physfs-serialize-context.cpp

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/*
 * 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/>.
 */
 
#include <engine/resources/physfs/physfs-serialize-context.hpp>
#include <engine/resources/serialize-error.hpp>
 
physfs_serialize_context::physfs_serialize_context(const std::filesystem::path& path)
{
    // Open file for writing using PhysicsFS
    file = PHYSFS_openWrite(path.string().c_str());
    if (!file)
    {
        throw serialize_error(PHYSFS_getLastError());
    }
    
    // Store file path
    m_path = path;
    
    // Set error flag if file not open.
    m_error = !file;
}
 
physfs_serialize_context::~physfs_serialize_context()
{
    if (file)
    {
        PHYSFS_close(file);
    }
}
 
void physfs_serialize_context::open(const std::filesystem::path& path)
{
    // Close file, if open
    if (file)
    {
        PHYSFS_close(file);
    }
    
    // Open file for writing using PhysicsFS
    file = PHYSFS_openWrite(path.string().c_str());
    if (!file)
    {
        throw serialize_error(PHYSFS_getLastError());
    }
    
    // Store file path
    m_path = path;
    
    // Set error flag if file not open.
    m_error = !file;
}
 
void physfs_serialize_context::close() noexcept
{
    if (file)
    {
        m_error = !PHYSFS_close(file);
        file = nullptr;
        m_path.clear();
    }
}
 
bool physfs_serialize_context::is_open() const noexcept
{
    return file;
}
 
const std::filesystem::path& physfs_serialize_context::path() const noexcept
{
    return m_path;
}
 
bool physfs_serialize_context::error() const noexcept
{
    return m_error;
}
 
std::size_t physfs_serialize_context::write8(const std::byte* data, std::size_t count)
{
    const PHYSFS_sint64 status = PHYSFS_writeBytes(file, data, count);
    
    if (status < 0)
    {
        m_error = true;
        throw serialize_error(PHYSFS_getLastError());
        //return 0;
    }
    
    if (status != count)
    {
        m_error = true;
        throw serialize_error(PHYSFS_getLastError());
        //return static_cast<std::size_t>(count);
    }
    
    return count;
}
 
std::size_t physfs_serialize_context::write16_le(const std::byte* data, std::size_t count)
{
    const PHYSFS_uint16* data16 = reinterpret_cast<const PHYSFS_uint16*>(data);
    
    for (std::size_t i = 0; i < count; ++i)
    {
        if (!PHYSFS_writeULE16(file, *data16))
        {
            m_error = true;
            throw serialize_error(PHYSFS_getLastError());
            //return i;
        }
        
        ++data16;
    }
    
    return count;
}
 
std::size_t physfs_serialize_context::write16_be(const std::byte* data, std::size_t count)
{
    const PHYSFS_uint16* data16 = reinterpret_cast<const PHYSFS_uint16*>(data);
    
    for (std::size_t i = 0; i < count; ++i)
    {
        if (!PHYSFS_writeUBE16(file, *data16))
        {
            m_error = true;
            throw serialize_error(PHYSFS_getLastError());
            //return i;
        }
        
        ++data16;
    }
    
    return count;
}
 
std::size_t physfs_serialize_context::write32_le(const std::byte* data, std::size_t count)
{
    const PHYSFS_uint32* data32 = reinterpret_cast<const PHYSFS_uint32*>(data);
    
    for (std::size_t i = 0; i < count; ++i)
    {
        if (!PHYSFS_writeULE32(file, *data32))
        {
            m_error = true;
            throw serialize_error(PHYSFS_getLastError());
            //return i;
        }
        
        ++data32;
    }
    
    return count;
}
 
std::size_t physfs_serialize_context::write32_be(const std::byte* data, std::size_t count)
{
    const PHYSFS_uint32* data32 = reinterpret_cast<const PHYSFS_uint32*>(data);
    
    for (std::size_t i = 0; i < count; ++i)
    {
        if (!PHYSFS_writeUBE32(file, *data32))
        {
            m_error = true;
            throw serialize_error(PHYSFS_getLastError());
            //return i;
        }
        
        ++data32;
    }
    
    return count;
}
 
std::size_t physfs_serialize_context::write64_le(const std::byte* data, std::size_t count)
{
    const PHYSFS_uint64* data64 = reinterpret_cast<const PHYSFS_uint64*>(data);
    
    for (std::size_t i = 0; i < count; ++i)
    {
        if (!PHYSFS_writeULE64(file, *data64))
        {
            m_error = true;
            throw serialize_error(PHYSFS_getLastError());
            //return i;
        }
        
        ++data64;
    }
    
    return count;
}
 
std::size_t physfs_serialize_context::write64_be(const std::byte* data, std::size_t count)
{
    const PHYSFS_uint64* data64 = reinterpret_cast<const PHYSFS_uint64*>(data);
    
    for (std::size_t i = 0; i < count; ++i)
    {
        if (!PHYSFS_writeUBE64(file, *data64))
        {
            m_error = true;
            throw serialize_error(PHYSFS_getLastError());
            //return i;
        }
        
        ++data64;
    }
    
    return count;
}