Sha256: 4664fd3303be378d69a304599a2199512267065e5b650d80e1c0cd62f6e78283
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Size: 1.15 KB
Versions: 23
Compression:
Stored size: 1.15 KB
Contents
# TODO: make read/write work for other oses
class Ragweed::Ptr
# A dubious achievement. Wrap Integers in a pointer class, which,
# when you call to_s, returns the marshalled type, and which exports
# read/write methods.
attr_accessor :p
attr_reader :val
# ptr-to-zero?
def null?
@val == 0
end
# initialize with a number or another pointer (implements copy-ctor)
def initialize(i)
if i.kind_of? self.class
@val = i.val
@p = i.p
elsif not i
@val = 0
else
@val = i
end
end
# return the raw pointer bits
def to_s; @val.to_l32; end
# return the underlying number
def to_i; @val; end
# only works if you attach a process
def write(arg); p.write(self, arg); end
def read(sz); p.read(self, sz); end
# everything else: work like an integer --- also, where these
# calls return numbers, turn them back into pointers, so pointer
# math doesn't shed the class wrapper
def method_missing(meth, *args)
ret = @val.send meth, *args
if ret.kind_of? Numeric
ret = Ragweed::Ptr.new(ret)
ret.p = self.p
end
ret
end
end
Version data entries
23 entries across 23 versions & 1 rubygems