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# Copyright 2011, 2012 David Malcolm <dmalcolm@redhat.com>
# Copyright 2011, 2012 Red Hat, Inc.
#
# This is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see
# <http://www.gnu.org/licenses/>.
from subprocess import Popen, PIPE
import re
# For the purpose of the GCC plugin, it's OK to assume that we're compiling
# with GCC itself, and thus we can use GCC extensions
with_gcc_extensions = True
def camel_case(txt):
return ''.join([word.title()
for word in txt.split('_')])
def nullable_ptr(ptr):
if ptr:
return ptr
else:
return 'NULL'
def simple_unaryfunc(identifier, typename, c_expression):
"""Define a simple unaryfunc, using a specifc PyObject subclass"""
self.add_defn("static PyObject *\n" +
"%s(%s *self)\n" % (identifier, typename) +
"{\n" +
" return %s;\n" % c_expression +
"}\n\n")
return identifier
class NamedEntity:
"""A thing within C code that has an identifier"""
def __init__(self, identifier):
self.identifier = identifier
def c_ptr_field(self, name, cast=None):
if hasattr(self, name):
val = getattr(self, name)
else:
val = None
if cast:
caststr = '(%s)' % cast
else:
caststr = ''
if with_gcc_extensions:
# Designate the initializer fields:
return ' .%s = %s%s,\n' % (name, caststr, nullable_ptr(val))
else:
return ' %s%s, /* %s */\n' % (caststr, nullable_ptr(val), name)
def unaryfunc_field(self, name):
return self.c_ptr_field(name, 'unaryfunc')
def c_src_field(self, name):
assert hasattr(self, name)
val = getattr(self, name)
if with_gcc_extensions:
# Designate the initializer fields:
return ' .%s = %s,\n' % (name, val)
else:
return ' %s, /* %s */\n' % (val, name)
def c_src_field_value(self, name, val, cast=None):
if cast:
caststr = '(%s)' % cast
else:
caststr = ''
if with_gcc_extensions:
# Designate the initializer fields:
return ' .%s = %s%s,\n' % (name, caststr, val)
else:
return ' %s%s, /* %s */\n' % (caststr, val, name)
class PyGetSetDef:
def __init__(self, name, get, set, doc, closure=None):
self.name = name
self.get = get
self.set = set
self.doc = doc
self.closure = closure
def c_defn(self):
result = ' {(char*)"%s",\n' % self.name
result += ' (getter)%s,\n' % nullable_ptr(self.get)
result += ' (setter)%s,\n' % nullable_ptr(self.set)
result += ' (char*)"%s",\n' % nullable_ptr(self.doc)
result += ' %s},\n' % nullable_ptr(self.closure)
return result
class PyGetSetDefTable(NamedEntity):
def __init__(self, identifier, gsdefs, identifier_prefix=None, typename=None):
NamedEntity.__init__(self, identifier)
self.gsdefs = gsdefs
self.identifier_prefix = identifier_prefix
self.typename = typename
def c_defn(self):
result = 'static PyGetSetDef %s[] = {\n' % self.identifier
for gsdef in self.gsdefs:
result += gsdef.c_defn()
result += ' {NULL} /* Sentinel */\n'
result += '};\n'
return result
def add_gsdef(self, name, getter, setter, doc, closure=None):
self.gsdefs.append(PyGetSetDef(name, getter, setter, doc, closure=None))
def add_simple_getter(self, cu, name, c_expression, doc):
assert self.identifier_prefix
assert self.typename
identifier = self.identifier_prefix + '_get_' + name
cu.add_simple_getter(identifier, self.typename, c_expression)
self.add_gsdef(name, identifier, None, doc)
METH_VARARGS = 'METH_VARARGS'
class PyMethodDef:
def __init__(self, name, fn_name, args, docstring):
self.name = name
self.fn_name = fn_name
#assert args in ('METH_VARARGS', ) # FIXME
self.args = args
self.docstring = docstring
def c_defn(self):
return (' {(char*)"%(name)s", %(fn_name)s, %(args)s,\n'
' (char*)"%(docstring)s"},\n' % self.__dict__)
class PyMethodTable(NamedEntity):
def __init__(self, identifier, methods):
NamedEntity.__init__(self, identifier)
self.methods = methods
def c_defn(self):
result = 'static PyMethodDef %s[] = {\n' % self.identifier
for method in self.methods:
result += method.c_defn()
result += ' {NULL, NULL, 0, NULL} /* Sentinel */\n'
result += '};\n'
return result
def add_method(self, name, fn_name, args, docstring):
self.methods.append(PyMethodDef(name, fn_name, args, docstring))
# See http://docs.python.org/c-api/typeobj.html#number-structs
class PyNumberMethods(NamedEntity):
def __init__(self, identifier):
NamedEntity.__init__(self, identifier)
def c_defn(self):
result = 'static PyNumberMethods %s = {\n' % self.identifier
result += self.c_ptr_field('nb_add')
result += self.c_ptr_field('nb_subtract')
result += self.c_ptr_field('nb_multiply')
result += '#if PY_MAJOR_VERSION < 3\n'
result += self.c_ptr_field('nb_divide')
result += '#endif\n'
result += self.c_ptr_field('nb_remainder')
result += self.c_ptr_field('nb_divmod')
result += self.c_ptr_field('nb_power')
result += self.unaryfunc_field('nb_negative')
result += self.unaryfunc_field('nb_positive')
result += self.unaryfunc_field('nb_absolute')
result += '#if PY_MAJOR_VERSION >= 3\n'
result += self.c_ptr_field('nb_bool')
result += '#else\n'
result += self.c_ptr_field('nb_nonzero')
result += '#endif\n'
result += self.unaryfunc_field('nb_invert')
result += self.c_ptr_field('nb_lshift')
result += self.c_ptr_field('nb_rshift')
result += self.c_ptr_field('nb_and')
result += self.c_ptr_field('nb_xor')
result += self.c_ptr_field('nb_or')
result += '#if PY_MAJOR_VERSION < 3\n'
result += self.c_ptr_field('nb_coerce')
result += '#endif\n'
result += self.unaryfunc_field('nb_int')
result += '#if PY_MAJOR_VERSION >= 3\n'
result += self.c_ptr_field('nb_reserved')
result += '#else\n'
result += self.unaryfunc_field('nb_long')
result += '#endif\n'
result += self.unaryfunc_field('nb_float')
result += '#if PY_MAJOR_VERSION < 3\n'
result += self.unaryfunc_field('nb_oct')
result += self.unaryfunc_field('nb_hex')
result += '#endif\n'
result += self.c_ptr_field('nb_inplace_add')
result += self.c_ptr_field('nb_inplace_subtract')
result += self.c_ptr_field('nb_inplace_multiply')
result += '#if PY_MAJOR_VERSION < 3\n'
result += self.c_ptr_field('nb_inplace_divide')
result += '#endif\n'
result += self.c_ptr_field('nb_inplace_remainder')
result += self.c_ptr_field('nb_inplace_power')
result += self.c_ptr_field('nb_inplace_lshift')
result += self.c_ptr_field('nb_inplace_rshift')
result += self.c_ptr_field('nb_inplace_and')
result += self.c_ptr_field('nb_inplace_xor')
result += self.c_ptr_field('nb_inplace_or')
result += self.c_ptr_field('nb_floor_divide')
result += self.c_ptr_field('nb_true_divide')
result += self.c_ptr_field('nb_inplace_floor_divide')
result += self.c_ptr_field('nb_inplace_true_divide')
result += self.unaryfunc_field('nb_index')
result += '};\n'
return result
def add_method(self, name, fn_name, args, docstring):
self.methods.append(PyMethodDef(name, fn_name, args, docstring))
class PyTypeObject(NamedEntity):
def __init__(self, identifier, localname, tp_name, struct_name, **kwargs):
NamedEntity.__init__(self, identifier)
self.localname = localname
self.tp_name = tp_name
self.struct_name = struct_name
self.__dict__.update(kwargs)
if not hasattr(self, 'tp_new'):
self.tp_new = 'PyType_GenericNew'
if not hasattr(self, 'tp_flags'):
self.tp_flags = 'Py_TPFLAGS_DEFAULT'
def c_defn(self):
result = '\n'
result += 'PyTypeObject %(identifier)s = {\n' % self.__dict__
result += self.c_initializer()
result += '};\n' % self.__dict__
result +='\n'
return result
def c_initializer(self):
if hasattr(self, 'ob_type'):
ob_type_str = getattr(self, 'ob_type')
else:
ob_type_str = 'NULL'
result = ' PyVarObject_HEAD_INIT(%s, 0)\n' % ob_type_str
result += ' "%(tp_name)s", /*tp_name*/\n' % self.__dict__
result += ' sizeof(%(struct_name)s), /*tp_basicsize*/\n' % self.__dict__
result += ' 0, /*tp_itemsize*/\n'
result += self.c_ptr_field('tp_dealloc')
result += self.c_ptr_field('tp_print')
result += self.c_ptr_field('tp_getattr')
result += self.c_ptr_field('tp_setattr')
result += '#if PY_MAJOR_VERSION < 3\n' % self.__dict__
result += ' 0, /*tp_compare*/\n' % self.__dict__
result += '#else\n' % self.__dict__
result += ' 0, /*reserved*/\n' % self.__dict__
result += '#endif\n' % self.__dict__
result += self.c_ptr_field('tp_repr')
result += self.c_ptr_field('tp_as_number')
result += self.c_ptr_field('tp_as_sequence')
result += self.c_ptr_field('tp_as_mapping')
result += self.c_ptr_field('tp_hash')
result += self.c_ptr_field('tp_call')
result += self.c_ptr_field('tp_str')
result += self.c_ptr_field('tp_getattro')
result += self.c_ptr_field('tp_setattro')
result += self.c_ptr_field('tp_as_buffer')
result += self.c_src_field('tp_flags')
result += ' 0, /*tp_doc*/\n'
result += self.c_ptr_field('tp_traverse')
result += self.c_ptr_field('tp_clear')
result += self.c_ptr_field('tp_richcompare')
result += ' 0, /* tp_weaklistoffset */\n'
result += self.c_ptr_field('tp_iter')
result += self.c_ptr_field('tp_iternext')
result += self.c_ptr_field('tp_methods')
result += self.c_ptr_field('tp_members')
result += self.c_ptr_field('tp_getset')
result += self.c_ptr_field('tp_base', 'PyTypeObject*')
result += self.c_ptr_field('tp_dict')
result += self.c_ptr_field('tp_descr_get')
result += self.c_ptr_field('tp_descr_set')
result += ' 0, /* tp_dictoffset */\n'
result += self.c_ptr_field('tp_init', 'initproc')
result += self.c_ptr_field('tp_alloc')
result += self.c_ptr_field('tp_new')
result += self.c_ptr_field('tp_free')
result += self.c_ptr_field('tp_is_gc')
result += self.c_ptr_field('tp_bases')
result += self.c_ptr_field('tp_mro')
result += self.c_ptr_field('tp_cache')
result += self.c_ptr_field('tp_subclasses')
result += self.c_ptr_field('tp_weaklist')
result += self.c_ptr_field('tp_del')
result += '#if PY_VERSION_HEX >= 0x02060000\n' % self.__dict__
result += ' 0, /*tp_version_tag*/\n' % self.__dict__
result += '#endif\n' % self.__dict__
result += '\n'
return result
def c_invoke_type_ready(self):
return (' if (PyType_Ready((PyTypeObject*)&%(identifier)s) < 0)\n'
' goto error;\n'
'\n') % self.__dict__
def c_invoke_add_to_module(self):
return (' Py_INCREF(&%(identifier)s);\n'
' PyModule_AddObject(m, "%(localname)s", (PyObject *)&%(identifier)s);\n'
'\n') % self.__dict__
class PyModule:
def __init__(self, modname, modmethods, moddoc):
self.modname = modname
self.moddoc = moddoc
assert (modmethods is None) or isinstance(modmethods, PyMethodTable)
self.modmethods = modmethods
if self.modmethods:
self.modmethods_as_ptr = self.modmethods.identifier
else:
self.modmethods_as_ptr = 'NULL'
def c_initfn_decl(self):
return ("""
#if PY_MAJOR_VERSION < 3
PyMODINIT_FUNC init%(modname)s(void);
#else
PyMODINIT_FUNC PyInit_%(modname)s(void);
#endif
""" % self.__dict__)
def c_initfn_def_begin(self):
return ("""
#if PY_MAJOR_VERSION < 3
PyMODINIT_FUNC init%(modname)s(void)
#else
PyMODINIT_FUNC PyInit_%(modname)s(void)
#endif
{
PyObject *m = NULL;
""" % self.__dict__)
def c_initfn_def_end(self):
return ("""
#if PY_MAJOR_VERSION < 3
return;
#else
return m;
#endif
error:
#if PY_MAJOR_VERSION < 3
return;
#else
Py_XDECREF(m);
return NULL;
#endif
}
""")
def c_py3k_moduledef(self):
return ("""
#if PY_MAJOR_VERSION >= 3
static PyModuleDef %(modname)smodule = {
PyModuleDef_HEAD_INIT,
"%(modname)s", /* m_name */
"%(moddoc)s", /* m_doc */
-1, /* m_size */
%(modmethods_as_ptr)s, /* m_methods */
NULL, NULL, NULL, NULL
};
#endif
""" % self.__dict__)
def c_invoke_ctor(self):
return ("""
#if PY_MAJOR_VERSION < 3
m = Py_InitModule3("%(modname)s", %(modmethods_as_ptr)s,
"%(moddoc)s");
#else
m = PyModule_Create(&%(modname)smodule);
#endif
if (!m) {
goto error;
}
""" % self.__dict__)
class CompilationUnit:
"""
A single C file
"""
def __init__(self):
self._includes = '#include <Python.h>\n'
self._prototypes = ''
self._definitions = ''
def add_include(self, path):
self._includes += '#include "%s"\n' % path
def add_decl(self, text):
self._prototypes += text
def add_defn(self, text):
self._definitions += text
def as_str(self):
return ('/* Autogenerated by cpybuilder */\n' +
self._includes +
self.make_header('Prototypes') +
self._prototypes +
self.make_header('Definitions') +
self._definitions)
def make_header(self, text):
return '\n/**** %s ****/\n\n' % text
def add_simple_getter(self, identifier, typename, c_expression):
"""Define a simple getter, suitable for use by a PyGetSetDef"""
self.add_defn("static PyObject *\n" +
"%s(%s *self, void *closure)\n" % (identifier, typename) +
"{\n" +
" return %s;\n" % c_expression +
"}\n\n")
return identifier
def add_simple_setter(self, identifier, typename, attrname, c_typecheck_fn, c_assignment):
"""Define a simple setter, suitable for use by a PyGetSetDef"""
self.add_defn("static int\n" +
"%s(%s *self, PyObject *value, void *closure)\n" % (identifier, typename) +
"{\n" +
" if (! %s(value)) {\n" % c_typecheck_fn +
" PyErr_SetString(PyExc_TypeError,\n" +
' "%s must be an int");\n' % attrname +
' return -1;\n'
' }\n' +
' %s;\n' % c_assignment +
" return 0;\n"
"}\n\n")
return identifier
def add_simple_int_setter(self, identifier, typename, attrname, c_assignment):
"""
Define a simple setter for an int-valued attribute, suitable for use
by a PyGetSetDef
"""
return self.add_simple_setter(identifier, typename, attrname,
'PyGccInt_Check',
c_assignment)
class SimpleModule:
"""
A C extension module built from a single C file
"""
def __init__(self):
self.cu = CompilationUnit()
self._modinit_preinit = ''
self._modinit_postinit = ''
def add_type_object(self, name, localname,
tp_name, struct_name, **kwargs):
pytype = PyTypeObject(name, localname, tp_name, struct_name, **kwargs)
self.cu.add_defn(pytype.c_defn())
self._modinit_preinit += pytype.c_invoke_type_ready()
self._modinit_postinit += pytype.c_invoke_add_to_module()
def add_module_init(self, modname, modmethods, moddoc):
pymod = PyModule(modname, modmethods, moddoc)
self.cu.add_decl(pymod.c_initfn_decl())
self.cu.add_defn(pymod.c_py3k_moduledef())
self.cu.add_defn(pymod.c_initfn_def_begin())
self.cu.add_defn(self._modinit_preinit)
self.cu.add_defn(pymod.c_invoke_ctor())
self.cu.add_defn(self._modinit_postinit)
self.cu.add_defn(pymod.c_initfn_def_end())
class SimpleBuild:
def __init__(self, sm, builddir='.'):
self.sm
#def generate_c(self):
# with open(sm.name
class CommandError(RuntimeError):
def __init__(self, out, err, p):
assert isinstance(out, str)
assert isinstance(err, str)
assert isinstance(p, Popen)
self.out = out
self.err = err
self.p = p
def __str__(self):
result = '\n'
result += 'returncode: %r\n' % self.p.returncode
result += ' %s\n' % self._describe_activity()
result += 'Stdout:\n'
result += self._indent(self.out)
result += '\nStderr:\n'
result += self._indent(self.err, 4)
result += self._extra_info()
return result
def _indent(self, txt, size=2):
return '\n'.join([' '*size + line for line in txt.splitlines()])
def _extra_info(self):
return ''
class PyRuntimeError(CommandError):
def __init__(self, runtime, cmd, out, err, p):
CommandError.__init__(self, out, err, p)
self.runtime = runtime
self.cmd = cmd
def _describe_activity(self):
return 'running: %s -c %r' % (self.runtime.executable , self.cmd)
from collections import namedtuple
class PyVersionInfo(namedtuple('PyVersionInfo', 'major minor micro releaselevel serial')):
@classmethod
def from_text(cls, txt):
# e.g.:
# sys.version_info(major=2, minor=7, micro=1, releaselevel='final', serial=0)
m = re.match('sys\.version_info\(major=([0-9]+), minor=([0-9]+), micro=([0-9]+), releaselevel=\'(.*)\', serial=([0-9]+)\)', txt)
return PyVersionInfo(major=int(m.group(1)),
minor=int(m.group(2)),
micro=int(m.group(3)),
releaselevel=m.group(4),
serial=int(m.group(5)))
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