1643ca7872b450ea4efacab6188849e5aac2ba161Steve Block#!/usr/bin/python 2643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# 3643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# Copyright (C) 2009 Google Inc. All rights reserved. 4643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# 5643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# Redistribution and use in source and binary forms, with or without 6643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# modification, are permitted provided that the following conditions are 7643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# met: 8643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# 9643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# * Redistributions of source code must retain the above copyright 10643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# notice, this list of conditions and the following disclaimer. 11643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# * Redistributions in binary form must reproduce the above 12643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# copyright notice, this list of conditions and the following disclaimer 13643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# in the documentation and/or other materials provided with the 14643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# distribution. 15643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# * Neither the name of Google Inc. nor the names of its 16643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# contributors may be used to endorse or promote products derived from 17643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# this software without specific prior written permission. 18643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# 19643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# 31643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# Copyright (c) 2009 The Chromium Authors. All rights reserved. 32643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# Use of this source code is governed by a BSD-style license that can be 33643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# found in the LICENSE file. 34643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 35643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# usage: rule_bison.py INPUT_FILE OUTPUT_DIR 36643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# INPUT_FILE is a path to either CSSGrammar.y or XPathGrammar.y. 37643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# OUTPUT_DIR is where the bison-generated .cpp and .h files should be placed. 38643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 39643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockimport errno 40643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockimport os 41643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockimport os.path 42643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockimport subprocess 43643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockimport sys 44643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 45643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockassert len(sys.argv) == 3 46643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 47643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockinputFile = sys.argv[1] 48643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputDir = sys.argv[2] 49643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 50643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockinputName = os.path.basename(inputFile) 51643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockassert inputName == 'CSSGrammar.y' or inputName == 'XPathGrammar.y' 52643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockprefix = {'CSSGrammar.y': 'cssyy', 'XPathGrammar.y': 'xpathyy'}[inputName] 53643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 54643ca7872b450ea4efacab6188849e5aac2ba161Steve Block(inputRoot, inputExt) = os.path.splitext(inputName) 55643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 56643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# The generated .h will be in a different location depending on the bison 57643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# version. 58643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputHTries = [ 59643ca7872b450ea4efacab6188849e5aac2ba161Steve Block os.path.join(outputDir, inputRoot + '.cpp.h'), 60643ca7872b450ea4efacab6188849e5aac2ba161Steve Block os.path.join(outputDir, inputRoot + '.hpp'), 61643ca7872b450ea4efacab6188849e5aac2ba161Steve Block] 62643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 63643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockfor outputHTry in outputHTries: 64643ca7872b450ea4efacab6188849e5aac2ba161Steve Block try: 65643ca7872b450ea4efacab6188849e5aac2ba161Steve Block os.unlink(outputHTry) 66643ca7872b450ea4efacab6188849e5aac2ba161Steve Block except OSError, e: 67643ca7872b450ea4efacab6188849e5aac2ba161Steve Block if e.errno != errno.ENOENT: 68643ca7872b450ea4efacab6188849e5aac2ba161Steve Block raise 69643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 70643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputCpp = os.path.join(outputDir, inputRoot + '.cpp') 71643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 72643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockreturnCode = subprocess.call(['bison', '-d', '-p', prefix, inputFile, '-o', outputCpp]) 73643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockassert returnCode == 0 74643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 75643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# Find the name that bison used for the generated header file. 76643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputHTmp = None 77643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockfor outputHTry in outputHTries: 78643ca7872b450ea4efacab6188849e5aac2ba161Steve Block try: 79643ca7872b450ea4efacab6188849e5aac2ba161Steve Block os.stat(outputHTry) 80643ca7872b450ea4efacab6188849e5aac2ba161Steve Block outputHTmp = outputHTry 81643ca7872b450ea4efacab6188849e5aac2ba161Steve Block break 82643ca7872b450ea4efacab6188849e5aac2ba161Steve Block except OSError, e: 83643ca7872b450ea4efacab6188849e5aac2ba161Steve Block if e.errno != errno.ENOENT: 84643ca7872b450ea4efacab6188849e5aac2ba161Steve Block raise 85643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 86643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockassert outputHTmp != None 87643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 88643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# Read the header file in under the generated name and remove it. 89643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputHFile = open(outputHTmp) 90643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputHContents = outputHFile.read() 91643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputHFile.close() 92643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockos.unlink(outputHTmp) 93643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 94643ca7872b450ea4efacab6188849e5aac2ba161Steve Block# Rewrite the generated header with #include guards. 95643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputH = os.path.join(outputDir, inputRoot + '.h') 96643ca7872b450ea4efacab6188849e5aac2ba161Steve Block 97643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputHFile = open(outputH, 'w') 98643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockprint >>outputHFile, '#ifndef %sH' % inputRoot 99643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockprint >>outputHFile, '#define %sH' % inputRoot 100643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockprint >>outputHFile, outputHContents 101643ca7872b450ea4efacab6188849e5aac2ba161Steve Blockprint >>outputHFile, '#endif' 102643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockoutputHFile.close() 103