paul@6 | 1 | #!/usr/bin/env python |
paul@6 | 2 | |
paul@6 | 3 | """ |
paul@6 | 4 | Buffer object. |
paul@6 | 5 | |
paul@665 | 6 | Copyright (C) 2015, 2016, 2017 Paul Boddie <paul@boddie.org.uk> |
paul@6 | 7 | |
paul@6 | 8 | This program is free software; you can redistribute it and/or modify it under |
paul@6 | 9 | the terms of the GNU General Public License as published by the Free Software |
paul@6 | 10 | Foundation; either version 3 of the License, or (at your option) any later |
paul@6 | 11 | version. |
paul@6 | 12 | |
paul@6 | 13 | This program is distributed in the hope that it will be useful, but WITHOUT |
paul@6 | 14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
paul@6 | 15 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more |
paul@6 | 16 | details. |
paul@6 | 17 | |
paul@6 | 18 | You should have received a copy of the GNU General Public License along with |
paul@6 | 19 | this program. If not, see <http://www.gnu.org/licenses/>. |
paul@6 | 20 | """ |
paul@6 | 21 | |
paul@354 | 22 | from native import list_init, list_append, list_concat, buffer_str |
paul@206 | 23 | |
paul@259 | 24 | class buffer: |
paul@206 | 25 | |
paul@206 | 26 | "A buffer, used to build strings." |
paul@206 | 27 | |
paul@209 | 28 | def __init__(self, args=None, size=0): |
paul@206 | 29 | |
paul@206 | 30 | "Initialise a buffer from the given 'args' or the given 'size'." |
paul@206 | 31 | |
paul@209 | 32 | if args is not None: |
paul@209 | 33 | n = len(args) |
paul@209 | 34 | elif isinstance(size, int): |
paul@209 | 35 | n = size |
paul@209 | 36 | else: |
paul@665 | 37 | raise ValueError(size) |
paul@209 | 38 | |
paul@354 | 39 | self.__data__ = list_init(n) |
paul@206 | 40 | |
paul@221 | 41 | # Append all arguments to the buffer. |
paul@206 | 42 | |
paul@206 | 43 | if args: |
paul@206 | 44 | for arg in args: |
paul@221 | 45 | self.append(arg) |
paul@206 | 46 | |
paul@206 | 47 | def append(self, s): |
paul@206 | 48 | |
paul@221 | 49 | """ |
paul@221 | 50 | Append 's' to the buffer, concatenating buffers and adding other objects |
paul@221 | 51 | in string form. |
paul@221 | 52 | """ |
paul@206 | 53 | |
paul@206 | 54 | if isinstance(s, buffer): |
paul@354 | 55 | list_concat(self, s.__data__) |
paul@206 | 56 | elif isinstance(s, string): |
paul@354 | 57 | list_append(self, s) |
paul@206 | 58 | else: |
paul@354 | 59 | list_append(self, str(s)) |
paul@206 | 60 | |
paul@206 | 61 | def __str__(self): |
paul@206 | 62 | |
paul@206 | 63 | "Return a string representation." |
paul@206 | 64 | |
paul@354 | 65 | return buffer_str(self.__data__) |
paul@6 | 66 | |
paul@259 | 67 | def __repr__(self): |
paul@259 | 68 | |
paul@259 | 69 | "Return a program representation." |
paul@259 | 70 | |
paul@259 | 71 | return buffer(["buffer([", repr(str(self)), "])"]) |
paul@259 | 72 | |
paul@6 | 73 | # vim: tabstop=4 expandtab shiftwidth=4 |