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