[JGIT PATCH 07/10] Add 64 bit network byte order encoding to NB
- From
Shawn O. Pearce <spearce@spearce.org>
- Date
- Jun 24, 2008, 02:10 UTC
- Message-ID
- <1214273408-70793-8-git-send-email-spearce@spearce.org>
- In-Reply-To
- <1214273408-70793-7-git-send-email-spearce@spearce.org>
The pack index v2 file format uses a 64 bit network byte order element for the 64 bit offset table. We already have code to read these elements, but we do not yet have code to write such an element to an output file.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> --- org.spearce.jgit/src/org/spearce/jgit/util/NB.java | 37 ++++++++++++++++++++ 1 files changed, 37 insertions(+), 0 deletions(-)
diff --git a/org.spearce.jgit/src/org/spearce/jgit/util/NB.java b/org.spearce.jgit/src/org/spearce/jgit/util/NB.java index 61877b8..6bb65d4 100644 --- a/org.spearce.jgit/src/org/spearce/jgit/util/NB.java +++ b/org.spearce.jgit/src/org/spearce/jgit/util/NB.java @@ -172,6 +172,43 @@ public final class NB { intbuf[offset] = (byte) v; } + /** + * Write a 64 bit integer as a sequence of 8 bytes (network byte order). + * + * @param intbuf + * buffer to write the 48bytes of data into. + * @param offset + * position within the buffer to begin writing to. This position + * and the next 7 bytes after it (for a total of 8 bytes) will be + * replaced. + * @param v + * the value to write. + */ + public static void encodeInt64(final byte[] intbuf, final int offset, long v) { + intbuf[offset + 7] = (byte) v; + v >>>= 8; + + intbuf[offset + 6] = (byte) v; + v >>>= 8; + + intbuf[offset + 5] = (byte) v; + v >>>= 8; + + intbuf[offset + 4] = (byte) v; + v >>>= 8; + + intbuf[offset + 3] = (byte) v; + v >>>= 8; + + intbuf[offset + 2] = (byte) v; + v >>>= 8; + + intbuf[offset + 1] = (byte) v; + v >>>= 8; + + intbuf[offset] = (byte) v; + } + private NB() { // Don't create instances of a static only utility. }
-- 1.5.6.74.g8a5e