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# -*- Mode: Python -*-
# GObject-Introspection - a framework for introspecting GObject libraries
# Copyright (C) 2010 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
from __future__ import with_statement
from contextlib import contextmanager
from . import ast
class CCodeGenerator(object):
def __init__(self, namespace, out_h_filename, out_c_filename):
self.out_h_filename = out_h_filename
self.out_c_filename = out_c_filename
self._function_bodies = {}
self.namespace = namespace
def gen_symbol(self, name):
name = name.replace(' ', '_')
return '%s_%s' % (self.namespace.symbol_prefixes[0], name)
def _typecontainer_to_ctype(self, param):
if (isinstance(param, ast.Parameter) and
param.direction in (ast.PARAM_DIRECTION_OUT,
ast.PARAM_DIRECTION_INOUT)):
suffix = '*'
else:
suffix = ''
if (param.type.is_equiv((ast.TYPE_STRING, ast.TYPE_FILENAME)) and
param.transfer == ast.PARAM_TRANSFER_NONE):
return "const gchar*" + suffix
return param.type.ctype + suffix
def _write_prelude(self, out, func):
out.write("""
%s
%s (""" % (self._typecontainer_to_ctype(func.retval), func.symbol))
l = len(func.parameters)
if func.parameters:
for i, param in enumerate(func.parameters):
ctype = self._typecontainer_to_ctype(param)
out.write('%s %s' % (ctype, param.argname))
if i < l - 1:
out.write(", ")
else:
out.write('void')
out.write(")")
def _write_prototype(self, func):
self._write_prelude(self.out_h, func)
self.out_h.write(";\n\n")
def _write_annotation_transfer(self, transfer):
self.out_c.write("(transfer %s)" % (transfer, ))
def _write_docs(self, func):
self.out_c.write("/**\n * %s:\n" % (func.symbol, ))
for param in func.parameters:
self.out_c.write(" * @%s: " % (param.argname, ))
if param.direction in (ast.PARAM_DIRECTION_OUT,
ast.PARAM_DIRECTION_INOUT):
if param.caller_allocates:
allocate_string = ' caller-allocates'
else:
allocate_string = ''
self.out_c.write("(%s%s) " % (param.direction,
allocate_string))
self._write_annotation_transfer(param.transfer)
self.out_c.write(":\n")
self.out_c.write(' *\n')
self.out_c.write(' * Undocumented.\n')
self.out_c.write(' *\n')
self.out_c.write(' * Returns: ')
self._write_annotation_transfer(func.retval.transfer)
self.out_c.write('\n */')
@contextmanager
def _function(self, func):
self._write_prototype(func)
self._write_docs(func)
self._write_prelude(self.out_c, func)
self.out_c.write("\n{\n")
yield
self.out_c.write("}\n\n")
def _codegen_start(self):
warning = '/* GENERATED BY testcodegen.py; DO NOT EDIT */\n\n'
self.out_h.write(warning)
nsupper = self.namespace.name.upper()
self.out_h.write("""
#ifndef __%s_H__
#define __%s_H__
#include <glib-object.h>
""" % (nsupper, nsupper))
self.out_c.write(warning)
self.out_c.write("""#include "%s"\n\n""" % (self.out_h_filename, ))
def _codegen_end(self):
self.out_h.write("""#endif\n""")
self.out_h.close()
self.out_c.close()
def set_function_body(self, node, body):
assert isinstance(node, ast.Function)
self._function_bodies[node] = body
def codegen(self):
self.out_h = open(self.out_h_filename, 'w')
self.out_c = open(self.out_c_filename, 'w')
self._codegen_start()
for node in self.namespace.itervalues():
if isinstance(node, ast.Function):
with self._function(node):
body = self._function_bodies.get(node)
if not body:
body = ''
self.out_c.write(body)
self._codegen_end()
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