Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
M
MariaDB
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Analytics
Analytics
CI / CD
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
nexedi
MariaDB
Commits
377aedfb
Commit
377aedfb
authored
Dec 08, 2004
by
unknown
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
ndb - Fix arbitrary sized bitfields
ndb/src/common/util/Bitmask.cpp: Fix arbitrary sized bitfields
parent
c43c904f
Changes
1
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
52 additions
and
39 deletions
+52
-39
ndb/src/common/util/Bitmask.cpp
ndb/src/common/util/Bitmask.cpp
+52
-39
No files found.
ndb/src/common/util/Bitmask.cpp
View file @
377aedfb
...
@@ -11,7 +11,7 @@ void print(const Uint32 src[], Uint32 len, Uint32 pos = 0)
...
@@ -11,7 +11,7 @@ void print(const Uint32 src[], Uint32 len, Uint32 pos = 0)
printf
(
"1"
);
printf
(
"1"
);
else
else
printf
(
"0"
);
printf
(
"0"
);
if
((
i
&
7
)
==
7
)
if
((
i
&
31
)
==
31
)
printf
(
" "
);
printf
(
" "
);
}
}
}
}
...
@@ -19,42 +19,46 @@ void print(const Uint32 src[], Uint32 len, Uint32 pos = 0)
...
@@ -19,42 +19,46 @@ void print(const Uint32 src[], Uint32 len, Uint32 pos = 0)
#ifndef __TEST_BITMASK__
#ifndef __TEST_BITMASK__
void
void
BitmaskImpl
::
getFieldImpl
(
const
Uint32
src
[],
BitmaskImpl
::
getFieldImpl
(
const
Uint32
src
[],
unsigned
shift
,
unsigned
len
,
Uint32
dst
[])
unsigned
shift
L
,
unsigned
len
,
Uint32
dst
[])
{
{
assert
(
shift
<
32
);
assert
(
shiftL
<
32
);
if
(
len
<=
(
32
-
shift
))
unsigned
shiftR
=
32
-
shiftL
;
{
while
(
len
>=
32
)
*
dst
++
|=
((
*
src
)
&
((
1
<<
len
)
-
1
))
<<
shift
;
}
else
{
{
abort
();
*
dst
++
|=
(
*
src
)
<<
shiftL
;
while
(
len
>
32
)
*
dst
=
shiftL
?
(
*
src
)
>>
shiftR
:
0
;
{
src
++
;
*
dst
++
|=
(
*
src
)
<<
shift
;
len
-=
32
;
*
dst
=
(
*
src
++
)
>>
(
32
-
shift
);
len
-=
32
;
}
}
}
*
dst
++
|=
(
*
src
)
<<
shiftL
;
*
dst
=
shiftL
?
((
*
src
)
>>
shiftR
)
&
((
1
<<
len
)
-
1
)
:
0
;
}
}
void
void
BitmaskImpl
::
setFieldImpl
(
Uint32
dst
[],
BitmaskImpl
::
setFieldImpl
(
Uint32
dst
[],
unsigned
shift
,
unsigned
len
,
const
Uint32
src
[])
unsigned
shift
L
,
unsigned
len
,
const
Uint32
src
[])
{
{
assert
(
shift
<
32
);
/**
*
* abcd ef00
* 00ab cdef
*/
assert
(
shiftL
<
32
);
unsigned
shiftR
=
32
-
shiftL
;
Uint32
mask
;
while
(
len
>=
32
)
if
(
len
<
(
32
-
shift
))
{
mask
=
(
1
<<
len
)
-
1
;
*
dst
=
(
*
dst
&
~
mask
)
|
(((
*
src
++
)
>>
shift
)
&
mask
);
}
else
{
{
abort
();
*
dst
=
(
*
src
++
)
>>
shiftL
;
*
dst
++
|=
shiftL
?
(
*
src
)
<<
shiftR
:
0
;
len
-=
32
;
}
}
Uint32
mask
=
((
1
<<
len
)
-
1
);
*
dst
=
(
*
dst
&
~
mask
);
*
dst
|=
((
*
src
++
)
>>
shiftL
)
&
mask
;
*
dst
|=
shiftL
?
((
*
src
)
<<
shiftR
)
&
mask
:
0
;
}
}
#else
#else
...
@@ -86,6 +90,19 @@ static void require(bool b)
...
@@ -86,6 +90,19 @@ static void require(bool b)
if
(
!
b
)
abort
();
if
(
!
b
)
abort
();
}
}
static
bool
cmp
(
const
Uint32
b1
[],
const
Uint32
b2
[],
Uint32
len
)
{
Uint32
sz32
=
(
len
+
31
)
>>
5
;
for
(
int
i
=
0
;
i
<
len
;
i
++
)
{
if
(
BitmaskImpl
::
get
(
sz32
,
b1
,
i
)
^
BitmaskImpl
::
get
(
sz32
,
b2
,
i
))
return
false
;
}
return
true
;
}
static
int
val_pos
=
0
;
static
int
val_pos
=
0
;
static
int
val
[]
=
{
384
,
241
,
32
,
static
int
val
[]
=
{
384
,
241
,
32
,
1
,
1
,
1
,
1
,
0
,
0
,
0
,
0
,
1
,
1
,
1
,
1
,
0
,
0
,
0
,
0
,
1
,
1
,
1
,
1
,
0
,
0
,
0
,
0
,
1
,
1
,
1
,
1
,
0
,
0
,
0
,
0
,
...
@@ -128,21 +145,21 @@ void simple(int pos, int size)
...
@@ -128,21 +145,21 @@ void simple(int pos, int size)
memset
(
src
,
0x0
,
sz
);
memset
(
src
,
0x0
,
sz
);
memset
(
dst
,
0x0
,
sz
);
memset
(
dst
,
0x0
,
sz
);
memset
(
mask
,
0x
0
,
sz
);
memset
(
mask
,
0x
FF
,
sz
);
rand
(
src
,
size
);
rand
(
src
,
size
);
BitmaskImpl
::
setField
(
sz32
,
mask
,
pos
,
size
,
src
);
BitmaskImpl
::
setField
(
sz32
,
mask
,
pos
,
size
,
src
);
BitmaskImpl
::
getField
(
sz32
,
mask
,
pos
,
size
,
dst
);
BitmaskImpl
::
getField
(
sz32
,
mask
,
pos
,
size
,
dst
);
printf
(
"src: "
);
print
(
src
,
size
);
printf
(
"
\n
"
);
printf
(
"src: "
);
print
(
src
,
size
);
printf
(
"
\n
"
);
printf
(
"msk: "
);
print
(
mask
,
s
ize
,
pos
);
printf
(
"
\n
"
);
printf
(
"msk: "
);
print
(
mask
,
s
z32
<<
5
);
printf
(
"
\n
"
);
printf
(
"dst: "
);
print
(
dst
,
size
);
printf
(
"
\n
"
);
printf
(
"dst: "
);
print
(
dst
,
size
);
printf
(
"
\n
"
);
require
(
memcmp
(
src
,
dst
,
sz
)
==
0
);
require
(
cmp
(
src
,
dst
,
size
)
);
};
};
static
void
static
void
do_test
(
int
bitmask_size
)
do_test
(
int
bitmask_size
)
{
{
#if 0
#if 0
simple(rand() % 33, (rand() %
31
)+1);
simple(rand() % 33, (rand() %
63
)+1);
#else
#else
Vector
<
Alloc
>
alloc_list
;
Vector
<
Alloc
>
alloc_list
;
bitmask_size
=
(
bitmask_size
+
31
)
&
~
31
;
bitmask_size
=
(
bitmask_size
+
31
)
&
~
31
;
...
@@ -186,10 +203,9 @@ do_test(int bitmask_size)
...
@@ -186,10 +203,9 @@ do_test(int bitmask_size)
{
{
printf
(
"freeing [ %d %d ]"
,
min
,
max
);
printf
(
"freeing [ %d %d ]"
,
min
,
max
);
printf
(
"- mask: "
);
printf
(
"- mask: "
);
for
(
size_t
k
=
0
;
k
<
(((
max
-
min
)
+
31
)
>>
5
);
k
++
)
print
(
tmp
.
getBase
(),
max
-
min
);
printf
(
"%.8x "
,
tmp
.
getBase
()[
k
]);
printf
(
" save: "
);
printf
(
"save: "
);
size_t
k
;
size_t
k
;
Alloc
&
a
=
alloc_list
[
j
];
Alloc
&
a
=
alloc_list
[
j
];
for
(
k
=
0
;
k
<
a
.
data
.
size
();
k
++
)
for
(
k
=
0
;
k
<
a
.
data
.
size
();
k
++
)
...
@@ -197,7 +213,7 @@ do_test(int bitmask_size)
...
@@ -197,7 +213,7 @@ do_test(int bitmask_size)
printf
(
"
\n
"
);
printf
(
"
\n
"
);
}
}
int
bytes
=
(
max
-
min
+
7
)
>>
3
;
int
bytes
=
(
max
-
min
+
7
)
>>
3
;
if
(
memcmp
(
tmp
.
getBase
(),
alloc_list
[
j
].
data
.
getBase
(),
bytes
)
!=
0
)
if
(
!
cmp
(
tmp
.
getBase
(),
alloc_list
[
j
].
data
.
getBase
(),
max
-
min
)
)
{
{
abort
();
abort
();
}
}
...
@@ -221,7 +237,6 @@ do_test(int bitmask_size)
...
@@ -221,7 +237,6 @@ do_test(int bitmask_size)
Uint32
sz
=
(
lrand
()
%
free
);
Uint32
sz
=
(
lrand
()
%
free
);
sz
=
sz
?
sz
:
1
;
sz
=
sz
?
sz
:
1
;
sz
=
(
sz
>
31
)
?
31
:
sz
;
Alloc
a
;
Alloc
a
;
a
.
pos
=
pos
;
a
.
pos
=
pos
;
a
.
size
=
sz
;
a
.
size
=
sz
;
...
@@ -237,9 +252,7 @@ do_test(int bitmask_size)
...
@@ -237,9 +252,7 @@ do_test(int bitmask_size)
if
(
DEBUG
)
if
(
DEBUG
)
{
{
printf
(
"- mask: "
);
printf
(
"- mask: "
);
size_t
k
;
print
(
a
.
data
.
getBase
(),
sz
);
for
(
k
=
0
;
k
<
a
.
data
.
size
();
k
++
)
printf
(
"%.8x "
,
a
.
data
[
k
]);
printf
(
"
\n
"
);
printf
(
"
\n
"
);
}
}
BitmaskImpl
::
setField
(
sz32
,
test_mask
.
getBase
(),
pos
,
sz
,
BitmaskImpl
::
setField
(
sz32
,
test_mask
.
getBase
(),
pos
,
sz
,
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment