#!/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
#
#   SHCOPYRIGHT

# 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;