/**
* Created by Hiroshi Miura on 16/04/09.
*/
-public class DictZipFileUtils {
- /**
- * Reads unsigned byte.
- *
- * @param in input stream to read.
- * @return unsigned byte value.
- * @throws IOException when error in file reading.
- */
- public static int readUByte(final InputStream in) throws IOException {
- int b = in.read();
- if (b == -1) {
- throw new EOFException();
- }
- return b;
- }
-
- /**
- * Reads unsigned integer in Intel byte order.
- *
- * @param in input stream to read.
- * @return unsigned integer value.
- * @throws IOException when error in file reading.
- */
- public static long readUInt(final InputStream in) throws IOException {
- long s = readUShort(in);
- return ((long) readUShort(in) << 16) | s;
- }
-
- /**
- * Reads unsigned short in Intel byte order.
- *
- * @param in input stream to read.
- * @return unsigned short value.
- * @throws IOException when error in file reading.
- */
- public static int readUShort(final InputStream in) throws IOException {
- int b = readUByte(in);
- return ((int) readUByte(in) << 8) | b;
- }
-
- /**
- * Writes integer in Intel byte order.
- *
- * @param out output stream to write.
- * @param i integer to write.
- * @throws IOException when error in file output.
- */
- public static void writeInt(final OutputStream out, final int i) throws IOException {
- writeShort(out, i & 0xffff);
- writeShort(out, (i >> 16) & 0xffff);
- }
-
- /**
- * Writes short integer in Intel byte order.
- *
- * @param out output stream to write.
- * @param s short integer to write.
- * @throws IOException when error in file output.
- */
- public static void writeShort(final OutputStream out, final int s) throws IOException {
- out.write(s & 0xff);
- out.write((s >> 8) & 0xff);
- }
+class DictZipFileUtils {
+ /**
+ * Reads unsigned byte.
+ *
+ * @param in input stream to read.
+ * @return unsigned byte value.
+ * @throws IOException when error in file reading.
+ */
+ static int readUByte(final InputStream in) throws IOException {
+ int b = in.read();
+ if (b == -1) {
+ throw new EOFException();
+ }
+ return b;
+ }
+
+ /**
+ * Reads unsigned integer in Intel byte order.
+ *
+ * @param in input stream to read.
+ * @return unsigned integer value.
+ * @throws IOException when error in file reading.
+ */
+ static long readUInt(final InputStream in) throws IOException {
+ long s = readUShort(in);
+ return ((long) readUShort(in) << 16) | s;
+ }
+
+ /**
+ * Reads unsigned short in Intel byte order.
+ *
+ * @param in input stream to read.
+ * @return unsigned short value.
+ * @throws IOException when error in file reading.
+ */
+ static int readUShort(final InputStream in) throws IOException {
+ int b = readUByte(in);
+ return (readUByte(in) << 8) | b;
+ }
+
+ /**
+ * Writes integer in Intel byte order.
+ *
+ * @param out output stream to write.
+ * @param i integer to write.
+ * @throws IOException when error in file output.
+ */
+ void writeInt(final OutputStream out, final int i) throws IOException {
+ writeShort(out, i & 0xffff);
+ writeShort(out, (i >> 16) & 0xffff);
+ }
+
+ /**
+ * Writes short integer in Intel byte order.
+ *
+ * @param out output stream to write.
+ * @param s short integer to write.
+ * @throws IOException when error in file output.
+ */
+ static void writeShort(final OutputStream out, final int s) throws IOException {
+ out.write(s & 0xff);
+ out.write((s >> 8) & 0xff);
+ }
/**
- * Compare binary files. Both files must be files (not directories) and exist.
- *
- * @param first - first file
- * @param second - second file
- * @return boolean - true if files are binery equal
- * @throws IOException - error in function
- */
- public static boolean isFileBinaryEquals(File first, File second) throws IOException {
+ * Compare binary files. Both files must be files (not directories) and exist.
+ *
+ * @param first - first file
+ * @param second - second file
+ * @return boolean - true if files are binery equal
+ * @throws IOException - error in function
+ */
+ static boolean isFileBinaryEquals(File first, File second) throws IOException {
return isFileBinaryEquals(first, second, 0, first.length());
- }
+ }
/**
- * Compare binary files (for test). Both files must be files (not directories) and exist.
- *
- * @param first - first file
- * @param second - second file
- * @param off - compare from offset
- * @param len - comparison length
- * @return boolean - true if files are binery equal
- * @throws IOException - error in function
- */
- public static boolean isFileBinaryEquals( File first, File second, final long off, final long len) throws IOException {
- boolean result= false;
- final int BUFFER_SIZE = 65536;
- final int COMP_SIZE = 512;
-
- if (len <= 1) {
- throw new IllegalArgumentException();
- }
-
- if ((first.exists()) && (second.exists())
- && (first.isFile()) && (second.isFile())) {
- if (first.getCanonicalPath().equals(second.getCanonicalPath())) {
- result = true;
- } else {
- FileInputStream firstInput;
- FileInputStream secondInput;
- BufferedInputStream bufFirstInput = null;
- BufferedInputStream bufSecondInput = null;
-
- try {
- firstInput = new FileInputStream(first);
- secondInput = new FileInputStream(second);
- bufFirstInput = new BufferedInputStream(firstInput, BUFFER_SIZE);
- bufSecondInput = new BufferedInputStream(secondInput, BUFFER_SIZE);
-
- byte[] firstBytes = new byte[COMP_SIZE];
- byte[] secondBytes = new byte[COMP_SIZE];
-
- bufFirstInput.skip(off);
- bufSecondInput.skip(off);
-
- long readLengthTotal = 0;
- result = true;
- while (readLengthTotal < len) {
- int readLength = COMP_SIZE;
- if (len - readLengthTotal < (long) COMP_SIZE) {
- readLength = (int) (len - readLengthTotal);
- }
- int lenFirst = bufFirstInput.read(firstBytes, 0, readLength);
- int lenSecond = bufSecondInput.read(secondBytes, 0, readLength);
- if (lenFirst != lenSecond) {
- result = false;
- break;
- }
- if ((lenFirst < 0) && (lenSecond < 0)) {
- result = true;
- break;
- }
- readLengthTotal += lenFirst;
- if (lenFirst < firstBytes.length) {
- byte[] a = Arrays.copyOfRange(firstBytes, 0, lenFirst);
- byte[] b = Arrays.copyOfRange(secondBytes, 0, lenSecond);
- if (!Arrays.equals(a, b)) {
- result = false;
- break;
- }
- } else if (!Arrays.equals(firstBytes, secondBytes)) {
- result = false;
- break;
- }
- }
- } catch (RuntimeException e) {
- throw e;
- } finally {
- try {
- if (bufFirstInput != null) {
- bufFirstInput.close();
- }
- } finally {
- if (bufSecondInput != null) {
- bufSecondInput.close();
- }
- }
+ * Compare binary files (for test). Both files must be files (not directories) and exist.
+ *
+ * @param first - first file
+ * @param second - second file
+ * @param off - compare from offset
+ * @param len - comparison length
+ * @return boolean - true if files are binery equal
+ * @throws IOException - error in function
+ */
+ static boolean isFileBinaryEquals(File first, File second, final long off, final long len) throws IOException {
+ boolean result = false;
+ final int BUFFER_SIZE = 65536;
+ final int COMP_SIZE = 512;
+
+ if (len <= 1) {
+ throw new IllegalArgumentException();
+ }
+
+ if ((first.exists()) && (second.exists())
+ && (first.isFile()) && (second.isFile())) {
+ if (first.getCanonicalPath().equals(second.getCanonicalPath())) {
+ result = true;
+ } else {
+ FileInputStream firstInput;
+ FileInputStream secondInput;
+ BufferedInputStream bufFirstInput = null;
+ BufferedInputStream bufSecondInput = null;
+
+ try {
+ firstInput = new FileInputStream(first);
+ secondInput = new FileInputStream(second);
+ bufFirstInput = new BufferedInputStream(firstInput, BUFFER_SIZE);
+ bufSecondInput = new BufferedInputStream(secondInput, BUFFER_SIZE);
+
+ byte[] firstBytes = new byte[COMP_SIZE];
+ byte[] secondBytes = new byte[COMP_SIZE];
+
+ bufFirstInput.skip(off);
+ bufSecondInput.skip(off);
+
+ long readLengthTotal = 0;
+ result = true;
+ while (readLengthTotal < len) {
+ int readLength = COMP_SIZE;
+ if (len - readLengthTotal < (long) COMP_SIZE) {
+ readLength = (int) (len - readLengthTotal);
+ }
+ int lenFirst = bufFirstInput.read(firstBytes, 0, readLength);
+ int lenSecond = bufSecondInput.read(secondBytes, 0, readLength);
+ if (lenFirst != lenSecond) {
+ result = false;
+ break;
+ }
+ if ((lenFirst < 0) && (lenSecond < 0)) {
+ result = true;
+ break;
+ }
+ readLengthTotal += lenFirst;
+ if (lenFirst < firstBytes.length) {
+ byte[] a = Arrays.copyOfRange(firstBytes, 0, lenFirst);
+ byte[] b = Arrays.copyOfRange(secondBytes, 0, lenSecond);
+ if (!Arrays.equals(a, b)) {
+ result = false;
+ break;
+ }
+ } else if (!Arrays.equals(firstBytes, secondBytes)) {
+ result = false;
+ break;
+ }
+ }
+ } catch (RuntimeException e) {
+ throw e;
+ } finally {
+ try {
+ if (bufFirstInput != null) {
+ bufFirstInput.close();
+ }
+ } finally {
+ if (bufSecondInput != null) {
+ bufSecondInput.close();
+ }
+ }
+ }
}
- }
- }
+ }
- return result;
- }
+ return result;
+ }
- private DictZipFileUtils() {
- }
+ private DictZipFileUtils() {
+ }
}
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