def parser():
global _parser
if _parser is None:
ParserElement.setDefaultWhitespaceChars("")
lbrack, rbrack, lbrace, rbrace, lparen, rparen = map(Literal, "[]{}()")
reMacro = Combine("\\" + oneOf(list("dws")))
escapedChar = ~reMacro + Combine("\\" + oneOf(list(printables)))
reLiteralChar = "".join(
c for c in printables if c not in r"\[]{}().*?+|") + " \t"
reRange = Combine(lbrack + SkipTo(rbrack, ignore=escapedChar) + rbrack)
reLiteral = (escapedChar | oneOf(list(reLiteralChar)))
reDot = Literal(".")
repetition = ((lbrace + Word(nums).setResultsName("count") + rbrace) |
(lbrace + Word(nums).setResultsName("minCount") + "," +
Word(nums).setResultsName("maxCount") + rbrace)
| oneOf(list("*+?")))
reRange.setParseAction(handleRange)
reLiteral.setParseAction(handleLiteral)
reMacro.setParseAction(handleMacro)
reDot.setParseAction(handleDot)
reTerm = (reLiteral | reRange | reMacro | reDot)
reExpr = operatorPrecedence(reTerm, [
(repetition, 1, opAssoc.LEFT, handleRepetition),
(None, 2, opAssoc.LEFT, handleSequence),
(Suppress('|'), 2, opAssoc.LEFT, handleAlternative),
])
_parser = reExpr
return _parser
def getLogLineBNF():
global logLineBNF
if logLineBNF is None:
integer = Word(nums)
ipAddress = delimitedList(integer, ".", combine=True)
timeZoneOffset = Word("+-", nums)
month = Word(string.uppercase, string.lowercase, exact=3)
serverDateTime = Group(
Suppress("[") +
Combine(integer + "/" + month + "/" + integer + ":" + integer +
":" + integer + ":" + integer) + timeZoneOffset +
Suppress("]"))
logLineBNF = (
ipAddress.setResultsName("ipAddr") + Suppress("-") +
("-" | Word(alphas + nums + "@._")).setResultsName("auth") +
serverDateTime.setResultsName("timestamp") +
dblQuotedString.setResultsName("cmd").setParseAction(getCmdFields)
+ (integer | "-").setResultsName("statusCode") +
(integer | "-").setResultsName("numBytesSent") +
dblQuotedString.setResultsName("referrer").setParseAction(
removeQuotes) + dblQuotedString.setResultsName(
"clientSfw").setParseAction(removeQuotes))
return logLineBNF
def parser():
global _parser
if _parser is None:
ParserElement.setDefaultWhitespaceChars("")
lbrack,rbrack,lbrace,rbrace,lparen,rparen = map(Literal,"[]{}()")
reMacro = Combine("\\" + oneOf(list("dws")))
escapedChar = ~reMacro + Combine("\\" + oneOf(list(printables)))
reLiteralChar = "".join(c for c in printables if c not in r"\[]{}().*?+|") + " \t"
reRange = Combine(lbrack + SkipTo(rbrack,ignore=escapedChar) + rbrack)
reLiteral = ( escapedChar | oneOf(list(reLiteralChar)) )
reDot = Literal(".")
repetition = (
( lbrace + Word(nums).setResultsName("count") + rbrace ) |
( lbrace + Word(nums).setResultsName("minCount")+","+ Word(nums).setResultsName("maxCount") + rbrace ) |
oneOf(list("*+?"))
)
reRange.setParseAction(handleRange)
reLiteral.setParseAction(handleLiteral)
reMacro.setParseAction(handleMacro)
reDot.setParseAction(handleDot)
reTerm = ( reLiteral | reRange | reMacro | reDot )
reExpr = operatorPrecedence( reTerm,
[
(repetition, 1, opAssoc.LEFT, handleRepetition),
(None, 2, opAssoc.LEFT, handleSequence),
(Suppress('|'), 2, opAssoc.LEFT, handleAlternative),
]
)
_parser = reExpr
return _parser
def parser(self):
"""
This function returns a parser.
The grammar should be like most full text search engines (Google, Tsearch, Lucene).
Grammar:
- a query consists of alphanumeric words, with an optional '*' wildcard
at the end of a word
- a sequence of words between quotes is a literal string
- words can be used together by using operators ('and' or 'or')
- words with operators can be grouped with parenthesis
- a word or group of words can be preceded by a 'not' operator
- the 'and' operator precedes an 'or' operator
- if an operator is missing, use an 'and' operator
"""
operatorOr = Forward()
operatorWord = Group(Combine(Word(alphanums) + Suppress('*'))).setResultsName('wordwildcard') | \
Group(Word(alphanums)).setResultsName('word')
operatorQuotesContent = Forward()
operatorQuotesContent << (
(operatorWord + operatorQuotesContent) | operatorWord)
operatorQuotes = Group(
Suppress('"') + operatorQuotesContent +
Suppress('"')).setResultsName("quotes") | operatorWord
operatorParenthesis = Group(
(Suppress("(") + operatorOr +
Suppress(")"))).setResultsName("parenthesis") | operatorQuotes
operatorNot = Forward()
operatorNot << (
Group(Suppress(Keyword("not", caseless=True)) +
operatorNot).setResultsName("not") | operatorParenthesis)
operatorAnd = Forward()
operatorAnd << (
Group(operatorNot + Suppress(Keyword("and", caseless=True)) +
operatorAnd).setResultsName("and")
| Group(operatorNot + OneOrMore(~oneOf("and or") + operatorAnd)
).setResultsName("and") | operatorNot)
operatorOr << (
Group(operatorAnd + Suppress(Keyword("or", caseless=True)) +
operatorOr).setResultsName("or") | operatorAnd)
return operatorOr.parseString
# The aim of this parser is not to support database application,
# but to create automagically a pgn annotated reading the log console file
# of a lecture of ICC (Internet Chess Club), saved by Blitzin.
# Of course you can modify the Abstract Syntax Tree to your purpose.
#
# Copyright 2004, by Alberto Santini http://www.albertosantini.it/chess/
#
from pyparsingOD import alphanums, nums, quotedString
from pyparsingOD import Combine, Forward, Group, Literal, oneOf, OneOrMore, Optional, Suppress, ZeroOrMore, White, Word
from pyparsingOD import ParseException
#
# define pgn grammar
#
tag = Suppress("[") + Word(alphanums) + Combine(quotedString) + Suppress("]")
comment = Suppress("{") + Word(alphanums + " ") + Suppress("}")
dot = Literal(".")
piece = oneOf("K Q B N R")
file_coord = oneOf("a b c d e f g h")
rank_coord = oneOf("1 2 3 4 5 6 7 8")
capture = oneOf("x :")
promote = Literal("=")
castle_queenside = Literal("O-O-O") | Literal("0-0-0") | Literal("o-o-o")
castle_kingside = Literal("O-O") | Literal("0-0") | Literal("o-o")
move_number = Optional(comment) + Word(nums) + dot
m1 = file_coord + rank_coord # pawn move e.g. d4
m2 = file_coord + capture + file_coord + rank_coord # pawn capture move e.g. dxe5
m3 = file_coord + "8" + promote + piece # pawn promotion e.g. e8=Q
(even binary content) inside the structure. This is done by pre-
sizing the data with the NUMBER similar to Dan Bernstein's netstrings
setup.
SPACE White space is basically ignored. This is interesting because since
Stackish is serialized consistently this means you can use \n as the
separation character and perform reasonable diffs on two structures.
"""
from pyparsingOD import Suppress,Word,nums,alphas,alphanums,Combine,oneOf,\
Optional,QuotedString,Forward,Group,ZeroOrMore,printables,srange
MARK,UNMARK,AT,COLON,QUOTE = map(Suppress,"[]@:'")
NUMBER = Word(nums)
NUMBER.setParseAction(lambda t:int(t[0]))
FLOAT = Combine(oneOf("+ -") + Word(nums) + "." + Optional(Word(nums)))
FLOAT.setParseAction(lambda t:float(t[0]))
STRING = QuotedString('"', multiline=True)
WORD = Word(alphas,alphanums+"_:")
ATTRIBUTE = Combine(AT + WORD)
strBody = Forward()
def setBodyLength(tokens):
strBody << Word(srange(r'[\0x00-\0xffff]'), exact=int(tokens[0]))
return ""
BLOB = Combine(QUOTE + Word(nums).setParseAction(setBodyLength) +
COLON + strBody + QUOTE)
item = Forward()
def assignUsing(s):
def assignPA(tokens):
#
# Copyright 2010, Paul McGuire
#
# A partial implementation of a parser of Excel formula expressions.
#
from pyparsingOD import (CaselessKeyword, Suppress, Word, alphas,
alphanums, nums, Optional, Group, oneOf, Forward, Regex,
operatorPrecedence, opAssoc, dblQuotedString, delimitedList,
Combine, Literal, QuotedString)
EQ,EXCL,LPAR,RPAR,COLON,COMMA = map(Suppress, '=!():,')
EXCL, DOLLAR = map(Literal,"!$")
sheetRef = Word(alphas, alphanums) | QuotedString("'",escQuote="''")
colRef = Optional(DOLLAR) + Word(alphas,max=2)
rowRef = Optional(DOLLAR) + Word(nums)
cellRef = Combine(Group(Optional(sheetRef + EXCL)("sheet") + colRef("col") +
rowRef("row")))
cellRange = (Group(cellRef("start") + COLON + cellRef("end"))("range")
| cellRef | Word(alphas,alphanums))
expr = Forward()
COMPARISON_OP = oneOf("< = > >= <= != <>")
condExpr = expr + COMPARISON_OP + expr
ifFunc = (CaselessKeyword("if") +
LPAR +
Group(condExpr)("condition") +
COMMA + expr("if_true") +
COMMA + expr("if_false") + RPAR)
def _pushFirst( str, loc, toks ):
if debug_flag: print("pushing ", toks[0], "str is ", str)
exprStack.append( toks[0] )
def _assignVar( str, loc, toks ):
global targetvar
targetvar = toks[0]
#-----------------------------------------------------------------------------
# The following statements define the grammar for the parser.
point = Literal('.')
e = CaselessLiteral('E')
plusorminus = Literal('+') | Literal('-')
number = Word(nums)
integer = Combine( Optional(plusorminus) + number )
floatnumber = Combine( integer +
Optional( point + Optional(number) ) +
Optional( e + integer )
)
lbracket = Literal("[")
rbracket = Literal("]")
ident = Forward()
## The definition below treats array accesses as identifiers. This means your expressions
## can include references to array elements, rows and columns, e.g., a = b[i] + 5.
## Expressions within []'s are not presently supported, so a = b[i+1] will raise
## a ParseException.
ident = Combine(Word(alphas + '-',alphanums + '_') + \
ZeroOrMore(lbracket + (Word(alphas + '-',alphanums + '_')|integer) + rbracket) \
)
PERIOD = Literal(".").suppress()
RANGLE = Literal(">").suppress()
RBRACE = Literal("]").suppress()
RPAREN = Literal(")").suppress()
CATEGORIES = CaselessLiteral("categories").suppress()
END = CaselessLiteral("end").suppress()
FONT = CaselessLiteral("font").suppress()
HINT = CaselessLiteral("hint").suppress()
ITEM = CaselessLiteral("item").suppress()
OBJECT = CaselessLiteral("object").suppress()
attribute_value_pair = Forward() # this is recursed in item_list_entry
simple_identifier = Word(alphas, alphanums + "_")
identifier = Combine(simple_identifier +
ZeroOrMore(Literal(".") + simple_identifier))
object_name = identifier
object_type = identifier
# Integer and floating point values are converted to Python longs and floats, respectively.
int_value = Combine(Optional("-") +
Word(nums)).setParseAction(lambda s, l, t: [int(t[0])])
float_value = Combine(Optional("-") + Optional(Word(nums)) + "." +
Word(nums)).setParseAction(lambda s, l, t: [float(t[0])])
number_value = float_value | int_value
# Base16 constants are left in string form, including the surrounding braces.
base16_value = Combine(
Literal("{") + OneOrMore(Word("0123456789ABCDEFabcdef")) + Literal("}"),
adjacent=False)
def eval(self):
val1 = self.value[0].eval()
for op, val in operatorOperands(self.value[1:]):
fn = EvalComparisonOp.opMap[op]
val2 = val.eval()
if not fn(val1, val2):
break
val1 = val2
else:
return True
return False
# define the parser
integer = Word(nums)
real = Combine(Word(nums) + "." + Word(nums))
variable = Word(alphas, exact=1)
operand = real | integer | variable
signop = oneOf('+ -')
multop = oneOf('* /')
plusop = oneOf('+ -')
expop = Literal('**')
# use parse actions to attach EvalXXX constructors to sub-expressions
operand.setParseAction(EvalConstant)
arith_expr = operatorPrecedence(operand, [
(signop, 1, opAssoc.RIGHT, EvalSignOp),
(expop, 2, opAssoc.LEFT, EvalPowerOp),
(multop, 2, opAssoc.LEFT, EvalMultOp),
(plusop, 2, opAssoc.LEFT, EvalAddOp),
def Verilog_BNF():
global verilogbnf
if verilogbnf is None:
# compiler directives
compilerDirective = Combine( "`" + \
oneOf("define undef ifdef else endif default_nettype "
"include resetall timescale unconnected_drive "
"nounconnected_drive celldefine endcelldefine") + \
restOfLine ).setName("compilerDirective")
# primitives
SEMI,COLON,LPAR,RPAR,LBRACE,RBRACE,LBRACK,RBRACK,DOT,COMMA,EQ = map(Literal,";:(){}[].,=")
identLead = alphas+"$_"
identBody = alphanums+"$_"
identifier1 = Regex( r"\.?["+identLead+"]["+identBody+"]*(\.["+identLead+"]["+identBody+"]*)*"
).setName("baseIdent")
identifier2 = Regex(r"\\\S+").setParseAction(lambda t:t[0][1:]).setName("escapedIdent")#.setDebug()
identifier = identifier1 | identifier2
assert(identifier2 == r'\abc')
hexnums = nums + "abcdefABCDEF" + "_?"
base = Regex("'[bBoOdDhH]").setName("base")
basedNumber = Combine( Optional( Word(nums + "_") ) + base + Word(hexnums+"xXzZ"),
joinString=" ", adjacent=False ).setName("basedNumber")
#~ number = ( basedNumber | Combine( Word( "+-"+spacedNums, spacedNums ) +
#~ Optional( DOT + Optional( Word( spacedNums ) ) ) +
#~ Optional( e + Word( "+-"+spacedNums, spacedNums ) ) ).setName("numeric") )
number = ( basedNumber | \
Regex(r"[+-]?[0-9_]+(\.[0-9_]*)?([Ee][+-]?[0-9_]+)?") \
).setName("numeric")
#~ decnums = nums + "_"
#~ octnums = "01234567" + "_"
expr = Forward().setName("expr")
concat = Group( LBRACE + delimitedList( expr ) + RBRACE )
multiConcat = Group("{" + expr + concat + "}").setName("multiConcat")
funcCall = Group(identifier + LPAR + Optional( delimitedList( expr ) ) + RPAR).setName("funcCall")
subscrRef = Group(LBRACK + delimitedList( expr, COLON ) + RBRACK)
subscrIdentifier = Group( identifier + Optional( subscrRef ) )
#~ scalarConst = "0" | (( FollowedBy('1') + oneOf("1'b0 1'b1 1'bx 1'bX 1'B0 1'B1 1'Bx 1'BX 1") ))
scalarConst = Regex("0|1('[Bb][01xX])?")
mintypmaxExpr = Group( expr + COLON + expr + COLON + expr ).setName("mintypmax")
primary = (
number |
(LPAR + mintypmaxExpr + RPAR ) |
( LPAR + Group(expr) + RPAR ).setName("nestedExpr") |
multiConcat |
concat |
dblQuotedString |
funcCall |
subscrIdentifier
)
unop = oneOf( "+ - ! ~ & ~& | ^| ^ ~^" ).setName("unop")
binop = oneOf( "+ - * / % == != === !== && "
"|| < <= > >= & | ^ ^~ >> << ** <<< >>>" ).setName("binop")
expr << (
( unop + expr ) | # must be first!
( primary + "?" + expr + COLON + expr ) |
( primary + Optional( binop + expr ) )
)
lvalue = subscrIdentifier | concat
# keywords
if_ = Keyword("if")
else_ = Keyword("else")
edge = Keyword("edge")
posedge = Keyword("posedge")
negedge = Keyword("negedge")
specify = Keyword("specify")
endspecify = Keyword("endspecify")
fork = Keyword("fork")
join = Keyword("join")
begin = Keyword("begin")
end = Keyword("end")
default = Keyword("default")
forever = Keyword("forever")
repeat = Keyword("repeat")
while_ = Keyword("while")
for_ = Keyword("for")
case = oneOf( "case casez casex" )
endcase = Keyword("endcase")
wait = Keyword("wait")
disable = Keyword("disable")
deassign = Keyword("deassign")
force = Keyword("force")
release = Keyword("release")
assign = Keyword("assign")
eventExpr = Forward()
eventTerm = ( posedge + expr ) | ( negedge + expr ) | expr | ( LPAR + eventExpr + RPAR )
eventExpr << (
Group( delimitedList( eventTerm, Keyword("or") ) )
)
eventControl = Group( "@" + ( ( LPAR + eventExpr + RPAR ) | identifier | "*" ) ).setName("eventCtrl")
delayArg = ( number |
Word(alphanums+"$_") | #identifier |
( LPAR + Group( delimitedList( mintypmaxExpr | expr ) ) + RPAR )
).setName("delayArg")#.setDebug()
delay = Group( "#" + delayArg ).setName("delay")#.setDebug()
delayOrEventControl = delay | eventControl
assgnmt = Group( lvalue + EQ + Optional( delayOrEventControl ) + expr ).setName( "assgnmt" )
nbAssgnmt = Group(( lvalue + "<=" + Optional( delay ) + expr ) |
( lvalue + "<=" + Optional( eventControl ) + expr )).setName( "nbassgnmt" )
range = LBRACK + expr + COLON + expr + RBRACK
paramAssgnmt = Group( identifier + EQ + expr ).setName("paramAssgnmt")
parameterDecl = Group( "parameter" + Optional( range ) + delimitedList( paramAssgnmt ) + SEMI).setName("paramDecl")
inputDecl = Group( "input" + Optional( range ) + delimitedList( identifier ) + SEMI )
outputDecl = Group( "output" + Optional( range ) + delimitedList( identifier ) + SEMI )
inoutDecl = Group( "inout" + Optional( range ) + delimitedList( identifier ) + SEMI )
regIdentifier = Group( identifier + Optional( LBRACK + expr + COLON + expr + RBRACK ) )
regDecl = Group( "reg" + Optional("signed") + Optional( range ) + delimitedList( regIdentifier ) + SEMI ).setName("regDecl")
timeDecl = Group( "time" + delimitedList( regIdentifier ) + SEMI )
integerDecl = Group( "integer" + delimitedList( regIdentifier ) + SEMI )
strength0 = oneOf("supply0 strong0 pull0 weak0 highz0")
strength1 = oneOf("supply1 strong1 pull1 weak1 highz1")
driveStrength = Group( LPAR + ( ( strength0 + COMMA + strength1 ) |
( strength1 + COMMA + strength0 ) ) + RPAR ).setName("driveStrength")
nettype = oneOf("wire tri tri1 supply0 wand triand tri0 supply1 wor trior trireg")
expandRange = Optional( oneOf("scalared vectored") ) + range
realDecl = Group( "real" + delimitedList( identifier ) + SEMI )
eventDecl = Group( "event" + delimitedList( identifier ) + SEMI )
blockDecl = (
parameterDecl |
regDecl |
integerDecl |
realDecl |
timeDecl |
eventDecl
)
stmt = Forward().setName("stmt")#.setDebug()
stmtOrNull = stmt | SEMI
caseItem = ( delimitedList( expr ) + COLON + stmtOrNull ) | \
( default + Optional(":") + stmtOrNull )
stmt << Group(
( begin + Group( ZeroOrMore( stmt ) ) + end ).setName("begin-end") |
( if_ + Group(LPAR + expr + RPAR) + stmtOrNull + Optional( else_ + stmtOrNull ) ).setName("if") |
( delayOrEventControl + stmtOrNull ) |
( case + LPAR + expr + RPAR + OneOrMore( caseItem ) + endcase ) |
( forever + stmt ) |
( repeat + LPAR + expr + RPAR + stmt ) |
( while_ + LPAR + expr + RPAR + stmt ) |
( for_ + LPAR + assgnmt + SEMI + Group( expr ) + SEMI + assgnmt + RPAR + stmt ) |
( fork + ZeroOrMore( stmt ) + join ) |
( fork + COLON + identifier + ZeroOrMore( blockDecl ) + ZeroOrMore( stmt ) + end ) |
( wait + LPAR + expr + RPAR + stmtOrNull ) |
( "->" + identifier + SEMI ) |
( disable + identifier + SEMI ) |
( assign + assgnmt + SEMI ) |
( deassign + lvalue + SEMI ) |
( force + assgnmt + SEMI ) |
( release + lvalue + SEMI ) |
( begin + COLON + identifier + ZeroOrMore( blockDecl ) + ZeroOrMore( stmt ) + end ).setName("begin:label-end") |
# these *have* to go at the end of the list!!!
( assgnmt + SEMI ) |
( nbAssgnmt + SEMI ) |
( Combine( Optional("$") + identifier ) + Optional( LPAR + delimitedList(expr|empty) + RPAR ) + SEMI )
).setName("stmtBody")
"""
x::=<blocking_assignment> ;
x||= <non_blocking_assignment> ;
x||= if ( <expression> ) <statement_or_null>
x||= if ( <expression> ) <statement_or_null> else <statement_or_null>
x||= case ( <expression> ) <case_item>+ endcase
x||= casez ( <expression> ) <case_item>+ endcase
x||= casex ( <expression> ) <case_item>+ endcase
x||= forever <statement>
x||= repeat ( <expression> ) <statement>
x||= while ( <expression> ) <statement>
x||= for ( <assignment> ; <expression> ; <assignment> ) <statement>
x||= <delay_or_event_control> <statement_or_null>
x||= wait ( <expression> ) <statement_or_null>
x||= -> <name_of_event> ;
x||= <seq_block>
x||= <par_block>
x||= <task_enable>
x||= <system_task_enable>
x||= disable <name_of_task> ;
x||= disable <name_of_block> ;
x||= assign <assignment> ;
x||= deassign <lvalue> ;
x||= force <assignment> ;
x||= release <lvalue> ;
"""
alwaysStmt = Group( "always" + Optional(eventControl) + stmt ).setName("alwaysStmt")
initialStmt = Group( "initial" + stmt ).setName("initialStmt")
chargeStrength = Group( LPAR + oneOf( "small medium large" ) + RPAR ).setName("chargeStrength")
continuousAssign = Group(
assign + Optional( driveStrength ) + Optional( delay ) + delimitedList( assgnmt ) + SEMI
).setName("continuousAssign")
tfDecl = (
parameterDecl |
inputDecl |
outputDecl |
inoutDecl |
regDecl |
timeDecl |
integerDecl |
realDecl
)
functionDecl = Group(
"function" + Optional( range | "integer" | "real" ) + identifier + SEMI +
Group( OneOrMore( tfDecl ) ) +
Group( ZeroOrMore( stmt ) ) +
"endfunction"
)
inputOutput = oneOf("input output")
netDecl1Arg = ( nettype +
Optional( expandRange ) +
Optional( delay ) +
Group( delimitedList( ~inputOutput + identifier ) ) )
netDecl2Arg = ( "trireg" +
Optional( chargeStrength ) +
Optional( expandRange ) +
Optional( delay ) +
Group( delimitedList( ~inputOutput + identifier ) ) )
netDecl3Arg = ( nettype +
Optional( driveStrength ) +
Optional( expandRange ) +
Optional( delay ) +
Group( delimitedList( assgnmt ) ) )
netDecl1 = Group(netDecl1Arg + SEMI).setName("netDecl1")
netDecl2 = Group(netDecl2Arg + SEMI).setName("netDecl2")
netDecl3 = Group(netDecl3Arg + SEMI).setName("netDecl3")
gateType = oneOf("and nand or nor xor xnor buf bufif0 bufif1 "
"not notif0 notif1 pulldown pullup nmos rnmos "
"pmos rpmos cmos rcmos tran rtran tranif0 "
"rtranif0 tranif1 rtranif1" )
gateInstance = Optional( Group( identifier + Optional( range ) ) ) + \
LPAR + Group( delimitedList( expr ) ) + RPAR
gateDecl = Group( gateType +
Optional( driveStrength ) +
Optional( delay ) +
delimitedList( gateInstance) +
SEMI )
udpInstance = Group( Group( identifier + Optional(range | subscrRef) ) +
LPAR + Group( delimitedList( expr ) ) + RPAR )
udpInstantiation = Group( identifier -
Optional( driveStrength ) +
Optional( delay ) +
delimitedList( udpInstance ) +
SEMI ).setName("udpInstantiation")
parameterValueAssignment = Group( Literal("#") + LPAR + Group( delimitedList( expr ) ) + RPAR )
namedPortConnection = Group( DOT + identifier + LPAR + expr + RPAR ).setName("namedPortConnection")#.setDebug()
assert(r'.\abc (abc )' == namedPortConnection)
modulePortConnection = expr | empty
#~ moduleInstance = Group( Group ( identifier + Optional(range) ) +
#~ ( delimitedList( modulePortConnection ) |
#~ delimitedList( namedPortConnection ) ) )
inst_args = Group( LPAR + (delimitedList( namedPortConnection ) |
delimitedList( modulePortConnection )) + RPAR).setName("inst_args")
moduleInstance = Group( Group ( identifier + Optional(range) ) + inst_args ).setName("moduleInstance")#.setDebug()
moduleInstantiation = Group( identifier +
Optional( parameterValueAssignment ) +
delimitedList( moduleInstance ).setName("moduleInstanceList") +
SEMI ).setName("moduleInstantiation")
parameterOverride = Group( "defparam" + delimitedList( paramAssgnmt ) + SEMI )
task = Group( "task" + identifier + SEMI +
ZeroOrMore( tfDecl ) +
stmtOrNull +
"endtask" )
specparamDecl = Group( "specparam" + delimitedList( paramAssgnmt ) + SEMI )
pathDescr1 = Group( LPAR + subscrIdentifier + "=>" + subscrIdentifier + RPAR )
pathDescr2 = Group( LPAR + Group( delimitedList( subscrIdentifier ) ) + "*>" +
Group( delimitedList( subscrIdentifier ) ) + RPAR )
pathDescr3 = Group( LPAR + Group( delimitedList( subscrIdentifier ) ) + "=>" +
Group( delimitedList( subscrIdentifier ) ) + RPAR )
pathDelayValue = Group( ( LPAR + Group( delimitedList( mintypmaxExpr | expr ) ) + RPAR ) |
mintypmaxExpr |
expr )
pathDecl = Group( ( pathDescr1 | pathDescr2 | pathDescr3 ) + EQ + pathDelayValue + SEMI ).setName("pathDecl")
portConditionExpr = Forward()
portConditionTerm = Optional(unop) + subscrIdentifier
portConditionExpr << portConditionTerm + Optional( binop + portConditionExpr )
polarityOp = oneOf("+ -")
levelSensitivePathDecl1 = Group(
if_ + Group(LPAR + portConditionExpr + RPAR) +
subscrIdentifier + Optional( polarityOp ) + "=>" + subscrIdentifier + EQ +
pathDelayValue +
SEMI )
levelSensitivePathDecl2 = Group(
if_ + Group(LPAR + portConditionExpr + RPAR) +
LPAR + Group( delimitedList( subscrIdentifier ) ) + Optional( polarityOp ) + "*>" +
Group( delimitedList( subscrIdentifier ) ) + RPAR + EQ +
pathDelayValue +
SEMI )
levelSensitivePathDecl = levelSensitivePathDecl1 | levelSensitivePathDecl2
edgeIdentifier = posedge | negedge
edgeSensitivePathDecl1 = Group(
Optional( if_ + Group(LPAR + expr + RPAR) ) +
LPAR + Optional( edgeIdentifier ) +
subscrIdentifier + "=>" +
LPAR + subscrIdentifier + Optional( polarityOp ) + COLON + expr + RPAR + RPAR +
EQ +
pathDelayValue +
SEMI )
edgeSensitivePathDecl2 = Group(
Optional( if_ + Group(LPAR + expr + RPAR) ) +
LPAR + Optional( edgeIdentifier ) +
subscrIdentifier + "*>" +
LPAR + delimitedList( subscrIdentifier ) + Optional( polarityOp ) + COLON + expr + RPAR + RPAR +
EQ +
pathDelayValue +
SEMI )
edgeSensitivePathDecl = edgeSensitivePathDecl1 | edgeSensitivePathDecl2
edgeDescr = oneOf("01 10 0x x1 1x x0").setName("edgeDescr")
timCheckEventControl = Group( posedge | negedge | (edge + LBRACK + delimitedList( edgeDescr ) + RBRACK ))
timCheckCond = Forward()
timCondBinop = oneOf("== === != !==")
timCheckCondTerm = ( expr + timCondBinop + scalarConst ) | ( Optional("~") + expr )
timCheckCond << ( ( LPAR + timCheckCond + RPAR ) | timCheckCondTerm )
timCheckEvent = Group( Optional( timCheckEventControl ) +
subscrIdentifier +
Optional( "&&&" + timCheckCond ) )
timCheckLimit = expr
controlledTimingCheckEvent = Group( timCheckEventControl + subscrIdentifier +
Optional( "&&&" + timCheckCond ) )
notifyRegister = identifier
systemTimingCheck1 = Group( "$setup" +
LPAR + timCheckEvent + COMMA + timCheckEvent + COMMA + timCheckLimit +
Optional( COMMA + notifyRegister ) + RPAR +
SEMI )
systemTimingCheck2 = Group( "$hold" +
LPAR + timCheckEvent + COMMA + timCheckEvent + COMMA + timCheckLimit +
Optional( COMMA + notifyRegister ) + RPAR +
SEMI )
systemTimingCheck3 = Group( "$period" +
LPAR + controlledTimingCheckEvent + COMMA + timCheckLimit +
Optional( COMMA + notifyRegister ) + RPAR +
SEMI )
systemTimingCheck4 = Group( "$width" +
LPAR + controlledTimingCheckEvent + COMMA + timCheckLimit +
Optional( COMMA + expr + COMMA + notifyRegister ) + RPAR +
SEMI )
systemTimingCheck5 = Group( "$skew" +
LPAR + timCheckEvent + COMMA + timCheckEvent + COMMA + timCheckLimit +
Optional( COMMA + notifyRegister ) + RPAR +
SEMI )
systemTimingCheck6 = Group( "$recovery" +
LPAR + controlledTimingCheckEvent + COMMA + timCheckEvent + COMMA + timCheckLimit +
Optional( COMMA + notifyRegister ) + RPAR +
SEMI )
systemTimingCheck7 = Group( "$setuphold" +
LPAR + timCheckEvent + COMMA + timCheckEvent + COMMA + timCheckLimit + COMMA + timCheckLimit +
Optional( COMMA + notifyRegister ) + RPAR +
SEMI )
systemTimingCheck = (FollowedBy('$') + ( systemTimingCheck1 | systemTimingCheck2 | systemTimingCheck3 |
systemTimingCheck4 | systemTimingCheck5 | systemTimingCheck6 | systemTimingCheck7 )).setName("systemTimingCheck")
sdpd = if_ + Group(LPAR + expr + RPAR) + \
( pathDescr1 | pathDescr2 ) + EQ + pathDelayValue + SEMI
specifyItem = ~Keyword("endspecify") +(
specparamDecl |
pathDecl |
levelSensitivePathDecl |
edgeSensitivePathDecl |
systemTimingCheck |
sdpd
)
"""
x::= <specparam_declaration>
x||= <path_declaration>
x||= <level_sensitive_path_declaration>
x||= <edge_sensitive_path_declaration>
x||= <system_timing_check>
x||= <sdpd>
"""
specifyBlock = Group( "specify" + ZeroOrMore( specifyItem ) + "endspecify" ).setName("specifyBlock")
moduleItem = ~Keyword("endmodule") + (
parameterDecl |
inputDecl |
outputDecl |
inoutDecl |
regDecl |
netDecl3 |
netDecl1 |
netDecl2 |
timeDecl |
integerDecl |
realDecl |
eventDecl |
gateDecl |
parameterOverride |
continuousAssign |
specifyBlock |
initialStmt |
alwaysStmt |
task |
functionDecl |
# these have to be at the end - they start with identifiers
moduleInstantiation |
udpInstantiation
)
""" All possible moduleItems, from Verilog grammar spec
x::= <parameter_declaration>
x||= <input_declaration>
x||= <output_declaration>
x||= <inout_declaration>
?||= <net_declaration> (spec does not seem consistent for this item)
x||= <reg_declaration>
x||= <time_declaration>
x||= <integer_declaration>
x||= <real_declaration>
x||= <event_declaration>
x||= <gate_declaration>
x||= <UDP_instantiation>
x||= <module_instantiation>
x||= <parameter_override>
x||= <continuous_assign>
x||= <specify_block>
x||= <initial_statement>
x||= <always_statement>
x||= <task>
x||= <function>
"""
portRef = subscrIdentifier
portExpr = portRef | Group( LBRACE + delimitedList( portRef ) + RBRACE )
port = portExpr | Group( ( DOT + identifier + LPAR + portExpr + RPAR ) )
moduleHdr = Group ( oneOf("module macromodule") + identifier +
Optional( LPAR + Group( Optional( delimitedList(
Group(oneOf("input output") +
(netDecl1Arg | netDecl2Arg | netDecl3Arg) ) |
port ) ) ) +
RPAR ) + SEMI ).setName("moduleHdr")
module = Group( moduleHdr +
Group( ZeroOrMore( moduleItem ) ) +
"endmodule" ).setName("module")#.setDebug()
udpDecl = outputDecl | inputDecl | regDecl
#~ udpInitVal = oneOf("1'b0 1'b1 1'bx 1'bX 1'B0 1'B1 1'Bx 1'BX 1 0 x X")
udpInitVal = (Regex("1'[bB][01xX]") | Regex("[01xX]")).setName("udpInitVal")
udpInitialStmt = Group( "initial" +
identifier + EQ + udpInitVal + SEMI ).setName("udpInitialStmt")
levelSymbol = oneOf("0 1 x X ? b B")
levelInputList = Group( OneOrMore( levelSymbol ).setName("levelInpList") )
outputSymbol = oneOf("0 1 x X")
combEntry = Group( levelInputList + COLON + outputSymbol + SEMI )
edgeSymbol = oneOf("r R f F p P n N *")
edge = Group( LPAR + levelSymbol + levelSymbol + RPAR ) | \
Group( edgeSymbol )
edgeInputList = Group( ZeroOrMore( levelSymbol ) + edge + ZeroOrMore( levelSymbol ) )
inputList = levelInputList | edgeInputList
seqEntry = Group( inputList + COLON + levelSymbol + COLON + ( outputSymbol | "-" ) + SEMI ).setName("seqEntry")
udpTableDefn = Group( "table" +
OneOrMore( combEntry | seqEntry ) +
"endtable" ).setName("table")
"""
<UDP>
::= primitive <name_of_UDP> ( <name_of_variable> <,<name_of_variable>>* ) ;
<UDP_declaration>+
<UDP_initial_statement>?
<table_definition>
endprimitive
"""
udp = Group( "primitive" + identifier +
LPAR + Group( delimitedList( identifier ) ) + RPAR + SEMI +
OneOrMore( udpDecl ) +
Optional( udpInitialStmt ) +
udpTableDefn +
"endprimitive" )
verilogbnf = OneOrMore( module | udp ) + StringEnd()
verilogbnf.ignore( cppStyleComment )
verilogbnf.ignore( compilerDirective )
return verilogbnf
from pyparsingOD import Word, ZeroOrMore, printables, Suppress, OneOrMore, Group, \
LineEnd, Optional, White, originalTextFor, hexnums, nums, Combine, Literal, Keyword, \
cStyleComment, Regex, Forward, MatchFirst, And, srange, oneOf, alphas, alphanums, \
delimitedList
# http://www.antlr.org/grammar/ANTLR/ANTLRv3.g
# Tokens
EOL = Suppress(LineEnd()) # $
singleTextString = originalTextFor(ZeroOrMore(~EOL + (White(" \t") | Word(printables)))).leaveWhitespace()
XDIGIT = hexnums
INT = Word(nums)
ESC = Literal('\\') + (oneOf(list(r'nrtbf\">'+"'")) | ('u' + Word(hexnums, exact=4)) | Word(printables, exact=1))
LITERAL_CHAR = ESC | ~(Literal("'") | Literal('\\')) + Word(printables, exact=1)
CHAR_LITERAL = Suppress("'") + LITERAL_CHAR + Suppress("'")
STRING_LITERAL = Suppress("'") + Combine(OneOrMore(LITERAL_CHAR)) + Suppress("'")
DOUBLE_QUOTE_STRING_LITERAL = '"' + ZeroOrMore(LITERAL_CHAR) + '"'
DOUBLE_ANGLE_STRING_LITERAL = '<<' + ZeroOrMore(Word(printables, exact=1)) + '>>'
TOKEN_REF = Word(alphas.upper(), alphanums+'_')
RULE_REF = Word(alphas.lower(), alphanums+'_')
ACTION_ESC = (Suppress("\\") + Suppress("'")) | Suppress('\\"') | Suppress('\\') + (~(Literal("'") | Literal('"')) + Word(printables, exact=1))
ACTION_CHAR_LITERAL = Suppress("'") + (ACTION_ESC | ~(Literal('\\') | Literal("'")) + Word(printables, exact=1)) + Suppress("'")
ACTION_STRING_LITERAL = Suppress('"') + ZeroOrMore(ACTION_ESC | ~(Literal('\\') | Literal('"')) + Word(printables, exact=1)) + Suppress('"')
SRC = Suppress('src') + ACTION_STRING_LITERAL("file") + INT("line")
id = TOKEN_REF | RULE_REF
SL_COMMENT = Suppress('//') + Suppress('$ANTLR') + SRC | ZeroOrMore(~EOL + Word(printables)) + EOL
ML_COMMENT = cStyleComment
WS = OneOrMore(Suppress(' ') | Suppress('\t') | (Optional(Suppress('\r')) + Literal('\n')))
WS_LOOP = ZeroOrMore(SL_COMMENT | ML_COMMENT)
NESTED_ARG_ACTION = Forward()
NESTED_ARG_ACTION << Suppress('[') + ZeroOrMore(NESTED_ARG_ACTION | ACTION_STRING_LITERAL | ACTION_CHAR_LITERAL) + Suppress(']')
# getNTPservers.py
#
# Demonstration of the parsing module, implementing a HTML page scanner,
# to extract a list of NTP time servers from the NIST web site.
#
# Copyright 2004, by Paul McGuire
#
from pyparsingOD import Word, Combine, Suppress, CharsNotIn, nums
import urllib.request, urllib.parse, urllib.error
integer = Word(nums)
ipAddress = Combine( integer + "." + integer + "." + integer + "." + integer )
tdStart = Suppress("<td>")
tdEnd = Suppress("</td>")
timeServerPattern = tdStart + ipAddress.setResultsName("ipAddr") + tdEnd + \
tdStart + CharsNotIn("<").setResultsName("loc") + tdEnd
# get list of time servers
nistTimeServerURL = "http://www.boulder.nist.gov/timefreq/service/time-servers.html"
serverListPage = urllib.request.urlopen( nistTimeServerURL )
serverListHTML = serverListPage.read()
serverListPage.close()
addrs = {}
for srvr,startloc,endloc in timeServerPattern.scanString( serverListHTML ):
print(srvr.ipAddr, "-", srvr.loc)
addrs[srvr.ipAddr] = srvr.loc
# or do this:
#~ addr,loc = srvr
#~ print addr, "-", loc
(even binary content) inside the structure. This is done by pre-
sizing the data with the NUMBER similar to Dan Bernstein's netstrings
setup.
SPACE White space is basically ignored. This is interesting because since
Stackish is serialized consistently this means you can use \n as the
separation character and perform reasonable diffs on two structures.
"""
from pyparsingOD import Suppress,Word,nums,alphas,alphanums,Combine,oneOf,\
Optional,QuotedString,Forward,Group,ZeroOrMore,printables,srange
MARK, UNMARK, AT, COLON, QUOTE = map(Suppress, "[]@:'")
NUMBER = Word(nums)
NUMBER.setParseAction(lambda t: int(t[0]))
FLOAT = Combine(oneOf("+ -") + Word(nums) + "." + Optional(Word(nums)))
FLOAT.setParseAction(lambda t: float(t[0]))
STRING = QuotedString('"', multiline=True)
WORD = Word(alphas, alphanums + "_:")
ATTRIBUTE = Combine(AT + WORD)
strBody = Forward()
def setBodyLength(tokens):
strBody << Word(srange(r'[\0x00-\0xffff]'), exact=int(tokens[0]))
return ""
BLOB = Combine(QUOTE + Word(nums).setParseAction(setBodyLength) + COLON +
strBody + QUOTE)
# getNTPservers.py
#
# Demonstration of the parsing module, implementing a HTML page scanner,
# to extract a list of NTP time servers from the NIST web site.
#
# Copyright 2004, by Paul McGuire
#
from pyparsingOD import Word, Combine, Suppress, CharsNotIn, nums
import urllib.request, urllib.parse, urllib.error
integer = Word(nums)
ipAddress = Combine(integer + "." + integer + "." + integer + "." + integer)
tdStart = Suppress("<td>")
tdEnd = Suppress("</td>")
timeServerPattern = tdStart + ipAddress.setResultsName("ipAddr") + tdEnd + \
tdStart + CharsNotIn("<").setResultsName("loc") + tdEnd
# get list of time servers
nistTimeServerURL = "http://www.boulder.nist.gov/timefreq/service/time-servers.html"
serverListPage = urllib.request.urlopen(nistTimeServerURL)
serverListHTML = serverListPage.read()
serverListPage.close()
addrs = {}
for srvr, startloc, endloc in timeServerPattern.scanString(serverListHTML):
print(srvr.ipAddr, "-", srvr.loc)
addrs[srvr.ipAddr] = srvr.loc
# or do this:
#~ addr,loc = srvr
#~ print addr, "-", loc
ident = Word(alphas, alphanums + "_$").setName("identifier")
columnName = Upcase(delimitedList(ident, ".", combine=True))
columnNameList = Group(delimitedList(columnName))
tableName = Upcase(delimitedList(ident, ".", combine=True))
tableNameList = Group(delimitedList(tableName))
whereExpression = Forward()
and_ = Keyword("and", caseless=True)
or_ = Keyword("or", caseless=True)
in_ = Keyword("in", caseless=True)
E = CaselessLiteral("E")
binop = oneOf("= != < > >= <= eq ne lt le gt ge", caseless=True)
arithSign = Word("+-", exact=1)
realNum = Combine(
Optional(arithSign) +
(Word(nums) + "." + Optional(Word(nums)) | ("." + Word(nums))) +
Optional(E + Optional(arithSign) + Word(nums)))
intNum = Combine(
Optional(arithSign) + Word(nums) +
Optional(E + Optional("+") + Word(nums)))
columnRval = realNum | intNum | quotedString | columnName # need to add support for alg expressions
whereCondition = Group((columnName + binop + columnRval)
| (columnName + in_ + "(" + delimitedList(columnRval) +
")") | (columnName + in_ + "(" + selectStmt + ")")
| ("(" + whereExpression + ")"))
whereExpression << whereCondition + ZeroOrMore((and_ | or_) + whereExpression)
# define the grammar
selectStmt << (selectToken + ('*' | columnNameList).setResultsName("columns") +
fromToken + tableNameList.setResultsName("tables") +
#
# cLibHeader.py
#
# A simple parser to extract API doc info from a C header file
#
# Copyright, 2012 - Paul McGuire
#
from pyparsingOD import Word, alphas, alphanums, Combine, oneOf, Optional, delimitedList, Group, Keyword
testdata = """
int func1(float *vec, int len, double arg1);
int func2(float **arr, float *vec, int len, double arg1, double arg2);
"""
ident = Word(alphas, alphanums + "_")
vartype = Combine(oneOf("float double int char") + Optional(Word("*")),
adjacent=False)
arglist = delimitedList(Group(vartype("type") + ident("name")))
functionCall = Keyword("int") + ident("name") + "(" + arglist(
"args") + ")" + ";"
for fn, s, e in functionCall.scanString(testdata):
print(fn.name)
for a in fn.args:
print(" - %(name)s (%(type)s)" % a)
# getNTPserversNew.py
#
# Demonstration of the parsing module, implementing a HTML page scanner,
# to extract a list of NTP time servers from the NIST web site.
#
# Copyright 2004-2010, by Paul McGuire
# September, 2010 - updated to more current use of setResultsName, new NIST URL
#
from pyparsingOD import (Word, Combine, Suppress, SkipTo, nums, makeHTMLTags,
delimitedList, alphas, alphanums)
import urllib.request, urllib.parse, urllib.error
integer = Word(nums)
ipAddress = Combine( integer + "." + integer + "." + integer + "." + integer )
hostname = delimitedList(Word(alphas,alphanums+"-_"),".",combine=True)
tdStart,tdEnd = makeHTMLTags("td")
timeServerPattern = (tdStart + hostname("hostname") + tdEnd +
tdStart + ipAddress("ipAddr") + tdEnd +
tdStart + SkipTo(tdEnd)("loc") + tdEnd)
# get list of time servers
nistTimeServerURL = "http://tf.nist.gov/tf-cgi/servers.cgi#"
serverListPage = urllib.request.urlopen( nistTimeServerURL )
serverListHTML = serverListPage.read()
serverListPage.close()
addrs = {}
for srvr,startloc,endloc in timeServerPattern.scanString( serverListHTML ):
print("%s (%s) - %s" % (srvr.ipAddr, srvr.hostname.strip(), srvr.loc.strip()))
addrs[srvr.ipAddr] = srvr.loc
