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ruanhaishen
redis
Commits
39191553
Commit
39191553
authored
Mar 03, 2010
by
antirez
Browse files
initial implementation of SUBSTR
parent
9693e4f0
Changes
2
Hide whitespace changes
Inline
Side-by-side
redis-cli.c
View file @
39191553
...
...
@@ -65,6 +65,7 @@ static struct redisCommand cmdTable[] = {
{
"set"
,
3
,
REDIS_CMD_BULK
},
{
"setnx"
,
3
,
REDIS_CMD_BULK
},
{
"append"
,
3
,
REDIS_CMD_BULK
},
{
"substr"
,
4
,
REDIS_CMD_INLINE
},
{
"del"
,
-
2
,
REDIS_CMD_INLINE
},
{
"exists"
,
2
,
REDIS_CMD_INLINE
},
{
"incr"
,
2
,
REDIS_CMD_INLINE
},
...
...
redis.c
View file @
39191553
...
...
@@ -659,6 +659,7 @@ static void discardCommand(redisClient *c);
static
void
blpopCommand
(
redisClient
*
c
);
static
void
brpopCommand
(
redisClient
*
c
);
static
void
appendCommand
(
redisClient
*
c
);
static
void
substrCommand
(
redisClient
*
c
);
static
void
zrankCommand
(
redisClient
*
c
);
/*================================= Globals ================================= */
...
...
@@ -670,6 +671,7 @@ static struct redisCommand cmdTable[] = {
{
"set"
,
setCommand
,
3
,
REDIS_CMD_BULK
|
REDIS_CMD_DENYOOM
,
0
,
0
,
0
},
{
"setnx"
,
setnxCommand
,
3
,
REDIS_CMD_BULK
|
REDIS_CMD_DENYOOM
,
0
,
0
,
0
},
{
"append"
,
appendCommand
,
3
,
REDIS_CMD_BULK
|
REDIS_CMD_DENYOOM
,
1
,
1
,
1
},
{
"substr"
,
substrCommand
,
4
,
REDIS_CMD_INLINE
,
1
,
1
,
1
},
{
"del"
,
delCommand
,
-
2
,
REDIS_CMD_INLINE
,
0
,
0
,
0
},
{
"exists"
,
existsCommand
,
2
,
REDIS_CMD_INLINE
,
1
,
1
,
1
},
{
"incr"
,
incrCommand
,
2
,
REDIS_CMD_INLINE
|
REDIS_CMD_DENYOOM
,
1
,
1
,
1
},
...
...
@@ -3764,6 +3766,45 @@ static void appendCommand(redisClient *c) {
addReplySds
(
c
,
sdscatprintf
(
sdsempty
(),
":%lu
\r\n
"
,(
unsigned
long
)
totlen
));
}
static
void
substrCommand
(
redisClient
*
c
)
{
robj
*
o
;
long
start
=
atoi
(
c
->
argv
[
2
]
->
ptr
);
long
end
=
atoi
(
c
->
argv
[
3
]
->
ptr
);
o
=
lookupKeyRead
(
c
->
db
,
c
->
argv
[
1
]);
if
(
o
==
NULL
)
{
addReply
(
c
,
shared
.
nullbulk
);
}
else
{
if
(
o
->
type
!=
REDIS_STRING
)
{
addReply
(
c
,
shared
.
wrongtypeerr
);
}
else
{
size_t
rangelen
,
strlen
=
sdslen
(
o
->
ptr
);
sds
range
;
/* convert negative indexes */
if
(
start
<
0
)
start
=
strlen
+
start
;
if
(
end
<
0
)
end
=
strlen
+
end
;
if
(
start
<
0
)
start
=
0
;
if
(
end
<
0
)
end
=
0
;
/* indexes sanity checks */
if
(
start
>
end
||
(
size_t
)
start
>=
strlen
)
{
/* Out of range start or start > end result in null reply */
addReply
(
c
,
shared
.
nullbulk
);
return
;
}
if
((
size_t
)
end
>=
strlen
)
end
=
strlen
-
1
;
rangelen
=
(
end
-
start
)
+
1
;
/* Return the result */
addReplySds
(
c
,
sdscatprintf
(
sdsempty
(),
"$%lu
\r\n
"
,
rangelen
));
range
=
sdsnewlen
((
char
*
)
o
->
ptr
+
start
,
rangelen
);
addReplySds
(
c
,
range
);
addReply
(
c
,
shared
.
crlf
);
}
}
}
/* ========================= Type agnostic commands ========================= */
static
void
delCommand
(
redisClient
*
c
)
{
...
...
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