The pointer from native is stored inside of a class which
wraps the structure. Fields can be accessed by marshalling
from and to the pointer. glib: Value.Update does now invoke
a private Update() method which is needed to update the new
structures.
Unfortunately, gir marks all integers as gint regardless
of its size. We have to check if the value will really
fit into a int, that is why there is an automatic fallback
to long.
Bundle Options.cs from the Mono source tree, and use it to parse the
command-line options for gapi-codegen. This gives us clearer code,
descriptions for each option, and a nice "--help" output.
This does not change the options syntax, except that -I|--include needs
to specified for each file to include. Two Makefiles in sample/ are
updated for that change.
