Hi
Kevin Ollivier wrote:
> Hi Eric,
>
> On Apr 9, 2009, at 11:18 AM, Eric Kow wrote:
>
> > On Thu, Apr 09, 2009 at 18:57:29 +0100, Eric Kow wrote:
> >> This is where Kevin Ollivier of wxWidgets pointed out something
> >> interesting: in the current wxWidgets trunk, it should be possible to
> >> automatically generate the C bindings from the Doxygen XML output.
> >> In
> >> fact, he has already done something similar for Python, metadata to
> >> Python objects:
> >>
> >> http://trac.wxwidgets.org/browser/wxWidgets/trunk/docs/doxygen/doxymlparser.py
> >
> > Following up on this, I did
> >
> > svn checkout http://svn.wxwidgets.org/svn/wx/wxWidgets/trunk
> > wxWidgets
> > cd wxWidgets/doc/doxygen
> > ./regen.sh
> > python doxymlparser.py --report out/xml/classwx_button.xml
> >
> > Attached is the XML file (input) and the output of this script.
> >
> > Here is a small extract of the output:
> >
> > Class: wxButton
> > Bases: wxControl
> > Inlcudes: []
> > Brief Description:
> >
> > And...
> >
> > Method: SetLabel
> > Return Type: void
> > Params: [{u'type': u'const&', u'declname': u'label'}]
> > Prototype: void wxButton::SetLabel(const wxString &label)
> > Brief Description:
> >
> > What can we do with this?
>
> As a start, with a few lines of Python code after the
> doxyparser.parse(file) calls in the script, you can do something like:
>
> # start code to autogenerate wxc.h
> wxc_header = ""
>
> for aclass in doxyparse.classes:
> for amethod in methods:
> self_ref = "TSelf"
> if amethod.name == "Create":
> self_ref = "TClass"
> wxc_header += "%s(%s) " % (self_ref, aclass.name)
> else:
> wxc_header += "%s " %
> (wxc_type_for_type(amethod.return_type)
>
> wxc_header += "%s_%s( %s _obj" % (aclass.name, amethod.name,
> self_ref + (" + aclass.name + ")")
>
> for param in amethod.params:
> wxc_header += ", %s %s" %
> (wxc_type_for_type(param["type"]), "_" +
> param["declname"])
> # Note: uncomment this if you support adding default
> values
> # if "defval" in param:
> # wxc_header += "=" + param["defval"]
> wxc_header += " );\n"
>
> wxc_file = open("wxc.h", "wb")
> wxc_file.write(wxc_header)
> wxc_file.close()
>
> # end code
>
> This is all just pseudo-code, and methods like wxc_type_for_type would
> need implemented, and you'd also need to probably work out some
> special logic for constructors, a list of classes to exclude, etc. but
> this should give you an idea of how to start things off. Ideally you'd
> actually have your own generate_c_bindings.py file that does an
> "import doxyparser", then runs "doxyparse.parse()" itself rather than
> extending the doxymlparser.py script, but anyway, just some ideas.
I have made an initial attempt at a c_wrapper.py program. It is far from
finished, but like the XSLT program, I did it to see if it was feasible.
I have attached the program.
My initial imprecision is that this could work out. Python is a very
nice language, and it was a joy to make my little program. I am already
further along than with the XSLT program, and I have spend a third of
the time. And more importantly, it did not feel painful at all.
I had to change doxymlparser.py a bit though, otherwise we get
type-names like constwxString:
> svn diff:
Index: doxymlparser.py
===================================================================
--- doxymlparser.py (revision 60099)
+++ doxymlparser.py (working copy)
@@ -98,7 +98,11 @@
if child.nodeType == child.ELEMENT_NODE and child.nodeName == "ref":
text += getTextValue(child)
if child.nodeType == child.TEXT_NODE:
- text += child.nodeValue.strip()
+ #text += child.nodeValue.strip()
+ # We changed line above to remove qualifiers. Maybe we need
another field on parameters?
+ for token in string.split(child.nodeValue.strip()):
+ if (token != "virtual" and token != "static" and token !=
"const"):
+ text += token
return text
Kevin, what do you think about this change?
The output looks like:
> python c_wrapper.py out/xml/classwx_button.xml | indent
/* Constructor */
wxButton wxButton_wxButton ();
/* Constructor */
wxButton wxButton_wxButton (wxWindow * _parent, wxWindowID _id,
wxString & _label, wxPoint & _pos,
wxSize & _size, long _style,
wxValidator & _validator, wxString & _name);
void wxButton_Destruct (wxButton * _obj);
bool wxButton_Create (wxButton _obj, wxWindow * _parent, wxWindowID _id,
wxString & _label, wxPoint & _pos, wxSize & _size,
long _style, wxValidator & _validator,
wxString & _name);
wxString wxButton_GetLabel (wxButton _obj);
wxWindow *wxButton_SetDefault (wxButton _obj);
void wxButton_SetLabel (wxButton _obj, wxString & _label);
wxSize wxButton_GetDefaultSize (wxButton _obj);
Greetings,
Mads Lindstrøm
"""
Name: c_wrapper.py
Author: Mads Lindstroem
License: wxWidgets License
"""
#!/usr/bin/env python
import doxymlparser
import optparse
import sys
parser = optparse.OptionParser(usage="usage: %prog <doxyml files to parse>\n" , version="%prog 1.0")
options, arguments = parser.parse_args()
def wxc_type_for_type(type):
return type
if __name__ == "__main__":
if len(arguments) < 1:
parser.print_usage()
sys.exit(1)
doxyparse = doxymlparser.DoxyMLParser()
for arg in arguments:
doxyparse.parse(arg)
# for aclass in doxyparse.classes:
# print str(aclass)
wxc_header = "/* \n\n Start of c-output \n\n */ \n"
for aclass in doxyparse.classes:
for amethod in aclass.methods:
#wxc_header += str(amethod)
this_type = wxc_type_for_type(aclass.name)
print "Methodname %s Methodname" % (amethod.name)
if amethod.name == aclass.name:
wxc_header += "/* Constructor */\n"
wxc_header += "%s %s_%s(" % (this_type, this_type, this_type)
set_comma = False
elif amethod.name == "~" + aclass.name :
wxc_header += "void %s_Destruct(%s * _obj" % (this_type, this_type)
set_comma = True
else:
wxc_header += "%s %s_%s(%s _obj" % \
( wxc_type_for_type(amethod.return_type), aclass.name, amethod.name, this_type)
set_comma = True
for param in amethod.params:
if set_comma:
wxc_header += ", "
wxc_header += "%s %s" % (wxc_type_for_type(param["type"]), "_" + param["declname"])
set_comma = True
# Note: uncomment this if you support adding default values
# if "defval" in param:
# wxc_header += "=" + param["defval"]
wxc_header += " );\n"
print wxc_header
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