#!/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
#
#
#   The fslio.c file was originally part of FSL - FMRIB's Software Library
#   http://www.fmrib.ox.ac.uk/fsl
#   imtest has now been placed in the public domain.
#
#   Developed at FMRIB (Oxford Centre for Functional Magnetic Resonance
#   Imaging of the Brain), Department of Clinical Neurology, Oxford
#   University, Oxford, UK
#
#

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

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

filename=`${FSLDIR}/bin/remove_ext $1`;

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

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

if [ ! -r ${filename}.hdr -a ! -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 -a ! -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;