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Diffstat (limited to 'libjava/java/util/zip/CRC32.java')
-rw-r--r-- | libjava/java/util/zip/CRC32.java | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/libjava/java/util/zip/CRC32.java b/libjava/java/util/zip/CRC32.java deleted file mode 100644 index 535cf184c72..00000000000 --- a/libjava/java/util/zip/CRC32.java +++ /dev/null @@ -1,70 +0,0 @@ -/* Copyright (C) 1999 Free Software Foundation - - This file is part of libgcj. - -This software is copyrighted work licensed under the terms of the -Libgcj License. Please consult the file "LIBGCJ_LICENSE" for -details. */ - -package java.util.zip; - -/** - * @author Per Bothner - * @date April 1, 1999. - */ - -/* - * Written using on-line Java Platform 1.2 API Specification, as well - * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998). - * The actual CRC32 algorithm is taken from RFC 1952. - * Status: Believed complete and correct. - */ - -public class CRC32 implements Checksum -{ - int crc = 0; - - static int[] crc_table = make_crc_table(); - - /* Make the table for a fast CRC. */ - static int[] make_crc_table () - { - int[] crc_table = new int[256]; - for (int n = 0; n < 256; n++) - { - int c = n; - for (int k = 8; --k >= 0; ) - { - if ((c & 1) != 0) - c = 0xedb88320 ^ (c >>> 1); - else - c = c >>> 1; - } - crc_table[n] = c; - } - return crc_table; - } - - public long getValue () - { - return (long) crc & 0xffffffffL; - } - - public void reset () { crc = 0; } - - public void update (int bval) - { - int c = ~crc; - c = crc_table[(c ^ bval) & 0xff] ^ (c >>> 8); - crc = ~c; - } - - public void update (byte[] buf, int off, int len) - { - int c = ~crc; - while (--len >= 0) - c = crc_table[(c ^ buf[off++]) & 0xff] ^ (c >>> 8); - crc = ~c; - } - public void update (byte[] buf) { update(buf, 0, buf.length); } -} |