mirror of https://github.com/acidanthera/audk.git
556 lines
20 KiB
Python
556 lines
20 KiB
Python
|
## @file
|
||
|
|
# This file is used to parse and evaluate expression in directive or PCD value.
|
||
|
|
#
|
||
|
|
# Copyright (c) 2011, 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 SymbolNotFound
|
||
|
|
from CommonDataClass.Exceptions import WrnExpression
|
||
|
|
from Misc import GuidStringToGuidStructureString
|
||
|
|
|
||
|
|
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].'
|
||
|
|
|
||
|
|
## SplitString
|
||
|
|
# Split string to list according double quote
|
||
|
|
# For example: abc"de\"f"ghi"jkl"mn will be: ['abc', '"de\"f"', 'ghi', '"jkl"', 'mn']
|
||
|
|
#
|
||
|
|
def SplitString(String):
|
||
|
|
# There might be escaped quote: "abc\"def\\\"ghi"
|
||
|
|
Str = String.replace('\\\\', '//').replace('\\\"', '\\\'')
|
||
|
|
RetList = []
|
||
|
|
InQuote = False
|
||
|
|
Item = ''
|
||
|
|
for i, ch in enumerate(Str):
|
||
|
|
if ch == '"':
|
||
|
|
InQuote = not InQuote
|
||
|
|
if not InQuote:
|
||
|
|
Item += String[i]
|
||
|
|
RetList.append(Item)
|
||
|
|
Item = ''
|
||
|
|
continue
|
||
|
|
if Item:
|
||
|
|
RetList.append(Item)
|
||
|
|
Item = ''
|
||
|
|
Item += String[i]
|
||
|
|
if InQuote:
|
||
|
|
raise BadExpression(ERR_STRING_TOKEN % Item)
|
||
|
|
if Item:
|
||
|
|
RetList.append(Item)
|
||
|
|
return RetList
|
||
|
|
|
||
|
|
## ReplaceExprMacro
|
||
|
|
#
|
||
|
|
def ReplaceExprMacro(String, Macros, ExceptionList = None):
|
||
|
|
StrList = SplitString(String)
|
||
|
|
for i, String in enumerate(StrList):
|
||
|
|
InQuote = False
|
||
|
|
if String.startswith('"'):
|
||
|
|
InQuote = True
|
||
|
|
MacroStartPos = String.find('$(')
|
||
|
|
if MacroStartPos < 0:
|
||
|
|
continue
|
||
|
|
RetStr = ''
|
||
|
|
while MacroStartPos >= 0:
|
||
|
|
RetStr = String[0:MacroStartPos]
|
||
|
|
MacroEndPos = String.find(')', MacroStartPos)
|
||
|
|
if MacroEndPos < 0:
|
||
|
|
raise BadExpression(ERR_MACRO_TOKEN % String[MacroStartPos:])
|
||
|
|
Macro = String[MacroStartPos+2:MacroEndPos]
|
||
|
|
if Macro not in Macros:
|
||
|
|
# From C reference manual:
|
||
|
|
# If an undefined macro name appears in the constant-expression of
|
||
|
|
# !if or !elif, it is replaced by the integer constant 0.
|
||
|
|
RetStr += '0'
|
||
|
|
elif not InQuote and ExceptionList and Macro in ExceptionList:
|
||
|
|
# Make sure the macro in exception list is encapsulated by double quote
|
||
|
|
# For example: DEFINE ARCH = IA32 X64
|
||
|
|
# $(ARCH) is replaced with "IA32 X64"
|
||
|
|
RetStr += '"' + Macros[Macro] + '"'
|
||
|
|
else:
|
||
|
|
if Macros[Macro].strip() != "":
|
||
|
|
RetStr += Macros[Macro]
|
||
|
|
else:
|
||
|
|
RetStr += '""'
|
||
|
|
RetStr += String[MacroEndPos+1:]
|
||
|
|
String = RetStr
|
||
|
|
MacroStartPos = String.find('$(')
|
||
|
|
StrList[i] = RetStr
|
||
|
|
return ''.join(StrList)
|
||
|
|
|
||
|
|
class ValueExpression(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}')
|
||
|
|
|
||
|
|
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)"
|
||
|
|
")")
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def Eval(Operator, Oprand1, Oprand2 = None):
|
||
|
|
WrnExp = None
|
||
|
|
|
||
|
|
if Operator not in ["==", "!=", ">=", "<=", ">", "<", "in", "not in"] and \
|
||
|
|
(type(Oprand1) == type('') or type(Oprand2) == type('')):
|
||
|
|
raise BadExpression(ERR_STRING_EXPR % Operator)
|
||
|
|
|
||
|
|
TypeDict = {
|
||
|
|
type(0) : 0,
|
||
|
|
type(0L) : 0,
|
||
|
|
type('') : 1,
|
||
|
|
type(True) : 2
|
||
|
|
}
|
||
|
|
|
||
|
|
EvalStr = ''
|
||
|
|
if Operator in ["!", "NOT", "not"]:
|
||
|
|
if type(Oprand1) == type(''):
|
||
|
|
raise BadExpression(ERR_STRING_EXPR % Operator)
|
||
|
|
EvalStr = 'not Oprand1'
|
||
|
|
else:
|
||
|
|
if Operator in ["+", "-"] and (type(True) in [type(Oprand1), type(Oprand2)]):
|
||
|
|
# Boolean in '+'/'-' will be evaluated but raise warning
|
||
|
|
WrnExp = WrnExpression(WRN_BOOL_EXPR)
|
||
|
|
elif type('') in [type(Oprand1), type(Oprand2)] and type(Oprand1)!= type(Oprand2):
|
||
|
|
# == between string and number/boolean will always return False, != return True
|
||
|
|
if Operator == "==":
|
||
|
|
WrnExp = WrnExpression(WRN_EQCMP_STR_OTHERS)
|
||
|
|
WrnExp.result = False
|
||
|
|
raise WrnExp
|
||
|
|
elif Operator == "!=":
|
||
|
|
WrnExp = WrnExpression(WRN_NECMP_STR_OTHERS)
|
||
|
|
WrnExp.result = True
|
||
|
|
raise WrnExp
|
||
|
|
else:
|
||
|
|
raise BadExpression(ERR_RELCMP_STR_OTHERS % Operator)
|
||
|
|
elif TypeDict[type(Oprand1)] != TypeDict[type(Oprand2)]:
|
||
|
|
if Operator in ["==", "!=", ">=", "<=", ">", "<"] and set((TypeDict[type(Oprand1)], TypeDict[type(Oprand2)])) == set((TypeDict[type(True)], TypeDict[type(0)])):
|
||
|
|
# comparison between number and boolean is allowed
|
||
|
|
pass
|
||
|
|
elif Operator in ['&', '|', '^', "&&", "||"] and set((TypeDict[type(Oprand1)], TypeDict[type(Oprand2)])) == set((TypeDict[type(True)], TypeDict[type(0)])):
|
||
|
|
# bitwise and logical operation between number and boolean is allowed
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
raise BadExpression(ERR_EXPR_TYPE)
|
||
|
|
if type(Oprand1) == type('') and type(Oprand2) == type(''):
|
||
|
|
if (Oprand1.startswith('L"') and not Oprand2.startswith('L"')) or \
|
||
|
|
(not Oprand1.startswith('L"') and Oprand2.startswith('L"')):
|
||
|
|
raise BadExpression(ERR_STRING_CMP % (Oprand1, Operator, Oprand2))
|
||
|
|
if 'in' in Operator and type(Oprand2) == type(''):
|
||
|
|
Oprand2 = Oprand2.split()
|
||
|
|
EvalStr = 'Oprand1 ' + Operator + ' Oprand2'
|
||
|
|
|
||
|
|
# Local symbols used by built in eval function
|
||
|
|
Dict = {
|
||
|
|
'Oprand1' : Oprand1,
|
||
|
|
'Oprand2' : Oprand2
|
||
|
|
}
|
||
|
|
try:
|
||
|
|
Val = eval(EvalStr, {}, Dict)
|
||
|
|
except Exception, Excpt:
|
||
|
|
raise BadExpression(str(Excpt))
|
||
|
|
|
||
|
|
if Operator in ['and', 'or']:
|
||
|
|
if Val:
|
||
|
|
Val = True
|
||
|
|
else:
|
||
|
|
Val = False
|
||
|
|
|
||
|
|
if WrnExp:
|
||
|
|
WrnExp.result = Val
|
||
|
|
raise WrnExp
|
||
|
|
return Val
|
||
|
|
|
||
|
|
def __init__(self, Expression, SymbolTable={}):
|
||
|
|
self._NoProcess = False
|
||
|
|
if type(Expression) != type(''):
|
||
|
|
self._Expr = Expression
|
||
|
|
self._NoProcess = True
|
||
|
|
return
|
||
|
|
|
||
|
|
self._Expr = ReplaceExprMacro(Expression.strip(),
|
||
|
|
SymbolTable,
|
||
|
|
['TARGET', 'TOOL_CHAIN_TAG', 'ARCH'])
|
||
|
|
|
||
|
|
if not self._Expr.strip():
|
||
|
|
self._NoProcess = True
|
||
|
|
return
|
||
|
|
|
||
|
|
#
|
||
|
|
# 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 = ''
|
||
|
|
|
||
|
|
# Literal token without any conversion
|
||
|
|
self._LiteralToken = ''
|
||
|
|
|
||
|
|
# Public entry for this class
|
||
|
|
def __call__(self):
|
||
|
|
if self._NoProcess:
|
||
|
|
return self._Expr
|
||
|
|
|
||
|
|
Val = self._OrExpr()
|
||
|
|
if type(Val) == type('') and Val == 'L""':
|
||
|
|
Val = ''
|
||
|
|
|
||
|
|
# The expression has been parsed, but the end of expression is not reached
|
||
|
|
# It means the rest does not comply EBNF of <Expression>
|
||
|
|
if self._Idx != self._Len:
|
||
|
|
raise BadExpression(ERR_SNYTAX % self._Expr[self._Idx:])
|
||
|
|
|
||
|
|
return Val
|
||
|
|
|
||
|
|
# 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
|
||
|
|
Val = self.Eval(Op, Val, EvalFunc())
|
||
|
|
return Val
|
||
|
|
|
||
|
|
# A [|| B]*
|
||
|
|
def _OrExpr(self):
|
||
|
|
return self._ExprFuncTemplate(self._AndExpr, ["OR", "or", "||"])
|
||
|
|
|
||
|
|
# A [&& B]*
|
||
|
|
def _AndExpr(self):
|
||
|
|
return self._ExprFuncTemplate(self._BitOr, ["AND", "and", "&&"])
|
||
|
|
|
||
|
|
# A [ | B]*
|
||
|
|
def _BitOr(self):
|
||
|
|
return self._ExprFuncTemplate(self._BitXor, ["|"])
|
||
|
|
|
||
|
|
# A [ ^ B]*
|
||
|
|
def _BitXor(self):
|
||
|
|
return self._ExprFuncTemplate(self._BitAnd, ["XOR", "xor", "^"])
|
||
|
|
|
||
|
|
# A [ & B]*
|
||
|
|
def _BitAnd(self):
|
||
|
|
return self._ExprFuncTemplate(self._EqExpr, ["&"])
|
||
|
|
|
||
|
|
# A [ == B]*
|
||
|
|
def _EqExpr(self):
|
||
|
|
Val = self._RelExpr()
|
||
|
|
while self._IsOperator(["==", "!=", "EQ", "NE", "IN", "in", "!", "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
|
||
|
|
Val = self.Eval(Op, Val, self._RelExpr())
|
||
|
|
return Val
|
||
|
|
|
||
|
|
# A [ > B]*
|
||
|
|
def _RelExpr(self):
|
||
|
|
return self._ExprFuncTemplate(self._AddExpr, ["<=", ">=", "<", ">", "LE", "GE", "LT", "GT"])
|
||
|
|
|
||
|
|
# A [ + B]*
|
||
|
|
def _AddExpr(self):
|
||
|
|
return self._ExprFuncTemplate(self._UnaryExpr, ["+", "-"])
|
||
|
|
|
||
|
|
# [!]*A
|
||
|
|
def _UnaryExpr(self):
|
||
|
|
if self._IsOperator(["!", "NOT", "not"]):
|
||
|
|
Val = self._UnaryExpr()
|
||
|
|
return self.Eval('not', Val)
|
||
|
|
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:
|
||
|
|
raise SymbolNotFound(ERR_PCD_RESOLVE % self._Token)
|
||
|
|
self._Token = ValueExpression(self._Symb[self._Token], self._Symb)()
|
||
|
|
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
|
||
|
|
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 = ValueExpression(GuidStringToGuidStructureString(Expr[0:Match.end()]))()
|
||
|
|
return self._Token
|
||
|
|
elif self.__IsIdChar(Ch):
|
||
|
|
return self.__GetIdToken()
|
||
|
|
elif Ch == '"':
|
||
|
|
return self.__GetString()
|
||
|
|
elif Ch == '{':
|
||
|
|
return self.__GetArray()
|
||
|
|
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 in ['!=', '!']:
|
||
|
|
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
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
pass
|
||
|
|
|
||
|
|
|