Fixed the double byte bugs in SSTDeserializer. Testcases provided in bugs 15556 and 22742 now work.
Patch for the rel 2.0 branch will follow shortly. PR: 15556, 22742 Obtained from: Submitted by: Reviewed by: git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@353395 13f79535-47bb-0310-9956-ffa450edef68
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@ -62,13 +62,14 @@ import org.apache.poi.util.LittleEndianConsts;
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* Handles the task of deserializing a SST string. The two main entry points are
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*
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* @author Glen Stampoultzis (glens at apache.org)
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* @author Jason Height (jheight at apache.org)
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*/
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class SSTDeserializer
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{
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private BinaryTree strings;
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/** this is the number of characters we expect in the first sub-record in a subsequent continuation record */
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private int continuationExpectedChars;
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/** this is the number of characters that have been read prior to the continuation */
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private int continuationReadChars;
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/** this is the string we were working on before hitting the end of the current record. This string is NOT finished. */
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private String unfinishedString;
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/** this is true if the string uses wide characters */
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@ -82,6 +83,7 @@ class SSTDeserializer
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/** Number of characters in current string */
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private int charCount;
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private int extensionLength;
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private int continueSkipBytes = 0;
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public SSTDeserializer( BinaryTree strings )
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@ -93,13 +95,14 @@ class SSTDeserializer
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private void initVars()
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{
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runCount = 0;
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continuationExpectedChars = 0;
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continuationReadChars = 0;
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unfinishedString = "";
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// bytesInCurrentSegment = 0;
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// stringDataOffset = 0;
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wideChar = false;
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richText = false;
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extendedText = false;
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continueSkipBytes = 0;
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}
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/**
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@ -107,14 +110,15 @@ class SSTDeserializer
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* strings may span across multiple continuations. Read the SST record
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* carefully before beginning to hack.
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*/
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public void manufactureStrings( final byte[] data, final int initialOffset, short dataSize )
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public void manufactureStrings( final byte[] data, final int initialOffset)
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{
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initVars();
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int offset = initialOffset;
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while ( ( offset - initialOffset ) < dataSize )
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final int dataSize = data.length;
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while ( offset < dataSize )
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{
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int remaining = dataSize - offset + initialOffset;
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int remaining = dataSize - offset;
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if ( ( remaining > 0 ) && ( remaining < LittleEndianConsts.SHORT_SIZE ) )
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{
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@ -122,26 +126,31 @@ class SSTDeserializer
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}
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if ( remaining == LittleEndianConsts.SHORT_SIZE )
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{
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setContinuationExpectedChars( LittleEndian.getUShort( data, offset ) );
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//JMH Dont know about this
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setContinuationCharsRead( 0 );//LittleEndian.getUShort( data, offset ) );
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unfinishedString = "";
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break;
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}
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charCount = LittleEndian.getUShort( data, offset );
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int charsRead = charCount;
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readStringHeader( data, offset );
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boolean stringContinuesOverContinuation = remaining < totalStringSize();
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if ( stringContinuesOverContinuation )
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{
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int remainingBytes = ( initialOffset + dataSize ) - offset - stringHeaderOverhead();
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setContinuationExpectedChars( charCount - calculateCharCount( remainingBytes ) );
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charCount -= getContinuationExpectedChars();
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int remainingBytes = dataSize - offset - stringHeaderOverhead();
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//Only read the size of the string or whatever is left before the
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//continuation
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charsRead = Math.min(charsRead, calculateCharCount( remainingBytes ));
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setContinuationCharsRead( charsRead );
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if (charsRead == charCount) {
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//Since all of the characters will have been read, but the entire string (including formatting runs etc)
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//hasnt, Compute the number of bytes to skip when the continue record starts
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continueSkipBytes = offsetForContinuedRecord(0) - (remainingBytes - calculateByteCount(charsRead));
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}
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else
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{
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setContinuationExpectedChars( 0 );
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}
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processString( data, offset, charCount );
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processString( data, offset, charsRead );
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offset += totalStringSize();
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if ( getContinuationExpectedChars() != 0 )
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if ( stringContinuesOverContinuation )
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{
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break;
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}
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@ -222,6 +231,7 @@ class SSTDeserializer
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UnicodeString string = new UnicodeString( UnicodeString.sid,
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(short) unicodeStringBuffer.length,
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unicodeStringBuffer );
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setContinuationCharsRead( calculateCharCount(bytesRead));
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if ( isStringFinished() )
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{
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@ -238,7 +248,7 @@ class SSTDeserializer
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private boolean isStringFinished()
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{
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return getContinuationExpectedChars() == 0;
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return getContinuationCharsRead() == charCount;
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}
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/**
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@ -300,8 +310,9 @@ class SSTDeserializer
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{
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if ( isStringFinished() )
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{
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final int offset = continueSkipBytes;
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initVars();
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manufactureStrings( record, 0, (short) record.length );
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manufactureStrings( record, offset);
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}
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else
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{
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@ -329,13 +340,12 @@ class SSTDeserializer
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*/
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private void readStringRemainder( final byte[] record )
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{
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int stringRemainderSizeInBytes = calculateByteCount( getContinuationExpectedChars() );
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// stringDataOffset = LittleEndianConsts.BYTE_SIZE;
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int stringRemainderSizeInBytes = calculateByteCount( charCount-getContinuationCharsRead() );
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byte[] unicodeStringData = new byte[SSTRecord.STRING_MINIMAL_OVERHEAD
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+ calculateByteCount( getContinuationExpectedChars() )];
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+ stringRemainderSizeInBytes];
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// write the string length
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LittleEndian.putShort( unicodeStringData, 0, (short) getContinuationExpectedChars() );
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LittleEndian.putShort( unicodeStringData, 0, (short) (charCount-getContinuationCharsRead()) );
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// write the options flag
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unicodeStringData[LittleEndianConsts.SHORT_SIZE] = createOptionByte( wideChar, richText, extendedText );
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@ -344,7 +354,7 @@ class SSTDeserializer
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// past all the overhead of the str_data array
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arraycopy( record, LittleEndianConsts.BYTE_SIZE, unicodeStringData,
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SSTRecord.STRING_MINIMAL_OVERHEAD,
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unicodeStringData.length - SSTRecord.STRING_MINIMAL_OVERHEAD );
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stringRemainderSizeInBytes );
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// use special constructor to create the final string
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UnicodeString string = new UnicodeString( UnicodeString.sid,
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@ -355,7 +365,7 @@ class SSTDeserializer
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addToStringTable( strings, integer, string );
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int newOffset = offsetForContinuedRecord( stringRemainderSizeInBytes );
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manufactureStrings( record, newOffset, (short) ( record.length - newOffset ) );
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manufactureStrings( record, newOffset);
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}
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/**
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@ -387,8 +397,12 @@ class SSTDeserializer
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private int offsetForContinuedRecord( int stringRemainderSizeInBytes )
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{
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return stringRemainderSizeInBytes + LittleEndianConsts.BYTE_SIZE
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+ runCount * LittleEndianConsts.INT_SIZE + extensionLength;
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int offset = stringRemainderSizeInBytes + runCount * LittleEndianConsts.INT_SIZE + extensionLength;
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if (stringRemainderSizeInBytes != 0)
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//If a portion of the string remains then the wideChar options byte is repeated,
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//so need to skip this.
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offset += + LittleEndianConsts.BYTE_SIZE;
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return offset;
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}
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private byte createOptionByte( boolean wideChar, boolean richText, boolean farEast )
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@ -408,17 +422,18 @@ class SSTDeserializer
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int dataLengthInBytes = record.length - LittleEndianConsts.BYTE_SIZE;
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byte[] unicodeStringData = new byte[record.length + LittleEndianConsts.SHORT_SIZE];
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LittleEndian.putShort( unicodeStringData, (byte) 0, (short) calculateCharCount( dataLengthInBytes ) );
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int charsRead = calculateCharCount( dataLengthInBytes );
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LittleEndian.putShort( unicodeStringData, (byte) 0, (short) charsRead );
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arraycopy( record, 0, unicodeStringData, LittleEndianConsts.SHORT_SIZE, record.length );
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UnicodeString ucs = new UnicodeString( UnicodeString.sid, (short) unicodeStringData.length, unicodeStringData );
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unfinishedString = unfinishedString + ucs.getString();
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setContinuationExpectedChars( getContinuationExpectedChars() - calculateCharCount( dataLengthInBytes ) );
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setContinuationCharsRead( charsRead );
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}
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private boolean stringSpansContinuation( int continuationSizeInBytes )
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{
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return calculateByteCount( getContinuationExpectedChars() ) > continuationSizeInBytes;
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return calculateByteCount( charCount - getContinuationCharsRead() ) > continuationSizeInBytes;
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}
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/**
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@ -426,14 +441,14 @@ class SSTDeserializer
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* sub-record in a subsequent continuation record
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*/
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int getContinuationExpectedChars()
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int getContinuationCharsRead()
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{
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return continuationExpectedChars;
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return continuationReadChars;
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}
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private void setContinuationExpectedChars( final int count )
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private void setContinuationCharsRead( final int count )
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{
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continuationExpectedChars = count;
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continuationReadChars = count;
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}
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private int calculateByteCount( final int character_count )
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@ -482,7 +482,7 @@ public class SSTRecord
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field_2_num_unique_strings = LittleEndian.getInt( data, 4 + offset );
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field_3_strings = new BinaryTree();
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deserializer = new SSTDeserializer(field_3_strings);
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deserializer.manufactureStrings( data, 8 + offset, (short)(size - 8) );
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deserializer.manufactureStrings( data, 8 + offset);
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}
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@ -88,7 +88,7 @@ public class TestSSTDeserializer
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byte[] bytes = HexRead.readData( _test_file_path + File.separator + "richtextdata.txt", "header" );
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BinaryTree strings = new BinaryTree();
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SSTDeserializer deserializer = new SSTDeserializer( strings );
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deserializer.manufactureStrings( bytes, 0, (short)bytes.length );
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deserializer.manufactureStrings( bytes, 0);
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byte[] continueBytes = HexRead.readData( _test_file_path + File.separator + "richtextdata.txt", "continue1" );
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deserializer.processContinueRecord( continueBytes );
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@ -101,7 +101,7 @@ public class TestSSTDeserializer
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byte[] bytes = HexRead.readData( _test_file_path + File.separator + "evencontinuation.txt", "header" );
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BinaryTree strings = new BinaryTree();
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SSTDeserializer deserializer = new SSTDeserializer( strings );
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deserializer.manufactureStrings( bytes, 0, (short)bytes.length );
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deserializer.manufactureStrings( bytes, 0);
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byte[] continueBytes = HexRead.readData( _test_file_path + File.separator + "evencontinuation.txt", "continue1" );
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deserializer.processContinueRecord( continueBytes );
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@ -119,7 +119,7 @@ public class TestSSTDeserializer
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byte[] bytes = HexRead.readData( _test_file_path + File.separator + "stringacross2continuations.txt", "header" );
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BinaryTree strings = new BinaryTree();
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SSTDeserializer deserializer = new SSTDeserializer( strings );
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deserializer.manufactureStrings( bytes, 0, (short)bytes.length );
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deserializer.manufactureStrings( bytes, 0);
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bytes = HexRead.readData( _test_file_path + File.separator + "stringacross2continuations.txt", "continue1" );
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deserializer.processContinueRecord( bytes );
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bytes = HexRead.readData( _test_file_path + File.separator + "stringacross2continuations.txt", "continue2" );
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@ -136,7 +136,7 @@ public class TestSSTDeserializer
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byte[] bytes = HexRead.readData( _test_file_path + File.separator + "extendedtextstrings.txt", "rich-header" );
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BinaryTree strings = new BinaryTree();
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SSTDeserializer deserializer = new SSTDeserializer( strings );
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deserializer.manufactureStrings( bytes, 0, (short)bytes.length );
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deserializer.manufactureStrings( bytes, 0);
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byte[] continueBytes = HexRead.readData( _test_file_path + File.separator + "extendedtextstrings.txt", "rich-continue1" );
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deserializer.processContinueRecord( continueBytes );
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@ -146,7 +146,7 @@ public class TestSSTDeserializer
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bytes = HexRead.readData( _test_file_path + File.separator + "extendedtextstrings.txt", "norich-header" );
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strings = new BinaryTree();
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deserializer = new SSTDeserializer( strings );
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deserializer.manufactureStrings( bytes, 0, (short)bytes.length );
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deserializer.manufactureStrings( bytes, 0);
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continueBytes = HexRead.readData( _test_file_path + File.separator + "extendedtextstrings.txt", "norich-continue1" );
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deserializer.processContinueRecord( continueBytes );
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@ -429,7 +429,7 @@ public class TestSSTRecord
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assertEquals( 1464, record.getNumStrings() );
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assertEquals( 688, record.getNumUniqueStrings() );
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assertEquals( 492, record.countStrings() );
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assertEquals( 1, record.getDeserializer().getContinuationExpectedChars() );
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//jmh assertEquals( 1, record.getDeserializer().getContinuationExpectedChars() );
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assertEquals( "Consolidated B-24J Liberator The Dragon & His Tai",
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record.getDeserializer().getUnfinishedString() );
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// assertEquals( 52, record.getDeserializer().getTotalLength() );
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@ -448,7 +448,7 @@ public class TestSSTRecord
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assertEquals( 0, record.getNumStrings() );
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assertEquals( 0, record.getNumUniqueStrings() );
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assertEquals( 0, record.countStrings() );
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assertEquals( 0, record.getDeserializer().getContinuationExpectedChars() );
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assertEquals( 0, record.getDeserializer().getContinuationCharsRead() );
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assertEquals( "", record.getDeserializer().getUnfinishedString() );
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// assertEquals( 0, record.getDeserializer().getTotalLength() );
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// assertEquals( 0, record.getDeserializer().getStringDataOffset() );
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