blob: b25f7c873c191a32288c04c96126a4cbd2487f1a [file] [log] [blame]
:: # Copyright 2013, Big Switch Networks, Inc.
:: #
:: # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
:: # the following special exception:
:: #
:: # LOXI Exception
:: #
:: # As a special exception to the terms of the EPL, you may distribute libraries
:: # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
:: # that copyright and licensing notices generated by LoxiGen are not altered or removed
:: # from the LoxiGen Libraries and the notice provided below is (i) included in
:: # the LoxiGen Libraries, if distributed in source code form and (ii) included in any
:: # documentation for the LoxiGen Libraries, if distributed in binary form.
:: #
:: # Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
:: #
:: # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
:: # a copy of the EPL at:
:: #
:: # http://www.eclipse.org/legal/epl-v10.html
:: #
:: # Unless required by applicable law or agreed to in writing, software
:: # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
:: # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
:: # EPL for the specific language governing permissions and limitations
:: # under the EPL.
::
OFReader = {}
OFReader.new = function(buf, offset)
local self = {}
offset = offset or 0
self.read = function(len)
local r = buf(offset, len)
offset = offset + len
return r
end
self.read_all = function()
local r = buf(offset, buf:len() - offset)
offset = buf:len()
return r
end
self.peek = function(off, len)
return buf(offset + off, len)
end
self.peek_all = function(off)
return buf(offset + off, buf:len() - offset - off)
end
self.skip = function(len)
offset = offset + len
end
self.is_empty = function()
return offset == buf:len()
end
self.slice = function(len)
r = OFReader.new(buf(offset, len))
offset = offset + len
return r
end
return self
end