b3e94a0617
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")
Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Zhiju.Fan <zhijux.fan@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>
1061 lines
44 KiB
Python
1061 lines
44 KiB
Python
## @file
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# This file is used to parse and evaluate expression in directive or PCD value.
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#
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# Copyright (c) 2011 - 2018, 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 __future__ import print_function
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from __future__ import absolute_import
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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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from .Misc import GuidStringToGuidStructureString, ParseFieldValue,CopyDict
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import Common.EdkLogger as EdkLogger
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import copy
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from Common.DataType import *
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import sys
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from random import sample
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import string
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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 = 'The PCD should be FeatureFlag type or FixedAtBuild type: [%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 $(TARGET).'
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__ValidString = re.compile(r'[_a-zA-Z][_0-9a-zA-Z]*$')
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_ReLabel = re.compile('LABEL\((\w+)\)')
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_ReOffset = re.compile('OFFSET_OF\((\w+)\)')
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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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## SplitString
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# Split string to list according double quote
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# For example: abc"de\"f"ghi"jkl"mn will be: ['abc', '"de\"f"', 'ghi', '"jkl"', 'mn']
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#
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def SplitString(String):
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# There might be escaped quote: "abc\"def\\\"ghi", 'abc\'def\\\'ghi'
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RanStr = ''.join(sample(string.ascii_letters + string.digits, 8))
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String = String.replace('\\\\', RanStr).strip()
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RetList = []
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InSingleQuote = False
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InDoubleQuote = False
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Item = ''
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for i, ch in enumerate(String):
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if ch == '"' and not InSingleQuote:
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if String[i - 1] != '\\':
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InDoubleQuote = not InDoubleQuote
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if not InDoubleQuote:
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Item += String[i]
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RetList.append(Item)
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Item = ''
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continue
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if Item:
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RetList.append(Item)
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Item = ''
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elif ch == "'" and not InDoubleQuote:
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if String[i - 1] != '\\':
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InSingleQuote = not InSingleQuote
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if not InSingleQuote:
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Item += String[i]
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RetList.append(Item)
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Item = ''
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continue
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if Item:
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RetList.append(Item)
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Item = ''
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Item += String[i]
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if InSingleQuote or InDoubleQuote:
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raise BadExpression(ERR_STRING_TOKEN % Item)
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if Item:
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RetList.append(Item)
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for i, ch in enumerate(RetList):
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if RanStr in ch:
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RetList[i] = ch.replace(RanStr,'\\\\')
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return RetList
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def SplitPcdValueString(String):
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# There might be escaped comma in GUID() or DEVICE_PATH() or " "
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# or ' ' or L' ' or L" "
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RanStr = ''.join(sample(string.ascii_letters + string.digits, 8))
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String = String.replace('\\\\', RanStr).strip()
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RetList = []
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InParenthesis = 0
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InSingleQuote = False
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InDoubleQuote = False
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Item = ''
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for i, ch in enumerate(String):
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if ch == '(':
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InParenthesis += 1
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elif ch == ')':
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if InParenthesis:
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InParenthesis -= 1
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else:
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raise BadExpression(ERR_STRING_TOKEN % Item)
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elif ch == '"' and not InSingleQuote:
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if String[i-1] != '\\':
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InDoubleQuote = not InDoubleQuote
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elif ch == "'" and not InDoubleQuote:
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if String[i-1] != '\\':
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InSingleQuote = not InSingleQuote
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elif ch == ',':
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if InParenthesis or InSingleQuote or InDoubleQuote:
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Item += String[i]
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continue
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elif Item:
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RetList.append(Item)
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Item = ''
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continue
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Item += String[i]
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if InSingleQuote or InDoubleQuote or InParenthesis:
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raise BadExpression(ERR_STRING_TOKEN % Item)
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if Item:
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RetList.append(Item)
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for i, ch in enumerate(RetList):
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if RanStr in ch:
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RetList[i] = ch.replace(RanStr,'\\\\')
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return RetList
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def IsValidCName(Str):
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return True if __ValidString.match(Str) else False
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def BuildOptionValue(PcdValue, GuidDict):
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if PcdValue.startswith('H'):
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InputValue = PcdValue[1:]
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elif PcdValue.startswith("L'") or PcdValue.startswith("'"):
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InputValue = PcdValue
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elif PcdValue.startswith('L'):
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InputValue = 'L"' + PcdValue[1:] + '"'
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else:
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InputValue = PcdValue
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try:
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PcdValue = ValueExpressionEx(InputValue, TAB_VOID, GuidDict)(True)
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except:
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pass
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return PcdValue
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## ReplaceExprMacro
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#
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def ReplaceExprMacro(String, Macros, ExceptionList = None):
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StrList = SplitString(String)
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for i, String in enumerate(StrList):
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InQuote = False
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if String.startswith('"'):
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InQuote = True
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MacroStartPos = String.find('$(')
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if MacroStartPos < 0:
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for Pcd in gPlatformPcds:
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if Pcd in String:
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if Pcd not in gConditionalPcds:
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gConditionalPcds.append(Pcd)
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continue
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RetStr = ''
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while MacroStartPos >= 0:
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RetStr = String[0:MacroStartPos]
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MacroEndPos = String.find(')', MacroStartPos)
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if MacroEndPos < 0:
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raise BadExpression(ERR_MACRO_TOKEN % String[MacroStartPos:])
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Macro = String[MacroStartPos+2:MacroEndPos]
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if Macro not in Macros:
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# From C reference manual:
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# If an undefined macro name appears in the constant-expression of
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# !if or !elif, it is replaced by the integer constant 0.
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RetStr += '0'
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elif not InQuote:
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Tklst = RetStr.split()
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if Tklst and Tklst[-1] in {'IN', 'in'} and ExceptionList and Macro not in ExceptionList:
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raise BadExpression(ERR_IN_OPERAND)
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# Make sure the macro in exception list is encapsulated by double quote
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# For example: DEFINE ARCH = IA32 X64
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# $(ARCH) is replaced with "IA32 X64"
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if ExceptionList and Macro in ExceptionList:
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RetStr += '"' + Macros[Macro] + '"'
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elif Macros[Macro].strip():
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RetStr += Macros[Macro]
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else:
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RetStr += '""'
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else:
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RetStr += Macros[Macro]
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RetStr += String[MacroEndPos+1:]
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String = RetStr
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MacroStartPos = String.find('$(')
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StrList[i] = RetStr
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return ''.join(StrList)
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# transfer int to string for in/not in expression
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def IntToStr(Value):
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StrList = []
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while Value > 0:
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StrList.append(chr(Value & 0xff))
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Value = Value >> 8
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Value = '"' + ''.join(StrList) + '"'
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return Value
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SupportedInMacroList = ['TARGET', 'TOOL_CHAIN_TAG', 'ARCH', 'FAMILY']
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class BaseExpression(object):
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def __init__(self, *args, **kwargs):
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super(BaseExpression, self).__init__()
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# Check if current token matches the operators given from parameter
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def _IsOperator(self, OpSet):
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Idx = self._Idx
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self._GetOperator()
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if self._Token in OpSet:
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if self._Token in self.LogicalOperators:
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self._Token = self.LogicalOperators[self._Token]
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return True
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self._Idx = Idx
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return False
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class ValueExpression(BaseExpression):
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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 = ['+', '-', TAB_STAR, '/', '%', '&', '|', '^', '~', '<<', '>>', '!', '=', '>', '<', '?', ':']
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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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@staticmethod
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def Eval(Operator, Oprand1, Oprand2 = None):
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WrnExp = None
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if Operator not in {"==", "!=", ">=", "<=", ">", "<", "in", "not in"} and \
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(isinstance(Oprand1, type('')) or isinstance(Oprand2, type(''))):
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raise BadExpression(ERR_STRING_EXPR % Operator)
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if Operator in {'in', 'not in'}:
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if not isinstance(Oprand1, type('')):
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Oprand1 = IntToStr(Oprand1)
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if not isinstance(Oprand2, type('')):
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Oprand2 = IntToStr(Oprand2)
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TypeDict = {
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type(0) : 0,
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# For python2 long type
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type(sys.maxsize + 1) : 0,
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type('') : 1,
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type(True) : 2
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}
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EvalStr = ''
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if Operator in {"!", "NOT", "not"}:
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if isinstance(Oprand1, type('')):
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raise BadExpression(ERR_STRING_EXPR % Operator)
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EvalStr = 'not Oprand1'
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elif Operator in {"~"}:
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if isinstance(Oprand1, type('')):
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raise BadExpression(ERR_STRING_EXPR % Operator)
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EvalStr = '~ Oprand1'
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else:
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if Operator in {"+", "-"} and (type(True) in {type(Oprand1), type(Oprand2)}):
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# Boolean in '+'/'-' will be evaluated but raise warning
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WrnExp = WrnExpression(WRN_BOOL_EXPR)
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elif type('') in {type(Oprand1), type(Oprand2)} and not isinstance(Oprand1, type(Oprand2)):
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# == between string and number/boolean will always return False, != return True
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if Operator == "==":
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WrnExp = WrnExpression(WRN_EQCMP_STR_OTHERS)
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WrnExp.result = False
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raise WrnExp
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elif Operator == "!=":
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WrnExp = WrnExpression(WRN_NECMP_STR_OTHERS)
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WrnExp.result = True
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raise WrnExp
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else:
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raise BadExpression(ERR_RELCMP_STR_OTHERS % Operator)
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elif TypeDict[type(Oprand1)] != TypeDict[type(Oprand2)]:
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if Operator in {"==", "!=", ">=", "<=", ">", "<"} and set((TypeDict[type(Oprand1)], TypeDict[type(Oprand2)])) == set((TypeDict[type(True)], TypeDict[type(0)])):
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# comparison between number and boolean is allowed
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pass
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elif Operator in {'&', '|', '^', "and", "or"} and set((TypeDict[type(Oprand1)], TypeDict[type(Oprand2)])) == set((TypeDict[type(True)], TypeDict[type(0)])):
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# bitwise and logical operation between number and boolean is allowed
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pass
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else:
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raise BadExpression(ERR_EXPR_TYPE)
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if isinstance(Oprand1, type('')) and isinstance(Oprand2, type('')):
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if ((Oprand1.startswith('L"') or Oprand1.startswith("L'")) and (not Oprand2.startswith('L"')) and (not Oprand2.startswith("L'"))) or \
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(((not Oprand1.startswith('L"')) and (not Oprand1.startswith("L'"))) and (Oprand2.startswith('L"') or Oprand2.startswith("L'"))):
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raise BadExpression(ERR_STRING_CMP % (Oprand1, Operator, Oprand2))
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if 'in' in Operator and isinstance(Oprand2, type('')):
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Oprand2 = Oprand2.split()
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EvalStr = 'Oprand1 ' + Operator + ' Oprand2'
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# Local symbols used by built in eval function
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Dict = {
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'Oprand1' : Oprand1,
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'Oprand2' : Oprand2
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}
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try:
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Val = eval(EvalStr, {}, Dict)
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except Exception as Excpt:
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raise BadExpression(str(Excpt))
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if Operator in {'and', 'or'}:
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if Val:
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Val = True
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else:
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Val = False
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if WrnExp:
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WrnExp.result = Val
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raise WrnExp
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return Val
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def __init__(self, Expression, SymbolTable={}):
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super(ValueExpression, self).__init__(self, Expression, SymbolTable)
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self._NoProcess = False
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if not isinstance(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 = ReplaceExprMacro(Expression.strip(),
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SymbolTable,
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SupportedInMacroList)
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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 = CopyDict(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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# 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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if RealValue and Depth == 0:
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self._Token = self._Expr
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if self.__IsNumberToken():
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return self._Expr
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Token = ''
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try:
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Token = self._GetToken()
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except BadExpression:
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pass
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if isinstance(Token, type('')) and Token.startswith('{') and Token.endswith('}') and self._Idx >= self._Len:
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return self._Expr
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self._Idx = 0
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self._Token = ''
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Val = self._ConExpr()
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RealVal = Val
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if isinstance(Val, type('')):
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if Val == 'L""':
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Val = False
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elif not Val:
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Val = False
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RealVal = '""'
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elif not Val.startswith('L"') and not Val.startswith('{') and not Val.startswith("L'") and not Val.startswith("'"):
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Val = True
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RealVal = '"' + RealVal + '"'
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# The expression has been parsed, but the end of expression is not reached
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# It means the rest does not comply EBNF of <Expression>
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if self._Idx != self._Len:
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raise BadExpression(ERR_SNYTAX % self._Expr[self._Idx:])
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|
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if RealValue:
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RetVal = str(RealVal)
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elif Val:
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RetVal = True
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else:
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RetVal = False
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if self._WarnExcept:
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self._WarnExcept.result = RetVal
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raise self._WarnExcept
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else:
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return RetVal
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|
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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, OpSet):
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Val = EvalFunc()
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while self._IsOperator(OpSet):
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Op = self._Token
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if Op == '?':
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Val2 = EvalFunc()
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if self._IsOperator({':'}):
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Val3 = EvalFunc()
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if Val:
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Val = Val2
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else:
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Val = Val3
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continue
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#
|
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# PEP 238 -- Changing the Division Operator
|
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# x/y to return a reasonable approximation of the mathematical result of the division ("true division")
|
|
# x//y to return the floor ("floor division")
|
|
#
|
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if Op == '/':
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Op = '//'
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try:
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Val = self.Eval(Op, Val, EvalFunc())
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except WrnExpression as Warn:
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self._WarnExcept = Warn
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Val = Warn.result
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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))
|