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Annotation of embedaddon/libiconv/lib/cp949.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 1999-2001, 2005, 2007 Free Software Foundation, Inc.
                      3:  * This file is part of the GNU LIBICONV Library.
                      4:  *
                      5:  * The GNU LIBICONV Library is free software; you can redistribute it
                      6:  * and/or modify it under the terms of the GNU Library General Public
                      7:  * License as published by the Free Software Foundation; either version 2
                      8:  * of the License, or (at your option) any later version.
                      9:  *
                     10:  * The GNU LIBICONV Library is distributed in the hope that it will be
                     11:  * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
                     12:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     13:  * Library General Public License for more details.
                     14:  *
                     15:  * You should have received a copy of the GNU Library General Public
                     16:  * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
                     17:  * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
                     18:  * Fifth Floor, Boston, MA 02110-1301, USA.
                     19:  */
                     20: 
                     21: /*
                     22:  * CP949 is EUC-KR, extended with UHC (Unified Hangul Code).
                     23:  *
                     24:  * Some variants of CP949 (in JDK, Windows-2000, ICU) also add:
                     25:  *
                     26:  * 2. Private area mappings:
                     27:  *
                     28:  *        code           Unicode
                     29:  *    0xC9{A1..FE}   U+E000..U+E05D
                     30:  *    0xFE{A1..FE}   U+E05E..U+E0BB
                     31:  *
                     32:  * We add them too because, although there are backward compatibility problems
                     33:  * when a character from a private area is moved to an official Unicode code
                     34:  * point, they are useful for some people in practice.
                     35:  */
                     36: 
                     37: #include "uhc_1.h"
                     38: #include "uhc_2.h"
                     39: 
                     40: static int
                     41: cp949_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
                     42: {
                     43:   unsigned char c = *s;
                     44:   /* Code set 0 (ASCII) */
                     45:   if (c < 0x80)
                     46:     return ascii_mbtowc(conv,pwc,s,n);
                     47:   /* UHC part 1 */
                     48:   if (c >= 0x81 && c <= 0xa0)
                     49:     return uhc_1_mbtowc(conv,pwc,s,n);
                     50:   if (c >= 0xa1 && c < 0xff) {
                     51:     if (n < 2)
                     52:       return RET_TOOFEW(0);
                     53:     {
                     54:       unsigned char c2 = s[1];
                     55:       if (c2 < 0xa1)
                     56:         /* UHC part 2 */
                     57:         return uhc_2_mbtowc(conv,pwc,s,n);
                     58:       else if (c2 < 0xff && !(c == 0xa2 && c2 == 0xe8)) {
                     59:         /* Code set 1 (KS C 5601-1992, now KS X 1001:1998) */
                     60:         unsigned char buf[2];
                     61:         int ret;
                     62:         buf[0] = c-0x80; buf[1] = c2-0x80;
                     63:         ret = ksc5601_mbtowc(conv,pwc,buf,2);
                     64:         if (ret != RET_ILSEQ)
                     65:           return ret;
                     66:         /* User-defined characters */
                     67:         if (c == 0xc9) {
                     68:           *pwc = 0xe000 + (c2 - 0xa1);
                     69:           return 2;
                     70:         }
                     71:         if (c == 0xfe) {
                     72:           *pwc = 0xe05e + (c2 - 0xa1);
                     73:           return 2;
                     74:         }
                     75:       }
                     76:     }
                     77:   }
                     78:   return RET_ILSEQ;
                     79: }
                     80: 
                     81: static int
                     82: cp949_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
                     83: {
                     84:   unsigned char buf[2];
                     85:   int ret;
                     86: 
                     87:   /* Code set 0 (ASCII) */
                     88:   ret = ascii_wctomb(conv,r,wc,n);
                     89:   if (ret != RET_ILUNI)
                     90:     return ret;
                     91: 
                     92:   /* Code set 1 (KS C 5601-1992, now KS X 1001:1998) */
                     93:   if (wc != 0x327e) {
                     94:     ret = ksc5601_wctomb(conv,buf,wc,2);
                     95:     if (ret != RET_ILUNI) {
                     96:       if (ret != 2) abort();
                     97:       if (n < 2)
                     98:         return RET_TOOSMALL;
                     99:       r[0] = buf[0]+0x80;
                    100:       r[1] = buf[1]+0x80;
                    101:       return 2;
                    102:     }
                    103:   }
                    104: 
                    105:   /* UHC */
                    106:   if (wc >= 0xac00 && wc < 0xd7a4) {
                    107:     if (wc < 0xc8a5)
                    108:       return uhc_1_wctomb(conv,r,wc,n);
                    109:     else
                    110:       return uhc_2_wctomb(conv,r,wc,n);
                    111:   }
                    112: 
                    113:   /* User-defined characters */
                    114:   if (wc >= 0xe000 && wc < 0xe0bc) {
                    115:     if (n < 2)
                    116:       return RET_TOOSMALL;
                    117:     if (wc < 0xe05e) {
                    118:       r[0] = 0xc9;
                    119:       r[1] = wc - 0xe000 + 0xa1;
                    120:     } else {
                    121:       r[0] = 0xfe;
                    122:       r[1] = wc - 0xe05e + 0xa1;
                    123:     }
                    124:     return 2;
                    125:   }
                    126: 
                    127:   return RET_ILUNI;
                    128: }