diff options
Diffstat (limited to 'Modules/cjkcodecs/_johab.c')
| -rw-r--r-- | Modules/cjkcodecs/_johab.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/Modules/cjkcodecs/_johab.c b/Modules/cjkcodecs/_johab.c new file mode 100644 index 0000000..3aeb500 --- /dev/null +++ b/Modules/cjkcodecs/_johab.c @@ -0,0 +1,223 @@ +/* + * _johab.c: the Johab codec + * + * Written by Hye-Shik Chang <perky@FreeBSD.org> + * $CJKCodecs: _johab.c,v 1.3 2003/12/31 05:46:55 perky Exp $ + */ + +#include "codeccommon.h" + +ENCMAP(cp949) +DECMAP(ksx1001) + +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 (inleft > 0) { + Py_UNICODE c = IN1; + DBCHAR code; + + if (c < 0x80) { + WRITE1(c) + NEXT(1, 1) + continue; + } + UCS4INVALID(c) + + RESERVE_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 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); + OUT1(t1 >> 1) + OUT2(t2 < 0x4e ? t2 + 0x31 : t2 + 0x43) + NEXT(1, 2) + continue; + } else + return 1; + } else + return 1; + + OUT1(code >> 8) + OUT2(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 = IN1, c2; + + RESERVE_OUTBUF(1) + + if (c < 0x80) { + OUT1(c) + NEXT(1, 1) + continue; + } + + RESERVE_INBUF(2) + c2 = IN2; + + 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 2; + + /* we don't use U+1100 hangul jamo yet. */ + if (i_cho == FILL) { + if (i_jung == FILL) { + if (i_jong == FILL) + OUT1(0x3000) + else + OUT1(0x3100 | johabjamo_jongseong[c_jong]) + } else { + if (i_jong == FILL) + OUT1(0x3100 | johabjamo_jungseong[c_jung]) + else + return 2; + } + } else { + if (i_jung == FILL) { + if (i_jong == FILL) + OUT1(0x3100 | johabjamo_choseong[c_cho]) + else + return 2; + } else + OUT1(0xac00 + + i_cho * 588 + + i_jung * 28 + + (i_jong == FILL ? 0 : i_jong)) + } + NEXT(2, 1) + } 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 2; + 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; + + TRYMAP_DEC(ksx1001, **outbuf, t1, t2); + else return 2; + NEXT(2, 1) + } + } + } + + return 0; +} +#undef NONE +#undef FILL + +#include "codecentry.h" +BEGIN_CODEC_REGISTRY(johab) + MAPOPEN(ko_KR) + IMPORTMAP_DEC(ksx1001) + IMPORTMAP_ENC(cp949) + MAPCLOSE() +END_CODEC_REGISTRY(johab) |