mirror of
https://github.com/OpenTTD/OpenTTD
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64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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 <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file string_inplace.cpp Inplace-replacement of textual and binary data.
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*/
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#include "../stdafx.h"
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#include "string_inplace.hpp"
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#include "../safeguards.h"
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/**
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* Check whether any unused bytes are left between the Builder and Consumer position.
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*/
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[[nodiscard]] bool InPlaceBuilder::AnyBytesUnused() const noexcept
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{
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return this->consumer.GetBytesRead() > this->position;
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}
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/**
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* Get number of unused bytes left between the Builder and Consumer position.
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*/
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[[nodiscard]] InPlaceBuilder::size_type InPlaceBuilder::GetBytesUnused() const noexcept
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{
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return this->consumer.GetBytesRead() - this->position;
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}
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/**
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* Append buffer.
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*/
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void InPlaceBuilder::PutBuffer(const char *str, size_type len)
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{
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auto unused = this->GetBytesUnused();
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if (len > unused) NOT_REACHED();
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std::copy(str, str + len, this->dest.data() + this->position);
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this->position += len;
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}
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/**
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* Create coupled Consumer+Builder pair.
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* @param buffer Data to consume and replace.
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* @note The lifetime of the buffer must exceed the lifetime of both the Consumer and the Builder.
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*/
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InPlaceReplacement::InPlaceReplacement(std::span<char> buffer)
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: consumer(buffer), builder(buffer, consumer)
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{
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}
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InPlaceReplacement::InPlaceReplacement(const InPlaceReplacement &src)
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: consumer(src.consumer), builder(src.builder, consumer)
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{
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}
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InPlaceReplacement& InPlaceReplacement::operator=(const InPlaceReplacement &src)
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{
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this->consumer = src.consumer;
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this->builder.AssignBuffer(src.builder);
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return *this;
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}
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