Add bin and edit workflow

bin/gems/ffi-1.17.1-x86_64-linux-gnu/lib/ffi/variadic.rb

@@ -0,0 +1,80 @@
+#
+# Copyright (C) 2008, 2009 Wayne Meissner
+# Copyright (C) 2009 Luc Heinrich
+#
+# This file is part of ruby-ffi.
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+# * Neither the name of the Ruby FFI project nor the names of its contributors
+#   may be used to endorse or promote products derived from this software
+#   without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+module FFI
+  class VariadicInvoker
+    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"
+      mname = mname.to_sym
+      mod.module_eval <<-code, __FILE__, __LINE__
+        @ffi_functions = {} unless defined?(@ffi_functions)
+        @ffi_functions[#{mname.inspect}] = invoker
+
+        def self.#{mname}(#{params})
+          @ffi_functions[#{mname.inspect}].#{call}(#{params})
+        end
+
+        define_method(#{mname.inspect}, &method(#{mname.inspect}))
+      code
+      invoker
+    end
+
+    # Retrieve Array of parameter types
+    #
+    # This method returns an Array of FFI types accepted as function parameters.
+    #
+    # @return [Array<FFI::Type>]
+    def param_types
+      [*@fixed, Type::Builtin::VARARGS]
+    end
+  end
+end