2013-10-11 17:28:32 +00:00
|
|
|
|
|
|
|
from . import api, model
|
|
|
|
from .commontypes import COMMON_TYPES, resolve_common_type
|
|
|
|
try:
|
|
|
|
from . import _pycparser as pycparser
|
|
|
|
except ImportError:
|
|
|
|
import pycparser
|
|
|
|
import weakref, re, sys
|
|
|
|
|
|
|
|
try:
|
|
|
|
if sys.version_info < (3,):
|
|
|
|
import thread as _thread
|
|
|
|
else:
|
|
|
|
import _thread
|
|
|
|
lock = _thread.allocate_lock()
|
|
|
|
except ImportError:
|
|
|
|
lock = None
|
|
|
|
|
|
|
|
_r_comment = re.compile(r"/\*.*?\*/|//.*?$", re.DOTALL | re.MULTILINE)
|
|
|
|
_r_define = re.compile(r"^\s*#\s*define\s+([A-Za-z_][A-Za-z_0-9]*)\s+(.*?)$",
|
|
|
|
re.MULTILINE)
|
|
|
|
_r_partial_enum = re.compile(r"=\s*\.\.\.\s*[,}]|\.\.\.\s*\}")
|
|
|
|
_r_enum_dotdotdot = re.compile(r"__dotdotdot\d+__$")
|
|
|
|
_r_partial_array = re.compile(r"\[\s*\.\.\.\s*\]")
|
|
|
|
_r_words = re.compile(r"\w+|\S")
|
|
|
|
_parser_cache = None
|
2014-09-05 16:01:36 +00:00
|
|
|
_r_int_literal = re.compile(r"^0?x?[0-9a-f]+u?l?$", re.IGNORECASE)
|
2013-10-11 17:28:32 +00:00
|
|
|
|
|
|
|
def _get_parser():
|
|
|
|
global _parser_cache
|
|
|
|
if _parser_cache is None:
|
|
|
|
_parser_cache = pycparser.CParser()
|
|
|
|
return _parser_cache
|
|
|
|
|
|
|
|
def _preprocess(csource):
|
|
|
|
# Remove comments. NOTE: this only work because the cdef() section
|
|
|
|
# should not contain any string literal!
|
|
|
|
csource = _r_comment.sub(' ', csource)
|
|
|
|
# Remove the "#define FOO x" lines
|
|
|
|
macros = {}
|
|
|
|
for match in _r_define.finditer(csource):
|
|
|
|
macroname, macrovalue = match.groups()
|
|
|
|
macros[macroname] = macrovalue
|
|
|
|
csource = _r_define.sub('', csource)
|
|
|
|
# Replace "[...]" with "[__dotdotdotarray__]"
|
|
|
|
csource = _r_partial_array.sub('[__dotdotdotarray__]', csource)
|
|
|
|
# Replace "...}" with "__dotdotdotNUM__}". This construction should
|
|
|
|
# occur only at the end of enums; at the end of structs we have "...;}"
|
|
|
|
# and at the end of vararg functions "...);". Also replace "=...[,}]"
|
|
|
|
# with ",__dotdotdotNUM__[,}]": this occurs in the enums too, when
|
|
|
|
# giving an unknown value.
|
|
|
|
matches = list(_r_partial_enum.finditer(csource))
|
|
|
|
for number, match in enumerate(reversed(matches)):
|
|
|
|
p = match.start()
|
|
|
|
if csource[p] == '=':
|
|
|
|
p2 = csource.find('...', p, match.end())
|
|
|
|
assert p2 > p
|
|
|
|
csource = '%s,__dotdotdot%d__ %s' % (csource[:p], number,
|
|
|
|
csource[p2+3:])
|
|
|
|
else:
|
|
|
|
assert csource[p:p+3] == '...'
|
|
|
|
csource = '%s __dotdotdot%d__ %s' % (csource[:p], number,
|
|
|
|
csource[p+3:])
|
|
|
|
# Replace all remaining "..." with the same name, "__dotdotdot__",
|
|
|
|
# which is declared with a typedef for the purpose of C parsing.
|
|
|
|
return csource.replace('...', ' __dotdotdot__ '), macros
|
|
|
|
|
|
|
|
def _common_type_names(csource):
|
|
|
|
# Look in the source for what looks like usages of types from the
|
|
|
|
# list of common types. A "usage" is approximated here as the
|
|
|
|
# appearance of the word, minus a "definition" of the type, which
|
|
|
|
# is the last word in a "typedef" statement. Approximative only
|
|
|
|
# but should be fine for all the common types.
|
|
|
|
look_for_words = set(COMMON_TYPES)
|
|
|
|
look_for_words.add(';')
|
|
|
|
look_for_words.add('typedef')
|
|
|
|
words_used = set()
|
|
|
|
is_typedef = False
|
|
|
|
previous_word = ''
|
|
|
|
for word in _r_words.findall(csource):
|
|
|
|
if word in look_for_words:
|
|
|
|
if word == ';':
|
|
|
|
if is_typedef:
|
|
|
|
words_used.discard(previous_word)
|
|
|
|
look_for_words.discard(previous_word)
|
|
|
|
is_typedef = False
|
|
|
|
elif word == 'typedef':
|
|
|
|
is_typedef = True
|
|
|
|
else: # word in COMMON_TYPES
|
|
|
|
words_used.add(word)
|
|
|
|
previous_word = word
|
|
|
|
return words_used
|
|
|
|
|
|
|
|
|
|
|
|
class Parser(object):
|
|
|
|
|
|
|
|
def __init__(self):
|
|
|
|
self._declarations = {}
|
|
|
|
self._anonymous_counter = 0
|
|
|
|
self._structnode2type = weakref.WeakKeyDictionary()
|
|
|
|
self._override = False
|
|
|
|
self._packed = False
|
2014-09-05 16:01:36 +00:00
|
|
|
self._int_constants = {}
|
2013-10-11 17:28:32 +00:00
|
|
|
|
|
|
|
def _parse(self, csource):
|
|
|
|
csource, macros = _preprocess(csource)
|
|
|
|
# XXX: for more efficiency we would need to poke into the
|
|
|
|
# internals of CParser... the following registers the
|
|
|
|
# typedefs, because their presence or absence influences the
|
|
|
|
# parsing itself (but what they are typedef'ed to plays no role)
|
|
|
|
ctn = _common_type_names(csource)
|
|
|
|
typenames = []
|
|
|
|
for name in sorted(self._declarations):
|
|
|
|
if name.startswith('typedef '):
|
|
|
|
name = name[8:]
|
|
|
|
typenames.append(name)
|
|
|
|
ctn.discard(name)
|
|
|
|
typenames += sorted(ctn)
|
|
|
|
#
|
|
|
|
csourcelines = ['typedef int %s;' % typename for typename in typenames]
|
|
|
|
csourcelines.append('typedef int __dotdotdot__;')
|
|
|
|
csourcelines.append(csource)
|
|
|
|
csource = '\n'.join(csourcelines)
|
|
|
|
if lock is not None:
|
|
|
|
lock.acquire() # pycparser is not thread-safe...
|
|
|
|
try:
|
|
|
|
ast = _get_parser().parse(csource)
|
|
|
|
except pycparser.c_parser.ParseError as e:
|
|
|
|
self.convert_pycparser_error(e, csource)
|
|
|
|
finally:
|
|
|
|
if lock is not None:
|
|
|
|
lock.release()
|
2014-09-05 16:01:36 +00:00
|
|
|
# csource will be used to find buggy source text
|
|
|
|
return ast, macros, csource
|
2013-10-11 17:28:32 +00:00
|
|
|
|
2014-09-05 16:01:36 +00:00
|
|
|
def _convert_pycparser_error(self, e, csource):
|
2013-10-11 17:28:32 +00:00
|
|
|
# xxx look for ":NUM:" at the start of str(e) and try to interpret
|
|
|
|
# it as a line number
|
|
|
|
line = None
|
|
|
|
msg = str(e)
|
|
|
|
if msg.startswith(':') and ':' in msg[1:]:
|
|
|
|
linenum = msg[1:msg.find(':',1)]
|
|
|
|
if linenum.isdigit():
|
|
|
|
linenum = int(linenum, 10)
|
|
|
|
csourcelines = csource.splitlines()
|
|
|
|
if 1 <= linenum <= len(csourcelines):
|
|
|
|
line = csourcelines[linenum-1]
|
2014-09-05 16:01:36 +00:00
|
|
|
return line
|
|
|
|
|
|
|
|
def convert_pycparser_error(self, e, csource):
|
|
|
|
line = self._convert_pycparser_error(e, csource)
|
|
|
|
|
|
|
|
msg = str(e)
|
2013-10-11 17:28:32 +00:00
|
|
|
if line:
|
|
|
|
msg = 'cannot parse "%s"\n%s' % (line.strip(), msg)
|
|
|
|
else:
|
|
|
|
msg = 'parse error\n%s' % (msg,)
|
|
|
|
raise api.CDefError(msg)
|
|
|
|
|
|
|
|
def parse(self, csource, override=False, packed=False):
|
|
|
|
prev_override = self._override
|
|
|
|
prev_packed = self._packed
|
|
|
|
try:
|
|
|
|
self._override = override
|
|
|
|
self._packed = packed
|
|
|
|
self._internal_parse(csource)
|
|
|
|
finally:
|
|
|
|
self._override = prev_override
|
|
|
|
self._packed = prev_packed
|
|
|
|
|
|
|
|
def _internal_parse(self, csource):
|
2014-09-05 16:01:36 +00:00
|
|
|
ast, macros, csource = self._parse(csource)
|
2013-10-11 17:28:32 +00:00
|
|
|
# add the macros
|
2014-09-05 16:01:36 +00:00
|
|
|
self._process_macros(macros)
|
2013-10-11 17:28:32 +00:00
|
|
|
# find the first "__dotdotdot__" and use that as a separator
|
|
|
|
# between the repeated typedefs and the real csource
|
|
|
|
iterator = iter(ast.ext)
|
|
|
|
for decl in iterator:
|
|
|
|
if decl.name == '__dotdotdot__':
|
|
|
|
break
|
|
|
|
#
|
2014-09-05 16:01:36 +00:00
|
|
|
try:
|
|
|
|
for decl in iterator:
|
|
|
|
if isinstance(decl, pycparser.c_ast.Decl):
|
|
|
|
self._parse_decl(decl)
|
|
|
|
elif isinstance(decl, pycparser.c_ast.Typedef):
|
|
|
|
if not decl.name:
|
|
|
|
raise api.CDefError("typedef does not declare any name",
|
|
|
|
decl)
|
|
|
|
if (isinstance(decl.type.type, pycparser.c_ast.IdentifierType)
|
|
|
|
and decl.type.type.names == ['__dotdotdot__']):
|
|
|
|
realtype = model.unknown_type(decl.name)
|
|
|
|
elif (isinstance(decl.type, pycparser.c_ast.PtrDecl) and
|
|
|
|
isinstance(decl.type.type, pycparser.c_ast.TypeDecl) and
|
|
|
|
isinstance(decl.type.type.type,
|
|
|
|
pycparser.c_ast.IdentifierType) and
|
|
|
|
decl.type.type.type.names == ['__dotdotdot__']):
|
|
|
|
realtype = model.unknown_ptr_type(decl.name)
|
|
|
|
else:
|
|
|
|
realtype = self._get_type(decl.type, name=decl.name)
|
|
|
|
self._declare('typedef ' + decl.name, realtype)
|
2013-10-11 17:28:32 +00:00
|
|
|
else:
|
2014-09-05 16:01:36 +00:00
|
|
|
raise api.CDefError("unrecognized construct", decl)
|
|
|
|
except api.FFIError as e:
|
|
|
|
msg = self._convert_pycparser_error(e, csource)
|
|
|
|
if msg:
|
|
|
|
e.args = (e.args[0] + "\n *** Err: %s" % msg,)
|
|
|
|
raise
|
|
|
|
|
|
|
|
def _add_constants(self, key, val):
|
|
|
|
if key in self._int_constants:
|
|
|
|
raise api.FFIError(
|
|
|
|
"multiple declarations of constant: %s" % (key,))
|
|
|
|
self._int_constants[key] = val
|
|
|
|
|
|
|
|
def _process_macros(self, macros):
|
|
|
|
for key, value in macros.items():
|
|
|
|
value = value.strip()
|
|
|
|
match = _r_int_literal.search(value)
|
|
|
|
if match is not None:
|
|
|
|
int_str = match.group(0).lower().rstrip("ul")
|
|
|
|
|
|
|
|
# "010" is not valid oct in py3
|
|
|
|
if (int_str.startswith("0") and
|
|
|
|
int_str != "0" and
|
|
|
|
not int_str.startswith("0x")):
|
|
|
|
int_str = "0o" + int_str[1:]
|
|
|
|
|
|
|
|
pyvalue = int(int_str, 0)
|
|
|
|
self._add_constants(key, pyvalue)
|
|
|
|
elif value == '...':
|
|
|
|
self._declare('macro ' + key, value)
|
2013-10-11 17:28:32 +00:00
|
|
|
else:
|
2014-09-05 16:01:36 +00:00
|
|
|
raise api.CDefError('only supports the syntax "#define '
|
|
|
|
'%s ..." (literally) or "#define '
|
|
|
|
'%s 0x1FF" for now' % (key, key))
|
2013-10-11 17:28:32 +00:00
|
|
|
|
|
|
|
def _parse_decl(self, decl):
|
|
|
|
node = decl.type
|
|
|
|
if isinstance(node, pycparser.c_ast.FuncDecl):
|
|
|
|
tp = self._get_type(node, name=decl.name)
|
|
|
|
assert isinstance(tp, model.RawFunctionType)
|
|
|
|
tp = self._get_type_pointer(tp)
|
|
|
|
self._declare('function ' + decl.name, tp)
|
|
|
|
else:
|
|
|
|
if isinstance(node, pycparser.c_ast.Struct):
|
|
|
|
# XXX do we need self._declare in any of those?
|
|
|
|
if node.decls is not None:
|
|
|
|
self._get_struct_union_enum_type('struct', node)
|
|
|
|
elif isinstance(node, pycparser.c_ast.Union):
|
|
|
|
if node.decls is not None:
|
|
|
|
self._get_struct_union_enum_type('union', node)
|
|
|
|
elif isinstance(node, pycparser.c_ast.Enum):
|
|
|
|
if node.values is not None:
|
|
|
|
self._get_struct_union_enum_type('enum', node)
|
|
|
|
elif not decl.name:
|
|
|
|
raise api.CDefError("construct does not declare any variable",
|
|
|
|
decl)
|
|
|
|
#
|
|
|
|
if decl.name:
|
|
|
|
tp = self._get_type(node, partial_length_ok=True)
|
|
|
|
if self._is_constant_globalvar(node):
|
|
|
|
self._declare('constant ' + decl.name, tp)
|
|
|
|
else:
|
|
|
|
self._declare('variable ' + decl.name, tp)
|
|
|
|
|
|
|
|
def parse_type(self, cdecl):
|
2014-09-05 16:01:36 +00:00
|
|
|
ast, macros = self._parse('void __dummy(\n%s\n);' % cdecl)[:2]
|
2013-10-11 17:28:32 +00:00
|
|
|
assert not macros
|
|
|
|
exprnode = ast.ext[-1].type.args.params[0]
|
|
|
|
if isinstance(exprnode, pycparser.c_ast.ID):
|
|
|
|
raise api.CDefError("unknown identifier '%s'" % (exprnode.name,))
|
|
|
|
return self._get_type(exprnode.type)
|
|
|
|
|
|
|
|
def _declare(self, name, obj):
|
|
|
|
if name in self._declarations:
|
|
|
|
if self._declarations[name] is obj:
|
|
|
|
return
|
|
|
|
if not self._override:
|
|
|
|
raise api.FFIError(
|
|
|
|
"multiple declarations of %s (for interactive usage, "
|
|
|
|
"try cdef(xx, override=True))" % (name,))
|
|
|
|
assert '__dotdotdot__' not in name.split()
|
|
|
|
self._declarations[name] = obj
|
|
|
|
|
|
|
|
def _get_type_pointer(self, type, const=False):
|
|
|
|
if isinstance(type, model.RawFunctionType):
|
|
|
|
return type.as_function_pointer()
|
|
|
|
if const:
|
|
|
|
return model.ConstPointerType(type)
|
|
|
|
return model.PointerType(type)
|
|
|
|
|
|
|
|
def _get_type(self, typenode, name=None, partial_length_ok=False):
|
|
|
|
# first, dereference typedefs, if we have it already parsed, we're good
|
|
|
|
if (isinstance(typenode, pycparser.c_ast.TypeDecl) and
|
|
|
|
isinstance(typenode.type, pycparser.c_ast.IdentifierType) and
|
|
|
|
len(typenode.type.names) == 1 and
|
|
|
|
('typedef ' + typenode.type.names[0]) in self._declarations):
|
|
|
|
type = self._declarations['typedef ' + typenode.type.names[0]]
|
|
|
|
return type
|
|
|
|
#
|
|
|
|
if isinstance(typenode, pycparser.c_ast.ArrayDecl):
|
|
|
|
# array type
|
|
|
|
if typenode.dim is None:
|
|
|
|
length = None
|
|
|
|
else:
|
|
|
|
length = self._parse_constant(
|
|
|
|
typenode.dim, partial_length_ok=partial_length_ok)
|
|
|
|
return model.ArrayType(self._get_type(typenode.type), length)
|
|
|
|
#
|
|
|
|
if isinstance(typenode, pycparser.c_ast.PtrDecl):
|
|
|
|
# pointer type
|
|
|
|
const = (isinstance(typenode.type, pycparser.c_ast.TypeDecl)
|
|
|
|
and 'const' in typenode.type.quals)
|
|
|
|
return self._get_type_pointer(self._get_type(typenode.type), const)
|
|
|
|
#
|
|
|
|
if isinstance(typenode, pycparser.c_ast.TypeDecl):
|
|
|
|
type = typenode.type
|
|
|
|
if isinstance(type, pycparser.c_ast.IdentifierType):
|
|
|
|
# assume a primitive type. get it from .names, but reduce
|
|
|
|
# synonyms to a single chosen combination
|
|
|
|
names = list(type.names)
|
|
|
|
if names != ['signed', 'char']: # keep this unmodified
|
|
|
|
prefixes = {}
|
|
|
|
while names:
|
|
|
|
name = names[0]
|
|
|
|
if name in ('short', 'long', 'signed', 'unsigned'):
|
|
|
|
prefixes[name] = prefixes.get(name, 0) + 1
|
|
|
|
del names[0]
|
|
|
|
else:
|
|
|
|
break
|
|
|
|
# ignore the 'signed' prefix below, and reorder the others
|
|
|
|
newnames = []
|
|
|
|
for prefix in ('unsigned', 'short', 'long'):
|
|
|
|
for i in range(prefixes.get(prefix, 0)):
|
|
|
|
newnames.append(prefix)
|
|
|
|
if not names:
|
|
|
|
names = ['int'] # implicitly
|
|
|
|
if names == ['int']: # but kill it if 'short' or 'long'
|
|
|
|
if 'short' in prefixes or 'long' in prefixes:
|
|
|
|
names = []
|
|
|
|
names = newnames + names
|
|
|
|
ident = ' '.join(names)
|
|
|
|
if ident == 'void':
|
|
|
|
return model.void_type
|
|
|
|
if ident == '__dotdotdot__':
|
2014-09-05 16:01:36 +00:00
|
|
|
raise api.FFIError(':%d: bad usage of "..."' %
|
|
|
|
typenode.coord.line)
|
2013-10-11 17:28:32 +00:00
|
|
|
return resolve_common_type(ident)
|
|
|
|
#
|
|
|
|
if isinstance(type, pycparser.c_ast.Struct):
|
|
|
|
# 'struct foobar'
|
|
|
|
return self._get_struct_union_enum_type('struct', type, name)
|
|
|
|
#
|
|
|
|
if isinstance(type, pycparser.c_ast.Union):
|
|
|
|
# 'union foobar'
|
|
|
|
return self._get_struct_union_enum_type('union', type, name)
|
|
|
|
#
|
|
|
|
if isinstance(type, pycparser.c_ast.Enum):
|
|
|
|
# 'enum foobar'
|
|
|
|
return self._get_struct_union_enum_type('enum', type, name)
|
|
|
|
#
|
|
|
|
if isinstance(typenode, pycparser.c_ast.FuncDecl):
|
|
|
|
# a function type
|
|
|
|
return self._parse_function_type(typenode, name)
|
|
|
|
#
|
|
|
|
# nested anonymous structs or unions end up here
|
|
|
|
if isinstance(typenode, pycparser.c_ast.Struct):
|
|
|
|
return self._get_struct_union_enum_type('struct', typenode, name,
|
|
|
|
nested=True)
|
|
|
|
if isinstance(typenode, pycparser.c_ast.Union):
|
|
|
|
return self._get_struct_union_enum_type('union', typenode, name,
|
|
|
|
nested=True)
|
|
|
|
#
|
2014-09-05 16:01:36 +00:00
|
|
|
raise api.FFIError(":%d: bad or unsupported type declaration" %
|
|
|
|
typenode.coord.line)
|
2013-10-11 17:28:32 +00:00
|
|
|
|
|
|
|
def _parse_function_type(self, typenode, funcname=None):
|
|
|
|
params = list(getattr(typenode.args, 'params', []))
|
|
|
|
ellipsis = (
|
|
|
|
len(params) > 0 and
|
|
|
|
isinstance(params[-1].type, pycparser.c_ast.TypeDecl) and
|
|
|
|
isinstance(params[-1].type.type,
|
|
|
|
pycparser.c_ast.IdentifierType) and
|
|
|
|
params[-1].type.type.names == ['__dotdotdot__'])
|
|
|
|
if ellipsis:
|
|
|
|
params.pop()
|
|
|
|
if not params:
|
|
|
|
raise api.CDefError(
|
|
|
|
"%s: a function with only '(...)' as argument"
|
|
|
|
" is not correct C" % (funcname or 'in expression'))
|
|
|
|
elif (len(params) == 1 and
|
|
|
|
isinstance(params[0].type, pycparser.c_ast.TypeDecl) and
|
|
|
|
isinstance(params[0].type.type, pycparser.c_ast.IdentifierType)
|
|
|
|
and list(params[0].type.type.names) == ['void']):
|
|
|
|
del params[0]
|
|
|
|
args = [self._as_func_arg(self._get_type(argdeclnode.type))
|
|
|
|
for argdeclnode in params]
|
|
|
|
result = self._get_type(typenode.type)
|
|
|
|
return model.RawFunctionType(tuple(args), result, ellipsis)
|
|
|
|
|
|
|
|
def _as_func_arg(self, type):
|
|
|
|
if isinstance(type, model.ArrayType):
|
|
|
|
return model.PointerType(type.item)
|
|
|
|
elif isinstance(type, model.RawFunctionType):
|
|
|
|
return type.as_function_pointer()
|
|
|
|
else:
|
|
|
|
return type
|
|
|
|
|
|
|
|
def _is_constant_globalvar(self, typenode):
|
|
|
|
if isinstance(typenode, pycparser.c_ast.PtrDecl):
|
|
|
|
return 'const' in typenode.quals
|
|
|
|
if isinstance(typenode, pycparser.c_ast.TypeDecl):
|
|
|
|
return 'const' in typenode.quals
|
|
|
|
return False
|
|
|
|
|
|
|
|
def _get_struct_union_enum_type(self, kind, type, name=None, nested=False):
|
|
|
|
# First, a level of caching on the exact 'type' node of the AST.
|
|
|
|
# This is obscure, but needed because pycparser "unrolls" declarations
|
|
|
|
# such as "typedef struct { } foo_t, *foo_p" and we end up with
|
|
|
|
# an AST that is not a tree, but a DAG, with the "type" node of the
|
|
|
|
# two branches foo_t and foo_p of the trees being the same node.
|
|
|
|
# It's a bit silly but detecting "DAG-ness" in the AST tree seems
|
|
|
|
# to be the only way to distinguish this case from two independent
|
|
|
|
# structs. See test_struct_with_two_usages.
|
|
|
|
try:
|
|
|
|
return self._structnode2type[type]
|
|
|
|
except KeyError:
|
|
|
|
pass
|
|
|
|
#
|
|
|
|
# Note that this must handle parsing "struct foo" any number of
|
|
|
|
# times and always return the same StructType object. Additionally,
|
|
|
|
# one of these times (not necessarily the first), the fields of
|
|
|
|
# the struct can be specified with "struct foo { ...fields... }".
|
|
|
|
# If no name is given, then we have to create a new anonymous struct
|
|
|
|
# with no caching; in this case, the fields are either specified
|
|
|
|
# right now or never.
|
|
|
|
#
|
|
|
|
force_name = name
|
|
|
|
name = type.name
|
|
|
|
#
|
|
|
|
# get the type or create it if needed
|
|
|
|
if name is None:
|
|
|
|
# 'force_name' is used to guess a more readable name for
|
|
|
|
# anonymous structs, for the common case "typedef struct { } foo".
|
|
|
|
if force_name is not None:
|
|
|
|
explicit_name = '$%s' % force_name
|
|
|
|
else:
|
|
|
|
self._anonymous_counter += 1
|
|
|
|
explicit_name = '$%d' % self._anonymous_counter
|
|
|
|
tp = None
|
|
|
|
else:
|
|
|
|
explicit_name = name
|
|
|
|
key = '%s %s' % (kind, name)
|
|
|
|
tp = self._declarations.get(key, None)
|
|
|
|
#
|
|
|
|
if tp is None:
|
|
|
|
if kind == 'struct':
|
|
|
|
tp = model.StructType(explicit_name, None, None, None)
|
|
|
|
elif kind == 'union':
|
|
|
|
tp = model.UnionType(explicit_name, None, None, None)
|
|
|
|
elif kind == 'enum':
|
|
|
|
tp = self._build_enum_type(explicit_name, type.values)
|
|
|
|
else:
|
|
|
|
raise AssertionError("kind = %r" % (kind,))
|
|
|
|
if name is not None:
|
|
|
|
self._declare(key, tp)
|
|
|
|
else:
|
|
|
|
if kind == 'enum' and type.values is not None:
|
|
|
|
raise NotImplementedError(
|
|
|
|
"enum %s: the '{}' declaration should appear on the first "
|
|
|
|
"time the enum is mentioned, not later" % explicit_name)
|
|
|
|
if not tp.forcename:
|
|
|
|
tp.force_the_name(force_name)
|
|
|
|
if tp.forcename and '$' in tp.name:
|
|
|
|
self._declare('anonymous %s' % tp.forcename, tp)
|
|
|
|
#
|
|
|
|
self._structnode2type[type] = tp
|
|
|
|
#
|
|
|
|
# enums: done here
|
|
|
|
if kind == 'enum':
|
|
|
|
return tp
|
|
|
|
#
|
|
|
|
# is there a 'type.decls'? If yes, then this is the place in the
|
|
|
|
# C sources that declare the fields. If no, then just return the
|
|
|
|
# existing type, possibly still incomplete.
|
|
|
|
if type.decls is None:
|
|
|
|
return tp
|
|
|
|
#
|
|
|
|
if tp.fldnames is not None:
|
|
|
|
raise api.CDefError("duplicate declaration of struct %s" % name)
|
|
|
|
fldnames = []
|
|
|
|
fldtypes = []
|
|
|
|
fldbitsize = []
|
|
|
|
for decl in type.decls:
|
|
|
|
if (isinstance(decl.type, pycparser.c_ast.IdentifierType) and
|
|
|
|
''.join(decl.type.names) == '__dotdotdot__'):
|
|
|
|
# XXX pycparser is inconsistent: 'names' should be a list
|
|
|
|
# of strings, but is sometimes just one string. Use
|
|
|
|
# str.join() as a way to cope with both.
|
|
|
|
self._make_partial(tp, nested)
|
|
|
|
continue
|
|
|
|
if decl.bitsize is None:
|
|
|
|
bitsize = -1
|
|
|
|
else:
|
|
|
|
bitsize = self._parse_constant(decl.bitsize)
|
|
|
|
self._partial_length = False
|
|
|
|
type = self._get_type(decl.type, partial_length_ok=True)
|
|
|
|
if self._partial_length:
|
|
|
|
self._make_partial(tp, nested)
|
|
|
|
if isinstance(type, model.StructType) and type.partial:
|
|
|
|
self._make_partial(tp, nested)
|
|
|
|
fldnames.append(decl.name or '')
|
|
|
|
fldtypes.append(type)
|
|
|
|
fldbitsize.append(bitsize)
|
|
|
|
tp.fldnames = tuple(fldnames)
|
|
|
|
tp.fldtypes = tuple(fldtypes)
|
|
|
|
tp.fldbitsize = tuple(fldbitsize)
|
|
|
|
if fldbitsize != [-1] * len(fldbitsize):
|
|
|
|
if isinstance(tp, model.StructType) and tp.partial:
|
|
|
|
raise NotImplementedError("%s: using both bitfields and '...;'"
|
|
|
|
% (tp,))
|
|
|
|
tp.packed = self._packed
|
|
|
|
return tp
|
|
|
|
|
|
|
|
def _make_partial(self, tp, nested):
|
|
|
|
if not isinstance(tp, model.StructOrUnion):
|
|
|
|
raise api.CDefError("%s cannot be partial" % (tp,))
|
|
|
|
if not tp.has_c_name() and not nested:
|
|
|
|
raise NotImplementedError("%s is partial but has no C name" %(tp,))
|
|
|
|
tp.partial = True
|
|
|
|
|
|
|
|
def _parse_constant(self, exprnode, partial_length_ok=False):
|
|
|
|
# for now, limited to expressions that are an immediate number
|
|
|
|
# or negative number
|
|
|
|
if isinstance(exprnode, pycparser.c_ast.Constant):
|
|
|
|
return int(exprnode.value, 0)
|
|
|
|
#
|
|
|
|
if (isinstance(exprnode, pycparser.c_ast.UnaryOp) and
|
|
|
|
exprnode.op == '-'):
|
|
|
|
return -self._parse_constant(exprnode.expr)
|
2014-09-05 16:01:36 +00:00
|
|
|
# load previously defined int constant
|
|
|
|
if (isinstance(exprnode, pycparser.c_ast.ID) and
|
|
|
|
exprnode.name in self._int_constants):
|
|
|
|
return self._int_constants[exprnode.name]
|
2013-10-11 17:28:32 +00:00
|
|
|
#
|
|
|
|
if partial_length_ok:
|
|
|
|
if (isinstance(exprnode, pycparser.c_ast.ID) and
|
|
|
|
exprnode.name == '__dotdotdotarray__'):
|
|
|
|
self._partial_length = True
|
|
|
|
return '...'
|
|
|
|
#
|
2014-09-05 16:01:36 +00:00
|
|
|
raise api.FFIError(":%d: unsupported expression: expected a "
|
|
|
|
"simple numeric constant" % exprnode.coord.line)
|
2013-10-11 17:28:32 +00:00
|
|
|
|
|
|
|
def _build_enum_type(self, explicit_name, decls):
|
|
|
|
if decls is not None:
|
|
|
|
enumerators1 = [enum.name for enum in decls.enumerators]
|
|
|
|
enumerators = [s for s in enumerators1
|
|
|
|
if not _r_enum_dotdotdot.match(s)]
|
|
|
|
partial = len(enumerators) < len(enumerators1)
|
|
|
|
enumerators = tuple(enumerators)
|
|
|
|
enumvalues = []
|
|
|
|
nextenumvalue = 0
|
|
|
|
for enum in decls.enumerators[:len(enumerators)]:
|
|
|
|
if enum.value is not None:
|
|
|
|
nextenumvalue = self._parse_constant(enum.value)
|
|
|
|
enumvalues.append(nextenumvalue)
|
2014-09-05 16:01:36 +00:00
|
|
|
self._add_constants(enum.name, nextenumvalue)
|
2013-10-11 17:28:32 +00:00
|
|
|
nextenumvalue += 1
|
|
|
|
enumvalues = tuple(enumvalues)
|
|
|
|
tp = model.EnumType(explicit_name, enumerators, enumvalues)
|
|
|
|
tp.partial = partial
|
|
|
|
else: # opaque enum
|
|
|
|
tp = model.EnumType(explicit_name, (), ())
|
|
|
|
return tp
|
|
|
|
|
|
|
|
def include(self, other):
|
|
|
|
for name, tp in other._declarations.items():
|
|
|
|
kind = name.split(' ', 1)[0]
|
|
|
|
if kind in ('typedef', 'struct', 'union', 'enum'):
|
|
|
|
self._declare(name, tp)
|
2014-09-05 16:01:36 +00:00
|
|
|
for k, v in other._int_constants.items():
|
|
|
|
self._add_constants(k, v)
|