* 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

1 files changed, 13 insertions, 0 deletions

diff --git a/ext/fiddle/fiddle.h b/ext/fiddle/fiddle.h
index 8c8a93425b..b37c37bc65 100644
--- a/ext/fiddle/fiddle.h
+++ b/ext/fiddle/fiddle.h
@@ -121,6 +121,19 @@
 #define TYPE_FLOAT 7
 #define TYPE_DOUBLE 8
 
+#define ALIGN_OF(type) offsetof(struct {char align_c; type align_x;}, align_x)
+
+#define ALIGN_VOIDP  ALIGN_OF(void*)
+#define ALIGN_SHORT  ALIGN_OF(short)
+#define ALIGN_CHAR   ALIGN_OF(char)
+#define ALIGN_INT    ALIGN_OF(int)
+#define ALIGN_LONG   ALIGN_OF(long)
+#if HAVE_LONG_LONG
+#define ALIGN_LONG_LONG ALIGN_OF(LONG_LONG)
+#endif
+#define ALIGN_FLOAT  ALIGN_OF(float)
+#define ALIGN_DOUBLE ALIGN_OF(double)
+
 extern VALUE mFiddle;
 extern VALUE rb_eFiddleError;