Sha256: 82a704d91f688d7484b65ab596ad1b35fa59b8f6b65e3cc6da2cda1fe3104b67
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Size: 1.38 KB
Versions: 43
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Contents
#!/usr/bin/env ruby # Rex::Struct2 module Rex module Struct2 class Generic require 'rex/struct2/element' include Rex::Struct2::Element attr_reader :default attr_writer :default attr_accessor :mask, :check_mask def initialize(packspec, signed=false, default=nil) @packspec = packspec @default = default bytelen = [ -1 ].pack(@packspec).length self.mask = (1 << (8 * bytelen)) - 1 if signed self.check_mask = 1 << (8 * bytelen - 1) else self.check_mask = 0 end reset() end def reset self.value = @default end def to_s # I realize this will bomb out if this isn't an integer, for # example if it is nil. That should only happen for a user # error so that's what I want it to do... string = [ @value ].pack(@packspec) if restraint && restraint.max return string.slice(0, restraint.max) else return string end # what to do for restraint.min?!? end def from_s(bytes) value = bytes.unpack(@packspec)[0] # return nil on unpack error return if !value len = slength() # error on any restraint issues return if restraint && restraint.max && len > restraint.max return if restraint && restraint.min && len < restraint.min # else set our value and return length used for this element if (value & check_mask) != 0 value = -((~value & mask) + 1) end self.value = value return(len) end end # end Rex::Struct2 end end
Version data entries
43 entries across 43 versions & 1 rubygems