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/*
* _shift_jisx0213.c: the SHIFT-JISX0213 codec
*
* Written by Hye-Shik Chang <perky@FreeBSD.org>
* $CJKCodecs: _shift_jisx0213.c,v 1.2 2003/12/31 05:46:55 perky Exp $
*/
#define USING_BINARY_PAIR_SEARCH
#include "codeccommon.h"
#include "alg_jisx0201.h"
#include "map_jisx0213_pairs.h"
ENCMAP(jisxcommon)
DECMAP(jisx0208)
ENCMAP(jisx0213_bmp)
DECMAP(jisx0213_1_bmp)
DECMAP(jisx0213_2_bmp)
ENCMAP(jisx0213_emp)
DECMAP(jisx0213_1_emp)
DECMAP(jisx0213_2_emp)
#define EMPBASE 0x20000
ENCODER(shift_jisx0213)
{
while (inleft > 0) {
ucs4_t c = IN1;
DBCHAR code = NOCHAR;
int c1, c2;
size_t insize;
JISX0201_ENCODE(c, code)
else DECODE_SURROGATE(c)
if (code < 0x80 || (code >= 0xa1 && code <= 0xdf)) {
WRITE1(code)
NEXT(1, 1)
continue;
}
RESERVE_OUTBUF(2)
insize = GET_INSIZE(c);
if (code == NOCHAR) {
if (c <= 0xffff) {
TRYMAP_ENC(jisx0213_bmp, code, c) {
if (code == MULTIC) {
if (inleft < 2) {
if (flags & MBENC_FLUSH) {
code = find_pairencmap(c, 0, jisx0213_pairencmap,
JISX0213_ENCPAIRS);
if (code == DBCINV)
return 1;
} else
return MBERR_TOOFEW;
} else {
code = find_pairencmap(c, IN2,
jisx0213_pairencmap, JISX0213_ENCPAIRS);
if (code == DBCINV) {
code = find_pairencmap(c, 0, jisx0213_pairencmap,
JISX0213_ENCPAIRS);
if (code == DBCINV)
return 1;
} else
insize = 2;
}
}
} else TRYMAP_ENC(jisxcommon, code, c) {
if (code & 0x8000)
return 1; /* abandon JIS X 0212 codes */
} else return 1;
} else if (c >> 16 == EMPBASE >> 16) {
TRYMAP_ENC(jisx0213_emp, code, c & 0xffff);
else return insize;
} else
return insize;
}
c1 = code >> 8;
c2 = (code & 0xff) - 0x21;
if (c1 & 0x80) { /* Plane 2 */
if (c1 >= 0xee) c1 -= 0x87;
else if (c1 >= 0xac || c1 == 0xa8) c1 -= 0x49;
else c1 -= 0x43;
} else /* Plane 1 */
c1 -= 0x21;
if (c1 & 1) c2 += 0x5e;
c1 >>= 1;
OUT1(c1 + (c1 < 0x1f ? 0x81 : 0xc1))
OUT2(c2 + (c2 < 0x3f ? 0x40 : 0x41))
NEXT(insize, 2)
}
return 0;
}
DECODER(shift_jisx0213)
{
while (inleft > 0) {
unsigned char c = IN1;
RESERVE_OUTBUF(1)
JISX0201_DECODE(c, **outbuf)
else if ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xfc)) {
unsigned char c1, c2 = IN2;
ucs4_t code;
RESERVE_INBUF(2)
if (c2 < 0x40 || (c2 > 0x7e && c2 < 0x80) || c2 > 0xfc)
return 2;
c1 = (c < 0xe0 ? c - 0x81 : c - 0xc1);
c2 = (c2 < 0x80 ? c2 - 0x40 : c2 - 0x41);
c1 = (2 * c1 + (c2 < 0x5e ? 0 : 1));
c2 = (c2 < 0x5e ? c2 : c2 - 0x5e) + 0x21;
if (c1 < 0x5e) { /* Plane 1 */
c1 += 0x21;
TRYMAP_DEC(jisx0208, **outbuf, c1, c2) {
NEXT_OUT(1)
} else TRYMAP_DEC(jisx0213_1_bmp, **outbuf, c1, c2) {
NEXT_OUT(1)
} else TRYMAP_DEC(jisx0213_1_emp, code, c1, c2) {
PUTUCS4(EMPBASE | code)
} else TRYMAP_DEC(jisx0213_pair, code, c1, c2) {
WRITE2(code >> 16, code & 0xffff)
NEXT_OUT(2)
} else
return 2;
NEXT_IN(2)
} else { /* Plane 2 */
if (c1 >= 0x67) c1 += 0x07;
else if (c1 >= 0x63 || c1 == 0x5f) c1 -= 0x37;
else c1 -= 0x3d;
TRYMAP_DEC(jisx0213_2_bmp, **outbuf, c1, c2) {
NEXT_OUT(1)
} else TRYMAP_DEC(jisx0213_2_emp, code, c1, c2) {
PUTUCS4(EMPBASE | code)
} else
return 2;
NEXT_IN(2)
}
continue;
} else
return 2;
NEXT(1, 1) /* JIS X 0201 */
}
return 0;
}
#include "codecentry.h"
BEGIN_CODEC_REGISTRY(shift_jisx0213)
MAPOPEN(ja_JP)
IMPORTMAP_DEC(jisx0208)
IMPORTMAP_ENC(jisxcommon)
IMPORTMAP_ENC(jisx0213_bmp)
IMPORTMAP_DEC(jisx0213_1_bmp)
IMPORTMAP_DEC(jisx0213_2_bmp)
IMPORTMAP_ENC(jisx0213_emp)
IMPORTMAP_DEC(jisx0213_1_emp)
IMPORTMAP_DEC(jisx0213_2_emp)
MAPCLOSE()
END_CODEC_REGISTRY(shift_jisx0213)
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