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/*************************************************************************/
/*  callable_method_pointer.cpp                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "callable_method_pointer.h"

bool CallableCustomMethodPointerBase::compare_equal(const CallableCustom *p_a, const CallableCustom *p_b) {
	const CallableCustomMethodPointerBase *a = static_cast<const CallableCustomMethodPointerBase *>(p_a);
	const CallableCustomMethodPointerBase *b = static_cast<const CallableCustomMethodPointerBase *>(p_b);

	if (a->comp_size != b->comp_size) {
		return false;
	}

	for (uint32_t i = 0; i < a->comp_size; i++) {
		if (a->comp_ptr[i] != b->comp_ptr[i]) {
			return false;
		}
	}

	return true;
}

bool CallableCustomMethodPointerBase::compare_less(const CallableCustom *p_a, const CallableCustom *p_b) {

	const CallableCustomMethodPointerBase *a = static_cast<const CallableCustomMethodPointerBase *>(p_a);
	const CallableCustomMethodPointerBase *b = static_cast<const CallableCustomMethodPointerBase *>(p_b);

	if (a->comp_size != b->comp_size) {
		return a->comp_size < b->comp_size;
	}

	for (uint32_t i = 0; i < a->comp_size; i++) {
		if (a->comp_ptr[i] == b->comp_ptr[i]) {
			continue;
		}

		return a->comp_ptr[i] < b->comp_ptr[i];
	}

	return false;
}

CallableCustom::CompareEqualFunc CallableCustomMethodPointerBase::get_compare_equal_func() const {
	return compare_equal;
}

CallableCustom::CompareLessFunc CallableCustomMethodPointerBase::get_compare_less_func() const {
	return compare_less;
}

uint32_t CallableCustomMethodPointerBase::hash() const {
	return h;
}

void CallableCustomMethodPointerBase::_setup(uint32_t *p_base_ptr, uint32_t p_ptr_size) {
	comp_ptr = p_base_ptr;
	comp_size = p_ptr_size / 4;

	// Precompute hash.
	for (uint32_t i = 0; i < comp_size; i++) {
		if (i == 0) {
			h = hash_djb2_one_32(comp_ptr[i]);
		} else {
			h = hash_djb2_one_32(comp_ptr[i], h);
		}
	}
}