mirror of
https://github.com/python/cpython.git
synced 2025-08-04 00:48:58 +00:00
81 lines
2.2 KiB
Python
81 lines
2.2 KiB
Python
from collections import namedtuple
|
|
|
|
from c_analyzer_common import info, util
|
|
from c_analyzer_common.util import classonly, _NTBase
|
|
|
|
|
|
def normalize_vartype(vartype):
|
|
"""Return the canonical form for a variable type (or func signature)."""
|
|
# We allow empty strring through for semantic reasons.
|
|
if vartype is None:
|
|
return None
|
|
|
|
# XXX finish!
|
|
# XXX Return (modifiers, type, pointer)?
|
|
return str(vartype)
|
|
|
|
|
|
class Variable(_NTBase,
|
|
namedtuple('Variable', 'id vartype')):
|
|
"""Information about a single variable declaration."""
|
|
|
|
__slots__ = ()
|
|
_isglobal = util.Slot()
|
|
|
|
def __del__(self):
|
|
del self._isglobal
|
|
|
|
@classonly
|
|
def from_parts(cls, filename, funcname, name, vartype, isglobal=False):
|
|
id = info.ID(filename, funcname, name)
|
|
self = cls(id, vartype)
|
|
if isglobal:
|
|
self._isglobal = True
|
|
return self
|
|
|
|
def __new__(cls, id, vartype):
|
|
self = super().__new__(
|
|
cls,
|
|
id=info.ID.from_raw(id),
|
|
vartype=normalize_vartype(vartype) if vartype else None,
|
|
)
|
|
return self
|
|
|
|
def __hash__(self):
|
|
return hash(self.id)
|
|
|
|
def __getattr__(self, name):
|
|
return getattr(self.id, name)
|
|
|
|
def _validate_id(self):
|
|
if not self.id:
|
|
raise TypeError('missing id')
|
|
|
|
if not self.filename or self.filename == info.UNKNOWN:
|
|
raise TypeError(f'id missing filename ({self.id})')
|
|
|
|
if self.funcname and self.funcname == info.UNKNOWN:
|
|
raise TypeError(f'id missing funcname ({self.id})')
|
|
|
|
self.id.validate()
|
|
|
|
def validate(self):
|
|
"""Fail if the object is invalid (i.e. init with bad data)."""
|
|
self._validate_id()
|
|
|
|
if self.vartype is None or self.vartype == info.UNKNOWN:
|
|
raise TypeError('missing vartype')
|
|
|
|
@property
|
|
def isglobal(self):
|
|
try:
|
|
return self._isglobal
|
|
except AttributeError:
|
|
# XXX Include extern variables.
|
|
# XXX Ignore functions.
|
|
self._isglobal = ('static' in self.vartype.split())
|
|
return self._isglobal
|
|
|
|
@property
|
|
def isconst(self):
|
|
return 'const' in self.vartype.split()
|