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/*
* _codecs_hk.c: Codecs collection for encodings from Hong Kong
*
* Written by Hye-Shik Chang <perky@FreeBSD.org>
* $CJKCodecs: _codecs_hk.c,v 1.4 2004/07/18 04:44:27 perky Exp $
*/
#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;
}
ENCODER(big5hkscs)
{
while (inleft > 0) {
ucs4_t c = **inbuf;
DBCHAR code;
int 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);
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) - 0x88) * (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))
goto hkscsdec;
TRYMAP_DEC(big5, **outbuf, c, IN2) {
NEXT(2, 1)
}
else
hkscsdec: TRYMAP_DEC(big5hkscs, decoded, c, IN2) {
int s = BH2S(c, IN2);
const unsigned char *hintbase;
assert(0x88 <= c && c <= 0xfe);
assert(0x40 <= IN2 && IN2 <= 0xfe);
if (BH2S(0x88, 0x40) <= s && s <= BH2S(0xa0, 0xfe)) {
hintbase = big5hkscs_phint_0;
s -= BH2S(0x88, 0x40);
}
else if (BH2S(0xc6,0xa1) <= s && s <= BH2S(0xc8,0xfe)){
hintbase = big5hkscs_phint_11939;
s -= BH2S(0xc6, 0xa1);
}
else if (BH2S(0xf9,0xd6) <= s && s <= BH2S(0xfe,0xfe)){
hintbase = big5hkscs_phint_21733;
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)
}
}
else return 2;
}
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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