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import re
import string
def format_as_python(var):
if var[0] in string.uppercase:
var = var[0].lower() + var[1:]
return var
def format_as_underscored(var):
def rep(s):
return s.group(0)[0] + '_' + s.group(1).lower()
var = re.sub(r'[a-z0-9]([A-Z])', rep, var).lower()
var = var.replace('id_wsf2_', 'idwsf2_')
var = var.replace('_saslresponse', '_sasl_response')
return var
def format_underscore_as_py(var):
def rep(s):
return s.group(1)[0].upper() + s.group(1)[1:]
var = re.sub(r'_([A-Za-z0-9]+)', rep, var)
return var
class PythonBinding:
def __init__(self, binding_data):
self.binding_data = binding_data
def generate(self):
fd = open('python/lasso.py', 'w')
self.generate_header(fd)
for clss in self.binding_data.structs:
self.generate_class(clss, fd)
fd.close()
fd = open('python/_lasso.c', 'w')
self.generate_wrapper(fd)
fd.close()
def generate_header(self, fd):
print >> fd, '''\
# this file has been generated automatically; do not edit
import _lasso
_lasso.init()
'''
def generate_class(self, clss, fd):
klassname = clss.name[5:] # remove Lasso from class name
if clss.parent == 'GObject':
parentname = 'object'
else:
parentname = clss.parent[5:]
print >> fd, '''class %(klassname)s(%(parentname)s):''' % locals()
if not clss.members and not clss.methods:
print >> fd, ' pass'
print >> fd, ''
return
methods = clss.methods[:]
# constructor(s)
method_prefix = 'lasso_' + format_as_underscored(klassname) + '_'
for m in self.binding_data.functions:
if m.name == method_prefix + 'new':
args = oargs = ', '.join([x[1] for x in m.args[1:]])
if oargs:
oargs = ', ' + oargs
print >> fd, ' def __init__(self%s):' % oargs
print >> fd, ' self._cptr = _lasso.%s(%s)' % (
m.name[6:], args)
print >> fd, ''
for m in self.binding_data.functions:
if m.name == method_prefix + 'new_from_dump':
print >> fd, ' @classmethod'
print >> fd, ' def newFromDump(cls, dump):'
print >> fd, ' obj = cls()'
print >> fd, ' obj._cptr = _lasso.%s(dump)' % m.name[6:]
print >> fd, ' if obj._cptr is None:'
print >> fd, ' raise "XXX"'
print >> fd, ''
elif m.name == method_prefix + 'new_full':
pass
# create properties for members
for m in clss.members:
mname = format_as_python(m[1])
print >> fd, ' def get_%s(self):' % mname
print >> fd, ' return _lasso.%s_%s_get(self._cptr)' % (
klassname, mname)
print >> fd, ' def set_%s(self, value):' % mname
print >> fd, ' _lasso.%s_%s_set(self._cptr, value)' % (
klassname, mname)
print >> fd, ' %s = property(get_%s, set_%s)' % (mname, mname, mname)
print >> fd, ''
# first pass on methods, getting accessors
for m in clss.methods:
if not ('_get_' in m.name and len(m.args) == 1):
continue
methods.remove(m)
try:
setter_name = m.name.replace('_get_', '_set_')
setter = [x for x in methods if x.name == setter_name][0]
methods.remove(setter)
except IndexError:
setter = None
mname = re.match(r'lasso_.*_get_(\w+)', m.name).group(1)
print >> fd, ' def get_%s(self):' % mname
print >> fd, ' return _lasso.%s(self._cptr)' % m.name[6:]
if setter:
print >> fd, ' def set_%s(self, value):' % mname
print >> fd, ' _lasso.%s(self._cptr, value)' % setter.name[6:]
print >> fd, ' %s = property(get_%s, set_%s)' % (mname, mname, mname)
else:
print >> fd, ' %s = property(get_%s)' % (mname, mname)
print >> fd, ''
# second pass on methods, real methods
for m in methods:
if m.name.endswith('_new') or m.name.endswith('_new_from_dump') or \
m.name.endswith('_new_full'):
continue
if not m.name.startswith(method_prefix):
print 'W:', m.name, 'vs', method_prefix
continue
mname = m.name[len(method_prefix):]
args = ', '.join([x[1] for x in m.args[1:]])
if args:
args = ', ' + args
print >> fd, ' def %s(self%s):' % (format_underscore_as_py(mname), args)
if m.return_type == 'void':
print >> fd, ' _lasso.%s(self._cptr%s)' % (
m.name[6:], args)
elif m.return_type in ('gint', 'int'):
print >> fd, ' rc = _lasso.%s(self._cptr%s)' % (
m.name[6:], args)
print >> fd, ' if rc == 0:'
print >> fd, ' return'
print >> fd, ' elif rc > 0:' # recoverable error
print >> fd, ' return rc'
print >> fd, ' elif rc < 0:' # unrecoverable error
print >> fd, ' raise \'XXX(rc)\'' # XXX: exception hierarchy
else:
print >> fd, ' return _lasso.%s(self._cptr%s)' % (
m.name[6:], args)
print >> fd, ''
print >> fd, ''
def generate_wrapper(self, fd):
print >> fd, open('lang_python_wrapper_top.c').read()
for h in self.binding_data.headers:
print >> fd, '#include <%s>' % h
print >> fd, ''
self.wrapper_list = []
for m in self.binding_data.functions:
self.generate_function_wrapper(m, fd)
for c in self.binding_data.structs:
self.generate_member_wrapper(c, fd)
for m in c.methods:
self.generate_function_wrapper(m, fd)
self.generate_wrapper_list(fd)
print >> fd, open('lang_python_wrapper_bottom.c').read()
def generate_member_wrapper(self, c, fd):
klassname = c.name
for m in c.members:
mname = format_as_python(m[1])
# getter
print >> fd, '''static PyObject*
%s_%s_get(PyObject *self, PyObject *args)
{''' % (klassname[5:], mname)
self.wrapper_list.append('%s_%s_get' % (klassname[5:], mname))
print >> fd, ' %s return_value;' % m[0]
print >> fd, ' PyObject* return_pyvalue;'
print >> fd, ' PyGObjectPtr* cvt_this;'
print >> fd, ' %s* this;' % klassname
print >> fd, ' if (! PyArg_ParseTuple(args, "O", &cvt_this)) return NULL;'
print >> fd, ' this = (%s*)cvt_this->obj;' % klassname
print >> fd, ' return_value = this->%s;' % m[1];
self.return_value(fd, m[0])
print >> fd, '}'
print >> fd, ''
# setter
print >> fd, '''static PyObject*
%s_%s_set(PyObject *self, PyObject *args)
{''' % (klassname[5:], mname)
self.wrapper_list.append('%s_%s_set' % (klassname[5:], mname))
print >> fd, ' PyGObjectPtr* cvt_this;'
print >> fd, ' %s* this;' % klassname
arg_type = m[0]
if m[0] in ('char*', 'const char*', 'gchar*', 'const gchar*'):
arg_type = arg_type.replace('const ', '')
parse_format = 's'
parse_arg = '&value'
print >> fd, ' %s value;' % arg_type
elif arg_type in ['int', 'gint', 'gboolean', 'const gboolean'] + self.binding_data.enums:
parse_format = 'i'
parse_arg = '&value'
print >> fd, ' %s value;' % arg_type
else:
parse_format = 'O'
print >> fd, ' %s value;' % arg_type
print >> fd, ' PyGObjectPtr *cvt_value;'
parse_arg = '&cvt_value'
print >> fd, ' if (! PyArg_ParseTuple(args, "O%s", &cvt_this, %s)) return NULL;' %(
parse_format, parse_arg)
print >> fd, ' this = (%s*)cvt_this->obj;' % klassname
if parse_format == 'i':
print >> fd, ' this->%s = value;' % m[1]
elif parse_format == 's':
print >> fd, ' this->%s = g_strdup(value);' % m[1]
print >> fd, ' free(value);'
elif parse_format == 'O':
print >> fd, ' this->%s = (%s)g_object_ref(cvt_value->obj);' % (m[1], m[0])
print >> fd, ' Py_INCREF(Py_None);'
print >> fd, ' return Py_None;'
print >> fd, '}'
print >> fd, ''
def return_value(self, fd, vtype):
if vtype == 'gboolean':
print >> fd, ' if (return_value) {'
print >> fd, ' Py_INCREF(Py_True);'
print >> fd, ' return Py_True;'
print >> fd, ' } else {'
print >> fd, ' Py_INCREF(Py_False);'
print >> fd, ' return Py_False;'
print >> fd, ' }'
elif vtype in ('int', 'gint'):
print >> fd, ' return_pyvalue = PyInt_FromLong(return_value);'
print >> fd, ' Py_INCREF(return_pyvalue);'
print >> fd, ' return return_pyvalue;'
elif vtype in ('char*', 'gchar*'):
print >> fd, ' if (return_value) {'
print >> fd, ' return_pyvalue = PyString_FromString(return_value);'
print >> fd, ' Py_INCREF(return_pyvalue);'
print >> fd, ' return return_pyvalue;'
print >> fd, ' } else {'
print >> fd, ' Py_INCREF(Py_None);'
print >> fd, ' return Py_None;'
print >> fd, ' }'
else:
print >> fd, ' if (return_value) {'
print >> fd, ' return_pyvalue = PyGObjectPtr_New(G_OBJECT(return_value));'
print >> fd, ' Py_INCREF(return_pyvalue);'
print >> fd, ' return return_pyvalue;'
print >> fd, ' } else {'
print >> fd, ' Py_INCREF(Py_None);'
print >> fd, ' return Py_None;'
print >> fd, ' }'
def generate_function_wrapper(self, m, fd):
name = m.name[6:]
self.wrapper_list.append(name)
print >> fd, '''static PyObject*
%s(PyObject *self, PyObject *args)
{''' % name
parse_tuple_format = []
parse_tuple_args = []
for arg in m.args:
arg_type, arg_name = arg
print >> fd, ' %s %s;' % (arg[0], arg[1])
if arg_type in ('char*', 'const char*', 'gchar*', 'const gchar*'):
arg_type = arg_type.replace('const ', '')
parse_tuple_format.append('s')
parse_tuple_args.append('&%s' % arg_name)
elif arg_type in ['int', 'gint', 'gboolean', 'const gboolean'] + self.binding_data.enums:
parse_tuple_format.append('i')
parse_tuple_args.append('&%s' % arg_name)
else:
parse_tuple_format.append('O')
print >> fd, ' PyGObjectPtr *cvt_%s;' % arg_name
parse_tuple_args.append('&cvt_%s' % arg_name)
if m.return_type:
print >> fd, ' %s return_value;' % m.return_type
print >> fd, ' PyObject* return_pyvalue;'
print >> fd, ''
parse_tuple_args = ', '.join(parse_tuple_args)
if parse_tuple_args:
parse_tuple_args = ', ' + parse_tuple_args
print >> fd, ' if (! PyArg_ParseTuple(args, "%s"%s)) return NULL;' % (
''.join(parse_tuple_format), parse_tuple_args)
for f, arg in zip(parse_tuple_format, m.args):
if f == 'O':
print >> fd, ' %s = (%s)cvt_%s->obj;' % (arg[1], arg[0], arg[1])
if m.return_type:
print >> fd, ' return_value =',
print >> fd, '%s(%s);' % (m.name, ', '.join([x[1] for x in m.args]))
if not m.return_type:
print >> fd, ' Py_INCREF(Py_None);'
print >> fd, ' return Py_None;'
else:
self.return_value(fd, m.return_type)
print >> fd, '''}
'''
def generate_wrapper_list(self, fd):
print >> fd, '''
static PyMethodDef lasso_methods[] = {'''
for m in self.wrapper_list:
print >> fd, ' {"%s", %s, METH_VARARGS, NULL},' % (m, m)
print >> fd, ' {NULL, NULL, 0, NULL}'
print >> fd, '};'
print >> fd, ''
|
