string_inplace.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD 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 OpenTTD. If not, see <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#include "../stdafx.h"
#include "string_inplace.hpp"
#include "../safeguards.h"

[[nodiscard]] bool InPlaceBuilder::AnyBytesUnused() const noexcept
{
  return this->consumer.GetBytesRead() > this->position;
}

[[nodiscard]] InPlaceBuilder::size_type InPlaceBuilder::GetBytesUnused() const noexcept
{
  return this->consumer.GetBytesRead() - this->position;
}

void InPlaceBuilder::PutBuffer(std::span<const char> str)
{
  auto unused = this->GetBytesUnused();
  if (str.size() > unused) NOT_REACHED();
  std::ranges::copy(str, this->dest.data() + this->position);
  this->position += str.size();
}

InPlaceReplacement::InPlaceReplacement(std::span<char> buffer)
  : consumer(buffer), builder(buffer, consumer)
{
}

InPlaceReplacement::InPlaceReplacement(const InPlaceReplacement &src)
  : consumer(src.consumer), builder(src.builder, consumer)
{
}
 
InPlaceReplacement& InPlaceReplacement::operator=(const InPlaceReplacement &src)
{
  this->consumer = src.consumer;
  this->builder.AssignBuffer(src.builder);
  return *this;
}