128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
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* Copyright (C) 1999-2001, 2005, 2007, 2016 Free Software Foundation, Inc.
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* This file is part of the GNU LIBICONV Library.
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*
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* The GNU LIBICONV Library is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* The GNU LIBICONV Library is distributed in the hope that it will be
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* useful, 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
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* If not, see <https://www.gnu.org/licenses/>.
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*/
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/*
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* CP949 is EUC-KR, extended with UHC (Unified Hangul Code).
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*
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* Some variants of CP949 (in JDK, Windows-2000, ICU) also add:
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*
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* 2. Private area mappings:
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*
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* code Unicode
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* 0xC9{A1..FE} U+E000..U+E05D
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* 0xFE{A1..FE} U+E05E..U+E0BB
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*
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* We add them too because, although there are backward compatibility problems
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* when a character from a private area is moved to an official Unicode code
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* point, they are useful for some people in practice.
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*/
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#include "uhc_1.h"
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#include "uhc_2.h"
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static int
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cp949_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
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{
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unsigned char c = *s;
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/* Code set 0 (ASCII) */
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if (c < 0x80)
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return ascii_mbtowc(conv,pwc,s,n);
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/* UHC part 1 */
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if (c >= 0x81 && c <= 0xa0)
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return uhc_1_mbtowc(conv,pwc,s,n);
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if (c >= 0xa1 && c < 0xff) {
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if (n < 2)
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return RET_TOOFEW(0);
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{
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unsigned char c2 = s[1];
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if (c2 < 0xa1)
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/* UHC part 2 */
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return uhc_2_mbtowc(conv,pwc,s,n);
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else if (c2 < 0xff && !(c == 0xa2 && c2 == 0xe8)) {
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/* Code set 1 (KS C 5601-1992, now KS X 1001:1998) */
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unsigned char buf[2];
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int ret;
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buf[0] = c-0x80; buf[1] = c2-0x80;
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ret = ksc5601_mbtowc(conv,pwc,buf,2);
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if (ret != RET_ILSEQ)
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return ret;
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/* User-defined characters */
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if (c == 0xc9) {
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*pwc = 0xe000 + (c2 - 0xa1);
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return 2;
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}
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if (c == 0xfe) {
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*pwc = 0xe05e + (c2 - 0xa1);
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return 2;
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}
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}
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}
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}
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return RET_ILSEQ;
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}
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static int
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cp949_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
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{
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unsigned char buf[2];
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int ret;
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/* Code set 0 (ASCII) */
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ret = ascii_wctomb(conv,r,wc,n);
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if (ret != RET_ILUNI)
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return ret;
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/* Code set 1 (KS C 5601-1992, now KS X 1001:1998) */
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if (wc != 0x327e) {
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ret = ksc5601_wctomb(conv,buf,wc,2);
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if (ret != RET_ILUNI) {
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if (ret != 2) abort();
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if (n < 2)
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return RET_TOOSMALL;
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r[0] = buf[0]+0x80;
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r[1] = buf[1]+0x80;
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return 2;
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}
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}
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/* UHC */
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if (wc >= 0xac00 && wc < 0xd7a4) {
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if (wc < 0xc8a5)
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return uhc_1_wctomb(conv,r,wc,n);
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else
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return uhc_2_wctomb(conv,r,wc,n);
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}
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/* User-defined characters */
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if (wc >= 0xe000 && wc < 0xe0bc) {
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if (n < 2)
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return RET_TOOSMALL;
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if (wc < 0xe05e) {
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r[0] = 0xc9;
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r[1] = wc - 0xe000 + 0xa1;
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} else {
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r[0] = 0xfe;
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r[1] = wc - 0xe05e + 0xa1;
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}
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return 2;
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}
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return RET_ILUNI;
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}
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