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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 (inleft > 0) {
ucs4_t c = **inbuf;
DBCHAR code;
Py_ssize_t insize;
if (c < 0x80) {
REQUIRE_OUTBUF(1)
**outbuf = (unsigned char)c;
NEXT(1, 1)
continue;
}
DECODE_SURROGATE(c)
insize = GET_INSIZE(c);
REQUIRE_OUTBUF(2)
if (c < 0x10000) {
TRYMAP_ENC(big5hkscs_bmp, code, c) {
if (code == MULTIC) {
if (inleft >= 2 &&
((c & 0xffdf) == 0x00ca) &&
(((*inbuf)[1] & 0xfff7) == 0x0304)) {
code = big5hkscs_pairenc_table[
((c >> 4) |
((*inbuf)[1] >> 3)) & 3];
insize = 2;
}
else if (inleft < 2 &&
!(flags & MBENC_FLUSH))
return MBERR_TOOFEW;
else {
if (c == 0xca)
code = 0x8866;
else /* c == 0xea */
code = 0x88a7;
}
}
}
else TRYMAP_ENC(big5, code, c);
else return 1;
}
else if (c < 0x20000)
return insize;
else if (c < 0x30000) {
TRYMAP_ENC(big5hkscs_nonbmp, code, c & 0xffff);
else return insize;
}
else
return insize;
OUT1(code >> 8)
OUT2(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 = IN1;
ucs4_t decoded;
REQUIRE_OUTBUF(1)
if (c < 0x80) {
OUT1(c)
NEXT(1, 1)
continue;
}
REQUIRE_INBUF(2)
if (0xc6 > c || c > 0xc8 || (c < 0xc7 && IN2 < 0xa1)) {
TRYMAP_DEC(big5, **outbuf, c, IN2) {
NEXT(2, 1)
continue;
}
}
TRYMAP_DEC(big5hkscs, decoded, c, IN2)
{
int s = BH2S(c, IN2);
const unsigned char *hintbase;
assert(0x87 <= c && c <= 0xfe);
assert(0x40 <= IN2 && IN2 <= 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))) {
WRITEUCS4(decoded | 0x20000)
NEXT_IN(2)
}
else {
OUT1(decoded)
NEXT(2, 1)
}
continue;
}
switch ((c << 8) | IN2) {
case 0x8862: WRITE2(0x00ca, 0x0304); break;
case 0x8864: WRITE2(0x00ca, 0x030c); break;
case 0x88a3: WRITE2(0x00ea, 0x0304); break;
case 0x88a5: WRITE2(0x00ea, 0x030c); break;
default: return 1;
}
NEXT(2, 2) /* all decoded codepoints 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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