import string
+class Qcow2Field:
+
+ def __init__(self, value):
+ self.value = value
+
+ def __str__(self):
+ return str(self.value)
+
+
+class Flags64(Qcow2Field):
+
+ def __str__(self):
+ bits = []
+ for bit in range(64):
+ if self.value & (1 << bit):
+ bits.append(bit)
+ return str(bits)
+
+
class Qcow2StructMeta(type):
# Mapping from c types to python struct format
def dump(self):
for f in self.fields:
value = self.__dict__[f[2]]
- if f[1] == 'mask':
- bits = []
- for bit in range(64):
- if value & (1 << bit):
- bits.append(bit)
- value_str = str(bits)
- else:
+ if isinstance(f[1], str):
value_str = f[1].format(value)
+ else:
+ value_str = str(f[1](value))
print('{:<25} {}'.format(f[2], value_str))
('u64', '{:#x}', 'snapshot_offset'),
# Version 3 header fields
- ('u64', 'mask', 'incompatible_features'),
- ('u64', 'mask', 'compatible_features'),
- ('u64', 'mask', 'autoclear_features'),
+ ('u64', Flags64, 'incompatible_features'),
+ ('u64', Flags64, 'compatible_features'),
+ ('u64', Flags64, 'autoclear_features'),
('u32', '{}', 'refcount_order'),
('u32', '{}', 'header_length'),
)