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from pyparsing import Literal, CaselessLiteral, Word, OneOrMore, ZeroOrMore, \
Forward, delimitedList, Group, Optional, Combine, alphas, nums, restOfLine, cStyleComment, \
alphanums, ParseException, ParseResults, Keyword, StringEnd, replaceWith
import ptypes
import sys
cvtInt = lambda toks: int(toks[0])
def parseVariableDef(toks):
t = toks[0][0]
pointer = toks[0][1]
name = toks[0][2]
array_size = toks[0][3]
attributes = toks[0][4]
if array_size != None:
t = ptypes.ArrayType(t, array_size)
if pointer != None:
t = ptypes.PointerType(t);
return ptypes.Member(name, t, attributes)
bnf = None
def SPICE_BNF():
global bnf
if not bnf:
# punctuation
colon = Literal(":").suppress()
lbrace = Literal("{").suppress()
rbrace = Literal("}").suppress()
lbrack = Literal("[").suppress()
rbrack = Literal("]").suppress()
lparen = Literal("(").suppress()
rparen = Literal(")").suppress()
equals = Literal("=").suppress()
comma = Literal(",").suppress()
semi = Literal(";").suppress()
# primitive types
int8_ = Keyword("int8").setParseAction(replaceWith(ptypes.int8))
uint8_ = Keyword("uint8").setParseAction(replaceWith(ptypes.uint8))
int16_ = Keyword("int16").setParseAction(replaceWith(ptypes.int16))
uint16_ = Keyword("uint16").setParseAction(replaceWith(ptypes.uint16))
int32_ = Keyword("int32").setParseAction(replaceWith(ptypes.int32))
uint32_ = Keyword("uint32").setParseAction(replaceWith(ptypes.uint32))
int64_ = Keyword("int64").setParseAction(replaceWith(ptypes.int64))
uint64_ = Keyword("uint64").setParseAction(replaceWith(ptypes.uint64))
# keywords
channel_ = Keyword("channel")
enum32_ = Keyword("enum32").setParseAction(replaceWith(32))
enum16_ = Keyword("enum16").setParseAction(replaceWith(16))
enum8_ = Keyword("enum8").setParseAction(replaceWith(8))
flags32_ = Keyword("flags32").setParseAction(replaceWith(32))
flags16_ = Keyword("flags16").setParseAction(replaceWith(16))
flags8_ = Keyword("flags8").setParseAction(replaceWith(8))
channel_ = Keyword("channel")
server_ = Keyword("server")
client_ = Keyword("client")
protocol_ = Keyword("protocol")
typedef_ = Keyword("typedef")
struct_ = Keyword("struct")
message_ = Keyword("message")
image_size_ = Keyword("image_size")
bytes_ = Keyword("bytes")
cstring_ = Keyword("cstring")
switch_ = Keyword("switch")
default_ = Keyword("default")
case_ = Keyword("case")
identifier = Word( alphas, alphanums + "_" )
enumname = Word( alphanums + "_" )
integer = ( Combine( CaselessLiteral("0x") + Word( nums+"abcdefABCDEF" ) ) |
Word( nums+"+-", nums ) ).setName("int").setParseAction(cvtInt)
typename = identifier.copy().setParseAction(lambda toks : ptypes.TypeRef(str(toks[0])))
# This is just normal "types", i.e. not channels or messages
typeSpec = Forward()
attributeValue = integer ^ identifier
attribute = Group(Combine ("@" + identifier) + Optional(lparen + delimitedList(attributeValue) + rparen))
attributes = Group(ZeroOrMore(attribute))
arraySizeSpecImage = Group(image_size_ + lparen + integer + comma + identifier + comma + identifier + rparen)
arraySizeSpecBytes = Group(bytes_ + lparen + identifier + comma + identifier + rparen)
arraySizeSpecCString = Group(cstring_ + lparen + rparen)
arraySizeSpec = lbrack + Optional(identifier ^ integer ^ arraySizeSpecImage ^ arraySizeSpecBytes ^arraySizeSpecCString, default="") + rbrack
variableDef = Group(typeSpec + Optional("*", default=None) + identifier + Optional(arraySizeSpec, default=None) + attributes - semi) \
.setParseAction(parseVariableDef)
switchCase = Group(Group(OneOrMore(default_.setParseAction(replaceWith(None)) + colon | Group(case_.suppress() + Optional("!", default="") + identifier) + colon)) + variableDef) \
.setParseAction(lambda toks: ptypes.SwitchCase(toks[0][0], toks[0][1]))
switchBody = Group(switch_ + lparen + delimitedList(identifier,delim='.', combine=True) + rparen + lbrace + Group(OneOrMore(switchCase)) + rbrace + identifier + attributes - semi) \
.setParseAction(lambda toks: ptypes.Switch(toks[0][1], toks[0][2], toks[0][3], toks[0][4]))
messageBody = structBody = Group(lbrace + ZeroOrMore(variableDef | switchBody) + rbrace)
structSpec = Group(struct_ + identifier + structBody + attributes).setParseAction(lambda toks: ptypes.StructType(toks[0][1], toks[0][2], toks[0][3]))
# have to use longest match for type, in case a user-defined type name starts with a keyword type, like "channel_type"
typeSpec << ( structSpec ^ int8_ ^ uint8_ ^ int16_ ^ uint16_ ^
int32_ ^ uint32_ ^ int64_ ^ uint64_ ^
typename).setName("type")
flagsBody = enumBody = Group(lbrace + delimitedList(Group (enumname + Optional(equals + integer))) + Optional(comma) + rbrace)
messageSpec = Group(message_ + messageBody + attributes).setParseAction(lambda toks: ptypes.MessageType(None, toks[0][1], toks[0][2])) | typename
channelParent = Optional(colon + typename, default=None)
channelMessage = Group(messageSpec + identifier + Optional(equals + integer, default=None) + semi) \
.setParseAction(lambda toks: ptypes.ChannelMember(toks[0][1], toks[0][0], toks[0][2]))
channelBody = channelParent + Group(lbrace + ZeroOrMore( server_ + colon | client_ + colon | channelMessage) + rbrace)
enum_ = (enum32_ | enum16_ | enum8_)
flags_ = (flags32_ | flags16_ | flags8_)
enumDef = Group(enum_ + identifier + enumBody + attributes - semi).setParseAction(lambda toks: ptypes.EnumType(toks[0][0], toks[0][1], toks[0][2], toks[0][3]))
flagsDef = Group(flags_ + identifier + flagsBody + attributes - semi).setParseAction(lambda toks: ptypes.FlagsType(toks[0][0], toks[0][1], toks[0][2], toks[0][3]))
messageDef = Group(message_ + identifier + messageBody + attributes - semi).setParseAction(lambda toks: ptypes.MessageType(toks[0][1], toks[0][2], toks[0][3]))
channelDef = Group(channel_ + identifier + channelBody - semi).setParseAction(lambda toks: ptypes.ChannelType(toks[0][1], toks[0][2], toks[0][3]))
structDef = Group(struct_ + identifier + structBody + attributes - semi).setParseAction(lambda toks: ptypes.StructType(toks[0][1], toks[0][2], toks[0][3]))
typedefDef = Group(typedef_ + identifier + typeSpec + attributes - semi).setParseAction(lambda toks: ptypes.TypeAlias(toks[0][1], toks[0][2], toks[0][3]))
definitions = typedefDef | structDef | enumDef | flagsDef | messageDef | channelDef
protocolChannel = Group(typename + identifier + Optional(equals + integer, default=None) + semi) \
.setParseAction(lambda toks: ptypes.ProtocolMember(toks[0][1], toks[0][0], toks[0][2]))
protocolDef = Group(protocol_ + identifier + Group(lbrace + ZeroOrMore(protocolChannel) + rbrace) + semi) \
.setParseAction(lambda toks: ptypes.ProtocolType(toks[0][1], toks[0][2]))
bnf = ZeroOrMore (definitions) + protocolDef + StringEnd()
singleLineComment = "//" + restOfLine
bnf.ignore( singleLineComment )
bnf.ignore( cStyleComment )
return bnf
def parse(filename):
try:
bnf = SPICE_BNF()
types = bnf.parseFile(filename)
except ParseException, err:
print >> sys.stderr, err.line
print >> sys.stderr, " "*(err.column-1) + "^"
print >> sys.stderr, err
return None
for t in types:
t.resolve()
t.register()
protocol = types[-1]
return protocol
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