#    Copyright (C) 2001 Artifex Software Inc.
#    All Rights Reserved.
#
# This software is provided AS-IS with no warranty, either express or
# implied.
#
# This software is distributed under license and may not be copied, modified
# or distributed except as expressly authorized under the terms of that
# license.  Refer to licensing information at http://www.artifex.com/
# or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
# San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
 
# $Id: rasterdb.py 8409 2007-11-27 20:43:09Z giles $
 
# rasterdb.py
#
# methods to put and retrieve files to and from the raster database

import os, gzip
from stat import *
import gsconf

def exists(file, dbdir=gsconf.rasterdbdir):
    x = 0
    filename=dbdir + file + '.gz'
    try:
        mode = os.stat(dbdir + file + '.gz')[ST_MODE]
        if S_ISREG(mode):
            x = 1
    except:
        pass
    
    return x

def get_file(file, dbdir=gsconf.rasterdbdir, output=None):
    if exists(file, dbdir):
        if output:
            ofile = output
        else:
            ofile = file
        zf = gzip.open(dbdir + file + '.gz')
        f = open(ofile, 'w')
        data = zf.read(1024)
        while data:
            f.write(data)
            data = zf.read(1024)
        zf.close()
        f.close()
    else:
        print "rasterdb.get_file: does not exist",file

def put_file(file, dbdir=gsconf.rasterdbdir):
    mode = os.stat(file)[ST_MODE]
    if S_ISREG(mode):
        f = open(file)
        zf = gzip.open(dbdir + file + '.gz', 'w')
        data = f.read(1024)
        while data:
            zf.write(data)
            data = f.read(1024)
        f.close()
        zf.close()