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Patches from Werner Froidevaux 

PR:
Obtained from:
Submitted by:
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git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@352649 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Andrew C. Oliver 2002-05-26 23:19:58 +00:00
parent 4c519dfd61
commit d52ae71cde
3 changed files with 146 additions and 20 deletions
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33
src/java/org/apache/poi/hssf/record/formula/FormulaParser.java
View File

@ -70,7 +70,7 @@ import java.io.File;
* Lets Build a Compiler, by Jack Crenshaw
* BNF for the formula expression is :
* <expression> ::= <term> [<addop> <term>]*
* <term> ::= <factor> [ <mulop> <factor ]*
* <term> ::= <factor> [ <mulop> <factor> ]*
* <factor> ::= <number> | (<expression>) | <cellRef> | <function>
* <function> ::= <functionName> ([expression [, expression]*])
*
@ -281,8 +281,13 @@ public class FormulaParser {
numArgs++;
Expression();
}
while (Look == ',') { //TODO handle EmptyArgs
Match(',');
while (Look == ',' || Look == ';') { //TODO handle EmptyArgs
if(Look == ',') {
Match(',');
}
else {
Match(';');
}
Expression();
numArgs++;
}
@ -454,15 +459,19 @@ end;
String[] operands;
for (int i=0;i<numPtgs;i++) {
if (ptgs[i] instanceof OperationPtg) {
o = (OperationPtg) ptgs[i];
numOperands = o.getNumberOfOperands();
operands = new String[numOperands];
for (int j=0;j<numOperands;j++) {
operands[numOperands-j-1] = (String) stack.pop(); //TODO: catch stack underflow and throw parse exception.
}
String result = o.toFormulaString(operands);
stack.push(result);
// Excel allows to have AttrPtg at position 0 (such as Blanks) which
// do not have any operands. Skip them.
if(i > 0) {
o = (OperationPtg) ptgs[i];
numOperands = o.getNumberOfOperands();
operands = new String[numOperands];
for (int j=0;j<numOperands;j++) {
operands[numOperands-j-1] = (String) stack.pop(); //TODO: catch stack underflow and throw parse exception.
}
String result = o.toFormulaString(operands);
stack.push(result);
}
} else {
stack.push(ptgs[i].toFormulaString());
}

14
src/java/org/apache/poi/hssf/record/formula/Ptg.java
View File

@ -173,7 +173,6 @@ public abstract class Ptg
final int refArea = AreaPtg.sid-0x20;
final int arrayArea = AreaPtg.sid+0x20;
switch (id)
{
@ -204,7 +203,6 @@ public abstract class Ptg
case ConcatPtg.sid :
retval = new ConcatPtg(data, offset);
break;
case AreaPtg.sid :
retval = new AreaPtg(data, offset);
@ -246,13 +244,13 @@ public abstract class Ptg
retval = new FunctionPtg(data, offset);
break;
case NumberPtg.sid :
retval = new NumberPtg(data, offset);
break;
case NumberPtg.sid :
retval = new NumberPtg(data, offset);
break;
case StringPtg.sid :
retval = new StringPtg(data, offset);
break;
case NamePtg.sid :
retval = new NamePtg(data, offset);

119
src/java/org/apache/poi/hssf/record/formula/StringPtg.java Normal file
View File

@ -0,0 +1,119 @@
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 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 "Apache" and "Apache Software Foundation" and
* "Apache POI" 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",
* "Apache POI", 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. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.poi.hssf.record.formula;
import org.apache.poi.util.LittleEndian;
/**
* Number
* Stores a String value in a formula value stored in the format <length 2 bytes>char[]
* @author Werner Froidevaux
*/
public class StringPtg
extends Ptg
{
public final static int SIZE = 9;
public final static byte sid = 0x17;
private String field_1_value;
/** Create a StringPtg from a byte array read from disk */
public StringPtg(byte [] data, int offset)
{
setValue(new String(data, offset+3, data[offset+1] + 256*data[offset+2]));
}
/** Create a StringPtg from a string representation of the number
* Number format is not checked, it is expected to be validated in the parser
* that calls this method.
* @param value : String representation of a floating point number
*/
protected StringPtg(String value) {
setValue(value);
}
public void setValue(String value)
{
field_1_value = value;
}
public String getValue()
{
return field_1_value;
}
public void writeBytes(byte [] array, int offset)
{
array[ offset + 0 ] = sid;
array[ offset + 1 ] = (byte)(getValue().length() % 256);
array[ offset + 2 ] = (byte)(getValue().length() / 256);
System.arraycopy(getValue().getBytes(), 0, array, offset + 3, getValue().length());
}
public int getSize()
{
return field_1_value.length() + 3;
}
public String toFormulaString()
{
return getValue();
}
}