/usr/lib/ruby/1.9.1/dl/value.rb is in libruby1.9.1 1.9.3.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | require 'dl'
module DL
module ValueUtil
def unsigned_value(val, ty)
case ty.abs
when TYPE_CHAR
[val].pack("c").unpack("C")[0]
when TYPE_SHORT
[val].pack("s!").unpack("S!")[0]
when TYPE_INT
[val].pack("i!").unpack("I!")[0]
when TYPE_LONG
[val].pack("l!").unpack("L!")[0]
when TYPE_LONG_LONG
[val].pack("q!").unpack("Q!")[0]
else
val
end
end
def signed_value(val, ty)
case ty.abs
when TYPE_CHAR
[val].pack("C").unpack("c")[0]
when TYPE_SHORT
[val].pack("S!").unpack("s!")[0]
when TYPE_INT
[val].pack("I!").unpack("i!")[0]
when TYPE_LONG
[val].pack("L!").unpack("l!")[0]
when TYPE_LONG_LONG
[val].pack("Q!").unpack("q!")[0]
else
val
end
end
def wrap_args(args, tys, funcs, &block)
result = []
tys ||= []
args.each_with_index{|arg, idx|
result.push(wrap_arg(arg, tys[idx], funcs, &block))
}
result
end
def wrap_arg(arg, ty, funcs = [], &block)
funcs ||= []
case arg
when nil
return 0
when CPtr
return arg.to_i
when IO
case ty
when TYPE_VOIDP
return CPtr[arg].to_i
else
return arg.to_i
end
when Function
if( block )
arg.bind_at_call(&block)
funcs.push(arg)
elsif !arg.bound?
raise(RuntimeError, "block must be given.")
end
return arg.to_i
when String
if( ty.is_a?(Array) )
return arg.unpack('C*')
else
case SIZEOF_VOIDP
when SIZEOF_LONG
return [arg].pack("p").unpack("l!")[0]
when SIZEOF_LONG_LONG
return [arg].pack("p").unpack("q")[0]
else
raise(RuntimeError, "sizeof(void*)?")
end
end
when Float, Integer
return arg
when Array
if( ty.is_a?(Array) ) # used only by struct
case ty[0]
when TYPE_VOIDP
return arg.collect{|v| Integer(v)}
when TYPE_CHAR
if( arg.is_a?(String) )
return val.unpack('C*')
end
end
return arg
else
return arg
end
else
if( arg.respond_to?(:to_ptr) )
return arg.to_ptr.to_i
else
begin
return Integer(arg)
rescue
raise(ArgumentError, "unknown argument type: #{arg.class}")
end
end
end
end
end
end
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