[PATCH v10 04/10] qcow2_format.py: dump bitmap flags in human readable way.

From: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: kwolf@redhat.com, vsementsov@virtuozzo.com,
	qemu-devel@nongnu.org, mreitz@redhat.com,
	andrey.shinkevich@virtuozzo.com, den@openvz.org
Subject: [PATCH v10 04/10] qcow2_format.py: dump bitmap flags in human readable way.
Date: Tue, 14 Jul 2020 00:36:37 +0300	[thread overview]
Message-ID: <1594676203-436999-5-git-send-email-andrey.shinkevich@virtuozzo.com> (raw)
In-Reply-To: <1594676203-436999-1-git-send-email-andrey.shinkevich@virtuozzo.com>

Introduce the class BitmapFlags that parses a bitmap flags mask.

Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
---
 tests/qemu-iotests/qcow2_format.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tests/qemu-iotests/qcow2_format.py b/tests/qemu-iotests/qcow2_format.py
index cbaffc4..e77c831 100644
--- a/tests/qemu-iotests/qcow2_format.py
+++ b/tests/qemu-iotests/qcow2_format.py
@@ -40,6 +40,22 @@ class Flags64(Qcow2Field):
         return str(bits)
 
 
+class BitmapFlags(Qcow2Field):
+
+    flags = {
+        0x1: 'in-use',
+        0x2: 'auto'
+    }
+
+    def __str__(self):
+        bits = []
+        for bit in range(64):
+            flag = self.value & (1 << bit)
+            if flag:
+                bits.append(self.flags.get(flag, f'bit-{bit}'))
+        return f'{self.value:#x} ({bits})'
+
+
 class Enum(Qcow2Field):
 
     def __str__(self):
-- 
1.8.3.1


