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alpine
apk-tools
Commits
4aa80564
Commit
4aa80564
authored
Feb 08, 2012
by
Timo Teräs
Browse files
Options
Browse Files
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Plain Diff
blob: optimize digit and base64 decoding
parent
ac1a8ac7
Changes
1
Show whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
110 additions
and
41 deletions
+110
-41
src/blob.c
src/blob.c
+110
-41
No files found.
src/blob.c
View file @
4aa80564
...
...
@@ -159,15 +159,44 @@ int apk_blob_for_each_segment(apk_blob_t blob, const char *split,
return
0
;
}
static
inline
int
dx
(
int
c
)
static
unsigned
char
digitdecode
[]
=
{
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0x3e
,
0xff
,
0xff
,
0xff
,
0xff
,
0
,
1
,
2
,
3
,
4
,
5
,
6
,
7
,
8
,
9
,
0xff
,
0xff
,
0xff
,
0x00
,
0xff
,
0xff
,
0xff
,
0xa
,
0xb
,
0xc
,
0xd
,
0xe
,
0xf
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xa
,
0xb
,
0xc
,
0xd
,
0xe
,
0xf
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
};
static
inline
int
dx
(
unsigned
char
c
)
{
if
(
likely
(
c
>=
'0'
&&
c
<=
'9'
))
return
c
-
'0'
;
if
(
likely
(
c
>=
'a'
&&
c
<=
'f'
))
return
c
-
'a'
+
0xa
;
if
(
c
>=
'A'
&&
c
<=
'F'
)
return
c
-
'A'
+
0xa
;
return
-
1
;
return
digitdecode
[
c
];
}
void
apk_blob_push_blob
(
apk_blob_t
*
to
,
apk_blob_t
literal
)
...
...
@@ -298,7 +327,7 @@ unsigned int apk_blob_pull_uint(apk_blob_t *b, int radix)
val
=
0
;
while
(
b
->
len
&&
b
->
ptr
[
0
]
!=
0
)
{
ch
=
dx
(
b
->
ptr
[
0
]);
if
(
ch
<
0
||
ch
>=
radix
)
if
(
ch
>=
radix
)
break
;
val
*=
radix
;
val
+=
ch
;
...
...
@@ -322,7 +351,7 @@ void apk_blob_pull_csum(apk_blob_t *b, struct apk_checksum *csum)
return
;
}
if
(
dx
(
b
->
ptr
[
0
])
!=
-
1
)
{
if
(
dx
(
b
->
ptr
[
0
])
!=
0xff
)
{
/* Assume MD5 for backwards compatibility */
csum
->
type
=
APK_CHECKSUM_MD5
;
apk_blob_pull_hexdump
(
b
,
APK_BLOB_CSUM
(
*
csum
));
...
...
@@ -357,7 +386,7 @@ void apk_blob_pull_csum(apk_blob_t *b, struct apk_checksum *csum)
void
apk_blob_pull_hexdump
(
apk_blob_t
*
b
,
apk_blob_t
to
)
{
char
*
s
,
*
d
;
int
i
,
r1
,
r2
;
int
i
,
r
,
r
1
,
r2
;
if
(
unlikely
(
APK_BLOB_IS_NULL
(
*
b
)))
return
;
...
...
@@ -365,15 +394,14 @@ void apk_blob_pull_hexdump(apk_blob_t *b, apk_blob_t to)
if
(
unlikely
(
to
.
len
>
b
->
len
*
2
))
goto
err
;
r
=
0
;
for
(
i
=
0
,
s
=
b
->
ptr
,
d
=
to
.
ptr
;
i
<
to
.
len
;
i
++
)
{
r1
=
dx
(
*
(
s
++
));
if
(
unlikely
(
r1
<
0
))
goto
err
;
r2
=
dx
(
*
(
s
++
));
if
(
unlikely
(
r2
<
0
))
goto
err
;
r
|=
r1
=
dx
(
*
(
s
++
));
r
|=
r2
=
dx
(
*
(
s
++
));
*
(
d
++
)
=
(
r1
<<
4
)
+
r2
;
}
if
(
unlikely
(
r
==
0xff
))
goto
err
;
b
->
ptr
=
s
;
b
->
len
-=
to
.
len
*
2
;
return
;
...
...
@@ -382,31 +410,53 @@ err:
}
static
unsigned
char
b64decode
[]
=
{
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0x3e
,
0xff
,
0xff
,
0xff
,
0x3f
,
0x34
,
0x35
,
0x36
,
0x37
,
0x38
,
0x39
,
0x3a
,
0x3b
,
0x3c
,
0x3d
,
0xff
,
0xff
,
0xff
,
0x00
,
0xff
,
0xff
,
0xff
,
0x00
,
0x01
,
0x02
,
0x03
,
0x04
,
0x05
,
0x06
,
0x07
,
0x08
,
0x09
,
0x0a
,
0x0b
,
0x0c
,
0x0d
,
0x0e
,
0x0f
,
0x10
,
0x11
,
0x12
,
0x13
,
0x14
,
0x15
,
0x16
,
0x17
,
0x18
,
0x19
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0x1a
,
0x1b
,
0x1c
,
0x1d
,
0x1e
,
0x1f
,
0x20
,
0x21
,
0x22
,
0x23
,
0x24
,
0x25
,
0x26
,
0x27
,
0x28
,
0x29
,
0x2a
,
0x2b
,
0x2c
,
0x2d
,
0x2e
,
0x2f
,
0x30
,
0x31
,
0x32
,
0x33
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0x3e
,
0xff
,
0xff
,
0xff
,
0x3f
,
0x34
,
0x35
,
0x36
,
0x37
,
0x38
,
0x39
,
0x3a
,
0x3b
,
0x3c
,
0x3d
,
0xff
,
0xff
,
0xff
,
0x00
,
0xff
,
0xff
,
0xff
,
0x00
,
0x01
,
0x02
,
0x03
,
0x04
,
0x05
,
0x06
,
0x07
,
0x08
,
0x09
,
0x0a
,
0x0b
,
0x0c
,
0x0d
,
0x0e
,
0x0f
,
0x10
,
0x11
,
0x12
,
0x13
,
0x14
,
0x15
,
0x16
,
0x17
,
0x18
,
0x19
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0x1a
,
0x1b
,
0x1c
,
0x1d
,
0x1e
,
0x1f
,
0x20
,
0x21
,
0x22
,
0x23
,
0x24
,
0x25
,
0x26
,
0x27
,
0x28
,
0x29
,
0x2a
,
0x2b
,
0x2c
,
0x2d
,
0x2e
,
0x2f
,
0x30
,
0x31
,
0x32
,
0x33
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
0xff
,
};
static
inline
int
pull_b64_chunk
(
unsigned
char
*
to
,
const
unsigned
char
*
from
,
int
len
)
static
inline
__attribute__
((
always_inline
))
int
pull_b64_chunk
(
unsigned
char
*
to
,
const
unsigned
char
*
from
,
int
len
)
{
unsigned
char
tmp
[
4
];
int
i
;
int
i
,
r
=
0
;
for
(
i
=
0
;
i
<
4
;
i
++
)
{
if
(
unlikely
(
from
[
i
]
>=
0x80
))
return
-
1
;
for
(
i
=
0
;
i
<
len
;
i
++
)
{
tmp
[
i
]
=
b64decode
[
from
[
i
]];
if
(
unlikely
(
tmp
[
i
]
==
0xff
))
return
-
1
;
r
|=
tmp
[
i
];
}
if
(
unlikely
(
r
==
0xff
))
return
-
1
;
to
[
0
]
=
(
tmp
[
0
]
<<
2
|
tmp
[
1
]
>>
4
);
if
(
len
>
1
)
...
...
@@ -422,9 +472,10 @@ static inline int pull_b64_chunk(unsigned char *to, const unsigned char *from, i
void
apk_blob_pull_base64
(
apk_blob_t
*
b
,
apk_blob_t
to
)
{
unsigned
char
tmp
[
4
];
unsigned
char
*
src
=
(
unsigned
char
*
)
b
->
ptr
;
unsigned
char
*
dst
=
(
unsigned
char
*
)
to
.
ptr
;
int
i
,
needed
;
int
i
,
r
,
needed
;
if
(
unlikely
(
APK_BLOB_IS_NULL
(
*
b
)))
return
;
...
...
@@ -435,11 +486,29 @@ void apk_blob_pull_base64(apk_blob_t *b, apk_blob_t to)
return
;
}
for
(
i
=
0
;
i
<
to
.
len
/
3
;
i
++
,
src
+=
4
,
dst
+=
3
)
pull_b64_chunk
(
dst
,
src
,
4
);
r
=
0
;
for
(
i
=
0
;
i
<
to
.
len
/
3
;
i
++
,
src
+=
4
,
dst
+=
3
)
{
r
|=
tmp
[
0
]
=
b64decode
[
src
[
0
]];
r
|=
tmp
[
1
]
=
b64decode
[
src
[
1
]];
r
|=
tmp
[
2
]
=
b64decode
[
src
[
2
]];
r
|=
tmp
[
3
]
=
b64decode
[
src
[
3
]];
dst
[
0
]
=
(
tmp
[
0
]
<<
2
|
tmp
[
1
]
>>
4
);
dst
[
1
]
=
(
tmp
[
1
]
<<
4
|
tmp
[
2
]
>>
2
);
dst
[
2
]
=
(((
tmp
[
2
]
<<
6
)
&
0xc0
)
|
tmp
[
3
]);
}
if
(
unlikely
(
r
==
0xff
))
{
*
b
=
APK_BLOB_NULL
;
return
;
}
i
=
to
.
len
%
3
;
if
(
i
!=
0
)
pull_b64_chunk
(
dst
,
src
,
i
);
if
(
i
!=
0
)
{
if
(
pull_b64_chunk
(
dst
,
src
,
i
)
!=
0
)
{
*
b
=
APK_BLOB_NULL
;
return
;
}
}
b
->
ptr
+=
needed
;
b
->
len
-=
needed
;
}
...
...
@@ -461,7 +530,7 @@ static apk_blob_t null_blob = {0,0};
void
apk_atom_init
(
void
)
{
apk_hash_init
(
&
atom_hash
,
&
atom_ops
,
2048
);
apk_hash_init
(
&
atom_hash
,
&
atom_ops
,
10000
);
}
apk_blob_t
*
apk_blob_atomize
(
apk_blob_t
blob
)
...
...
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