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ruanhaishen
redis
Commits
2165ac55
Commit
2165ac55
authored
Mar 09, 2011
by
Pieter Noordhuis
Browse files
Helpers to move around in encoded sorted set
parent
f8224a4f
Changes
1
Hide whitespace changes
Inline
Side-by-side
src/t_zset.c
View file @
2165ac55
...
...
@@ -454,6 +454,44 @@ unsigned int zzlLength(robj *zobj) {
return
ziplistLen
(
zl
)
/
2
;
}
/* Move to next entry based on the values in eptr and sptr. Both are set to
* NULL when there is no next entry. */
void
zzlNext
(
unsigned
char
*
zl
,
unsigned
char
**
eptr
,
unsigned
char
**
sptr
)
{
unsigned
char
*
_eptr
,
*
_sptr
;
redisAssert
(
*
eptr
!=
NULL
&&
*
sptr
!=
NULL
);
_eptr
=
ziplistNext
(
zl
,
*
sptr
);
if
(
_eptr
!=
NULL
)
{
_sptr
=
ziplistNext
(
zl
,
_eptr
);
redisAssert
(
_sptr
!=
NULL
);
}
else
{
/* No next entry. */
_sptr
=
NULL
;
}
*
eptr
=
_eptr
;
*
sptr
=
_sptr
;
}
/* Move to the previous entry based on the values in eptr and sptr. Both are
* set to NULL when there is no next entry. */
void
zzlPrev
(
unsigned
char
*
zl
,
unsigned
char
**
eptr
,
unsigned
char
**
sptr
)
{
unsigned
char
*
_eptr
,
*
_sptr
;
redisAssert
(
*
eptr
!=
NULL
&&
*
sptr
!=
NULL
);
_sptr
=
ziplistPrev
(
zl
,
*
eptr
);
if
(
_sptr
!=
NULL
)
{
_eptr
=
ziplistPrev
(
zl
,
_sptr
);
redisAssert
(
_eptr
!=
NULL
);
}
else
{
/* No previous entry. */
_eptr
=
NULL
;
}
*
eptr
=
_eptr
;
*
sptr
=
_sptr
;
}
/* Returns if there is a part of the zset is in range. Should only be used
* internally by zzlFirstInRange and zzlLastInRange. */
int
zzlIsInRange
(
unsigned
char
*
zl
,
zrangespec
*
range
)
{
...
...
@@ -1218,35 +1256,24 @@ void zrangeGenericCommand(redisClient *c, int reverse) {
else
eptr
=
ziplistIndex
(
zl
,
2
*
start
);
redisAssert
(
eptr
!=
NULL
);
sptr
=
ziplistNext
(
zl
,
eptr
);
while
(
rangelen
--
)
{
redisAssert
(
eptr
!=
NULL
);
redisAssert
(
eptr
!=
NULL
&&
sptr
!=
NULL
);
redisAssert
(
ziplistGet
(
eptr
,
&
vstr
,
&
vlen
,
&
vlong
));
if
(
vstr
==
NULL
)
addReplyBulkLongLong
(
c
,
vlong
);
else
addReplyBulkCBuffer
(
c
,
vstr
,
vlen
);
if
(
withscores
)
{
sptr
=
ziplistNext
(
zl
,
eptr
);
redisAssert
(
sptr
!=
NULL
);
if
(
withscores
)
addReplyDouble
(
c
,
zzlGetScore
(
sptr
));
}
if
(
reverse
)
{
/* Move to previous element by moving to the score of previous
* element. When NULL, we know there also is no element. */
sptr
=
ziplistPrev
(
zl
,
eptr
);
if
(
sptr
!=
NULL
)
{
eptr
=
ziplistPrev
(
zl
,
sptr
);
redisAssert
(
eptr
!=
NULL
);
}
else
{
eptr
=
NULL
;
}
}
else
{
sptr
=
ziplistNext
(
zl
,
eptr
);
redisAssert
(
sptr
!=
NULL
);
eptr
=
ziplistNext
(
zl
,
sptr
);
}
if
(
reverse
)
zzlPrev
(
zl
,
&
eptr
,
&
sptr
);
else
zzlNext
(
zl
,
&
eptr
,
&
sptr
);
}
}
else
if
(
zobj
->
encoding
==
REDIS_ENCODING_RAW
)
{
...
...
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