2014-09-04 13:44:01 +00:00
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/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014 Damien P. George
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* Copyright (c) 2014 Paul Sokolovsky
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdbool.h>
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#include <string.h>
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#include <assert.h>
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2015-01-01 20:27:54 +00:00
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#include "py/nlr.h"
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#include "py/objfun.h"
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2015-10-22 22:45:37 +00:00
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#include "py/runtime0.h"
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2015-11-02 21:55:42 +00:00
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#include "py/bc0.h"
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2015-01-01 20:27:54 +00:00
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#include "py/bc.h"
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2014-09-04 13:44:01 +00:00
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#if 0 // print debugging info
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#define DEBUG_PRINT (1)
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#else // don't print debugging info
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2014-11-05 21:16:41 +00:00
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#define DEBUG_PRINT (0)
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2014-09-04 13:44:01 +00:00
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#define DEBUG_printf(...) (void)0
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#endif
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mp_uint_t mp_decode_uint(const byte **ptr) {
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mp_uint_t unum = 0;
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byte val;
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const byte *p = *ptr;
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do {
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val = *p++;
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unum = (unum << 7) | (val & 0x7f);
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} while ((val & 0x80) != 0);
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*ptr = p;
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return unum;
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}
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2015-12-17 12:33:42 +00:00
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STATIC NORETURN void fun_pos_args_mismatch(mp_obj_fun_bc_t *f, size_t expected, size_t given) {
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2014-09-04 13:44:01 +00:00
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#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE
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2015-01-01 15:33:50 +00:00
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// generic message, used also for other argument issues
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2015-09-04 15:53:46 +00:00
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(void)f;
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(void)expected;
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(void)given;
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2015-01-01 15:33:50 +00:00
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mp_arg_error_terse_mismatch();
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2014-09-04 13:44:01 +00:00
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#elif MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_NORMAL
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2015-09-04 15:53:46 +00:00
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(void)f;
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2014-09-04 13:44:01 +00:00
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"function takes %d positional arguments but %d were given", expected, given));
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#elif MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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2015-04-11 12:03:37 +00:00
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"%q() takes %d positional arguments but %d were given",
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2015-11-27 17:01:44 +00:00
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mp_obj_fun_get_name(MP_OBJ_FROM_PTR(f)), expected, given));
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2014-09-04 13:44:01 +00:00
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#endif
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}
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#if DEBUG_PRINT
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2015-12-17 12:33:42 +00:00
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STATIC void dump_args(const mp_obj_t *a, size_t sz) {
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2014-09-04 13:44:01 +00:00
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DEBUG_printf("%p: ", a);
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2015-12-17 12:33:42 +00:00
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for (size_t i = 0; i < sz; i++) {
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2014-09-04 13:44:01 +00:00
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DEBUG_printf("%p ", a[i]);
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}
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DEBUG_printf("\n");
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}
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#else
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#define dump_args(...) (void)0
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#endif
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2015-04-06 21:38:53 +00:00
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// On entry code_state should be allocated somewhere (stack/heap) and
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// contain the following valid entries:
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// - code_state->ip should contain the offset in bytes from the start of
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2015-03-18 17:47:47 +00:00
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// the bytecode chunk to just after n_state and n_exc_stack
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2015-04-06 21:38:53 +00:00
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// - code_state->n_state should be set to the state size (locals plus stack)
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2016-08-27 13:21:00 +00:00
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void mp_setup_code_state(mp_code_state_t *code_state, mp_obj_fun_bc_t *self, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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2014-09-04 13:44:01 +00:00
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// This function is pretty complicated. It's main aim is to be efficient in speed and RAM
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// usage for the common case of positional only args.
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2015-12-17 12:33:42 +00:00
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size_t n_state = code_state->n_state;
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2014-09-04 13:44:01 +00:00
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2015-03-18 17:47:47 +00:00
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// ip comes in as an offset into bytecode, so turn it into a true pointer
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2015-11-27 17:01:44 +00:00
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code_state->ip = self->bytecode + (size_t)code_state->ip;
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2015-03-18 17:47:47 +00:00
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2015-10-23 00:23:11 +00:00
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// store pointer to constant table
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code_state->const_table = self->const_table;
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2015-03-27 23:14:44 +00:00
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#if MICROPY_STACKLESS
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code_state->prev = NULL;
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#endif
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2015-03-18 17:47:47 +00:00
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2015-10-22 22:45:37 +00:00
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// get params
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2015-12-17 12:33:42 +00:00
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size_t scope_flags = *code_state->ip++;
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size_t n_pos_args = *code_state->ip++;
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size_t n_kwonly_args = *code_state->ip++;
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size_t n_def_pos_args = *code_state->ip++;
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2015-10-22 22:45:37 +00:00
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2014-09-04 13:44:01 +00:00
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code_state->sp = &code_state->state[0] - 1;
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code_state->exc_sp = (mp_exc_stack_t*)(code_state->state + n_state) - 1;
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// zero out the local stack to begin with
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memset(code_state->state, 0, n_state * sizeof(*code_state->state));
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const mp_obj_t *kwargs = args + n_args;
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// var_pos_kw_args points to the stack where the var-args tuple, and var-kw dict, should go (if they are needed)
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2015-10-22 22:45:37 +00:00
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mp_obj_t *var_pos_kw_args = &code_state->state[n_state - 1 - n_pos_args - n_kwonly_args];
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2014-09-04 13:44:01 +00:00
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// check positional arguments
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2015-10-22 22:45:37 +00:00
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if (n_args > n_pos_args) {
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2014-09-04 13:44:01 +00:00
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// given more than enough arguments
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2015-10-22 22:45:37 +00:00
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if ((scope_flags & MP_SCOPE_FLAG_VARARGS) == 0) {
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fun_pos_args_mismatch(self, n_pos_args, n_args);
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2014-09-04 13:44:01 +00:00
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}
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// put extra arguments in varargs tuple
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2015-10-22 22:45:37 +00:00
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*var_pos_kw_args-- = mp_obj_new_tuple(n_args - n_pos_args, args + n_pos_args);
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n_args = n_pos_args;
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2014-09-04 13:44:01 +00:00
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} else {
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2015-10-22 22:45:37 +00:00
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if ((scope_flags & MP_SCOPE_FLAG_VARARGS) != 0) {
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2014-09-04 13:44:01 +00:00
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DEBUG_printf("passing empty tuple as *args\n");
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*var_pos_kw_args-- = mp_const_empty_tuple;
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}
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// Apply processing and check below only if we don't have kwargs,
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// otherwise, kw handling code below has own extensive checks.
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2015-10-22 22:45:37 +00:00
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if (n_kw == 0 && (scope_flags & MP_SCOPE_FLAG_DEFKWARGS) == 0) {
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2015-12-17 12:33:42 +00:00
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if (n_args >= (size_t)(n_pos_args - n_def_pos_args)) {
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2014-09-04 13:44:01 +00:00
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// given enough arguments, but may need to use some default arguments
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2015-12-17 12:33:42 +00:00
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for (size_t i = n_args; i < n_pos_args; i++) {
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2015-10-22 22:45:37 +00:00
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code_state->state[n_state - 1 - i] = self->extra_args[i - (n_pos_args - n_def_pos_args)];
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2014-09-04 13:44:01 +00:00
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}
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} else {
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2015-10-22 22:45:37 +00:00
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fun_pos_args_mismatch(self, n_pos_args - n_def_pos_args, n_args);
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2014-09-04 13:44:01 +00:00
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}
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}
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}
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// copy positional args into state
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2015-12-17 12:33:42 +00:00
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for (size_t i = 0; i < n_args; i++) {
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2014-09-04 13:44:01 +00:00
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code_state->state[n_state - 1 - i] = args[i];
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}
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// check keyword arguments
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2015-10-22 22:45:37 +00:00
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if (n_kw != 0 || (scope_flags & MP_SCOPE_FLAG_DEFKWARGS) != 0) {
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2014-09-04 13:44:01 +00:00
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DEBUG_printf("Initial args: ");
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2015-10-22 22:45:37 +00:00
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dump_args(code_state->state + n_state - n_pos_args - n_kwonly_args, n_pos_args + n_kwonly_args);
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2014-09-04 13:44:01 +00:00
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mp_obj_t dict = MP_OBJ_NULL;
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2015-10-22 22:45:37 +00:00
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if ((scope_flags & MP_SCOPE_FLAG_VARKEYWORDS) != 0) {
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2014-09-04 13:44:01 +00:00
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dict = mp_obj_new_dict(n_kw); // TODO: better go conservative with 0?
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*var_pos_kw_args = dict;
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}
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2015-03-18 17:47:47 +00:00
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// get pointer to arg_names array
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2015-10-23 00:23:11 +00:00
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const mp_obj_t *arg_names = (const mp_obj_t*)code_state->const_table;
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2014-10-25 14:07:02 +00:00
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2015-12-17 12:33:42 +00:00
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for (size_t i = 0; i < n_kw; i++) {
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2016-04-21 15:51:36 +00:00
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// the keys in kwargs are expected to be qstr objects
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2014-10-25 14:07:02 +00:00
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mp_obj_t wanted_arg_name = kwargs[2 * i];
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2015-12-17 12:33:42 +00:00
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for (size_t j = 0; j < n_pos_args + n_kwonly_args; j++) {
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2014-10-25 14:07:02 +00:00
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if (wanted_arg_name == arg_names[j]) {
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2014-09-04 13:44:01 +00:00
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if (code_state->state[n_state - 1 - j] != MP_OBJ_NULL) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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2015-04-11 12:03:37 +00:00
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"function got multiple values for argument '%q'", MP_OBJ_QSTR_VALUE(wanted_arg_name)));
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2014-09-04 13:44:01 +00:00
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}
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code_state->state[n_state - 1 - j] = kwargs[2 * i + 1];
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goto continue2;
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}
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}
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// Didn't find name match with positional args
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2015-10-22 22:45:37 +00:00
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if ((scope_flags & MP_SCOPE_FLAG_VARKEYWORDS) == 0) {
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2014-09-04 13:44:01 +00:00
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nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "function does not take keyword arguments"));
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}
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mp_obj_dict_store(dict, kwargs[2 * i], kwargs[2 * i + 1]);
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continue2:;
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}
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DEBUG_printf("Args with kws flattened: ");
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2015-10-22 22:45:37 +00:00
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dump_args(code_state->state + n_state - n_pos_args - n_kwonly_args, n_pos_args + n_kwonly_args);
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2014-09-04 13:44:01 +00:00
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// fill in defaults for positional args
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2015-10-22 22:45:37 +00:00
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mp_obj_t *d = &code_state->state[n_state - n_pos_args];
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mp_obj_t *s = &self->extra_args[n_def_pos_args - 1];
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2015-12-17 12:33:42 +00:00
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for (size_t i = n_def_pos_args; i > 0; i--, d++, s--) {
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2014-09-04 13:44:01 +00:00
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if (*d == MP_OBJ_NULL) {
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*d = *s;
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}
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}
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DEBUG_printf("Args after filling default positional: ");
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2015-10-22 22:45:37 +00:00
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dump_args(code_state->state + n_state - n_pos_args - n_kwonly_args, n_pos_args + n_kwonly_args);
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2014-09-04 13:44:01 +00:00
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// Check that all mandatory positional args are specified
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while (d < &code_state->state[n_state]) {
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if (*d++ == MP_OBJ_NULL) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"function missing required positional argument #%d", &code_state->state[n_state] - d));
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}
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}
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// Check that all mandatory keyword args are specified
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// Fill in default kw args if we have them
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2015-12-17 12:33:42 +00:00
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for (size_t i = 0; i < n_kwonly_args; i++) {
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2015-10-22 22:45:37 +00:00
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if (code_state->state[n_state - 1 - n_pos_args - i] == MP_OBJ_NULL) {
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2014-09-04 13:44:01 +00:00
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mp_map_elem_t *elem = NULL;
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2015-10-22 22:45:37 +00:00
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if ((scope_flags & MP_SCOPE_FLAG_DEFKWARGS) != 0) {
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2015-11-27 17:01:44 +00:00
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elem = mp_map_lookup(&((mp_obj_dict_t*)MP_OBJ_TO_PTR(self->extra_args[n_def_pos_args]))->map, arg_names[n_pos_args + i], MP_MAP_LOOKUP);
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2014-09-04 13:44:01 +00:00
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}
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if (elem != NULL) {
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2015-10-22 22:45:37 +00:00
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code_state->state[n_state - 1 - n_pos_args - i] = elem->value;
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2014-09-04 13:44:01 +00:00
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} else {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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2015-10-22 22:45:37 +00:00
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"function missing required keyword argument '%q'", MP_OBJ_QSTR_VALUE(arg_names[n_pos_args + i])));
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2014-09-04 13:44:01 +00:00
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}
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}
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}
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} else {
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// no keyword arguments given
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2015-10-22 22:45:37 +00:00
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if (n_kwonly_args != 0) {
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2014-09-04 13:44:01 +00:00
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nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError,
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"function missing keyword-only argument"));
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}
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2015-10-22 22:45:37 +00:00
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if ((scope_flags & MP_SCOPE_FLAG_VARKEYWORDS) != 0) {
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2014-09-04 13:44:01 +00:00
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*var_pos_kw_args = mp_obj_new_dict(0);
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}
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}
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2015-03-18 17:47:47 +00:00
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// get the ip and skip argument names
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const byte *ip = code_state->ip;
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// store pointer to code_info and jump over it
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{
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code_state->code_info = ip;
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const byte *ip2 = ip;
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2015-12-17 12:33:42 +00:00
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size_t code_info_size = mp_decode_uint(&ip2);
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2015-03-18 17:47:47 +00:00
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ip += code_info_size;
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}
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2014-09-04 13:44:01 +00:00
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// bytecode prelude: initialise closed over variables
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2015-12-17 12:33:42 +00:00
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size_t local_num;
|
2015-04-06 23:08:17 +00:00
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while ((local_num = *ip++) != 255) {
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|
code_state->state[n_state - 1 - local_num] =
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mp_obj_new_cell(code_state->state[n_state - 1 - local_num]);
|
2014-09-04 13:44:01 +00:00
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|
}
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// now that we skipped over the prelude, set the ip for the VM
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|
code_state->ip = ip;
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|
2015-10-22 22:45:37 +00:00
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|
DEBUG_printf("Calling: n_pos_args=%d, n_kwonly_args=%d\n", n_pos_args, n_kwonly_args);
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|
|
|
dump_args(code_state->state + n_state - n_pos_args - n_kwonly_args, n_pos_args + n_kwonly_args);
|
2014-09-04 13:44:01 +00:00
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|
dump_args(code_state->state, n_state);
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|
}
|
2015-11-02 21:55:42 +00:00
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#if MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE
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// The following table encodes the number of bytes that a specific opcode
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// takes up. There are 3 special opcodes that always have an extra byte:
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// MP_BC_MAKE_CLOSURE
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// MP_BC_MAKE_CLOSURE_DEFARGS
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// MP_BC_RAISE_VARARGS
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// There are 4 special opcodes that have an extra byte only when
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// MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE is enabled:
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// MP_BC_LOAD_NAME
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// MP_BC_LOAD_GLOBAL
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// MP_BC_LOAD_ATTR
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// MP_BC_STORE_ATTR
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#define OC4(a, b, c, d) (a | (b << 2) | (c << 4) | (d << 6))
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#define U (0) // undefined opcode
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#define B (MP_OPCODE_BYTE) // single byte
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#define Q (MP_OPCODE_QSTR) // single byte plus 2-byte qstr
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#define V (MP_OPCODE_VAR_UINT) // single byte plus variable encoded unsigned int
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#define O (MP_OPCODE_OFFSET) // single byte plus 2-byte bytecode offset
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STATIC const byte opcode_format_table[64] = {
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OC4(U, U, U, U), // 0x00-0x03
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OC4(U, U, U, U), // 0x04-0x07
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OC4(U, U, U, U), // 0x08-0x0b
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OC4(U, U, U, U), // 0x0c-0x0f
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OC4(B, B, B, U), // 0x10-0x13
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OC4(V, U, Q, V), // 0x14-0x17
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OC4(B, U, V, V), // 0x18-0x1b
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OC4(Q, Q, Q, Q), // 0x1c-0x1f
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OC4(B, B, V, V), // 0x20-0x23
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OC4(Q, Q, Q, B), // 0x24-0x27
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OC4(V, V, Q, Q), // 0x28-0x2b
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OC4(U, U, U, U), // 0x2c-0x2f
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OC4(B, B, B, B), // 0x30-0x33
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OC4(B, O, O, O), // 0x34-0x37
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OC4(O, O, U, U), // 0x38-0x3b
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OC4(U, O, B, O), // 0x3c-0x3f
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OC4(O, B, B, O), // 0x40-0x43
|
2016-01-28 16:11:41 +00:00
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OC4(B, B, O, U), // 0x44-0x47
|
2015-11-02 21:55:42 +00:00
|
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OC4(U, U, U, U), // 0x48-0x4b
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OC4(U, U, U, U), // 0x4c-0x4f
|
2016-09-23 02:48:57 +00:00
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OC4(V, V, U, V), // 0x50-0x53
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OC4(B, U, V, V), // 0x54-0x57
|
2015-11-02 21:55:42 +00:00
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OC4(V, V, V, B), // 0x58-0x5b
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OC4(B, B, B, U), // 0x5c-0x5f
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OC4(V, V, V, V), // 0x60-0x63
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OC4(V, V, V, V), // 0x64-0x67
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OC4(Q, Q, B, U), // 0x68-0x6b
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OC4(U, U, U, U), // 0x6c-0x6f
|
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OC4(B, B, B, B), // 0x70-0x73
|
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|
|
OC4(B, B, B, B), // 0x74-0x77
|
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|
|
OC4(B, B, B, B), // 0x78-0x7b
|
|
|
|
OC4(B, B, B, B), // 0x7c-0x7f
|
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|
|
OC4(B, B, B, B), // 0x80-0x83
|
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|
OC4(B, B, B, B), // 0x84-0x87
|
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|
|
OC4(B, B, B, B), // 0x88-0x8b
|
|
|
|
OC4(B, B, B, B), // 0x8c-0x8f
|
|
|
|
OC4(B, B, B, B), // 0x90-0x93
|
|
|
|
OC4(B, B, B, B), // 0x94-0x97
|
|
|
|
OC4(B, B, B, B), // 0x98-0x9b
|
|
|
|
OC4(B, B, B, B), // 0x9c-0x9f
|
|
|
|
OC4(B, B, B, B), // 0xa0-0xa3
|
|
|
|
OC4(B, B, B, B), // 0xa4-0xa7
|
|
|
|
OC4(B, B, B, B), // 0xa8-0xab
|
|
|
|
OC4(B, B, B, B), // 0xac-0xaf
|
|
|
|
|
|
|
|
OC4(B, B, B, B), // 0xb0-0xb3
|
|
|
|
OC4(B, B, B, B), // 0xb4-0xb7
|
|
|
|
OC4(B, B, B, B), // 0xb8-0xbb
|
|
|
|
OC4(B, B, B, B), // 0xbc-0xbf
|
|
|
|
|
|
|
|
OC4(B, B, B, B), // 0xc0-0xc3
|
|
|
|
OC4(B, B, B, B), // 0xc4-0xc7
|
|
|
|
OC4(B, B, B, B), // 0xc8-0xcb
|
|
|
|
OC4(B, B, B, B), // 0xcc-0xcf
|
|
|
|
|
|
|
|
OC4(B, B, B, B), // 0xd0-0xd3
|
|
|
|
OC4(B, B, B, B), // 0xd4-0xd7
|
|
|
|
OC4(B, B, B, B), // 0xd8-0xdb
|
|
|
|
OC4(B, B, B, B), // 0xdc-0xdf
|
|
|
|
|
|
|
|
OC4(B, B, B, B), // 0xe0-0xe3
|
|
|
|
OC4(B, B, B, B), // 0xe4-0xe7
|
|
|
|
OC4(B, B, B, B), // 0xe8-0xeb
|
|
|
|
OC4(B, B, B, B), // 0xec-0xef
|
|
|
|
|
|
|
|
OC4(B, B, B, B), // 0xf0-0xf3
|
|
|
|
OC4(B, B, B, B), // 0xf4-0xf7
|
2016-01-28 16:11:41 +00:00
|
|
|
OC4(B, B, B, U), // 0xf8-0xfb
|
2015-11-02 21:55:42 +00:00
|
|
|
OC4(U, U, U, U), // 0xfc-0xff
|
|
|
|
};
|
|
|
|
#undef OC4
|
|
|
|
#undef U
|
|
|
|
#undef B
|
|
|
|
#undef Q
|
|
|
|
#undef V
|
|
|
|
#undef O
|
|
|
|
|
|
|
|
uint mp_opcode_format(const byte *ip, size_t *opcode_size) {
|
|
|
|
uint f = (opcode_format_table[*ip >> 2] >> (2 * (*ip & 3))) & 3;
|
|
|
|
const byte *ip_start = ip;
|
|
|
|
if (f == MP_OPCODE_QSTR) {
|
|
|
|
ip += 3;
|
|
|
|
} else {
|
|
|
|
int extra_byte = (
|
|
|
|
*ip == MP_BC_RAISE_VARARGS
|
|
|
|
|| *ip == MP_BC_MAKE_CLOSURE
|
|
|
|
|| *ip == MP_BC_MAKE_CLOSURE_DEFARGS
|
|
|
|
#if MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE
|
|
|
|
|| *ip == MP_BC_LOAD_NAME
|
|
|
|
|| *ip == MP_BC_LOAD_GLOBAL
|
|
|
|
|| *ip == MP_BC_LOAD_ATTR
|
|
|
|
|| *ip == MP_BC_STORE_ATTR
|
|
|
|
#endif
|
|
|
|
);
|
|
|
|
ip += 1;
|
|
|
|
if (f == MP_OPCODE_VAR_UINT) {
|
|
|
|
while ((*ip++ & 0x80) != 0) {
|
|
|
|
}
|
|
|
|
} else if (f == MP_OPCODE_OFFSET) {
|
|
|
|
ip += 2;
|
|
|
|
}
|
|
|
|
ip += extra_byte;
|
|
|
|
}
|
|
|
|
*opcode_size = ip - ip_start;
|
|
|
|
return f;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif // MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE
|