/****************************************************************************
** GeomIO Library
** Copyright FougSys (2 Mar. 2015)
** contact@fougsys.fr
**
** This software is a reusable library whose purpose is to provide complete
** I/O support for various CAD file formats (eg. STL)
**
** This software is governed by the CeCILL-B license under French law and
** abiding by the rules of distribution of free software.  You can  use,
** modify and/ or redistribute the software under the terms of the CeCILL-B
** license as circulated by CEA, CNRS and INRIA at the following URL
** "http://www.cecill.info".
****************************************************************************/

#include <gmio_support/qt_stream.h>

#include <gmio_core/stream.h>

#include <QtCore/QFile>
#include <QtCore/QIODevice>

static gmio_bool_t gmio_stream_qiodevice_at_end(void* cookie)
{
  return static_cast<QIODevice*>(cookie)->atEnd();
}

static int gmio_stream_qiodevice_error(void* cookie)
{
  const QIODevice* device = static_cast<QIODevice*>(cookie);
  const QFile* file = dynamic_cast<const QFile*>(device);
  if (file != NULL) {
    return file->error();
  }
  else {
    const QString err_str = static_cast<QIODevice*>(cookie)->errorString();
    return !err_str.isEmpty() ? 1 : 0;
  }
  return 0;
}

static size_t gmio_stream_qiodevice_read(void* cookie,
                                         void* ptr,
                                         size_t item_size,
                                         size_t item_count)
{
  QIODevice* device = static_cast<QIODevice*>(cookie);
  const qint64 c = device->read(static_cast<char*>(ptr), item_size * item_count);
  return c / item_size;
}

static size_t gmio_stream_qiodevice_write(void* cookie,
                                          const void* ptr,
                                          size_t item_size,
                                          size_t item_count)
{
  QIODevice* device = static_cast<QIODevice*>(cookie);
  const qint64 c = device->write(static_cast<const char*>(ptr), item_size * item_count);
  return c / item_size;
}

void gmio_stream_set_qiodevice(gmio_stream_t* stream, QIODevice* device)
{
  stream->cookie = device;
  stream->at_end_func = gmio_stream_qiodevice_at_end;
  stream->error_func = gmio_stream_qiodevice_error;
  stream->read_func = gmio_stream_qiodevice_read;
  stream->write_func = gmio_stream_qiodevice_write;
}