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-rw-r--r--ext/dl/win32/lib/Win32API.rb28
1 files changed, 28 insertions, 0 deletions
diff --git a/ext/dl/win32/lib/Win32API.rb b/ext/dl/win32/lib/Win32API.rb
new file mode 100644
index 0000000000..b642e0c8fe
--- /dev/null
+++ b/ext/dl/win32/lib/Win32API.rb
@@ -0,0 +1,28 @@
+# -*- ruby -*-
+# for backward compatibility
+warn "Warning:#{caller[0].sub(/:in `.*'\z/, '')}: Win32API is deprecated after Ruby 1.9.1; use dl directly instead" if $VERBOSE
+
+require 'dl'
+
+class Win32API
+ DLL = {}
+ TYPEMAP = {"0" => DL::TYPE_VOID, "S" => DL::TYPE_VOIDP, "I" => DL::TYPE_LONG}
+
+ def initialize(dllname, func, import, export = "0")
+ @proto = [import].join.tr("VPpNnLlIi", "0SSI").sub(/^(.)0*$/, '\1')
+ handle = DLL[dllname] ||= DL.dlopen(dllname)
+ @func = DL::CFunc.new(handle[func], TYPEMAP[export.tr("VPpNnLlIi", "0SSI")], func)
+ end
+
+ def call(*args)
+ import = @proto.split("")
+ args.each_with_index do |x, i|
+ args[i], = [x == 0 ? nil : x].pack("p").unpack("l!*") if import[i] == "S"
+ args[i], = [x].pack("I").unpack("i") if import[i] == "I"
+ end
+ ret, = @func.call(args)
+ return ret || 0
+ end
+
+ alias Call call
+end