mirror of https://github.com/python/cpython
224 lines
7.0 KiB
C
224 lines
7.0 KiB
C
/*
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* _johab.c: the Johab codec
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*
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* Written by Hye-Shik Chang <perky@FreeBSD.org>
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* $CJKCodecs: _johab.c,v 1.3 2003/12/31 05:46:55 perky Exp $
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*/
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#include "codeccommon.h"
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ENCMAP(cp949)
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DECMAP(ksx1001)
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static const unsigned char u2johabidx_choseong[32] = {
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0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
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0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14,
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};
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static const unsigned char u2johabidx_jungseong[32] = {
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0x03, 0x04, 0x05, 0x06, 0x07,
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0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
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0x1a, 0x1b, 0x1c, 0x1d,
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};
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static const unsigned char u2johabidx_jongseong[32] = {
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
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0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x13, 0x14, 0x15, 0x16, 0x17,
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0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d,
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};
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static const DBCHAR u2johabjamo[] = {
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0x8841, 0x8c41, 0x8444, 0x9041, 0x8446, 0x8447, 0x9441,
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0x9841, 0x9c41, 0x844a, 0x844b, 0x844c, 0x844d, 0x844e, 0x844f,
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0x8450, 0xa041, 0xa441, 0xa841, 0x8454, 0xac41, 0xb041, 0xb441,
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0xb841, 0xbc41, 0xc041, 0xc441, 0xc841, 0xcc41, 0xd041, 0x8461,
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0x8481, 0x84a1, 0x84c1, 0x84e1, 0x8541, 0x8561, 0x8581, 0x85a1,
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0x85c1, 0x85e1, 0x8641, 0x8661, 0x8681, 0x86a1, 0x86c1, 0x86e1,
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0x8741, 0x8761, 0x8781, 0x87a1,
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};
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ENCODER(johab)
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{
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while (inleft > 0) {
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Py_UNICODE c = IN1;
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DBCHAR code;
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if (c < 0x80) {
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WRITE1((unsigned char)c)
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NEXT(1, 1)
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continue;
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}
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UCS4INVALID(c)
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RESERVE_OUTBUF(2)
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if (c >= 0xac00 && c <= 0xd7a3) {
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c -= 0xac00;
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code = 0x8000 |
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(u2johabidx_choseong[c / 588] << 10) |
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(u2johabidx_jungseong[(c / 28) % 21] << 5) |
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u2johabidx_jongseong[c % 28];
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} else if (c >= 0x3131 && c <= 0x3163)
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code = u2johabjamo[c - 0x3131];
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else TRYMAP_ENC(cp949, code, c) {
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unsigned char c1, c2, t2;
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unsigned short t1;
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assert((code & 0x8000) == 0);
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c1 = code >> 8;
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c2 = code & 0xff;
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if (((c1 >= 0x21 && c1 <= 0x2c) || (c1 >= 0x4a && c1 <= 0x7d))
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&& (c2 >= 0x21 && c2 <= 0x7e)) {
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t1 = (c1 < 0x4a ? (c1 - 0x21 + 0x1b2) : (c1 - 0x21 + 0x197));
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t2 = ((t1 & 1) ? 0x5e : 0) + (c2 - 0x21);
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OUT1(t1 >> 1)
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OUT2(t2 < 0x4e ? t2 + 0x31 : t2 + 0x43)
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NEXT(1, 2)
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continue;
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} else
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return 1;
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} else
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return 1;
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OUT1(code >> 8)
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OUT2(code & 0xff)
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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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#define FILL 0xfd
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#define NONE 0xff
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static const unsigned char johabidx_choseong[32] = {
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NONE, FILL, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05,
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0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d,
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0x0e, 0x0f, 0x10, 0x11, 0x12, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,
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};
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static const unsigned char johabidx_jungseong[32] = {
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NONE, NONE, FILL, 0x00, 0x01, 0x02, 0x03, 0x04,
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NONE, NONE, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
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NONE, NONE, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
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NONE, NONE, 0x11, 0x12, 0x13, 0x14, NONE, NONE,
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};
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static const unsigned char johabidx_jongseong[32] = {
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NONE, FILL, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
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0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
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0x0f, 0x10, NONE, 0x11, 0x12, 0x13, 0x14, 0x15,
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0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, NONE, NONE,
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};
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static const unsigned char johabjamo_choseong[32] = {
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NONE, FILL, 0x31, 0x32, 0x34, 0x37, 0x38, 0x39,
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0x41, 0x42, 0x43, 0x45, 0x46, 0x47, 0x48, 0x49,
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0x4a, 0x4b, 0x4c, 0x4d, 0x4e, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,
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};
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static const unsigned char johabjamo_jungseong[32] = {
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NONE, NONE, FILL, 0x4f, 0x50, 0x51, 0x52, 0x53,
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NONE, NONE, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
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NONE, NONE, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
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NONE, NONE, 0x60, 0x61, 0x62, 0x63, NONE, NONE,
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};
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static const unsigned char johabjamo_jongseong[32] = {
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NONE, FILL, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
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0x37, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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0x40, 0x41, NONE, 0x42, 0x44, 0x45, 0x46, 0x47,
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0x48, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, NONE, NONE,
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};
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DECODER(johab)
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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 (c < 0xd8) {
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/* johab hangul */
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unsigned char c_cho, c_jung, c_jong;
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unsigned char i_cho, i_jung, i_jong;
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c_cho = (c >> 2) & 0x1f;
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c_jung = ((c << 3) | c2 >> 5) & 0x1f;
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c_jong = c2 & 0x1f;
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i_cho = johabidx_choseong[c_cho];
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i_jung = johabidx_jungseong[c_jung];
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i_jong = johabidx_jongseong[c_jong];
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if (i_cho == NONE || i_jung == NONE || i_jong == NONE)
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return 2;
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/* we don't use U+1100 hangul jamo yet. */
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if (i_cho == FILL) {
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if (i_jung == FILL) {
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if (i_jong == FILL)
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OUT1(0x3000)
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else
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OUT1(0x3100 | johabjamo_jongseong[c_jong])
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} else {
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if (i_jong == FILL)
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OUT1(0x3100 | johabjamo_jungseong[c_jung])
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else
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return 2;
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}
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} else {
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if (i_jung == FILL) {
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if (i_jong == FILL)
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OUT1(0x3100 | johabjamo_choseong[c_cho])
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else
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return 2;
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} else
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OUT1(0xac00 +
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i_cho * 588 +
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i_jung * 28 +
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(i_jong == FILL ? 0 : i_jong))
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}
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NEXT(2, 1)
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} else {
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/* KS X 1001 except hangul jamos and syllables */
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if (c == 0xdf || c > 0xf9 ||
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c2 < 0x31 || (c2 >= 0x80 && c2 < 0x91) ||
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(c2 & 0x7f) == 0x7f ||
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(c == 0xda && (c2 >= 0xa1 && c2 <= 0xd3)))
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return 2;
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else {
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unsigned char t1, t2;
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t1 = (c < 0xe0 ? 2 * (c - 0xd9) : 2 * c - 0x197);
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t2 = (c2 < 0x91 ? c2 - 0x31 : c2 - 0x43);
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t1 = t1 + (t2 < 0x5e ? 0 : 1) + 0x21;
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t2 = (t2 < 0x5e ? t2 : t2 - 0x5e) + 0x21;
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TRYMAP_DEC(ksx1001, **outbuf, t1, t2);
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else return 2;
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NEXT(2, 1)
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}
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}
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}
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return 0;
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}
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#undef NONE
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#undef FILL
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#include "codecentry.h"
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BEGIN_CODEC_REGISTRY(johab)
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MAPOPEN(ko_KR)
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IMPORTMAP_DEC(ksx1001)
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IMPORTMAP_ENC(cp949)
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MAPCLOSE()
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END_CODEC_REGISTRY(johab)
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