TarInputStream: Prevent Implicit narrowing conversion

https://github.com/eclipse-platform/eclipse.platform.ui/security/code-scanning/4

bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/TarEntry.java

@@ -23,7 +23,7 @@ public class TarEntry implements Cloneable
 	private String name;
 	private long mode, time, size;
 	private int type;
-	int filepos;
+	long filepos;
 
 	/**
 	 * Entry type for normal files.
@@ -42,7 +42,7 @@ public class TarEntry implements Cloneable
 	 * @param name filename
 	 * @param pos position in the file in bytes
 	 */
-	TarEntry(String name, int pos) {
+	TarEntry(String name, long pos) {
 		this.name = name;
 		mode = 0644;
 		type = FILE;

bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/TarInputStream.java

@@ -27,10 +27,10 @@
  */
 public class TarInputStream extends FilterInputStream
 {
-	private int nextEntry = 0;
-	private int nextEOF = 0;
-	private int filepos = 0;
-	private int bytesread = 0;
+	private long nextEntry = 0;
+	private long nextEOF = 0;
+	private long filepos = 0;
+	private long bytesread = 0;
 	private TarEntry firstEntry = null;
 	private String longLinkName = null;
 
@@ -79,7 +79,7 @@ private long headerChecksum(byte[] header) {
 	 * @return false if the entry has already been passed
 	 */
 	boolean skipToEntry(TarEntry entry) throws TarException, IOException {
-		int bytestoskip = entry.filepos - bytesread;
+		long bytestoskip = entry.filepos - bytesread;
 		if(bytestoskip < 0) {
 			return false;
 		}
@@ -310,7 +310,7 @@ public int read(byte[] b, int off, int len) throws IOException {
 			return -1;
 		}
 		if(len > nextEOF) {
-			len = nextEOF;
+			len = (int) nextEOF;
 		}
 		int size = super.read(b, off, len);
 		nextEntry -= size;