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Diffstat (limited to 'parameter/RuleParser.cpp')
| -rw-r--r-- | parameter/RuleParser.cpp | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/parameter/RuleParser.cpp b/parameter/RuleParser.cpp new file mode 100644 index 0000000..b72556b --- /dev/null +++ b/parameter/RuleParser.cpp @@ -0,0 +1,252 @@ +/* <auto_header> + * <FILENAME> + * + * INTEL CONFIDENTIAL + * Copyright © 2011 Intel + * Corporation All Rights Reserved. + * + * The source code contained or described herein and all documents related to + * the source code ("Material") are owned by Intel Corporation or its suppliers + * or licensors. Title to the Material remains with Intel Corporation or its + * suppliers and licensors. The Material contains trade secrets and proprietary + * and confidential information of Intel or its suppliers and licensors. The + * Material is protected by worldwide copyright and trade secret laws and + * treaty provisions. No part of the Material may be used, copied, reproduced, + * modified, published, uploaded, posted, transmitted, distributed, or + * disclosed in any way without Intel’s prior express written permission. + * + * No license under any patent, copyright, trade secret or other intellectual + * property right is granted to or conferred upon you by disclosure or delivery + * of the Materials, either expressly, by implication, inducement, estoppel or + * otherwise. Any license under such intellectual property rights must be + * express and approved by Intel in writing. + * + * AUTHOR: Patrick Benavoli (patrickx.benavoli@intel.com) + * CREATED: 2011-06-01 + * UPDATED: 2011-07-27 + * + * + * </auto_header> + */ +#include "RuleParser.h" +#include "CompoundRule.h" +#include "SelectionCriterionRule.h" +#include <assert.h> + +// Matches +const char* CRuleParser::_acDelimiters[CRuleParser::ENbStatuses] = { + "{", // EInit + "{} ", // EBeginCompoundRule + ",}", // EEndCompoundRule + ",}", // ECriterionRule + "{ ", // EContinue + "" // EDone +}; + +CRuleParser::CRuleParser(const string& strApplicationRule, const CSelectionCriteriaDefinition* pSelectionCriteriaDefinition) : + _strApplicationRule(strApplicationRule), + _pSelectionCriteriaDefinition(pSelectionCriteriaDefinition), + _uiCurrentPos(0), + _uiCurrentDeepness(0), + _eStatus(CRuleParser::EInit), + _pRootRule(NULL) +{ +} + +CRuleParser::~CRuleParser() +{ + delete _pRootRule; +} + +// Parse +bool CRuleParser::parse(CCompoundRule* pParentRule, string& strError) +{ + while (true) { + // Iterate till next relevant delimiter + if (!iterate(strError)) { + + return false; + } + switch(_eStatus) { + case EBeginCompoundRule: { + + // Create new compound rule + CCompoundRule* pCompoundRule = new CCompoundRule; + + // Parse + if (!pCompoundRule->parse(*this, strError)) { + + delete pCompoundRule; + + return false; + } + // Parent rule creation context? + if (pParentRule) { + + // Chain + pParentRule->addChild(pCompoundRule); + } else { + // Root rule + delete _pRootRule; + _pRootRule = pCompoundRule; + } + // Parse + if (!parse(pCompoundRule, strError)) { + + return false; + } + // Go on + break; + } + case EEndCompoundRule: + return true; + case EContinue: + // Seek for new rule + break; + case ECriterionRule: { + // Create new criterion rule + CSelectionCriterionRule* pCriterionRule = new CSelectionCriterionRule; + + // Parse + if (!pCriterionRule->parse(*this, strError)) { + + delete pCriterionRule; + + return false; + } + + // Chain + pParentRule->addChild(pCriterionRule); + + // Go on + break; + } + case EDone: + return true; + default: + assert(0); + return false; + } + } + + return true; +} + +// Iterate +bool CRuleParser::iterate(string& strError) +{ + string::size_type iDelimiter; + + assert(_uiCurrentPos <= _strApplicationRule.length()); + + // Consume spaces + if ((iDelimiter = _strApplicationRule.find_first_not_of(" ", _uiCurrentPos)) != string::npos) { + + // New pos + _uiCurrentPos = iDelimiter; + } + + // Parse + if ((_uiCurrentPos != _strApplicationRule.length()) && ((iDelimiter = _strApplicationRule.find_first_of(_acDelimiters[_eStatus], _uiCurrentPos)) != string::npos)) { + + switch(_strApplicationRule[iDelimiter]) { + + case '{': + _eStatus = EBeginCompoundRule; + // Extract type + _strRuleType = _strApplicationRule.substr(_uiCurrentPos, iDelimiter - _uiCurrentPos); + _uiCurrentDeepness++; + break; + case '}': + _eStatus = EEndCompoundRule; + + if (!_uiCurrentDeepness--) { + + strError = "Missing opening brace"; + + return false; + } + break; + case ' ': + _eStatus = ECriterionRule; + // Extract type + _strRuleType = _strApplicationRule.substr(_uiCurrentPos, iDelimiter - _uiCurrentPos); + break; + case ',': + _eStatus = EContinue; + break; + } + // New pos + _uiCurrentPos = iDelimiter + 1; + } else { + + if (_uiCurrentDeepness) { + + strError = "Missing closing brace"; + + return false; + } + + // Remaining characters + if (_uiCurrentPos != _strApplicationRule.length()) { + + strError = "Syntax error"; + + return false; + } + // Done + _eStatus = EDone; + } + return true; +} + +// Rule type +const string& CRuleParser::getType() const +{ + return _strRuleType; +} + +// Criteria defintion +const CSelectionCriteriaDefinition* CRuleParser::getSelectionCriteriaDefinition() const +{ + return _pSelectionCriteriaDefinition; +} + +// Root rule +CCompoundRule* CRuleParser::grabRootRule() +{ + CCompoundRule* pRootRule = _pRootRule; + + assert(pRootRule); + + _pRootRule = NULL; + + return pRootRule; +} + +// Next word +bool CRuleParser::next(string& strNext, string& strError) +{ + string::size_type iDelimiter; + + // Consume spaces + if ((iDelimiter = _strApplicationRule.find_first_not_of(" ", _uiCurrentPos)) != string::npos) { + + // New pos + _uiCurrentPos = iDelimiter; + } + + if ((iDelimiter = _strApplicationRule.find_first_of("{} ,", _uiCurrentPos)) == string::npos) { + + strError = "Syntax error"; + + return false; + } + + strNext = _strApplicationRule.substr(_uiCurrentPos, iDelimiter - _uiCurrentPos); + + // New pos + _uiCurrentPos = iDelimiter; + + return true; +} |