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ruanhaishen
redis
Commits
d72562f7
Commit
d72562f7
authored
May 30, 2010
by
Pieter Noordhuis
Browse files
generic pop and length function for ziplist encoding
parent
c7d9d662
Changes
1
Hide whitespace changes
Inline
Side-by-side
redis.c
View file @
d72562f7
...
...
@@ -4790,6 +4790,52 @@ static void lPush(robj *subject, robj *value, int where) {
}
}
static
robj
*
lPop
(
robj
*
subject
,
int
where
)
{
robj
*
value
=
NULL
;
if
(
subject
->
encoding
==
REDIS_ENCODING_ZIPLIST
)
{
unsigned
char
*
p
;
char
*
v
;
unsigned
int
vlen
;
long
long
vval
;
int
pos
=
(
where
==
REDIS_HEAD
)
?
0
:
-
1
;
p
=
ziplistIndex
(
subject
->
ptr
,
pos
);
if
(
ziplistGet
(
p
,
&
v
,
&
vlen
,
&
vval
))
{
if
(
v
)
{
value
=
createStringObject
(
v
,
vlen
);
}
else
{
value
=
createStringObjectFromLongLong
(
vval
);
}
}
subject
->
ptr
=
ziplistDelete
(
subject
->
ptr
,
&
p
,
ZIPLIST_TAIL
);
}
else
if
(
subject
->
encoding
==
REDIS_ENCODING_LIST
)
{
list
*
list
=
subject
->
ptr
;
listNode
*
ln
;
if
(
where
==
REDIS_HEAD
)
{
ln
=
listFirst
(
list
);
}
else
{
ln
=
listLast
(
list
);
}
if
(
ln
!=
NULL
)
{
value
=
listNodeValue
(
ln
);
incrRefCount
(
value
);
listDelNode
(
list
,
ln
);
}
}
else
{
redisPanic
(
"Unknown list encoding"
);
}
return
value
;
}
static
unsigned
long
lLength
(
robj
*
subject
)
{
if
(
subject
->
encoding
==
REDIS_ENCODING_ZIPLIST
)
{
return
ziplistLen
(
subject
->
ptr
);
}
else
if
(
subject
->
encoding
==
REDIS_ENCODING_LIST
)
{
return
listLength
((
list
*
)
subject
->
ptr
);
}
else
{
redisPanic
(
"Unknown list encoding"
);
}
}
static
void
pushGenericCommand
(
redisClient
*
c
,
int
where
)
{
robj
*
lobj
=
lookupKeyWrite
(
c
->
db
,
c
->
argv
[
1
]);
...
...
@@ -4826,14 +4872,9 @@ static void rpushCommand(redisClient *c) {
}
static
void
llenCommand
(
redisClient
*
c
)
{
robj
*
o
;
list
*
l
;
if
((
o
=
lookupKeyReadOrReply
(
c
,
c
->
argv
[
1
],
shared
.
czero
))
==
NULL
||
checkType
(
c
,
o
,
REDIS_LIST
))
return
;
l
=
o
->
ptr
;
addReplyUlong
(
c
,
listLength
(
l
));
robj
*
o
=
lookupKeyReadOrReply
(
c
,
c
->
argv
[
1
],
shared
.
czero
);
if
(
o
==
NULL
||
checkType
(
c
,
o
,
REDIS_LIST
))
return
;
addReplyUlong
(
c
,
lLength
(
o
));
}
static
void
lindexCommand
(
redisClient
*
c
)
{
...
...
@@ -4880,26 +4921,16 @@ static void lsetCommand(redisClient *c) {
}
static
void
popGenericCommand
(
redisClient
*
c
,
int
where
)
{
robj
*
o
;
list
*
list
;
listNode
*
ln
;
if
((
o
=
lookupKeyWriteOrReply
(
c
,
c
->
argv
[
1
],
shared
.
nullbulk
))
==
NULL
||
checkType
(
c
,
o
,
REDIS_LIST
))
return
;
list
=
o
->
ptr
;
if
(
where
==
REDIS_HEAD
)
ln
=
listFirst
(
list
);
else
ln
=
listLast
(
list
);
robj
*
o
=
lookupKeyWriteOrReply
(
c
,
c
->
argv
[
1
],
shared
.
nullbulk
);
if
(
o
==
NULL
||
checkType
(
c
,
o
,
REDIS_LIST
))
return
;
if
(
ln
==
NULL
)
{
robj
*
value
=
lPop
(
o
,
where
);
if
(
value
==
NULL
)
{
addReply
(
c
,
shared
.
nullbulk
);
}
else
{
robj
*
ele
=
listNodeValue
(
ln
);
addReplyBulk
(
c
,
ele
);
listDelNode
(
list
,
ln
);
if
(
listLength
(
list
)
==
0
)
deleteKey
(
c
->
db
,
c
->
argv
[
1
]);
addReplyBulk
(
c
,
value
);
decrRefCount
(
value
);
if
(
lLength
(
o
)
==
0
)
deleteKey
(
c
->
db
,
c
->
argv
[
1
]);
server
.
dirty
++
;
}
}
...
...
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