48 lines
1.5 KiB
Ruby
48 lines
1.5 KiB
Ruby
# -*- ruby -*-
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# frozen_string_literal: true
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# for backward compatibility
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warn "Win32API is deprecated after Ruby 1.9.1; use fiddle directly instead", uplevel: 2
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require 'fiddle/import'
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class Win32API
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DLL = {}
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TYPEMAP = {"0" => Fiddle::TYPE_VOID, "S" => Fiddle::TYPE_VOIDP, "I" => Fiddle::TYPE_LONG}
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POINTER_TYPE = Fiddle::SIZEOF_VOIDP == Fiddle::SIZEOF_LONG_LONG ? 'q*' : 'l!*'
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WIN32_TYPES = "VPpNnLlIi"
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DL_TYPES = "0SSI"
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def initialize(dllname, func, import, export = "0", calltype = :stdcall)
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@proto = [import].join.tr(WIN32_TYPES, DL_TYPES).sub(/^(.)0*$/, '\1')
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import = @proto.chars.map {|win_type| TYPEMAP[win_type.tr(WIN32_TYPES, DL_TYPES)]}
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export = TYPEMAP[export.tr(WIN32_TYPES, DL_TYPES)]
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calltype = Fiddle::Importer.const_get(:CALL_TYPE_TO_ABI)[calltype]
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handle = DLL[dllname] ||=
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begin
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Fiddle.dlopen(dllname)
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rescue Fiddle::DLError
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raise unless File.extname(dllname).empty?
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Fiddle.dlopen(dllname + ".dll")
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end
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@func = Fiddle::Function.new(handle[func], import, export, calltype)
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rescue Fiddle::DLError => e
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raise LoadError, e.message, e.backtrace
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end
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def call(*args)
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import = @proto.split("")
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args.each_with_index do |x, i|
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args[i], = [x == 0 ? nil : x].pack("p").unpack(POINTER_TYPE) if import[i] == "S"
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args[i], = [x].pack("I").unpack("i") if import[i] == "I"
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end
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ret, = @func.call(*args)
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return ret || 0
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end
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alias Call call
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end
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