The DIRC (aka index) file format in Git uses a 16 bit unsigned int
field in at least one of the members for a file record.
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
org.spearce.jgit/src/org/spearce/jgit/util/NB.java | 35 ++++++++++++++++++++
1 files changed, 35 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 3af293a..ef21a4b 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/util/NB.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/util/NB.java
@@ -91,6 +91,22 @@ public final class NB {
}
/**
+ * Convert sequence of 2 bytes (network byte order) into unsigned value.
+ *
+ * @param intbuf
+ * buffer to acquire the 2 bytes of data from.
+ * @param offset
+ * position within the buffer to begin reading from. This
+ * position and the next byte after it (for a total of 2 bytes)
+ * will be read.
+ * @return unsigned integer value that matches the 16 bits read.
+ */
+ public static int decodeUInt16(final byte[] intbuf, final int offset) {
+ int r = (intbuf[offset] << 8) & 0xff;
+ return r | (intbuf[offset + 1] & 0xff);
+ }
+
+ /**
* Convert sequence of 4 bytes (network byte order) into signed value.
*
* @param intbuf
@@ -148,6 +164,25 @@ public final class NB {
}
/**
+ * Write a 16 bit integer as a sequence of 2 bytes (network byte order).
+ *
+ * @param intbuf
+ * buffer to write the 2 bytes of data into.
+ * @param offset
+ * position within the buffer to begin writing to. This position
+ * and the next byte after it (for a total of 2 bytes) will be
+ * replaced.
+ * @param v
+ * the value to write.
+ */
+ public static void encodeInt16(final byte[] intbuf, final int offset, int v) {
+ 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
--
1.6.0.rc2.219.g1250ab
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