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1 # Copyright 2014 The Chromium Authors. All rights reserved. | 1 # Copyright 2014 The Chromium Authors. All rights reserved. |
2 # Use of this source code is governed by a BSD-style license that can be | 2 # Use of this source code is governed by a BSD-style license that can be |
3 # found in the LICENSE file. | 3 # found in the LICENSE file. |
4 | 4 |
5 """Generates a syntax tree from a Mojo IDL file.""" | 5 """Generates a syntax tree from a Mojo IDL file.""" |
6 | 6 |
7 import imp | 7 import imp |
8 import os.path | 8 import os.path |
9 import sys | 9 import sys |
10 | 10 |
11 def _GetDirAbove(dirname): | 11 def _GetDirAbove(dirname): |
12 """Returns the directory "above" this file containing |dirname| (which must | 12 """Returns the directory "above" this file containing |dirname| (which must |
13 also be "above" this file).""" | 13 also be "above" this file).""" |
14 path = os.path.abspath(__file__) | 14 path = os.path.abspath(__file__) |
15 while True: | 15 while True: |
16 path, tail = os.path.split(path) | 16 path, tail = os.path.split(path) |
17 assert tail | 17 assert tail |
18 if tail == dirname: | 18 if tail == dirname: |
19 return path | 19 return path |
20 | 20 |
21 try: | 21 try: |
22 imp.find_module("ply") | 22 imp.find_module("ply") |
23 except ImportError: | 23 except ImportError: |
24 sys.path.append(os.path.join(_GetDirAbove("public"), "public/third_party")) | 24 sys.path.append(os.path.join(_GetDirAbove("mojo"), "third_party")) |
25 from ply import lex | 25 from ply import lex |
26 from ply import yacc | 26 from ply import yacc |
27 | 27 |
28 from ..error import Error | 28 from ..error import Error |
29 from . import ast | 29 from . import ast |
30 from .lexer import Lexer | 30 from .lexer import Lexer |
31 | 31 |
32 | 32 |
33 _MAX_ORDINAL_VALUE = 0xffffffff | 33 _MAX_ORDINAL_VALUE = 0xffffffff |
34 _MAX_ARRAY_SIZE = 0xffffffff | 34 _MAX_ARRAY_SIZE = 0xffffffff |
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415 | 415 |
416 def Parse(source, filename): | 416 def Parse(source, filename): |
417 lexer = Lexer(filename) | 417 lexer = Lexer(filename) |
418 parser = Parser(lexer, source, filename) | 418 parser = Parser(lexer, source, filename) |
419 | 419 |
420 lex.lex(object=lexer) | 420 lex.lex(object=lexer) |
421 yacc.yacc(module=parser, debug=0, write_tables=0) | 421 yacc.yacc(module=parser, debug=0, write_tables=0) |
422 | 422 |
423 tree = yacc.parse(source) | 423 tree = yacc.parse(source) |
424 return tree | 424 return tree |
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