87 def validator(current, pick, choices):  argument
88     """Return a value not equal to the current selected by the pick
93         if not val == current:
97 def int_validator(current, intervals):  argument
98     """Return a random value from intervals not equal to the current.
100     This function is useful for selection from valid values except current one.
102     return validator(current, random_from_intervals, intervals)
105 def bit_validator(current, bit_ranges):  argument
106     """Return a random bit mask not equal to the current.
108     This function is useful for selection from valid values except current one.
110     return validator(current, random_bits, bit_ranges)
113 def bytes_validator(current, sequences):  argument
114     """Return a random bytes value from the list not equal to the current.
116     This function is useful for selection from valid values except current one.
118     return validator(current, random.choice, sequences)
121 def selector(current, constraints, validate=int_validator):  argument
135             return validate(current, c)
140     # Remove current for cases it's implicitly specified in constraints
146         fuzz_values.remove(current)
152 def magic(current):  argument
155     The function just returns the current magic value and provides uniformity
158     return current
161 def version(current):  argument
167     return selector(current, constraints)
170 def backing_file_offset(current):  argument
173     return selector(current, constraints)
176 def backing_file_size(current):  argument
179     return selector(current, constraints)
182 def cluster_bits(current):  argument
188     return selector(current, constraints)
191 def size(current):  argument
194     return selector(current, constraints)
197 def crypt_method(current):  argument
203     return selector(current, constraints)
206 def l1_size(current):  argument
209     return selector(current, constraints)
212 def l1_table_offset(current):  argument
215     return selector(current, constraints)
218 def refcount_table_offset(current):  argument
221     return selector(current, constraints)
224 def refcount_table_clusters(current):  argument
227     return selector(current, constraints)
230 def nb_snapshots(current):  argument
233     return selector(current, constraints)
236 def snapshots_offset(current):  argument
239     return selector(current, constraints)
242 def incompatible_features(current):  argument
248     return selector(current, constraints, bit_validator)
251 def compatible_features(current):  argument
256     return selector(current, constraints, bit_validator)
259 def autoclear_features(current):  argument
264     return selector(current, constraints, bit_validator)
267 def refcount_order(current):  argument
270     return selector(current, constraints)
273 def header_length(current):  argument
280     return selector(current, constraints)
283 def bf_name(current):  argument
286         truncate_bytes(BYTES_V, len(current))
288     return selector(current, constraints, bytes_validator)
291 def ext_magic(current):  argument
294     return selector(current, constraints)
297 def ext_length(current):  argument
300     return selector(current, constraints)
303 def bf_format(current):  argument
306         truncate_bytes(BYTES_V, len(current)),
307         truncate_bytes(BYTES_V, (len(current) + 7) & ~7)  # Fuzz padding
309     return selector(current, constraints, bytes_validator)
312 def feature_type(current):  argument
315     return selector(current, constraints)
318 def feature_bit_number(current):  argument
321     return selector(current, constraints)
324 def feature_name(current):  argument
327         truncate_bytes(BYTES_V, len(current)),
330     return selector(current, constraints, bytes_validator)
333 def l1_entry(current):  argument
339              random.choice([selector(current, constraints), current])
344 def l2_entry(current):  argument
350              random.choice([selector(current, constraints), current])
359 def refcount_table_entry(current):  argument
362     return selector(current, constraints)
365 def refcount_block_entry(current):  argument
368     return selector(current, constraints)