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/*
* Copyright (c) 2009 Samit Basu
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "Array.hpp"
#include "Utils.hpp"
//@@Signature
//function reshape ReshapeFunction jitsafe
//inputs x varargin
//outputs y
//DOCBLOCK array_reshape
ArrayVector ReshapeFunction(int nargout, const ArrayVector& arg) {
if (arg.size() == 0)
throw Exception("reshape function requires at least one argument");
if (arg.size() == 1) return arg;
ArrayVector arg_copy(arg);
arg_copy.pop_front();
// Check for the special case of exactly one of the dimensions being
// empty.
int empty_count = 0;
int empty_slot = 0;
for (int i=0;i<arg_copy.size();i++)
if (arg_copy[i].isEmpty())
{
empty_count++;
empty_slot = i;
}
if (empty_count > 1)
throw Exception("reshape can take exactly one empty dimension argument");
if (empty_count == 1)
arg_copy[empty_slot] = Array(int(1));
NTuple dims(ArrayVectorAsDimensions(arg_copy));
if (empty_count == 1)
{
int A_count = arg[0].length();
int Desired_count = dims.count();
// Check to see if A_count is a multiple of Desired_count
if (A_count % Desired_count != 0)
throw Exception("reshape cannot be done");
dims[empty_slot] = int(A_count/Desired_count);
}
Array y(arg[0]);
y.reshape(dims);
return ArrayVector(y);
}
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