#!/usr/bin/python

import os
import sys
import numpy

if len(sys.argv) == 2:
    src = sys.argv[1]

    chapters = numpy.genfromtxt(src + ".chapters", dtype="int", delimiter=",")

    for n in range(len(chapters)):
        first = str(chapters[n][0])
        last = str(chapters[n][1])

        opts = "-sDEVICE=pdfwrite -dNOPAUSE -dBATCH -dSAFER"
        cmd = ("gs " + opts + " -dFirstPage=" + first + " -dLastPage=" + last + " -sOutputFile=Chapter-" + str(n + 1) + ".pdf " + src)
        print(cmd)
        os.system(cmd)