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409 lines
13 KiB
C
409 lines
13 KiB
C
/* Mapping tables for JOHAB handling.
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Copyright (C) 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jungshik Shin <jshin@pantheon.yale.edu>
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and Ulrich Drepper <drepper@cygnus.com>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stdint.h>
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#include <ksc5601.h>
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/* The table for Bit pattern to Hangul Jamo
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5 bits each are used to encode
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leading consonants(19 + 1 filler), medial vowels(21 + 1 filler)
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and trailing consonants(27 + 1 filler).
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KS C 5601-1992 Annex 3 Table 2
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0 : Filler, -1: invalid, >= 1 : valid
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*/
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static const int init[32] =
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{
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-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
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19, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
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};
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static const int mid[32] =
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{
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-1, -1, 0, 1, 2, 3, 4, 5,
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-1, -1, 6, 7, 8, 9, 10, 11,
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-1, -1, 12, 13, 14, 15, 16, 17,
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-1, -1, 18, 19, 20, 21, -1, -1
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};
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static const int final[32] =
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{
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-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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-1, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, -1, -1
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};
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/*
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Hangul Jamo in Johab to Unicode 2.0 : Unicode 2.0
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defines 51 Hangul Compatibility Jamos in the block [0x3131,0x314e]
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It's to be considered later which Jamo block to use, Compatibility
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block [0x3131,0x314e] or Hangul Conjoining Jamo block, [0x1100,0x11ff]
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*/
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static const uint32_t init_to_ucs[19] =
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{
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0x3131, 0x3132, 0x3134, 0x3137, 0x3138, 0x3139, 0x3141, 0x3142,
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0x3143, 0x3145, 0x3146, 0x3147, 0x3148, 0x3149, 0x314a, 0x314b,
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0x314c, 0x314d, 0x314e
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};
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static const uint32_t final_to_ucs[31] =
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{
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L'\0', L'\0', 0x3133, L'\0', 0x3135, 0x3136, L'\0', L'\0',
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0x313a, 0x313b, 0x314c, 0x313d, 0x313e, 0x313f,
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0x3140, L'\0', L'\0', L'\0', 0x3144, L'\0', L'\0', L'\0',
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L'\0', L'\0', L'\0', L'\0', L'\0', L'\0', L'\0', L'\0', L'\0'
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};
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/* The following three arrays are used to convert
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precomposed Hangul syllables in [0xac00,0xd???]
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to Jamo bit patterns for Johab encoding
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cf. : KS C 5601-1992, Annex3 Table 2
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Arrays are used to speed up things although it's possible
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to get the same result arithmetically.
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*/
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static const int init_to_bit[19] =
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{
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0x8800, 0x8c00, 0x9000, 0x9400, 0x9800, 0x9c00,
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0xa000, 0xa400, 0xa800, 0xac00, 0xb000, 0xb400,
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0xb800, 0xbc00, 0xc000, 0xc400, 0xc800, 0xcc00,
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0xd000
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};
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static const int mid_to_bit[21] =
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{
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0x0060, 0x0080, 0x00a0, 0x00c0, 0x00e0,
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0x0140, 0x0160, 0x0180, 0x01a0, 0x01c0, 0x1e0,
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0x0240, 0x0260, 0x0280, 0x02a0, 0x02c0, 0x02e0,
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0x0340, 0x0360, 0x0380, 0x03a0
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};
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static const int final_to_bit[28] =
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{
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1, 2, 3, 4, 5, 6, 7, 8, 9, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
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0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d
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};
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/* The conversion table from
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UCS4 Hangul Compatibility Jamo in [0x3131,0x3163]
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to Johab
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cf. 1. KS C 5601-1992 Annex 3 Table 2
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2. Unicode 2.0 manual
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*/
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static const uint16_t jamo_from_ucs_table[51] =
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{
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0x8841, 0x8c41,
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0x8444,
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0x9041,
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0x8446, 0x8447,
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0x9441, 0x9841, 0x9c41,
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0x844a, 0x844b, 0x844c, 0x844d, 0x884e, 0x884f, 0x8450,
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0xa041, 0xa441, 0xa841,
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0x8454,
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0xac41, 0xb041, 0xb441, 0xb841, 0xbc41,
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0xc041, 0xc441, 0xc841, 0xca41, 0xd041,
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0x8461, 0x8481, 0x84a1, 0x84c1, 0x84e1,
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0x8541, 0x8561, 0x8581, 0x85a1, 0x85c1, 0x85e1,
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0x8641, 0x8661, 0x8681, 0x86a1, 0x86c1, 0x86e1,
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0x8741, 0x8761, 0x8781, 0x87a1
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};
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static inline uint32_t
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johab_sym_hanja_to_ucs (uint_fast32_t idx, uint_fast32_t c1, uint_fast32_t c2)
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{
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if (idx <= 0xdefe)
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return (uint32_t) __ksc5601_sym_to_ucs[(c1 - 0xd9) * 188 + c2
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- (c2 > 0x90 ? 0x43 : 0x31)];
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else
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return (uint32_t) __ksc5601_hanja_to_ucs[(c1 - 0xe0) * 188 + c2
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- (c2 > 0x90 ? 0x43 : 0x31)];
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}
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/* Definitions used in the body of the `gconv' function. */
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#define CHARSET_NAME "JOHAB//"
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#define FROM_LOOP from_johab
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#define TO_LOOP to_johab
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#define DEFINE_INIT 1
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#define DEFINE_FINI 1
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#define MIN_NEEDED_FROM 1
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#define MAX_NEEDED_FROM 2
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#define MIN_NEEDED_TO 4
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/* First define the conversion function from JOHAB to UCS4. */
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#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
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#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
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#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
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#define LOOPFCT FROM_LOOP
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#define BODY \
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{ \
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uint32_t ch = *inptr; \
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\
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/* half-width Korean Currency WON sign \
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if (ch == 0x5c) \
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ch = 0x20a9; \
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else if (ch < 0x7f) \
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ch = (uint32_t) ch; \
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*/ \
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if (ch < 0x7f) \
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/* Plain ASCII. */ \
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++inptr; \
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/* Johab : 1. Hangul \
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1st byte : 0x84-0xd3 \
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2nd byte : 0x41-0x7e, 0x81-0xfe \
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2. Hanja & Symbol : \
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1st byte : 0xd8-0xde, 0xe0-0xf9 \
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2nd byte : 0x31-0x7e, 0x91-0xfe \
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0xd831-0xd87e and 0xd891-0xd8fe are user-defined area */ \
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else \
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{ \
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if (ch > 0xf9 || ch == 0xdf || (ch > 0x7e && ch < 0x84) \
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|| (ch > 0xd3 && ch < 0xd9)) \
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{ \
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/* These are illegal. */ \
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result = GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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else \
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{ \
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/* Two-byte character. First test whether the next \
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character is also available. */ \
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uint32_t ch2; \
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uint_fast32_t idx; \
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\
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if (NEED_LENGTH_TEST && inptr + 1 >= inend) \
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{ \
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/* The second character is not available. Store the \
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intermediate result. */ \
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result = GCONV_INCOMPLETE_INPUT; \
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break; \
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} \
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\
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ch2 = inptr[1]; \
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idx = ch * 256 + ch2; \
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if (ch <= 0xd3) \
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{ \
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/* Hangul */ \
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uint_fast32_t i, m, f; \
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\
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i = init[(idx & 0x7c00) >> 10]; \
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m = mid[(idx & 0x03e0) >> 5]; \
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f = final[idx & 0x001f]; \
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\
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if (i == -1 || m == -1 || f == -1) \
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{ \
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/* This is illegal. */ \
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result = GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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else if (i > 0 && m > 0) \
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ch = ((i - 1) * 21 + (m - 1)) * 28 + f + 0xac00; \
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else if (i > 0 && m == 0 && f == 0) \
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ch = init_to_ucs[i - 1]; \
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else if (i == 0 && m > 0 && f == 0) \
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ch = 0x314e + m; /* 0x314f + m - 1 */ \
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else if (i == 0 && m == 0 && f > 0) \
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ch = final_to_ucs[f - 1]; /* round trip?? */ \
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else \
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{ \
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/* This is illegal. */ \
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result = GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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} \
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else \
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{ \
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if (ch2 < 0x31 || (ch2 > 0x7e && ch2 < 0x91) || ch2 == 0xff) \
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{ \
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/* This is illegal. */ \
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result = GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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else if (ch == 0xda && ch2 > 0xa0 && ch2 < 0xd4) \
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{ \
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/* This is illegal. Modern Hangul Jaso is defined \
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elsewhere in Johab */ \
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result = GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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else \
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{ \
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ch = johab_sym_hanja_to_ucs (idx, ch, ch2); \
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/* if (idx <= 0xdefe) \
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ch = __ksc5601_sym_to_ucs[(ch - 0xd9) * 192 \
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+ ch2 - (ch2 > 0x90 \
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? 0x43 : 0x31)]; \
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else \
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ch = __ksc5601_hanja_to_ucs[(ch - 0xe0) *192 \
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+ ch2 - (ch2 > 0x90 \
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?0x43 : 0x31)];\
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*/ \
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} \
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} \
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} \
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\
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if (ch == 0) \
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{ \
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/* This is an illegal character. */ \
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result = GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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\
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inptr += 2; \
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} \
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\
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*((uint32_t *) outptr)++ = ch; \
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}
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#include <iconv/loop.c>
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/* Next, define the other direction. */
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#define MIN_NEEDED_INPUT MIN_NEEDED_TO
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#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
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#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
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#define LOOPFCT TO_LOOP
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#define BODY \
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{ \
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uint32_t ch = *((uint32_t *) inptr); \
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/* \
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if (ch >= (sizeof (from_ucs4_lat1) / sizeof (from_ucs4_lat1[0]))) \
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{ \
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if (ch >= 0x0391 && ch <= 0x0451) \
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cp = from_ucs4_greek[ch - 0x391]; \
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else if (ch >= 0x2010 && ch <= 0x9fa0) \
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cp = from_ucs4_cjk[ch - 0x02010]; \
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else \
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break; \
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} \
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else \
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cp = from_ucs4_lat1[ch]; \
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*/ \
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\
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if (ch < 0x7f) \
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*outptr++ = ch; \
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else \
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{ \
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if (ch >= 0xac00 && ch <= 0xd7a3) \
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{ \
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if (NEED_LENGTH_TEST && outptr + 2 > outend) \
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{ \
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result = GCONV_FULL_OUTPUT; \
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break; \
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} \
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\
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ch -= 0xac00; \
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\
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ch = (init_to_bit[ch / 588] /* 21 * 28 = 588 */ \
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+ mid_to_bit[(ch / 28) % 21]/* (ch % (21 * 28)) / 28 */ \
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+ final_to_bit[ch % 28]); /* (ch % (21 * 28)) % 28 */ \
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\
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*outptr++ = ch / 256; \
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*outptr++ = ch % 256; \
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} \
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/* KS C 5601-1992 Annex 3 regards 0xA4DA(Hangul Filler : U3164) \
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as symbol */ \
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else if (ch >= 0x3131 && ch <= 0x3163) \
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{ \
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ch = jamo_from_ucs_table[ch - 0x3131]; \
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\
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if (NEED_LENGTH_TEST && outptr + 2 > outend) \
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{ \
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result = GCONV_FULL_OUTPUT; \
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break; \
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} \
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\
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*outptr++ = ch / 256; \
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*outptr++ = ch % 256; \
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} \
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else if ((ch >= 0x4e00 && ch <= 0x9fa5) \
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|| (ch >= 0xf900 && ch <= 0xfa0b)) \
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{ \
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size_t written; \
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uint32_t temp; \
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\
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written = ucs4_to_ksc5601_hanja (ch, outptr, \
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(NEED_LENGTH_TEST \
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? outend - outptr : 2)); \
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if (NEED_LENGTH_TEST && written == 0) \
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{ \
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result = GCONV_FULL_OUTPUT; \
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break; \
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} \
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if (written == UNKNOWN_10646_CHAR) \
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{ \
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result = GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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\
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outptr[0] -= 0x4a; \
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outptr[1] -= 0x21; \
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\
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temp = outptr[0] * 94 + outptr[1]; \
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\
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outptr[0] = 0xe0 + temp / 188; \
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outptr[1] = temp % 188; \
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outptr[1] += outptr[1] >= 78 ? 0x43 : 0x31; \
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\
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outptr += 2; \
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} \
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else \
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{ \
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size_t written; \
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\
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written = ucs4_to_ksc5601_sym (ch, outptr, \
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(NEED_LENGTH_TEST \
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? outend - outptr : 2)); \
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if (NEED_LENGTH_TEST && written == 0) \
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{ \
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result = GCONV_FULL_OUTPUT; \
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break; \
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} \
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if (written == UNKNOWN_10646_CHAR) \
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{ \
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result = GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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\
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outptr[0] -= 0x4a; \
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outptr[1] += 0x80; \
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\
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outptr[1] += (outptr[0] % 2 \
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? 0 : (outptr[1] > 0xee ? 0x43 : 0x31)); \
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outptr[1] -= 0xa1; \
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outptr[0] /= 2; \
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outptr[0] += 0xe0; \
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\
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outptr += 2; \
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} \
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} \
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\
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inptr += 4; \
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}
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#include <iconv/loop.c>
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/* Now define the toplevel functions. */
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#include <iconv/skeleton.c>
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