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CloverBootloader/BaseTools/Source/Python/Common/Expression.py
SergeySlice 02287fbb4b compatibility with Python 3.10 
Signed-off-by: SergeySlice <sergey.slice@gmail.com>
2022-02-05 21:53:39 +03:00

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## @file
# This file is used to parse and evaluate expression in directive or PCD value.
#
# Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
# SPDX-License-Identifier: BSD-2-Clause-Patent
## Import Modules
#
from __future__ import print_function
from __future__ import absolute_import
from Common.GlobalData import *
from CommonDataClass.Exceptions import BadExpression
from CommonDataClass.Exceptions import WrnExpression
from .Misc import GuidStringToGuidStructureString, ParseFieldValue,CopyDict
import Common.EdkLogger as EdkLogger
import copy
from Common.DataType import *
import sys
from random import sample
import string
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 = 'The PCD should be FeatureFlag type or FixedAtBuild type: [%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 $(TARGET).'
__ValidString = re.compile(r'[_a-zA-Z][_0-9a-zA-Z]*$')
_ReLabel = re.compile('LABEL\((\w+)\)')
_ReOffset = re.compile('OFFSET_OF\((\w+)\)')
PcdPattern = re.compile(r'[_a-zA-Z][0-9A-Za-z_]*\.[_a-zA-Z][0-9A-Za-z_]*$')
## 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", 'abc\'def\\\'ghi'
RanStr = ''.join(sample(string.ascii_letters + string.digits, 8))
String = String.replace('\\\\', RanStr).strip()
RetList = []
InSingleQuote = False
InDoubleQuote = False
Item = ''
for i, ch in enumerate(String):
if ch == '"' and not InSingleQuote:
if String[i - 1] != '\\':
InDoubleQuote = not InDoubleQuote
if not InDoubleQuote:
Item += String[i]
RetList.append(Item)
Item = ''
continue
if Item:
RetList.append(Item)
Item = ''
elif ch == "'" and not InDoubleQuote:
if String[i - 1] != '\\':
InSingleQuote = not InSingleQuote
if not InSingleQuote:
Item += String[i]
RetList.append(Item)
Item = ''
continue
if Item:
RetList.append(Item)
Item = ''
Item += String[i]
if InSingleQuote or InDoubleQuote:
raise BadExpression(ERR_STRING_TOKEN % Item)
if Item:
RetList.append(Item)
for i, ch in enumerate(RetList):
if RanStr in ch:
RetList[i] = ch.replace(RanStr,'\\\\')
return RetList
def SplitPcdValueString(String):
# There might be escaped comma in GUID() or DEVICE_PATH() or " "
# or ' ' or L' ' or L" "
RanStr = ''.join(sample(string.ascii_letters + string.digits, 8))
String = String.replace('\\\\', RanStr).strip()
RetList = []
InParenthesis = 0
InSingleQuote = False
InDoubleQuote = False
Item = ''
for i, ch in enumerate(String):
if ch == '(':
InParenthesis += 1
elif ch == ')':
if InParenthesis:
InParenthesis -= 1
else:
raise BadExpression(ERR_STRING_TOKEN % Item)
elif ch == '"' and not InSingleQuote:
if String[i-1] != '\\':
InDoubleQuote = not InDoubleQuote
elif ch == "'" and not InDoubleQuote:
if String[i-1] != '\\':
InSingleQuote = not InSingleQuote
elif ch == ',':
if InParenthesis or InSingleQuote or InDoubleQuote:
Item += String[i]
continue
elif Item:
RetList.append(Item)
Item = ''
continue
Item += String[i]
if InSingleQuote or InDoubleQuote or InParenthesis:
raise BadExpression(ERR_STRING_TOKEN % Item)
if Item:
RetList.append(Item)
for i, ch in enumerate(RetList):
if RanStr in ch:
RetList[i] = ch.replace(RanStr,'\\\\')
return RetList
def IsValidCName(Str):
return True if __ValidString.match(Str) else False
def BuildOptionValue(PcdValue, GuidDict):
if PcdValue.startswith('H'):
InputValue = PcdValue[1:]
elif PcdValue.startswith("L'") or PcdValue.startswith("'"):
InputValue = PcdValue
elif PcdValue.startswith('L'):
InputValue = 'L"' + PcdValue[1:] + '"'
else:
InputValue = PcdValue
try:
PcdValue = ValueExpressionEx(InputValue, TAB_VOID, GuidDict)(True)
except:
pass
return PcdValue
## 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:
for Pcd in gPlatformPcds:
if Pcd in String:
if Pcd not in gConditionalPcds:
gConditionalPcds.append(Pcd)
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:
Tklst = RetStr.split()
if Tklst and Tklst[-1] in {'IN', 'in'} and ExceptionList and Macro not in ExceptionList:
raise BadExpression(ERR_IN_OPERAND)
# Make sure the macro in exception list is encapsulated by double quote
# For example: DEFINE ARCH = IA32 X64
# $(ARCH) is replaced with "IA32 X64"
if ExceptionList and Macro in ExceptionList:
RetStr += '"' + Macros[Macro] + '"'
elif Macros[Macro].strip():
RetStr += Macros[Macro]
else:
RetStr += '""'
else:
RetStr += Macros[Macro]
RetStr += String[MacroEndPos+1:]
String = RetStr
MacroStartPos = String.find('$(')
StrList[i] = RetStr
return ''.join(StrList)
# transfer int to string for in/not in expression
def IntToStr(Value):
StrList = []
while Value > 0:
StrList.append(chr(Value & 0xff))
Value = Value >> 8
Value = '"' + ''.join(StrList) + '"'
return Value
SupportedInMacroList = ['TARGET', 'TOOL_CHAIN_TAG', 'ARCH', 'FAMILY']
class BaseExpression(object):
def __init__(self, *args, **kwargs):
super(BaseExpression, self).__init__()
# Check if current token matches the operators given from parameter
def _IsOperator(self, OpSet):
Idx = self._Idx
self._GetOperator()
if self._Token in OpSet:
if self._Token in self.LogicalOperators:
self._Token = self.LogicalOperators[self._Token]
return True
self._Idx = Idx
return False
class ValueExpression(BaseExpression):
# Logical operator mapping
LogicalOperators = {
'&&' : 'and', '||' : 'or',
'!' : 'not', 'AND': 'and',
'OR' : 'or' , 'NOT': 'not',
'XOR': '^' , 'xor': '^',
'EQ' : '==' , 'NE' : '!=',
'GT' : '>' , 'LT' : '<',
'GE' : '>=' , 'LE' : '<=',
'IN' : 'in'
}
NonLetterOpLst = ['+', '-', TAB_STAR, '/', '%', '&', '|', '^', '~', '<<', '>>', '!', '=', '>', '<', '?', ':']
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 \
(isinstance(Oprand1, type('')) or isinstance(Oprand2, type(''))):
raise BadExpression(ERR_STRING_EXPR % Operator)
if Operator in {'in', 'not in'}:
if not isinstance(Oprand1, type('')):
Oprand1 = IntToStr(Oprand1)
if not isinstance(Oprand2, type('')):
Oprand2 = IntToStr(Oprand2)
TypeDict = {
type(0) : 0,
# For python2 long type
type(sys.maxsize + 1) : 0,
type('') : 1,
type(True) : 2
}
EvalStr = ''
if Operator in {"!", "NOT", "not"}:
if isinstance(Oprand1, type('')):
raise BadExpression(ERR_STRING_EXPR % Operator)
EvalStr = 'not Oprand1'
elif Operator in {"~"}:
if isinstance(Oprand1, type('')):
raise BadExpression(ERR_STRING_EXPR % Operator)
EvalStr = '~ 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 not isinstance(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", "or"} 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 isinstance(Oprand1, type('')) and isinstance(Oprand2, type('')):
if ((Oprand1.startswith('L"') or Oprand1.startswith("L'")) and (not Oprand2.startswith('L"')) and (not Oprand2.startswith("L'"))) or \
(((not Oprand1.startswith('L"')) and (not Oprand1.startswith("L'"))) and (Oprand2.startswith('L"') or Oprand2.startswith("L'"))):
raise BadExpression(ERR_STRING_CMP % (Oprand1, Operator, Oprand2))
if 'in' in Operator and isinstance(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 as 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={}):
super(ValueExpression, self).__init__(self, Expression, SymbolTable)
self._NoProcess = False
if not isinstance(Expression, type('')):
self._Expr = Expression
self._NoProcess = True
return
self._Expr = ReplaceExprMacro(Expression.strip(),
SymbolTable,
SupportedInMacroList)
if not self._Expr.strip():
raise BadExpression(ERR_EMPTY_EXPR)
#
# The symbol table including PCD and macro mapping
#
self._Symb = CopyDict(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 = ''
# 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()
if RealValue and Depth == 0:
self._Token = self._Expr
if self.__IsNumberToken():
return self._Expr
Token = ''
try:
Token = self._GetToken()
except BadExpression:
pass
if isinstance(Token, type('')) and Token.startswith('{') and Token.endswith('}') and self._Idx >= self._Len:
return self._Expr
self._Idx = 0
self._Token = ''
Val = self._ConExpr()
RealVal = Val
if isinstance(Val, type('')):
if Val == 'L""':
Val = False
elif not Val:
Val = False
RealVal = '""'
elif not Val.startswith('L"') and not Val.startswith('{') and not Val.startswith("L'") and not Val.startswith("'"):
Val = True
RealVal = '"' + RealVal + '"'
# 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:])
if RealValue:
RetVal = str(RealVal)
elif Val:
RetVal = True
else:
RetVal = False
if self._WarnExcept:
self._WarnExcept.result = RetVal
raise self._WarnExcept
else:
return RetVal
# Template function to parse binary operators which have same precedence
# Expr [Operator Expr]*
def _ExprFuncTemplate(self, EvalFunc, OpSet):
Val = EvalFunc()
while self._IsOperator(OpSet):
Op = self._Token
if Op == '?':
Val2 = EvalFunc()
if self._IsOperator({':'}):
Val3 = EvalFunc()
if Val:
Val = Val2
else:
Val = Val3
continue
#
# PEP 238 -- Changing the Division Operator
# x/y to return a reasonable approximation of the mathematical result of the division ("true division")
# x//y to return the floor ("floor division")
#
if Op == '/':
Op = '//'
try:
Val = self.Eval(Op, Val, EvalFunc())
except WrnExpression as Warn:
self._WarnExcept = Warn
Val = Warn.result
return Val
# A [? B]*
def _ConExpr(self):
return self._ExprFuncTemplate(self._OrExpr, {'?', ':'})
# 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
try:
Val = self.Eval(Op, Val, self._RelExpr())
except WrnExpression as Warn:
self._WarnExcept = Warn
Val = Warn.result
return Val
# A [ > B]*
def _RelExpr(self):
return self._ExprFuncTemplate(self._ShiftExpr, {"<=", ">=", "<", ">", "LE", "GE", "LT", "GT"})
def _ShiftExpr(self):
return self._ExprFuncTemplate(self._AddExpr, {"<<", ">>"})
# A [ + B]*
def _AddExpr(self):
return self._ExprFuncTemplate(self._MulExpr, {"+", "-"})
# A [ * B]*
def _MulExpr(self):
return self._ExprFuncTemplate(self._UnaryExpr, {TAB_STAR, "/", "%"})
# [!]*A
def _UnaryExpr(self):
if self._IsOperator({"!", "NOT", "not"}):
Val = self._UnaryExpr()
try:
return self.Eval('not', Val)
except WrnExpression as Warn:
self._WarnExcept = Warn
return Warn.result
if self._IsOperator({"~"}):
Val = self._UnaryExpr()
try:
return self.Eval('~', Val)
except WrnExpression as 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._ConExpr()
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
if self._Token.startswith('"') or self._Token.startswith('L"'):
Flag = 0
for Index in range(len(self._Token)):
if self._Token[Index] in {'"'}:
if self._Token[Index - 1] == '\\':
continue
Flag += 1
if Flag == 2 and self._Token.endswith('"'):
return True
if self._Token.startswith("'") or self._Token.startswith("L'"):
Flag = 0
for Index in range(len(self._Token)):
if self._Token[Index] in {"'"}:
if self._Token[Index - 1] == '\\':
continue
Flag += 1
if Flag == 2 and self._Token.endswith("'"):
return True
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 \\\", \"
if self._Expr[Idx] == '"':
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)
#Replace escape \\\', \'
elif self._Expr[Idx] == "'":
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) or ('?' in self._Expr and 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 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 = ValueExpression(self._Symb[self._Token], self._Symb)(True, self._Depth+1)
if not isinstance(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 gHexPattern.match(self._LiteralToken):
Token = self._LiteralToken[2:]
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
elif Expr.startswith("L'"):
# Skip L
self._Idx += 1
UStr = self.__GetString()
self._Token = "L'" + UStr + "'"
return self._Token
elif Expr.startswith("'"):
UStr = self.__GetString()
self._Token = "'" + UStr + "'"
return self._Token
elif Expr.startswith('UINT'):
Re = re.compile('(?:UINT8|UINT16|UINT32|UINT64)\((.+)\)')
try:
RetValue = Re.search(Expr).group(1)
except:
raise BadExpression('Invalid Expression %s' % Expr)
Idx = self._Idx
for Ch in Expr:
self._Idx += 1
if Ch == '(':
Prefix = self._Expr[Idx:self._Idx - 1]
Idx = self._Idx
if Ch == ')':
TmpValue = self._Expr[Idx :self._Idx - 1]
TmpValue = ValueExpression(TmpValue)(True)
TmpValue = '0x%x' % int(TmpValue) if not isinstance(TmpValue, type('')) else TmpValue
break
self._Token, Size = ParseFieldValue(Prefix + '(' + TmpValue + ')')
return self._Token
self._Token = ''
if Expr:
Ch = Expr[0]
Match = gGuidPattern.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()]))(True, self._Depth+1)
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 in ['!', '~'] 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
class ValueExpressionEx(ValueExpression):
def __init__(self, PcdValue, PcdType, SymbolTable={}):
ValueExpression.__init__(self, PcdValue, SymbolTable)
self.PcdValue = PcdValue
self.PcdType = PcdType
def __call__(self, RealValue=False, Depth=0):
PcdValue = self.PcdValue
if "{CODE(" not in PcdValue:
try:
PcdValue = ValueExpression.__call__(self, RealValue, Depth)
if self.PcdType == TAB_VOID and (PcdValue.startswith("'") or PcdValue.startswith("L'")):
PcdValue, Size = ParseFieldValue(PcdValue)
PcdValueList = []
for I in range(Size):
PcdValueList.append('0x%02X'%(PcdValue & 0xff))
PcdValue = PcdValue >> 8
PcdValue = '{' + ','.join(PcdValueList) + '}'
elif self.PcdType in TAB_PCD_NUMERIC_TYPES and (PcdValue.startswith("'") or \
PcdValue.startswith('"') or PcdValue.startswith("L'") or PcdValue.startswith('L"') or PcdValue.startswith('{')):
raise BadExpression
except WrnExpression as Value:
PcdValue = Value.result
except BadExpression as Value:
if self.PcdType in TAB_PCD_NUMERIC_TYPES:
PcdValue = PcdValue.strip()
if PcdValue.startswith('{') and PcdValue.endswith('}'):
PcdValue = SplitPcdValueString(PcdValue[1:-1])
if isinstance(PcdValue, type([])):
TmpValue = 0
Size = 0
ValueType = ''
for Item in PcdValue:
Item = Item.strip()
if Item.startswith(TAB_UINT8):
ItemSize = 1
ValueType = TAB_UINT8
elif Item.startswith(TAB_UINT16):
ItemSize = 2
ValueType = TAB_UINT16
elif Item.startswith(TAB_UINT32):
ItemSize = 4
ValueType = TAB_UINT32
elif Item.startswith(TAB_UINT64):
ItemSize = 8
ValueType = TAB_UINT64
elif Item[0] in {'"', "'", 'L'}:
ItemSize = 0
ValueType = TAB_VOID
else:
ItemSize = 0
ValueType = TAB_UINT8
Item = ValueExpressionEx(Item, ValueType, self._Symb)(True)
if ItemSize == 0:
try:
tmpValue = int(Item, 0)
if tmpValue > 255:
raise BadExpression("Byte array number %s should less than 0xFF." % Item)
except BadExpression as Value:
raise BadExpression(Value)
except ValueError:
pass
ItemValue, ItemSize = ParseFieldValue(Item)
else:
ItemValue = ParseFieldValue(Item)[0]
if isinstance(ItemValue, type('')):
ItemValue = int(ItemValue, 0)
TmpValue = (ItemValue << (Size * 8)) | TmpValue
Size = Size + ItemSize
else:
try:
TmpValue, Size = ParseFieldValue(PcdValue)
except BadExpression as Value:
raise BadExpression("Type: %s, Value: %s, %s" % (self.PcdType, PcdValue, Value))
if isinstance(TmpValue, type('')):
try:
TmpValue = int(TmpValue)
except:
raise BadExpression(Value)
else:
PcdValue = '0x%0{}X'.format(Size) % (TmpValue)
if TmpValue < 0:
raise BadExpression('Type %s PCD Value is negative' % self.PcdType)
if self.PcdType == TAB_UINT8 and Size > 1:
raise BadExpression('Type %s PCD Value Size is Larger than 1 byte' % self.PcdType)
if self.PcdType == TAB_UINT16 and Size > 2:
raise BadExpression('Type %s PCD Value Size is Larger than 2 byte' % self.PcdType)
if self.PcdType == TAB_UINT32 and Size > 4:
raise BadExpression('Type %s PCD Value Size is Larger than 4 byte' % self.PcdType)
if self.PcdType == TAB_UINT64 and Size > 8:
raise BadExpression('Type %s PCD Value Size is Larger than 8 byte' % self.PcdType)
else:
try:
TmpValue = int(PcdValue)
TmpList = []
if TmpValue.bit_length() == 0:
PcdValue = '{0x00}'
else:
for I in range((TmpValue.bit_length() + 7) // 8):
TmpList.append('0x%02x' % ((TmpValue >> I * 8) & 0xff))
PcdValue = '{' + ', '.join(TmpList) + '}'
except:
if PcdValue.strip().startswith('{'):
PcdValueList = SplitPcdValueString(PcdValue.strip()[1:-1])
LabelDict = {}
NewPcdValueList = []
LabelOffset = 0
for Item in PcdValueList:
# compute byte offset of every LABEL
LabelList = _ReLabel.findall(Item)
Item = _ReLabel.sub('', Item)
Item = Item.strip()
if LabelList:
for Label in LabelList:
if not IsValidCName(Label):
raise BadExpression('%s is not a valid c variable name' % Label)
if Label not in LabelDict:
LabelDict[Label] = str(LabelOffset)
if Item.startswith(TAB_UINT8):
LabelOffset = LabelOffset + 1
elif Item.startswith(TAB_UINT16):
LabelOffset = LabelOffset + 2
elif Item.startswith(TAB_UINT32):
LabelOffset = LabelOffset + 4
elif Item.startswith(TAB_UINT64):
LabelOffset = LabelOffset + 8
else:
try:
ItemValue, ItemSize = ParseFieldValue(Item)
LabelOffset = LabelOffset + ItemSize
except:
LabelOffset = LabelOffset + 1
for Item in PcdValueList:
# for LABEL parse
Item = Item.strip()
try:
Item = _ReLabel.sub('', Item)
except:
pass
try:
OffsetList = _ReOffset.findall(Item)
except:
pass
# replace each offset, except errors
for Offset in OffsetList:
try:
Item = Item.replace('OFFSET_OF({})'.format(Offset), LabelDict[Offset])
except:
raise BadExpression('%s not defined' % Offset)
NewPcdValueList.append(Item)
AllPcdValueList = []
for Item in NewPcdValueList:
Size = 0
ValueStr = ''
TokenSpaceGuidName = ''
if Item.startswith(TAB_GUID) and Item.endswith(')'):
try:
TokenSpaceGuidName = re.search('GUID\((\w+)\)', Item).group(1)
except:
pass
if TokenSpaceGuidName and TokenSpaceGuidName in self._Symb:
Item = 'GUID(' + self._Symb[TokenSpaceGuidName] + ')'
elif TokenSpaceGuidName:
raise BadExpression('%s not found in DEC file' % TokenSpaceGuidName)
Item, Size = ParseFieldValue(Item)
for Index in range(0, Size):
ValueStr = '0x%02X' % (int(Item) & 255)
Item >>= 8
AllPcdValueList.append(ValueStr)
continue
elif Item.startswith('DEVICE_PATH') and Item.endswith(')'):
Item, Size = ParseFieldValue(Item)
AllPcdValueList.append(Item[1:-1])
continue
else:
ValueType = ""
if Item.startswith(TAB_UINT8):
ItemSize = 1
ValueType = TAB_UINT8
elif Item.startswith(TAB_UINT16):
ItemSize = 2
ValueType = TAB_UINT16
elif Item.startswith(TAB_UINT32):
ItemSize = 4
ValueType = TAB_UINT32
elif Item.startswith(TAB_UINT64):
ItemSize = 8
ValueType = TAB_UINT64
else:
ItemSize = 0
if ValueType:
TmpValue = ValueExpressionEx(Item, ValueType, self._Symb)(True)
else:
TmpValue = ValueExpressionEx(Item, self.PcdType, self._Symb)(True)
Item = '0x%x' % TmpValue if not isinstance(TmpValue, type('')) else TmpValue
if ItemSize == 0:
ItemValue, ItemSize = ParseFieldValue(Item)
if Item[0] not in {'"', 'L', '{'} and ItemSize > 1:
raise BadExpression("Byte array number %s should less than 0xFF." % Item)
else:
ItemValue = ParseFieldValue(Item)[0]
for I in range(0, ItemSize):
ValueStr = '0x%02X' % (int(ItemValue) & 255)
ItemValue >>= 8
AllPcdValueList.append(ValueStr)
Size += ItemSize
if Size > 0:
PcdValue = '{' + ','.join(AllPcdValueList) + '}'
else:
raise BadExpression("Type: %s, Value: %s, %s"%(self.PcdType, PcdValue, Value))
if PcdValue == 'True':
PcdValue = '1'
if PcdValue == 'False':
PcdValue = '0'
if RealValue:
return PcdValue
if __name__ == '__main__':
pass
while True:
input = raw_input('Input expr: ')
if input in 'qQ':
break
try:
print(ValueExpression(input)(True))
print(ValueExpression(input)(False))
except WrnExpression as Ex:
print(Ex.result)
print(str(Ex))
except Exception as Ex:
print(str(Ex))
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