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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2020 Blender Foundation.
* All rights reserved.
*/
#include "dupli_parent_finder.hh"
#include <climits>
#include <cstring>
#include <ostream>
#include <sstream>
namespace blender::io {
PersistentID::PersistentID()
{
persistent_id_[0] = INT_MAX;
}
PersistentID::PersistentID(const DupliObject *dupli_ob)
{
for (int index = 0; index < array_length_; ++index) {
persistent_id_[index] = dupli_ob->persistent_id[index];
}
}
PersistentID::PersistentID(const PIDArray &persistent_id_values)
{
persistent_id_ = persistent_id_values;
}
bool PersistentID::is_from_same_instancer_as(const PersistentID &other) const
{
if (persistent_id_[0] == INT_MAX || other.persistent_id_[0] == INT_MAX) {
/* Either one or the other is not instanced at all, so definitely not from the same instancer.
*/
return false;
}
/* Start at index 1 to skip the first digit. */
for (int index = 1; index < array_length_; ++index) {
const int pid_digit_a = persistent_id_[index];
const int pid_digit_b = other.persistent_id_[index];
if (pid_digit_a != pid_digit_b) {
return false;
}
if (pid_digit_a == INT_MAX) {
/* Both persistent IDs were identical so far, and this marks the end of the useful data. */
break;
}
}
return true;
}
PersistentID PersistentID::instancer_pid() const
{
if (persistent_id_[0] == INT_MAX) {
return PersistentID();
}
/* Left-shift the entire PID by 1. */
PIDArray new_pid_values;
int index;
for (index = 0; index < array_length_ - 1; ++index) {
new_pid_values[index] = persistent_id_[index + 1];
}
new_pid_values[index] = INT_MAX;
return PersistentID(new_pid_values);
}
std::string PersistentID::as_object_name_suffix() const
{
std::stringstream stream;
/* Find one past the last index. */
int index;
for (index = 0; index < array_length_ && persistent_id_[index] < INT_MAX; ++index) {
;
}
/* Iterate backward to construct the string. */
--index;
for (; index >= 0; --index) {
stream << persistent_id_[index];
if (index > 0) {
stream << "-";
}
}
return stream.str();
}
bool operator<(const PersistentID &persistent_id_a, const PersistentID &persistent_id_b)
{
const PersistentID::PIDArray &pid_a = persistent_id_a.persistent_id_;
const PersistentID::PIDArray &pid_b = persistent_id_b.persistent_id_;
for (int index = 0; index < PersistentID::array_length_; ++index) {
const int pid_digit_a = pid_a[index];
const int pid_digit_b = pid_b[index];
if (pid_digit_a != pid_digit_b) {
return pid_digit_a < pid_digit_b;
}
if (pid_a[index] == INT_MAX) {
break;
}
}
/* Both Persistent IDs were equal, so not less-than. */
return false;
}
bool operator==(const PersistentID &persistent_id_a, const PersistentID &persistent_id_b)
{
const PersistentID::PIDArray &pid_a = persistent_id_a.persistent_id_;
const PersistentID::PIDArray &pid_b = persistent_id_b.persistent_id_;
for (int index = 0; index < PersistentID::array_length_; ++index) {
const int pid_digit_a = pid_a[index];
const int pid_digit_b = pid_b[index];
if (pid_digit_a != pid_digit_b) {
return false;
}
if (pid_a[index] == INT_MAX) {
break;
}
}
return true;
}
std::ostream &operator<<(std::ostream &os, const PersistentID &persistent_id)
{
if (persistent_id.persistent_id_[0] == INT_MAX) {
return os;
}
const PersistentID::PIDArray &pid_array = persistent_id.persistent_id_;
for (int index = 0; index < PersistentID::array_length_ && pid_array[index] < INT_MAX; ++index) {
if (index > 0) {
os << "-";
}
os << pid_array[index];
}
return os;
}
} // namespace blender::io
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