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/*
* _gb18030.c: the GB18030 codec
*
* Written by Hye-Shik Chang <perky@FreeBSD.org>
* $CJKCodecs: _gb18030.c,v 1.2 2003/12/31 05:46:55 perky Exp $
*/
#include "codeccommon.h"
#include "tweak_gbk.h"
#include "map_gb18030uni.h"
ENCMAP(gbcommon)
ENCMAP(gb18030ext)
DECMAP(gb2312)
DECMAP(gbkext)
DECMAP(gb18030ext)
ENCODER(gb18030)
{
while (inleft > 0) {
ucs4_t c = IN1;
DBCHAR code;
if (c < 0x80) {
WRITE1(c)
NEXT(1, 1)
continue;
}
DECODE_SURROGATE(c)
if (c > 0x10FFFF)
#if Py_UNICODE_SIZE == 2
return 2; /* surrogates pair */
#else
return 1;
#endif
else if (c >= 0x10000) {
ucs4_t tc = c - 0x10000;
RESERVE_OUTBUF(4)
OUT4((unsigned char)(tc % 10) + 0x30)
tc /= 10;
OUT3((unsigned char)(tc % 126) + 0x81)
tc /= 126;
OUT2((unsigned char)(tc % 10) + 0x30)
tc /= 10;
OUT1((unsigned char)(tc + 0x90))
#if Py_UNICODE_SIZE == 2
NEXT(2, 4) /* surrogates pair */
#else
NEXT(1, 4)
#endif
continue;
}
RESERVE_OUTBUF(2)
GBK_PREENCODE(c, code)
else TRYMAP_ENC(gbcommon, code, c);
else TRYMAP_ENC(gb18030ext, code, c);
else {
const struct _gb18030_to_unibmp_ranges *utrrange;
RESERVE_OUTBUF(4)
for (utrrange = gb18030_to_unibmp_ranges;
utrrange->first != 0;
utrrange++)
if (utrrange->first <= c && c <= utrrange->last) {
Py_UNICODE tc;
tc = c - utrrange->first + utrrange->base;
OUT4((unsigned char)(tc % 10) + 0x30)
tc /= 10;
OUT3((unsigned char)(tc % 126) + 0x81)
tc /= 126;
OUT2((unsigned char)(tc % 10) + 0x30)
tc /= 10;
OUT1((unsigned char)tc + 0x81)
NEXT(1, 4)
break;
}
if (utrrange->first == 0) {
PyErr_SetString(PyExc_RuntimeError,
"unicode mapping invalid");
return 1;
}
continue;
}
OUT1((code >> 8) | 0x80)
if (code & 0x8000)
OUT2((code & 0xFF)) /* MSB set: GBK or GB18030ext */
else
OUT2((code & 0xFF) | 0x80) /* MSB unset: GB2312 */
NEXT(1, 2)
}
return 0;
}
DECODER(gb18030)
{
while (inleft > 0) {
unsigned char c = IN1, c2;
RESERVE_OUTBUF(1)
if (c < 0x80) {
OUT1(c)
NEXT(1, 1)
continue;
}
RESERVE_INBUF(2)
c2 = IN2;
if (c2 >= 0x30 && c2 <= 0x39) { /* 4 bytes seq */
const struct _gb18030_to_unibmp_ranges *utr;
unsigned char c3, c4;
ucs4_t lseq;
RESERVE_INBUF(4)
c3 = IN3;
c4 = IN4;
if (c < 0x81 || c3 < 0x81 || c4 < 0x30 || c4 > 0x39)
return 4;
c -= 0x81; c2 -= 0x30;
c3 -= 0x81; c4 -= 0x30;
if (c < 4) { /* U+0080 - U+FFFF */
lseq = ((ucs4_t)c * 10 + c2) * 1260 +
(ucs4_t)c3 * 10 + c4;
if (lseq < 39420) {
for (utr = gb18030_to_unibmp_ranges;
lseq >= (utr + 1)->base;
utr++) ;
OUT1(utr->first - utr->base + lseq)
NEXT(4, 1)
continue;
}
}
else if (c >= 15) { /* U+10000 - U+10FFFF */
lseq = 0x10000 + (((ucs4_t)c-15) * 10 + c2) * 1260 +
(ucs4_t)c3 * 10 + c4;
if (lseq <= 0x10FFFF) {
PUTUCS4(lseq);
NEXT_IN(4)
continue;
}
}
return 4;
}
GBK_PREDECODE(c, c2, **outbuf)
else TRYMAP_DEC(gb2312, **outbuf, c ^ 0x80, c2 ^ 0x80);
else TRYMAP_DEC(gbkext, **outbuf, c, c2);
else TRYMAP_DEC(gb18030ext, **outbuf, c, c2);
else return 2;
NEXT(2, 1)
}
return 0;
}
#include "codecentry.h"
BEGIN_CODEC_REGISTRY(gb18030)
MAPOPEN(zh_CN)
IMPORTMAP_DEC(gb2312)
IMPORTMAP_DEC(gbkext)
IMPORTMAP_ENC(gbcommon)
IMPORTMAP_ENCDEC(gb18030ext)
MAPCLOSE()
END_CODEC_REGISTRY(gb18030)
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