#  This software and supporting documentation are distributed by
#      Institut Federatif de Recherche 49
#      CEA/NeuroSpin, Batiment 145,
#      91191 Gif-sur-Yvette cedex
#      France
#
# This software is governed by the CeCILL license version 2 under
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# You can  use, modify and/or redistribute the software under the 
# terms of the CeCILL license version 2 as circulated by CEA, CNRS
# and INRIA at the following URL "http://www.cecill.info". 
#
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from brainvisa.processes import *
import shfjGlobals
import gzip, shutil

name = 'uncompress GIS'
roles = ('converter',)
userLevel=1

signature = Signature(
  'read', ReadDiskItem( '4D Volume', [ 'gz Compressed GIS Image', 
                                       'Z Compressed GIS Image' ],
                        enableConversion = 0 ),
  'write', WriteDiskItem( '4D Volume', 'GIS image' ),
  'removeSource', Boolean(),
)

def initialization( self ):
  self.linkParameters( 'write', 'read' )
  self.removeSource = 0

def execution( self, context ):
  source = self.read.fullPaths()
  dest = self.write.fullPaths()
  for i in xrange( len( source ) ):
    f = gzip.open( source[i], 'rb' )
    g = open( dest[i], 'wb' )
    while 1:
      buf = f.read( 1000 )
      if len( buf ) == 0:
        break
      g.write( buf )
    f.close()
    g.close()
    if self.removeSource:
      os.unlink( source[ i ] )
  # copy minf file
  if os.path.exists( self.read.minfFileName() ):
    shutil.copyfile( self.read.minfFileName(), self.write.minfFileName() )