Adding cython v0.20.2 in third-party.

third_party/cython/src/Cython/Distutils/build_ext.py

Index: third_party/cython/src/Cython/Distutils/build_ext.py
diff --git a/third_party/cython/src/Cython/Distutils/build_ext.py b/third_party/cython/src/Cython/Distutils/build_ext.py
new file mode 100644
index 0000000000000000000000000000000000000000..a23a1502ea759f13b921ef579cb71a275a456d4f
--- /dev/null
+++ b/third_party/cython/src/Cython/Distutils/build_ext.py
@@ -0,0 +1,327 @@
+"""Cython.Distutils.build_ext
+
+Implements a version of the Distutils 'build_ext' command, for
+building Cython extension modules."""
+
+# This module should be kept compatible with Python 2.3.
+
+__revision__ = "$Id:$"
+
+import sys
+import os
+import re
+from distutils.core import Command
+from distutils.errors import DistutilsPlatformError
+from distutils.sysconfig import customize_compiler, get_python_version
+from distutils.dep_util import newer, newer_group
+from distutils import log
+from distutils.dir_util import mkpath
+from distutils.command import build_ext as _build_ext
+from distutils import sysconfig
+
+extension_name_re = _build_ext.extension_name_re
+
+show_compilers = _build_ext.show_compilers
+
+class Optimization(object):
+    def __init__(self):
+        self.flags = (
+            'OPT',
+            'CFLAGS',
+            'CPPFLAGS',
+            'EXTRA_CFLAGS',
+            'BASECFLAGS',
+            'PY_CFLAGS',
+        )
+        self.state = sysconfig.get_config_vars(*self.flags)
+        self.config_vars = sysconfig.get_config_vars()
+
+
+    def disable_optimization(self):
+        "disable optimization for the C or C++ compiler"
+        badoptions = ('-O1', '-O2', '-O3')
+
+        for flag, option in zip(self.flags, self.state):
+            if option is not None:
+                L = [opt for opt in option.split() if opt not in badoptions]
+                self.config_vars[flag] = ' '.join(L)
+
+    def restore_state(self):
+        "restore the original state"
+        for flag, option in zip(self.flags, self.state):
+            if option is not None:
+                self.config_vars[flag] = option
+
+
+optimization = Optimization()
+
+
+class build_ext(_build_ext.build_ext):
+
+    description = "build C/C++ and Cython extensions (compile/link to build directory)"
+
+    sep_by = _build_ext.build_ext.sep_by
+    user_options = _build_ext.build_ext.user_options
+    boolean_options = _build_ext.build_ext.boolean_options
+    help_options = _build_ext.build_ext.help_options
+
+    # Add the pyrex specific data.
+    user_options.extend([
+        ('cython-cplus', None,
+         "generate C++ source files"),
+        ('cython-create-listing', None,
+         "write errors to a listing file"),
+        ('cython-line-directives', None,
+         "emit source line directives"),
+        ('cython-include-dirs=', None,
+         "path to the Cython include files" + sep_by),
+        ('cython-c-in-temp', None,
+         "put generated C files in temp directory"),
+        ('cython-gen-pxi', None,
+            "generate .pxi file for public declarations"),
+        ('cython-directives=', None,
+            "compiler directive overrides"),
+        ('cython-gdb', None,
+         "generate debug information for cygdb"),
+        ('cython-compile-time-env', None,
+            "cython compile time environment"),
+            
+        # For backwards compatibility.
+        ('pyrex-cplus', None,
+         "generate C++ source files"),
+        ('pyrex-create-listing', None,
+         "write errors to a listing file"),
+        ('pyrex-line-directives', None,
+         "emit source line directives"),
+        ('pyrex-include-dirs=', None,
+         "path to the Cython include files" + sep_by),
+        ('pyrex-c-in-temp', None,
+         "put generated C files in temp directory"),
+        ('pyrex-gen-pxi', None,
+            "generate .pxi file for public declarations"),
+        ('pyrex-directives=', None,
+            "compiler directive overrides"),
+        ('pyrex-gdb', None,
+         "generate debug information for cygdb"),
+        ])
+
+    boolean_options.extend([
+        'cython-cplus', 'cython-create-listing', 'cython-line-directives',
+        'cython-c-in-temp', 'cython-gdb',
+        
+        # For backwards compatibility.
+        'pyrex-cplus', 'pyrex-create-listing', 'pyrex-line-directives',
+        'pyrex-c-in-temp', 'pyrex-gdb',
+    ])
+
+    def initialize_options(self):
+        _build_ext.build_ext.initialize_options(self)
+        self.cython_cplus = 0
+        self.cython_create_listing = 0
+        self.cython_line_directives = 0
+        self.cython_include_dirs = None
+        self.cython_directives = None
+        self.cython_c_in_temp = 0
+        self.cython_gen_pxi = 0
+        self.cython_gdb = False
+        self.no_c_in_traceback = 0
+        self.cython_compile_time_env = None
+    
+    def __getattr__(self, name):
+        if name[:6] == 'pyrex_':
+            return getattr(self, 'cython_' + name[6:])
+        else:
+            return _build_ext.build_ext.__getattr__(self, name)
+
+    def __setattr__(self, name, value):
+        if name[:6] == 'pyrex_':
+            return setattr(self, 'cython_' + name[6:], value)
+        else:
+            # _build_ext.build_ext.__setattr__(self, name, value)
+            self.__dict__[name] = value
+
+    def finalize_options (self):
+        _build_ext.build_ext.finalize_options(self)
+        if self.cython_include_dirs is None:
+            self.cython_include_dirs = []
+        elif isinstance(self.cython_include_dirs, basestring):
+            self.cython_include_dirs = \
+                self.cython_include_dirs.split(os.pathsep)
+        if self.cython_directives is None:
+            self.cython_directives = {}
+    # finalize_options ()
+
+    def run(self):
+        # We have one shot at this before build_ext initializes the compiler.
+        # If --pyrex-gdb is in effect as a command line option or as option
+        # of any Extension module, disable optimization for the C or C++
+        # compiler.
+        if self.cython_gdb or [1 for ext in self.extensions
+                                     if getattr(ext, 'cython_gdb', False)]:
+            optimization.disable_optimization()
+
+        _build_ext.build_ext.run(self)
+
+    def build_extensions(self):
+        # First, sanity-check the 'extensions' list
+        self.check_extensions_list(self.extensions)
+
+        for ext in self.extensions:
+            ext.sources = self.cython_sources(ext.sources, ext)
+            self.build_extension(ext)
+
+    def cython_sources(self, sources, extension):
+        """
+        Walk the list of source files in 'sources', looking for Cython
+        source files (.pyx and .py).  Run Cython on all that are
+        found, and return a modified 'sources' list with Cython source
+        files replaced by the generated C (or C++) files.
+        """
+        try:
+            from Cython.Compiler.Main \
+                import CompilationOptions, \
+                       default_options as cython_default_options, \
+                       compile as cython_compile
+            from Cython.Compiler.Errors import PyrexError
+        except ImportError:
+            e = sys.exc_info()[1]
+            print("failed to import Cython: %s" % e)
+            raise DistutilsPlatformError("Cython does not appear to be installed")
+
+        new_sources = []
+        cython_sources = []
+        cython_targets = {}
+
+        # Setup create_list and cplus from the extension options if
+        # Cython.Distutils.extension.Extension is used, otherwise just
+        # use what was parsed from the command-line or the configuration file.
+        # cplus will also be set to true is extension.language is equal to
+        # 'C++' or 'c++'.
+        #try:
+        #    create_listing = self.cython_create_listing or \
+        #                        extension.cython_create_listing
+        #    cplus = self.cython_cplus or \
+        #                extension.cython_cplus or \
+        #                (extension.language != None and \
+        #                    extension.language.lower() == 'c++')
+        #except AttributeError:
+        #    create_listing = self.cython_create_listing
+        #    cplus = self.cython_cplus or \
+        #                (extension.language != None and \
+        #                    extension.language.lower() == 'c++')
+
+        create_listing = self.cython_create_listing or \
+            getattr(extension, 'cython_create_listing', 0)
+        line_directives = self.cython_line_directives or \
+            getattr(extension, 'cython_line_directives', 0)
+        no_c_in_traceback = self.no_c_in_traceback or \
+            getattr(extension, 'no_c_in_traceback', 0)
+        cplus = self.cython_cplus or getattr(extension, 'cython_cplus', 0) or \
+                (extension.language and extension.language.lower() == 'c++')
+        cython_gen_pxi = self.cython_gen_pxi or getattr(extension, 'cython_gen_pxi', 0)
+        cython_gdb = self.cython_gdb or getattr(extension, 'cython_gdb', False)
+        cython_compile_time_env = self.cython_compile_time_env or \
+            getattr(extension, 'cython_compile_time_env', None)
+
+        # Set up the include_path for the Cython compiler:
+        #    1.    Start with the command line option.
+        #    2.    Add in any (unique) paths from the extension
+        #        cython_include_dirs (if Cython.Distutils.extension is used).
+        #    3.    Add in any (unique) paths from the extension include_dirs
+        includes = self.cython_include_dirs
+        try:
+            for i in extension.cython_include_dirs:
+                if not i in includes:
+                    includes.append(i)
+        except AttributeError:
+            pass
+        for i in extension.include_dirs:
+            if not i in includes:
+                includes.append(i)
+
+        # Set up Cython compiler directives:
+        #    1. Start with the command line option.
+        #    2. Add in any (unique) entries from the extension
+        #         cython_directives (if Cython.Distutils.extension is used).
+        directives = self.cython_directives
+        if hasattr(extension, "cython_directives"):
+            directives.update(extension.cython_directives)
+
+        # Set the target_ext to '.c'.  Cython will change this to '.cpp' if
+        # needed.
+        if cplus:
+            target_ext = '.cpp'
+        else:
+            target_ext = '.c'
+
+        # Decide whether to drop the generated C files into the temp dir
+        # or the source tree.
+
+        if not self.inplace and (self.cython_c_in_temp
+                or getattr(extension, 'cython_c_in_temp', 0)):
+            target_dir = os.path.join(self.build_temp, "pyrex")
+            for package_name in extension.name.split('.')[:-1]:
+                target_dir = os.path.join(target_dir, package_name)
+        else:
+            target_dir = None
+
+        newest_dependency = None
+        for source in sources:
+            (base, ext) = os.path.splitext(os.path.basename(source))
+            if ext == ".py":
+                # FIXME: we might want to special case this some more
+                ext = '.pyx'
+            if ext == ".pyx":              # Cython source file
+                output_dir = target_dir or os.path.dirname(source)
+                new_sources.append(os.path.join(output_dir, base + target_ext))
+                cython_sources.append(source)
+                cython_targets[source] = new_sources[-1]
+            elif ext == '.pxi' or ext == '.pxd':
+                if newest_dependency is None \
+                        or newer(source, newest_dependency):
+                    newest_dependency = source
+            else:
+                new_sources.append(source)
+
+        if not cython_sources:
+            return new_sources
+
+        module_name = extension.name
+
+        for source in cython_sources:
+            target = cython_targets[source]
+            depends = [source] + list(extension.depends or ())
+            if(source[-4:].lower()==".pyx" and os.path.isfile(source[:-3]+"pxd")):
+                depends += [source[:-3]+"pxd"]
+            rebuild = self.force or newer_group(depends, target, 'newer')
+            if not rebuild and newest_dependency is not None:
+                rebuild = newer(newest_dependency, target)
+            if rebuild:
+                log.info("cythoning %s to %s", source, target)
+                self.mkpath(os.path.dirname(target))
+                if self.inplace:
+                    output_dir = os.curdir
+                else:
+                    output_dir = self.build_lib
+                options = CompilationOptions(cython_default_options,
+                    use_listing_file = create_listing,
+                    include_path = includes,
+                    compiler_directives = directives,
+                    output_file = target,
+                    cplus = cplus,
+                    emit_linenums = line_directives,
+                    c_line_in_traceback = not no_c_in_traceback,
+                    generate_pxi = cython_gen_pxi,
+                    output_dir = output_dir,
+                    gdb_debug = cython_gdb,
+                    compile_time_env = cython_compile_time_env)
+                result = cython_compile(source, options=options,
+                                        full_module_name=module_name)
+            else:
+                log.info("skipping '%s' Cython extension (up-to-date)", target)
+
+        return new_sources
+
+    # cython_sources ()
+
+# class build_ext