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A cleaner fix than the one committed last night. Generate random rowids that

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do not contain null bytes.
This commit is contained in:
Gregory P. Smith 2007-10-18 16:32:02 +00:00
parent f8a2a0b5a9
commit 3ef21cb7c6
1 changed files with 6 additions and 5 deletions
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11
Lib/bsddb/dbtables.py
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@ -360,12 +360,13 @@ class bsdTableDB :
unique = 0
while not unique:
# Generate a random 64-bit row ID string
# (note: this code has <56 bits of randomness
# (note: this code has <64 bits of randomness
# but it's plenty for our database id needs!)
# The | 0x01010101 is to ensure no null bytes are in the value
newid = struct.pack('ll',
random.randint(0, 2147483647) | 0x01010101,
random.randint(0, 2147483647) | 0x01010101)
# We must ensure that no null bytes are in the id value.
blist = []
for x in xrange(_rowid_str_len):
blist.append(random.randint(1,255))
newid = struct.pack('B'*_rowid_str_len, *blist)
# Guarantee uniqueness by adding this key to the database
try: