133 lines
4.8 KiB
Python
133 lines
4.8 KiB
Python
"""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:
|