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0b5203bd84
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: "Bob Feng" <bob.c.feng@intel.com> Reviewed-by: "Chen, Hesheng" <hesheng.chen@intel.com> Reviewed-by: "Liu, Yingke D" <yingke.d.liu@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17822 6f19259b-4bc3-4df7-8a09-765794883524
738 lines
27 KiB
Python
738 lines
27 KiB
Python
# # @file
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# This file is used to parse and evaluate range expression in Pcd declaration.
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#
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# Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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# # Import Modules
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#
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from Common.GlobalData import *
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from CommonDataClass.Exceptions import BadExpression
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from CommonDataClass.Exceptions import WrnExpression
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import uuid
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ERR_STRING_EXPR = 'This operator cannot be used in string expression: [%s].'
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ERR_SNYTAX = 'Syntax error, the rest of expression cannot be evaluated: [%s].'
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ERR_MATCH = 'No matching right parenthesis.'
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ERR_STRING_TOKEN = 'Bad string token: [%s].'
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ERR_MACRO_TOKEN = 'Bad macro token: [%s].'
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ERR_EMPTY_TOKEN = 'Empty token is not allowed.'
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ERR_PCD_RESOLVE = 'PCD token cannot be resolved: [%s].'
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ERR_VALID_TOKEN = 'No more valid token found from rest of string: [%s].'
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ERR_EXPR_TYPE = 'Different types found in expression.'
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ERR_OPERATOR_UNSUPPORT = 'Unsupported operator: [%s]'
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ERR_REL_NOT_IN = 'Expect "IN" after "not" operator.'
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WRN_BOOL_EXPR = 'Operand of boolean type cannot be used in arithmetic expression.'
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WRN_EQCMP_STR_OTHERS = '== Comparison between Operand of string type and Boolean/Number Type always return False.'
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WRN_NECMP_STR_OTHERS = '!= Comparison between Operand of string type and Boolean/Number Type always return True.'
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ERR_RELCMP_STR_OTHERS = 'Operator taking Operand of string type and Boolean/Number Type is not allowed: [%s].'
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ERR_STRING_CMP = 'Unicode string and general string cannot be compared: [%s %s %s]'
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ERR_ARRAY_TOKEN = 'Bad C array or C format GUID token: [%s].'
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ERR_ARRAY_ELE = 'This must be HEX value for NList or Array: [%s].'
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ERR_EMPTY_EXPR = 'Empty expression is not allowed.'
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ERR_IN_OPERAND = 'Macro after IN operator can only be: $(FAMILY), $(ARCH), $(TOOL_CHAIN_TAG) and $(TARGET).'
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def MaxOfType(DataType):
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if DataType == 'UINT8':
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return int('0xFF', 16)
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if DataType == 'UINT16':
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return int('0xFFFF', 16)
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if DataType == 'UINT32':
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return int('0xFFFFFFFF', 16)
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if DataType == 'UINT64':
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return int('0xFFFFFFFFFFFFFFFF', 16)
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class RangeObject(object):
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def __init__(self, start, end, empty = False):
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if int(start) < int(end):
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self.start = int(start)
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self.end = int(end)
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else:
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self.start = int(end)
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self.end = int(start)
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self.empty = empty
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class RangeContainer(object):
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def __init__(self):
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self.rangelist = []
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def push(self, RangeObject):
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self.rangelist.append(RangeObject)
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self.rangelist = sorted(self.rangelist, key = lambda rangeobj : rangeobj.start)
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self.merge()
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def pop(self):
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for item in self.rangelist:
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yield item
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def __clean__(self):
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newrangelist = []
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for rangeobj in self.rangelist:
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if rangeobj.empty == True:
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continue
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else:
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newrangelist.append(rangeobj)
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self.rangelist = newrangelist
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def merge(self):
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self.__clean__()
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for i in range(0, len(self.rangelist) - 1):
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if self.rangelist[i + 1].start > self.rangelist[i].end:
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continue
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else:
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self.rangelist[i + 1].start = self.rangelist[i].start
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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
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self.rangelist[i].empty = True
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self.__clean__()
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def dump(self):
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print "----------------------"
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rangelist = ""
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for object in self.rangelist:
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rangelist = rangelist + "[%d , %d]" % (object.start, object.end)
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print rangelist
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class XOROperatorObject(object):
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def __init__(self):
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pass
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def Calculate(self, Operand, DataType, SymbolTable):
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if type(Operand) == type('') and not Operand.isalnum():
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Expr = "XOR ..."
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raise BadExpression(ERR_SNYTAX % Expr)
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rangeId = str(uuid.uuid1())
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rangeContainer = RangeContainer()
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rangeContainer.push(RangeObject(0, int(Operand) - 1))
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rangeContainer.push(RangeObject(int(Operand) + 1, MaxOfType(DataType)))
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SymbolTable[rangeId] = rangeContainer
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return rangeId
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class LEOperatorObject(object):
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def __init__(self):
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pass
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def Calculate(self, Operand, DataType, SymbolTable):
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if type(Operand) == type('') and not Operand.isalnum():
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Expr = "LE ..."
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raise BadExpression(ERR_SNYTAX % Expr)
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rangeId1 = str(uuid.uuid1())
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rangeContainer = RangeContainer()
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rangeContainer.push(RangeObject(0, int(Operand)))
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SymbolTable[rangeId1] = rangeContainer
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return rangeId1
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class LTOperatorObject(object):
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def __init__(self):
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pass
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def Calculate(self, Operand, DataType, SymbolTable):
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if type(Operand) == type('') and not Operand.isalnum():
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Expr = "LT ..."
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raise BadExpression(ERR_SNYTAX % Expr)
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rangeId1 = str(uuid.uuid1())
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rangeContainer = RangeContainer()
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rangeContainer.push(RangeObject(0, int(Operand) - 1))
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SymbolTable[rangeId1] = rangeContainer
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return rangeId1
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class GEOperatorObject(object):
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def __init__(self):
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pass
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def Calculate(self, Operand, DataType, SymbolTable):
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if type(Operand) == type('') and not Operand.isalnum():
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Expr = "GE ..."
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raise BadExpression(ERR_SNYTAX % Expr)
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rangeId1 = str(uuid.uuid1())
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rangeContainer = RangeContainer()
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rangeContainer.push(RangeObject(int(Operand), MaxOfType(DataType)))
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SymbolTable[rangeId1] = rangeContainer
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return rangeId1
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class GTOperatorObject(object):
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def __init__(self):
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pass
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def Calculate(self, Operand, DataType, SymbolTable):
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if type(Operand) == type('') and not Operand.isalnum():
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Expr = "GT ..."
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raise BadExpression(ERR_SNYTAX % Expr)
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rangeId1 = str(uuid.uuid1())
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rangeContainer = RangeContainer()
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rangeContainer.push(RangeObject(int(Operand) + 1, MaxOfType(DataType)))
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SymbolTable[rangeId1] = rangeContainer
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return rangeId1
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class EQOperatorObject(object):
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def __init__(self):
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pass
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def Calculate(self, Operand, DataType, SymbolTable):
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if type(Operand) == type('') and not Operand.isalnum():
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Expr = "EQ ..."
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raise BadExpression(ERR_SNYTAX % Expr)
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rangeId1 = str(uuid.uuid1())
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rangeContainer = RangeContainer()
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rangeContainer.push(RangeObject(int(Operand) , int(Operand)))
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SymbolTable[rangeId1] = rangeContainer
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return rangeId1
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def GetOperatorObject(Operator):
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if Operator == '>':
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return GTOperatorObject()
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elif Operator == '>=':
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return GEOperatorObject()
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elif Operator == '<':
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return LTOperatorObject()
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elif Operator == '<=':
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return LEOperatorObject()
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elif Operator == '==':
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return EQOperatorObject()
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elif Operator == '^':
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return XOROperatorObject()
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else:
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raise BadExpression("Bad Operator")
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class RangeExpression(object):
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# Logical operator mapping
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LogicalOperators = {
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'&&' : 'and', '||' : 'or',
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'!' : 'not', 'AND': 'and',
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'OR' : 'or' , 'NOT': 'not',
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'XOR': '^' , 'xor': '^',
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'EQ' : '==' , 'NE' : '!=',
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'GT' : '>' , 'LT' : '<',
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'GE' : '>=' , 'LE' : '<=',
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'IN' : 'in'
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}
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NonLetterOpLst = ['+', '-', '&', '|', '^', '!', '=', '>', '<']
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PcdPattern = re.compile(r'[_a-zA-Z][0-9A-Za-z_]*\.[_a-zA-Z][0-9A-Za-z_]*$')
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HexPattern = re.compile(r'0[xX][0-9a-fA-F]+')
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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}')
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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}$')
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SymbolPattern = re.compile("("
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"\$\([A-Z][A-Z0-9_]*\)|\$\(\w+\.\w+\)|\w+\.\w+|"
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"&&|\|\||!(?!=)|"
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"(?<=\W)AND(?=\W)|(?<=\W)OR(?=\W)|(?<=\W)NOT(?=\W)|(?<=\W)XOR(?=\W)|"
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"(?<=\W)EQ(?=\W)|(?<=\W)NE(?=\W)|(?<=\W)GT(?=\W)|(?<=\W)LT(?=\W)|(?<=\W)GE(?=\W)|(?<=\W)LE(?=\W)"
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")")
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RangePattern = re.compile(r'[0-9]+ - [0-9]+')
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def preProcessRangeExpr(self, expr):
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# convert hex to int
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# convert interval to object index. ex. 1 - 10 to a GUID
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expr = expr.strip()
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NumberDict = {}
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for HexNumber in self.HexPattern.findall(expr):
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Number = str(int(HexNumber, 16))
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NumberDict[HexNumber] = Number
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for HexNum in NumberDict:
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expr = expr.replace(HexNum, NumberDict[HexNum])
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rangedict = {}
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for validrange in self.RangePattern.findall(expr):
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start, end = validrange.split(" - ")
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start = start.strip()
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end = end.strip()
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rangeid = str(uuid.uuid1())
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rangeContainer = RangeContainer()
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rangeContainer.push(RangeObject(start, end))
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self.operanddict[str(rangeid)] = rangeContainer
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rangedict[validrange] = str(rangeid)
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for validrange in rangedict:
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expr = expr.replace(validrange, rangedict[validrange])
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self._Expr = expr
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return expr
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def EvalRange(self, Operator, Oprand):
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operatorobj = GetOperatorObject(Operator)
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return operatorobj.Calculate(Oprand, self.PcdDataType, self.operanddict)
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def Rangeintersection(self, Oprand1, Oprand2):
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rangeContainer1 = self.operanddict[Oprand1]
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rangeContainer2 = self.operanddict[Oprand2]
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rangeContainer = RangeContainer()
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for range1 in rangeContainer1.pop():
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for range2 in rangeContainer2.pop():
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start1 = range1.start
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end1 = range1.end
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start2 = range2.start
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end2 = range2.end
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if start1 >= start2:
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start1, start2 = start2, start1
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end1, end2 = end2, end1
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if range1.empty:
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rangeid = str(uuid.uuid1())
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rangeContainer.push(RangeObject(0, 0, True))
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if end1 < start2:
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rangeid = str(uuid.uuid1())
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rangeContainer.push(RangeObject(0, 0, True))
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elif end1 == start2:
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rangeid = str(uuid.uuid1())
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rangeContainer.push(RangeObject(end1, end1))
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elif end1 <= end2 and end1 > start2:
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rangeid = str(uuid.uuid1())
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rangeContainer.push(RangeObject(start2, end1))
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elif end1 >= end2:
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rangeid = str(uuid.uuid1())
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rangeContainer.push(RangeObject(start2, end2))
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self.operanddict[rangeid] = rangeContainer
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# rangeContainer.dump()
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return rangeid
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def Rangecollections(self, Oprand1, Oprand2):
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rangeContainer1 = self.operanddict[Oprand1]
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rangeContainer2 = self.operanddict[Oprand2]
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rangeContainer = RangeContainer()
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for rangeobj in rangeContainer2.pop():
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rangeContainer.push(rangeobj)
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for rangeobj in rangeContainer1.pop():
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rangeContainer.push(rangeobj)
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rangeid = str(uuid.uuid1())
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self.operanddict[rangeid] = rangeContainer
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# rangeContainer.dump()
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return rangeid
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def NegtiveRange(self, Oprand1):
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rangeContainer1 = self.operanddict[Oprand1]
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rangeids = []
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for rangeobj in rangeContainer1.pop():
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rangeContainer = RangeContainer()
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rangeid = str(uuid.uuid1())
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if rangeobj.empty:
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rangeContainer.push(RangeObject(0, MaxOfType(self.PcdDataType)))
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else:
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if rangeobj.start > 0:
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rangeContainer.push(RangeObject(0, rangeobj.start - 1))
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if rangeobj.end < MaxOfType(self.PcdDataType):
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rangeContainer.push(RangeObject(rangeobj.end + 1, MaxOfType(self.PcdDataType)))
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self.operanddict[rangeid] = rangeContainer
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rangeids.append(rangeid)
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if len(rangeids) == 0:
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rangeContainer = RangeContainer()
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rangeContainer.push(RangeObject(0, MaxOfType(self.PcdDataType)))
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rangeid = str(uuid.uuid1())
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self.operanddict[rangeid] = rangeContainer
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return rangeid
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if len(rangeids) == 1:
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return rangeids[0]
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re = self.Rangeintersection(rangeids[0], rangeids[1])
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for i in range(2, len(rangeids)):
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re = self.Rangeintersection(re, rangeids[i])
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rangeid2 = str(uuid.uuid1())
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self.operanddict[rangeid2] = self.operanddict[re]
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return rangeid2
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def Eval(self, Operator, Oprand1, Oprand2 = None):
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if Operator in ["!", "NOT", "not"]:
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if not self.RegGuidPattern.match(Oprand1.strip()):
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raise BadExpression(ERR_STRING_EXPR % Operator)
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return self.NegtiveRange(Oprand1)
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else:
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if Operator in ["==", ">=", "<=", ">", "<", '^']:
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return self.EvalRange(Operator, Oprand1)
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elif Operator == 'and' :
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if not self.ExRegGuidPattern.match(Oprand1.strip()) or not self.ExRegGuidPattern.match(Oprand2.strip()):
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raise BadExpression(ERR_STRING_EXPR % Operator)
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return self.Rangeintersection(Oprand1, Oprand2)
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elif Operator == 'or':
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if not self.ExRegGuidPattern.match(Oprand1.strip()) or not self.ExRegGuidPattern.match(Oprand2.strip()):
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raise BadExpression(ERR_STRING_EXPR % Operator)
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return self.Rangecollections(Oprand1, Oprand2)
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else:
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raise BadExpression(ERR_STRING_EXPR % Operator)
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def __init__(self, Expression, PcdDataType, SymbolTable = {}):
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self._NoProcess = False
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if type(Expression) != type(''):
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self._Expr = Expression
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self._NoProcess = True
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return
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self._Expr = Expression.strip()
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if not self._Expr.strip():
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raise BadExpression(ERR_EMPTY_EXPR)
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#
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# The symbol table including PCD and macro mapping
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#
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self._Symb = SymbolTable
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self._Symb.update(self.LogicalOperators)
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self._Idx = 0
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self._Len = len(self._Expr)
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self._Token = ''
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self._WarnExcept = None
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# Literal token without any conversion
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self._LiteralToken = ''
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# store the operand object
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self.operanddict = {}
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# The Pcd max value depends on PcdDataType
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self.PcdDataType = PcdDataType
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# Public entry for this class
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# @param RealValue: False: only evaluate if the expression is true or false, used for conditional expression
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# True : return the evaluated str(value), used for PCD value
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#
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# @return: True or False if RealValue is False
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# Evaluated value of string format if RealValue is True
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#
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def __call__(self, RealValue = False, Depth = 0):
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if self._NoProcess:
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return self._Expr
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self._Depth = Depth
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self._Expr = self._Expr.strip()
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self.preProcessRangeExpr(self._Expr)
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# check if the expression does not need to evaluate
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if RealValue and Depth == 0:
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self._Token = self._Expr
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if self.ExRegGuidPattern.match(self._Expr):
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return [self.operanddict[self._Expr] ]
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self._Idx = 0
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self._Token = ''
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Val = self._OrExpr()
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RealVal = Val
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RangeIdList = RealVal.split("or")
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RangeList = []
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for rangeid in RangeIdList:
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RangeList.append(self.operanddict[rangeid.strip()])
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return RangeList
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# Template function to parse binary operators which have same precedence
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# Expr [Operator Expr]*
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def _ExprFuncTemplate(self, EvalFunc, OpLst):
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Val = EvalFunc()
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while self._IsOperator(OpLst):
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Op = self._Token
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try:
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Val = self.Eval(Op, Val, EvalFunc())
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except WrnExpression, Warn:
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self._WarnExcept = Warn
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Val = Warn.result
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return Val
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# A [|| B]*
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def _OrExpr(self):
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return self._ExprFuncTemplate(self._AndExpr, ["OR", "or"])
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# A [&& B]*
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def _AndExpr(self):
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return self._ExprFuncTemplate(self._NeExpr, ["AND", "and"])
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def _NeExpr(self):
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Val = self._RelExpr()
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while self._IsOperator([ "!=", "NOT", "not"]):
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Op = self._Token
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if Op in ["!", "NOT", "not"]:
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if not self._IsOperator(["IN", "in"]):
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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()
|