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authortenderlove <tenderlove@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2012-11-28 00:02:49 +0000
committertenderlove <tenderlove@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2012-11-28 00:02:49 +0000
commit0713f89944ecfff3aeefda1edcf44c0ea3e98de0 (patch)
treea518520570eb0475cdc347b30e7ad716147cdbf2 /ext/fiddle/lib/fiddle/value.rb
parent118d9f43c8f2e1665fb6ebac751299a852072133 (diff)
* ext/fiddle/fiddle.c: adding alignment constants for compatibility
with DL. * ext/fiddle/fiddle.h: ditto * ext/fiddle/lib/fiddle/cparser.rb: importing the C parser for DL backwards compatibility. * ext/fiddle/lib/fiddle/import.rb: importing the import DSL for DL backwards compatibility. * ext/fiddle/lib/fiddle/pack.rb: importing structure pack for DL backwards compatibility. * ext/fiddle/lib/fiddle/value.rb: ditto * ext/fiddle/lib/fiddle/struct.rb: importing struct DSL for DL backwards compatibility. * test/dl/test_c_struct_entry.rb: importing tests * test/dl/test_c_union_entity.rb: ditto * test/dl/test_cparser.rb: ditto * test/dl/test_import.rb: ditto * test/fiddle/test_c_struct_entry.rb: ditto * test/fiddle/test_c_union_entity.rb: ditto * test/fiddle/test_cparser.rb: ditto * test/fiddle/test_import.rb: ditto git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37914 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/fiddle/lib/fiddle/value.rb')
-rw-r--r--ext/fiddle/lib/fiddle/value.rb114
1 files changed, 114 insertions, 0 deletions
diff --git a/ext/fiddle/lib/fiddle/value.rb b/ext/fiddle/lib/fiddle/value.rb
new file mode 100644
index 00000000000..0849e4ac350
--- /dev/null
+++ b/ext/fiddle/lib/fiddle/value.rb
@@ -0,0 +1,114 @@
+require 'fiddle'
+
+module Fiddle
+ module ValueUtil
+ def unsigned_value(val, ty)
+ case ty.abs
+ when TYPE_CHAR
+ [val].pack("c").unpack("C")[0]
+ when TYPE_SHORT
+ [val].pack("s!").unpack("S!")[0]
+ when TYPE_INT
+ [val].pack("i!").unpack("I!")[0]
+ when TYPE_LONG
+ [val].pack("l!").unpack("L!")[0]
+ when TYPE_LONG_LONG
+ [val].pack("q").unpack("Q")[0]
+ else
+ val
+ end
+ end
+
+ def signed_value(val, ty)
+ case ty.abs
+ when TYPE_CHAR
+ [val].pack("C").unpack("c")[0]
+ when TYPE_SHORT
+ [val].pack("S!").unpack("s!")[0]
+ when TYPE_INT
+ [val].pack("I!").unpack("i!")[0]
+ when TYPE_LONG
+ [val].pack("L!").unpack("l!")[0]
+ when TYPE_LONG_LONG
+ [val].pack("Q").unpack("q")[0]
+ else
+ val
+ end
+ end
+
+ def wrap_args(args, tys, funcs, &block)
+ result = []
+ tys ||= []
+ args.each_with_index{|arg, idx|
+ result.push(wrap_arg(arg, tys[idx], funcs, &block))
+ }
+ result
+ end
+
+ def wrap_arg(arg, ty, funcs = [], &block)
+ require 'dl/func'
+
+ funcs ||= []
+ case arg
+ when nil
+ return 0
+ when Pointer
+ return arg.to_i
+ when IO
+ case ty
+ when TYPE_VOIDP
+ return Pointer[arg].to_i
+ else
+ return arg.to_i
+ end
+ when Function
+ if( block )
+ arg.bind_at_call(&block)
+ funcs.push(arg)
+ elsif !arg.bound?
+ raise(RuntimeError, "block must be given.")
+ end
+ return arg.to_i
+ when String
+ if( ty.is_a?(Array) )
+ return arg.unpack('C*')
+ else
+ case SIZEOF_VOIDP
+ when SIZEOF_LONG
+ return [arg].pack("p").unpack("l!")[0]
+ when SIZEOF_LONG_LONG
+ return [arg].pack("p").unpack("q")[0]
+ else
+ raise(RuntimeError, "sizeof(void*)?")
+ end
+ end
+ when Float, Integer
+ return arg
+ when Array
+ if( ty.is_a?(Array) ) # used only by struct
+ case ty[0]
+ when TYPE_VOIDP
+ return arg.collect{|v| Integer(v)}
+ when TYPE_CHAR
+ if( arg.is_a?(String) )
+ return val.unpack('C*')
+ end
+ end
+ return arg
+ else
+ return arg
+ end
+ else
+ if( arg.respond_to?(:to_ptr) )
+ return arg.to_ptr.to_i
+ else
+ begin
+ return Integer(arg)
+ rescue
+ raise(ArgumentError, "unknown argument type: #{arg.class}")
+ end
+ end
+ end
+ end
+ end
+end