#include <qpdf/Pl_Count.hh>

#include <qpdf/QIntC.hh>

class Pl_Count::Members

{

  public:

    Members() = default;

    Members(Members const&) = delete;

    ~Members() = default;

    // Must be qpdf_offset_t, not size_t, to handle writing more than size_t can handle.

    qpdf_offset_t count{0};

    unsigned char last_char{'\0'};

};

Pl_Count::Pl_Count(char const* identifier, Pipeline* next) :

    Pipeline(identifier, next),

    m(std::make_unique<Members>())

{

    if (!next) {

        throw std::logic_error("Attempt to create Pl_Count with nullptr as next");

    }

}

Pl_Count::~Pl_Count() // NOLINT (modernize-use-equals-default)

{

    // Must be explicit and not inline -- see QPDF_DLL_CLASS in README-maintainer

}

void

Pl_Count::write(unsigned char const* buf, size_t len)

{

    if (len) {

        m->count += QIntC::to_offset(len);

        m->last_char = buf[len - 1];

        next()->write(buf, len);

    }

}

void

Pl_Count::finish()

{

    next()->finish();

}

qpdf_offset_t

Pl_Count::getCount() const

{

    return m->count;

}

unsigned char

Pl_Count::getLastChar() const

{

    return m->last_char;

}