"""distutils.extension

Provides the Extension class, used to describe C/C++ extension
modules in setup scripts.

Overridden to support f2py.

"""
from __future__ import division, absolute_import, print_function

import sys
import re
from distutils.extension import Extension as old_Extension

if sys.version_info[0] >= 3:
    basestring = str


cxx_ext_re = re.compile(r'.*[.](cpp|cxx|cc)\Z', re.I).match
fortran_pyf_ext_re = re.compile(r'.*[.](f90|f95|f77|for|ftn|f|pyf)\Z', re.I).match

class Extension(old_Extension):
    def __init__ (self, name, sources,
                  include_dirs=None,
                  define_macros=None,
                  undef_macros=None,
                  library_dirs=None,
                  libraries=None,
                  runtime_library_dirs=None,
                  extra_objects=None,
                  extra_compile_args=None,
                  extra_link_args=None,
                  export_symbols=None,
                  swig_opts=None,
                  depends=None,
                  language=None,
                  f2py_options=None,
                  module_dirs=None,
                  extra_f77_compile_args=None,
                  extra_f90_compile_args=None,
                 ):
        old_Extension.__init__(self, name, [],
                               include_dirs,
                               define_macros,
                               undef_macros,
                               library_dirs,
                               libraries,
                               runtime_library_dirs,
                               extra_objects,
                               extra_compile_args,
                               extra_link_args,
                               export_symbols)
        # Avoid assert statements checking that sources contains strings:
        self.sources = sources

        # Python 2.4 distutils new features
        self.swig_opts = swig_opts or []
        # swig_opts is assumed to be a list. Here we handle the case where it
        # is specified as a string instead.
        if isinstance(self.swig_opts, basestring):
            import warnings
            msg = "swig_opts is specified as a string instead of a list"
            warnings.warn(msg, SyntaxWarning)
            self.swig_opts = self.swig_opts.split()

        # Python 2.3 distutils new features
        self.depends = depends or []
        self.language = language

        # numpy_distutils features
        self.f2py_options = f2py_options or []
        self.module_dirs = module_dirs or []
        self.extra_f77_compile_args = extra_f77_compile_args or []
        self.extra_f90_compile_args = extra_f90_compile_args or []

        return

    def has_cxx_sources(self):
        for source in self.sources:
            if cxx_ext_re(str(source)):
                return True
        return False

    def has_f2py_sources(self):
        for source in self.sources:
            if fortran_pyf_ext_re(source):
                return True
        return False

# class Extension