BMPattern.cpp
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上传日期:2007-01-10
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文件大小:6k
源码类别:
xml/soap/webservice
开发平台:
C/C++
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation, and was
- * originally based on software copyright (c) 2001, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /*
- * $Log: BMPattern.cpp,v $
- * Revision 1.2 2001/05/11 13:26:40 tng
- * Copyright update.
- *
- * Revision 1.1 2001/03/02 19:22:31 knoaman
- * Schema: Regular expression handling part I
- *
- */
- // ---------------------------------------------------------------------------
- // Includes
- // ---------------------------------------------------------------------------
- #include <util/regx/BMPattern.hpp>
- #include <util/XMLString.hpp>
- #include <util/Janitor.hpp>
- // ---------------------------------------------------------------------------
- // BMPattern: Constructors
- // ---------------------------------------------------------------------------
- BMPattern::BMPattern(const XMLCh* const pattern, bool ignoreCase)
- :fPattern(XMLString::replicate(pattern)),
- fUppercasePattern(0),
- fIgnoreCase(ignoreCase),
- fShiftTable(0),
- fShiftTableLen(256) {
- try {
- initialize();
- }
- catch(...) {
- cleanUp();
- throw;
- }
- }
- BMPattern::BMPattern(const XMLCh* const pattern, int tableSize, bool ignoreCase)
- :fPattern(XMLString::replicate(pattern)),
- fUppercasePattern(0),
- fIgnoreCase(ignoreCase),
- fShiftTable(0),
- fShiftTableLen(tableSize) {
- try {
- initialize();
- }
- catch(...) {
- cleanUp();
- throw;
- }
- }
- BMPattern::~BMPattern() {
- cleanUp();
- }
- // ---------------------------------------------------------------------------
- // BMPattern: matches methods
- // ---------------------------------------------------------------------------
- int BMPattern::matches(const XMLCh* const content, int start, int limit) {
- const unsigned int patternLen = XMLString::stringLen(fPattern);
- // Uppercase Content
- XMLCh* ucContent = 0;
- if (patternLen == 0)
- return start;
- if (fIgnoreCase) {
- ucContent = XMLString::replicate(content);
- XMLString::upperCase(ucContent);
- }
- ArrayJanitor<XMLCh> janUCContent(ucContent);
- int index = start + patternLen;
- while (index <= limit) {
- int patternIndex = patternLen;
- int nIndex = index + 1;
- XMLCh ch;
- while (patternIndex > 0) {
- ch = content[--index];
- if (ch != fPattern[--patternIndex]) {
- // No match, so we will break. But first we have
- // to check the ignore case flag. If it is set, then
- // we try to match with the case ignored
- if (!fIgnoreCase ||
- (fUppercasePattern[patternIndex] != ucContent[index]))
- break;
- }
- if (patternIndex == 0)
- return index;
- }
- index += fShiftTable[ch % fShiftTableLen] + 1;
- if (index < nIndex)
- index = nIndex;
- }
- return -1;
- }
- // ---------------------------------------------------------------------------
- // BMPattern: private helpers methods
- // ---------------------------------------------------------------------------
- void BMPattern::initialize() {
- const unsigned int patternLen = XMLString::stringLen(fPattern);
- XMLCh* lowercasePattern = 0;
- fShiftTable = new int[fShiftTableLen];
- if (fIgnoreCase) {
- fUppercasePattern = XMLString::replicate(fPattern);
- lowercasePattern = XMLString::replicate(fPattern);
- XMLString::upperCase(fUppercasePattern);
- XMLString::lowerCase(lowercasePattern);
- }
- ArrayJanitor<XMLCh> janLowercase(lowercasePattern);
- for (unsigned int i=0; i< fShiftTableLen; i++)
- fShiftTable[i] = patternLen;
- for (unsigned int k=0; k< patternLen; k++) {
- XMLCh ch = fPattern[k];
- int diff = patternLen - k - 1;
- int index = ch % fShiftTableLen;
- if (diff < fShiftTable[index])
- fShiftTable[index] = diff;
- if (fIgnoreCase) {
- for (int j=0; j< 2; j++) {
- ch = (j == 0) ? fUppercasePattern[k] : lowercasePattern[k];
- index = ch % fShiftTableLen;
- if (diff < fShiftTable[index])
- fShiftTable[index] = diff;
- }
- }
- }
- }
- /**
- * End of file BMPattern.cpp
- */