Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | # |
| 3 | # Copyright 2013 the V8 project authors. All rights reserved. |
| 4 | # Redistribution and use in source and binary forms, with or without |
| 5 | # modification, are permitted provided that the following conditions are |
| 6 | # met: |
| 7 | # |
| 8 | # * Redistributions of source code must retain the above copyright |
| 9 | # notice, this list of conditions and the following disclaimer. |
| 10 | # * Redistributions in binary form must reproduce the above |
| 11 | # copyright notice, this list of conditions and the following |
| 12 | # disclaimer in the documentation and/or other materials provided |
| 13 | # with the distribution. |
| 14 | # * Neither the name of Google Inc. nor the names of its |
| 15 | # contributors may be used to endorse or promote products derived |
| 16 | # from this software without specific prior written permission. |
| 17 | # |
| 18 | # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 | # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 22 | # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 23 | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 24 | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 | # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | |
| 30 | """ |
| 31 | Generates shim headers that mirror the directory structure of bundled headers, |
| 32 | but just forward to the system ones. |
| 33 | |
| 34 | This allows seamless compilation against system headers with no changes |
| 35 | to our source code. |
| 36 | """ |
| 37 | |
| 38 | |
| 39 | import optparse |
| 40 | import os.path |
| 41 | import sys |
| 42 | |
| 43 | |
| 44 | def GeneratorMain(argv): |
| 45 | parser = optparse.OptionParser() |
| 46 | parser.add_option('--headers-root', action='append') |
| 47 | parser.add_option('--define', action='append') |
| 48 | parser.add_option('--output-directory') |
| 49 | parser.add_option('--prefix', default='') |
| 50 | parser.add_option('--use-include-next', action='store_true') |
| 51 | parser.add_option('--outputs', action='store_true') |
| 52 | parser.add_option('--generate', action='store_true') |
| 53 | |
| 54 | options, args = parser.parse_args(argv) |
| 55 | |
| 56 | if not options.headers_root: |
| 57 | parser.error('Missing --headers-root parameter.') |
| 58 | if not options.output_directory: |
| 59 | parser.error('Missing --output-directory parameter.') |
| 60 | if not args: |
| 61 | parser.error('Missing arguments - header file names.') |
| 62 | |
| 63 | source_tree_root = os.path.abspath( |
| 64 | os.path.join(os.path.dirname(__file__), '..', '..')) |
| 65 | |
| 66 | for root in options.headers_root: |
| 67 | target_directory = os.path.join( |
| 68 | options.output_directory, |
| 69 | os.path.relpath(root, source_tree_root)) |
| 70 | if options.generate and not os.path.exists(target_directory): |
| 71 | os.makedirs(target_directory) |
| 72 | |
| 73 | for header_spec in args: |
| 74 | if ';' in header_spec: |
| 75 | (header_filename, |
| 76 | include_before, |
| 77 | include_after) = header_spec.split(';', 2) |
| 78 | else: |
| 79 | header_filename = header_spec |
| 80 | include_before = '' |
| 81 | include_after = '' |
| 82 | if options.outputs: |
| 83 | yield os.path.join(target_directory, header_filename) |
| 84 | if options.generate: |
| 85 | with open(os.path.join(target_directory, header_filename), 'w') as f: |
| 86 | if options.define: |
| 87 | for define in options.define: |
| 88 | key, value = define.split('=', 1) |
| 89 | # This non-standard push_macro extension is supported |
| 90 | # by compilers we support (GCC, clang). |
| 91 | f.write('#pragma push_macro("%s")\n' % key) |
| 92 | f.write('#undef %s\n' % key) |
| 93 | f.write('#define %s %s\n' % (key, value)) |
| 94 | |
| 95 | if include_before: |
| 96 | for header in include_before.split(':'): |
| 97 | f.write('#include %s\n' % header) |
| 98 | |
| 99 | include_target = options.prefix + header_filename |
| 100 | if options.use_include_next: |
| 101 | f.write('#include_next <%s>\n' % include_target) |
| 102 | else: |
| 103 | f.write('#include <%s>\n' % include_target) |
| 104 | |
| 105 | if include_after: |
| 106 | for header in include_after.split(':'): |
| 107 | f.write('#include %s\n' % header) |
| 108 | |
| 109 | if options.define: |
| 110 | for define in options.define: |
| 111 | key, value = define.split('=', 1) |
| 112 | # This non-standard pop_macro extension is supported |
| 113 | # by compilers we support (GCC, clang). |
| 114 | f.write('#pragma pop_macro("%s")\n' % key) |
| 115 | |
| 116 | |
| 117 | def DoMain(argv): |
| 118 | return '\n'.join(GeneratorMain(argv)) |
| 119 | |
| 120 | |
| 121 | if __name__ == '__main__': |
| 122 | DoMain(sys.argv[1:]) |