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cparser.py
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cparser.py
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# PyCParser main file
# by Albert Zeyer, 2011
# code under LGPL
import ctypes, _ctypes
SpaceChars = " \t"
LowercaseLetterChars = "abcdefghijklmnopqrstuvwxyz"
LetterChars = LowercaseLetterChars + LowercaseLetterChars.upper()
NumberChars = "0123456789"
OpChars = "&|=!+-*/%<>^~?:,."
LongOps = map(lambda c: c+"=", "&|=+-*/%<>^~") + ["--","++","->"]
OpeningBrackets = "[({"
ClosingBrackets = "})]"
def simple_escape_char(c):
if c == "n": return "\n"
elif c == "t": return "\t"
else: return c
def escape_cstr(s):
return s.replace('"', '\\"')
def parse_macro_def_rightside(stateStruct, argnames, input):
assert argnames is not None
assert input is not None
if stateStruct is None:
class Dummy:
def error(self, s): pass
stateStruct = Dummy()
def f(*args):
args = dict(map(lambda i: (argnames[i], args[i]), range(len(argnames))))
ret = ""
state = 0
lastidentifier = ""
for c in input:
if state == 0:
if c in SpaceChars: ret += c
elif c in LetterChars + "_":
state = 1
lastidentifier = c
elif c in NumberChars:
state = 2
ret += c
elif c == '"':
state = 4
ret += c
elif c == "#": state = 6
else: ret += c
elif state == 1: # identifier
if c in LetterChars + NumberChars + "_":
lastidentifier += c
else:
if lastidentifier in args:
ret += args[lastidentifier]
else:
ret += lastidentifier
lastidentifier = ""
ret += c
state = 0
elif state == 2: # number
ret += c
if c in NumberChars: pass
elif c == "x": state = 3
elif c in LetterChars + "_": pass # even if invalid, stay in this state
else: state = 0
elif state == 3: # hex number
ret += c
if c in NumberChars + LetterChars + "_": pass # also ignore invalids
else: state = 0
elif state == 4: # str
ret += c
if c == "\\": state = 5
elif c == '"': state = 0
else: pass
elif state == 5: # escape in str
state = 4
ret += c
elif state == 6: # after "#"
if c in SpaceChars + LetterChars + "_":
lastidentifier = c.strip()
state = 7
elif c == "#":
ret = ret.rstrip()
state = 8
else:
# unexpected, just recover
stateStruct.error("unfold macro: unexpected char '" + c + "' after #")
state = 0
elif state == 7: # after single "#" with identifier
if c in LetterChars + NumberChars + "_":
lastidentifier += c
else:
if lastidentifier not in args:
stateStruct.error("unfold macro: cannot stringify " + lastidentifier + ": not found")
else:
ret += '"' + escape_cstr(args[lastidentifier]) + '"'
lastidentifier = ""
state = 0
ret += c
elif state == 8: # after "##"
if c in SpaceChars: pass
else:
lastidentifier = c
state = 1
if state == 1:
if lastidentifier in args:
ret += args[lastidentifier]
else:
ret += lastidentifier
return ret
return f
class Macro:
def __init__(self, state=None, macroname=None, args=None, rightside=None):
self.name = macroname
self.args = args if (args is not None) else ()
self.rightside = rightside if (rightside is not None) else ""
self.defPos = state.curPosAsStr() if state else "<unknown>"
def __str__(self):
return "(" + ", ".join(self.args) + ") -> " + self.rightside
def __repr__(self):
return "<Macro: " + str(self) + ">"
def eval(self, state, args):
if len(args) != len(self.args): raise TypeError, "invalid number of args (" + str(args) + ") for " + repr(self)
func = parse_macro_def_rightside(state, self.args, self.rightside)
return func(*args)
def __call__(self, *args):
return self.eval(None, args)
def __eq__(self, other):
if not isinstance(other, Macro): return False
return self.args == other.args and self.rightside == other.rightside
def __ne__(self, other): return not self == other
def getConstValue(self, stateStruct):
assert len(self.args) == 0
preprocessed = stateStruct.preprocess(self.rightside, None, repr(self))
tokens = cpre2_parse(stateStruct, preprocessed)
valueStmnt = CStatement()
input_iter = iter(tokens)
for token in input_iter:
if isinstance(token, COpeningBracket):
valueStmnt._cpre3_parse_brackets(stateStruct, token, input_iter)
else:
valueStmnt._cpre3_handle_token(stateStruct, token)
valueStmnt.finalize(stateStruct)
return valueStmnt.getConstValue(stateStruct)
# either some basic type, another typedef or some complex like CStruct/CUnion/...
class CType:
def __init__(self, **kwargs):
for k,v in kwargs.iteritems():
setattr(self, k, v)
def __repr__(self):
return self.__class__.__name__ + " " + str(self.__dict__)
def __eq__(self, other):
if not hasattr(other, "__class__"): return False
return self.__class__ is other.__class__ and self.__dict__ == other.__dict__
def __ne__(self, other): return not self == other
def __hash__(self): return hash(self.__class__) + 31 * hash(tuple(sorted(self.__dict__.iteritems())))
def getCType(self, stateStruct):
raise NotImplementedError, str(self) + " getCType is not implemented"
class CUnknownType(CType): pass
class CVoidType(CType):
def __repr__(self): return "void"
def getCType(self, stateStruct): return None
class CPointerType(CType):
def __init__(self, ptr): self.pointerOf = ptr
def getCType(self, stateStruct):
try:
t = getCType(self.pointerOf, stateStruct)
ptrType = ctypes.POINTER(t)
return ptrType
except Exception, e:
stateStruct.error(str(self) + ": error getting type (" + str(e) + "), falling back to void-ptr")
return ctypes.c_void_p
class CBuiltinType(CType):
def __init__(self, builtinType): self.builtinType = builtinType
def getCType(self, stateStruct): return getCType(self.builtinType, stateStruct)
class CStdIntType(CType):
def __init__(self, name): self.name = name
def getCType(self, stateStruct): return stateStruct.StdIntTypes[self.name]
class CTypedefType(CType):
def __init__(self, name): self.name = name
def getCType(self, stateStruct):
return getCType(stateStruct.typedefs[self.name], stateStruct)
def getCType(t, stateStruct):
assert not isinstance(t, CUnknownType)
try:
if issubclass(t, _ctypes._SimpleCData): return t
except: pass # e.g. typeerror or so
if isinstance(t, _CBaseWithOptBody):
return t.getCType(stateStruct)
if isinstance(t, CType):
return t.getCType(stateStruct)
raise Exception, str(t) + " cannot be converted to a C type"
class State:
EmptyMacro = Macro(None, None, (), "")
CBuiltinTypes = {
("void",): CVoidType(),
("void", "*"): ctypes.c_void_p,
("char",): ctypes.c_char,
("unsigned", "char"): ctypes.c_ubyte,
("short",): ctypes.c_short,
("unsigned", "short"): ctypes.c_ushort,
("int",): ctypes.c_int,
("unsigned", "int"): ctypes.c_uint,
("unsigned",): ctypes.c_uint,
("long",): ctypes.c_long,
("unsigned", "long"): ctypes.c_ulong,
("long", "long"): ctypes.c_longlong,
("unsigned", "long", "long"): ctypes.c_ulonglong,
("float",): ctypes.c_float,
("double",): ctypes.c_double,
("long", "double"): ctypes.c_longdouble,
}
StdIntTypes = {
"uint8_t": ctypes.c_uint8,
"uint16_t": ctypes.c_uint16,
"uint32_t": ctypes.c_uint32,
"uint64_t": ctypes.c_uint64,
"int8_t": ctypes.c_int8,
"int16_t": ctypes.c_int16,
"int32_t": ctypes.c_int32,
"int64_t": ctypes.c_int64,
"byte": ctypes.c_byte,
"wchar_t": ctypes.c_wchar,
"size_t": ctypes.c_size_t,
"FILE": ctypes.c_int, # NOTE: not really correct but shouldn't matter unless we directly access it
}
Attribs = [
"const",
"extern",
"static",
"register",
"__inline__",
]
def __init__(self):
self.parent = None
self.macros = {} # name -> Macro
self.typedefs = {} # name -> type
self.structs = {} # name -> CStruct
self.unions = {} # name -> CUnion
self.enums = {} # name -> CEnum
self.funcs = {} # name -> CFunc
self.vars = {} # name -> CVarDecl
self.enumconsts = {} # name -> CEnumConst
self.contentlist = []
self._preprocessIfLevels = []
self._preprocessIgnoreCurrent = False
# 0->didnt got true yet, 1->in true part, 2->after true part. and that as a stack
self._preprocessIncludeLevel = []
self._errors = []
def autoSetupSystemMacros(self):
import sys
self.macros["__GNUC__"] = self.EmptyMacro # most headers just behave more sane with this :)
if sys.platform == "darwin":
self.macros["__APPLE__"] = self.EmptyMacro
self.macros["__MACH__"] = self.EmptyMacro
self.macros["__MACOSX__"] = self.EmptyMacro
self.macros["i386"] = self.EmptyMacro
self.macros["MAC_OS_X_VERSION_MIN_REQUIRED"] = Macro(rightside="1030")
def incIncludeLineChar(self, fullfilename=None, inc=None, line=None, char=None, charMod=None):
CharStartIndex = 0
LineStartIndex = 1
if inc is not None:
self._preprocessIncludeLevel += [[fullfilename, inc, LineStartIndex, CharStartIndex]]
if len(self._preprocessIncludeLevel) == 0:
self._preprocessIncludeLevel += [[None, "<input>", LineStartIndex, CharStartIndex]]
if line is not None:
self._preprocessIncludeLevel[-1][2] += line
self._preprocessIncludeLevel[-1][3] = CharStartIndex
if char is not None:
c = self._preprocessIncludeLevel[-1][3]
c += char
if charMod is not None:
c = c - (c - CharStartIndex) % charMod + CharStartIndex
self._preprocessIncludeLevel[-1][3] = c
def curPosAsStr(self):
if len(self._preprocessIncludeLevel) == 0: return "<out-of-scope>"
l = self._preprocessIncludeLevel[-1]
return ":".join([l[1], str(l[2]), str(l[3])])
def error(self, s):
self._errors += [self.curPosAsStr() + ": " + s]
def findIncludeFullFilename(self, filename, local):
if local:
dir = ""
if filename[0] != "/":
if self._preprocessIncludeLevel and self._preprocessIncludeLevel[-1][0]:
import os.path
dir = os.path.dirname(self._preprocessIncludeLevel[-1][0])
if not dir: dir = "."
dir += "/"
else:
dir = ""
fullfilename = dir + filename
return fullfilename
def readGlobalInclude(self, filename):
if filename == "inttypes.h": return "", None # we define those types as builtin-types
elif filename == "stdint.h": return "", None
else:
self.error("no handler for global include-file '" + filename + "'")
return "", None
def preprocess_file(self, filename, local):
if local:
fullfilename = self.findIncludeFullFilename(filename, local)
try:
import codecs
f = codecs.open(fullfilename, "r", "utf-8")
except Exception, e:
self.error("cannot open include-file '" + filename + "': " + str(e))
return
def reader():
while True:
c = f.read(1)
if len(c) == 0: break
yield c
reader = reader()
else:
reader, fullfilename = self.readGlobalInclude(filename)
for c in self.preprocess(reader, fullfilename, filename):
yield c
def preprocess(self, reader, fullfilename, filename):
self.incIncludeLineChar(fullfilename=fullfilename, inc=filename)
for c in cpreprocess_parse(self, reader):
yield c
self._preprocessIncludeLevel = self._preprocessIncludeLevel[:-1]
def getCWrapper(self, clib):
class CWrapper(object):
stateStruct = self
dll = clib
def __getattribute__(self, attrib):
if attrib in ("_cache","__dict__","__class__"):
return object.__getattribute__(self, attrib)
if not "_cache" in self.__dict__: self._cache = {}
cache = self._cache
if attrib in cache: return cache[attrib]
stateStruct = self.__class__.stateStruct
if attrib in stateStruct.macros and len(stateStruct.macros[attrib].args) == 0:
t = stateStruct.macros[attrib].getConstValue(stateStruct)
elif attrib in stateStruct.typedefs:
t = stateStruct.typedefs[attrib].getCType(stateStruct)
elif attrib in stateStruct.enumconsts:
t = stateStruct.enumconsts[attrib].value
elif attrib in stateStruct.funcs:
t = stateStruct.funcs[attrib].getCType(stateStruct)((attrib, clib))
else:
raise AttributeError, attrib + " not found in " + str(stateStruct)
cache[attrib] = t
return t
def iterAllAttribs():
for attrib in self.macros:
if len(self.macros[attrib].args) > 0: continue
yield attrib
for attrib in self.typedefs:
yield attrib
for attrib in self.enumconsts:
yield attrib
for attrib in self.funcs:
yield attrib
for attrib in iterAllAttribs():
if not hasattr(CWrapper, attrib):
setattr(CWrapper, attrib, None)
wrapper = CWrapper()
return wrapper
def is_valid_defname(defname):
if not defname: return False
gotValidPrefix = False
for c in defname:
if c in LetterChars + "_":
gotValidPrefix = True
elif c in NumberChars:
if not gotValidPrefix: return False
else:
return False
return True
def cpreprocess_evaluate_ifdef(state, arg):
arg = arg.strip()
if not is_valid_defname(arg):
state.error("preprocessor: '" + arg + "' is not a valid macro name")
return False
return arg in state.macros
def cpreprocess_evaluate_single(state, arg):
if arg == "": return None
try: return int(arg) # is integer?
except: pass
if len(arg) >= 2 and arg[0] == '"' and arg[-1] == '"': return arg[1:-1] # is string?
if not is_valid_defname(arg):
state.error("preprocessor eval single: '" + arg + "' is not a valid macro name")
return 0
if arg not in state.macros:
state.error("preprocessor eval single: '" + arg + "' is unknown")
return 0
try:
resolved = state.macros[arg]()
except Exception, e:
state.error("preprocessor eval single error on '" + arg + "': " + str(e))
return 0
return cpreprocess_evaluate_cond(state, resolved)
def cpreprocess_evaluate_cond(stateStruct, condstr):
state = 0
bracketLevel = 0
substr = ""
laststr = ""
lasteval = None
op = None
prefixOp = None
opstr = ""
args = []
for c in condstr:
breakLoop = False
while not breakLoop:
breakLoop = True
if state == 0:
if c == "(":
if laststr == "":
state = 1
bracketLevel = 1
else:
state = 10
breakLoop = False
elif c == ")":
stateStruct.error("preprocessor: runaway ')'")
return
elif c in SpaceChars:
if laststr == "defined": state = 5
elif laststr != "": state = 10
else: pass
elif c in OpChars:
state = 10
breakLoop = False
elif c == '"':
if laststr == "":
state = 20
else:
stateStruct.error("preprocessor: '\"' not expected")
return
else:
laststr += c
elif state == 1: # in bracket
if c == "(":
bracketLevel += 1
if c == ")":
bracketLevel -= 1
if bracketLevel == 0:
neweval = cpreprocess_evaluate_cond(stateStruct, substr)
state = 18
if prefixOp is not None:
neweval = prefixOp(neweval)
prefixOp = None
if op is not None: lasteval = op(lasteval, neweval)
else: lasteval = neweval
substr = ""
else: # bracketLevel > 0
substr += c
elif c == '"':
state = 2
substr += c
else:
substr += c
elif state == 2: # in str in bracket
substr += c
if c == "\\": state = 3
elif c == '"': state = 1
else: pass
elif state == 3: # in escape in str in bracket
substr += c
state = 2
elif state == 5: # after "defined" without brackets (yet)
if c in SpaceChars: pass
elif c == "(":
state = 10
breakLoop = False
elif c == ")":
stateStruct.error("preprocessor eval: 'defined' invalid in '" + condstr + "'")
return
else:
laststr = c
state = 6
elif state == 6: # chars after "defined"
if c in LetterChars + "_" + NumberChars:
laststr += c
else:
macroname = laststr
if not is_valid_defname(macroname):
stateStruct.error("preprocessor eval defined-check: '" + macroname + "' is not a valid macro name")
return
neweval = macroname in stateStruct.macros
if prefixOp is not None:
neweval = prefixOp(neweval)
prefixOp = None
oldlast = lasteval
if op is not None: lasteval = op(lasteval, neweval)
else: lasteval = neweval
opstr = ""
laststr = ""
state = 18
breakLoop = False
elif state == 10: # after identifier
if c in SpaceChars: pass
elif c in OpChars:
if laststr != "":
neweval = cpreprocess_evaluate_single(stateStruct, laststr)
if prefixOp is not None:
neweval = prefixOp(neweval)
prefixOp = None
if op is not None: lasteval = op(lasteval, neweval)
else: lasteval = neweval
laststr = ""
opstr = ""
state = 18
breakLoop = False
elif c == "(":
state = 11
bracketLevel = 1
args = []
else:
stateStruct.error("preprocessor eval: '" + c + "' not expected after '" + laststr + "' in state 10 with '" + condstr + "'")
return
elif state == 11: # after "(" after identifier
if c == "(":
if len(args) == 0: args = [""]
args[-1] += c
bracketLevel += 1
state = 12
elif c == ")":
macroname = laststr
if macroname == "defined":
if len(args) != 1:
stateStruct.error("preprocessor eval defined-check args invalid: " + str(args))
return
else:
macroname = args[0]
if not is_valid_defname(macroname):
stateStruct.error("preprocessor eval defined-check: '" + macroname + "' is not a valid macro name")
return
neweval = macroname in stateStruct.macros
else:
if not is_valid_defname(macroname):
stateStruct.error("preprocessor eval call: '" + macroname + "' is not a valid macro name")
return
if arg not in stateStruct.macros:
stateStruct.error("preprocessor eval call: '" + macroname + "' is unknown")
return
macro = stateStruct.macros[macroname]
try:
resolved = macro.eval(stateStruct, args)
except Exception, e:
stateStruct.error("preprocessor eval call on '" + macroname + "': error " + str(e))
return
neweval = cpreprocess_evaluate_cond(stateStruct, resolved)
if prefixOp is not None:
neweval = prefixOp(neweval)
prefixOp = None
oldlast = lasteval
if op is not None: lasteval = op(lasteval, neweval)
else: lasteval = neweval
#print "after ):", laststr, args, neweval, op.func_code.co_firstlineno if op else "no-op", oldlast, "->", lasteval
laststr = ""
opstr = ""
state = 18
elif c == '"':
if len(args) == 0: args = [""]
args[-1] += c
state = 13
elif c == ",": args += [""]
else:
if len(args) == 0: args = [""]
args[-1] += c
elif state == 12: # in additional "(" after "(" after identifier
args[-1] += c
if c == "(": bracketLevel += 1
elif c == ")":
bracketLevel -= 1
if bracketLevel == 1: state = 11
elif c == '"': state = 13
else: pass
elif state == 13: # in str after "(" after identifier
args[-1] += c
if c == "\\": state = 14
elif c == '"':
if bracketLevel > 1: state = 12
else: state = 11
else: pass
elif state == 14: # in escape in str after "(" after identifier
args[-1] += c
state = 13
elif state == 18: # op after identifier/expression
if c in OpChars: opstr += c
else:
if opstr == "":
if c in SpaceChars: pass
else:
stateStruct.error("preprocessor eval: expected op but got '" + c + "' in '" + condstr + "' in state 18")
return
else:
if opstr == "!=": op = lambda x,y: x != y
elif opstr == "==": op = lambda x,y: x == y
elif opstr == "<=": op = lambda x,y: x <= y
elif opstr == ">=": op = lambda x,y: x >= y
elif opstr == "<": op = lambda x,y: x < y
elif opstr == ">": op = lambda x,y: x > y
elif opstr == "+": op = lambda x,y: x + y
elif opstr == "-": op = lambda x,y: x - y
elif opstr == "*": op = lambda x,y: x * y
elif opstr == "/": op = lambda x,y: x / y
elif opstr == "%": op = lambda x,y: x % y
elif opstr == "&": op = lambda x,y: x & y
elif opstr == "|": op = lambda x,y: x | y
elif opstr == "&&":
op = lambda x,y: x and y
# short path check
if not lasteval: return lasteval
elif opstr == "||":
op = lambda x,y: x or y
# short path check
if lasteval: return lasteval
elif opstr == "!":
newprefixop = lambda x: not x
if prefixOp: prefixOp = lambda x: prefixOp(newprefixop(x))
else: prefixOp = newprefixop
else:
stateStruct.error("invalid op '" + opstr + "' with '" + c + "' following in '" + condstr + "'")
return
opstr = ""
laststr = ""
state = 0
breakLoop = False
elif state == 20: # in str
if c == "\\": state = 21
elif c == '"':
state = 0
neweval = laststr
laststr = ""
if prefixOp is not None:
neweval = prefixOp(neweval)
prefixOp = None
if op is not None: lasteval = op(lasteval, neweval)
else: lasteval = neweval
else: laststr += c
elif state == 21: # in escape in str
laststr += simple_escape_char(c)
state = 20
else:
stateStruct.error("internal error in preprocessor evaluation: state " + str(state))
return
if state in (0,10):
if laststr != "":
neweval = cpreprocess_evaluate_single(stateStruct, laststr)
if prefixOp is not None:
neweval = prefixOp(neweval)
prefixOp = None
if op is not None: lasteval = op(lasteval, neweval)
else: lasteval = neweval
elif state == 6:
macroname = laststr
if not is_valid_defname(macroname):
stateStruct.error("preprocessor eval defined-check: '" + macroname + "' is not a valid macro name")
return
neweval = macroname in stateStruct.macros
if prefixOp is not None:
neweval = prefixOp(neweval)
prefixOp = None
oldlast = lasteval
if op is not None: lasteval = op(lasteval, neweval)
else: lasteval = neweval
elif state == 18: # expected op
if opstr != "":
stateStruct.error("preprocessor eval: unfinished op: '" + opstr + "'")
else: pass
else:
stateStruct.error("preprocessor eval: invalid argument: '" + condstr + "'. unfinished state " + str(state))
#print "eval:", condstr, "->", lasteval
return lasteval
def cpreprocess_handle_include(state, arg):
arg = arg.strip()
if len(arg) < 2:
state.error("invalid include argument: '" + arg + "'")
return
if arg[0] == '"' and arg[-1] == '"':
local = True
filename = arg[1:-1]
elif arg[0] == "<" and arg[-1] == ">":
local = False
filename = arg[1:-1]
else:
state.error("invalid include argument: '" + arg + "'")
return
for c in state.preprocess_file(filename=filename, local=local): yield c
def cpreprocess_handle_def(stateStruct, arg):
state = 0
macroname = ""
args = []
rightside = ""
for c in arg:
if state == 0:
if c in SpaceChars:
if macroname != "": state = 3
elif c == "(": state = 2
else: macroname += c
elif state == 2: # after "("
if c in SpaceChars: pass
elif c == ",": args += [""]
elif c == ")": state = 3
else:
if not args: args = [""]
args[-1] += c
elif state == 3: # rightside
rightside += c
if not is_valid_defname(macroname):
stateStruct.error("preprocessor define: '" + macroname + "' is not a valid macro name")
return
if macroname in stateStruct.macros:
stateStruct.error("preprocessor define: '" + macroname + "' already defined." +
" previously defined at " + stateStruct.macros[macroname].defPos)
# pass through to use new definition
macro = Macro(stateStruct, macroname, args, rightside)
stateStruct.macros[macroname] = macro
return macro
def cpreprocess_handle_undef(state, arg):
arg = arg.strip()
if not is_valid_defname(arg):
state.error("preprocessor: '" + arg + "' is not a valid macro name")
return
if not arg in state.macros:
state.error("preprocessor: macro " + arg + " is not defined")
return
state.macros.pop(arg)
def handle_cpreprocess_cmd(state, cmd, arg):
#if not state._preprocessIgnoreCurrent:
# print "cmd", cmd, arg
if cmd == "ifdef":
state._preprocessIfLevels += [0]
if any(map(lambda x: x != 1, state._preprocessIfLevels[:-1])): return # we don't really care
check = cpreprocess_evaluate_ifdef(state, arg)
if check: state._preprocessIfLevels[-1] = 1
elif cmd == "ifndef":
state._preprocessIfLevels += [0]
if any(map(lambda x: x != 1, state._preprocessIfLevels[:-1])): return # we don't really care
check = not cpreprocess_evaluate_ifdef(state, arg)
if check: state._preprocessIfLevels[-1] = 1
elif cmd == "if":
state._preprocessIfLevels += [0]
if any(map(lambda x: x != 1, state._preprocessIfLevels[:-1])): return # we don't really care
check = cpreprocess_evaluate_cond(state, arg)
if check: state._preprocessIfLevels[-1] = 1
elif cmd == "elif":
if any(map(lambda x: x != 1, state._preprocessIfLevels[:-1])): return # we don't really care
if len(state._preprocessIfLevels) == 0:
state.error("preprocessor: elif without if")
return
if state._preprocessIfLevels[-1] >= 1:
state._preprocessIfLevels[-1] = 2 # we already had True
else:
check = cpreprocess_evaluate_cond(state, arg)
if check: state._preprocessIfLevels[-1] = 1
elif cmd == "else":
if any(map(lambda x: x != 1, state._preprocessIfLevels[:-1])): return # we don't really care
if len(state._preprocessIfLevels) == 0:
state.error("preprocessor: else without if")
return
if state._preprocessIfLevels[-1] >= 1:
state._preprocessIfLevels[-1] = 2 # we already had True
else:
state._preprocessIfLevels[-1] = 1
elif cmd == "endif":
if len(state._preprocessIfLevels) == 0:
state.error("preprocessor: endif without if")
return
state._preprocessIfLevels = state._preprocessIfLevels[0:-1]
elif cmd == "include":
if state._preprocessIgnoreCurrent: return
for c in cpreprocess_handle_include(state, arg): yield c
elif cmd == "define":
if state._preprocessIgnoreCurrent: return
cpreprocess_handle_def(state, arg)
elif cmd == "undef":
if state._preprocessIgnoreCurrent: return
cpreprocess_handle_undef(state, arg)
elif cmd == "pragma":
pass # ignore at all right now
elif cmd == "error":
if state._preprocessIgnoreCurrent: return # we don't really care
state.error("preprocessor error command: " + arg)
elif cmd == "warning":
if state._preprocessIgnoreCurrent: return # we don't really care
state.error("preprocessor warning command: " + arg)
else:
if state._preprocessIgnoreCurrent: return # we don't really care
state.error("preprocessor command " + cmd + " unknown")
state._preprocessIgnoreCurrent = any(map(lambda x: x != 1, state._preprocessIfLevels))
def cpreprocess_parse(stateStruct, input):
cmd = ""
arg = ""
state = 0
statebeforecomment = None
for c in input:
breakLoop = False
while not breakLoop:
breakLoop = True
if state == 0:
if c == "#":
cmd = ""
arg = None
state = 1
elif c == "/":
statebeforecomment = 0
state = 20
elif c == '"':
if not stateStruct._preprocessIgnoreCurrent: yield c
state = 10
elif c == "'":
if not stateStruct._preprocessIgnoreCurrent: yield c
state = 12
else:
if not stateStruct._preprocessIgnoreCurrent: yield c
elif state == 1: # start of preprocessor command
if c in SpaceChars: pass
elif c == "\n": state = 0
else:
cmd = c
state = 2
elif state == 2: # in the middle of the command
if c in SpaceChars:
if arg is None: arg = ""
else: arg += c
elif c == "(":
if arg is None: arg = c
else: arg += c
elif c == "/":
state = 20
statebeforecomment = 2
elif c == "\\": state = 5 # escape next
elif c == "\n":
for c in handle_cpreprocess_cmd(stateStruct, cmd, arg): yield c
state = 0
else:
if arg is None: cmd += c
else: arg += c
elif state == 5: # after escape in arg in command
if c == "\n": state = 2
else: pass # ignore everything, wait for newline
elif state == 10: # after '"'
if not stateStruct._preprocessIgnoreCurrent: yield c
if c == "\\": state = 11
elif c == '"': state = 0
else: pass
elif state == 11: # escape in "str
if not stateStruct._preprocessIgnoreCurrent: yield c
state = 10
elif state == 12: # after "'"
if not stateStruct._preprocessIgnoreCurrent: yield c
if c == "\\": state = 13
elif c == "'": state = 0
else: pass
elif state == 13: # escape in 'str
if not stateStruct._preprocessIgnoreCurrent: yield c
state = 12
elif state == 20: # after "/", possible start of comment
if c == "*": state = 21 # C-style comment
elif c == "/": state = 25 # C++-style comment
else:
state = statebeforecomment
statebeforecomment = None
if state == 0:
if not stateStruct._preprocessIgnoreCurrent: yield "/"
elif state == 2:
if arg is None: arg = ""
arg += "/"
breakLoop = False
else:
stateStruct.error("preproc parse: internal error after possible comment. didn't expect state " + str(state))
state = 0 # best we can do
elif state == 21: # C-style comment
if c == "*": state = 22
else: pass
elif state == 22: # C-style comment after "*"
if c == "/":
state = statebeforecomment
statebeforecomment = None
elif c == "*": pass
else: state = 21
elif state == 25: # C++-style comment
if c == "\n":
state = statebeforecomment
statebeforecomment = None
else: pass
else:
stateStruct.error("internal error: invalid state " + str(state))
state = 0 # reset. it's the best we can do
if c == "\n": stateStruct.incIncludeLineChar(line=1)
elif c == "\t": stateStruct.incIncludeLineChar(char=4, charMod=4)
else: stateStruct.incIncludeLineChar(char=1)
class _CBase:
def __init__(self, data=None, rawstr=None, **kwargs):
self.content = data
self.rawstr = rawstr
for k,v in kwargs.iteritems():
setattr(self, k, v)
def __repr__(self):
if self.content is None: return "<" + self.__class__.__name__ + ">"
return "<" + self.__class__.__name__ + " " + str(self.content) + ">"
def __eq__(self, other):
return self.__class__ is other.__class__ and self.content == other.content
def asCCode(self): return self.content
class CStr(_CBase):
def __repr__(self): return "<" + self.__class__.__name__ + " " + repr(self.content) + ">"
def asCCode(self): return '"' + escape_cstr(self.content) + '"'
class CChar(_CBase):
def asCCode(self): return "'" + escape_cstr(self.content) + '"'
class CNumber(_CBase):
def asCCode(self): return self.rawstr
class CIdentifier(_CBase): pass
class COp(_CBase): pass
class CSemicolon(_CBase):
def asCCode(self): return ";"
class COpeningBracket(_CBase): pass
class CClosingBracket(_CBase): pass
def cpre2_parse_number(stateStruct, s):
if len(s) > 1 and s[0] == "0" and s[1] in NumberChars:
try:
return long(s, 8)
except Exception, e:
stateStruct.error("cpre2_parse_number: " + s + " looks like octal but got error " + str(e))
return 0
if len(s) > 1 and s[0] == "0" and s[1] in "xX":
try:
return long(s, 16)
except Exception, e:
stateStruct.error("cpre2_parse_number: " + s + " looks like hex but got error " + str(e))
return 0
try:
s = s.rstrip("ULul")
return long(s)
except Exception, e:
stateStruct.error("cpre2_parse_number: " + s + " cannot be parsed: " + str(e))
return 0