Rich Lane | 9cfa165 | 2013-10-01 21:24:04 -0700 | [diff] [blame] | 1 | :: # Copyright 2013, Big Switch Networks, Inc. |
| 2 | :: # |
| 3 | :: # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with |
| 4 | :: # the following special exception: |
| 5 | :: # |
| 6 | :: # LOXI Exception |
| 7 | :: # |
| 8 | :: # As a special exception to the terms of the EPL, you may distribute libraries |
| 9 | :: # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided |
| 10 | :: # that copyright and licensing notices generated by LoxiGen are not altered or removed |
| 11 | :: # from the LoxiGen Libraries and the notice provided below is (i) included in |
| 12 | :: # the LoxiGen Libraries, if distributed in source code form and (ii) included in any |
| 13 | :: # documentation for the LoxiGen Libraries, if distributed in binary form. |
| 14 | :: # |
| 15 | :: # Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler." |
| 16 | :: # |
| 17 | :: # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain |
| 18 | :: # a copy of the EPL at: |
| 19 | :: # |
| 20 | :: # http://www.eclipse.org/legal/epl-v10.html |
| 21 | :: # |
| 22 | :: # Unless required by applicable law or agreed to in writing, software |
| 23 | :: # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 24 | :: # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 25 | :: # EPL for the specific language governing permissions and limitations |
| 26 | :: # under the EPL. |
| 27 | :: |
Rich Lane | 872b95a | 2013-06-17 18:39:14 -0700 | [diff] [blame] | 28 | OFReader = {} |
| 29 | OFReader.new = function(buf, offset) |
| 30 | local self = {} |
| 31 | offset = offset or 0 |
| 32 | |
| 33 | self.read = function(len) |
| 34 | local r = buf(offset, len) |
| 35 | offset = offset + len |
| 36 | return r |
| 37 | end |
| 38 | |
| 39 | self.read_all = function() |
| 40 | local r = buf(offset, buf.len() - offset) |
| 41 | offset = buf.len() |
| 42 | return r |
| 43 | end |
| 44 | |
| 45 | self.peek = function(off, len) |
| 46 | return buf(offset + off, len) |
| 47 | end |
| 48 | |
| 49 | self.skip = function(len) |
| 50 | offset = offset + len |
| 51 | end |
| 52 | |
| 53 | self.is_empty = function() |
| 54 | return offset == buf:len() |
| 55 | end |
| 56 | |
| 57 | self.slice = function(len) |
| 58 | r = OFReader.new(buf(offset, len)) |
| 59 | offset = offset + len |
| 60 | return r |
| 61 | end |
| 62 | |
| 63 | return self |
| 64 | end |