package.cpp

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/*
 * Copyright (C) 2018-2024 QuasarApp.
 * Distributed under the lgplv3 software license, see the accompanying
 * Everyone is permitted to copy and distribute verbatim copies
 * of this license document, but changing it is not allowed.
*/
 
#include "package.h"
#include <crc/crchash.h>
#include <QDataStream>
 
namespace QH {
 
Package::Package() {
    Package::reset();
}
 
bool Package::isValid() const {
    if (!hdr.isValid()) {
        return false;
    }
 
    if (hdr.size != static_cast<unsigned int>(data.size())) {
        return false;
    }
 
    if (hdr.size > maximumSize())
        return false;
 
    return calcHash() == hdr.hash;
}
 
void Package::reset() {
    hdr.reset();
    data.clear();
}
 
QString Package::toString() const {
    return QString("Pakcage description: %0."
                   " Data description: Data size - %1, Data: %2").
        arg(hdr.toString()).arg(data.size()).arg(QString(data.toHex().toUpper()));
}
 
unsigned int Package::calcHash() const {
    auto tmp = data + QByteArray::number(hdr.command);
    return qa_common::hash32(tmp.constData(), tmp.size());
}
 
unsigned int Package::maximumSize() {
    return 1024 * 1024;
}
 
QDataStream &Package::fromStream(QDataStream &stream) {
    reset();
    stream.readRawData(reinterpret_cast<char*>(&hdr), sizeof(Header));
 
    char * buf = static_cast<char*>(malloc(hdr.size));
    stream.readRawData(buf, hdr.size);
    data.clear();
    data.insert(0, buf, hdr.size);
 
    free(buf);
 
    return stream;
}
 
QDataStream &Package::toStream(QDataStream &stream) const {
    stream.writeRawData(reinterpret_cast<const char*>(&hdr),
                        sizeof (hdr));
 
    stream.writeRawData(data.data(),
                        data.size());
 
    return stream;
}
 
}