1 #!/usr/bin/python 2 # 3 # Copyright (C) 2009 Google Inc. All rights reserved. 4 # 5 # Redistribution and use in source and binary forms, with or without 6 # modification, are permitted provided that the following conditions are 7 # met: 8 # 9 # * Redistributions of source code must retain the above copyright 10 # notice, this list of conditions and the following disclaimer. 11 # * Redistributions in binary form must reproduce the above 12 # copyright notice, this list of conditions and the following disclaimer 13 # in the documentation and/or other materials provided with the 14 # distribution. 15 # * Neither the name of Google Inc. nor the names of its 16 # contributors may be used to endorse or promote products derived from 17 # this software without specific prior written permission. 18 # 19 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 # 31 # Copyright (c) 2009 The Chromium Authors. All rights reserved. 32 # Use of this source code is governed by a BSD-style license that can be 33 # found in the LICENSE file. 34 35 # usage: rule_bison.py INPUT_FILE OUTPUT_DIR 36 # INPUT_FILE is a path to either CSSGrammar.y or XPathGrammar.y. 37 # OUTPUT_DIR is where the bison-generated .cpp and .h files should be placed. 38 39 import errno 40 import os 41 import os.path 42 import subprocess 43 import sys 44 45 assert len(sys.argv) == 3 46 47 inputFile = sys.argv[1] 48 outputDir = sys.argv[2] 49 50 inputName = os.path.basename(inputFile) 51 assert inputName == 'CSSGrammar.y' or inputName == 'XPathGrammar.y' 52 prefix = {'CSSGrammar.y': 'cssyy', 'XPathGrammar.y': 'xpathyy'}[inputName] 53 54 (inputRoot, inputExt) = os.path.splitext(inputName) 55 56 # The generated .h will be in a different location depending on the bison 57 # version. 58 outputHTries = [ 59 os.path.join(outputDir, inputRoot + '.cpp.h'), 60 os.path.join(outputDir, inputRoot + '.hpp'), 61 ] 62 63 for outputHTry in outputHTries: 64 try: 65 os.unlink(outputHTry) 66 except OSError, e: 67 if e.errno != errno.ENOENT: 68 raise 69 70 outputCpp = os.path.join(outputDir, inputRoot + '.cpp') 71 72 returnCode = subprocess.call(['bison', '-d', '-p', prefix, inputFile, '-o', outputCpp]) 73 assert returnCode == 0 74 75 # Find the name that bison used for the generated header file. 76 outputHTmp = None 77 for outputHTry in outputHTries: 78 try: 79 os.stat(outputHTry) 80 outputHTmp = outputHTry 81 break 82 except OSError, e: 83 if e.errno != errno.ENOENT: 84 raise 85 86 assert outputHTmp != None 87 88 # Read the header file in under the generated name and remove it. 89 outputHFile = open(outputHTmp) 90 outputHContents = outputHFile.read() 91 outputHFile.close() 92 os.unlink(outputHTmp) 93 94 # Rewrite the generated header with #include guards. 95 outputH = os.path.join(outputDir, inputRoot + '.h') 96 97 outputHFile = open(outputH, 'w') 98 print >>outputHFile, '#ifndef %sH' % inputRoot 99 print >>outputHFile, '#define %sH' % inputRoot 100 print >>outputHFile, outputHContents 101 print >>outputHFile, '#endif' 102 outputHFile.close() 103
