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Fix bug in B*-tree size calculation

This commit is contained in:
Elliot Nunn 2018-10-14 16:30:32 +08:00
parent 829d3a5189
commit 67edf73321
1 changed files with 4 additions and 3 deletions
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7
machfs/btree.py
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@ -183,14 +183,15 @@ def make_btree(records, bthKeyLen, blksize):
most_recent[node.ndType] = i
bthFNode = most_recent.get(0xFF, 0)
bthFree = bitmanip.pad_up(len(nodelist), nodemult) - len(nodelist)
bthNNodes = len(nodelist) + bthFree
# Populate the first (header) record of the header node
bthNodeSize = 512
bthNNodes = len(nodelist); bthFree = 0
headnode.records[0] = struct.pack('>HLLLLHHLL76x',
bthDepth, bthRoot, bthNRecs, bthFNode, bthLNode,
bthNodeSize, bthKeyLen, bthNNodes, bthFree)
slop_nodes = bitmanip.pad_up(len(nodelist), nodemult) - len(nodelist)
nodelist.append(512 * slop_nodes)
nodelist.append(512 * bthFree)
return b''.join(bytes(node) for node in nodelist)