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280 lines
10 KiB
C++
280 lines
10 KiB
C++
/**************************************************************************/
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/* gdscript_lambda_callable.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in 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, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "gdscript_lambda_callable.h"
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#include "gdscript.h"
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#include "core/templates/hashfuncs.h"
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bool GDScriptLambdaCallable::compare_equal(const CallableCustom *p_a, const CallableCustom *p_b) {
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// Lambda callables are only compared by reference.
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return p_a == p_b;
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}
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bool GDScriptLambdaCallable::compare_less(const CallableCustom *p_a, const CallableCustom *p_b) {
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// Lambda callables are only compared by reference.
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return p_a < p_b;
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}
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bool GDScriptLambdaCallable::is_valid() const {
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return CallableCustom::is_valid() && function != nullptr;
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}
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uint32_t GDScriptLambdaCallable::hash() const {
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return h;
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}
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String GDScriptLambdaCallable::get_as_text() const {
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if (function == nullptr) {
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return "<invalid lambda>";
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}
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if (function->get_name() != StringName()) {
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return function->get_name().operator String() + "(lambda)";
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}
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return "(anonymous lambda)";
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}
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CallableCustom::CompareEqualFunc GDScriptLambdaCallable::get_compare_equal_func() const {
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return compare_equal;
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}
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CallableCustom::CompareLessFunc GDScriptLambdaCallable::get_compare_less_func() const {
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return compare_less;
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}
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ObjectID GDScriptLambdaCallable::get_object() const {
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return script->get_instance_id();
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}
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StringName GDScriptLambdaCallable::get_method() const {
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return function->get_name();
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}
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void GDScriptLambdaCallable::call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
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int captures_amount = captures.size();
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if (function == nullptr) {
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r_return_value = Variant();
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r_call_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL;
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return;
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}
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if (captures_amount > 0) {
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Vector<const Variant *> args;
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args.resize(p_argcount + captures_amount);
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for (int i = 0; i < captures_amount; i++) {
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args.write[i] = &captures[i];
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if (captures[i].get_type() == Variant::OBJECT) {
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bool was_freed = false;
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captures[i].get_validated_object_with_check(was_freed);
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if (was_freed) {
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ERR_PRINT(vformat(R"(Lambda capture at index %d was freed. Passed "null" instead.)", i));
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static Variant nil;
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args.write[i] = &nil;
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}
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}
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}
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for (int i = 0; i < p_argcount; i++) {
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args.write[i + captures_amount] = p_arguments[i];
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}
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r_return_value = function->call(nullptr, args.ptrw(), args.size(), r_call_error);
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switch (r_call_error.error) {
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case Callable::CallError::CALL_ERROR_INVALID_ARGUMENT:
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r_call_error.argument -= captures_amount;
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#ifdef DEBUG_ENABLED
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if (r_call_error.argument < 0) {
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ERR_PRINT(vformat("GDScript bug (please report): Invalid value of lambda capture at index %d.", captures_amount + r_call_error.argument));
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r_call_error.error = Callable::CallError::CALL_ERROR_INVALID_METHOD; // TODO: Add a more suitable error code.
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r_call_error.argument = 0;
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r_call_error.expected = 0;
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}
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#endif
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break;
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case Callable::CallError::CALL_ERROR_TOO_MANY_ARGUMENTS:
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case Callable::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS:
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r_call_error.expected -= captures_amount;
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#ifdef DEBUG_ENABLED
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if (r_call_error.expected < 0) {
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ERR_PRINT("GDScript bug (please report): Invalid lambda captures count.");
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r_call_error.error = Callable::CallError::CALL_ERROR_INVALID_METHOD; // TODO: Add a more suitable error code.
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r_call_error.argument = 0;
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r_call_error.expected = 0;
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}
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#endif
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break;
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default:
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break;
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}
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} else {
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r_return_value = function->call(nullptr, p_arguments, p_argcount, r_call_error);
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}
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}
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GDScriptLambdaCallable::GDScriptLambdaCallable(Ref<GDScript> p_script, GDScriptFunction *p_function, const Vector<Variant> &p_captures) :
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function(p_function) {
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ERR_FAIL_NULL(p_script.ptr());
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ERR_FAIL_NULL(p_function);
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script = p_script;
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captures = p_captures;
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h = (uint32_t)hash_murmur3_one_64((uint64_t)this);
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}
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bool GDScriptLambdaSelfCallable::compare_equal(const CallableCustom *p_a, const CallableCustom *p_b) {
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// Lambda callables are only compared by reference.
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return p_a == p_b;
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}
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bool GDScriptLambdaSelfCallable::compare_less(const CallableCustom *p_a, const CallableCustom *p_b) {
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// Lambda callables are only compared by reference.
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return p_a < p_b;
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}
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bool GDScriptLambdaSelfCallable::is_valid() const {
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return CallableCustom::is_valid() && function != nullptr;
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}
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uint32_t GDScriptLambdaSelfCallable::hash() const {
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return h;
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}
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String GDScriptLambdaSelfCallable::get_as_text() const {
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if (function == nullptr) {
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return "<invalid lambda>";
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}
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if (function->get_name() != StringName()) {
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return function->get_name().operator String() + "(lambda)";
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}
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return "(anonymous lambda)";
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}
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CallableCustom::CompareEqualFunc GDScriptLambdaSelfCallable::get_compare_equal_func() const {
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return compare_equal;
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}
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CallableCustom::CompareLessFunc GDScriptLambdaSelfCallable::get_compare_less_func() const {
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return compare_less;
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}
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ObjectID GDScriptLambdaSelfCallable::get_object() const {
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return object->get_instance_id();
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}
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void GDScriptLambdaSelfCallable::call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
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#ifdef DEBUG_ENABLED
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if (object->get_script_instance() == nullptr || object->get_script_instance()->get_language() != GDScriptLanguage::get_singleton()) {
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ERR_PRINT("Trying to call a lambda with an invalid instance.");
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r_call_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL;
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return;
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}
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#endif
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int captures_amount = captures.size();
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if (function == nullptr) {
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r_return_value = Variant();
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r_call_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL;
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return;
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}
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if (captures_amount > 0) {
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Vector<const Variant *> args;
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args.resize(p_argcount + captures_amount);
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for (int i = 0; i < captures_amount; i++) {
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args.write[i] = &captures[i];
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if (captures[i].get_type() == Variant::OBJECT) {
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bool was_freed = false;
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captures[i].get_validated_object_with_check(was_freed);
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if (was_freed) {
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ERR_PRINT(vformat(R"(Lambda capture at index %d was freed. Passed "null" instead.)", i));
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static Variant nil;
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args.write[i] = &nil;
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}
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}
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}
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for (int i = 0; i < p_argcount; i++) {
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args.write[i + captures_amount] = p_arguments[i];
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}
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r_return_value = function->call(static_cast<GDScriptInstance *>(object->get_script_instance()), args.ptrw(), args.size(), r_call_error);
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switch (r_call_error.error) {
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case Callable::CallError::CALL_ERROR_INVALID_ARGUMENT:
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r_call_error.argument -= captures_amount;
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#ifdef DEBUG_ENABLED
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if (r_call_error.argument < 0) {
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ERR_PRINT(vformat("GDScript bug (please report): Invalid value of lambda capture at index %d.", captures_amount + r_call_error.argument));
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r_call_error.error = Callable::CallError::CALL_ERROR_INVALID_METHOD; // TODO: Add a more suitable error code.
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r_call_error.argument = 0;
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r_call_error.expected = 0;
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}
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#endif
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break;
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case Callable::CallError::CALL_ERROR_TOO_MANY_ARGUMENTS:
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case Callable::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS:
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r_call_error.expected -= captures_amount;
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#ifdef DEBUG_ENABLED
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if (r_call_error.expected < 0) {
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ERR_PRINT("GDScript bug (please report): Invalid lambda captures count.");
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r_call_error.error = Callable::CallError::CALL_ERROR_INVALID_METHOD; // TODO: Add a more suitable error code.
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r_call_error.argument = 0;
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r_call_error.expected = 0;
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}
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#endif
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break;
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default:
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break;
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}
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} else {
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r_return_value = function->call(static_cast<GDScriptInstance *>(object->get_script_instance()), p_arguments, p_argcount, r_call_error);
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}
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}
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GDScriptLambdaSelfCallable::GDScriptLambdaSelfCallable(Ref<RefCounted> p_self, GDScriptFunction *p_function, const Vector<Variant> &p_captures) :
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function(p_function) {
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ERR_FAIL_NULL(p_self.ptr());
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ERR_FAIL_NULL(p_function);
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reference = p_self;
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object = p_self.ptr();
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captures = p_captures;
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h = (uint32_t)hash_murmur3_one_64((uint64_t)this);
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}
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GDScriptLambdaSelfCallable::GDScriptLambdaSelfCallable(Object *p_self, GDScriptFunction *p_function, const Vector<Variant> &p_captures) :
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function(p_function) {
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ERR_FAIL_NULL(p_self);
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ERR_FAIL_NULL(p_function);
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object = p_self;
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captures = p_captures;
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h = (uint32_t)hash_murmur3_one_64((uint64_t)this);
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}
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