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glibc/iconvdata/johab.c

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/* Mapping tables for JOHAB handling.
Copyright (C) 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jungshik Shin <jshin@pantheon.yale.edu>
and Ulrich Drepper <drepper@cygnus.com>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdint.h>
#include <ksc5601.h>
/* The table for Bit pattern to Hangul Jamo
5 bits each are used to encode
leading consonants(19 + 1 filler), medial vowels(21 + 1 filler)
and trailing consonants(27 + 1 filler).
KS C 5601-1992 Annex 3 Table 2
0 : Filler, -1: invalid, >= 1 : valid
*/
static const int init[32] =
{
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
19, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
static const int mid[32] =
{
-1, -1, 0, 1, 2, 3, 4, 5,
-1, -1, 6, 7, 8, 9, 10, 11,
-1, -1, 12, 13, 14, 15, 16, 17,
-1, -1, 18, 19, 20, 21, -1, -1
};
static const int final[32] =
{
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
-1, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, -1, -1
};
/*
Hangul Jamo in Johab to Unicode 2.0 : Unicode 2.0
defines 51 Hangul Compatibility Jamos in the block [0x3131,0x314e]
It's to be considered later which Jamo block to use, Compatibility
block [0x3131,0x314e] or Hangul Conjoining Jamo block, [0x1100,0x11ff]
*/
static const uint32_t init_to_ucs[19] =
{
0x3131, 0x3132, 0x3134, 0x3137, 0x3138, 0x3139, 0x3141, 0x3142,
0x3143, 0x3145, 0x3146, 0x3147, 0x3148, 0x3149, 0x314a, 0x314b,
0x314c, 0x314d, 0x314e
};
static const uint32_t final_to_ucs[27] =
{
L'\0', L'\0', 0x3133, L'\0', 0x3135, 0x3136, L'\0', L'\0',
0x313a, 0x313b, 0x314c, 0x313d, 0x313e, 0x313f,
0x3140, L'\0', L'\0', 0x3144, L'\0', L'\0', L'\0',
L'\0', L'\0', L'\0', L'\0', L'\0', L'\0'
};
/* The following three arrays are used to convert
precomposed Hangul syllables in [0xac00,0xd???]
to Jamo bit patterns for Johab encoding
cf. : KS C 5601-1992, Annex3 Table 2
Arrays are used to speed up things although it's possible
to get the same result arithmetically.
*/
static const int init_to_bit[19] =
{
0x8800, 0x8c00, 0x9000, 0x9400, 0x9800, 0x9c00,
0xa000, 0xa400, 0xa800, 0xac00, 0xb000, 0xb400,
0xb800, 0xbc00, 0xc000, 0xc400, 0xc800, 0xcc00,
0xd000
};
static const int mid_to_bit[21] =
{
0x0060, 0x0080, 0x00a0, 0x00c0, 0x00e0,
0x0140, 0x0160, 0x0180, 0x01a0, 0x01c0, 0x1e0,
0x0240, 0x0260, 0x0280, 0x02a0, 0x02c0, 0x02e0,
0x0340, 0x0360, 0x0380, 0x03a0
};
static const int final_to_bit[28] =
{
1, 2, 3, 4, 5, 6, 7, 8, 9, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d
};
/* The conversion table from
UCS4 Hangul Compatibility Jamo in [0x3131,0x3163]
to Johab
cf. 1. KS C 5601-1992 Annex 3 Table 2
2. Unicode 2.0 manual
*/
static const uint16_t jamo_from_ucs_table[51] =
{
0x8841, 0x8c41,
0x8444,
0x9041,
0x8446, 0x8447,
0x9441, 0x9841, 0x9c41,
0x844a, 0x844b, 0x844c, 0x844d, 0x884e, 0x884f, 0x8450,
0xa041, 0xa441, 0xa841,
0x8454,
0xac41, 0xb041, 0xb441, 0xb841, 0xbc41,
0xc041, 0xc441, 0xc841, 0xca41, 0xd041,
0x8461, 0x8481, 0x84a1, 0x84c1, 0x84e1,
0x8541, 0x8561, 0x8581, 0x85a1, 0x85c1, 0x85e1,
0x8641, 0x8661, 0x8681, 0x86a1, 0x86c1, 0x86e1,
0x8741, 0x8761, 0x8781, 0x87a1
};
static inline uint32_t
johab_sym_hanja_to_ucs (uint_fast32_t idx, uint_fast32_t c1, uint_fast32_t c2)
{
if (idx <= 0xdefe)
return (uint32_t) __ksc5601_sym_to_ucs[(c1 - 0xd9) * 188 + c2
- (c2 > 0x90 ? 0x43 : 0x31)];
else
return (uint32_t) __ksc5601_hanja_to_ucs[(c1 - 0xe0) * 188 + c2
- (c2 > 0x90 ? 0x43 : 0x31)];
}
/* Definitions used in the body of the `gconv' function. */
#define CHARSET_NAME "JOHAB//"
#define FROM_LOOP from_johab
#define TO_LOOP to_johab
#define DEFINE_INIT 1
#define DEFINE_FINI 1
#define MIN_NEEDED_FROM 1
#define MAX_NEEDED_FROM 2
#define MIN_NEEDED_TO 4
/* First define the conversion function from JOHAB to UCS4. */
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
uint32_t ch = *inptr; \
\
/* half-width Korean Currency WON sign \
if (ch == 0x5c) \
ch = 0x20a9; \
else if (ch < 0x7f) \
ch = (uint32_t) ch; \
*/ \
if (ch < 0x7f) \
/* Plain ASCII. */ \
++inptr; \
/* Johab : 1. Hangul \
1st byte : 0x84-0xd3 \
2nd byte : 0x41-0x7e, 0x81-0xfe \
2. Hanja & Symbol : \
1st byte : 0xd8-0xde, 0xe0-0xf9 \
2nd byte : 0x31-0x7e, 0x91-0xfe \
0xd831-0xd87e and 0xd891-0xd8fe are user-defined area */ \
else \
{ \
if (ch > 0xf9 || ch == 0xdf || (ch > 0x7e && ch < 0x84) \
|| (ch > 0xd3 && ch < 0xd9)) \
{ \
/* These are illegal. */ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
else \
{ \
/* Two-byte character. First test whether the next \
character is also available. */ \
uint32_t ch2; \
uint_fast32_t idx; \
\
if (NEED_LENGTH_TEST && inptr + 1 >= inend) \
{ \
/* The second character is not available. Store the \
intermediate result. */ \
result = GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
ch2 = inptr[1]; \
idx = ch * 256 + ch2; \
if (ch <= 0xd3) \
{ \
/* Hangul */ \
uint_fast32_t i, m, f; \
\
i = init[(idx & 0x7c00) >> 10]; \
m = mid[(idx & 0x03e0) >> 5]; \
f = final[idx & 0x001f]; \
\
if (i == -1 || m == -1 || f == -1) \
{ \
/* This is illegal. */ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
else if (i > 0 && m > 0) \
ch = ((i - 1) * 21 + (m - 1)) * 28 + f + 0xac00; \
else if (i > 0 && m == 0 && f == 0) \
ch = init_to_ucs[i - 1]; \
else if (i == 0 && m > 0 && f == 0) \
ch = 0x314e + m; /* 0x314f + m - 1 */ \
else if (i == 0 && m == 0 && f > 0) \
ch = final_to_ucs[f - 1]; /* round trip?? */ \
else \
{ \
/* This is illegal. */ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
} \
else \
{ \
if (ch2 < 0x31 || (ch2 > 0x7e && ch2 < 0x91) || ch2 == 0xff) \
{ \
/* This is illegal. */ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
else if (ch == 0xda && ch2 > 0xa0 && ch2 < 0xd4) \
{ \
/* This is illegal. Modern Hangul Jaso is defined \
elsewhere in Johab */ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
else \
{ \
ch = johab_sym_hanja_to_ucs (idx, ch, ch2); \
/* if (idx <= 0xdefe) \
ch = __ksc5601_sym_to_ucs[(ch - 0xd9) * 192 \
+ ch2 - (ch2 > 0x90 \
? 0x43 : 0x31)]; \
else \
ch = __ksc5601_hanja_to_ucs[(ch - 0xe0) *192 \
+ ch2 - (ch2 > 0x90 \
?0x43 : 0x31)];\
*/ \
} \
} \
} \
\
if (ch == 0) \
{ \
/* This is an illegal character. */ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
\
inptr += 2; \
} \
\
*((uint32_t *) outptr)++ = ch; \
}
#include <iconv/loop.c>
/* Next, define the other direction. */
#define MIN_NEEDED_INPUT MIN_NEEDED_TO
#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
#define LOOPFCT TO_LOOP
#define BODY \
{ \
uint32_t ch = *((uint32_t *) inptr); \
/* \
if (ch >= (sizeof (from_ucs4_lat1) / sizeof (from_ucs4_lat1[0]))) \
{ \
if (ch >= 0x0391 && ch <= 0x0451) \
cp = from_ucs4_greek[ch - 0x391]; \
else if (ch >= 0x2010 && ch <= 0x9fa0) \
cp = from_ucs4_cjk[ch - 0x02010]; \
else \
break; \
} \
else \
cp = from_ucs4_lat1[ch]; \
*/ \
\
if (ch < 0x7f) \
*outptr++ = ch; \
else \
{ \
if (ch >= 0xac00 && ch <= 0xd7a3) \
{ \
ch -= 0xac00; \
\
ch = (init_to_bit[ch / 588] /* 21 * 28 = 588 */ \
+ mid_to_bit[(ch / 28) % 21]/* (ch % (21 * 28)) / 28 */ \
+ final_to_bit[ch % 28]); /* (ch % (21 * 28)) % 28 */ \
\
if (NEED_LENGTH_TEST && outptr + 2 > outend) \
{ \
result = GCONV_FULL_OUTPUT; \
break; \
} \
\
*outptr++ = ch / 256; \
*outptr++ = ch % 256; \
} \
/* KS C 5601-1992 Annex 3 regards 0xA4DA(Hangul Filler : U3164) \
as symbol */ \
else if (ch >= 0x3131 && ch <= 0x3163) \
{ \
ch = jamo_from_ucs_table[ch - 0x3131]; \
\
if (NEED_LENGTH_TEST && outptr + 2 > outend) \
{ \
result = GCONV_FULL_OUTPUT; \
break; \
} \
\
*outptr++ = ch / 256; \
*outptr++ = ch % 256; \
} \
if ((ch >= 0x4e00 && ch <= 0x9fa5) || (ch >= 0xf900 && ch <= 0xfa0b)) \
{ \
size_t written; \
\
written = ucs4_to_ksc5601_hanja (ch, outptr, \
(NEED_LENGTH_TEST \
? outend - outptr : 2)); \
if (NEED_LENGTH_TEST && written == 0) \
{ \
result = GCONV_FULL_OUTPUT; \
break; \
} \
if (written == UNKNOWN_10646_CHAR) \
{ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
\
outptr[0] -= 0x4a; \
outptr[1] += 0x80; \
\
outptr[1] += (outptr[0] % 2 \
? 0 : (outptr[1] > 0xee ? 0x43 : 0x31)); \
outptr[1] -= 0xa1; \
outptr[0] /= 2; \
outptr[0] += 0xe0; \
\
outptr += 2; \
} \
else \
{ \
size_t written; \
\
written = ucs4_to_ksc5601_sym (ch, outptr, \
(NEED_LENGTH_TEST \
? outend - outptr : 2)); \
if (NEED_LENGTH_TEST && written == 0) \
{ \
result = GCONV_FULL_OUTPUT; \
break; \
} \
if (written == UNKNOWN_10646_CHAR) \
{ \
result = GCONV_ILLEGAL_INPUT; \
break; \
} \
\
outptr[0] -= 0x4a; \
outptr[1] += 0x80; \
\
outptr[1] += (outptr[0] % 2 \
? 0 : (outptr[1] > 0xee ? 0x43 : 0x31)); \
outptr[1] -= 0xa1; \
outptr[0] /= 2; \
outptr[0] += 0xe0; \
\
outptr += 2; \
} \
} \
\
inptr += 4; \
}
#include <iconv/loop.c>
/* Now define the toplevel functions. */
#include <iconv/skeleton.c>