#include <qpdf/qpdf-config.h> // include first for large file support

#include <qpdf/Pl_StdioFile.hh>

#include <qpdf/QUtil.hh>

#include <qpdf/Util.hh>

#include <cerrno>

#include <stdexcept>

using namespace qpdf;

class Pl_StdioFile::Members

{

  public:

    Members(FILE* f) :

        file(f)

    {

    }

    Members(Members const&) = delete;

    ~Members() = default;

    FILE* file;

};

Pl_StdioFile::Pl_StdioFile(char const* identifier, FILE* f) :

    Pipeline(identifier, nullptr),

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

{

}

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

Pl_StdioFile::~Pl_StdioFile() = default;

void

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

{

    size_t so_far = 0;

    while (len > 0) {

        so_far = fwrite(buf, 1, len, m->file);

        if (so_far == 0) {

            QUtil::throw_system_error(this->identifier + ": Pl_StdioFile::write");

        } else {

            buf += so_far;

            len -= so_far;

        }

    }

}

void

Pl_StdioFile::finish()

{

    util::assertion(

        !(fflush(m->file) == -1 && errno == EBADF),

        identifier + ": Pl_StdioFile::finish: stream already closed");

}