void NativeFile::set(Offset at, Byte const *values, Size count)
{
DENG2_GUARD(this);
QFile &out = output();
if (at > size())
{
/// @throw IByteArray::OffsetError @a at specified a position beyond the
/// end of the file.
throw OffsetError("NativeFile::set", "Cannot write past end of file");
}
out.seek(at);
out.write(reinterpret_cast<char const *>(values), count);
if (out.error() != QFile::NoError)
{
/// @throw OutputError Failure to write to the native file.
throw OutputError("NativeFile::set", "Error writing to file:" +
out.errorString());
}
// Update status.
Status st = status();
st.size = max(st.size, at + count);
st.modifiedAt = Time();
setStatus(st);
}
void FixedByteArray::set(Offset at, Byte const *values, Size count)
{
// Increasing the size is not allowed.
if (at + count > size())
{
throw OffsetError("FixedByteArray::set", "Fixed byte arrays cannot grow");
}
ByteSubArray::set(at, values, count);
}
void NativeFile::get(Offset at, Byte *values, Size count) const
{
DENG2_GUARD(this);
QFile &in = input();
if(at + count > size())
{
/// @throw IByteArray::OffsetError The region specified for reading extends
/// beyond the bounds of the file.
throw OffsetError("NativeFile::get", description() + ": cannot read past end of file " +
String("(%1[+%2] > %3)").arg(at).arg(count).arg(size()));
}
in.seek(at);
in.read(reinterpret_cast<char *>(values), count);
}
void NativeFile::get(Offset at, Byte *values, Size count) const
{
DENG2_GUARD(this);
if (at + count > size())
{
d->closeInput();
/// @throw IByteArray::OffsetError The region specified for reading extends
/// beyond the bounds of the file.
throw OffsetError("NativeFile::get", description() + ": cannot read past end of file " +
String("(%1[+%2] > %3)").arg(at).arg(count).arg(size()));
}
QFile &in = input();
if (in.pos() != qint64(at)) in.seek(qint64(at));
in.read(reinterpret_cast<char *>(values), count);
// Close the native input file after reaching the end of the file.
if (in.atEnd())
{
d->closeInput();
}
}
