Add "storage type" to the typelib data for enums

In order to set and get enum and flag fields in structures, we need
to know the integral type that the enumeration is stored as. We are already
computing that at compile time in order to compute struct offsets, so the
easiest thing to do is to save that in the typelib.

* docs/typelib-format.txt girepository/girnode.[ch] girepository/giroffsets.c
girepository/gtypelib.h: Add 'storage_type' to the typelib format for EnumBlob
and compute and save it at compile time.

* girepository/girepository.h girepository/ginfo.c:
Add g_enum_info_get_storage_type().

* girepository/gfield.c: Implement reading and writing enum and flags fields
based on the storage type.

http://bugzilla.gnome.org/show_bug.cgi?id=561296

svn path=/trunk/; revision=944

1 files changed, 6 insertions, 1 deletions

diff --git a/docs/typelib-format.txt b/docs/typelib-format.txt
index fa76393e..d7cfedae 100644
--- a/docs/typelib-format.txt
+++ b/docs/typelib-format.txt
@@ -856,7 +856,8 @@ struct EnumBlob
   guint16   blob_type;  /* 5: enum, 6: flags */
   guint     deprecated   : 1; 
   guint     unregistered : 1;
-  guint     reserved     :14;
+  guint     storage_type : 5;
+  guint     reserved     : 9;
   guint32   name; 
 
   GTypeBlob gtype;
@@ -870,6 +871,10 @@ struct EnumBlob
 unregistered: 
           If this is set, the type is not registered with GType.
 
+storage_type:
+	  The tag of the type used for the enum in the C ABI
+	  (will be a signed or unsigned integral type)
+
 gtype:    For types which are registered with GType, contains the 
           information about the GType. Otherwise unused.