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#
# Copyright (C) 2008, 2009 Wayne Meissner
# Copyright (C) 2009 Luc Heinrich
# All rights reserved.
#
# This file is part of ruby-ffi.
#
# This code is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License version 3 only, as
# published by the Free Software Foundation.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
# version 3 for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# version 3 along with this work. If not, see <http://www.gnu.org/licenses/>.
module FFI
class VariadicInvoker
def init(arg_types, type_map)
@fixed = Array.new
@type_map = type_map
arg_types.each_with_index do |type, i|
@fixed << type unless type == Type::VARARGS
end
end
def call(*args, &block)
param_types = Array.new(@fixed)
param_values = Array.new
@fixed.each_with_index do |t, i|
param_values << args[i]
end
i = @fixed.length
while i < args.length
param_types << FFI.find_type(args[i], @type_map)
param_values << args[i + 1]
i += 2
end
invoke(param_types, param_values, &block)
end
#
# Attach the invoker to module +mod+ as +mname+
#
def attach(mod, mname)
invoker = self
params = "*args"
call = "call"
mod.module_eval <<-code
@@#{mname} = invoker
def self.#{mname}(#{params})
@@#{mname}.#{call}(#{params})
end
def #{mname}(#{params})
@@#{mname}.#{call}(#{params})
end
code
invoker
end
end
end
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