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Diffstat (limited to 'couchjs/scons/scons-local-2.0.1/SCons/Scanner/C.py')
-rw-r--r-- | couchjs/scons/scons-local-2.0.1/SCons/Scanner/C.py | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/couchjs/scons/scons-local-2.0.1/SCons/Scanner/C.py b/couchjs/scons/scons-local-2.0.1/SCons/Scanner/C.py new file mode 100644 index 00000000..3ac769ae --- /dev/null +++ b/couchjs/scons/scons-local-2.0.1/SCons/Scanner/C.py @@ -0,0 +1,132 @@ +"""SCons.Scanner.C + +This module implements the depenency scanner for C/C++ code. + +""" + +# +# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 The SCons Foundation +# +# Permission is hereby granted, free of charge, to any person obtaining +# a copy of this software and associated documentation files (the +# "Software"), to deal in the Software without restriction, including +# without limitation the rights to use, copy, modify, merge, publish, +# distribute, sublicense, and/or sell copies of the Software, and to +# permit persons to whom the Software is furnished to do so, subject to +# the following conditions: +# +# The above copyright notice and this permission notice shall be included +# in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY +# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE +# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +# + +__revision__ = "src/engine/SCons/Scanner/C.py 5134 2010/08/16 23:02:40 bdeegan" + +import SCons.Node.FS +import SCons.Scanner +import SCons.Util + +import SCons.cpp + +class SConsCPPScanner(SCons.cpp.PreProcessor): + """ + SCons-specific subclass of the cpp.py module's processing. + + We subclass this so that: 1) we can deal with files represented + by Nodes, not strings; 2) we can keep track of the files that are + missing. + """ + def __init__(self, *args, **kw): + SCons.cpp.PreProcessor.__init__(self, *args, **kw) + self.missing = [] + def initialize_result(self, fname): + self.result = SCons.Util.UniqueList([fname]) + def finalize_result(self, fname): + return self.result[1:] + def find_include_file(self, t): + keyword, quote, fname = t + result = SCons.Node.FS.find_file(fname, self.searchpath[quote]) + if not result: + self.missing.append((fname, self.current_file)) + return result + def read_file(self, file): + try: + fp = open(str(file.rfile())) + except EnvironmentError, e: + self.missing.append((file, self.current_file)) + return '' + else: + return fp.read() + +def dictify_CPPDEFINES(env): + cppdefines = env.get('CPPDEFINES', {}) + if cppdefines is None: + return {} + if SCons.Util.is_Sequence(cppdefines): + result = {} + for c in cppdefines: + if SCons.Util.is_Sequence(c): + result[c[0]] = c[1] + else: + result[c] = None + return result + if not SCons.Util.is_Dict(cppdefines): + return {cppdefines : None} + return cppdefines + +class SConsCPPScannerWrapper(object): + """ + The SCons wrapper around a cpp.py scanner. + + This is the actual glue between the calling conventions of generic + SCons scanners, and the (subclass of) cpp.py class that knows how + to look for #include lines with reasonably real C-preprocessor-like + evaluation of #if/#ifdef/#else/#elif lines. + """ + def __init__(self, name, variable): + self.name = name + self.path = SCons.Scanner.FindPathDirs(variable) + def __call__(self, node, env, path = ()): + cpp = SConsCPPScanner(current = node.get_dir(), + cpppath = path, + dict = dictify_CPPDEFINES(env)) + result = cpp(node) + for included, includer in cpp.missing: + fmt = "No dependency generated for file: %s (included from: %s) -- file not found" + SCons.Warnings.warn(SCons.Warnings.DependencyWarning, + fmt % (included, includer)) + return result + + def recurse_nodes(self, nodes): + return nodes + def select(self, node): + return self + +def CScanner(): + """Return a prototype Scanner instance for scanning source files + that use the C pre-processor""" + + # Here's how we would (or might) use the CPP scanner code above that + # knows how to evaluate #if/#ifdef/#else/#elif lines when searching + # for #includes. This is commented out for now until we add the + # right configurability to let users pick between the scanners. + #return SConsCPPScannerWrapper("CScanner", "CPPPATH") + + cs = SCons.Scanner.ClassicCPP("CScanner", + "$CPPSUFFIXES", + "CPPPATH", + '^[ \t]*#[ \t]*(?:include|import)[ \t]*(<|")([^>"]+)(>|")') + return cs + +# Local Variables: +# tab-width:4 +# indent-tabs-mode:nil +# End: +# vim: set expandtab tabstop=4 shiftwidth=4: |