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ruanhaishen
hiredis
Commits
d76e13b6
Commit
d76e13b6
authored
Jul 25, 2015
by
clark.kang
Committed by
Jan-Erik Rediger
Apr 20, 2016
Browse files
apply sds from redis
parent
1b8ed388
Changes
2
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sds.c
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d76e13b6
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sds.h
View file @
d76e13b6
/* SDS
(Simple Dynamic Strings)
, A C dynamic strings library
.
/* SDS
Lib
, A C dynamic strings library
*
* Copyright (c) 2006-201
4
, Salvatore Sanfilippo <antirez at gmail dot com>
* Copyright (c) 2006-201
0
, Salvatore Sanfilippo <antirez at gmail dot com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
...
...
@@ -35,35 +35,188 @@
#include <sys/types.h>
#include <stdarg.h>
#ifdef _MSC_VER
#include "win32.h"
#endif
#include <stdint.h>
typedef
char
*
sds
;
struct
sdshdr
{
int
len
;
int
free
;
/* Note: sdshdr5 is never used, we just access the flags byte directly.
* However is here to document the layout of type 5 SDS strings. */
struct
__attribute__
((
__packed__
))
sdshdr5
{
unsigned
char
flags
;
/* 3 lsb of type, and 5 msb of string length */
char
buf
[];
};
struct
__attribute__
((
__packed__
))
sdshdr8
{
uint8_t
len
;
/* used */
uint8_t
alloc
;
/* excluding the header and null terminator */
unsigned
char
flags
;
/* 3 lsb of type, 5 unused bits */
char
buf
[];
};
struct
__attribute__
((
__packed__
))
sdshdr16
{
uint16_t
len
;
/* used */
uint16_t
alloc
;
/* excluding the header and null terminator */
unsigned
char
flags
;
/* 3 lsb of type, 5 unused bits */
char
buf
[];
};
struct
__attribute__
((
__packed__
))
sdshdr32
{
uint32_t
len
;
/* used */
uint32_t
alloc
;
/* excluding the header and null terminator */
unsigned
char
flags
;
/* 3 lsb of type, 5 unused bits */
char
buf
[];
};
struct
__attribute__
((
__packed__
))
sdshdr64
{
uint64_t
len
;
/* used */
uint64_t
alloc
;
/* excluding the header and null terminator */
unsigned
char
flags
;
/* 3 lsb of type, 5 unused bits */
char
buf
[];
};
#define SDS_TYPE_5 0
#define SDS_TYPE_8 1
#define SDS_TYPE_16 2
#define SDS_TYPE_32 3
#define SDS_TYPE_64 4
#define SDS_TYPE_MASK 7
#define SDS_TYPE_BITS 3
#define SDS_HDR_VAR(T,s) struct sdshdr##T *sh = (void*)((s)-(sizeof(struct sdshdr##T)));
#define SDS_HDR(T,s) ((struct sdshdr##T *)((s)-(sizeof(struct sdshdr##T))))
#define SDS_TYPE_5_LEN(f) ((f)>>SDS_TYPE_BITS)
static
inline
size_t
sdslen
(
const
sds
s
)
{
struct
sdshdr
*
sh
=
(
struct
sdshdr
*
)(
s
-
sizeof
*
sh
);
return
sh
->
len
;
unsigned
char
flags
=
s
[
-
1
];
switch
(
flags
&
SDS_TYPE_MASK
)
{
case
SDS_TYPE_5
:
return
SDS_TYPE_5_LEN
(
flags
);
case
SDS_TYPE_8
:
return
SDS_HDR
(
8
,
s
)
->
len
;
case
SDS_TYPE_16
:
return
SDS_HDR
(
16
,
s
)
->
len
;
case
SDS_TYPE_32
:
return
SDS_HDR
(
32
,
s
)
->
len
;
case
SDS_TYPE_64
:
return
SDS_HDR
(
64
,
s
)
->
len
;
}
return
0
;
}
static
inline
size_t
sdsavail
(
const
sds
s
)
{
struct
sdshdr
*
sh
=
(
struct
sdshdr
*
)(
s
-
sizeof
*
sh
);
return
sh
->
free
;
unsigned
char
flags
=
s
[
-
1
];
switch
(
flags
&
SDS_TYPE_MASK
)
{
case
SDS_TYPE_5
:
{
return
0
;
}
case
SDS_TYPE_8
:
{
SDS_HDR_VAR
(
8
,
s
);
return
sh
->
alloc
-
sh
->
len
;
}
case
SDS_TYPE_16
:
{
SDS_HDR_VAR
(
16
,
s
);
return
sh
->
alloc
-
sh
->
len
;
}
case
SDS_TYPE_32
:
{
SDS_HDR_VAR
(
32
,
s
);
return
sh
->
alloc
-
sh
->
len
;
}
case
SDS_TYPE_64
:
{
SDS_HDR_VAR
(
64
,
s
);
return
sh
->
alloc
-
sh
->
len
;
}
}
return
0
;
}
static
inline
void
sdssetlen
(
sds
s
,
size_t
newlen
)
{
unsigned
char
flags
=
s
[
-
1
];
switch
(
flags
&
SDS_TYPE_MASK
)
{
case
SDS_TYPE_5
:
{
unsigned
char
*
fp
=
((
unsigned
char
*
)
s
)
-
1
;
*
fp
=
SDS_TYPE_5
|
(
newlen
<<
SDS_TYPE_BITS
);
}
break
;
case
SDS_TYPE_8
:
SDS_HDR
(
8
,
s
)
->
len
=
newlen
;
break
;
case
SDS_TYPE_16
:
SDS_HDR
(
16
,
s
)
->
len
=
newlen
;
break
;
case
SDS_TYPE_32
:
SDS_HDR
(
32
,
s
)
->
len
=
newlen
;
break
;
case
SDS_TYPE_64
:
SDS_HDR
(
64
,
s
)
->
len
=
newlen
;
break
;
}
}
static
inline
void
sdsinclen
(
sds
s
,
size_t
inc
)
{
unsigned
char
flags
=
s
[
-
1
];
switch
(
flags
&
SDS_TYPE_MASK
)
{
case
SDS_TYPE_5
:
{
unsigned
char
*
fp
=
((
unsigned
char
*
)
s
)
-
1
;
unsigned
char
newlen
=
SDS_TYPE_5_LEN
(
flags
)
+
inc
;
*
fp
=
SDS_TYPE_5
|
(
newlen
<<
SDS_TYPE_BITS
);
}
break
;
case
SDS_TYPE_8
:
SDS_HDR
(
8
,
s
)
->
len
+=
inc
;
break
;
case
SDS_TYPE_16
:
SDS_HDR
(
16
,
s
)
->
len
+=
inc
;
break
;
case
SDS_TYPE_32
:
SDS_HDR
(
32
,
s
)
->
len
+=
inc
;
break
;
case
SDS_TYPE_64
:
SDS_HDR
(
64
,
s
)
->
len
+=
inc
;
break
;
}
}
/* sdsalloc() = sdsavail() + sdslen() */
static
inline
size_t
sdsalloc
(
const
sds
s
)
{
unsigned
char
flags
=
s
[
-
1
];
switch
(
flags
&
SDS_TYPE_MASK
)
{
case
SDS_TYPE_5
:
return
SDS_TYPE_5_LEN
(
flags
);
case
SDS_TYPE_8
:
return
SDS_HDR
(
8
,
s
)
->
alloc
;
case
SDS_TYPE_16
:
return
SDS_HDR
(
16
,
s
)
->
alloc
;
case
SDS_TYPE_32
:
return
SDS_HDR
(
32
,
s
)
->
alloc
;
case
SDS_TYPE_64
:
return
SDS_HDR
(
64
,
s
)
->
alloc
;
}
return
0
;
}
static
inline
void
sdssetalloc
(
sds
s
,
size_t
newlen
)
{
unsigned
char
flags
=
s
[
-
1
];
switch
(
flags
&
SDS_TYPE_MASK
)
{
case
SDS_TYPE_5
:
/* Nothing to do, this type has no total allocation info. */
break
;
case
SDS_TYPE_8
:
SDS_HDR
(
8
,
s
)
->
alloc
=
newlen
;
break
;
case
SDS_TYPE_16
:
SDS_HDR
(
16
,
s
)
->
alloc
=
newlen
;
break
;
case
SDS_TYPE_32
:
SDS_HDR
(
32
,
s
)
->
alloc
=
newlen
;
break
;
case
SDS_TYPE_64
:
SDS_HDR
(
64
,
s
)
->
alloc
=
newlen
;
break
;
}
}
sds
sdsnewlen
(
const
void
*
init
,
size_t
initlen
);
sds
sdsnew
(
const
char
*
init
);
sds
sdsempty
(
void
);
size_t
sdslen
(
const
sds
s
);
sds
sdsdup
(
const
sds
s
);
void
sdsfree
(
sds
s
);
size_t
sdsavail
(
const
sds
s
);
sds
sdsgrowzero
(
sds
s
,
size_t
len
);
sds
sdscatlen
(
sds
s
,
const
void
*
t
,
size_t
len
);
sds
sdscat
(
sds
s
,
const
char
*
t
);
...
...
@@ -80,7 +233,7 @@ sds sdscatprintf(sds s, const char *fmt, ...);
#endif
sds
sdscatfmt
(
sds
s
,
char
const
*
fmt
,
...);
void
sdstrim
(
sds
s
,
const
char
*
cset
);
sds
sdstrim
(
sds
s
,
const
char
*
cset
);
void
sdsrange
(
sds
s
,
int
start
,
int
end
);
void
sdsupdatelen
(
sds
s
);
void
sdsclear
(
sds
s
);
...
...
@@ -93,8 +246,7 @@ sds sdsfromlonglong(long long value);
sds
sdscatrepr
(
sds
s
,
const
char
*
p
,
size_t
len
);
sds
*
sdssplitargs
(
const
char
*
line
,
int
*
argc
);
sds
sdsmapchars
(
sds
s
,
const
char
*
from
,
const
char
*
to
,
size_t
setlen
);
sds
sdsjoin
(
char
**
argv
,
int
argc
,
char
*
sep
,
size_t
seplen
);
sds
sdsjoinsds
(
sds
*
argv
,
int
argc
,
const
char
*
sep
,
size_t
seplen
);
sds
sdsjoin
(
char
**
argv
,
int
argc
,
char
*
sep
);
/* Low level functions exposed to the user API */
sds
sdsMakeRoomFor
(
sds
s
,
size_t
addlen
);
...
...
@@ -102,4 +254,8 @@ void sdsIncrLen(sds s, int incr);
sds
sdsRemoveFreeSpace
(
sds
s
);
size_t
sdsAllocSize
(
sds
s
);
#ifdef REDIS_TEST
int
sdsTest
(
int
argc
,
char
*
argv
[]);
#endif
#endif
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