cpython/Mac/Demo/example0/checktext.py

"""checktext - Check that a text file has macintosh-style newlines"""

import sys
import EasyDialogs
import string

def main():
	pathname = EasyDialogs.AskFileForOpen(message='File to check end-of-lines in:')
	if not pathname:
		sys.exit(0)
	fp = open(pathname, 'rb')
	try:
		data = fp.read()
	except MemoryError:
		EasyDialogs.Message('Sorry, file is too big.')
		sys.exit(0)
	if len(data) == 0:
		EasyDialogs.Message('File is empty.')
		sys.exit(0)
	number_cr = string.count(data, '\r')
	number_lf = string.count(data, '\n')
	if number_cr == number_lf == 0:
		EasyDialogs.Message('File contains no lines.')
	if number_cr == 0:
		EasyDialogs.Message('File has unix-style line endings')
	elif number_lf == 0:
		EasyDialogs.Message('File has mac-style line endings')
	elif number_cr == number_lf:
		EasyDialogs.Message('File probably has MSDOS-style line endings')
	else:
		EasyDialogs.Message('File has no recognizable line endings (binary file?)')
	sys.exit(0)
	
if __name__ == '__main__':
	main()