Commit d2c64994 authored by Jeremy Hylton's avatar Jeremy Hylton

Python 2.1 compatibility.

parent cd0f3ca2
......@@ -126,7 +126,7 @@ class Dumper:
self.dump_data(pos)
stlen2 = self.file.read(8)
print >> self.dest, "redundant trec len: %d" % u64(stlen2)
return True
return 1
def dump_data(self, tloc):
pos = self.file.tell()
......
......@@ -30,6 +30,7 @@ a backpointer after that time.
import os
import struct
from types import StringType
from ZODB.referencesf import referencesf
from ZODB.utils import p64, u64, z64
......@@ -84,7 +85,7 @@ class FileStorageFormatter:
s = self._file.read(DATA_HDR_LEN)
if len(s) != DATA_HDR_LEN:
raise CorruptedDataError(oid, s, pos)
h = DataHeader.fromString(s)
h = DataHeaderFromString(s)
if oid is not None and oid != h.oid:
raise CorruptedDataError(oid, s, pos)
if h.vlen:
......@@ -103,7 +104,7 @@ class FileStorageFormatter:
s = self._file.read(TRANS_HDR_LEN)
if len(s) != TRANS_HDR_LEN:
raise CorruptedDataError(tid, s, pos)
h = TxnHeader.fromString(s)
h = TxnHeaderFromString(s)
if tid is not None and tid != h.tid:
raise CorruptedDataError(tid, s, pos)
h.user = self._file.read(h.ulen)
......@@ -115,8 +116,8 @@ class FileStorageFormatter:
# shared implementation used by various _loadBack methods
#
# If the backpointer ultimately resolves to 0:
# If fail is True, raise KeyError for zero backpointer.
# If fail is False, return the empty data from the record
# If fail is 1, raise KeyError for zero backpointer.
# If fail is 0, return the empty data from the record
# with no backpointer.
while 1:
if not back:
......@@ -129,7 +130,7 @@ class FileStorageFormatter:
return None, h.serial, back, h.tloc
back = h.back
def _loadBackTxn(self, oid, back, fail=True):
def _loadBackTxn(self, oid, back, fail=1):
"""Return data, serial, and txn id for backpointer."""
data, serial, old, tloc = self._loadBack_impl(oid, back, fail)
self._file.seek(tloc)
......@@ -178,6 +179,9 @@ class FileStorageFormatter:
if dh.plen:
self.fail(pos, "data record has back pointer and data")
def DataHeaderFromString(s):
return DataHeader(*struct.unpack(DATA_HDR, s))
class DataHeader:
"""Header for a data record."""
......@@ -192,23 +196,18 @@ class DataHeader:
def __init__(self, oid, serial, prev, tloc, vlen, plen):
self.oid = oid
self.serial = serial
if isinstance(prev, str):
if isinstance(prev, StringType):
prev = u64(prev)
if isinstance(tloc, str):
if isinstance(tloc, StringType):
tloc = u64(tloc)
self.prev = prev
self.tloc = tloc
self.vlen = vlen
if isinstance(plen, str):
if isinstance(plen, StringType):
plen = u64(plen)
self.plen = plen
def fromString(cls, s):
return cls(*struct.unpack(DATA_HDR, s))
fromString = classmethod(fromString)
def asString(self):
s = struct.pack(DATA_HDR, self.oid, self.serial, p64(self.prev),
p64(self.tloc), self.vlen, p64(self.plen))
......@@ -236,6 +235,9 @@ class DataHeader:
rlen += 16 + self.vlen
return rlen
def TxnHeaderFromString(s):
return TxnHeader(*struct.unpack(TRANS_HDR, s))
class TxnHeader:
"""Header for a transaction record."""
......@@ -250,11 +252,6 @@ class TxnHeader:
self.dlen = dlen
self.elen = elen
def fromString(cls, s):
return cls(*struct.unpack(TRANS_HDR, s))
fromString = classmethod(fromString)
def asString(self):
s = struct.pack(TRANS_HDR, self.tid, p64(self.tlen), self.status,
self.ulen, self.dlen, self.elen)
......@@ -435,13 +432,13 @@ class GC(FileStorageFormatter):
self.ltid = z64
def isReachable(self, oid, pos):
"""Return True if revision of `oid` at `pos` is reachable."""
"""Return 1 if revision of `oid` at `pos` is reachable."""
rpos = self.reachable.get(oid)
if rpos is None:
return False
return 0
if rpos == pos:
return True
return 1
return pos in self.reach_ex.get(oid, [])
def findReachable(self):
......@@ -613,7 +610,7 @@ class FileStoragePacker(FileStorageFormatter):
self._file = open(path, "rb")
self._stop = stop
self._packt = None
self.locked = False
self.locked = 0
self._file.seek(0, 2)
self.file_end = self._file.tell()
self._file.seek(0)
......@@ -723,7 +720,7 @@ class FileStoragePacker(FileStorageFormatter):
"""
if back == 0:
return None
data, serial, tid = self._loadBackTxn(oid, back, False)
data, serial, tid = self._loadBackTxn(oid, back, 0)
return data
def copyDataRecords(self, pos, th):
......@@ -734,7 +731,7 @@ class FileStoragePacker(FileStorageFormatter):
If any data records are copied, also write txn header (th).
"""
copy = False
copy = 0
new_tpos = 0
tend = pos + th.tlen
pos += th.headerlen()
......@@ -754,7 +751,7 @@ class FileStoragePacker(FileStorageFormatter):
new_tpos = self._tfile.tell()
self._tfile.write(s)
new_pos = new_tpos + len(s)
copy = True
copy = 1
if h.plen:
data = self._file.read(h.plen)
......
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