79 lines
2.6 KiB
Ruby
79 lines
2.6 KiB
Ruby
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#
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# Copyright (C) 2008, 2009 Wayne Meissner
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# Copyright (C) 2009 Luc Heinrich
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#
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# This file is part of ruby-ffi.
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#
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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# * Neither the name of the Ruby FFI project nor the names of its contributors
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# may be used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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module FFI
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class VariadicInvoker
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def init(arg_types, type_map)
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@fixed = Array.new
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@type_map = type_map
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arg_types.each_with_index do |type, i|
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@fixed << type unless type == Type::VARARGS
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end
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end
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def call(*args, &block)
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param_types = Array.new(@fixed)
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param_values = Array.new
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@fixed.each_with_index do |t, i|
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param_values << args[i]
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end
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i = @fixed.length
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while i < args.length
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param_types << FFI.find_type(args[i], @type_map)
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param_values << args[i + 1]
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i += 2
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end
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invoke(param_types, param_values, &block)
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end
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#
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# Attach the invoker to module +mod+ as +mname+
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#
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def attach(mod, mname)
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invoker = self
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params = "*args"
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call = "call"
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mod.module_eval <<-code
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@@#{mname} = invoker
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def self.#{mname}(#{params})
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@@#{mname}.#{call}(#{params})
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end
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def #{mname}(#{params})
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@@#{mname}.#{call}(#{params})
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end
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code
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invoker
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end
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end
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end
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