1 #!/usr/bin/env python 2 3 """ 4 File objects. 5 6 Copyright (C) 2015, 2016 Paul Boddie <paul@boddie.org.uk> 7 8 This program is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free Software 10 Foundation; either version 3 of the License, or (at your option) any later 11 version. 12 13 This program is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 details. 17 18 You should have received a copy of the GNU General Public License along with 19 this program. If not, see <http://www.gnu.org/licenses/>. 20 """ 21 22 from __builtins__.types import check_int, check_string 23 import native 24 25 class filestream: 26 27 "Generic file-oriented stream functionality." 28 29 def __init__(self, bufsize=1024): 30 31 "Initialise the stream with the given 'bufsize'." 32 33 self.bufsize = bufsize 34 self.__data__ = None 35 36 def read(self, n=0): 37 38 "Read 'n' bytes from the stream." 39 40 check_int(n) 41 42 # Read any indicated number of bytes. 43 44 if n > 0: 45 return native._fread(self.__data__, n) 46 47 # Read all remaining bytes. 48 49 else: 50 l = [] 51 52 # Read until end-of-file. 53 54 try: 55 while True: 56 l.append(native._fread(self.__data__, self.bufsize)) 57 58 # Handle end-of-file reads. 59 60 except EOFError: 61 pass 62 63 return "".join(l) 64 65 def write(self, s): 66 67 "Write string 's' to the stream." 68 69 check_string(s) 70 native._fwrite(self.__data__, s) 71 72 def close(self): pass 73 74 class file(filestream): 75 76 "A file abstraction." 77 78 def __init__(self, filename, mode="r", bufsize=1024): 79 80 "Open the file with the given 'filename' using the given access 'mode'." 81 82 get_using(filestream.__init__, self)(bufsize) 83 self.__data__ = native._fopen(filename, mode) 84 85 def readline(self, size=None): pass 86 def readlines(self, size=None): pass 87 88 # vim: tabstop=4 expandtab shiftwidth=4
