contrib/qemu: Import qemu block source code

This qemu block format source code and its minimal
dependency files will be used in the next patch to implement
a qemu-block format translator.

Change-Id: Ic87638972f7ea9b3df84d7a0539512a250c11c1c
BUG: 986775
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/5366
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/contrib/qemu/util/hexdump.c b/contrib/qemu/util/hexdump.c
new file mode 100644
index 00000000..969b3406
--- /dev/null
+++ b/contrib/qemu/util/hexdump.c
@@ -0,0 +1,37 @@
+/*
+ * Helper to hexdump a buffer
+ *
+ * Copyright (c) 2013 Red Hat, Inc.
+ * Copyright (c) 2013 Gerd Hoffmann <kraxel@redhat.com>
+ * Copyright (c) 2013 Peter Crosthwaite <peter.crosthwaite@xilinx.com>
+ * Copyright (c) 2013 Xilinx, Inc
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#include "qemu-common.h"
+
+void qemu_hexdump(const char *buf, FILE *fp, const char *prefix, size_t size)
+{
+    unsigned int b;
+
+    for (b = 0; b < size; b++) {
+        if ((b % 16) == 0) {
+            fprintf(fp, "%s: %04x:", prefix, b);
+        }
+        if ((b % 4) == 0) {
+            fprintf(fp, " ");
+        }
+        fprintf(fp, " %02x", (unsigned char)buf[b]);
+        if ((b % 16) == 15) {
+            fprintf(fp, "\n");
+        }
+    }
+    if ((b % 16) != 0) {
+        fprintf(fp, "\n");
+    }
+}