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ruanhaishen
redis
Commits
9a68cf91
Commit
9a68cf91
authored
Nov 21, 2010
by
Pieter Noordhuis
Browse files
Wrapper around fwrite to make API consistent
parent
8a623a98
Changes
1
Hide whitespace changes
Inline
Side-by-side
src/rdb.c
View file @
9a68cf91
...
...
@@ -9,15 +9,22 @@
#include <arpa/inet.h>
#include <sys/stat.h>
/* Convenience wrapper around fwrite, that returns the number of bytes written
* to the file instead of the number of objects (see fwrite(3)) and -1 in the
* case of an error. It also supports a NULL *fp to skip writing altogether
* instead of writing to /dev/null. */
static
int
rdbWriteRaw
(
FILE
*
fp
,
void
*
p
,
size_t
len
)
{
if
(
fp
!=
NULL
&&
fwrite
(
p
,
len
,
1
,
fp
)
==
0
)
return
-
1
;
return
len
;
}
int
rdbSaveType
(
FILE
*
fp
,
unsigned
char
type
)
{
if
(
fwrite
(
&
type
,
1
,
1
,
fp
)
==
0
)
return
-
1
;
return
1
;
/* bytes written */
return
rdbWriteRaw
(
fp
,
&
type
,
1
);
}
int
rdbSaveTime
(
FILE
*
fp
,
time_t
t
)
{
int32_t
t32
=
(
int32_t
)
t
;
if
(
fwrite
(
&
t32
,
4
,
1
,
fp
)
==
0
)
return
-
1
;
return
4
;
/* bytes written */
return
rdbWriteRaw
(
fp
,
&
t32
,
4
);
}
/* check rdbLoadLen() comments for more info */
...
...
@@ -28,20 +35,20 @@ int rdbSaveLen(FILE *fp, uint32_t len) {
if
(
len
<
(
1
<<
6
))
{
/* Save a 6 bit len */
buf
[
0
]
=
(
len
&
0xFF
)
|
(
REDIS_RDB_6BITLEN
<<
6
);
if
(
fwrite
(
buf
,
1
,
1
,
fp
)
==
0
)
return
-
1
;
if
(
rdbWriteRaw
(
fp
,
buf
,
1
)
==
-
1
)
return
-
1
;
nwritten
=
1
;
}
else
if
(
len
<
(
1
<<
14
))
{
/* Save a 14 bit len */
buf
[
0
]
=
((
len
>>
8
)
&
0xFF
)
|
(
REDIS_RDB_14BITLEN
<<
6
);
buf
[
1
]
=
len
&
0xFF
;
if
(
fwrite
(
buf
,
2
,
1
,
fp
)
==
0
)
return
-
1
;
if
(
rdbWriteRaw
(
fp
,
buf
,
2
)
==
-
1
)
return
-
1
;
nwritten
=
2
;
}
else
{
/* Save a 32 bit len */
buf
[
0
]
=
(
REDIS_RDB_32BITLEN
<<
6
);
if
(
fwrite
(
buf
,
1
,
1
,
fp
)
==
0
)
return
-
1
;
if
(
rdbWriteRaw
(
fp
,
buf
,
1
)
==
-
1
)
return
-
1
;
len
=
htonl
(
len
);
if
(
fwrite
(
&
len
,
4
,
1
,
fp
)
==
0
)
return
-
1
;
if
(
rdbWriteRaw
(
fp
,
&
len
,
4
)
==
-
1
)
return
-
1
;
nwritten
=
1
+
4
;
}
return
nwritten
;
...
...
@@ -111,8 +118,8 @@ int rdbSaveLzfStringObject(FILE *fp, unsigned char *s, size_t len) {
}
/* Data compressed! Let's save it on disk */
byte
=
(
REDIS_RDB_ENCVAL
<<
6
)
|
REDIS_RDB_ENC_LZF
;
if
(
fwrite
(
&
byte
,
1
,
1
,
fp
)
==
0
)
goto
writeerr
;
nwritten
+=
1
;
if
(
(
n
=
rdbWriteRaw
(
fp
,
&
byte
,
1
)
)
==
-
1
)
goto
writeerr
;
nwritten
+=
n
;
if
((
n
=
rdbSaveLen
(
fp
,
comprlen
))
==
-
1
)
goto
writeerr
;
nwritten
+=
n
;
...
...
@@ -120,8 +127,8 @@ int rdbSaveLzfStringObject(FILE *fp, unsigned char *s, size_t len) {
if
((
n
=
rdbSaveLen
(
fp
,
len
))
==
-
1
)
goto
writeerr
;
nwritten
+=
n
;
if
(
fwrite
(
out
,
comprlen
,
1
,
fp
)
==
0
)
goto
writeerr
;
nwritten
+=
comprle
n
;
if
(
(
n
=
rdbWriteRaw
(
fp
,
out
,
comprlen
)
)
==
-
1
)
goto
writeerr
;
nwritten
+=
n
;
zfree
(
out
);
return
nwritten
;
...
...
@@ -141,7 +148,7 @@ int rdbSaveRawString(FILE *fp, unsigned char *s, size_t len) {
if
(
len
<=
11
)
{
unsigned
char
buf
[
5
];
if
((
enclen
=
rdbTryIntegerEncoding
((
char
*
)
s
,
len
,
buf
))
>
0
)
{
if
(
fwrite
(
buf
,
enclen
,
1
,
fp
)
==
0
)
return
-
1
;
if
(
rdbWriteRaw
(
fp
,
buf
,
enclen
)
==
-
1
)
return
-
1
;
return
enclen
;
}
}
...
...
@@ -159,7 +166,7 @@ int rdbSaveRawString(FILE *fp, unsigned char *s, size_t len) {
if
((
n
=
rdbSaveLen
(
fp
,
len
))
==
-
1
)
return
-
1
;
nwritten
+=
n
;
if
(
len
>
0
)
{
if
(
fwrite
(
s
,
len
,
1
,
fp
)
==
0
)
return
-
1
;
if
(
rdbWriteRaw
(
fp
,
s
,
len
)
==
-
1
)
return
-
1
;
nwritten
+=
len
;
}
return
nwritten
;
...
...
@@ -171,16 +178,15 @@ int rdbSaveLongLongAsStringObject(FILE *fp, long long value) {
int
n
,
nwritten
=
0
;
int
enclen
=
rdbEncodeInteger
(
value
,
buf
);
if
(
enclen
>
0
)
{
if
(
fwrite
(
buf
,
enclen
,
1
,
fp
)
==
0
)
return
-
1
;
nwritten
=
enclen
;
return
rdbWriteRaw
(
fp
,
buf
,
enclen
);
}
else
{
/* Encode as string */
enclen
=
ll2string
((
char
*
)
buf
,
32
,
value
);
redisAssert
(
enclen
<
32
);
if
((
n
=
rdbSaveLen
(
fp
,
enclen
))
==
-
1
)
return
-
1
;
nwritten
+=
n
;
if
(
fwrite
(
buf
,
enclen
,
1
,
fp
)
==
0
)
return
-
1
;
nwritten
+=
encle
n
;
if
(
(
n
=
rdbWriteRaw
(
fp
,
buf
,
enclen
)
)
==
-
1
)
return
-
1
;
nwritten
+=
n
;
}
return
nwritten
;
}
...
...
@@ -236,8 +242,7 @@ int rdbSaveDoubleValue(FILE *fp, double val) {
buf
[
0
]
=
strlen
((
char
*
)
buf
+
1
);
len
=
buf
[
0
]
+
1
;
}
if
(
fwrite
(
buf
,
len
,
1
,
fp
)
==
0
)
return
-
1
;
return
len
;
return
rdbWriteRaw
(
fp
,
buf
,
len
);
}
/* Save a Redis object. */
...
...
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