💿🐜 Antkeeper source code
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
152 lines
3.8 KiB
152 lines
3.8 KiB
/*
|
|
* Copyright (C) 2023 Christopher J. Howard
|
|
*
|
|
* This file is part of Antkeeper source code.
|
|
*
|
|
* Antkeeper source code 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Antkeeper source code 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 Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef ANTKEEPER_RESOURCES_DESERIALIZE_CONTEXT_HPP
|
|
#define ANTKEEPER_RESOURCES_DESERIALIZE_CONTEXT_HPP
|
|
|
|
#include <cstddef>
|
|
#include <bit>
|
|
|
|
/**
|
|
* Provides access to a deserialization state.
|
|
*/
|
|
struct deserialize_context
|
|
{
|
|
public:
|
|
/**
|
|
* Reads 8-bit (byte) data.
|
|
*
|
|
* @param data Pointer to data source.
|
|
* @param count Number of bytes to read.
|
|
*
|
|
* @return Number of bytes read.
|
|
*
|
|
* @throw deserialize_error Read error.
|
|
*/
|
|
std::size_t read8(std::byte* data, std::size_t count) noexcept(false);
|
|
|
|
/**
|
|
* Reads 16-bit (word) data.
|
|
*
|
|
* @tparam Endian Endianness of the read operation.
|
|
*
|
|
* @param data Pointer to data destination.
|
|
* @param count Number of words to read.
|
|
*
|
|
* @return Number of words read.
|
|
*
|
|
* @throw deserialize_error Read error.
|
|
*/
|
|
template <std::endian Endian = std::endian::native>
|
|
inline std::size_t read16(std::byte* data, std::size_t count) noexcept(false)
|
|
{
|
|
if constexpr (Endian == std::endian::little)
|
|
{
|
|
return read16_le(data, count);
|
|
}
|
|
else
|
|
{
|
|
return read16_be(data, count);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reads 32-bit (double word) data.
|
|
*
|
|
* @tparam Endian Endianness of the read operation.
|
|
*
|
|
* @param data Pointer to data destination.
|
|
* @param count Number of double words to read.
|
|
*
|
|
* @return Number of double words read.
|
|
*
|
|
* @throw deserialize_error Read error.
|
|
*/
|
|
template <std::endian Endian = std::endian::native>
|
|
inline std::size_t read32(std::byte* data, std::size_t count) noexcept(false)
|
|
{
|
|
if constexpr (Endian == std::endian::little)
|
|
{
|
|
return read32_le(data, count);
|
|
}
|
|
else
|
|
{
|
|
return read32_be(data, count);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reads 64-bit (quad word) data.
|
|
*
|
|
* @tparam Endian Endianness of the read operation.
|
|
*
|
|
* @param data Pointer to data destination.
|
|
* @param count Number of quad words to read.
|
|
*
|
|
* @return Number of quad words read.
|
|
*
|
|
* @throw deserialize_error Read error.
|
|
*/
|
|
template <std::endian Endian = std::endian::native>
|
|
inline std::size_t read64(std::byte* data, std::size_t count) noexcept(false)
|
|
{
|
|
if constexpr (Endian == std::endian::little)
|
|
{
|
|
return read64_le(data, count);
|
|
}
|
|
else
|
|
{
|
|
return read64_be(data, count);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns `true` if the end of a file was reached.
|
|
*/
|
|
inline bool eof() const noexcept
|
|
{
|
|
return m_eof;
|
|
}
|
|
|
|
/**
|
|
* Returns `true` if an error occured during a read operation, `false` otherwise.
|
|
*/
|
|
inline bool error() const noexcept
|
|
{
|
|
return m_error;
|
|
}
|
|
|
|
private:
|
|
template <class T>
|
|
friend class resource_loader;
|
|
|
|
deserialize_context(void* handle);
|
|
std::size_t read16_le(std::byte* data, std::size_t count) noexcept(false);
|
|
std::size_t read16_be(std::byte* data, std::size_t count) noexcept(false);
|
|
std::size_t read32_le(std::byte* data, std::size_t count) noexcept(false);
|
|
std::size_t read32_be(std::byte* data, std::size_t count) noexcept(false);
|
|
std::size_t read64_le(std::byte* data, std::size_t count) noexcept(false);
|
|
std::size_t read64_be(std::byte* data, std::size_t count) noexcept(false);
|
|
|
|
void* handle;
|
|
bool m_eof;
|
|
bool m_error;
|
|
};
|
|
|
|
#endif // ANTKEEPER_RESOURCES_DESERIALIZE_CONTEXT_HPP
|