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audk/BaseTools/Source/Python/Common/RangeExpression.py

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# # @file
# This file is used to parse and evaluate range expression in Pcd declaration.
#
# Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
# # Import Modules
#
from Common.GlobalData import *
from CommonDataClass.Exceptions import BadExpression
from CommonDataClass.Exceptions import WrnExpression
import uuid
ERR_STRING_EXPR = 'This operator cannot be used in string expression: [%s].'
ERR_SNYTAX = 'Syntax error, the rest of expression cannot be evaluated: [%s].'
ERR_MATCH = 'No matching right parenthesis.'
ERR_STRING_TOKEN = 'Bad string token: [%s].'
ERR_MACRO_TOKEN = 'Bad macro token: [%s].'
ERR_EMPTY_TOKEN = 'Empty token is not allowed.'
ERR_PCD_RESOLVE = 'PCD token cannot be resolved: [%s].'
ERR_VALID_TOKEN = 'No more valid token found from rest of string: [%s].'
ERR_EXPR_TYPE = 'Different types found in expression.'
ERR_OPERATOR_UNSUPPORT = 'Unsupported operator: [%s]'
ERR_REL_NOT_IN = 'Expect "IN" after "not" operator.'
WRN_BOOL_EXPR = 'Operand of boolean type cannot be used in arithmetic expression.'
WRN_EQCMP_STR_OTHERS = '== Comparison between Operand of string type and Boolean/Number Type always return False.'
WRN_NECMP_STR_OTHERS = '!= Comparison between Operand of string type and Boolean/Number Type always return True.'
ERR_RELCMP_STR_OTHERS = 'Operator taking Operand of string type and Boolean/Number Type is not allowed: [%s].'
ERR_STRING_CMP = 'Unicode string and general string cannot be compared: [%s %s %s]'
ERR_ARRAY_TOKEN = 'Bad C array or C format GUID token: [%s].'
ERR_ARRAY_ELE = 'This must be HEX value for NList or Array: [%s].'
ERR_EMPTY_EXPR = 'Empty expression is not allowed.'
ERR_IN_OPERAND = 'Macro after IN operator can only be: $(FAMILY), $(ARCH), $(TOOL_CHAIN_TAG) and $(TARGET).'
def MaxOfType(DataType):
if DataType == 'UINT8':
return int('0xFF', 16)
if DataType == 'UINT16':
return int('0xFFFF', 16)
if DataType == 'UINT32':
return int('0xFFFFFFFF', 16)
if DataType == 'UINT64':
return int('0xFFFFFFFFFFFFFFFF', 16)
class RangeObject(object):
def __init__(self, start, end, empty = False):
if int(start) < int(end):
self.start = int(start)
self.end = int(end)
else:
self.start = int(end)
self.end = int(start)
self.empty = empty
class RangeContainer(object):
def __init__(self):
self.rangelist = []
def push(self, RangeObject):
self.rangelist.append(RangeObject)
self.rangelist = sorted(self.rangelist, key = lambda rangeobj : rangeobj.start)
self.merge()
def pop(self):
for item in self.rangelist:
yield item
def __clean__(self):
newrangelist = []
for rangeobj in self.rangelist:
if rangeobj.empty == True:
continue
else:
newrangelist.append(rangeobj)
self.rangelist = newrangelist
def merge(self):
self.__clean__()
for i in range(0, len(self.rangelist) - 1):
if self.rangelist[i + 1].start > self.rangelist[i].end:
continue
else:
self.rangelist[i + 1].start = self.rangelist[i].start
self.rangelist[i + 1].end = self.rangelist[i + 1].end > self.rangelist[i].end and self.rangelist[i + 1].end or self.rangelist[i].end
self.rangelist[i].empty = True
self.__clean__()
def dump(self):
print "----------------------"
rangelist = ""
for object in self.rangelist:
rangelist = rangelist + "[%d , %d]" % (object.start, object.end)
print rangelist
class XOROperatorObject(object):
def __init__(self):
pass
def Calculate(self, Operand, DataType, SymbolTable):
if type(Operand) == type('') and not Operand.isalnum():
Expr = "XOR ..."
raise BadExpression(ERR_SNYTAX % Expr)
rangeId = str(uuid.uuid1())
rangeContainer = RangeContainer()
rangeContainer.push(RangeObject(0, int(Operand) - 1))
rangeContainer.push(RangeObject(int(Operand) + 1, MaxOfType(DataType)))
SymbolTable[rangeId] = rangeContainer
return rangeId
class LEOperatorObject(object):
def __init__(self):
pass
def Calculate(self, Operand, DataType, SymbolTable):
if type(Operand) == type('') and not Operand.isalnum():
Expr = "LE ..."
raise BadExpression(ERR_SNYTAX % Expr)
rangeId1 = str(uuid.uuid1())
rangeContainer = RangeContainer()
rangeContainer.push(RangeObject(0, int(Operand)))
SymbolTable[rangeId1] = rangeContainer
return rangeId1
class LTOperatorObject(object):
def __init__(self):
pass
def Calculate(self, Operand, DataType, SymbolTable):
if type(Operand) == type('') and not Operand.isalnum():
Expr = "LT ..."
raise BadExpression(ERR_SNYTAX % Expr)
rangeId1 = str(uuid.uuid1())
rangeContainer = RangeContainer()
rangeContainer.push(RangeObject(0, int(Operand) - 1))
SymbolTable[rangeId1] = rangeContainer
return rangeId1
class GEOperatorObject(object):
def __init__(self):
pass
def Calculate(self, Operand, DataType, SymbolTable):
if type(Operand) == type('') and not Operand.isalnum():
Expr = "GE ..."
raise BadExpression(ERR_SNYTAX % Expr)
rangeId1 = str(uuid.uuid1())
rangeContainer = RangeContainer()
rangeContainer.push(RangeObject(int(Operand), MaxOfType(DataType)))
SymbolTable[rangeId1] = rangeContainer
return rangeId1
class GTOperatorObject(object):
def __init__(self):
pass
def Calculate(self, Operand, DataType, SymbolTable):
if type(Operand) == type('') and not Operand.isalnum():
Expr = "GT ..."
raise BadExpression(ERR_SNYTAX % Expr)
rangeId1 = str(uuid.uuid1())
rangeContainer = RangeContainer()
rangeContainer.push(RangeObject(int(Operand) + 1, MaxOfType(DataType)))
SymbolTable[rangeId1] = rangeContainer
return rangeId1
class EQOperatorObject(object):
def __init__(self):
pass
def Calculate(self, Operand, DataType, SymbolTable):
if type(Operand) == type('') and not Operand.isalnum():
Expr = "EQ ..."
raise BadExpression(ERR_SNYTAX % Expr)
rangeId1 = str(uuid.uuid1())
rangeContainer = RangeContainer()
rangeContainer.push(RangeObject(int(Operand) , int(Operand)))
SymbolTable[rangeId1] = rangeContainer
return rangeId1
def GetOperatorObject(Operator):
if Operator == '>':
return GTOperatorObject()
elif Operator == '>=':
return GEOperatorObject()
elif Operator == '<':
return LTOperatorObject()
elif Operator == '<=':
return LEOperatorObject()
elif Operator == '==':
return EQOperatorObject()
elif Operator == '^':
return XOROperatorObject()
else:
raise BadExpression("Bad Operator")
class RangeExpression(object):
# Logical operator mapping
LogicalOperators = {
'&&' : 'and', '||' : 'or',
'!' : 'not', 'AND': 'and',
'OR' : 'or' , 'NOT': 'not',
'XOR': '^' , 'xor': '^',
'EQ' : '==' , 'NE' : '!=',
'GT' : '>' , 'LT' : '<',
'GE' : '>=' , 'LE' : '<=',
'IN' : 'in'
}
NonLetterOpLst = ['+', '-', '&', '|', '^', '!', '=', '>', '<']
PcdPattern = re.compile(r'[_a-zA-Z][0-9A-Za-z_]*\.[_a-zA-Z][0-9A-Za-z_]*$')
HexPattern = re.compile(r'0[xX][0-9a-fA-F]+')
RegGuidPattern = re.compile(r'[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}')
ExRegGuidPattern = re.compile(r'[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$')
SymbolPattern = re.compile("("
"\$\([A-Z][A-Z0-9_]*\)|\$\(\w+\.\w+\)|\w+\.\w+|"
"&&|\|\||!(?!=)|"
"(?<=\W)AND(?=\W)|(?<=\W)OR(?=\W)|(?<=\W)NOT(?=\W)|(?<=\W)XOR(?=\W)|"
"(?<=\W)EQ(?=\W)|(?<=\W)NE(?=\W)|(?<=\W)GT(?=\W)|(?<=\W)LT(?=\W)|(?<=\W)GE(?=\W)|(?<=\W)LE(?=\W)"
")")
RangePattern = re.compile(r'[0-9]+ - [0-9]+')
def preProcessRangeExpr(self, expr):
# convert hex to int
# convert interval to object index. ex. 1 - 10 to a GUID
expr = expr.strip()
NumberDict = {}
for HexNumber in self.HexPattern.findall(expr):
Number = str(int(HexNumber, 16))
NumberDict[HexNumber] = Number
for HexNum in NumberDict:
expr = expr.replace(HexNum, NumberDict[HexNum])
rangedict = {}
for validrange in self.RangePattern.findall(expr):
start, end = validrange.split(" - ")
start = start.strip()
end = end.strip()
rangeid = str(uuid.uuid1())
rangeContainer = RangeContainer()
rangeContainer.push(RangeObject(start, end))
self.operanddict[str(rangeid)] = rangeContainer
rangedict[validrange] = str(rangeid)
for validrange in rangedict:
expr = expr.replace(validrange, rangedict[validrange])
self._Expr = expr
return expr
def EvalRange(self, Operator, Oprand):
operatorobj = GetOperatorObject(Operator)
return operatorobj.Calculate(Oprand, self.PcdDataType, self.operanddict)
def Rangeintersection(self, Oprand1, Oprand2):
rangeContainer1 = self.operanddict[Oprand1]
rangeContainer2 = self.operanddict[Oprand2]
rangeContainer = RangeContainer()
for range1 in rangeContainer1.pop():
for range2 in rangeContainer2.pop():
start1 = range1.start
end1 = range1.end
start2 = range2.start
end2 = range2.end
if start1 >= start2:
start1, start2 = start2, start1
end1, end2 = end2, end1
if range1.empty:
rangeid = str(uuid.uuid1())
rangeContainer.push(RangeObject(0, 0, True))
if end1 < start2:
rangeid = str(uuid.uuid1())
rangeContainer.push(RangeObject(0, 0, True))
elif end1 == start2:
rangeid = str(uuid.uuid1())
rangeContainer.push(RangeObject(end1, end1))
elif end1 <= end2 and end1 > start2:
rangeid = str(uuid.uuid1())
rangeContainer.push(RangeObject(start2, end1))
elif end1 >= end2:
rangeid = str(uuid.uuid1())
rangeContainer.push(RangeObject(start2, end2))
self.operanddict[rangeid] = rangeContainer
# rangeContainer.dump()
return rangeid
def Rangecollections(self, Oprand1, Oprand2):
rangeContainer1 = self.operanddict[Oprand1]
rangeContainer2 = self.operanddict[Oprand2]
rangeContainer = RangeContainer()
for rangeobj in rangeContainer2.pop():
rangeContainer.push(rangeobj)
for rangeobj in rangeContainer1.pop():
rangeContainer.push(rangeobj)
rangeid = str(uuid.uuid1())
self.operanddict[rangeid] = rangeContainer
# rangeContainer.dump()
return rangeid
def NegtiveRange(self, Oprand1):
rangeContainer1 = self.operanddict[Oprand1]
rangeids = []
for rangeobj in rangeContainer1.pop():
rangeContainer = RangeContainer()
rangeid = str(uuid.uuid1())
if rangeobj.empty:
rangeContainer.push(RangeObject(0, MaxOfType(self.PcdDataType)))
else:
if rangeobj.start > 0:
rangeContainer.push(RangeObject(0, rangeobj.start - 1))
if rangeobj.end < MaxOfType(self.PcdDataType):
rangeContainer.push(RangeObject(rangeobj.end + 1, MaxOfType(self.PcdDataType)))
self.operanddict[rangeid] = rangeContainer
rangeids.append(rangeid)
if len(rangeids) == 0:
rangeContainer = RangeContainer()
rangeContainer.push(RangeObject(0, MaxOfType(self.PcdDataType)))
rangeid = str(uuid.uuid1())
self.operanddict[rangeid] = rangeContainer
return rangeid
if len(rangeids) == 1:
return rangeids[0]
re = self.Rangeintersection(rangeids[0], rangeids[1])
for i in range(2, len(rangeids)):
re = self.Rangeintersection(re, rangeids[i])
rangeid2 = str(uuid.uuid1())
self.operanddict[rangeid2] = self.operanddict[re]
return rangeid2
def Eval(self, Operator, Oprand1, Oprand2 = None):
if Operator in ["!", "NOT", "not"]:
if not self.RegGuidPattern.match(Oprand1.strip()):
raise BadExpression(ERR_STRING_EXPR % Operator)
return self.NegtiveRange(Oprand1)
else:
if Operator in ["==", ">=", "<=", ">", "<", '^']:
return self.EvalRange(Operator, Oprand1)
elif Operator == 'and' :
if not self.ExRegGuidPattern.match(Oprand1.strip()) or not self.ExRegGuidPattern.match(Oprand2.strip()):
raise BadExpression(ERR_STRING_EXPR % Operator)
return self.Rangeintersection(Oprand1, Oprand2)
elif Operator == 'or':
if not self.ExRegGuidPattern.match(Oprand1.strip()) or not self.ExRegGuidPattern.match(Oprand2.strip()):
raise BadExpression(ERR_STRING_EXPR % Operator)
return self.Rangecollections(Oprand1, Oprand2)
else:
raise BadExpression(ERR_STRING_EXPR % Operator)
def __init__(self, Expression, PcdDataType, SymbolTable = {}):
self._NoProcess = False
if type(Expression) != type(''):
self._Expr = Expression
self._NoProcess = True
return
self._Expr = Expression.strip()
if not self._Expr.strip():
raise BadExpression(ERR_EMPTY_EXPR)
#
# The symbol table including PCD and macro mapping
#
self._Symb = SymbolTable
self._Symb.update(self.LogicalOperators)
self._Idx = 0
self._Len = len(self._Expr)
self._Token = ''
self._WarnExcept = None
# Literal token without any conversion
self._LiteralToken = ''
# store the operand object
self.operanddict = {}
# The Pcd max value depends on PcdDataType
self.PcdDataType = PcdDataType
# Public entry for this class
# @param RealValue: False: only evaluate if the expression is true or false, used for conditional expression
# True : return the evaluated str(value), used for PCD value
#
# @return: True or False if RealValue is False
# Evaluated value of string format if RealValue is True
#
def __call__(self, RealValue = False, Depth = 0):
if self._NoProcess:
return self._Expr
self._Depth = Depth
self._Expr = self._Expr.strip()
self.preProcessRangeExpr(self._Expr)
# check if the expression does not need to evaluate
if RealValue and Depth == 0:
self._Token = self._Expr
if self.ExRegGuidPattern.match(self._Expr):
return [self.operanddict[self._Expr] ]
self._Idx = 0
self._Token = ''
Val = self._OrExpr()
RealVal = Val
RangeIdList = RealVal.split("or")
RangeList = []
for rangeid in RangeIdList:
RangeList.append(self.operanddict[rangeid.strip()])
return RangeList
# Template function to parse binary operators which have same precedence
# Expr [Operator Expr]*
def _ExprFuncTemplate(self, EvalFunc, OpLst):
Val = EvalFunc()
while self._IsOperator(OpLst):
Op = self._Token
try:
Val = self.Eval(Op, Val, EvalFunc())
except WrnExpression, Warn:
self._WarnExcept = Warn
Val = Warn.result
return Val
# A [|| B]*
def _OrExpr(self):
return self._ExprFuncTemplate(self._AndExpr, ["OR", "or"])
# A [&& B]*
def _AndExpr(self):
return self._ExprFuncTemplate(self._NeExpr, ["AND", "and"])
def _NeExpr(self):
Val = self._RelExpr()
while self._IsOperator([ "!=", "NOT", "not"]):
Op = self._Token
if Op in ["!", "NOT", "not"]:
if not self._IsOperator(["IN", "in"]):
raise BadExpression(ERR_REL_NOT_IN)
Op += ' ' + self._Token
try:
Val = self.Eval(Op, Val, self._RelExpr())
except WrnExpression, Warn:
self._WarnExcept = Warn
Val = Warn.result
return Val
# [!]*A
def _RelExpr(self):
if self._IsOperator(["NOT" , "LE", "GE", "LT", "GT", "EQ", "XOR"]):
Token = self._Token
Val = self._NeExpr()
try:
return self.Eval(Token, Val)
except WrnExpression, Warn:
self._WarnExcept = Warn
return Warn.result
return self._IdenExpr()
# Parse identifier or encapsulated expression
def _IdenExpr(self):
Tk = self._GetToken()
if Tk == '(':
Val = self._OrExpr()
try:
# _GetToken may also raise BadExpression
if self._GetToken() != ')':
raise BadExpression(ERR_MATCH)
except BadExpression:
raise BadExpression(ERR_MATCH)
return Val
return Tk
# Skip whitespace or tab
def __SkipWS(self):
for Char in self._Expr[self._Idx:]:
if Char not in ' \t':
break
self._Idx += 1
# Try to convert string to number
def __IsNumberToken(self):
Radix = 10
if self._Token.lower()[0:2] == '0x' and len(self._Token) > 2:
Radix = 16
try:
self._Token = int(self._Token, Radix)
return True
except ValueError:
return False
except TypeError:
return False
# Parse array: {...}
def __GetArray(self):
Token = '{'
self._Idx += 1
self.__GetNList(True)
Token += self._LiteralToken
if self._Idx >= self._Len or self._Expr[self._Idx] != '}':
raise BadExpression(ERR_ARRAY_TOKEN % Token)
Token += '}'
# All whitespace and tabs in array are already stripped.
IsArray = IsGuid = False
if len(Token.split(',')) == 11 and len(Token.split(',{')) == 2 \
and len(Token.split('},')) == 1:
HexLen = [11, 6, 6, 5, 4, 4, 4, 4, 4, 4, 6]
HexList = Token.split(',')
if HexList[3].startswith('{') and \
not [Index for Index, Hex in enumerate(HexList) if len(Hex) > HexLen[Index]]:
IsGuid = True
if Token.lstrip('{').rstrip('}').find('{') == -1:
if not [Hex for Hex in Token.lstrip('{').rstrip('}').split(',') if len(Hex) > 4]:
IsArray = True
if not IsArray and not IsGuid:
raise BadExpression(ERR_ARRAY_TOKEN % Token)
self._Idx += 1
self._Token = self._LiteralToken = Token
return self._Token
# Parse string, the format must be: "..."
def __GetString(self):
Idx = self._Idx
# Skip left quote
self._Idx += 1
# Replace escape \\\", \"
Expr = self._Expr[self._Idx:].replace('\\\\', '//').replace('\\\"', '\\\'')
for Ch in Expr:
self._Idx += 1
if Ch == '"':
break
self._Token = self._LiteralToken = self._Expr[Idx:self._Idx]
if not self._Token.endswith('"'):
raise BadExpression(ERR_STRING_TOKEN % self._Token)
self._Token = self._Token[1:-1]
return self._Token
# Get token that is comprised by alphanumeric, underscore or dot(used by PCD)
# @param IsAlphaOp: Indicate if parsing general token or script operator(EQ, NE...)
def __GetIdToken(self, IsAlphaOp = False):
IdToken = ''
for Ch in self._Expr[self._Idx:]:
if not self.__IsIdChar(Ch):
break
self._Idx += 1
IdToken += Ch
self._Token = self._LiteralToken = IdToken
if not IsAlphaOp:
self.__ResolveToken()
return self._Token
# Try to resolve token
def __ResolveToken(self):
if not self._Token:
raise BadExpression(ERR_EMPTY_TOKEN)
# PCD token
if self.PcdPattern.match(self._Token):
if self._Token not in self._Symb:
Ex = BadExpression(ERR_PCD_RESOLVE % self._Token)
Ex.Pcd = self._Token
raise Ex
self._Token = RangeExpression(self._Symb[self._Token], self._Symb)(True, self._Depth + 1)
if type(self._Token) != type(''):
self._LiteralToken = hex(self._Token)
return
if self._Token.startswith('"'):
self._Token = self._Token[1:-1]
elif self._Token in ["FALSE", "false", "False"]:
self._Token = False
elif self._Token in ["TRUE", "true", "True"]:
self._Token = True
else:
self.__IsNumberToken()
def __GetNList(self, InArray = False):
self._GetSingleToken()
if not self.__IsHexLiteral():
if InArray:
raise BadExpression(ERR_ARRAY_ELE % self._Token)
return self._Token
self.__SkipWS()
Expr = self._Expr[self._Idx:]
if not Expr.startswith(','):
return self._Token
NList = self._LiteralToken
while Expr.startswith(','):
NList += ','
self._Idx += 1
self.__SkipWS()
self._GetSingleToken()
if not self.__IsHexLiteral():
raise BadExpression(ERR_ARRAY_ELE % self._Token)
NList += self._LiteralToken
self.__SkipWS()
Expr = self._Expr[self._Idx:]
self._Token = self._LiteralToken = NList
return self._Token
def __IsHexLiteral(self):
if self._LiteralToken.startswith('{') and \
self._LiteralToken.endswith('}'):
return True
if self.HexPattern.match(self._LiteralToken):
Token = self._LiteralToken[2:]
Token = Token.lstrip('0')
if not Token:
self._LiteralToken = '0x0'
else:
self._LiteralToken = '0x' + Token.lower()
return True
return False
def _GetToken(self):
return self.__GetNList()
@staticmethod
def __IsIdChar(Ch):
return Ch in '._/:' or Ch.isalnum()
# Parse operand
def _GetSingleToken(self):
self.__SkipWS()
Expr = self._Expr[self._Idx:]
if Expr.startswith('L"'):
# Skip L
self._Idx += 1
UStr = self.__GetString()
self._Token = 'L"' + UStr + '"'
return self._Token
self._Token = ''
if Expr:
Ch = Expr[0]
Match = self.RegGuidPattern.match(Expr)
if Match and not Expr[Match.end():Match.end() + 1].isalnum() \
and Expr[Match.end():Match.end() + 1] != '_':
self._Idx += Match.end()
self._Token = Expr[0:Match.end()]
return self._Token
elif self.__IsIdChar(Ch):
return self.__GetIdToken()
elif Ch == '(' or Ch == ')':
self._Idx += 1
self._Token = Ch
return self._Token
raise BadExpression(ERR_VALID_TOKEN % Expr)
# Parse operator
def _GetOperator(self):
self.__SkipWS()
LegalOpLst = ['&&', '||', '!=', '==', '>=', '<='] + self.NonLetterOpLst
self._Token = ''
Expr = self._Expr[self._Idx:]
# Reach end of expression
if not Expr:
return ''
# Script operator: LT, GT, LE, GE, EQ, NE, and, or, xor, not
if Expr[0].isalpha():
return self.__GetIdToken(True)
# Start to get regular operator: +, -, <, > ...
if Expr[0] not in self.NonLetterOpLst:
return ''
OpToken = ''
for Ch in Expr:
if Ch in self.NonLetterOpLst:
if '!' == Ch and OpToken:
break
self._Idx += 1
OpToken += Ch
else:
break
if OpToken not in LegalOpLst:
raise BadExpression(ERR_OPERATOR_UNSUPPORT % OpToken)
self._Token = OpToken
return OpToken
# Check if current token matches the operators given from OpList
def _IsOperator(self, OpList):
Idx = self._Idx
self._GetOperator()
if self._Token in OpList:
if self._Token in self.LogicalOperators:
self._Token = self.LogicalOperators[self._Token]
return True
self._Idx = Idx
return False
# UTRangeList()
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