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File: [Pegasus] / pegasus / src / Pegasus / CQL / CQLParser.cpp
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Revision: 1.1.2.7, Thu Nov 4 21:46:18 2004 UTC (19 years, 8 months ago) by humberto Branch: CQL_2_5_BRANCH Changes since 1.1.2.6: +3 -1 lines PEP#: 193 TITLE: CQL Stage 1 DESCRIPTION: CQL implementation |
//%2003//////////////////////////////////////////////////////////////////////// // // Copyright (c) 2000, 2001, 2002 BMC Software, Hewlett-Packard Development // Company, L. P., IBM Corp., The Open Group, Tivoli Systems. // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L. P.; // IBM Corp.; EMC Corporation, The Open Group. // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to // deal in the Software without restriction, including without limitation the // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or // sell copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // //============================================================================== // // Author: Humberto Rivero (hurivero@us.ibm.com) // // Modified By: // //%///////////////////////////////////////////////////////////////////////////// #include <Pegasus/Common/Config.h> #include <Pegasus/Common/InternalException.h> #include <Pegasus/CQL/QueryException.h> #include <Pegasus/Common/Destroyer.h> #include <Pegasus/Common/Tracer.h> #include <Pegasus/Common/PegasusVersion.h> #include <iostream> #include "CQLParser.h" #include "CQLParserState.h" PEGASUS_USING_STD; extern int CQL_parse(); extern void CQL_restart (FILE *input_file); PEGASUS_NAMESPACE_BEGIN CQLParserState* globalParserState = 0; void CQLParser::parse( const char* text, CQLSelectStatement& statement) { PEG_METHOD_ENTER(TRC_CQL,"CQLParser::parse"); if (!text) { PEG_METHOD_EXIT(); throw NullPointer(); } statement.clear(); CQL_restart (0); globalParserState = new CQLParserState; globalParserState->error = false; globalParserState->text = text; globalParserState->textSize = strlen(text) + 1; globalParserState->offset = 0; globalParserState->currentTokenPos = 0; globalParserState->tokenCount = 0; globalParserState->currentRule = String::EMPTY; globalParserState->statement = &statement; CQL_parse(); if (globalParserState->error) { String errorMessage = globalParserState->errorMessage; cleanup(); Uint32 position = globalParserState->currentTokenPos; Uint32 token = globalParserState->tokenCount; String rule = globalParserState->currentRule; delete globalParserState; PEG_METHOD_EXIT(); throw CQLSyntaxErrorException(errorMessage,token,position,rule); } cleanup(); delete globalParserState; PEG_METHOD_EXIT(); } void CQLParser::parse( const Array<Sint8>& text, CQLSelectStatement& statement) { PEG_METHOD_ENTER(TRC_CQL,"CQLParser::parse"); if (text.size() == 0 || text[text.size() - 1] != '\0') { PEG_METHOD_EXIT(); throw MissingNullTerminator(); } parse(text.getData(), statement); PEG_METHOD_EXIT(); } void CQLParser::parse( const String& text, CQLSelectStatement& statement) { PEG_METHOD_ENTER(TRC_CQL,"CQLParser::parse"); parse(text.getCString(), statement); PEG_METHOD_EXIT(); } void CQLParser::cleanup() { PEG_METHOD_ENTER(TRC_CQL,"CQLParser::cleanup"); Array<char*>& arr = globalParserState->outstandingStrings; for (Uint32 i = 0, n = arr.size(); i < n; i++) delete [] arr[i]; arr.clear(); PEG_METHOD_EXIT(); } PEGASUS_NAMESPACE_END PEGASUS_USING_PEGASUS; int CQL_error(const char* errorMessage) { PEG_METHOD_ENTER(TRC_CQL,"CQL_error"); globalParserState->error = true; globalParserState->errorMessage = errorMessage; // // flex does not automatically flush the input buffer in case of error // CQL_restart (0); PEG_METHOD_EXIT(); return -1; } int CQLInput(char* buffer, int& numRead, int numRequested) { PEG_METHOD_ENTER(TRC_CQL,"CQLInput"); // // Be sure to account for the null terminator (the size of the text will // be one or more; this is fixed checked beforehand by CQLParser::parse()). // int remaining = globalParserState->textSize - globalParserState->offset - 1; if (remaining == 0) { numRead = 0; PEG_METHOD_EXIT(); return 0; } if (remaining < numRequested) numRequested = remaining; memcpy(buffer, globalParserState->text + globalParserState->offset, numRequested); globalParserState->offset += numRequested; numRead = numRequested; PEG_METHOD_EXIT(); return numRead; }
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