276d072ae7
Not part of build yet. a=leaf git-svn-id: svn://10.0.0.236/trunk@65511 18797224-902f-48f8-a5cc-f745e15eee43
244 lines
9.0 KiB
C++
244 lines
9.0 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is TransforMiiX XSLT processor.
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*
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* The Initial Developer of the Original Code is The MITRE Corporation.
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* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
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*
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* Portions created by Keith Visco as a Non MITRE employee,
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* (C) 1999 Keith Visco. All Rights Reserved.
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*
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* Contributor(s):
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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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* $Id: StringFunctionCall.cpp,v 1.2 2000-04-07 22:58:25 Peter.VanderBeken%pandora.be Exp $
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*/
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/**
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* StringFunctionCall
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* A representation of the XPath String funtions
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* @author <A HREF="mailto:kvisco@ziplink.net">Keith Visco</A>
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* @version $Revision: 1.2 $ $Date: 2000-04-07 22:58:25 $
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**/
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#include "FunctionLib.h"
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/**
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* Creates a default StringFunctionCall. The string() function
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* is the default
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**/
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StringFunctionCall::StringFunctionCall() : FunctionCall(XPathNames::STRING_FN) {
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type = STRING;
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} //-- StringFunctionCall
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/**
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* Creates a StringFunctionCall of the given type
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**/
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StringFunctionCall::StringFunctionCall(short type) : FunctionCall() {
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this->type = type;
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switch ( type ) {
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case CONCAT:
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FunctionCall::setName(XPathNames::CONCAT_FN);
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break;
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case CONTAINS:
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FunctionCall::setName(XPathNames::CONTAINS_FN);
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break;
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case STARTS_WITH:
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FunctionCall::setName(XPathNames::STARTS_WITH_FN);
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break;
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case STRING_LENGTH:
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FunctionCall::setName(XPathNames::STRING_LENGTH_FN);
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break;
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case SUBSTRING:
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FunctionCall::setName(XPathNames::SUBSTRING_FN);
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break;
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case SUBSTRING_AFTER:
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FunctionCall::setName(XPathNames::SUBSTRING_AFTER_FN);
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break;
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case SUBSTRING_BEFORE:
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FunctionCall::setName(XPathNames::SUBSTRING_BEFORE_FN);
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break;
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case TRANSLATE:
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FunctionCall::setName(XPathNames::TRANSLATE_FN);
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break;
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default:
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FunctionCall::setName(XPathNames::STRING_FN);
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break;
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}
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} //-- StringFunctionCall
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/**
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* Evaluates this Expr based on the given context node and processor state
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* @param context the context node for evaluation of this Expr
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* @param ps the ContextState containing the stack information needed
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* for evaluation
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* @return the result of the evaluation
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**/
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ExprResult* StringFunctionCall::evaluate(Node* context, ContextState* cs) {
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ListIterator* iter = params.iterator();
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Int32 argc = params.getLength();
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String err;
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ExprResult* result = 0;
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switch ( type ) {
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case CONCAT :
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if ( requireParams(2, cs) ) {
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String resultStr;
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while(iter->hasNext()) {
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evaluateToString((Expr*)iter->next(),context, cs, resultStr);
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}
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result = new StringResult(resultStr);
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}
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else result = new StringResult("");
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break;
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case CONTAINS :
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if ( requireParams(2, 2, cs) ) {
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String arg1, arg2;
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evaluateToString((Expr*)iter->next(),context, cs, arg1);
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evaluateToString((Expr*)iter->next(),context, cs, arg2);
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result = new BooleanResult((MBool)(arg1.indexOf(arg2) >= 0));
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}
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else result = new BooleanResult(MB_FALSE);
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break;
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case STARTS_WITH :
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if ( requireParams(2, 2, cs) ) {
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String arg1, arg2;
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evaluateToString((Expr*)iter->next(),context, cs, arg1);
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evaluateToString((Expr*)iter->next(),context, cs, arg2);
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result = new BooleanResult((MBool)(arg1.indexOf(arg2) == 0));
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}
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else result = new BooleanResult(MB_FALSE);
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break;
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case STRING_LENGTH:
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if ( requireParams(0, 1, cs) ) {
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DOMString resultStr;
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if ( argc == 1) {
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evaluateToString((Expr*)iter->next(),context, cs, resultStr);
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}
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else XMLDOMUtils::getNodeValue(context, &resultStr);
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result = new NumberResult( (double) resultStr.length());
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}
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else result = new NumberResult(0.0);
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break;
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case SUBSTRING:
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if ( requireParams(2, 3, cs) ) {
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String src;
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evaluateToString((Expr*)iter->next(),context, cs, src);
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double dbl = evaluateToNumber((Expr*)iter->next(), context, cs);
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//-- check for NaN
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if ( Double::isNaN(dbl)) {
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result = new StringResult("");
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break;
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}
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Int32 startIdx = (Int32)ceil(dbl);
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Int32 endIdx = src.length();
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if ( argc == 3) {
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dbl += evaluateToNumber((Expr*)iter->next(),context, cs);
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if (dbl == Double::POSITIVE_INFINITY) endIdx++;
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else if ( dbl == Double::NEGATIVE_INFINITY ) endIdx = 0;
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else endIdx = (Int32)floor(dbl);
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}
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String resultStr;
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//-- strings are indexed starting at 1 for XSL
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//-- adjust to a 0-based index
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if (startIdx > 0) startIdx--;
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else if (startIdx == 0 ) endIdx--;
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else startIdx=0;
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src.subString(startIdx,endIdx,resultStr);
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result = new StringResult(resultStr);
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}
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else result = new StringResult("");
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break;
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case SUBSTRING_AFTER:
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if ( requireParams(2, 2, cs) ) {
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String arg1, arg2;
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evaluateToString((Expr*)iter->next(),context, cs, arg1);
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evaluateToString((Expr*)iter->next(),context, cs, arg2);
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Int32 idx = arg1.indexOf(arg2);
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if ((idx >= 0)&&(idx<arg1.length())) {
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Int32 len = arg2.length();
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arg2.clear();
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arg1.subString(idx+len,arg2);
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result = new StringResult(arg2);
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break;
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}
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}
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result = new StringResult("");
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break;
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case SUBSTRING_BEFORE:
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if ( requireParams(2, 2, cs) ) {
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String arg1, arg2;
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evaluateToString((Expr*)iter->next(),context, cs, arg1);
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evaluateToString((Expr*)iter->next(),context, cs, arg2);
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Int32 idx = arg1.indexOf(arg2);
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if ((idx >= 0)&&(idx<arg1.length())) {
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arg2.clear();
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arg1.subString(0,idx,arg2);
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result = new StringResult(arg2);
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break;
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}
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}
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result = new StringResult("");
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break;
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case TRANSLATE:
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if ( requireParams(3, 3, cs) ) {
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String src, oldChars, newChars;
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evaluateToString((Expr*)iter->next(),context, cs, src);
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evaluateToString((Expr*)iter->next(),context, cs, oldChars);
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evaluateToString((Expr*)iter->next(),context, cs, newChars);
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Int32 size = src.length();
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UNICODE_CHAR* chars = src.toUnicode(new UNICODE_CHAR[size]);
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src.clear();
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Int32 newIdx = 0;
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Int32 i;
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for (i = 0; i < size; i++) {
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Int32 idx = oldChars.indexOf(chars[i]);
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if (idx >= 0) {
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char nchar = newChars.charAt(idx);
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if (nchar != -1) src.append(nchar);
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}
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else src.append(chars[i]);
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}
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delete chars;
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return new StringResult(src);
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}
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result = new StringResult("");
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break;
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default : //-- string( object? )
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if ( requireParams(0, 1, cs) ) {
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String resultStr;
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if (iter->hasNext()) {
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evaluateToString((Expr*)iter->next(),context, cs, resultStr);
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}
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else {
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DOMString temp;
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XMLDOMUtils::getNodeValue(context, &temp);
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if ( cs->isStripSpaceAllowed(context) ) {
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XMLUtils::stripSpace(temp, resultStr);
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}
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else resultStr.append(temp);
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}
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result = new StringResult(resultStr);
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}
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else result = new StringResult("");
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break;
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}
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delete iter;
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return result;
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} //-- evaluate
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