#include <qpdf/QPDFSystemError.hh>

#include <cstring>

QPDFSystemError::QPDFSystemError(std::string const& description, int system_errno) :

    std::runtime_error(createWhat(description, system_errno)),

    description(description),

    system_errno(system_errno)

{

}

std::string

QPDFSystemError::createWhat(std::string const& description, int system_errno)

{

    std::string message;

#ifdef _MSC_VER

    // "94" is mentioned in the MSVC docs, but it's still safe if the

    // message is longer.  strerror_s is a templated function that

    // knows the size of buf and truncates.

    char buf[94];

    if (strerror_s(buf, system_errno) != 0) {

        message = description + ": failed with an unknown error";

    } else {

        message = description + ": " + buf;

    }

#else

    message = description + ": " + strerror(system_errno);

#endif

    return message;

}

std::string const&

QPDFSystemError::getDescription() const

{

    return this->description;

}

int

QPDFSystemError::getErrno() const

{

    return this->system_errno;

}