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/*
* _codecs_hk.c: Codecs collection for encodings from Hong Kong
*
* Written by Hye-Shik Chang <perky@FreeBSD.org>
*/
#define
USING_IMPORTED_MAPS
#include
"cjkcodecs.h"
#include
"mappings_hk.h"
/*
* BIG5HKSCS codec
*/
static
const
encode_map
*
big5_encmap
=
NULL
;
static
const
decode_map
*
big5_decmap
=
NULL
;
CODEC_INIT
(
big5hkscs
)
{
static
int
initialized
=
0
;
if
(!
initialized
&&
IMPORT_MAP
(
tw
,
big5
,
&
big5_encmap
,
&
big5_decmap
))
return
-1
;
initialized
=
1
;
return
0
;
}
/*
* There are four possible pair unicode -> big5hkscs maps as in HKSCS 2004:
* U+00CA U+0304 -> 8862 (U+00CA alone is mapped to 8866)
* U+00CA U+030C -> 8864
* U+00EA U+0304 -> 88a3 (U+00EA alone is mapped to 88a7)
* U+00EA U+030C -> 88a5
* These are handled by not mapping tables but a hand-written code.
*/
static
const
DBCHAR
big5hkscs_pairenc_table
[
4
]
=
{
0x8862
,
0x8864
,
0x88a3
,
0x88a5
};
ENCODER
(
big5hkscs
)
{
while
(
*
inpos
<
inlen
) {
Py_UCS4
c
=
INCHAR1
;
DBCHAR
code
;
Py_ssize_t
insize
;
if
(
c
<
0x80
) {
REQUIRE_OUTBUF
(
1
);
*
*
outbuf
=
(
unsigned
char
)
c
;
NEXT
(
1
,
1
);
continue
;
}
insize
=
1
;
REQUIRE_OUTBUF
(
2
);
if
(
c
<
0x10000
) {
if
(
TRYMAP_ENC
(
big5hkscs_bmp
,
code
,
c
)) {
if
(
code
==
MULTIC
) {
Py_UCS4
c2
;
if
(
inlen
-
*
inpos
>=
2
)
c2
=
INCHAR2
;
else
c2
=
0
;
if
(
inlen
-
*
inpos
>=
2
&&
((
c
&
0xffdf
)
==
0x00ca
)
&&
((
c2
&
0xfff7
)
==
0x0304
)) {
code
=
big5hkscs_pairenc_table
[
((
c
>>
4
) |
(
c2
>>
3
))
&
3
];
insize
=
2
;
}
else
if
(
inlen
-
*
inpos
<
2
&&
!(
flags
&
MBENC_FLUSH
))
return
MBERR_TOOFEW
;
else
{
if
(
c
==
0xca
)
code
=
0x8866
;
else
/* c == 0xea */
code
=
0x88a7
;
}
}
}
else
if
(
TRYMAP_ENC
(
big5
,
code
,
c
))
;
else
return
1
;
}
else
if
(
c
<
0x20000
)
return
insize
;
else
if
(
c
<
0x30000
) {
if
(
TRYMAP_ENC
(
big5hkscs_nonbmp
,
code
,
c
&
0xffff
))
;
else
return
insize
;
}
else
return
insize
;
OUTBYTE1
(
code
>>
8
);
OUTBYTE2
(
code
&
0xFF
);
NEXT
(
insize
,
2
);
}
return
0
;
}
#define
BH2S
(
c1
,
c2
) (((c1) - 0x87) * (0xfe - 0x40 + 1) + ((c2) - 0x40))
DECODER
(
big5hkscs
)
{
while
(
inleft
>
0
) {
unsigned
char
c
=
INBYTE1
;
Py_UCS4
decoded
;
if
(
c
<
0x80
) {
OUTCHAR
(
c
);
NEXT_IN
(
1
);
continue
;
}
REQUIRE_INBUF
(
2
);
if
(
0xc6
>
c
||
c
>
0xc8
||
(
c
<
0xc7
&&
INBYTE2
<
0xa1
)) {
if
(
TRYMAP_DEC
(
big5
,
decoded
,
c
,
INBYTE2
)) {
OUTCHAR
(
decoded
);
NEXT_IN
(
2
);
continue
;
}
}
if
(
TRYMAP_DEC
(
big5hkscs
,
decoded
,
c
,
INBYTE2
))
{
int
s
=
BH2S
(
c
,
INBYTE2
);
const
unsigned
char
*
hintbase
;
assert
(
0x87
<=
c
&&
c
<=
0xfe
);
assert
(
0x40
<=
INBYTE2
&&
INBYTE2
<=
0xfe
);
if
(
BH2S
(
0x87
,
0x40
) <=
s
&&
s
<=
BH2S
(
0xa0
,
0xfe
)) {
hintbase
=
big5hkscs_phint_0
;
s
-=
BH2S
(
0x87
,
0x40
);
}
else
if
(
BH2S
(
0xc6
,
0xa1
) <=
s
&&
s
<=
BH2S
(
0xc8
,
0xfe
)){
hintbase
=
big5hkscs_phint_12130
;
s
-=
BH2S
(
0xc6
,
0xa1
);
}
else
if
(
BH2S
(
0xf9
,
0xd6
) <=
s
&&
s
<=
BH2S
(
0xfe
,
0xfe
)){
hintbase
=
big5hkscs_phint_21924
;
s
-=
BH2S
(
0xf9
,
0xd6
);
}
else
return
MBERR_INTERNAL
;
if
(
hintbase
[
s
>>
3
]
&
(
1
<< (
s
&
7
))) {
OUTCHAR
(
decoded
|
0x20000
);
NEXT_IN
(
2
);
}
else
{
OUTCHAR
(
decoded
);
NEXT_IN
(
2
);
}
continue
;
}
switch
((
c
<<
8
) |
INBYTE2
) {
case
0x8862
:
OUTCHAR2
(
0x00ca
,
0x0304
);
break
;
case
0x8864
:
OUTCHAR2
(
0x00ca
,
0x030c
);
break
;
case
0x88a3
:
OUTCHAR2
(
0x00ea
,
0x0304
);
break
;
case
0x88a5
:
OUTCHAR2
(
0x00ea
,
0x030c
);
break
;
default
:
return
1
;
}
NEXT_IN
(
2
);
/* all decoded code points are pairs, above. */
}
return
0
;
}
BEGIN_MAPPINGS_LIST
MAPPING_DECONLY
(
big5hkscs
)
MAPPING_ENCONLY
(
big5hkscs_bmp
)
MAPPING_ENCONLY
(
big5hkscs_nonbmp
)
END_MAPPINGS_LIST
BEGIN_CODECS_LIST
CODEC_STATELESS_WINIT
(
big5hkscs
)
END_CODECS_LIST
I_AM_A_MODULE_FOR
(
hk
)
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