/*

* _codecs_kr.c: Codecs collection for Korean encodings

*

* Written by Hye-Shik Chang <[email protected]>

*/

#include "cjkcodecs.h"

#include "mappings_kr.h"

/*

* EUC-KR codec

*/

#define EUCKR_JAMO_FIRSTBYTE 0xA4

#define EUCKR_JAMO_FILLER 0xD4

static const unsigned char u2cgk_choseong[19] = {

0xa1, 0xa2, 0xa4, 0xa7, 0xa8, 0xa9, 0xb1, 0xb2,

0xb3, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb,

0xbc, 0xbd, 0xbe

};

static const unsigned char u2cgk_jungseong[21] = {

0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6,

0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce,

0xcf, 0xd0, 0xd1, 0xd2, 0xd3

};

static const unsigned char u2cgk_jongseong[28] = {

0xd4, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,

0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0,

0xb1, 0xb2, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xba,

0xbb, 0xbc, 0xbd, 0xbe

};

ENCODER(euc_kr)

{

while (*inpos < inlen) {

Py_UCS4 c = INCHAR1;

DBCHAR code;

if (c < 0x80) {

WRITEBYTE1((unsigned char)c);

NEXT(1, 1);

continue;

}

if (c > 0xFFFF)

return 1;

REQUIRE_OUTBUF(2);

if (TRYMAP_ENC(cp949, code, c))

;

else

return 1;

if ((code & 0x8000) == 0) {

/* KS X 1001 coded character */

OUTBYTE1((code >> 8) | 0x80);

OUTBYTE2((code & 0xFF) | 0x80);

NEXT(1, 2);

}

else {

/* Mapping is found in CP949 extension,

but we encode it in KS X 1001:1998,

make-up sequence for EUC-KR. */

REQUIRE_OUTBUF(8);

/* syllable composition precedence */

OUTBYTE1(EUCKR_JAMO_FIRSTBYTE);

OUTBYTE2(EUCKR_JAMO_FILLER);

/* All code points in CP949 extension are in unicode

* Hangul Syllable area. */

assert(0xac00 <= c && c <= 0xd7a3);

c -= 0xac00;

OUTBYTE3(EUCKR_JAMO_FIRSTBYTE);

OUTBYTE4(u2cgk_choseong[c / 588]);

NEXT_OUT(4);

OUTBYTE1(EUCKR_JAMO_FIRSTBYTE);

OUTBYTE2(u2cgk_jungseong[(c / 28) % 21]);

OUTBYTE3(EUCKR_JAMO_FIRSTBYTE);

OUTBYTE4(u2cgk_jongseong[c % 28]);

NEXT(1, 4);

}

}

return 0;

}

#define NONE 127

static const unsigned char cgk2u_choseong[] = { /* [A1, BE] */

0, 1, NONE, 2, NONE, NONE, 3, 4,

5, NONE, NONE, NONE, NONE, NONE, NONE, NONE,

6, 7, 8, NONE, 9, 10, 11, 12,

13, 14, 15, 16, 17, 18

};

static const unsigned char cgk2u_jongseong[] = { /* [A1, BE] */

1, 2, 3, 4, 5, 6, 7, NONE,

8, 9, 10, 11, 12, 13, 14, 15,

16, 17, NONE, 18, 19, 20, 21, 22,

NONE, 23, 24, 25, 26, 27

};

DECODER(euc_kr)

{

while (inleft > 0) {

unsigned char c = INBYTE1;

Py_UCS4 decoded;

if (c < 0x80) {

OUTCHAR(c);

NEXT_IN(1);

continue;

}

REQUIRE_INBUF(2);

if (c == EUCKR_JAMO_FIRSTBYTE &&

INBYTE2 == EUCKR_JAMO_FILLER) {

/* KS X 1001:1998 make-up sequence */

DBCHAR cho, jung, jong;

REQUIRE_INBUF(8);

if ((*inbuf)[2] != EUCKR_JAMO_FIRSTBYTE ||

(*inbuf)[4] != EUCKR_JAMO_FIRSTBYTE ||

(*inbuf)[6] != EUCKR_JAMO_FIRSTBYTE)

return 1;

c = (*inbuf)[3];

if (0xa1 <= c && c <= 0xbe)

cho = cgk2u_choseong[c - 0xa1];

else

cho = NONE;

c = (*inbuf)[5];

jung = (0xbf <= c && c <= 0xd3) ? c - 0xbf : NONE;

c = (*inbuf)[7];

if (c == EUCKR_JAMO_FILLER)

jong = 0;

else if (0xa1 <= c && c <= 0xbe)

jong = cgk2u_jongseong[c - 0xa1];

else

jong = NONE;

if (cho == NONE || jung == NONE || jong == NONE)

return 1;

OUTCHAR(0xac00 + cho*588 + jung*28 + jong);

NEXT_IN(8);

}

else if (TRYMAP_DEC(ksx1001, decoded, c ^ 0x80, INBYTE2 ^ 0x80)) {

OUTCHAR(decoded);

NEXT_IN(2);

}

else

return 1;

}

return 0;

}

#undef NONE

/*

* CP949 codec

*/

ENCODER(cp949)

{

while (*inpos < inlen) {

Py_UCS4 c = INCHAR1;

DBCHAR code;

if (c < 0x80) {

WRITEBYTE1((unsigned char)c);

NEXT(1, 1);

continue;

}

if (c > 0xFFFF)

return 1;

REQUIRE_OUTBUF(2);

if (TRYMAP_ENC(cp949, code, c))

;

else

return 1;

OUTBYTE1((code >> 8) | 0x80);

if (code & 0x8000)

OUTBYTE2(code & 0xFF); /* MSB set: CP949 */

else

OUTBYTE2((code & 0xFF) | 0x80); /* MSB unset: ks x 1001 */

NEXT(1, 2);

}

return 0;

}

DECODER(cp949)

{

while (inleft > 0) {

unsigned char c = INBYTE1;

Py_UCS4 decoded;

if (c < 0x80) {

OUTCHAR(c);

NEXT_IN(1);

continue;

}

REQUIRE_INBUF(2);

if (TRYMAP_DEC(ksx1001, decoded, c ^ 0x80, INBYTE2 ^ 0x80))

OUTCHAR(decoded);

else if (TRYMAP_DEC(cp949ext, decoded, c, INBYTE2))

OUTCHAR(decoded);

else

return 1;

NEXT_IN(2);

}

return 0;

}

/*

* JOHAB codec

*/

static const unsigned char u2johabidx_choseong[32] = {

0x02, 0x03, 0x04, 0x05, 0x06, 0x07,

0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,

0x10, 0x11, 0x12, 0x13, 0x14,

};

static const unsigned char u2johabidx_jungseong[32] = {

0x03, 0x04, 0x05, 0x06, 0x07,

0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,

0x12, 0x13, 0x14, 0x15, 0x16, 0x17,

0x1a, 0x1b, 0x1c, 0x1d,

};

static const unsigned char u2johabidx_jongseong[32] = {

0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,

0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,

0x10, 0x11, 0x13, 0x14, 0x15, 0x16, 0x17,

0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d,

};

static const DBCHAR u2johabjamo[] = {

0x8841, 0x8c41, 0x8444, 0x9041, 0x8446, 0x8447, 0x9441,

0x9841, 0x9c41, 0x844a, 0x844b, 0x844c, 0x844d, 0x844e, 0x844f,

0x8450, 0xa041, 0xa441, 0xa841, 0x8454, 0xac41, 0xb041, 0xb441,

0xb841, 0xbc41, 0xc041, 0xc441, 0xc841, 0xcc41, 0xd041, 0x8461,

0x8481, 0x84a1, 0x84c1, 0x84e1, 0x8541, 0x8561, 0x8581, 0x85a1,

0x85c1, 0x85e1, 0x8641, 0x8661, 0x8681, 0x86a1, 0x86c1, 0x86e1,

0x8741, 0x8761, 0x8781, 0x87a1,

};

ENCODER(johab)

{

while (*inpos < inlen) {

Py_UCS4 c = INCHAR1;

DBCHAR code;

if (c < 0x80) {

WRITEBYTE1((unsigned char)c);

NEXT(1, 1);

continue;

}

if (c > 0xFFFF)

return 1;

REQUIRE_OUTBUF(2);

if (c >= 0xac00 && c <= 0xd7a3) {

c -= 0xac00;

code = 0x8000 |

(u2johabidx_choseong[c / 588] << 10) |

(u2johabidx_jungseong[(c / 28) % 21] << 5) |

u2johabidx_jongseong[c % 28];

}

else if (c >= 0x3131 && c <= 0x3163)

code = u2johabjamo[c - 0x3131];

else if (TRYMAP_ENC(cp949, code, c)) {

unsigned char c1, c2, t2;

unsigned short t1;

assert((code & 0x8000) == 0);

c1 = code >> 8;

c2 = code & 0xff;

if (((c1 >= 0x21 && c1 <= 0x2c) ||

(c1 >= 0x4a && c1 <= 0x7d)) &&

(c2 >= 0x21 && c2 <= 0x7e)) {

t1 = (c1 < 0x4a ? (c1 - 0x21 + 0x1b2) :

(c1 - 0x21 + 0x197));

t2 = ((t1 & 1) ? 0x5e : 0) + (c2 - 0x21);

OUTBYTE1(t1 >> 1);

OUTBYTE2(t2 < 0x4e ? t2 + 0x31 : t2 + 0x43);

NEXT(1, 2);

continue;

}

else

return 1;

}

else

return 1;

OUTBYTE1(code >> 8);

OUTBYTE2(code & 0xff);

NEXT(1, 2);

}

return 0;

}

#define FILL 0xfd

#define NONE 0xff

static const unsigned char johabidx_choseong[32] = {

NONE, FILL, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05,

0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d,

0x0e, 0x0f, 0x10, 0x11, 0x12, NONE, NONE, NONE,

NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,

};

static const unsigned char johabidx_jungseong[32] = {

NONE, NONE, FILL, 0x00, 0x01, 0x02, 0x03, 0x04,

NONE, NONE, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,

NONE, NONE, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,

NONE, NONE, 0x11, 0x12, 0x13, 0x14, NONE, NONE,

};

static const unsigned char johabidx_jongseong[32] = {

NONE, FILL, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,

0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,

0x0f, 0x10, NONE, 0x11, 0x12, 0x13, 0x14, 0x15,

0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, NONE, NONE,

};

static const unsigned char johabjamo_choseong[32] = {

NONE, FILL, 0x31, 0x32, 0x34, 0x37, 0x38, 0x39,

0x41, 0x42, 0x43, 0x45, 0x46, 0x47, 0x48, 0x49,

0x4a, 0x4b, 0x4c, 0x4d, 0x4e, NONE, NONE, NONE,

NONE, NONE, NONE, NONE, NONE, NONE, NONE, NONE,

};

static const unsigned char johabjamo_jungseong[32] = {

NONE, NONE, FILL, 0x4f, 0x50, 0x51, 0x52, 0x53,

NONE, NONE, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,

NONE, NONE, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,

NONE, NONE, 0x60, 0x61, 0x62, 0x63, NONE, NONE,

};

static const unsigned char johabjamo_jongseong[32] = {

NONE, FILL, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,

0x37, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,

0x40, 0x41, NONE, 0x42, 0x44, 0x45, 0x46, 0x47,

0x48, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, NONE, NONE,

};

DECODER(johab)

{

while (inleft > 0) {

unsigned char c = INBYTE1, c2;

Py_UCS4 decoded;

if (c < 0x80) {

OUTCHAR(c);

NEXT_IN(1);

continue;

}

REQUIRE_INBUF(2);

c2 = INBYTE2;

if (c < 0xd8) {

/* johab hangul */

unsigned char c_cho, c_jung, c_jong;

unsigned char i_cho, i_jung, i_jong;

c_cho = (c >> 2) & 0x1f;

c_jung = ((c << 3) | c2 >> 5) & 0x1f;

c_jong = c2 & 0x1f;

i_cho = johabidx_choseong[c_cho];

i_jung = johabidx_jungseong[c_jung];

i_jong = johabidx_jongseong[c_jong];

if (i_cho == NONE || i_jung == NONE || i_jong == NONE)

return 1;

/* we don't use U+1100 hangul jamo yet. */

if (i_cho == FILL) {

if (i_jung == FILL) {

if (i_jong == FILL)

OUTCHAR(0x3000);

else

OUTCHAR(0x3100 |

johabjamo_jongseong[c_jong]);

}

else {

if (i_jong == FILL)

OUTCHAR(0x3100 |

johabjamo_jungseong[c_jung]);

else

return 1;

}

} else {

if (i_jung == FILL) {

if (i_jong == FILL)

OUTCHAR(0x3100 |

johabjamo_choseong[c_cho]);

else

return 1;

}

else

OUTCHAR(0xac00 +

i_cho * 588 +

i_jung * 28 +

(i_jong == FILL ? 0 : i_jong));

}

NEXT_IN(2);

} else {

/* KS X 1001 except hangul jamos and syllables */

if (c == 0xdf || c > 0xf9 ||

c2 < 0x31 || (c2 >= 0x80 && c2 < 0x91) ||

(c2 & 0x7f) == 0x7f ||

(c == 0xda && (c2 >= 0xa1 && c2 <= 0xd3)))

return 1;

else {

unsigned char t1, t2;

t1 = (c < 0xe0 ? 2 * (c - 0xd9) :

2 * c - 0x197);

t2 = (c2 < 0x91 ? c2 - 0x31 : c2 - 0x43);

t1 = t1 + (t2 < 0x5e ? 0 : 1) + 0x21;

t2 = (t2 < 0x5e ? t2 : t2 - 0x5e) + 0x21;

if (TRYMAP_DEC(ksx1001, decoded, t1, t2)) {

OUTCHAR(decoded);

NEXT_IN(2);

}

else {

return 1;

}

}

}

}

return 0;

}

#undef NONE

#undef FILL

BEGIN_MAPPINGS_LIST(3)

MAPPING_DECONLY(ksx1001)

MAPPING_ENCONLY(cp949)

MAPPING_DECONLY(cp949ext)

END_MAPPINGS_LIST

BEGIN_CODECS_LIST(3)

CODEC_STATELESS(euc_kr)

CODEC_STATELESS(cp949)

CODEC_STATELESS(johab)

END_CODECS_LIST

I_AM_A_MODULE_FOR(kr)