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Levin Zimmermann
neoppod
Commits
53f1a309
Commit
53f1a309
authored
Feb 23, 2017
by
Kirill Smelkov
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parent
baf0c4b6
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+39
-1
t/neo/storage/fs1/filestorage.go
t/neo/storage/fs1/filestorage.go
+39
-1
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t/neo/storage/fs1/filestorage.go
View file @
53f1a309
...
...
@@ -30,6 +30,9 @@ type FileStorage struct {
index
*
fsIndex
topPos
int64
// position pointing just past last committed transaction
// (= size(f) when no commit is in progress)
// min/max tids committed
tidMin
,
tidMax
zodb
.
Tid
}
// IStorage
...
...
@@ -207,7 +210,42 @@ func OpenFileStorage(path string) (*FileStorage, error) {
panic
(
err
)
// XXX err
}
return
&
FileStorage
{
f
:
f
,
index
:
index
,
topPos
:
topPos
},
nil
// read tidMin/tidMax
// FIXME support empty file case
txnh
:=
TxnHeader
{}
_
,
err
=
txnh
.
Decode
(
f
,
4
)
if
err
!=
nil
{
return
nil
,
err
// XXX +context
}
tidMin
:=
txnh
.
Tid
var
qqq
[
8
]
byte
n
,
err
:=
f
.
ReadAt
(
qqq
[
:
],
topPos
-
8
)
if
n
==
len
(
qqq
)
{
err
=
nil
// we are ok to get EOF after reading it all
}
txnLenm8
:=
binary
.
BigEndian
.
Uint64
(
qqq
[
:
])
_
,
err
=
txnh
.
Decode
(
f
,
topPos
-
8
-
int64
(
txnLenm8
))
// XXX overflow ?
if
err
!=
nil
{
return
nil
,
err
// XXX +context
}
if
txnh
.
RecLenm8
!=
txnLenm8
{
panic
(
"redunant length mismatch"
)
// XXX
}
tidMax
:=
txnh
.
Tid
return
&
FileStorage
{
f
:
f
,
index
:
index
,
topPos
:
topPos
,
tidMin
:
tidMin
,
tidMax
:
tidMax
,
},
nil
}
...
...
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