diff options
Diffstat (limited to 'org.eclipse.jgit/src/org/eclipse/jgit/util/NB.java')
| -rw-r--r-- | org.eclipse.jgit/src/org/eclipse/jgit/util/NB.java | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/util/NB.java b/org.eclipse.jgit/src/org/eclipse/jgit/util/NB.java index 8536f1dc25..471a4998d7 100644 --- a/org.eclipse.jgit/src/org/eclipse/jgit/util/NB.java +++ b/org.eclipse.jgit/src/org/eclipse/jgit/util/NB.java @@ -113,6 +113,24 @@ public final class NB { } /** + * Convert sequence of 3 bytes (network byte order) into unsigned value. + * + * @param intbuf + * buffer to acquire the 3 bytes of data from. + * @param offset + * position within the buffer to begin reading from. This + * position and the next 2 bytes after it (for a total of 3 + * bytes) will be read. + * @return signed integer value that matches the 24 bits read. + * @since 4.9 + */ + public static int decodeUInt24(byte[] intbuf, int offset) { + int r = (intbuf[offset] & 0xff) << 8; + r |= intbuf[offset + 1] & 0xff; + return (r << 8) | (intbuf[offset + 2] & 0xff); + } + + /** * Convert sequence of 4 bytes (network byte order) into signed value. * * @param intbuf @@ -223,6 +241,29 @@ public final class NB { } /** + * Write a 24 bit integer as a sequence of 3 bytes (network byte order). + * + * @param intbuf + * buffer to write the 3 bytes of data into. + * @param offset + * position within the buffer to begin writing to. This position + * and the next 2 bytes after it (for a total of 3 bytes) will be + * replaced. + * @param v + * the value to write. + * @since 4.9 + */ + public static void encodeInt24(byte[] intbuf, int offset, int v) { + intbuf[offset + 2] = (byte) v; + v >>>= 8; + + intbuf[offset + 1] = (byte) v; + v >>>= 8; + + intbuf[offset] = (byte) v; + } + + /** * Write a 32 bit integer as a sequence of 4 bytes (network byte order). * * @param intbuf |