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# Copyright (C) 2014 Combox author(s). See AUTHORS.
#
# This file is part of Combox.
#
# Combox is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Combox is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Combox (see COPYING). If not, see
# <http://www.gnu.org/licenses/>.
from os import path
from sys import exit
def split_file(filename, n):
"""Split the file into `n' parts and return them as an array.
filename: Absolute pathname of the file.
n: Number of parts the file has to be split.
"""
file_ = None
try:
file_ = open(filename, 'rb')
except IOError:
print "ERROR: opening %s" % (filename)
exit(1)
f_parts = []
# File size in bytes.
file_size = path.getsize(filename)
# No. of bytes for each file part.
part_size = file_size / n
# Take note of remaining bytes; this is non-zero when file_size is
# not divisible by `n'.
rem_bytes = file_size % n
i = 0
while i < n:
f_parts.append(file_.read(part_size))
i += 1
# read the remaining bytes into the last file part.
f_parts[n-1] += file_.read(rem_bytes)
return f_parts
def glue_file(f_parts):
"""Glue different parts of the file to one.
f_parts: Array containing different parts of the file. Each part
is a sequence of bytes.
"""
file_content = ''
for part in f_parts:
file_content += part
return file_content
def write_file(filename, filecontent):
"""Write `filecontent' to `filename'.
filename: Absolute pathname of the file.
filecontent: String/bytstream to write to filename.
"""
file_ = None
try:
file_ = open(filename, 'wb')
file_.write(filecontent)
except IOError:
print "ERROR: creating and writing content to %s" % (filename)
exit(1)
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