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redis
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2f444526
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体验新版 GitCode,发现更多精彩内容 >>
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2f444526
编写于
8月 13, 2012
作者:
P
Pieter Noordhuis
提交者:
antirez
8月 22, 2012
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Set p to its new offset before modifying it
上级
89bf6f58
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
8 addition
and
7 deletion
+8
-7
src/ziplist.c
src/ziplist.c
+8
-7
未找到文件。
src/ziplist.c
浏览文件 @
2f444526
...
...
@@ -500,12 +500,13 @@ static unsigned char *__ziplistDelete(unsigned char *zl, unsigned char *p, unsig
totlen
=
p
-
first
.
p
;
if
(
totlen
>
0
)
{
if
(
p
[
0
]
!=
ZIP_END
)
{
/*
Tricky: storing the prevlen in this entry might reduce or
*
increase the number of bytes needed, compared to the current
*
prevlen. Note that we can always store this length because
*
it was previously stored by an entry that is
being deleted. */
/*
Storing `prevrawlen` in this entry may increase or decrease the
*
number of bytes required compare to the current `prevrawlen`.
*
There always is room to store this, because it was previously
*
stored by an entry that is now
being deleted. */
nextdiff
=
zipPrevLenByteDiff
(
p
,
first
.
prevrawlen
);
zipPrevEncodeLength
(
p
-
nextdiff
,
first
.
prevrawlen
);
p
-=
nextdiff
;
zipPrevEncodeLength
(
p
,
first
.
prevrawlen
);
/* Update offset for tail */
ZIPLIST_TAIL_OFFSET
(
zl
)
=
...
...
@@ -521,8 +522,8 @@ static unsigned char *__ziplistDelete(unsigned char *zl, unsigned char *p, unsig
}
/* Move tail to the front of the ziplist */
memmove
(
first
.
p
,
p
-
nextdiff
,
intrev32ifbe
(
ZIPLIST_BYTES
(
zl
))
-
(
p
-
zl
)
-
1
+
nextdiff
);
memmove
(
first
.
p
,
p
,
intrev32ifbe
(
ZIPLIST_BYTES
(
zl
))
-
(
p
-
zl
)
-
1
);
}
else
{
/* The entire tail was deleted. No need to move memory. */
ZIPLIST_TAIL_OFFSET
(
zl
)
=
...
...
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