Better bounds checking in RecordInputStream. Removed rarely used methods readShortArray and putShortArray
git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@701747 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Josh Micich
parent
4bf266b1c7
commit
9897317e8e
@ -33,7 +33,7 @@ public class RecordInputStream extends InputStream {
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/** Maximum size of a single record (minus the 4 byte header) without a continue*/
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public final static short MAX_RECORD_DATA_SIZE = 8224;
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private static final int INVALID_SID_VALUE = -1;
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private InputStream in;
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protected short currentSid;
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protected short currentLength = -1;
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@ -42,34 +42,34 @@ public class RecordInputStream extends InputStream {
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protected byte[] data = new byte[MAX_RECORD_DATA_SIZE];
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protected short recordOffset;
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protected long pos;
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private boolean autoContinue = true;
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public RecordInputStream(InputStream in) throws RecordFormatException {
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public RecordInputStream(InputStream in) throws RecordFormatException {
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this.in = in;
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try {
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nextSid = LittleEndian.readShort(in);
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//Dont increment the pos just yet (technically we are at the start of
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//the record stream until nextRecord is called).
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//Don't increment the pos just yet (technically we are at the start of
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//the record stream until nextRecord is called).
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} catch (IOException ex) {
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throw new RecordFormatException("Error reading bytes", ex);
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}
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}
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/** This method will read a byte from the current record*/
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public int read() {
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checkRecordPosition();
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byte result = data[recordOffset];
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recordOffset += 1;
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pos += 1;
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return result;
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}
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/** This method will read a byte from the current record*/
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public int read() {
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checkRecordPosition(LittleEndian.BYTE_SIZE);
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byte result = data[recordOffset];
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recordOffset += LittleEndian.BYTE_SIZE;
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pos += LittleEndian.BYTE_SIZE;
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return result;
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}
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public short getSid() {
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return currentSid;
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}
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public short getLength() {
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return currentLength;
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}
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@ -85,12 +85,11 @@ public class RecordInputStream extends InputStream {
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public boolean hasNextRecord() {
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return nextSid != INVALID_SID_VALUE;
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}
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/** Moves to the next record in the stream.
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*
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*
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* <i>Note: The auto continue flag is reset to true</i>
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*/
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public void nextRecord() throws RecordFormatException {
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if ((currentLength != -1) && (currentLength != recordOffset)) {
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System.out.println("WARN. Unread "+remaining()+" bytes of record 0x"+Integer.toHexString(currentSid));
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@ -100,7 +99,7 @@ public class RecordInputStream extends InputStream {
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autoContinue = true;
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try {
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recordOffset = 0;
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currentLength = LittleEndian.readShort(in);
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currentLength = LittleEndian.readShort(in);
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if (currentLength > MAX_RECORD_DATA_SIZE)
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throw new RecordFormatException("The content of an excel record cannot exceed "+MAX_RECORD_DATA_SIZE+" bytes");
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pos += LittleEndian.SHORT_SIZE;
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@ -113,138 +112,124 @@ public class RecordInputStream extends InputStream {
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// ex45582-22397.xls has one extra byte after the last record
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// Excel reads that file OK
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}
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nextSid = INVALID_SID_VALUE;
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nextSid = INVALID_SID_VALUE;
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} else {
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nextSid = LittleEndian.readShort(in);
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if (nextSid == INVALID_SID_VALUE) {
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throw new RecordFormatException("Found sid " + nextSid + " after record with sid 0x"
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+ Integer.toHexString(currentSid).toUpperCase());
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}
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}
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}
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} catch (IOException ex) {
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throw new RecordFormatException("Error reading bytes", ex);
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}
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}
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public void setAutoContinue(boolean enable) {
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this.autoContinue = enable;
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this.autoContinue = enable;
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}
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public boolean getAutoContinue() {
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return autoContinue;
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}
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protected void checkRecordPosition() {
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if (remaining() <= 0) {
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if (isContinueNext() && autoContinue) {
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nextRecord();
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}
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else throw new ArrayIndexOutOfBoundsException();
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}
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}
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/**
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* Reads an 8 bit, signed value
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*/
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public byte readByte() {
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checkRecordPosition();
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byte result = data[recordOffset];
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recordOffset += 1;
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pos += 1;
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return result;
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}
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/**
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* Reads a 16 bit, signed value
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*/
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public short readShort() {
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checkRecordPosition();
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short result = LittleEndian.getShort(data, recordOffset);
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recordOffset += LittleEndian.SHORT_SIZE;
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pos += LittleEndian.SHORT_SIZE;
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return result;
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}
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public int readInt() {
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checkRecordPosition();
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int result = LittleEndian.getInt(data, recordOffset);
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recordOffset += LittleEndian.INT_SIZE;
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pos += LittleEndian.INT_SIZE;
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return result;
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}
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private void checkRecordPosition(int requiredByteCount) {
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public long readLong() {
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checkRecordPosition();
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long result = LittleEndian.getLong(data, recordOffset);
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recordOffset += LittleEndian.LONG_SIZE;
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pos += LittleEndian.LONG_SIZE;
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return result;
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}
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if (remaining() < requiredByteCount) {
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if (isContinueNext() && autoContinue) {
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nextRecord();
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} else {
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throw new ArrayIndexOutOfBoundsException();
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}
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}
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}
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/**
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* Reads an 8 bit, signed value
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*/
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public byte readByte() {
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checkRecordPosition(LittleEndian.BYTE_SIZE);
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byte result = data[recordOffset];
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recordOffset += LittleEndian.BYTE_SIZE;
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pos += LittleEndian.BYTE_SIZE;
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return result;
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}
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/**
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* Reads a 16 bit, signed value
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*/
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public short readShort() {
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checkRecordPosition(LittleEndian.SHORT_SIZE);
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short result = LittleEndian.getShort(data, recordOffset);
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recordOffset += LittleEndian.SHORT_SIZE;
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pos += LittleEndian.SHORT_SIZE;
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return result;
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}
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public int readInt() {
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checkRecordPosition(LittleEndian.INT_SIZE);
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int result = LittleEndian.getInt(data, recordOffset);
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recordOffset += LittleEndian.INT_SIZE;
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pos += LittleEndian.INT_SIZE;
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return result;
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}
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public long readLong() {
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checkRecordPosition(LittleEndian.LONG_SIZE);
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long result = LittleEndian.getLong(data, recordOffset);
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recordOffset += LittleEndian.LONG_SIZE;
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pos += LittleEndian.LONG_SIZE;
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return result;
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}
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/**
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* Reads an 8 bit, unsigned value
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*/
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public short readUByte() {
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return (short) (readByte() & 0x00FF);
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}
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/**
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* Reads a 16 bit, unsigned value.
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* @return
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*/
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public int readUShort() {
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checkRecordPosition(LittleEndian.SHORT_SIZE);
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int result = LittleEndian.getUShort(data, recordOffset);
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recordOffset += LittleEndian.SHORT_SIZE;
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pos += LittleEndian.SHORT_SIZE;
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return result;
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}
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public double readDouble() {
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checkRecordPosition(LittleEndian.DOUBLE_SIZE);
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long valueLongBits = LittleEndian.getLong(data, recordOffset);
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double result = Double.longBitsToDouble(valueLongBits);
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if (Double.isNaN(result)) {
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throw new RuntimeException("Did not expect to read NaN"); // (Because Excel typically doesn't write NaN
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}
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recordOffset += LittleEndian.DOUBLE_SIZE;
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pos += LittleEndian.DOUBLE_SIZE;
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return result;
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}
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/**
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* Reads an 8 bit, unsigned value
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*/
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public short readUByte() {
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short s = readByte();
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if(s < 0) {
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s += 256;
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}
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return s;
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}
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/**
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* Reads a 16 bit,un- signed value.
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* @return
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*/
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public int readUShort() {
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checkRecordPosition();
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int result = LittleEndian.getUShort(data, recordOffset);
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recordOffset += LittleEndian.SHORT_SIZE;
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pos += LittleEndian.SHORT_SIZE;
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return result;
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}
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public double readDouble() {
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checkRecordPosition();
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long valueLongBits = LittleEndian.getLong(data, recordOffset);
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double result = Double.longBitsToDouble(valueLongBits);
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if (Double.isNaN(result)) {
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throw new RuntimeException("Did not expect to read NaN");
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}
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recordOffset += LittleEndian.DOUBLE_SIZE;
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pos += LittleEndian.DOUBLE_SIZE;
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return result;
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}
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public short[] readShortArray() {
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checkRecordPosition();
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short[] arr = LittleEndian.getShortArray(data, recordOffset);
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final int size = (2 * (arr.length +1));
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recordOffset += size;
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pos += size;
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return arr;
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}
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/**
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* given a byte array of 16-bit unicode characters, compress to 8-bit and
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* return a string
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*
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* { 0x16, 0x00 } -0x16
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*
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* given a byte array of 16-bit unicode characters, compress to 8-bit and
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* return a string
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*
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* { 0x16, 0x00 } -0x16
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*
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* @param length the length of the final string
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* @return the converted string
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* @exception IllegalArgumentException if len is too large (i.e.,
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* there is not enough data in string to create a String of that
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* length)
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*/
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* there is not enough data in string to create a String of that
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* length)
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*/
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public String readUnicodeLEString(int length) {
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if ((length < 0) || (((remaining() / 2) < length) && !isContinueNext())) {
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throw new IllegalArgumentException("Illegal length - asked for " + length + " but only " + (remaining()/2) + " left!");
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@ -258,11 +243,11 @@ public class RecordInputStream extends InputStream {
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if(compressByte != 1) throw new IllegalArgumentException("compressByte in continue records must be 1 while reading unicode LE string");
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}
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char ch = (char)readShort();
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buf.append(ch);
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buf.append(ch);
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}
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return buf.toString();
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}
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public String readCompressedUnicode(int length) {
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if ((length < 0) || ((remaining() < length) && !isContinueNext())) {
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throw new IllegalArgumentException("Illegal length " + length);
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@ -277,23 +262,23 @@ public class RecordInputStream extends InputStream {
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}
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byte b = readByte();
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char ch = (char)(0x00FF & b); // avoid sex
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buf.append(ch);
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buf.append(ch);
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}
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return buf.toString();
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return buf.toString();
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}
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/** Returns an excel style unicode string from the bytes reminaing in the record.
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* <i>Note:</i> Unicode strings differ from <b>normal</b> strings due to the addition of
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* formatting information.
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*
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*
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* @return The unicode string representation of the remaining bytes.
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*/
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public UnicodeString readUnicodeString() {
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return new UnicodeString(this);
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}
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/** Returns the remaining bytes for the current record.
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*
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*
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* @return The remaining bytes of the current record.
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*/
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public byte[] readRemainder() {
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@ -304,39 +289,39 @@ public class RecordInputStream extends InputStream {
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pos += size;
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return result;
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}
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/** Reads all byte data for the current record, including any
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* that overlaps into any following continue records.
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*
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*
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* @deprecated Best to write a input stream that wraps this one where there is
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* special sub record that may overlap continue records.
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*/
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*/
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public byte[] readAllContinuedRemainder() {
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//Using a ByteArrayOutputStream is just an easy way to get a
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//growable array of the data.
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ByteArrayOutputStream out = new ByteArrayOutputStream(2*MAX_RECORD_DATA_SIZE);
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while (isContinueNext()) {
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byte[] b = readRemainder();
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byte[] b = readRemainder();
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out.write(b, 0, b.length);
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nextRecord();
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}
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byte[] b = readRemainder();
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out.write(b, 0, b.length);
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byte[] b = readRemainder();
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out.write(b, 0, b.length);
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return out.toByteArray();
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}
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/** The remaining number of bytes in the <i>current</i> record.
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*
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*
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* @return The number of bytes remaining in the current record
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*/
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public int remaining() {
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return (currentLength - recordOffset);
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}
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/** Returns true iif a Continue record is next in the excel stream
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*
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/** Returns true iif a Continue record is next in the excel stream
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*
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* @return True when a ContinueRecord is next.
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*/
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public boolean isContinueNext() {
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@ -1,4 +1,3 @@
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/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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@ -15,66 +14,66 @@
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hssf.record;
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import org.apache.poi.util.*;
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import org.apache.poi.util.LittleEndian;
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/**
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* The series list record defines the series displayed as an overlay to the main chart record.
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* NOTE: This source is automatically generated please do not modify this file. Either subclass or
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* remove the record in src/records/definitions.
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*
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* The series list record defines the series displayed as an overlay to the main chart record.<br/>
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* TODO - does this record (0x1016) really exist. It doesn't seem to be referenced in either the OOO or MS doc
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*
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* @author Glen Stampoultzis (glens at apache.org)
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*/
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public class SeriesListRecord
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extends Record
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{
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public final static short sid = 0x1016;
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public final class SeriesListRecord extends Record {
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public final static short sid = 0x1016;
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private short[] field_1_seriesNumbers;
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public SeriesListRecord()
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{
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public SeriesListRecord(short[] seriesNumbers) {
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field_1_seriesNumbers = seriesNumbers;
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}
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public SeriesListRecord(RecordInputStream in)
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{
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field_1_seriesNumbers = in.readShortArray();
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public SeriesListRecord(RecordInputStream in) {
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int nItems = in.readUShort();
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short[] ss = new short[nItems];
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for (int i = 0; i < nItems; i++) {
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ss[i] = in.readShort();
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}
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field_1_seriesNumbers = ss;
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}
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public String toString()
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{
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public String toString() {
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StringBuffer buffer = new StringBuffer();
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buffer.append("[SERIESLIST]\n");
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buffer.append(" .seriesNumbers = ")
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.append(" (").append( getSeriesNumbers() ).append(" )");
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buffer.append(System.getProperty("line.separator"));
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buffer.append(" .seriesNumbers= ").append(" (").append( getSeriesNumbers() ).append(" )");
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buffer.append("\n");
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buffer.append("[/SERIESLIST]\n");
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return buffer.toString();
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}
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public int serialize(int offset, byte[] data)
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{
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int pos = 0;
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public int serialize(int offset, byte[] data) {
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LittleEndian.putShort(data, 0 + offset, sid);
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LittleEndian.putShort(data, 2 + offset, (short)(getRecordSize() - 4));
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int nItems = field_1_seriesNumbers.length;
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int dataSize = 2 + 2 * nItems;
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LittleEndian.putUShort(data, 0 + offset, sid);
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LittleEndian.putUShort(data, 2 + offset, dataSize);
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LittleEndian.putShortArray(data, 4 + offset + pos, field_1_seriesNumbers);
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LittleEndian.putUShort(data, 4 + offset, nItems);
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int pos = offset + 6;
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for (int i = 0; i < nItems; i++) {
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LittleEndian.putUShort(data, pos, field_1_seriesNumbers[i]);
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pos += 2;
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}
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return getRecordSize();
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return 4 + dataSize;
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}
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/**
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* Size of record (exluding 4 byte header)
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*/
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public int getRecordSize()
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{
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return 4 + field_1_seriesNumbers.length * 2 + 2;
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@ -86,34 +85,23 @@ public class SeriesListRecord
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}
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public Object clone() {
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SeriesListRecord rec = new SeriesListRecord();
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rec.field_1_seriesNumbers = field_1_seriesNumbers;
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return rec;
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return new SeriesListRecord((short[]) field_1_seriesNumbers.clone());
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}
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||||
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Get the series numbers field for the SeriesList record.
|
||||
*/
|
||||
public short[] getSeriesNumbers()
|
||||
{
|
||||
public short[] getSeriesNumbers() {
|
||||
return field_1_seriesNumbers;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the series numbers field for the SeriesList record.
|
||||
*/
|
||||
public void setSeriesNumbers(short[] field_1_seriesNumbers)
|
||||
{
|
||||
public void setSeriesNumbers(short[] field_1_seriesNumbers) {
|
||||
this.field_1_seriesNumbers = field_1_seriesNumbers;
|
||||
}
|
||||
|
||||
|
||||
} // END OF CLASS
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
@ -250,20 +250,6 @@ public final class LittleEndian implements LittleEndianConsts {
|
||||
putNumber(data, offset, value, LittleEndianConsts.BYTE_SIZE);
|
||||
}
|
||||
|
||||
/**
|
||||
* put a array of shorts into a byte array
|
||||
*
|
||||
*@param data the byte array
|
||||
*@param offset a starting offset into the byte array
|
||||
*@param value the short array
|
||||
*/
|
||||
public static void putShortArray(final byte[] data, final int offset, final short[] value) {
|
||||
putNumber(data, offset, value.length, SHORT_SIZE);
|
||||
for (int i = 0; i < value.length; i++) {
|
||||
putNumber(data, offset + 2 + (i * 2), value[i], SHORT_SIZE);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* put an unsigned short value into a byte array
|
||||
*
|
||||
|
||||
@ -29,7 +29,7 @@ import junit.framework.TestCase;
|
||||
* @author Glen Stampoultzis (glens at apache.org)
|
||||
*/
|
||||
public final class TestSeriesListRecord extends TestCase {
|
||||
byte[] data = new byte[] {
|
||||
private static final byte[] data = {
|
||||
(byte)0x02,(byte)0x00,(byte)0x01,(byte)0x20,(byte)0xff,(byte)0xf0
|
||||
};
|
||||
|
||||
@ -43,10 +43,8 @@ public final class TestSeriesListRecord extends TestCase {
|
||||
assertEquals( 4 + 6, record.getRecordSize() );
|
||||
}
|
||||
|
||||
public void testStore()
|
||||
{
|
||||
SeriesListRecord record = new SeriesListRecord();
|
||||
record.setSeriesNumbers( new short[] { (short)0x2001, (short)0xf0ff } );
|
||||
public void testStore() {
|
||||
SeriesListRecord record = new SeriesListRecord(new short[] { (short)0x2001, (short)0xf0ff } );
|
||||
|
||||
byte [] recordBytes = record.serialize();
|
||||
assertEquals(recordBytes.length - 4, data.length);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user