MassBuilderSaveTool/src/UESaveFile/BinaryReader.cpp

// MassBuilderSaveTool
// Copyright (C) 2021 Guillaume Jacquemin
//
// 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 3 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, see <https://www.gnu.org/licenses/>.

#include <cstring>

#include <string>

#include "BinaryReader.h"

BinaryReader::BinaryReader(const std::string& filename) {
    _file = std::fopen(filename.c_str(), "rb");

    if(!_file) {
        Utility::Error{} << "Couldn't open" << filename.c_str() << "for reading:\n"
                         << std::strerror(errno);
    }
}

BinaryReader::~BinaryReader() {
    closeFile();
}

auto BinaryReader::open() -> bool {
    return _file;
}

auto BinaryReader::eof() -> bool {
    return std::feof(_file) != 0;
}

auto BinaryReader::position() -> Long {
    return _ftelli64(_file);
}

void BinaryReader::closeFile() {
    std::fclose(_file);
    _file = nullptr;
}

auto BinaryReader::readChar(char& value) -> bool {
    return std::fread(&value, sizeof(char), 1, _file) == 1;
}

auto BinaryReader::readByte(Byte& value) -> bool {
    return std::fread(&value, sizeof(Byte), 1, _file) == 1;
}

auto BinaryReader::readUnsignedByte(UnsignedByte& value) -> bool {
    return std::fread(&value, sizeof(UnsignedByte), 1, _file) == 1;
}

auto BinaryReader::readShort(Short& value) -> bool {
    return std::fread(&value, sizeof(Short), 1, _file) == 1;
}

auto BinaryReader::readUnsignedShort(UnsignedShort& value) -> bool {
    return std::fread(&value, sizeof(UnsignedShort), 1, _file) == 1;
}

auto BinaryReader::readInt(Int& value) -> bool {
    return std::fread(&value, sizeof(Int), 1, _file) == 1;
}

auto BinaryReader::readUnsignedInt(UnsignedInt& value) -> bool {
    return std::fread(&value, sizeof(UnsignedInt), 1, _file) == 1;
}

auto BinaryReader::readLong(Long& value) -> bool {
    return std::fread(&value, sizeof(Long), 1, _file) == 1;
}

auto BinaryReader::readUnsignedLong(UnsignedLong& value) -> bool {
    return std::fread(&value, sizeof(UnsignedLong), 1, _file) == 1;
}

auto BinaryReader::readFloat(Float& value) -> bool {
    return std::fread(&value, sizeof(Float), 1, _file) == 1;
}

auto BinaryReader::readDouble(Double& value) -> bool {
    return std::fread(&value, sizeof(Double), 1, _file) == 1;
}

auto BinaryReader::readArray(Containers::Array<char>& array, std::size_t count) -> bool {
    if(array.size() < count) {
        array = Containers::Array<char>{ValueInit, count};
    }

    return std::fread(array.data(), sizeof(char), count, _file) == count;
}

auto BinaryReader::readUEString(std::string& str) -> bool {
    UnsignedInt length = 0;
    if(!readUnsignedInt(length) || length == 0) {
        return false;
    }

    str = std::string{};
    str.resize(length - 1);

    return std::fread(&str[0], sizeof(char), length, _file) == length;
}

auto BinaryReader::peekChar() -> Int {
    Int c;
    c = std::fgetc(_file);
    std::ungetc(c, _file);
    return c;
}