re PR java/33765 (gcj internal compiler error when reading an empty file)

	PR java/33765:
	* jcf-parse.c (java_parse_file): Ignore ZIPEMPTYMAGIC files.
	* zipfile.h (ZIPEMPTYMAGIC): New define.

From-SVN: r129860

gcc/java/ChangeLog

+2007-11-02  Tom Tromey  <tromey@redhat.com>
+
+	PR java/33765:
+	* jcf-parse.c (java_parse_file): Ignore ZIPEMPTYMAGIC files.
+	* zipfile.h (ZIPEMPTYMAGIC): New define.
+
 2007-11-01  Tom Tromey  <tromey@redhat.com>
 
 	* Make-lang.in (java/jcf-dump.o): Depend on zipfile.h.

gcc/java/jcf-parse.c

@@ -1946,6 +1946,10 @@ java_parse_file (int set_yydebug ATTRIBUTE_UNUSED)
 #endif
 	  parse_zip_file_entries ();
 	}
+      else if (magic == (JCF_u4) ZIPEMPTYMAGIC)
+	{
+	  /* Ignore an empty input jar.  */
+	}
       else
 	{
 	  gcc_unreachable ();

gcc/java/zipfile.h

@@ -58,6 +58,7 @@ extern struct ZipFile *SeenZipFiles;
 #define ZIPDIR_NEXT(ZIPD) \
    ((ZipDirectory*)((char*)(ZIPD)+(ZIPD)->direntry_size))
 #define ZIPMAGIC 0x504b0304	
+#define ZIPEMPTYMAGIC 0x504b0506
 
 extern ZipFile * opendir_in_zip (const char *, int);
 extern int read_zip_archive (ZipFile *);