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3be4b1d4
TDengine
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体验新版 GitCode,发现更多精彩内容 >>
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3be4b1d4
编写于
9月 27, 2022
作者:
H
Hongze Cheng
浏览文件
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电子邮件补丁
差异文件
finish stream compression
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faea22cc
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1
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Showing
1 changed file
with
59 addition
and
1 deletion
+59
-1
source/util/src/tcompression.c
source/util/src/tcompression.c
+59
-1
未找到文件。
source/util/src/tcompression.c
浏览文件 @
3be4b1d4
...
...
@@ -1392,7 +1392,40 @@ static int32_t tCompIntSwitchToCopy(SCompressor *pCmprsor) {
if
(
pCmprsor
->
nVal
==
0
)
goto
_exit
;
// todo
int32_t
size
=
DATA_TYPE_INFO
[
pCmprsor
->
type
].
bytes
*
pCmprsor
->
nVal
+
1
;
if
(
pCmprsor
->
autoAlloc
&&
(
code
=
tRealloc
(
&
pCmprsor
->
aBuf
[
0
],
size
)))
{
return
code
;
}
int32_t
n
=
1
;
int32_t
nBuf
=
1
;
int64_t
vPrev
=
0
;
for
(
int32_t
iVal
=
0
;
iVal
<
pCmprsor
->
nVal
;)
{
uint64_t
b
;
memcpy
(
&
b
,
pCmprsor
->
pBuf
+
n
,
sizeof
(
b
));
n
+=
sizeof
(
b
);
int32_t
i_selector
=
(
b
&
0xf
);
int32_t
nEle
=
SELECTOR_TO_ELEMS
[
i_selector
];
uint8_t
bits
=
BIT_PER_INTEGER
[
i_selector
];
for
(
int32_t
iEle
=
0
;
iEle
<
nEle
;
iEle
++
)
{
uint64_t
vZigzag
=
(
b
>>
(
bits
*
iEle
+
4
))
&
(((
uint64_t
)
1
<<
bits
)
-
1
);
int64_t
diff
=
ZIGZAG_DECODE
(
int64_t
,
vZigzag
);
vPrev
=
diff
+
vPrev
;
memcpy
(
pCmprsor
->
aBuf
[
0
]
+
nBuf
,
&
vPrev
,
DATA_TYPE_INFO
[
pCmprsor
->
type
].
bytes
);
nBuf
+=
DATA_TYPE_INFO
[
pCmprsor
->
type
].
bytes
;
}
iVal
+=
nEle
;
ASSERT
(
iVal
<=
pCmprsor
->
nVal
);
}
ASSERT
(
n
==
pCmprsor
->
nBuf
&&
nBuf
==
size
);
uint8_t
*
pBuf
=
pCmprsor
->
pBuf
;
pCmprsor
->
pBuf
=
pCmprsor
->
aBuf
[
0
];
pCmprsor
->
aBuf
[
0
]
=
pBuf
;
pCmprsor
->
nBuf
=
size
;
_exit:
pCmprsor
->
pBuf
[
0
]
=
1
;
...
...
@@ -1480,6 +1513,31 @@ static int32_t tCompInt(SCompressor *pCmprsor, const void *pData, int32_t nData)
static
int32_t
tCompIntEnd
(
SCompressor
*
pCmprsor
,
const
uint8_t
**
ppData
,
int32_t
*
nData
)
{
int32_t
code
=
0
;
for
(;;)
{
int32_t
nEle
=
(
pCmprsor
->
i_end
+
241
-
pCmprsor
->
i_start
)
%
241
;
if
(
nEle
==
0
)
break
;
while
(
nEle
<
SELECTOR_TO_ELEMS
[
pCmprsor
->
i_selector
])
{
pCmprsor
->
i_selector
++
;
}
nEle
=
SELECTOR_TO_ELEMS
[
pCmprsor
->
i_selector
];
if
(
pCmprsor
->
autoAlloc
&&
(
code
=
tRealloc
(
&
pCmprsor
->
pBuf
,
pCmprsor
->
nBuf
+
sizeof
(
uint64_t
))))
{
return
code
;
}
uint64_t
*
bp
=
(
uint64_t
*
)(
pCmprsor
->
pBuf
+
pCmprsor
->
nBuf
);
pCmprsor
->
nBuf
+=
sizeof
(
uint64_t
);
bp
[
0
]
=
pCmprsor
->
i_selector
;
uint8_t
bits
=
BIT_PER_INTEGER
[
pCmprsor
->
i_selector
];
for
(
int32_t
iVal
=
0
;
iVal
<
nEle
;
iVal
++
)
{
bp
[
0
]
|=
((
pCmprsor
->
i_aZigzag
[
pCmprsor
->
i_start
]
&
((((
uint64_t
)
1
)
<<
bits
)
-
1
))
<<
(
bits
*
iVal
+
4
));
pCmprsor
->
i_start
=
(
pCmprsor
->
i_start
+
1
)
%
241
;
}
pCmprsor
->
i_selector
=
0
;
}
if
(
pCmprsor
->
nBuf
>=
DATA_TYPE_INFO
[
pCmprsor
->
type
].
bytes
*
pCmprsor
->
nVal
+
1
&&
pCmprsor
->
pBuf
[
0
]
==
0
)
{
code
=
tCompIntSwitchToCopy
(
pCmprsor
);
if
(
code
)
return
code
;
...
...
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