#!/bin/sh

#   imtest - test to see if a valid image file exists with this name (root)
#
#   Stephen Smith and Mark Jenkinson, FMRIB Image Analysis Group
#
#   Copyright (C) 1999-2004 University of Oxford
#
#   Part of FSL - FMRIB's Software Library
#   http://www.fmrib.ox.ac.uk/fsl
#   fsl@fmrib.ox.ac.uk
#   
#   Developed at FMRIB (Oxford Centre for Functional Magnetic Resonance
#   Imaging of the Brain), Department of Clinical Neurology, Oxford
#   University, Oxford, UK
#   
#   
#   LICENCE
#   
#   FMRIB Software Library, Release 5.0 (c) 2012, The University of
#   Oxford (the "Software")
#   
#   The Software remains the property of the University of Oxford ("the
#   University").
#   
#   The Software is distributed "AS IS" under this Licence solely for
#   non-commercial use in the hope that it will be useful, but in order
#   that the University as a charitable foundation protects its assets for
#   the benefit of its educational and research purposes, the University
#   makes clear that no condition is made or to be implied, nor is any
#   warranty given or to be implied, as to the accuracy of the Software,
#   or that it will be suitable for any particular purpose or for use
#   under any specific conditions. Furthermore, the University disclaims
#   all responsibility for the use which is made of the Software. It
#   further disclaims any liability for the outcomes arising from using
#   the Software.
#   
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#   
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#   without the express permission of the University. The permission of
#   the University is not required if the said reproduction, modification,
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#   
#   You are not permitted under this Licence to use this Software
#   commercially. Use for which any financial return is received shall be
#   defined as commercial use, and includes (1) integration of all or part
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#   University, to negotiate a licence. Contact details are:
#   innovation@isis.ox.ac.uk quoting reference DE/9564.

# return 0 if no image exists or 1 if the image exists

if [ $# -lt 1 ] ; then
 echo "0";
 exit;
fi

inputfile=$1



for i in 1 2 3 4 5 6 7 8 9 10 11 12
do
if [ -h $inputfile ] ; then 
inputfile=`readlink $inputfile`;
fi
done

filename=`${FSLDIR}/bin/remove_ext $inputfile`;

if [ -r ${filename}.nii ] || [ -r ${filename}.nii.gz ] ; then
  echo "1";
  exit;
fi

if [ -r ${filename}.mnc ] || [ -r ${filename}.mnc.gz ] ; then
  echo "1";
  exit;
fi

if [ ! -r ${filename}.hdr ] && [ ! -r ${filename}.hdr.gz ] ; then
  # return 0 here as no header exists and no single image means no image!
  echo "0";
  exit;
fi

if [ ! -r ${filename}.img ] && [ ! -r ${filename}.img.gz ] ; then
  # return 0 here as no img file exists and no single image means no image!
  echo "0";
  exit;
fi

# only gets to here if there was a hdr and an img file

echo "1";
exit;