From 047ab5b81f34f5b3d12db30915c4d3a7c14aa066 Mon Sep 17 00:00:00 2001
From: Jim Fulton <jim@zope.com>
Date: Wed, 22 Mar 2000 02:04:26 +0000
Subject: [PATCH] Finally, implemented the 'history' method.
---
trunk/src/ZODB/FileStorage.py | 54 ++++++++++++++++++++++++++++++++++-
1 file changed, 53 insertions(+), 1 deletion(-)
diff --git a/trunk/src/ZODB/FileStorage.py b/trunk/src/ZODB/FileStorage.py
index 6483c9f9..fde9a2c2 100644
--- a/trunk/src/ZODB/FileStorage.py
+++ b/trunk/src/ZODB/FileStorage.py
@@ -184,7 +184,7 @@
# may have a back pointer to a version record or to a non-version
# record.
#
-__version__='$Revision: 1.34 $'[11:-2]
+__version__='$Revision: 1.35 $'[11:-2]
import struct, time, os, bpthread, string, base64, sys
from struct import pack, unpack
@@ -863,6 +863,58 @@ class FileStorage(BaseStorage.BaseStorage):
return r
+ def history(self, oid, version=None, length=1, filter=None):
+ r=[]
+ file=self._file
+ seek=file.seek
+ read=file.read
+ pos=self._index[oid]
+ wantver=version
+
+ while 1:
+ if len(r) >= length: return r
+ seek(pos)
+ h=read(42)
+ doid,serial,prev,tloc,vlen,plen = unpack(">8s8s8s8sH8s", h)
+ prev=u64(prev)
+
+ if vlen:
+ nv = read(8) != z64
+ file.seek(8,1) # Skip previous version record pointer
+ version=read(vlen)
+ if wantver is not None and version != wantver:
+ if prev:
+ pos=prev
+ continue
+ else:
+ return r
+ else:
+ version=''
+ wantver=None
+
+ seek(u64(tloc))
+ h=read(23)
+ tid, stl, status, ul, dl, el = unpack(">8s8scHHH",h)
+ if el < 0: el=t32-el
+ user_name=read(ul)
+ description=read(dl)
+ if el: d=loads(read(el))
+ else: d={}
+
+ d['time']=TimeStamp(serial).timeTime()
+ d['user_name']=user_name
+ d['description']=description
+ d['serial']=serial
+ d['version']=version
+ d['size']=u64(plen)
+
+ if filter is None or filter(d):
+ r.append(d)
+
+ if prev: pos=prev
+ else: return r
+
+
def pack(self, t, referencesf):
"""Copy data from the current database file to a packed file
--
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