2, args2_alloc * sizeof(mp_obj_t),
new_alloc * sizeof(mp_obj_t));
args2_alloc = new_alloc;
}
// Copy the kw args.
for (size_t i = 0; i < n_kw; i++) {
mp_obj_t kw_key = args[n_args + i * 2];
mp_obj_t kw_value = args[n_args + i * 2 + 1];
if (kw_key == MP_OBJ_NULL) {
// double-star args
if (mp_obj_is_type(kw_value, &mp_type_dict)) {
// dictionary
mp_map_t *map = mp_obj_dict_get_map(kw_value);
// should have enough, since kw_dict_len is in this case hinted correctly above
assert(args2_len + 2 * map->used <= args2_alloc);
for (size_t j = 0; j < map->alloc; j++) {
if (mp_map_slot_is_filled(map, j)) {
// the key must be a qstr, so intern it if it's a string
mp_obj_t key = map->table[j].key;
if (!mp_obj_is_qstr(key)) {
key = mp_obj_str_intern_checked(key);
}
args2[args2_len++] = key;
args2[args2_len++] = map->table[j].value;
}
}
} else {
// generic mapping:
// - call keys() to get an iterable of all keys in the mapping
// - call __getitem__ for each key to get the corresponding value
// get the keys iterable
mp_obj_t dest[3];
mp_load_method(kw_value, MP_QSTR_keys, dest);
mp_obj_t iterable = mp_getiter(mp_call_method_n_kw(0, 0, dest), NULL);
mp_obj_t key;
while ((key = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
// expand size of args array if needed
if (args2_len + 1 >= args2_alloc) {
size_t new_alloc = args2_alloc * 2;
args2 = mp_nonlocal_realloc(args2, args2_alloc * sizeof(mp_obj_t), new_alloc * sizeof(mp_obj_t));
args2_alloc = new_alloc;
}
// the key must be a qstr, so intern it if it's a string
if (!mp_obj_is_qstr(key)) {
key = mp_obj_str_intern_checked(key);
}
// get the value corresponding to the key
mp_load_method(kw_value, MP_QSTR___getitem__, dest);
dest[2] = key;
mp_obj_t value = mp_call_method_n_kw(1, 0, dest);
// store the key/value pair in the argument array
args2[args2_len++] = key;
args2[args2_len++] = value;
}
}
} else {
// normal kwarg
assert(args2_len + 2 <= args2_alloc);
args2[args2_len++] = kw_key;
args2[args2_len++] = kw_value;
}
}
out_args->fun = fun;
out_args->args = args2;
out_args->n_args = pos_args_len;
out_args->n_kw = (args2_len - pos_args_len) / 2;
out_args->n_alloc = args2_alloc;
}
mp_obj_t mp_call_method_n_kw_var(bool have_self, size_t n_args_n_kw, const mp_obj_t *args) {
mp_call_args_t out_args;
mp_call_prepare_args_n_kw_var(have_self, n_args_n_kw, args, &out_args);
mp_obj_t res = mp_call_function_n_kw(out_args.fun, out_args.n_args, out_args.n_kw, out_args.args);
mp_nonlocal_free(out_args.args, out_args.n_alloc * sizeof(mp_obj_t));
return res;
}
// unpacked items are stored in reverse order into the array pointed to by items
void mp_unpack_sequence(mp_obj_t seq_in, size_t num, mp_obj_t *items) {
size_t seq_len;
if (mp_obj_is_type(seq_in, &mp_type_tuple) || mp_obj_is_type(seq_in, &mp_type_list)) {
mp_obj_t *seq_items;
mp_obj_get_array(seq_in, &seq_len, &seq_items);
if (seq_len < num) {
goto too_short;
} else if (seq_len > num) {
goto too_long;
}
for (size_t i = 0; i < num; i++) {
items[i] = seq_items[num - 1 - i];
}
} else {
mp_obj_iter_buf_t iter_buf;
mp_obj_t iterable = mp_getiter(seq_in, &iter_buf);
for (seq_len = 0; seq_len < num; seq_len++) {
mp_obj_t el = mp_iternext(iterable);
if (el == MP_OBJ_STOP_ITERATION) {
goto too_short;
}
items[num - 1 - seq_len] = el;
}
if (mp_iternext(iterable) != MP_OBJ_STOP_ITERATION) {
goto too_long;
}
}
return;
too_short:
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_ValueError(MP_ERROR_TEXT("wrong number of values to unpack"));
#else
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("need more than %d values to unpack"), (int)seq_len);
#endif
too_long:
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_ValueError(MP_ERROR_TEXT("wrong number of values to unpack"));
#else
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("too many values to unpack (expected %d)"), (int)num);
#endif
}
// unpacked items are stored in reverse order into the array pointed to by items
void mp_unpack_ex(mp_obj_t seq_in, size_t num_in, mp_obj_t *items) {
size_t num_left = num_in & 0xff;
size_t num_right = (num_in >> 8) & 0xff;
DEBUG_OP_printf("unpack ex " UINT_FMT " " UINT_FMT "\n", num_left, num_right);
size_t seq_len;
if (mp_obj_is_type(seq_in, &mp_type_tuple) || mp_obj_is_type(seq_in, &mp_type_list)) {
// Make the seq variable volatile so the compiler keeps a reference to it,
// since if it's a tuple then seq_items points to the interior of the GC cell
// and mp_obj_new_list may trigger a GC which doesn't trace this and reclaims seq.
volatile mp_obj_t seq = seq_in;
mp_obj_t *seq_items;
mp_obj_get_array(seq, &seq_len, &seq_items);
if (seq_len < num_left + num_right) {
goto too_short;
}
for (size_t i = 0; i < num_right; i++) {
items[i] = seq_items[seq_len - 1 - i];
}
items[num_right] = mp_obj_new_list(seq_len - num_left - num_right, seq_items + num_left);
for (size_t i = 0; i < num_left; i++) {
items[num_right + 1 + i] = seq_items[num_left - 1 - i];
}
seq = MP_OBJ_NULL;
} else {
// Generic iterable; this gets a bit messy: we unpack known left length to the
// items destination array, then the rest to a dynamically created list. Once the
// iterable is exhausted, we take from this list for the right part of the items.
// TODO Improve to waste less memory in the dynamically created list.
mp_obj_t iterable = mp_getiter(seq_in, NULL);
mp_obj_t item;
for (seq_len = 0; seq_len < num_left; seq_len++) {
item = mp_iternext(iterable);
if (item == MP_OBJ_STOP_ITERATION) {
goto too_short;
}
items[num_left + num_right + 1 - 1 - seq_len] = item;
}
mp_obj_list_t *rest = MP_OBJ_TO_PTR(mp_obj_new_list(0, NULL));
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
mp_obj_list_append(MP_OBJ_FROM_PTR(rest), item);
}
if (rest->len < num_right) {
goto too_short;
}
items[num_right] = MP_OBJ_FROM_PTR(rest);
for (size_t i = 0; i < num_right; i++) {
items[num_right - 1 - i] = rest->items[rest->len - num_right + i];
}
mp_obj_list_set_len(MP_OBJ_FROM_PTR(rest), rest->len - num_right);
}
return;
too_short:
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_ValueError(MP_ERROR_TEXT("wrong number of values to unpack"));
#else
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("need more than %d values to unpack"), (int)seq_len);
#endif
}
mp_obj_t mp_load_attr(mp_obj_t base, qstr attr) {
DEBUG_OP_printf("load attr %p.%s\n", base, qstr_str(attr));
// use load_method
mp_obj_t dest[2];
mp_load_method(base, attr, dest);
if (dest[1] == MP_OBJ_NULL) {
// load_method returned just a normal attribute
return dest[0];
} else {
// load_method returned a method, so build a bound method object
return mp_obj_new_bound_meth(dest[0], dest[1]);
}
}
#if MICROPY_BUILTIN_METHOD_CHECK_SELF_ARG
// The following "checked fun" type is local to the mp_convert_member_lookup
// function, and serves to check that the first argument to a builtin function
// has the correct type.
typedef struct _mp_obj_checked_fun_t {
mp_obj_base_t base;
const mp_obj_type_t *type;
mp_obj_t fun;
} mp_obj_checked_fun_t;
STATIC mp_obj_t checked_fun_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_obj_checked_fun_t *self = MP_OBJ_TO_PTR(self_in);
if (n_args > 0) {
const mp_obj_type_t *arg0_type = mp_obj_get_type(args[0]);
if (arg0_type != self->type) {
#if MICROPY_ERROR_REPORTING != MICROPY_ERROR_REPORTING_DETAILED
mp_raise_TypeError(MP_ERROR_TEXT("argument has wrong type"));
#else
mp_raise_msg_varg(&mp_type_TypeError,
MP_ERROR_TEXT("argument should be a '%q' not a '%q'"), self->type->name, arg0_type->name);
#endif
}
}
return mp_call_function_n_kw(self->fun, n_args, n_kw, args);
}
STATIC MP_DEFINE_CONST_OBJ_TYPE(
mp_type_checked_fun,
MP_QSTR_function,
MP_TYPE_FLAG_BINDS_SELF,
call, checked_fun_call
);
STATIC mp_obj_t mp_obj_new_checked_fun(const mp_obj_type_t *type, mp_obj_t fun) {
mp_obj_checked_fun_t *o = mp_obj_malloc(mp_obj_checked_fun_t, &mp_type_checked_fun);
o->type = type;
o->fun = fun;
return MP_OBJ_FROM_PTR(o);
}
#endif // MICROPY_BUILTIN_METHOD_CHECK_SELF_ARG
// Given a member that was extracted from an instance, convert it correctly
// and put the result in the dest[] array for a possible method call.
// Conversion means dealing with static/class methods, callables, and values.
// see http://docs.python.org/3/howto/descriptor.html
// and also https://mail.python.org/pipermail/python-dev/2015-March/138950.html
void mp_convert_member_lookup(mp_obj_t self, const mp_obj_type_t *type, mp_obj_t member, mp_obj_t *dest) {
if (mp_obj_is_obj(member)) {
const mp_obj_type_t *m_type = ((mp_obj_base_t *)MP_OBJ_TO_PTR(member))->type;
if (m_type->flags & MP_TYPE_FLAG_BINDS_SELF) {
// `member` is a function that binds self as its first argument.
if (m_type->flags & MP_TYPE_FLAG_BUILTIN_FUN) {
// `member` is a built-in function, which has special behaviour.
if (mp_obj_is_instance_type(type)) {
// Built-in functions on user types always behave like a staticmethod.
dest[0] = member;
}
#if MICROPY_BUILTIN_METHOD_CHECK_SELF_ARG
else if (self == MP_OBJ_NULL && type != &mp_type_object) {
// `member` is a built-in method without a first argument, so wrap
// it in a type checker that will check self when it's supplied.
// Note that object will do its own checking so shouldn't be wrapped.
dest[0] = mp_obj_new_checked_fun(type, member);
}
#endif
else {
// Return a (built-in) bound method, with self being this object.
dest[0] = member;
dest[1] = self;
}
} else {
// Return a bound method, with self being this object.
dest[0] = member;
dest[1] = self;
}
} else if (m_type == &mp_type_staticmethod) {
// `member` is a staticmethod, return the function that it wraps.
dest[0] = ((mp_obj_static_class_method_t *)MP_OBJ_TO_PTR(member))->fun;
} else if (m_type == &mp_type_classmethod) {
// `member` is a classmethod, return a bound method with self being the type of
// this object. This type should be the type of the original instance, not the
// base type (which is what is passed in the `type` argument to this function).
if (self != MP_OBJ_NULL) {
type = mp_obj_get_type(self);
}
dest[0] = ((mp_obj_static_class_method_t *)MP_OBJ_TO_PTR(member))->fun;
dest[1] = MP_OBJ_FROM_PTR(type);
} else {
// `member` is a value, so just return that value.
dest[0] = member;
}
} else {
// `member` is a value, so just return that value.
dest[0] = member;
}
}
// no attribute found, returns: dest[0] == MP_OBJ_NULL, dest[1] == MP_OBJ_NULL
// normal attribute found, returns: dest[0] == <attribute>, dest[1] == MP_OBJ_NULL
// method attribute found, returns: dest[0] == <method>, dest[1] == <self>
void mp_load_method_maybe(mp_obj_t obj, qstr attr, mp_obj_t *dest) {
// clear output to indicate no attribute/method found yet
dest[0] = MP_OBJ_NULL;
dest[1] = MP_OBJ_NULL;
// Note: the specific case of obj being an instance type is fast-path'ed in the VM
// for the MP_BC_LOAD_ATTR opcode. Instance types handle type->attr and look up directly
// in their member's map.
// get the type
const mp_obj_type_t *type = mp_obj_get_type(obj);
// look for built-in names
#if MICROPY_CPYTHON_COMPAT
if (attr == MP_QSTR___class__) {
// a.__class__ is equivalent to type(a)
dest[0] = MP_OBJ_FROM_PTR(type);
return;
}
#endif
if (attr == MP_QSTR___next__ && TYPE_HAS_ITERNEXT(type)) {
dest[0] = MP_OBJ_FROM_PTR(&mp_builtin_next_obj);
dest[1] = obj;
return;
}
if (MP_OBJ_TYPE_HAS_SLOT(type, attr)) {
// this type can do its own load, so call it
MP_OBJ_TYPE_GET_SLOT(type, attr)(obj, attr, dest);
// If type->attr has set dest[1] = MP_OBJ_SENTINEL, we should proceed
// with lookups below (i.e. in locals_dict). If not, return right away.
if (dest[1] != MP_OBJ_SENTINEL) {
return;
}
// Clear the fail flag set by type->attr so it's like it never ran.
dest[1] = MP_OBJ_NULL;
}
if (MP_OBJ_TYPE_HAS_SLOT(type, locals_dict)) {
// generic method lookup
// this is a lookup in the object (ie not class or type)
assert(MP_OBJ_TYPE_GET_SLOT(type, locals_dict)->base.type == &mp_type_dict); // MicroPython restriction, for now
mp_map_t *locals_map = &MP_OBJ_TYPE_GET_SLOT(type, locals_dict)->map;
mp_map_elem_t *elem = mp_map_lookup(locals_map, MP_OBJ_NEW_QSTR(attr), MP_MAP_LOOKUP);
if (elem != NULL) {
mp_convert_member_lookup(obj, type, elem->value, dest);
}
return;
}
}
void mp_load_method(mp_obj_t base, qstr attr, mp_obj_t *dest) {
DEBUG_OP_printf("load method %p.%s\n", base, qstr_str(attr));
mp_load_method_maybe(base, attr, dest);
if (dest[0] == MP_OBJ_NULL) {
// no attribute/method called attr
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_msg(&mp_type_AttributeError, MP_ERROR_TEXT("no such attribute"));
#else
// following CPython, we give a more detailed error message for type objects
if (mp_obj_is_type(base, &mp_type_type)) {
mp_raise_msg_varg(&mp_type_AttributeError,
MP_ERROR_TEXT("type object '%q' has no attribute '%q'"),
((mp_obj_type_t *)MP_OBJ_TO_PTR(base))->name, attr);
} else {
mp_raise_msg_varg(&mp_type_AttributeError,
MP_ERROR_TEXT("'%s' object has no attribute '%q'"),
mp_obj_get_type_str(base), attr);
}
#endif
}
}
// Acts like mp_load_method_maybe but catches AttributeError, and all other exceptions if requested
void mp_load_method_protected(mp_obj_t obj, qstr attr, mp_obj_t *dest, bool catch_all_exc) {
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mp_load_method_maybe(obj, attr, dest);
nlr_pop();
} else {
if (!catch_all_exc
&& !mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(((mp_obj_base_t *)nlr.ret_val)->type),
MP_OBJ_FROM_PTR(&mp_type_AttributeError))) {
// Re-raise the exception
nlr_raise(MP_OBJ_FROM_PTR(nlr.ret_val));
}
}
}
void mp_store_attr(mp_obj_t base, qstr attr, mp_obj_t value) {
DEBUG_OP_printf("store attr %p.%s <- %p\n", base, qstr_str(attr), value);
const mp_obj_type_t *type = mp_obj_get_type(base);
if (MP_OBJ_TYPE_HAS_SLOT(type, attr)) {
mp_obj_t dest[2] = {MP_OBJ_SENTINEL, value};
MP_OBJ_TYPE_GET_SLOT(type, attr)(base, attr, dest);
if (dest[0] == MP_OBJ_NULL) {
// success
return;
}
}
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_msg(&mp_type_AttributeError, MP_ERROR_TEXT("no such attribute"));
#else
mp_raise_msg_varg(&mp_type_AttributeError,
MP_ERROR_TEXT("'%s' object has no attribute '%q'"),
mp_obj_get_type_str(base), attr);
#endif
}
mp_obj_t mp_getiter(mp_obj_t o_in, mp_obj_iter_buf_t *iter_buf) {
assert(o_in);
const mp_obj_type_t *type = mp_obj_get_type(o_in);
// Most types that use iternext just use the identity getiter. We handle this case explicitly
// so we don't unnecessarily allocate any RAM for the iter_buf, which won't be used.
if ((type->flags & MP_TYPE_FLAG_ITER_IS_ITERNEXT) == MP_TYPE_FLAG_ITER_IS_ITERNEXT || (type->flags & MP_TYPE_FLAG_ITER_IS_STREAM) == MP_TYPE_FLAG_ITER_IS_STREAM) {
return o_in;
}
if (MP_OBJ_TYPE_HAS_SLOT(type, iter)) {
// check for native getiter (corresponds to __iter__)
if (iter_buf == NULL && MP_OBJ_TYPE_GET_SLOT(type, iter) != mp_obj_instance_getiter) {
// if caller did not provide a buffer then allocate one on the heap
// mp_obj_instance_getiter is special, it will allocate only if needed
iter_buf = m_new_obj(mp_obj_iter_buf_t);
}
mp_getiter_fun_t getiter;
if (type->flags & MP_TYPE_FLAG_ITER_IS_CUSTOM) {
getiter = ((mp_getiter_iternext_custom_t *)MP_OBJ_TYPE_GET_SLOT(type, iter))->getiter;
} else {
getiter = (mp_getiter_fun_t)MP_OBJ_TYPE_GET_SLOT(type, iter);
}
mp_obj_t iter = getiter(o_in, iter_buf);
if (iter != MP_OBJ_NULL) {
return iter;
}
}
// check for __getitem__
mp_obj_t dest[2];
mp_load_method_maybe(o_in, MP_QSTR___getitem__, dest);
if (dest[0] != MP_OBJ_NULL) {
// __getitem__ exists, create and return an iterator
if (iter_buf == NULL) {
// if caller did not provide a buffer then allocate one on the heap
iter_buf = m_new_obj(mp_obj_iter_buf_t);
}
return mp_obj_new_getitem_iter(dest, iter_buf);
}
// object not iterable
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_TypeError(MP_ERROR_TEXT("object not iterable"));
#else
mp_raise_msg_varg(&mp_type_TypeError,
MP_ERROR_TEXT("'%s' object isn't iterable"), mp_obj_get_type_str(o_in));
#endif
}
STATIC mp_fun_1_t type_get_iternext(const mp_obj_type_t *type) {
if ((type->flags & MP_TYPE_FLAG_ITER_IS_STREAM) == MP_TYPE_FLAG_ITER_IS_STREAM) {
mp_obj_t mp_stream_unbuffered_iter(mp_obj_t self);
return mp_stream_unbuffered_iter;
} else if (type->flags & MP_TYPE_FLAG_ITER_IS_ITERNEXT) {
return (mp_fun_1_t)MP_OBJ_TYPE_GET_SLOT(type, iter);
} else if (type->flags & MP_TYPE_FLAG_ITER_IS_CUSTOM) {
return ((mp_getiter_iternext_custom_t *)MP_OBJ_TYPE_GET_SLOT(type, iter))->iternext;
} else {
return NULL;
}
}
// may return MP_OBJ_STOP_ITERATION as an optimisation instead of raise StopIteration()
// may also raise StopIteration()
mp_obj_t mp_iternext_allow_raise(mp_obj_t o_in) {
const mp_obj_type_t *type = mp_obj_get_type(o_in);
if (TYPE_HAS_ITERNEXT(type)) {
MP_STATE_THREAD(stop_iteration_arg) = MP_OBJ_NULL;
return type_get_iternext(type)(o_in);
} else {
// check for __next__ method
mp_obj_t dest[2];
mp_load_method_maybe(o_in, MP_QSTR___next__, dest);
if (dest[0] != MP_OBJ_NULL) {
// __next__ exists, call it and return its result
return mp_call_method_n_kw(0, 0, dest);
} else {
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_TypeError(MP_ERROR_TEXT("object not an iterator"));
#else
mp_raise_msg_varg(&mp_type_TypeError,
MP_ERROR_TEXT("'%s' object isn't an iterator"), mp_obj_get_type_str(o_in));
#endif
}
}
}
// will always return MP_OBJ_STOP_ITERATION instead of raising StopIteration() (or any subclass thereof)
// may raise other exceptions
mp_obj_t mp_iternext(mp_obj_t o_in) {
MP_STACK_CHECK(); // enumerate, filter, map and zip can recursively call mp_iternext
const mp_obj_type_t *type = mp_obj_get_type(o_in);
if (TYPE_HAS_ITERNEXT(type)) {
MP_STATE_THREAD(stop_iteration_arg) = MP_OBJ_NULL;
return type_get_iternext(type)(o_in);
} else {
// check for __next__ method
mp_obj_t dest[2];
mp_load_method_maybe(o_in, MP_QSTR___next__, dest);
if (dest[0] != MP_OBJ_NULL) {
// __next__ exists, call it and return its result
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mp_obj_t ret = mp_call_method_n_kw(0, 0, dest);
nlr_pop();
return ret;
} else {
if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(((mp_obj_base_t *)nlr.ret_val)->type), MP_OBJ_FROM_PTR(&mp_type_StopIteration))) {
return mp_make_stop_iteration(mp_obj_exception_get_value(MP_OBJ_FROM_PTR(nlr.ret_val)));
} else {
nlr_jump(nlr.ret_val);
}
}
} else {
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
mp_raise_TypeError(MP_ERROR_TEXT("object not an iterator"));
#else
mp_raise_msg_varg(&mp_type_TypeError,
MP_ERROR_TEXT("'%s' object isn't an iterator"), mp_obj_get_type_str(o_in));
#endif
}
}
}
mp_vm_return_kind_t mp_resume(mp_obj_t self_in, mp_obj_t send_value, mp_obj_t throw_value, mp_obj_t *ret_val) {
assert((send_value != MP_OBJ_NULL) ^ (throw_value != MP_OBJ_NULL));
const mp_obj_type_t *type = mp_obj_get_type(self_in);
if (type == &mp_type_gen_instance) {
return mp_obj_gen_resume(self_in, send_value, throw_value, ret_val);
}
if (TYPE_HAS_ITERNEXT(type) && send_value == mp_const_none) {
MP_STATE_THREAD(stop_iteration_arg) = MP_OBJ_NULL;
mp_obj_t ret = type_get_iternext(type)(self_in);
*ret_val = ret;
if (ret != MP_OBJ_STOP_ITERATION) {
return MP_VM_RETURN_YIELD;
} else {
// The generator is finished.
// This is an optimised "raise StopIteration(*ret_val)".
*ret_val = MP_STATE_THREAD(stop_iteration_arg);
if (*ret_val == MP_OBJ_NULL) {
*ret_val = mp_const_none;
}
return MP_VM_RETURN_NORMAL;
}
}
mp_obj_t dest[3]; // Reserve slot for send() arg
// Python instance iterator protocol
if (send_value == mp_const_none) {
mp_load_method_maybe(self_in, MP_QSTR___next__, dest);
if (dest[0] != MP_OBJ_NULL) {
*ret_val = mp_call_method_n_kw(0, 0, dest);
return MP_VM_RETURN_YIELD;
}
}
// Either python instance generator protocol, or native object
// generator protocol.
if (send_value != MP_OBJ_NULL) {
mp_load_method(self_in, MP_QSTR_send, dest);
dest[2] = send_value;
*ret_val = mp_call_method_n_kw(1, 0, dest);
return MP_VM_RETURN_YIELD;
}
assert(throw_value != MP_OBJ_NULL);
{
if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(mp_obj_get_type(throw_value)), MP_OBJ_FROM_PTR(&mp_type_GeneratorExit))) {
mp_load_method_maybe(self_in, MP_QSTR_close, dest);
if (dest[0] != MP_OBJ_NULL) {
// TODO: Exceptions raised in close() are not propagated,
// printed to sys.stderr
*ret_val = mp_call_method_n_kw(0, 0, dest);
// We assume one can't "yield" from close()
return MP_VM_RETURN_NORMAL;
}
} else {
mp_load_method_maybe(self_in, MP_QSTR_throw, dest);
if (dest[0] != MP_OBJ_NULL) {
dest[2] = throw_value;
*ret_val = mp_call_method_n_kw(1, 0, dest);
// If .throw() method returned, we assume it's value to yield
// - any exception would be thrown with nlr_raise().
return MP_VM_RETURN_YIELD;
}
}
// If there's nowhere to throw exception into, then we assume that object
// is just incapable to handle it, so any exception thrown into it
// will be propagated up. This behavior is approved by test_pep380.py
// test_delegation_of_close_to_non_generator(),
// test_delegating_throw_to_non_generator()
if (mp_obj_exception_match(throw_value, MP_OBJ_FROM_PTR(&mp_type_StopIteration))) {
// PEP479: if StopIteration is raised inside a generator it is replaced with RuntimeError
*ret_val = mp_obj_new_exception_msg(&mp_type_RuntimeError, MP_ERROR_TEXT("generator raised StopIteration"));
} else {
*ret_val = mp_make_raise_obj(throw_value);
}
return MP_VM_RETURN_EXCEPTION;
}
}
mp_obj_t mp_make_raise_obj(mp_obj_t o) {
DEBUG_printf("raise %p\n", o);
if (mp_obj_is_exception_type(o)) {
// o is an exception type (it is derived from BaseException (or is BaseException))
// create and return a new exception instance by calling o
// TODO could have an option to disable traceback, then builtin exceptions (eg TypeError)
// could have const instances in ROM which we return here instead
o = mp_call_function_n_kw(o, 0, 0, NULL);
}
if (mp_obj_is_exception_instance(o)) {
// o is an instance of an exception, so use it as the exception
return o;
} else {
// o cannot be used as an exception, so return a type error (which will be raised by the caller)
return mp_obj_new_exception_msg(&mp_type_TypeError, MP_ERROR_TEXT("exceptions must derive from BaseException"));
}
}
mp_obj_t mp_import_name(qstr name, mp_obj_t fromlist, mp_obj_t level) {
DEBUG_printf("import name '%s' level=%d\n", qstr_str(name), MP_OBJ_SMALL_INT_VALUE(level));
// build args array
mp_obj_t args[5];
args[0] = MP_OBJ_NEW_QSTR(name);
args[1] = mp_const_none; // TODO should be globals
args[2] = mp_const_none; // TODO should be locals
args[3] = fromlist;
args[4] = level;
#if MICROPY_CAN_OVERRIDE_BUILTINS
// Lookup __import__ and call that if it exists
mp_obj_dict_t *bo_dict = MP_STATE_VM(mp_module_builtins_override_dict);
if (bo_dict != NULL) {
mp_map_elem_t *import = mp_map_lookup(&bo_dict->map, MP_OBJ_NEW_QSTR(MP_QSTR___import__), MP_MAP_LOOKUP);
if (import != NULL) {
return mp_call_function_n_kw(import->value, 5, 0, args);
}
}
#endif
return mp_builtin___import__(5, args);
}
mp_obj_t mp_import_from(mp_obj_t module, qstr name) {
DEBUG_printf("import from %p %s\n", module, qstr_str(name));
mp_obj_t dest[2];
mp_load_method_maybe(module, name, dest);
if (dest[1] != MP_OBJ_NULL) {
// Hopefully we can't import bound method from an object
import_error:
mp_raise_msg_varg(&mp_type_ImportError, MP_ERROR_TEXT("can't import name %q"), name);
}
if (dest[0] != MP_OBJ_NULL) {
return dest[0];
}
#if MICROPY_ENABLE_EXTERNAL_IMPORT
// See if it's a package, then can try FS import
mp_load_method_maybe(module, MP_QSTR___path__, dest);
if (dest[0] == MP_OBJ_NULL) {
goto import_error;
}
mp_load_method_maybe(module, MP_QSTR___name__, dest);
size_t pkg_name_len;
const char *pkg_name = mp_obj_str_get_data(dest[0], &pkg_name_len);
const uint dot_name_len = pkg_name_len + 1 + qstr_len(name);
char *dot_name = mp_local_alloc(dot_name_len);
memcpy(dot_name, pkg_name, pkg_name_len);
dot_name[pkg_name_len] = '.';
memcpy(dot_name + pkg_name_len + 1, qstr_str(name), qstr_len(name));
qstr dot_name_q = qstr_from_strn(dot_name, dot_name_len);
mp_local_free(dot_name);
// For fromlist, pass sentinel "non empty" value to force returning of leaf module
return mp_import_name(dot_name_q, mp_const_true, MP_OBJ_NEW_SMALL_INT(0));
#else
// Package import not supported with external imports disabled
goto import_error;
#endif
}
void mp_import_all(mp_obj_t module) {
DEBUG_printf("import all %p\n", module);
// TODO: Support __all__
mp_map_t *map = &mp_obj_module_get_globals(module)->map;
for (size_t i = 0; i < map->alloc; i++) {
if (mp_map_slot_is_filled(map, i)) {
// Entry in module global scope may be generated programmatically
// (and thus be not a qstr for longer names). Avoid turning it in
// qstr if it has '_' and was used exactly to save memory.
const char *name = mp_obj_str_get_str(map->table[i].key);
if (*name != '_') {
qstr qname = mp_obj_str_get_qstr(map->table[i].key);
mp_store_name(qname, map->table[i].value);
}
}
}
}
#if MICROPY_ENABLE_COMPILER
mp_obj_t mp_parse_compile_execute(mp_lexer_t *lex, mp_parse_input_kind_t parse_input_kind, mp_obj_dict_t *globals, mp_obj_dict_t *locals) {
// save context
mp_obj_dict_t *volatile old_globals = mp_globals_get();
mp_obj_dict_t *volatile old_locals = mp_locals_get();
// set new context
mp_globals_set(globals);
mp_locals_set(locals);
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
qstr source_name = lex->source_name;
mp_parse_tree_t parse_tree = mp_parse(lex, parse_input_kind);
mp_obj_t module_fun = mp_compile(&parse_tree, source_name, parse_input_kind == MP_PARSE_SINGLE_INPUT);
mp_obj_t ret;
if (MICROPY_PY_BUILTINS_COMPILE && globals == NULL) {
// for compile only, return value is the module function
ret = module_fun;
} else {
// execute module function and get return value
ret = mp_call_function_0(module_fun);
}
// finish nlr block, restore context and return value
nlr_pop();
mp_globals_set(old_globals);
mp_locals_set(old_locals);
return ret;
} else {
// exception; restore context and re-raise same exception
mp_globals_set(old_globals);
mp_locals_set(old_locals);
nlr_jump(nlr.ret_val);
}
}
#endif // MICROPY_ENABLE_COMPILER
NORETURN void m_malloc_fail(size_t num_bytes) {
DEBUG_printf("memory allocation failed, allocating %u bytes\n", (uint)num_bytes);
#if MICROPY_ENABLE_GC
if (gc_is_locked()) {
mp_raise_msg(&mp_type_MemoryError, MP_ERROR_TEXT("memory allocation failed, heap is locked"));
}
#endif
mp_raise_msg_varg(&mp_type_MemoryError,
MP_ERROR_TEXT("memory allocation failed, allocating %u bytes"), (uint)num_bytes);
}
#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_NONE
NORETURN void mp_raise_type(const mp_obj_type_t *exc_type) {
nlr_raise(mp_obj_new_exception(exc_type));
}
NORETURN void mp_raise_ValueError_no_msg(void) {
mp_raise_type(&mp_type_ValueError);
}
NORETURN void mp_raise_TypeError_no_msg(void) {
mp_raise_type(&mp_type_TypeError);
}
NORETURN void mp_raise_NotImplementedError_no_msg(void) {
mp_raise_type(&mp_type_NotImplementedError);
}
#else
NORETURN void mp_raise_msg(const mp_obj_type_t *exc_type, mp_rom_error_text_t msg) {
if (msg == NULL) {
nlr_raise(mp_obj_new_exception(exc_type));
} else {
nlr_raise(mp_obj_new_exception_msg(exc_type, msg));
}
}
NORETURN void mp_raise_msg_varg(const mp_obj_type_t *exc_type, mp_rom_error_text_t fmt, ...) {
va_list args;
va_start(args, fmt);
mp_obj_t exc = mp_obj_new_exception_msg_vlist(exc_type, fmt, args);
va_end(args);
nlr_raise(exc);
}
NORETURN void mp_raise_ValueError(mp_rom_error_text_t msg) {
mp_raise_msg(&mp_type_ValueError, msg);
}
NORETURN void mp_raise_TypeError(mp_rom_error_text_t msg) {
mp_raise_msg(&mp_type_TypeError, msg);
}
NORETURN void mp_raise_NotImplementedError(mp_rom_error_text_t msg) {
mp_raise_msg(&mp_type_NotImplementedError, msg);
}
#endif
NORETURN void mp_raise_type_arg(const mp_obj_type_t *exc_type, mp_obj_t arg) {
nlr_raise(mp_obj_new_exception_arg1(exc_type, arg));
}
NORETURN void mp_raise_StopIteration(mp_obj_t arg) {
if (arg == MP_OBJ_NULL) {
mp_raise_type(&mp_type_StopIteration);
} else {
mp_raise_type_arg(&mp_type_StopIteration, arg);
}
}
NORETURN void mp_raise_TypeError_int_conversion(mp_const_obj_t arg) {
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE
(void)arg;
mp_raise_TypeError(MP_ERROR_TEXT("can't convert to int"));
#else
mp_raise_msg_varg(&mp_type_TypeError,
MP_ERROR_TEXT("can't convert %s to int"), mp_obj_get_type_str(arg));
#endif
}
NORETURN void mp_raise_OSError(int errno_) {
mp_raise_type_arg(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(errno_));
}
NORETURN void mp_raise_OSError_with_filename(int errno_, const char *filename) {
vstr_t vstr;
vstr_init(&vstr, 32);
vstr_printf(&vstr, "can't open %s", filename);
mp_obj_t o_str = mp_obj_new_str_from_vstr(&vstr);
mp_obj_t args[2] = { MP_OBJ_NEW_SMALL_INT(errno_), MP_OBJ_FROM_PTR(o_str)};
nlr_raise(mp_obj_exception_make_new(&mp_type_OSError, 2, 0, args));
}
#if MICROPY_STACK_CHECK || MICROPY_ENABLE_PYSTACK
NORETURN void mp_raise_recursion_depth(void) {
mp_raise_type_arg(&mp_type_RuntimeError, MP_OBJ_NEW_QSTR(MP_QSTR_maximum_space_recursion_space_depth_space_exceeded));
}
#endif
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