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# cython: language_level = 2
#
# Code output module
#
import cython
cython.declare(os=object, re=object, operator=object,
Naming=object, Options=object, StringEncoding=object,
Utils=object, SourceDescriptor=object, StringIOTree=object,
DebugFlags=object, basestring=object)
import os
import re
import sys
from string import Template
import operator
import textwrap
import Naming
import Options
import StringEncoding
from Cython import Utils
from Scanning import SourceDescriptor
from Cython.StringIOTree import StringIOTree
import DebugFlags
try:
from __builtin__ import basestring
except ImportError:
from builtins import str as basestring
KEYWORDS_MUST_BE_BYTES = sys.version_info < (2,7)
non_portable_builtins_map = {
# builtins that have different names in different Python versions
'bytes' : ('PY_MAJOR_VERSION < 3', 'str'),
'unicode' : ('PY_MAJOR_VERSION >= 3', 'str'),
'xrange' : ('PY_MAJOR_VERSION >= 3', 'range'),
'BaseException' : ('PY_VERSION_HEX < 0x02050000', 'Exception'),
}
basicsize_builtins_map = {
# builtins whose type has a different tp_basicsize than sizeof(...)
'PyTypeObject' : 'PyHeapTypeObject',
}
uncachable_builtins = [
# builtin names that cannot be cached because they may or may not
# be available at import time
'WindowsError',
]
modifier_output_mapper = {
'inline': 'CYTHON_INLINE'
}.get
def get_utility_dir():
# make this a function and not global variables:
# http://trac.cython.org/cython_trac/ticket/475
Cython_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
return os.path.join(Cython_dir, "Utility")
class UtilityCodeBase(object):
"""
Support for loading utility code from a file.
Code sections in the file can be specified as follows:
##### MyUtility.proto #####
##### MyUtility #####
#@requires: MyOtherUtility
#@substitute: naming
for prototypes and implementation respectively. For non-python or
-cython files backslashes should be used instead. 5 to 30 comment
characters may be used on either side.
If the @cname decorator is not used and this is a CythonUtilityCode,
one should pass in the 'name' keyword argument to be used for name
mangling of such entries.
"""
is_cython_utility = False
requires = None
_utility_cache = {}
@classmethod
def _add_utility(cls, utility, type, lines, begin_lineno, tags=None):
if utility is None:
return
code = '\n'.join(lines)
if tags and 'substitute' in tags and tags['substitute'] == set(['naming']):
del tags['substitute']
try:
code = Template(code).substitute(vars(Naming))
except (KeyError, ValueError), e:
raise RuntimeError("Error parsing templated utility code of type '%s' at line %d: %s" % (
type, begin_lineno, e))
# remember correct line numbers at least until after templating
code = '\n' * begin_lineno + code
if type == 'proto':
utility[0] = code
elif type == 'impl':
utility[1] = code
else:
all_tags = utility[2]
if KEYWORDS_MUST_BE_BYTES:
type = type.encode('ASCII')
all_tags[type] = code
if tags:
all_tags = utility[2]
for name, values in tags.items():
if KEYWORDS_MUST_BE_BYTES:
name = name.encode('ASCII')
all_tags.setdefault(name, set()).update(values)
@classmethod
def load_utilities_from_file(cls, path):
utilities = cls._utility_cache.get(path)
if utilities:
return utilities
filename = os.path.join(get_utility_dir(), path)
_, ext = os.path.splitext(path)
if ext in ('.pyx', '.py', '.pxd', '.pxi'):
comment = '#'
replace_comments = re.compile(r'^\s*#.*').sub
else:
comment = '/'
replace_comments = re.compile(r'^\s*//.*|^\s*/\*[^*]*\*/').sub
match_special = re.compile(
(r'^%(C)s{5,30}\s*(?P<name>(?:\w|\.)+)\s*%(C)s{5,30}|'
r'^%(C)s+@(?P<tag>\w+)\s*:\s*(?P<value>(?:\w|[.:])+)' # add more tag names here at need
) % {'C':comment}).match
match_type = re.compile('(.+)[.](proto|impl|init|cleanup)$').match
f = Utils.open_source_file(filename, encoding='UTF-8')
try:
all_lines = f.readlines()
finally:
f.close()
utilities = {}
lines = []
tags = {}
utility = type = None
begin_lineno = 0
for lineno, line in enumerate(all_lines):
m = match_special(line)
if m:
if m.group('name'):
cls._add_utility(utility, type, lines, begin_lineno, tags)
begin_lineno = lineno + 1
del lines[:]
tags.clear()
name = m.group('name')
mtype = match_type(name)
if mtype:
name, type = mtype.groups()
else:
type = 'impl'
utility = utilities.setdefault(name, [None, None, {}])
else:
tags.setdefault(m.group('tag'), set()).add(m.group('value'))
lines.append('') # keep line number correct
else:
lines.append(replace_comments('', line).rstrip())
if utility is None:
raise ValueError("Empty utility code file")
# Don't forget to add the last utility code
cls._add_utility(utility, type, lines, begin_lineno, tags)
cls._utility_cache[path] = utilities
return utilities
@classmethod
def load(cls, util_code_name, from_file=None, **kwargs):
"""
Load utility code from a file specified by from_file (relative to
Cython/Utility) and name util_code_name. If from_file is not given,
load it from the file util_code_name.*. There should be only one
file matched by this pattern.
"""
if '::' in util_code_name:
from_file, util_code_name = util_code_name.rsplit('::', 1)
if not from_file:
utility_dir = get_utility_dir()
prefix = util_code_name + '.'
try:
listing = os.listdir(utility_dir)
except OSError:
# XXX the code below assumes as 'zipimport.zipimporter' instance
# XXX should be easy to generalize, but too lazy right now to write it
import zipfile
global __loader__
loader = __loader__
archive = loader.archive
fileobj = zipfile.ZipFile(archive)
listing = [ os.path.basename(name)
for name in fileobj.namelist()
if os.path.join(archive, name).startswith(utility_dir)]
fileobj.close()
files = [ os.path.join(utility_dir, filename)
for filename in listing
if filename.startswith(prefix) ]
if not files:
raise ValueError("No match found for utility code " + util_code_name)
if len(files) > 1:
raise ValueError("More than one filename match found for utility code " + util_code_name)
from_file = files[0]
utilities = cls.load_utilities_from_file(from_file)
proto, impl, tags = utilities[util_code_name]
if tags:
orig_kwargs = kwargs.copy()
for name, values in tags.items():
if name in kwargs:
continue
# only pass lists when we have to: most argument expect one value or None
if name == 'requires':
values = [ cls.load(dep, from_file, **orig_kwargs) for dep in values ]
elif not values:
values = None
elif len(values) == 1:
values = values[0]
kwargs[name] = values
if proto is not None:
kwargs['proto'] = proto
if impl is not None:
kwargs['impl'] = impl
if 'name' not in kwargs:
kwargs['name'] = util_code_name
if 'file' not in kwargs and from_file:
kwargs['file'] = from_file
return cls(**kwargs)
@classmethod
def load_cached(cls, utility_code_name, from_file=None, _cache={}):
"""
Calls .load(), but using a per-type cache based on utility name and file name.
"""
key = (cls, from_file, utility_code_name)
try:
return _cache[key]
except KeyError:
pass
code = _cache[key] = cls.load(utility_code_name, from_file)
return code
@classmethod
def load_as_string(cls, util_code_name, from_file=None, **kwargs):
"""
Load a utility code as a string. Returns (proto, implementation)
"""
util = cls.load(util_code_name, from_file, **kwargs)
proto, impl = util.proto, util.impl
return util.format_code(proto), util.format_code(impl)
def format_code(self, code_string, replace_empty_lines=re.compile(r'\n\n+').sub):
"""
Format a code section for output.
"""
if code_string:
code_string = replace_empty_lines('\n', code_string.strip()) + '\n\n'
return code_string
def __str__(self):
return "<%s(%s)" % (type(self).__name__, self.name)
def get_tree(self):
pass
class UtilityCode(UtilityCodeBase):
"""
Stores utility code to add during code generation.
See GlobalState.put_utility_code.
hashes/equals by instance
proto C prototypes
impl implemenation code
init code to call on module initialization
requires utility code dependencies
proto_block the place in the resulting file where the prototype should
end up
name name of the utility code (or None)
file filename of the utility code file this utility was loaded
from (or None)
"""
def __init__(self, proto=None, impl=None, init=None, cleanup=None, requires=None,
proto_block='utility_code_proto', name=None, file=None):
# proto_block: Which code block to dump prototype in. See GlobalState.
self.proto = proto
self.impl = impl
self.init = init
self.cleanup = cleanup
self.requires = requires
self._cache = {}
self.specialize_list = []
self.proto_block = proto_block
self.name = name
self.file = file
def __hash__(self):
return hash((self.proto, self.impl))
def __eq__(self, other):
if self is other:
return True
if not isinstance(other, type(self)):
return False
self_proto = getattr(self, 'proto', None)
other_proto = getattr(other, 'proto', None)
return (self_proto, self.impl) == (other_proto, other.impl)
def none_or_sub(self, s, context):
"""
Format a string in this utility code with context. If None, do nothing.
"""
if s is None:
return None
return s % context
def specialize(self, pyrex_type=None, **data):
# Dicts aren't hashable...
if pyrex_type is not None:
data['type'] = pyrex_type.declaration_code('')
data['type_name'] = pyrex_type.specialization_name()
key = tuple(sorted(data.items()))
try:
return self._cache[key]
except KeyError:
if self.requires is None:
requires = None
else:
requires = [r.specialize(data) for r in self.requires]
s = self._cache[key] = UtilityCode(
self.none_or_sub(self.proto, data),
self.none_or_sub(self.impl, data),
self.none_or_sub(self.init, data),
self.none_or_sub(self.cleanup, data),
requires,
self.proto_block)
self.specialize_list.append(s)
return s
def put_code(self, output):
if self.requires:
for dependency in self.requires:
output.use_utility_code(dependency)
if self.proto:
output[self.proto_block].put(self.format_code(self.proto))
if self.impl:
output['utility_code_def'].put(self.format_code(self.impl))
if self.init:
writer = output['init_globals']
if isinstance(self.init, basestring):
writer.put(self.format_code(self.init))
else:
self.init(writer, output.module_pos)
if self.cleanup and Options.generate_cleanup_code:
writer = output['cleanup_globals']
if isinstance(self.cleanup, basestring):
writer.put(self.format_code(self.cleanup))
else:
self.cleanup(writer, output.module_pos)
def sub_tempita(s, context, file=None, name=None):
"Run tempita on string s with given context."
if not s:
return None
if file:
context['__name'] = "%s:%s" % (file, name)
elif name:
context['__name'] = name
from Cython.Tempita import sub
return sub(s, **context)
class TempitaUtilityCode(UtilityCode):
def __init__(self, name=None, proto=None, impl=None, file=None, context=None, **kwargs):
if context is None:
context = {}
proto = sub_tempita(proto, context, file, name)
impl = sub_tempita(impl, context, file, name)
super(TempitaUtilityCode, self).__init__(
proto, impl, name=name, file=file, **kwargs)
def none_or_sub(self, s, context):
"""
Format a string in this utility code with context. If None, do nothing.
"""
if s is None:
return None
return sub_tempita(s, context, self.file, self.name)
class LazyUtilityCode(UtilityCodeBase):
"""
Utility code that calls a callback with the root code writer when
available. Useful when you only have 'env' but not 'code'.
"""
def __init__(self, callback):
self.callback = callback
def put_code(self, globalstate):
utility = self.callback(globalstate.rootwriter)
globalstate.use_utility_code(utility)
class FunctionState(object):
# return_label string function return point label
# error_label string error catch point label
# continue_label string loop continue point label
# break_label string loop break point label
# return_from_error_cleanup_label string
# label_counter integer counter for naming labels
# in_try_finally boolean inside try of try...finally
# exc_vars (string * 3) exception variables for reraise, or None
# Not used for now, perhaps later
def __init__(self, owner, names_taken=set()):
self.names_taken = names_taken
self.owner = owner
self.error_label = None
self.label_counter = 0
self.labels_used = set()
self.return_label = self.new_label()
self.new_error_label()
self.continue_label = None
self.break_label = None
self.in_try_finally = 0
self.exc_vars = None
self.temps_allocated = [] # of (name, type, manage_ref)
self.temps_free = {} # (type, manage_ref) -> list of free vars with same type/managed status
self.temps_used_type = {} # name -> (type, manage_ref)
self.temp_counter = 0
self.closure_temps = None
# This is used to collect temporaries, useful to find out which temps
# need to be privatized in parallel sections
self.collect_temps_stack = []
# This is used for the error indicator, which needs to be local to the
# function. It used to be global, which relies on the GIL being held.
# However, exceptions may need to be propagated through 'nogil'
# sections, in which case we introduce a race condition.
self.should_declare_error_indicator = False
# labels
def new_label(self, name=None):
n = self.label_counter
self.label_counter = n + 1
label = "%s%d" % (Naming.label_prefix, n)
if name is not None:
label += '_' + name
return label
def new_error_label(self):
old_err_lbl = self.error_label
self.error_label = self.new_label('error')
return old_err_lbl
def get_loop_labels(self):
return (
self.continue_label,
self.break_label)
def set_loop_labels(self, labels):
(self.continue_label,
self.break_label) = labels
def new_loop_labels(self):
old_labels = self.get_loop_labels()
self.set_loop_labels(
(self.new_label("continue"),
self.new_label("break")))
return old_labels
def get_all_labels(self):
return (
self.continue_label,
self.break_label,
self.return_label,
self.error_label)
def set_all_labels(self, labels):
(self.continue_label,
self.break_label,
self.return_label,
self.error_label) = labels
def all_new_labels(self):
old_labels = self.get_all_labels()
new_labels = []
for old_label in old_labels:
if old_label:
new_labels.append(self.new_label())
else:
new_labels.append(old_label)
self.set_all_labels(new_labels)
return old_labels
def use_label(self, lbl):
self.labels_used.add(lbl)
def label_used(self, lbl):
return lbl in self.labels_used
# temp handling
def allocate_temp(self, type, manage_ref):
"""
Allocates a temporary (which may create a new one or get a previously
allocated and released one of the same type). Type is simply registered
and handed back, but will usually be a PyrexType.
If type.is_pyobject, manage_ref comes into play. If manage_ref is set to
True, the temp will be decref-ed on return statements and in exception
handling clauses. Otherwise the caller has to deal with any reference
counting of the variable.
If not type.is_pyobject, then manage_ref will be ignored, but it
still has to be passed. It is recommended to pass False by convention
if it is known that type will never be a Python object.
A C string referring to the variable is returned.
"""
if not type.is_pyobject and not type.is_memoryviewslice:
# Make manage_ref canonical, so that manage_ref will always mean
# a decref is needed.
manage_ref = False
freelist = self.temps_free.get((type, manage_ref))
if freelist is not None and len(freelist) > 0:
result = freelist.pop()
else:
while True:
self.temp_counter += 1
result = "%s%d" % (Naming.codewriter_temp_prefix, self.temp_counter)
if not result in self.names_taken: break
self.temps_allocated.append((result, type, manage_ref))
self.temps_used_type[result] = (type, manage_ref)
if DebugFlags.debug_temp_code_comments:
self.owner.putln("/* %s allocated */" % result)
if self.collect_temps_stack:
self.collect_temps_stack[-1].add((result, type))
return result
def release_temp(self, name):
"""
Releases a temporary so that it can be reused by other code needing
a temp of the same type.
"""
type, manage_ref = self.temps_used_type[name]
freelist = self.temps_free.get((type, manage_ref))
if freelist is None:
freelist = []
self.temps_free[(type, manage_ref)] = freelist
if name in freelist:
raise RuntimeError("Temp %s freed twice!" % name)
freelist.append(name)
if DebugFlags.debug_temp_code_comments:
self.owner.putln("/* %s released */" % name)
def temps_in_use(self):
"""Return a list of (cname,type,manage_ref) tuples of temp names and their type
that are currently in use.
"""
used = []
for name, type, manage_ref in self.temps_allocated:
freelist = self.temps_free.get((type, manage_ref))
if freelist is None or name not in freelist:
used.append((name, type, manage_ref and type.is_pyobject))
return used
def temps_holding_reference(self):
"""Return a list of (cname,type) tuples of temp names and their type
that are currently in use. This includes only temps of a
Python object type which owns its reference.
"""
return [(name, type)
for name, type, manage_ref in self.temps_in_use()
if manage_ref and type.is_pyobject]
def all_managed_temps(self):
"""Return a list of (cname, type) tuples of refcount-managed Python objects.
"""
return [(cname, type)
for cname, type, manage_ref in self.temps_allocated
if manage_ref]
def all_free_managed_temps(self):
"""Return a list of (cname, type) tuples of refcount-managed Python
objects that are not currently in use. This is used by
try-except and try-finally blocks to clean up temps in the
error case.
"""
return [(cname, type)
for (type, manage_ref), freelist in self.temps_free.items()
if manage_ref
for cname in freelist]
def start_collecting_temps(self):
"""
Useful to find out which temps were used in a code block
"""
self.collect_temps_stack.append(set())
def stop_collecting_temps(self):
return self.collect_temps_stack.pop()
def init_closure_temps(self, scope):
self.closure_temps = ClosureTempAllocator(scope)
class IntConst(object):
"""Global info about a Python integer constant held by GlobalState.
"""
# cname string
# value int
# is_long boolean
def __init__(self, cname, value, is_long):
self.cname = cname
self.value = value
self.is_long = is_long
class PyObjectConst(object):
"""Global info about a generic constant held by GlobalState.
"""
# cname string
# type PyrexType
def __init__(self, cname, type):
self.cname = cname
self.type = type
cython.declare(possible_unicode_identifier=object, possible_bytes_identifier=object,
nice_identifier=object, find_alphanums=object)
possible_unicode_identifier = re.compile(ur"(?![0-9])\w+$", re.U).match
possible_bytes_identifier = re.compile(r"(?![0-9])\w+$".encode('ASCII')).match
nice_identifier = re.compile(r'\A[a-zA-Z0-9_]+\Z').match
find_alphanums = re.compile('([a-zA-Z0-9]+)').findall
class StringConst(object):
"""Global info about a C string constant held by GlobalState.
"""
# cname string
# text EncodedString or BytesLiteral
# py_strings {(identifier, encoding) : PyStringConst}
def __init__(self, cname, text, byte_string):
self.cname = cname
self.text = text
self.escaped_value = StringEncoding.escape_byte_string(byte_string)
self.py_strings = None
self.py_versions = []
def add_py_version(self, version):
if not version:
self.py_versions = [2,3]
elif version not in self.py_versions:
self.py_versions.append(version)
def get_py_string_const(self, encoding, identifier=None,
is_str=False, py3str_cstring=None):
py_strings = self.py_strings
text = self.text
is_str = bool(identifier or is_str)
is_unicode = encoding is None and not is_str
if encoding is None:
# unicode string
encoding_key = None
else:
# bytes or str
encoding = encoding.lower()
if encoding in ('utf8', 'utf-8', 'ascii', 'usascii', 'us-ascii'):
encoding = None
encoding_key = None
else:
encoding_key = ''.join(find_alphanums(encoding))
key = (is_str, is_unicode, encoding_key, py3str_cstring)
if py_strings is not None:
try:
return py_strings[key]
except KeyError:
pass
else:
self.py_strings = {}
if identifier:
intern = True
elif identifier is None:
if isinstance(text, unicode):
intern = bool(possible_unicode_identifier(text))
else:
intern = bool(possible_bytes_identifier(text))
else:
intern = False
if intern:
prefix = Naming.interned_str_prefix
else:
prefix = Naming.py_const_prefix
if encoding_key:
encoding_prefix = '_%s' % encoding_key
else:
encoding_prefix = ''
pystring_cname = "%s%s%s_%s" % (
prefix,
(is_str and 's') or (is_unicode and 'u') or 'b',
encoding_prefix,
self.cname[len(Naming.const_prefix):])
py_string = PyStringConst(
pystring_cname, encoding, is_unicode, is_str, py3str_cstring, intern)
self.py_strings[key] = py_string
return py_string
class PyStringConst(object):
"""Global info about a Python string constant held by GlobalState.
"""
# cname string
# py3str_cstring string
# encoding string
# intern boolean
# is_unicode boolean
# is_str boolean
def __init__(self, cname, encoding, is_unicode, is_str=False,
py3str_cstring=None, intern=False):
self.cname = cname
self.py3str_cstring = py3str_cstring
self.encoding = encoding
self.is_str = is_str
self.is_unicode = is_unicode
self.intern = intern
def __lt__(self, other):
return self.cname < other.cname
class GlobalState(object):
# filename_table {string : int} for finding filename table indexes
# filename_list [string] filenames in filename table order
# input_file_contents dict contents (=list of lines) of any file that was used as input
# to create this output C code. This is
# used to annotate the comments.
#
# utility_codes set IDs of used utility code (to avoid reinsertion)
#
# declared_cnames {string:Entry} used in a transition phase to merge pxd-declared
# constants etc. into the pyx-declared ones (i.e,
# check if constants are already added).
# In time, hopefully the literals etc. will be
# supplied directly instead.
#
# const_cname_counter int global counter for constant identifiers
#
# parts {string:CCodeWriter}
# interned_strings
# consts
# interned_nums
# directives set Temporary variable used to track
# the current set of directives in the code generation
# process.
directives = {}
code_layout = [
'h_code',
'filename_table',
'utility_code_proto_before_types',
'numeric_typedefs', # Let these detailed individual parts stay!,
'complex_type_declarations', # as the proper solution is to make a full DAG...
'type_declarations', # More coarse-grained blocks would simply hide
'utility_code_proto', # the ugliness, not fix it
'module_declarations',
'typeinfo',
'before_global_var',
'global_var',
'decls',
'all_the_rest',
'pystring_table',
'cached_builtins',
'cached_constants',
'init_globals',
'init_module',
'cleanup_globals',
'cleanup_module',
'main_method',
'utility_code_def',
'end'
]
def __init__(self, writer, module_node, emit_linenums=False):
self.filename_table = {}
self.filename_list = []
self.input_file_contents = {}
self.utility_codes = set()
self.declared_cnames = {}
self.in_utility_code_generation = False
self.emit_linenums = emit_linenums
self.parts = {}
self.module_node = module_node # because some utility code generation needs it
# (generating backwards-compatible Get/ReleaseBuffer
self.const_cname_counter = 1
self.string_const_index = {}
self.int_const_index = {}
self.py_constants = []
assert writer.globalstate is None
writer.globalstate = self
self.rootwriter = writer
def initialize_main_c_code(self):
rootwriter = self.rootwriter
for part in self.code_layout:
self.parts[part] = rootwriter.insertion_point()
if not Options.cache_builtins:
del self.parts['cached_builtins']
else:
w = self.parts['cached_builtins']
w.enter_cfunc_scope()
w.putln("static int __Pyx_InitCachedBuiltins(void) {")
w = self.parts['cached_constants']
w.enter_cfunc_scope()
w.putln("")
w.putln("static int __Pyx_InitCachedConstants(void) {")
w.put_declare_refcount_context()
w.put_setup_refcount_context("__Pyx_InitCachedConstants")
w = self.parts['init_globals']
w.enter_cfunc_scope()
w.putln("")
w.putln("static int __Pyx_InitGlobals(void) {")
if not Options.generate_cleanup_code:
del self.parts['cleanup_globals']
else:
w = self.parts['cleanup_globals']
w.enter_cfunc_scope()
w.putln("")
w.putln("static void __Pyx_CleanupGlobals(void) {")
#
# utility_code_def
#
code = self.parts['utility_code_def']
if self.emit_linenums:
code.write('\n#line 1 "cython_utility"\n')
code.putln("")
code.putln("/* Runtime support code */")
def finalize_main_c_code(self):
self.close_global_decls()
#
# utility_code_def
#
code = self.parts['utility_code_def']
import PyrexTypes
code.put(PyrexTypes.type_conversion_functions)
code.putln("")
def __getitem__(self, key):
return self.parts[key]
#
# Global constants, interned objects, etc.
#
def close_global_decls(self):
# This is called when it is known that no more global declarations will
# declared.
self.generate_const_declarations()
if Options.cache_builtins:
w = self.parts['cached_builtins']
w.putln("return 0;")
if w.label_used(w.error_label):
w.put_label(w.error_label)
w.putln("return -1;")
w.putln("}")
w.exit_cfunc_scope()
w = self.parts['cached_constants']
w.put_finish_refcount_context()
w.putln("return 0;")
if w.label_used(w.error_label):
w.put_label(w.error_label)
w.put_finish_refcount_context()
w.putln("return -1;")
w.putln("}")
w.exit_cfunc_scope()
w = self.parts['init_globals']
w.putln("return 0;")
if w.label_used(w.error_label):
w.put_label(w.error_label)
w.putln("return -1;")
w.putln("}")
w.exit_cfunc_scope()
if Options.generate_cleanup_code:
w = self.parts['cleanup_globals']
w.putln("}")
w.exit_cfunc_scope()
if Options.generate_cleanup_code:
w = self.parts['cleanup_module']
w.putln("}")
w.exit_cfunc_scope()
def put_pyobject_decl(self, entry):
self['global_var'].putln("static PyObject *%s;" % entry.cname)
# constant handling at code generation time
def get_cached_constants_writer(self):
return self.parts['cached_constants']
def get_int_const(self, str_value, longness=False):
longness = bool(longness)
try:
c = self.int_const_index[(str_value, longness)]
except KeyError:
c = self.new_int_const(str_value, longness)
return c
def get_py_const(self, type, prefix='', cleanup_level=None):
# create a new Python object constant
const = self.new_py_const(type, prefix)
if cleanup_level is not None \
and cleanup_level <= Options.generate_cleanup_code:
cleanup_writer = self.parts['cleanup_globals']
cleanup_writer.putln('Py_CLEAR(%s);' % const.cname)
return const
def get_string_const(self, text, py_version=None):
# return a C string constant, creating a new one if necessary
if text.is_unicode:
byte_string = text.utf8encode()
else:
byte_string = text.byteencode()
try:
c = self.string_const_index[byte_string]
except KeyError:
c = self.new_string_const(text, byte_string)
c.add_py_version(py_version)
return c
def get_py_string_const(self, text, identifier=None,
is_str=False, unicode_value=None):
# return a Python string constant, creating a new one if necessary
py3str_cstring = None
if is_str and unicode_value is not None \
and unicode_value.utf8encode() != text.byteencode():
py3str_cstring = self.get_string_const(unicode_value, py_version=3)
c_string = self.get_string_const(text, py_version=2)
else:
c_string = self.get_string_const(text)
py_string = c_string.get_py_string_const(
text.encoding, identifier, is_str, py3str_cstring)
return py_string
def get_interned_identifier(self, text):
return self.get_py_string_const(text, identifier=True)
def new_string_const(self, text, byte_string):
cname = self.new_string_const_cname(byte_string)
c = StringConst(cname, text, byte_string)
self.string_const_index[byte_string] = c
return c
def new_int_const(self, value, longness):
cname = self.new_int_const_cname(value, longness)
c = IntConst(cname, value, longness)
self.int_const_index[(value, longness)] = c
return c
def new_py_const(self, type, prefix=''):
cname = self.new_const_cname(prefix)
c = PyObjectConst(cname, type)
self.py_constants.append(c)
return c
def new_string_const_cname(self, bytes_value, intern=None):
# Create a new globally-unique nice name for a C string constant.
try:
value = bytes_value.decode('ASCII')
except UnicodeError:
return self.new_const_cname()
if len(value) < 20 and nice_identifier(value):
return "%s_%s" % (Naming.const_prefix, value)
else:
return self.new_const_cname()
def new_int_const_cname(self, value, longness):
if longness:
value += 'L'
cname = "%s%s" % (Naming.interned_num_prefix, value)
cname = cname.replace('-', 'neg_').replace('.','_')
return cname
def new_const_cname(self, prefix=''):
n = self.const_cname_counter
self.const_cname_counter += 1
return "%s%s%d" % (Naming.const_prefix, prefix, n)
def add_cached_builtin_decl(self, entry):
if entry.is_builtin and entry.is_const:
if self.should_declare(entry.cname, entry):
self.put_pyobject_decl(entry)
w = self.parts['cached_builtins']
condition = None
if entry.name in non_portable_builtins_map:
condition, replacement = non_portable_builtins_map[entry.name]
w.putln('#if %s' % condition)
self.put_cached_builtin_init(
entry.pos, StringEncoding.EncodedString(replacement),
entry.cname)
w.putln('#else')
self.put_cached_builtin_init(
entry.pos, StringEncoding.EncodedString(entry.name),
entry.cname)
if condition:
w.putln('#endif')
def put_cached_builtin_init(self, pos, name, cname):
w = self.parts['cached_builtins']
interned_cname = self.get_interned_identifier(name).cname
from ExprNodes import get_name_interned_utility_code
self.use_utility_code(get_name_interned_utility_code)
w.putln('%s = __Pyx_GetName(%s, %s); if (!%s) %s' % (
cname,
Naming.builtins_cname,
interned_cname,
cname,
w.error_goto(pos)))
def generate_const_declarations(self):
self.generate_string_constants()
self.generate_int_constants()
self.generate_object_constant_decls()
def generate_object_constant_decls(self):
consts = [ (len(c.cname), c.cname, c)
for c in self.py_constants ]
consts.sort()
decls_writer = self.parts['decls']
for _, cname, c in consts:
decls_writer.putln(
"static %s;" % c.type.declaration_code(cname))
def generate_string_constants(self):
c_consts = [ (len(c.cname), c.cname, c)
for c in self.string_const_index.values() ]
c_consts.sort()
py_strings = []
decls_writer = self.parts['decls']
for _, cname, c in c_consts:
conditional = False
if c.py_versions and (2 not in c.py_versions or 3 not in c.py_versions):
conditional = True
decls_writer.putln("#if PY_MAJOR_VERSION %s 3" % (
(2 in c.py_versions) and '<' or '>='))
decls_writer.putln('static char %s[] = "%s";' % (
cname, StringEncoding.split_string_literal(c.escaped_value)))
if conditional:
decls_writer.putln("#endif")
if c.py_strings is not None:
for py_string in c.py_strings.values():
py_strings.append((c.cname, len(py_string.cname), py_string))
if py_strings:
import Nodes
self.use_utility_code(Nodes.init_string_tab_utility_code)
py_strings.sort()
w = self.parts['pystring_table']
w.putln("")
w.putln("static __Pyx_StringTabEntry %s[] = {" %
Naming.stringtab_cname)
for c_cname, _, py_string in py_strings:
if not py_string.is_str or not py_string.encoding or \
py_string.encoding in ('ASCII', 'USASCII', 'US-ASCII',
'UTF8', 'UTF-8'):
encoding = '0'
else:
encoding = '"%s"' % py_string.encoding.lower()
decls_writer.putln(
"static PyObject *%s;" % py_string.cname)
if py_string.py3str_cstring:
w.putln("#if PY_MAJOR_VERSION >= 3")
w.putln(
"{&%s, %s, sizeof(%s), %s, %d, %d, %d}," % (
py_string.cname,
py_string.py3str_cstring.cname,
py_string.py3str_cstring.cname,
'0', 1, 0,
py_string.intern
))
w.putln("#else")
w.putln(
"{&%s, %s, sizeof(%s), %s, %d, %d, %d}," % (
py_string.cname,
c_cname,
c_cname,
encoding,
py_string.is_unicode,
py_string.is_str,
py_string.intern
))
if py_string.py3str_cstring:
w.putln("#endif")
w.putln("{0, 0, 0, 0, 0, 0, 0}")
w.putln("};")
init_globals = self.parts['init_globals']
init_globals.putln(
"if (__Pyx_InitStrings(%s) < 0) %s;" % (
Naming.stringtab_cname,
init_globals.error_goto(self.module_pos)))
def generate_int_constants(self):
consts = [ (len(c.value), c.value, c.is_long, c)
for c in self.int_const_index.values() ]
consts.sort()
decls_writer = self.parts['decls']
for _, value, longness, c in consts:
cname = c.cname
decls_writer.putln("static PyObject *%s;" % cname)
if longness:
function = '%s = PyLong_FromString((char *)"%s", 0, 0); %s;'
elif Utils.long_literal(value):
function = '%s = PyInt_FromString((char *)"%s", 0, 0); %s;'
else:
function = "%s = PyInt_FromLong(%s); %s;"
init_globals = self.parts['init_globals']
init_globals.putln(function % (
cname,
value,
init_globals.error_goto_if_null(cname, self.module_pos)))
# The functions below are there in a transition phase only
# and will be deprecated. They are called from Nodes.BlockNode.
# The copy&paste duplication is intentional in order to be able
# to see quickly how BlockNode worked, until this is replaced.
def should_declare(self, cname, entry):
if cname in self.declared_cnames:
other = self.declared_cnames[cname]
assert str(entry.type) == str(other.type)
assert entry.init == other.init
return False
else:
self.declared_cnames[cname] = entry
return True
#
# File name state
#
def lookup_filename(self, filename):
try:
index = self.filename_table[filename]
except KeyError:
index = len(self.filename_list)
self.filename_list.append(filename)
self.filename_table[filename] = index
return index
def commented_file_contents(self, source_desc):
try:
return self.input_file_contents[source_desc]
except KeyError:
pass
source_file = source_desc.get_lines(encoding='ASCII',
error_handling='ignore')
try:
F = [u' * ' + line.rstrip().replace(
u'*/', u'*[inserted by cython to avoid comment closer]/'
).replace(
u'/*', u'/[inserted by cython to avoid comment start]*'
)
for line in source_file]
finally:
if hasattr(source_file, 'close'):
source_file.close()
if not F: F.append(u'')
self.input_file_contents[source_desc] = F
return F
#
# Utility code state
#
def use_utility_code(self, utility_code):
"""
Adds code to the C file. utility_code should
a) implement __eq__/__hash__ for the purpose of knowing whether the same
code has already been included
b) implement put_code, which takes a globalstate instance
See UtilityCode.
"""
if utility_code not in self.utility_codes:
self.utility_codes.add(utility_code)
utility_code.put_code(self)
def funccontext_property(name):
attribute_of = operator.attrgetter(name)
def get(self):
return attribute_of(self.funcstate)
def set(self, value):
setattr(self.funcstate, name, value)
return property(get, set)
class CCodeWriter(object):
"""
Utility class to output C code.
When creating an insertion point one must care about the state that is
kept:
- formatting state (level, bol) is cloned and used in insertion points
as well
- labels, temps, exc_vars: One must construct a scope in which these can
exist by calling enter_cfunc_scope/exit_cfunc_scope (these are for
sanity checking and forward compatabilty). Created insertion points
looses this scope and cannot access it.
- marker: Not copied to insertion point
- filename_table, filename_list, input_file_contents: All codewriters
coming from the same root share the same instances simultaneously.
"""
# f file output file
# buffer StringIOTree
# level int indentation level
# bol bool beginning of line?
# marker string comment to emit before next line
# funcstate FunctionState contains state local to a C function used for code
# generation (labels and temps state etc.)
# globalstate GlobalState contains state global for a C file (input file info,
# utility code, declared constants etc.)
# emit_linenums boolean whether or not to write #line pragmas
#
# c_line_in_traceback boolean append the c file and line number to the traceback for exceptions
#
# pyclass_stack list used during recursive code generation to pass information
# about the current class one is in
globalstate = None
def __init__(self, create_from=None, buffer=None, copy_formatting=False, emit_linenums=None, c_line_in_traceback=True):
if buffer is None: buffer = StringIOTree()
self.buffer = buffer
self.marker = None
self.last_marker_line = 0
self.source_desc = ""
self.pyclass_stack = []
self.funcstate = None
self.level = 0
self.call_level = 0
self.bol = 1
if create_from is not None:
# Use same global state
self.globalstate = create_from.globalstate
self.funcstate = create_from.funcstate
# Clone formatting state
if copy_formatting:
self.level = create_from.level
self.bol = create_from.bol
self.call_level = create_from.call_level
if emit_linenums is None and self.globalstate:
self.emit_linenums = self.globalstate.emit_linenums
else:
self.emit_linenums = emit_linenums
self.c_line_in_traceback = c_line_in_traceback
def create_new(self, create_from, buffer, copy_formatting):
# polymorphic constructor -- very slightly more versatile
# than using __class__
result = CCodeWriter(create_from, buffer, copy_formatting,
c_line_in_traceback=self.c_line_in_traceback)
return result
def copyto(self, f):
self.buffer.copyto(f)
def getvalue(self):
return self.buffer.getvalue()
def write(self, s):
# also put invalid markers (lineno 0), to indicate that those lines
# have no Cython source code correspondence
if self.marker is None:
cython_lineno = self.last_marker_line
else:
cython_lineno = self.marker[0]
self.buffer.markers.extend([cython_lineno] * s.count('\n'))
self.buffer.write(s)
def insertion_point(self):
other = self.create_new(create_from=self, buffer=self.buffer.insertion_point(), copy_formatting=True)
return other
def new_writer(self):
"""
Creates a new CCodeWriter connected to the same global state, which
can later be inserted using insert.
"""
return CCodeWriter(create_from=self, c_line_in_traceback=self.c_line_in_traceback)
def insert(self, writer):
"""
Inserts the contents of another code writer (created with
the same global state) in the current location.
It is ok to write to the inserted writer also after insertion.
"""
assert writer.globalstate is self.globalstate
self.buffer.insert(writer.buffer)
# Properties delegated to function scope
label_counter = funccontext_property("label_counter")
return_label = funccontext_property("return_label")
error_label = funccontext_property("error_label")
labels_used = funccontext_property("labels_used")
continue_label = funccontext_property("continue_label")
break_label = funccontext_property("break_label")
return_from_error_cleanup_label = funccontext_property("return_from_error_cleanup_label")
# Functions delegated to function scope
def new_label(self, name=None): return self.funcstate.new_label(name)
def new_error_label(self): return self.funcstate.new_error_label()
def get_loop_labels(self): return self.funcstate.get_loop_labels()
def set_loop_labels(self, labels): return self.funcstate.set_loop_labels(labels)
def new_loop_labels(self): return self.funcstate.new_loop_labels()
def get_all_labels(self): return self.funcstate.get_all_labels()
def set_all_labels(self, labels): return self.funcstate.set_all_labels(labels)
def all_new_labels(self): return self.funcstate.all_new_labels()
def use_label(self, lbl): return self.funcstate.use_label(lbl)
def label_used(self, lbl): return self.funcstate.label_used(lbl)
def enter_cfunc_scope(self):
self.funcstate = FunctionState(self)
def exit_cfunc_scope(self):
self.funcstate = None
# constant handling
def get_py_num(self, str_value, longness):
return self.globalstate.get_int_const(str_value, longness).cname
def get_py_const(self, type, prefix='', cleanup_level=None):
return self.globalstate.get_py_const(type, prefix, cleanup_level).cname
def get_string_const(self, text):
return self.globalstate.get_string_const(text).cname
def get_py_string_const(self, text, identifier=None,
is_str=False, unicode_value=None):
return self.globalstate.get_py_string_const(
text, identifier, is_str, unicode_value).cname
def get_argument_default_const(self, type):
return self.globalstate.get_py_const(type).cname
def intern(self, text):
return self.get_py_string_const(text)
def intern_identifier(self, text):
return self.get_py_string_const(text, identifier=True)
def get_cached_constants_writer(self):
return self.globalstate.get_cached_constants_writer()
# code generation
def putln(self, code = "", safe=False):
if self.marker and self.bol:
self.emit_marker()
if self.emit_linenums and self.last_marker_line != 0:
self.write('\n#line %s "%s"\n' % (self.last_marker_line, self.source_desc))
if code:
if safe:
self.put_safe(code)
else:
self.put(code)
self.write("\n");
self.bol = 1
def emit_marker(self):
self.write("\n");
self.indent()
self.write("/* %s */\n" % self.marker[1])
self.last_marker_line = self.marker[0]
self.marker = None
def put_safe(self, code):
# put code, but ignore {}
self.write(code)
self.bol = 0
def put(self, code):
fix_indent = False
if "{" in code:
dl = code.count("{")
else:
dl = 0
if "}" in code:
dl -= code.count("}")
if dl < 0:
self.level += dl
elif dl == 0 and code[0] == "}":
# special cases like "} else {" need a temporary dedent
fix_indent = True
self.level -= 1
if self.bol:
self.indent()
self.write(code)
self.bol = 0
if dl > 0:
self.level += dl
elif fix_indent:
self.level += 1
def putln_tempita(self, code, **context):
from Cython.Tempita import sub
self.putln(sub(code, **context))
def put_tempita(self, code, **context):
from Cython.Tempita import sub
self.put(sub(code, **context))
def increase_indent(self):
self.level = self.level + 1
def decrease_indent(self):
self.level = self.level - 1
def begin_block(self):
self.putln("{")
self.increase_indent()
def end_block(self):
self.decrease_indent()
self.putln("}")
def indent(self):
self.write(" " * self.level)
def get_py_version_hex(self, pyversion):
return "0x%02X%02X%02X%02X" % (tuple(pyversion) + (0,0,0,0))[:4]
def mark_pos(self, pos):
if pos is None:
return
source_desc, line, col = pos
if self.last_marker_line == line:
return
assert isinstance(source_desc, SourceDescriptor)
contents = self.globalstate.commented_file_contents(source_desc)
lines = contents[max(0,line-3):line] # line numbers start at 1
lines[-1] += u' # <<<<<<<<<<<<<<'
lines += contents[line:line+2]
marker = u'"%s":%d\n%s\n' % (
source_desc.get_escaped_description(), line, u'\n'.join(lines))
self.marker = (line, marker)
if self.emit_linenums:
self.source_desc = source_desc.get_escaped_description()
def put_label(self, lbl):
if lbl in self.funcstate.labels_used:
self.putln("%s:;" % lbl)
def put_goto(self, lbl):
self.funcstate.use_label(lbl)
self.putln("goto %s;" % lbl)
def put_var_declaration(self, entry, storage_class="",
dll_linkage = None, definition = True):
#print "Code.put_var_declaration:", entry.name, "definition =", definition ###
if entry.visibility == 'private' and not (definition or entry.defined_in_pxd):
#print "...private and not definition, skipping", entry.cname ###
return
if entry.visibility == "private" and not entry.used:
#print "...private and not used, skipping", entry.cname ###
return
if storage_class:
self.put("%s " % storage_class)
if not entry.cf_used:
self.put('CYTHON_UNUSED ')
self.put(entry.type.declaration_code(
entry.cname, dll_linkage = dll_linkage))
if entry.init is not None:
self.put_safe(" = %s" % entry.type.literal_code(entry.init))
elif entry.type.is_pyobject:
self.put(" = NULL");
self.putln(";")
def put_temp_declarations(self, func_context):
for name, type, manage_ref in func_context.temps_allocated:
decl = type.declaration_code(name)
if type.is_pyobject:
self.putln("%s = NULL;" % decl)
elif type.is_memoryviewslice:
import MemoryView
self.putln("%s = %s;" % (decl, MemoryView.memslice_entry_init))
else:
self.putln("%s;" % decl)
def put_h_guard(self, guard):
self.putln("#ifndef %s" % guard)
self.putln("#define %s" % guard)
def unlikely(self, cond):
if Options.gcc_branch_hints:
return 'unlikely(%s)' % cond
else:
return cond
def build_function_modifiers(self, modifiers, mapper=modifier_output_mapper):
if not modifiers:
return ''
return '%s ' % ' '.join([mapper(m,m) for m in modifiers])
# Python objects and reference counting
def entry_as_pyobject(self, entry):
type = entry.type
if (not entry.is_self_arg and not entry.type.is_complete()
or entry.type.is_extension_type):
return "(PyObject *)" + entry.cname
else:
return entry.cname
def as_pyobject(self, cname, type):
from PyrexTypes import py_object_type, typecast
return typecast(py_object_type, type, cname)
def put_gotref(self, cname):
self.putln("__Pyx_GOTREF(%s);" % cname)
def put_giveref(self, cname):
self.putln("__Pyx_GIVEREF(%s);" % cname)
def put_xgiveref(self, cname):
self.putln("__Pyx_XGIVEREF(%s);" % cname)
def put_xgotref(self, cname):
self.putln("__Pyx_XGOTREF(%s);" % cname)
def put_incref(self, cname, type, nanny=True):
if nanny:
self.putln("__Pyx_INCREF(%s);" % self.as_pyobject(cname, type))
else:
self.putln("Py_INCREF(%s);" % self.as_pyobject(cname, type))
def put_decref(self, cname, type, nanny=True):
self._put_decref(cname, type, nanny, null_check=False, clear=False)
def put_var_gotref(self, entry):
if entry.type.is_pyobject:
self.putln("__Pyx_GOTREF(%s);" % self.entry_as_pyobject(entry))
def put_var_giveref(self, entry):
if entry.type.is_pyobject:
self.putln("__Pyx_GIVEREF(%s);" % self.entry_as_pyobject(entry))
def put_var_xgotref(self, entry):
if entry.type.is_pyobject:
self.putln("__Pyx_XGOTREF(%s);" % self.entry_as_pyobject(entry))
def put_var_xgiveref(self, entry):
if entry.type.is_pyobject:
self.putln("__Pyx_XGIVEREF(%s);" % self.entry_as_pyobject(entry))
def put_var_incref(self, entry):
if entry.type.is_pyobject:
self.putln("__Pyx_INCREF(%s);" % self.entry_as_pyobject(entry))
def put_decref_clear(self, cname, type, nanny=True, clear_before_decref=False):
self._put_decref(cname, type, nanny, null_check=False,
clear=True, clear_before_decref=clear_before_decref)
def put_xdecref(self, cname, type, nanny=True, have_gil=True):
self._put_decref(cname, type, nanny, null_check=True,
have_gil=have_gil, clear=False)
def put_xdecref_clear(self, cname, type, nanny=True, clear_before_decref=False):
self._put_decref(cname, type, nanny, null_check=True,
clear=True, clear_before_decref=clear_before_decref)
def _put_decref(self, cname, type, nanny=True, null_check=False,
have_gil=True, clear=False, clear_before_decref=False):
if type.is_memoryviewslice:
self.put_xdecref_memoryviewslice(cname, have_gil=have_gil)
return
prefix = nanny and '__Pyx' or 'Py'
X = null_check and 'X' or ''
if clear:
if clear_before_decref:
if not nanny:
X = '' # CPython doesn't have a Py_XCLEAR()
self.putln("%s_%sCLEAR(%s);" % (prefix, X, cname))
else:
self.putln("%s_%sDECREF(%s); %s = 0;" % (
prefix, X, self.as_pyobject(cname, type), cname))
else:
self.putln("%s_%sDECREF(%s);" % (
prefix, X, self.as_pyobject(cname, type)))
def put_var_decref(self, entry):
if entry.type.is_pyobject:
self.putln("__Pyx_XDECREF(%s);" % self.entry_as_pyobject(entry))
def put_var_xdecref(self, entry):
if entry.type.is_pyobject:
self.putln("__Pyx_XDECREF(%s);" % self.entry_as_pyobject(entry))
def put_var_decref_clear(self, entry):
self._put_var_decref_clear(entry, null_check=False)
def put_var_xdecref_clear(self, entry):
self._put_var_decref_clear(entry, null_check=True)
def _put_var_decref_clear(self, entry, null_check):
if entry.type.is_pyobject:
if entry.in_closure:
# reset before DECREF to make sure closure state is
# consistent during call to DECREF()
self.putln("__Pyx_%sCLEAR(%s);" % (
null_check and 'X' or '',
entry.cname))
else:
self.putln("__Pyx_%sDECREF(%s); %s = 0;" % (
null_check and 'X' or '',
self.entry_as_pyobject(entry),
entry.cname))
def put_var_decrefs(self, entries, used_only = 0):
for entry in entries:
if not used_only or entry.used:
if entry.xdecref_cleanup:
self.put_var_xdecref(entry)
else:
self.put_var_decref(entry)
def put_var_xdecrefs(self, entries):
for entry in entries:
self.put_var_xdecref(entry)
def put_var_xdecrefs_clear(self, entries):
for entry in entries:
self.put_var_xdecref_clear(entry)
def put_incref_memoryviewslice(self, slice_cname, have_gil=False):
import MemoryView
self.globalstate.use_utility_code(MemoryView.memviewslice_init_code)
self.putln("__PYX_INC_MEMVIEW(&%s, %d);" % (slice_cname, int(have_gil)))
def put_xdecref_memoryviewslice(self, slice_cname, have_gil=False):
import MemoryView
self.globalstate.use_utility_code(MemoryView.memviewslice_init_code)
self.putln("__PYX_XDEC_MEMVIEW(&%s, %d);" % (slice_cname, int(have_gil)))
def put_xgiveref_memoryviewslice(self, slice_cname):
self.put_xgiveref("%s.memview" % slice_cname)
def put_init_to_py_none(self, cname, type, nanny=True):
from PyrexTypes import py_object_type, typecast
py_none = typecast(type, py_object_type, "Py_None")
if nanny:
self.putln("%s = %s; __Pyx_INCREF(Py_None);" % (cname, py_none))
else:
self.putln("%s = %s; Py_INCREF(Py_None);" % (cname, py_none))
def put_init_var_to_py_none(self, entry, template = "%s", nanny=True):
code = template % entry.cname
#if entry.type.is_extension_type:
# code = "((PyObject*)%s)" % code
self.put_init_to_py_none(code, entry.type, nanny)
if entry.in_closure:
self.put_giveref('Py_None')
def put_pymethoddef(self, entry, term, allow_skip=True):
if entry.is_special or entry.name == '__getattribute__':
if entry.name not in ['__cinit__', '__dealloc__', '__richcmp__', '__next__', '__getreadbuffer__', '__getwritebuffer__', '__getsegcount__', '__getcharbuffer__', '__getbuffer__', '__releasebuffer__']:
if entry.name == '__getattr__' and not self.globalstate.directives['fast_getattr']:
pass
# Python's typeobject.c will automatically fill in our slot
# in add_operators() (called by PyType_Ready) with a value
# that's better than ours.
elif allow_skip:
return
from TypeSlots import method_coexist
if entry.doc:
doc_code = entry.doc_cname
else:
doc_code = 0
method_flags = entry.signature.method_flags()
if method_flags:
if entry.is_special:
method_flags += [method_coexist]
self.putln(
'{__Pyx_NAMESTR("%s"), (PyCFunction)%s, %s, __Pyx_DOCSTR(%s)}%s' % (
entry.name,
entry.func_cname,
"|".join(method_flags),
doc_code,
term))
# GIL methods
def put_ensure_gil(self, declare_gilstate=True):
"""
Acquire the GIL. The generated code is safe even when no PyThreadState
has been allocated for this thread (for threads not initialized by
using the Python API). Additionally, the code generated by this method
may be called recursively.
"""
self.globalstate.use_utility_code(
UtilityCode.load_cached("ForceInitThreads", "ModuleSetupCode.c"))
self.putln("#ifdef WITH_THREAD")
if declare_gilstate:
self.put("PyGILState_STATE ")
self.putln("__pyx_gilstate_save = PyGILState_Ensure();")
self.putln("#endif")
def put_release_ensured_gil(self):
"""
Releases the GIL, corresponds to `put_ensure_gil`.
"""
self.putln("#ifdef WITH_THREAD")
self.putln("PyGILState_Release(__pyx_gilstate_save);")
self.putln("#endif")
def put_acquire_gil(self):
"""
Acquire the GIL. The thread's thread state must have been initialized
by a previous `put_release_gil`
"""
self.putln("Py_BLOCK_THREADS")
def put_release_gil(self):
"Release the GIL, corresponds to `put_acquire_gil`."
self.putln("#ifdef WITH_THREAD")
self.putln("PyThreadState *_save = NULL;")
self.putln("#endif")
self.putln("Py_UNBLOCK_THREADS")
def declare_gilstate(self):
self.putln("#ifdef WITH_THREAD")
self.putln("PyGILState_STATE __pyx_gilstate_save;")
self.putln("#endif")
# error handling
def put_error_if_neg(self, pos, value):
# return self.putln("if (unlikely(%s < 0)) %s" % (value, self.error_goto(pos))) # TODO this path is almost _never_ taken, yet this macro makes is slower!
return self.putln("if (%s < 0) %s" % (value, self.error_goto(pos)))
def put_error_if_unbound(self, pos, entry, in_nogil_context=False):
import ExprNodes
if entry.from_closure:
func = '__Pyx_RaiseClosureNameError'
self.globalstate.use_utility_code(
ExprNodes.raise_closure_name_error_utility_code)
elif entry.type.is_memoryviewslice and in_nogil_context:
func = '__Pyx_RaiseUnboundMemoryviewSliceNogil'
self.globalstate.use_utility_code(
ExprNodes.raise_unbound_memoryview_utility_code_nogil)
else:
func = '__Pyx_RaiseUnboundLocalError'
self.globalstate.use_utility_code(
ExprNodes.raise_unbound_local_error_utility_code)
self.putln('if (unlikely(!%s)) { %s("%s"); %s }' % (
entry.type.check_for_null_code(entry.cname),
func,
entry.name,
self.error_goto(pos)))
def set_error_info(self, pos):
self.funcstate.should_declare_error_indicator = True
if self.c_line_in_traceback:
cinfo = " %s = %s;" % (Naming.clineno_cname, Naming.line_c_macro)
else:
cinfo = ""
return "%s = %s[%s]; %s = %s;%s" % (
Naming.filename_cname,
Naming.filetable_cname,
self.lookup_filename(pos[0]),
Naming.lineno_cname,
pos[1],
cinfo)
def error_goto(self, pos):
lbl = self.funcstate.error_label
self.funcstate.use_label(lbl)
return "{%s goto %s;}" % (
self.set_error_info(pos),
lbl)
def error_goto_if(self, cond, pos):
return "if (%s) %s" % (self.unlikely(cond), self.error_goto(pos))
def error_goto_if_null(self, cname, pos):
return self.error_goto_if("!%s" % cname, pos)
def error_goto_if_neg(self, cname, pos):
return self.error_goto_if("%s < 0" % cname, pos)
def error_goto_if_PyErr(self, pos):
return self.error_goto_if("PyErr_Occurred()", pos)
def lookup_filename(self, filename):
return self.globalstate.lookup_filename(filename)
def put_declare_refcount_context(self):
self.putln('__Pyx_RefNannyDeclarations')
def put_setup_refcount_context(self, name, acquire_gil=False):
if acquire_gil:
self.globalstate.use_utility_code(
UtilityCode.load_cached("ForceInitThreads", "ModuleSetupCode.c"))
self.putln('__Pyx_RefNannySetupContext("%s", %d);' % (name, acquire_gil and 1 or 0))
def put_finish_refcount_context(self):
self.putln("__Pyx_RefNannyFinishContext();")
def put_add_traceback(self, qualified_name):
"""
Build a Python traceback for propagating exceptions.
qualified_name should be the qualified name of the function
"""
format_tuple = (
qualified_name,
Naming.clineno_cname,
Naming.lineno_cname,
Naming.filename_cname,
)
self.putln('__Pyx_AddTraceback("%s", %s, %s, %s);' % format_tuple)
def put_trace_declarations(self):
self.putln('__Pyx_TraceDeclarations');
def put_trace_call(self, name, pos):
self.putln('__Pyx_TraceCall("%s", %s[%s], %s);' % (name, Naming.filetable_cname, self.lookup_filename(pos[0]), pos[1]));
def put_trace_exception(self):
self.putln("__Pyx_TraceException();")
def put_trace_return(self, retvalue_cname):
self.putln("__Pyx_TraceReturn(%s);" % retvalue_cname)
def putln_openmp(self, string):
self.putln("#ifdef _OPENMP")
self.putln(string)
self.putln("#endif /* _OPENMP */")
def undef_builtin_expect(self, cond):
"""
Redefine the macros likely() and unlikely to no-ops, depending on
condition 'cond'
"""
self.putln("#if %s" % cond)
self.putln(" #undef likely")
self.putln(" #undef unlikely")
self.putln(" #define likely(x) (x)")
self.putln(" #define unlikely(x) (x)")
self.putln("#endif")
def redef_builtin_expect(self, cond):
self.putln("#if %s" % cond)
self.putln(" #undef likely")
self.putln(" #undef unlikely")
self.putln(" #define likely(x) __builtin_expect(!!(x), 1)")
self.putln(" #define unlikely(x) __builtin_expect(!!(x), 0)")
self.putln("#endif")
class PyrexCodeWriter(object):
# f file output file
# level int indentation level
def __init__(self, outfile_name):
self.f = Utils.open_new_file(outfile_name)
self.level = 0
def putln(self, code):
self.f.write("%s%s\n" % (" " * self.level, code))
def indent(self):
self.level += 1
def dedent(self):
self.level -= 1
class PyxCodeWriter(object):
"""
Can be used for writing out some Cython code. To use the indenter
functionality, the Cython.Compiler.Importer module will have to be used
to load the code to support python 2.4
"""
def __init__(self, buffer=None, indent_level=0, context=None, encoding='ascii'):
self.buffer = buffer or StringIOTree()
self.level = indent_level
self.context = context
self.encoding = encoding
def indent(self, levels=1):
self.level += levels
return True
def dedent(self, levels=1):
self.level -= levels
def indenter(self, line):
"""
Instead of
with pyx_code.indenter("for i in range(10):"):
pyx_code.putln("print i")
write
if pyx_code.indenter("for i in range(10);"):
pyx_code.putln("print i")
pyx_code.dedent()
"""
self.putln(line)
self.indent()
return True
def getvalue(self):
result = self.buffer.getvalue()
if not isinstance(result, unicode):
result = result.decode(self.encoding)
return result
def putln(self, line, context=None):
context = context or self.context
if context:
line = sub_tempita(line, context)
self._putln(line)
def _putln(self, line):
self.buffer.write("%s%s\n" % (self.level * " ", line))
def put_chunk(self, chunk, context=None):
context = context or self.context
if context:
chunk = sub_tempita(chunk, context)
chunk = textwrap.dedent(chunk)
for line in chunk.splitlines():
self._putln(line)
def insertion_point(self):
return PyxCodeWriter(self.buffer.insertion_point(), self.level,
self.context)
def named_insertion_point(self, name):
setattr(self, name, self.insertion_point())
class ClosureTempAllocator(object):
def __init__(self, klass):
self.klass = klass
self.temps_allocated = {}
self.temps_free = {}
self.temps_count = 0
def reset(self):
for type, cnames in self.temps_allocated.items():
self.temps_free[type] = list(cnames)
def allocate_temp(self, type):
if not type in self.temps_allocated:
self.temps_allocated[type] = []
self.temps_free[type] = []
elif self.temps_free[type]:
return self.temps_free[type].pop(0)
cname = '%s%d' % (Naming.codewriter_temp_prefix, self.temps_count)
self.klass.declare_var(pos=None, name=cname, cname=cname, type=type, is_cdef=True)
self.temps_allocated[type].append(cname)
self.temps_count += 1
return cname
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