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To better match OPOIFS, pad to the end of a block with 0xFF/-1

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1688543 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2015-07-01 00:43:33 +00:00
parent 75af780517
commit 605b16c061
2 changed files with 12 additions and 0 deletions
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10
src/java/org/apache/poi/poifs/filesystem/NPOIFSDocument.java
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@ -23,6 +23,7 @@ import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
@ -143,6 +144,15 @@ public final class NPOIFSDocument implements POIFSViewable {
os.write(buf, 0, readBytes);
}
// Pad to the end of the block with -1s
int usedInBlock = length % _block_size;
if (usedInBlock != 0 && usedInBlock != _block_size) {
int toBlockEnd = _block_size - usedInBlock;
byte[] padding = new byte[toBlockEnd];
Arrays.fill(padding, (byte)0xFF);
os.write(padding);
}
// Tidy and return the length
os.close();
return length;

2
src/testcases/org/apache/poi/poifs/filesystem/TestNPOIFSMiniStore.java
View File

@ -431,6 +431,7 @@ public final class TestNPOIFSMiniStore extends POITestCase {
assertEquals(POIFSConstants.END_OF_CHAIN, fs.getNextBlock(3)); // Mini
assertEquals(POIFSConstants.UNUSED_BLOCK, fs.getNextBlock(4));
// First 2 Mini blocks will be used
assertEquals(2, ministore.getFreeBlock());
// Add one more mini-stream, and check
@ -442,6 +443,7 @@ public final class TestNPOIFSMiniStore extends POITestCase {
assertEquals(POIFSConstants.END_OF_CHAIN, fs.getNextBlock(3)); // Mini
assertEquals(POIFSConstants.UNUSED_BLOCK, fs.getNextBlock(4));
// One more mini-block will be used
assertEquals(3, ministore.getFreeBlock());
// Check the contents too