mirror of https://github.com/python/cpython
145 lines
2.5 KiB
C
145 lines
2.5 KiB
C
/*
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* _codecs_hk.c: Codecs collection for encodings from Hong Kong
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*
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* Written by Hye-Shik Chang <perky@FreeBSD.org>
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* $CJKCodecs: _codecs_hk.c,v 1.4 2004/07/18 04:44:27 perky Exp $
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*/
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#define USING_IMPORTED_MAPS
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#include "cjkcodecs.h"
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#include "mappings_hk.h"
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/*
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* BIG5HKSCS codec
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*/
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static const encode_map *big5_encmap = NULL;
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static const decode_map *big5_decmap = NULL;
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CODEC_INIT(big5hkscs)
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{
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static int initialized = 0;
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if (!initialized && IMPORT_MAP(tw, big5, &big5_encmap, &big5_decmap))
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return -1;
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initialized = 1;
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return 0;
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}
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ENCODER(big5hkscs)
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{
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while (inleft > 0) {
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ucs4_t c = **inbuf;
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DBCHAR code;
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int insize;
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if (c < 0x80) {
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REQUIRE_OUTBUF(1)
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**outbuf = (unsigned char)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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insize = GET_INSIZE(c);
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REQUIRE_OUTBUF(2)
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if (c < 0x10000) {
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TRYMAP_ENC(big5hkscs_bmp, code, c);
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else TRYMAP_ENC(big5, code, c);
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else return 1;
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}
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else if (c < 0x20000)
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return insize;
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else if (c < 0x30000) {
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TRYMAP_ENC(big5hkscs_nonbmp, code, c & 0xffff);
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else return insize;
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}
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else
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return insize;
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OUT1(code >> 8)
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OUT2(code & 0xFF)
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NEXT(insize, 2)
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}
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return 0;
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}
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#define BH2S(c1, c2) (((c1) - 0x88) * (0xfe - 0x40 + 1) + ((c2) - 0x40))
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DECODER(big5hkscs)
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{
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while (inleft > 0) {
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unsigned char c = IN1;
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ucs4_t decoded;
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REQUIRE_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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REQUIRE_INBUF(2)
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if (0xc6 <= c && c <= 0xc8 && (c >= 0xc7 || IN2 >= 0xa1))
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goto hkscsdec;
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TRYMAP_DEC(big5, **outbuf, c, IN2) {
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NEXT(2, 1)
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}
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else
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hkscsdec: TRYMAP_DEC(big5hkscs, decoded, c, IN2) {
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int s = BH2S(c, IN2);
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const unsigned char *hintbase;
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assert(0x88 <= c && c <= 0xfe);
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assert(0x40 <= IN2 && IN2 <= 0xfe);
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if (BH2S(0x88, 0x40) <= s && s <= BH2S(0xa0, 0xfe)) {
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hintbase = big5hkscs_phint_0;
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s -= BH2S(0x88, 0x40);
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}
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else if (BH2S(0xc6,0xa1) <= s && s <= BH2S(0xc8,0xfe)){
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hintbase = big5hkscs_phint_11939;
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s -= BH2S(0xc6, 0xa1);
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}
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else if (BH2S(0xf9,0xd6) <= s && s <= BH2S(0xfe,0xfe)){
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hintbase = big5hkscs_phint_21733;
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s -= BH2S(0xf9, 0xd6);
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}
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else
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return MBERR_INTERNAL;
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if (hintbase[s >> 3] & (1 << (s & 7))) {
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WRITEUCS4(decoded | 0x20000)
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NEXT_IN(2)
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}
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else {
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OUT1(decoded)
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NEXT(2, 1)
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}
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}
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else return 2;
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}
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return 0;
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}
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BEGIN_MAPPINGS_LIST
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MAPPING_DECONLY(big5hkscs)
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MAPPING_ENCONLY(big5hkscs_bmp)
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MAPPING_ENCONLY(big5hkscs_nonbmp)
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END_MAPPINGS_LIST
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BEGIN_CODECS_LIST
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CODEC_STATELESS_WINIT(big5hkscs)
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END_CODECS_LIST
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I_AM_A_MODULE_FOR(hk)
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