Reland "Implement trigonometric functions using a fdlibm port."

tools/js2c.py

 #!/usr/bin/env python
 #
 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 200 matching lines @@
     macro = TextMacro(args, body)
 
     # advance position to where the macro defintion was
     pos = macro_match.start()
 
     def non_expander(s):
       return s
     lines = ExpandMacroDefinition(lines, pos, name_pattern, macro, non_expander)
 
 
+INLINE_CONSTANT_PATTERN = re.compile(r'const\s+([a-zA-Z0-9_]+)\s*=\s*([^;\n]+)[;\n]')
+
+def ExpandInlineConstants(lines):
+  pos = 0
+  while True:
+    const_match = INLINE_CONSTANT_PATTERN.search(lines, pos)
+    if const_match is None:
+      # no more constants
+      return lines
+    name = const_match.group(1)
+    replacement = const_match.group(2)
+    name_pattern = re.compile("\\b%s\\b" % name)
+
+    # remove constant definition and replace
+    lines = (lines[:const_match.start()] +
+             re.sub(name_pattern, replacement, lines[const_match.end():]))
+
+    # advance position to where the constant defintion was
+    pos = const_match.start()
+
+
 HEADER_TEMPLATE = """\
 // Copyright 2011 Google Inc. All Rights Reserved.
 
 // This file was generated from .js source files by GYP.  If you
 // want to make changes to this file you should either change the
 // javascript source files or the GYP script.
 
 #include "src/v8.h"
 #include "src/natives.h"
 #include "src/utils.h"
@@ skipping 95 matching lines @@
   filter_chain = [ReadFile]
 
   if macro_filename:
     (consts, macros) = ReadMacros(ReadFile(macro_filename))
     filter_chain.append(lambda l: ExpandConstants(l, consts))
     filter_chain.append(lambda l: ExpandMacros(l, macros))
 
   filter_chain.extend([
     RemoveCommentsAndTrailingWhitespace,
     ExpandInlineMacros,
+    ExpandInlineConstants,
     Validate,
     jsmin.JavaScriptMinifier().JSMinify
   ])
 
   def chain(f1, f2):
     return lambda x: f2(f1(x))
 
   return reduce(chain, filter_chain)
 
 
@@ skipping 201 matching lines @@
       type: type parameter for NativesCollection template.
       compression: type of compression used. [off|bz2]
       sources.js: JS internal sources or macros.py.""")
   (options, args) = parser.parse_args()
 
   JS2C(args[3:], args[0], args[1], args[2], options.raw, options.startup_blob)
 
 
 if __name__ == "__main__":
   main()