% /*!
%  * \file gps_l1_ca_pvt_read_pvt_dump.m
%  * \brief Read GNSS-SDR PVT lib dump binary file into MATLAB. The resulting
%  structure is compatible with the K.Borre MATLAB-based receiver.
%  * \author Javier Arribas, 2011. jarribas(at)cttc.es
%  * -------------------------------------------------------------------------
%  *
%  * Copyright (C) 2010-2011  (see AUTHORS file for a list of contributors)
%  *
%  * GNSS-SDR is a software defined Global Navigation
%  *          Satellite Systems receiver
%  *
%  * This file is part of GNSS-SDR.
%  *
%  * GNSS-SDR is free software: you can redistribute it and/or modify
%  * it under the terms of the GNU General Public License as published by
%  * the Free Software Foundation, either version 3 of the License, or
%  * at your option) any later version.
%  *
%  * GNSS-SDR is distributed in the hope that it will be useful,
%  * but WITHOUT ANY WARRANTY; without even the implied warranty of
%  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%  * GNU General Public License for more details.
%  *
%  * You should have received a copy of the GNU General Public License
%  * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
%  *
%  * -------------------------------------------------------------------------
%  */        
function [navSolutions] = gps_l1_ca_pvt_read_pvt_dump (filename, count)

  %% usage: gps_l1_ca_pvt_read_pvt_dump (filename, [count])
  %%
  %% open GNSS-SDR PVT binary log file .dat and return the contents
  %%
% 
% //  PVT GPS time
% tmp_double=GPS_current_time;
% d_dump_file.write((char*)&tmp_double, sizeof(double));
% // ECEF User Position East [m]
% tmp_double=mypos(0);
% d_dump_file.write((char*)&tmp_double, sizeof(double));
% // ECEF User Position North [m]
% tmp_double=mypos(1);
% d_dump_file.write((char*)&tmp_double, sizeof(double));
% // ECEF User Position Up [m]
% tmp_double=mypos(2);
% d_dump_file.write((char*)&tmp_double, sizeof(double));
% // User clock offset [s]
% tmp_double=mypos(3);
% d_dump_file.write((char*)&tmp_double, sizeof(double));
% // GEO user position Latitude [deg]
% tmp_double=d_latitude_d;
% d_dump_file.write((char*)&tmp_double, sizeof(double));
% // GEO user position Longitude [deg]
% tmp_double=d_longitude_d;
% d_dump_file.write((char*)&tmp_double, sizeof(double));
% // GEO user position Height [m]
% tmp_double=d_height_m;
% d_dump_file.write((char*)&tmp_double, sizeof(double));
                
  m = nargchk (1,2,nargin);
  num_double_vars=8;
  double_size_bytes=8;
  skip_bytes_each_read=double_size_bytes*num_double_vars;
  bytes_shift=0;
  if (m)
    usage (m);
  end

  if (nargin < 3)
    count = Inf;
  end
    %loops_counter = fread (f, count, 'uint32',4*12);
  f = fopen (filename, 'rb');
  if (f < 0)
  else
        GPS_current_time = fread (f, count, 'float64',skip_bytes_each_read-double_size_bytes);
        bytes_shift=bytes_shift+double_size_bytes;
        fseek(f,bytes_shift,'bof'); % move to next interleaved
        ECEF_X = fread (f, count, 'float64',skip_bytes_each_read-double_size_bytes);
        bytes_shift=bytes_shift+double_size_bytes;
        fseek(f,bytes_shift,'bof'); % move to next interleaved
        ECEF_Y = fread (f, count, 'float64',skip_bytes_each_read-double_size_bytes);
        bytes_shift=bytes_shift+double_size_bytes;
        fseek(f,bytes_shift,'bof'); % move to next interleaved
        ECEF_Z = fread (f, count, 'float64',skip_bytes_each_read-double_size_bytes);
        bytes_shift=bytes_shift+double_size_bytes;
        fseek(f,bytes_shift,'bof'); % move to next interleaved
        Clock_Offset = fread (f, count, 'float64',skip_bytes_each_read-double_size_bytes);
        bytes_shift=bytes_shift+double_size_bytes;
        fseek(f,bytes_shift,'bof'); % move to next interleaved
        Lat = fread (f, count, 'float64',skip_bytes_each_read-double_size_bytes);
        bytes_shift=bytes_shift+double_size_bytes;
        fseek(f,bytes_shift,'bof'); % move to next interleaved
        Long = fread (f, count, 'float64',skip_bytes_each_read-double_size_bytes);
        bytes_shift=bytes_shift+double_size_bytes;
        fseek(f,bytes_shift,'bof'); % move to next interleaved
        Height = fread (f, count, 'float64',skip_bytes_each_read-double_size_bytes);
        bytes_shift=bytes_shift+double_size_bytes;
        fseek(f,bytes_shift,'bof'); % move to next interleaved
        fclose (f);
  end
  
  navSolutions.X=ECEF_X.';
  navSolutions.Y=ECEF_Y.';
  navSolutions.Z=ECEF_Z.';
  navSolutions.dt=Clock_Offset.';
  navSolutions.latitude=Lat.';
  navSolutions.longitude=Long.';
  navSolutions.height=Height.';
  navSolutions.TransmitTime=GPS_current_time.';