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| 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:]) |
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