def _parseAttributes(self):
index = 0
exploded = self.attributes.split(',')
# attributes defined by a single letter.
__singleLetters = {
'C': ('accessMethod', 'copy'),
'&': ('accessMethod', 'retain'),
'N': ('atomic', False),
'D': ('synthesizedIvar', ''),
'P': ('gcStrength', '__strong'),
'W': ('gcStrength', '__weak'),
'G': ('hasGetter', True),
'S': ('hasSetter', True),
'R': ('readOnly', True)
}
# attributes defined by a letter followed by some strings.
__multiLetters = {
'G': 'getter',
'S': 'setter',
'V': 'synthesizedIvar'
}
buffer = []
for string in exploded:
if buffer:
buffer.append(string)
else:
typ = string[0]
if typ in __multiLetters:
setattr(self, __multiLetters[typ], string[1:])
if typ in __singleLetters:
(attr, val) = __singleLetters[typ]
setattr(self, attr, val)
if typ == 'T':
buffer = [string[1:]]
if buffer:
joinedBuffer = ','.join(buffer)
joinedBufferLength = len(joinedBuffer)
if balancedSubstring(joinedBuffer) <= joinedBufferLength:
self.encoding = joinedBuffer
buffer = []
def _parseAttributes(self):
index = 0
exploded = self.attributes.split(',')
# attributes defined by a single letter.
__singleLetters = {
'C': ('accessMethod', 'copy'),
'&': ('accessMethod', 'retain'),
'N': ('atomic', False),
'D': ('synthesizedIvar', ''),
'P': ('gcStrength', '__strong'),
'W': ('gcStrength', '__weak'),
'G': ('hasGetter', True),
'S': ('hasSetter', True),
'R': ('readOnly', True)
}
# attributes defined by a letter followed by some strings.
__multiLetters = {'G': 'getter', 'S': 'setter', 'V': 'synthesizedIvar'}
buffer = []
for string in exploded:
if buffer:
buffer.append(string)
else:
typ = string[0]
if typ in __multiLetters:
setattr(self, __multiLetters[typ], string[1:])
if typ in __singleLetters:
(attr, val) = __singleLetters[typ]
setattr(self, attr, val)
if typ == 'T':
buffer = [string[1:]]
if buffer:
joinedBuffer = ','.join(buffer)
joinedBufferLength = len(joinedBuffer)
if balancedSubstring(joinedBuffer) <= joinedBufferLength:
self.encoding = joinedBuffer
buffer = []
def parse(encoding, start=0, end=None, hasMemberName=True):
"""
Parse an encoded type string into an Objective-C type.
If you supply *start* and *end*, only the substring ``encoding[start:end]``
will be parsed.
Returns a tuple of :class:`~objctype2.types.Type` and the next index to
parse. If nothing can be parsed, the type will become ``None``.
Example::
from objctype2.parser import parse
from balanced_substring import numericSubstring
typeinfo = 'c24@0:4@8@12{_NSRange=II}16'
index = 0
while True:
(type_, index) = parse(typeinfo, index)
if type_ is None:
break
(stackIndex, index) = numericSubstring(typeinfo, index)
print (type_, '@', stackIndex)
# prints:
# Primitive('c') @ 24
# ObjCType() @ 0
# Primitive(':') @ 4
# ObjCType() @ 8
# ObjCType() @ 12
# Struct('_NSRange').append(Primitive('I')).append(Primitive('I')).freeze() @ 16
"""
if end is None:
end = len(encoding)
if start >= end:
return (None, end)
firstChar = encoding[start]
start += 1
# primitives
if firstChar in _primitive1c:
return (Primitive(firstChar), start)
# unary, or function pointer (^ and ^?)
elif firstChar in _modifier1c:
if start >= end or encoding[start] in "]})":
return (Primitive(FUNCTION_POINTER), start)
elif encoding[start] == '?':
return (Primitive(FUNCTION_POINTER), start + 1)
else:
(baseType, newStart) = parse(encoding, start, end, hasMemberName)
return (Unary(firstChar, baseType), newStart)
# char pointer
elif firstChar == '*':
return (Unary(POINTER, Primitive(CHAR)), start)
# bitfield
elif firstChar == 'b':
(bitlen, newStart) = numericSubstring(encoding, start)
return (Bitfield(bitlen), newStart)
# array
elif firstChar == '[':
(length, newStart) = numericSubstring(encoding, start)
(baseType, newNewStart) = parse(encoding, newStart, end, hasMemberName)
assert encoding[newNewStart] == ']'
return (Array(length, baseType), newNewStart + 1)
# objective-C type, or blocks
elif firstChar == '@':
if start >= end or encoding[start] not in '?"':
return (ObjCType(), start)
elif encoding[start] == '?':
return (Primitive(BLOCK), start + 1)
else:
# "foo"@"bar"@
# "foo"@"NSObject""bar"@
# "foo"@"bar"@"NSObject"
m = _objcRe(encoding, start)
if not m or (hasMemberName and m.end() < end
and encoding[m.end() - 1] not in '"]})'):
return (ObjCType(), start)
(name, protos) = m.groups()
if protos:
protos = protos.split(',')
return (ObjCType(name, protos), m.end())
# struct or union
elif firstChar in '{(':
isUnion = firstChar == '('
newStart = start
while encoding[newStart] not in '=)}':
newStart = balancedSubstring(encoding, newStart)
name = encoding[start:newStart]
if encoding[newStart] == '=':
newStart += 1
stru = Struct(name, isUnion)
while newStart <= end and encoding[newStart] not in ')}':
hasMemberName = encoding[newStart] == '"'
if hasMemberName:
m = _struMemRe(encoding, newStart)
memberName = m.group(1)
newStart = m.end()
else:
memberName = None
(baseType, newNewStart) = parse(encoding, newStart, end,
hasMemberName)
stru.append(baseType, memberName)
newStart = newNewStart
stru.freeze()
return (stru, newStart + 1)
def parse(encoding, start=0, end=None, hasMemberName=True):
"""
Parse an encoded type string into an Objective-C type.
If you supply *start* and *end*, only the substring ``encoding[start:end]``
will be parsed.
Returns a tuple of :class:`~objctype2.types.Type` and the next index to
parse. If nothing can be parsed, the type will become ``None``.
Example::
from objctype2.parser import parse
from balanced_substring import numericSubstring
typeinfo = 'c24@0:4@8@12{_NSRange=II}16'
index = 0
while True:
(type_, index) = parse(typeinfo, index)
if type_ is None:
break
(stackIndex, index) = numericSubstring(typeinfo, index)
print (type_, '@', stackIndex)
# prints:
# Primitive('c') @ 24
# ObjCType() @ 0
# Primitive(':') @ 4
# ObjCType() @ 8
# ObjCType() @ 12
# Struct('_NSRange').append(Primitive('I')).append(Primitive('I')).freeze() @ 16
"""
if end is None:
end = len(encoding)
if start >= end:
return (None, end)
firstChar = encoding[start]
start += 1
# primitives
if firstChar in _primitive1c:
return (Primitive(firstChar), start)
# unary, or function pointer (^ and ^?)
elif firstChar in _modifier1c:
if start >= end or encoding[start] in "]})":
return (Primitive(FUNCTION_POINTER), start)
elif encoding[start] == '?':
return (Primitive(FUNCTION_POINTER), start+1)
else:
(baseType, newStart) = parse(encoding, start, end, hasMemberName)
return (Unary(firstChar, baseType), newStart)
# char pointer
elif firstChar == '*':
return (Unary(POINTER, Primitive(CHAR)), start)
# bitfield
elif firstChar == 'b':
(bitlen, newStart) = numericSubstring(encoding, start)
return (Bitfield(bitlen), newStart)
# array
elif firstChar == '[':
(length, newStart) = numericSubstring(encoding, start)
(baseType, newNewStart) = parse(encoding, newStart, end, hasMemberName)
assert encoding[newNewStart] == ']'
return (Array(length, baseType), newNewStart+1)
# objective-C type, or blocks
elif firstChar == '@':
if start >= end or encoding[start] not in '?"':
return (ObjCType(), start)
elif encoding[start] == '?':
return (Primitive(BLOCK), start+1)
else:
# "foo"@"bar"@
# "foo"@"NSObject""bar"@
# "foo"@"bar"@"NSObject"
m = _objcRe(encoding, start)
if not m or (hasMemberName and m.end() < end and encoding[m.end()] not in '"]})'):
return (ObjCType(), start)
(name, protos) = m.groups()
if protos:
protos = protos.split(',')
return (ObjCType(name, protos), m.end())
# struct or union
elif firstChar in '{(':
isUnion = firstChar == '('
newStart = start
while encoding[newStart] not in '=)}':
newStart = balancedSubstring(encoding, newStart)
name = encoding[start:newStart]
if encoding[newStart] == '=':
newStart += 1
stru = Struct(name, isUnion)
while newStart <= end and encoding[newStart] not in ')}':
hasMemberName = encoding[newStart] == '"'
if hasMemberName:
m = _struMemRe(encoding, newStart)
memberName = m.group(1)
newStart = m.end()
else:
memberName = None
(baseType, newNewStart) = parse(encoding, newStart, end, hasMemberName)
stru.append(baseType, memberName)
newStart = newNewStart
stru.freeze()
return (stru, newStart+1)
