Function join

src/ByteArrayUtils.h:112–144

inline QByteArray join(const QList<QByteArrayView>& parts, const QByteArray& delimiter)
{
    if (parts.isEmpty())
        return QByteArray();

    const qsizetype dlen = delimiter.size();

    // Compute total size
    qsizetype total = 0;
    for (const auto& v : parts)
        total += v.size();
    total += dlen * (parts.size() - 1);

    // Allocate final QByteArray
    QByteArray out;
    out.resize(total);

    // Copy segments
    char* dst = out.data();
    for (int i = 0; i < parts.size(); ++i) {
        const auto& v = parts[i];

        memcpy(dst, v.data(), v.size());
        dst += v.size();

        if (i + 1 < parts.size()) {
            memcpy(dst, delimiter.constData(), dlen);
            dst += dlen;
        }
    }

    return out;
}

} // namespace ByteArrayViewUtils