function initvalf(fname_)
% function initvalf(fname_)
%
% Reads an initial path from the 'fname_' file for exogenous and endogenous variables
%
% INPUTS
%    fname_:         name of the function or file containing the data
%
% OUTPUTS
%    none
%
% SPECIAL REQUIREMENTS
%    All variables local to this function have an underscore appended to
%    their name, to minimize clashes with model variables loaded by this function.

% Copyright (C) 2003-2018 Dynare Team
%
% This file is part of Dynare.
%
% Dynare 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.
%
% Dynare 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 Dynare.  If not, see <http://www.gnu.org/licenses/>.

global M_ oo_ options_

series_ = 1;

[directory, basename, extension] = fileparts(fname_);

% Auto-detect extension if not provided
if isempty(extension)
    if exist([basename '.m'],'file')
        extension = '.m';
    elseif exist([basename '.mat'],'file')
        extension = '.mat';
    elseif exist([basename '.xls'],'file')
        extension = '.xls';
    elseif exist([basename '.xlsx'],'file')
        extension = '.xlsx';
    else
        error(['Can''t find datafile: ' basename '.{m,mat,xls,xlsx}']);
    end
end

if isempty(directory)
    directory = '.';
end

fullname = [directory '/' basename extension];

if ~exist(fullname, 'file')
    error(['Can''t find datafile: ' fullname ]);
end

options_.initval_file = true;
oo_.endo_simul = [];
oo_.exo_simul = [];

if ismember(extension, {'.mat', '.m'}) && isdseries(fullname)
    data = dseries(fullname);
    % Add auxiliary variables if any.
    data = feval(sprintf('%s.dynamic_set_auxiliary_series', M_.fname), data, M_.params);
    % Remove NaNs in the first periods.
    data = data(data.firstobservedperiod:data.lastobservedperiod);
    % Fill endo_simul.
    oo_.endo_simul = transpose(data{M_.endo_names{:}}.data);
    % Fill exo_simul.
    oo_.exo_simul = data{M_.exo_names{:}}.data;
    % Update number of periods for the deterministic simulation.
    options_.periods = data.nobs-M_.maximum_lag-M_.maximum_lead;
else
    switch (extension)
      case '.m'
        eval(basename);
      case '.mat'
        load(basename);
      case { '.xls', '.xlsx' }
        [data_,names_v_]=xlsread(fullname); % Octave needs the extension explicitly
        series_=0;
      otherwise
        error(['Unsupported extension for datafile: ' extension])
    end
    for i_=1:length(M_.endo_names)
        if series_ == 1
            x_ = eval(M_.endo_names{i_});
            if size(x_,2)>size(x_,1) %oo_.endo_simul must be collection of row vectors
                oo_.endo_simul = [oo_.endo_simul; x_];
            else %transpose if column vector
                oo_.endo_simul = [oo_.endo_simul; x_'];
            end
        else
            k_ = strmatch(M_.endo_names{i_}, names_v_, 'exact');
            if isempty(k_)
                error(['INITVAL_FILE: ' M_.endo_names{i_} ' not found'])
            end
            x_ = data_(:,k_);
            oo_.endo_simul = [oo_.endo_simul; x_'];
        end
    end
    for i_=1:length(M_.exo_names)
        if series_ == 1
            x_ = eval(M_.exo_names{i_});
            if size(x_,2)>size(x_,1) %oo_.endo_simul must be collection of row vectors
                oo_.exo_simul = [oo_.exo_simul x_'];
            else %if column vector
                oo_.exo_simul = [oo_.exo_simul x_];
            end
        else
            k_ = strmatch(M_.exo_names{i_}, names_v_, 'exact');
            if isempty(k_)
                error(['INITVAL_FILE: ' M_.exo_names{i_} ' not found'])
            end
            x_ = data_(:,k_);
            oo_.exo_simul = [oo_.exo_simul x_];
        end
    end
end