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# -*- coding: utf-8 -*-
#
# File : preprocessor.py
# This file is part of RT-Thread RTOS
# COPYRIGHT (C) 2006 - 2025, RT-Thread Development Team
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Change Logs:
# Date Author Notes
# 2025-01-05 Assistant Extract SCons PreProcessor patch to independent class
from SCons.Script import *
class SConsPreProcessorPatch:
"""
SCons PreProcessor patch class
This class provides methods to patch the SCons PreProcessor
to handle conditional compilation directives properly.
"""
def __init__(self):
"""Initialize the PreProcessor patch"""
self._patched_preprocessor = None
self._apply_patch()
def _apply_patch(self):
"""
Apply the patch to SCons PreProcessor
This method patches the SCons.cpp.PreProcessor class with
custom methods for handling includes during conditional compilation.
"""
from SCons import cpp
# Store reference to original PreProcessor
self._patched_preprocessor = cpp.PreProcessor
# Create bound methods for the patch
def start_handling_includes(preprocessor_self, t=None):
d = preprocessor_self.dispatch_table
p = preprocessor_self.stack[-1] if preprocessor_self.stack else preprocessor_self.default_table
for k in ('import', 'include', 'include_next', 'define'):
d[k] = p[k]
def stop_handling_includes(preprocessor_self, t=None):
d = preprocessor_self.dispatch_table
d['import'] = preprocessor_self.do_nothing
d['include'] = preprocessor_self.do_nothing
d['include_next'] = preprocessor_self.do_nothing
d['define'] = preprocessor_self.do_nothing
# Apply the patch methods
self._patched_preprocessor.start_handling_includes = start_handling_includes
self._patched_preprocessor.stop_handling_includes = stop_handling_includes
def get_patched_preprocessor(self):
return self._patched_preprocessor
def create_preprocessor_instance(self):
return self._patched_preprocessor()
# Global instance for easy access
_preprocessor_patch = None
def get_patched_preprocessor():
global _preprocessor_patch
if _preprocessor_patch is None:
_preprocessor_patch = SConsPreProcessorPatch()
return _preprocessor_patch.get_patched_preprocessor()
def create_preprocessor_instance():
global _preprocessor_patch
if _preprocessor_patch is None:
_preprocessor_patch = SConsPreProcessorPatch()
return _preprocessor_patch.create_preprocessor_instance()
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