419 lines
14 KiB
C
419 lines
14 KiB
C
/*
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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) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include "mpconfig.h"
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#include "nlr.h"
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#include "misc.h"
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#include "qstr.h"
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#include "obj.h"
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#include "runtime0.h"
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#include "runtime.h"
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#include "stackctrl.h"
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mp_obj_type_t *mp_obj_get_type(mp_const_obj_t o_in) {
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if (MP_OBJ_IS_SMALL_INT(o_in)) {
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return (mp_obj_t)&mp_type_int;
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} else if (MP_OBJ_IS_QSTR(o_in)) {
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return (mp_obj_t)&mp_type_str;
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} else {
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const mp_obj_base_t *o = o_in;
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return (mp_obj_t)o->type;
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}
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}
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const char *mp_obj_get_type_str(mp_const_obj_t o_in) {
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return qstr_str(mp_obj_get_type(o_in)->name);
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}
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void printf_wrapper(void *env, const char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vprintf(fmt, args);
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va_end(args);
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}
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void mp_obj_print_helper(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
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// There can be data structures nested too deep, or just recursive
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MP_STACK_CHECK();
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#if !NDEBUG
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if (o_in == NULL) {
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print(env, "(nil)");
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return;
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}
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#endif
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mp_obj_type_t *type = mp_obj_get_type(o_in);
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if (type->print != NULL) {
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type->print(print, env, o_in, kind);
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} else {
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print(env, "<%s>", qstr_str(type->name));
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}
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}
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void mp_obj_print(mp_obj_t o_in, mp_print_kind_t kind) {
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mp_obj_print_helper(printf_wrapper, NULL, o_in, kind);
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}
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// helper function to print an exception with traceback
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void mp_obj_print_exception(mp_obj_t exc) {
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if (mp_obj_is_exception_instance(exc)) {
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machine_uint_t n, *values;
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mp_obj_exception_get_traceback(exc, &n, &values);
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if (n > 0) {
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assert(n % 3 == 0);
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printf("Traceback (most recent call last):\n");
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for (int i = n - 3; i >= 0; i -= 3) {
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#if MICROPY_ENABLE_SOURCE_LINE
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printf(" File \"%s\", line %d", qstr_str(values[i]), (int)values[i + 1]);
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#else
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printf(" File \"%s\"", qstr_str(values[i]));
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#endif
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// the block name can be NULL if it's unknown
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qstr block = values[i + 2];
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if (block == MP_QSTR_NULL) {
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printf("\n");
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} else {
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printf(", in %s\n", qstr_str(block));
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}
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}
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}
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}
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mp_obj_print(exc, PRINT_EXC);
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printf("\n");
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}
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int mp_obj_is_true(mp_obj_t arg) {
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if (arg == mp_const_false) {
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return 0;
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} else if (arg == mp_const_true) {
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return 1;
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} else if (arg == mp_const_none) {
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return 0;
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} else if (MP_OBJ_IS_SMALL_INT(arg)) {
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if (MP_OBJ_SMALL_INT_VALUE(arg) == 0) {
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return 0;
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} else {
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return 1;
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}
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} else {
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mp_obj_type_t *type = mp_obj_get_type(arg);
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if (type->unary_op != NULL) {
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mp_obj_t result = type->unary_op(MP_UNARY_OP_BOOL, arg);
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if (result != MP_OBJ_NULL) {
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return result == mp_const_true;
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}
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}
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mp_obj_t len = mp_obj_len_maybe(arg);
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if (len != MP_OBJ_NULL) {
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// obj has a length, truth determined if len != 0
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return len != MP_OBJ_NEW_SMALL_INT(0);
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} else {
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// any other obj is true per Python semantics
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return 1;
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}
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}
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}
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bool mp_obj_is_callable(mp_obj_t o_in) {
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return mp_obj_get_type(o_in)->call != NULL;
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}
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machine_int_t mp_obj_hash(mp_obj_t o_in) {
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if (o_in == mp_const_false) {
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return 0; // needs to hash to same as the integer 0, since False==0
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} else if (o_in == mp_const_true) {
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return 1; // needs to hash to same as the integer 1, since True==1
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} else if (MP_OBJ_IS_SMALL_INT(o_in)) {
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return MP_OBJ_SMALL_INT_VALUE(o_in);
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} else if (MP_OBJ_IS_STR(o_in) || MP_OBJ_IS_TYPE(o_in, &mp_type_bytes)) {
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return mp_obj_str_get_hash(o_in);
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} else if (MP_OBJ_IS_TYPE(o_in, &mp_type_NoneType)) {
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return (machine_int_t)o_in;
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} else if (MP_OBJ_IS_TYPE(o_in, &mp_type_fun_native) || MP_OBJ_IS_TYPE(o_in, &mp_type_fun_bc)) {
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return (machine_int_t)o_in;
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} else if (MP_OBJ_IS_TYPE(o_in, &mp_type_tuple)) {
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return mp_obj_tuple_hash(o_in);
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} else if (MP_OBJ_IS_TYPE(o_in, &mp_type_type)) {
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return (machine_int_t)o_in;
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// TODO hash class and instances
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// TODO delegate to __hash__ method if it exists
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} else {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "unhashable type: '%s'", mp_obj_get_type_str(o_in)));
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}
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}
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// this function implements the '==' operator (and so the inverse of '!=')
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// from the python language reference:
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// "The objects need not have the same type. If both are numbers, they are converted
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// to a common type. Otherwise, the == and != operators always consider objects of
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// different types to be unequal."
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// note also that False==0 and True==1 are true expressions
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bool mp_obj_equal(mp_obj_t o1, mp_obj_t o2) {
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if (o1 == o2) {
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return true;
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}
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if (o1 == mp_const_none || o2 == mp_const_none) {
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return false;
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}
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// fast path for small ints
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if (MP_OBJ_IS_SMALL_INT(o1)) {
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if (MP_OBJ_IS_SMALL_INT(o2)) {
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// both SMALL_INT, and not equal if we get here
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return false;
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} else {
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mp_obj_t temp = o2; o2 = o1; o1 = temp;
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// o2 is now the SMALL_INT, o1 is not
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// fall through to generic op
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}
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}
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// fast path for strings
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if (MP_OBJ_IS_STR(o1)) {
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if (MP_OBJ_IS_STR(o2)) {
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// both strings, use special function
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return mp_obj_str_equal(o1, o2);
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} else {
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// a string is never equal to anything else
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return false;
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}
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} else if (MP_OBJ_IS_STR(o2)) {
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// o1 is not a string (else caught above), so the objects are not equal
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return false;
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}
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// generic type, call binary_op(MP_BINARY_OP_EQUAL)
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mp_obj_type_t *type = mp_obj_get_type(o1);
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if (type->binary_op != NULL) {
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mp_obj_t r = type->binary_op(MP_BINARY_OP_EQUAL, o1, o2);
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if (r != MP_OBJ_NULL) {
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return r == mp_const_true ? true : false;
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}
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}
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_NotImplementedError,
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"Equality for '%s' and '%s' types not yet implemented", mp_obj_get_type_str(o1), mp_obj_get_type_str(o2)));
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return false;
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}
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machine_int_t mp_obj_get_int(mp_const_obj_t arg) {
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// This function essentially performs implicit type conversion to int
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// Note that Python does NOT provide implicit type conversion from
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// float to int in the core expression language, try some_list[1.0].
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if (arg == mp_const_false) {
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return 0;
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} else if (arg == mp_const_true) {
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return 1;
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} else if (MP_OBJ_IS_SMALL_INT(arg)) {
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return MP_OBJ_SMALL_INT_VALUE(arg);
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} else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) {
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return mp_obj_int_get_checked(arg);
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} else {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "can't convert %s to int", mp_obj_get_type_str(arg)));
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}
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}
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// returns false if arg is not of integral type
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// returns true and sets *value if it is of integral type
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// can throw OverflowError if arg is of integral type, but doesn't fit in a machine_int_t
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bool mp_obj_get_int_maybe(mp_const_obj_t arg, machine_int_t *value) {
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if (arg == mp_const_false) {
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*value = 0;
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} else if (arg == mp_const_true) {
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*value = 1;
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} else if (MP_OBJ_IS_SMALL_INT(arg)) {
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*value = MP_OBJ_SMALL_INT_VALUE(arg);
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} else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) {
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*value = mp_obj_int_get_checked(arg);
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} else {
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return false;
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}
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return true;
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}
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#if MICROPY_PY_BUILTINS_FLOAT
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mp_float_t mp_obj_get_float(mp_obj_t arg) {
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if (arg == mp_const_false) {
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return 0;
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} else if (arg == mp_const_true) {
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return 1;
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} else if (MP_OBJ_IS_SMALL_INT(arg)) {
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return MP_OBJ_SMALL_INT_VALUE(arg);
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} else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) {
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return mp_obj_int_as_float(arg);
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} else if (MP_OBJ_IS_TYPE(arg, &mp_type_float)) {
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return mp_obj_float_get(arg);
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} else {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "can't convert %s to float", mp_obj_get_type_str(arg)));
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}
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}
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#if MICROPY_PY_BUILTINS_COMPLEX
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void mp_obj_get_complex(mp_obj_t arg, mp_float_t *real, mp_float_t *imag) {
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if (arg == mp_const_false) {
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*real = 0;
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*imag = 0;
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} else if (arg == mp_const_true) {
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*real = 1;
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*imag = 0;
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} else if (MP_OBJ_IS_SMALL_INT(arg)) {
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*real = MP_OBJ_SMALL_INT_VALUE(arg);
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*imag = 0;
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} else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) {
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*real = mp_obj_int_as_float(arg);
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*imag = 0;
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} else if (MP_OBJ_IS_TYPE(arg, &mp_type_float)) {
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*real = mp_obj_float_get(arg);
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*imag = 0;
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} else if (MP_OBJ_IS_TYPE(arg, &mp_type_complex)) {
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mp_obj_complex_get(arg, real, imag);
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} else {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "can't convert %s to complex", mp_obj_get_type_str(arg)));
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}
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}
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#endif
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#endif
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void mp_obj_get_array(mp_obj_t o, uint *len, mp_obj_t **items) {
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if (MP_OBJ_IS_TYPE(o, &mp_type_tuple)) {
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mp_obj_tuple_get(o, len, items);
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} else if (MP_OBJ_IS_TYPE(o, &mp_type_list)) {
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mp_obj_list_get(o, len, items);
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} else {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "object '%s' is not a tuple or list", mp_obj_get_type_str(o)));
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}
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}
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void mp_obj_get_array_fixed_n(mp_obj_t o, uint len, mp_obj_t **items) {
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if (MP_OBJ_IS_TYPE(o, &mp_type_tuple) || MP_OBJ_IS_TYPE(o, &mp_type_list)) {
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uint seq_len;
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if (MP_OBJ_IS_TYPE(o, &mp_type_tuple)) {
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mp_obj_tuple_get(o, &seq_len, items);
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} else {
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mp_obj_list_get(o, &seq_len, items);
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}
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if (seq_len != len) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "requested length %d but object has length %d", len, seq_len));
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}
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} else {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "object '%s' is not a tuple or list", mp_obj_get_type_str(o)));
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}
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}
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// is_slice determines whether the index is a slice index
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uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index, bool is_slice) {
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machine_int_t i;
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if (MP_OBJ_IS_SMALL_INT(index)) {
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i = MP_OBJ_SMALL_INT_VALUE(index);
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} else if (!mp_obj_get_int_maybe(index, &i)) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "%s indices must be integers, not %s", qstr_str(type->name), mp_obj_get_type_str(index)));
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}
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if (i < 0) {
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i += len;
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}
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if (is_slice) {
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if (i < 0) {
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i = 0;
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} else if (i > len) {
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i = len;
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}
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} else {
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if (i < 0 || i >= len) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "%s index out of range", qstr_str(type->name)));
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}
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}
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return i;
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}
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// may return MP_OBJ_NULL
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mp_obj_t mp_obj_len_maybe(mp_obj_t o_in) {
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if (
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#if !MICROPY_PY_BUILTINS_STR_UNICODE
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// It's simple - unicode is slow, non-unicode is fast
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MP_OBJ_IS_STR(o_in) ||
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#endif
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MP_OBJ_IS_TYPE(o_in, &mp_type_bytes)) {
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return MP_OBJ_NEW_SMALL_INT((machine_int_t)mp_obj_str_get_len(o_in));
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} else {
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mp_obj_type_t *type = mp_obj_get_type(o_in);
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if (type->unary_op != NULL) {
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return type->unary_op(MP_UNARY_OP_LEN, o_in);
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} else {
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return MP_OBJ_NULL;
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}
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}
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}
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mp_obj_t mp_obj_subscr(mp_obj_t base, mp_obj_t index, mp_obj_t value) {
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mp_obj_type_t *type = mp_obj_get_type(base);
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if (type->subscr != NULL) {
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mp_obj_t ret = type->subscr(base, index, value);
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if (ret != MP_OBJ_NULL) {
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return ret;
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}
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// TODO: call base classes here?
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}
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if (value == MP_OBJ_NULL) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'%s' object does not support item deletion", mp_obj_get_type_str(base)));
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} else if (value == MP_OBJ_SENTINEL) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'%s' object is not subscriptable", mp_obj_get_type_str(base)));
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} else {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'%s' object does not support item assignment", mp_obj_get_type_str(base)));
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}
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}
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// Return input argument. Useful as .getiter for objects which are
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// their own iterators, etc.
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mp_obj_t mp_identity(mp_obj_t self) {
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return self;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(mp_identity_obj, mp_identity);
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bool mp_get_buffer(mp_obj_t obj, mp_buffer_info_t *bufinfo, int flags) {
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mp_obj_type_t *type = mp_obj_get_type(obj);
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if (type->buffer_p.get_buffer == NULL) {
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return false;
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}
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int ret = type->buffer_p.get_buffer(obj, bufinfo, flags);
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if (ret != 0 || bufinfo->buf == NULL) {
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return false;
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}
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return true;
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}
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void mp_get_buffer_raise(mp_obj_t obj, mp_buffer_info_t *bufinfo, int flags) {
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if (!mp_get_buffer(obj, bufinfo, flags)) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "object with buffer protocol required"));
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}
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}
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