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libiconv 1.16

    1: /*
    2:  * Copyright (C) 1999-2001, 2012, 2016 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, see <https://www.gnu.org/licenses/>.
   18:  */
   19: 
   20: /*
   21:  * CP950 extensions
   22:  */
   23: 
   24: static const unsigned short cp950ext_2uni_pagef9[157-116] = {
   25:   /* 0xf9 */
   26:                                   0x7881, 0x92b9, 0x88cf, 0x58bb,
   27:   0x6052, 0x7ca7, 0x5afa, 0x2554, 0x2566, 0x2557, 0x2560, 0x256c,
   28:   0x2563, 0x255a, 0x2569, 0x255d, 0x2552, 0x2564, 0x2555, 0x255e,
   29:   0x256a, 0x2561, 0x2558, 0x2567, 0x255b, 0x2553, 0x2565, 0x2556,
   30:   0x255f, 0x256b, 0x2562, 0x2559, 0x2568, 0x255c, 0x2551, 0x2550,
   31:   0x256d, 0x256e, 0x2570, 0x256f, 0x2593,
   32: };
   33: 
   34: static int
   35: cp950ext_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
   36: {
   37:   unsigned char c1 = s[0];
   38:   if ((c1 == 0xf9)) {
   39:     if (n >= 2) {
   40:       unsigned char c2 = s[1];
   41:       if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff)) {
   42:         unsigned int i = 157 * (c1 - 0xa1) + (c2 - (c2 >= 0xa1 ? 0x62 : 0x40));
   43:         unsigned short wc = 0xfffd;
   44:         {
   45:           if (i >= 13932 && i < 13973)
   46:             wc = cp950ext_2uni_pagef9[i-13932];
   47:         }
   48:         if (wc != 0xfffd) {
   49:           *pwc = (ucs4_t) wc;
   50:           return 2;
   51:         }
   52:       }
   53:       return RET_ILSEQ;
   54:     }
   55:     return RET_TOOFEW(0);
   56:   }
   57:   return RET_ILSEQ;
   58: }
   59: 
   60: static const unsigned short cp950ext_2charset[41] = {
   61:   0xf9f9, 0xf9f8, 0xf9e6, 0xf9ef, 0xf9dd, 0xf9e8, 0xf9f1, 0xf9df,
   62:   0xf9ec, 0xf9f5, 0xf9e3, 0xf9ee, 0xf9f7, 0xf9e5, 0xf9e9, 0xf9f2,
   63:   0xf9e0, 0xf9eb, 0xf9f4, 0xf9e2, 0xf9e7, 0xf9f0, 0xf9de, 0xf9ed,
   64:   0xf9f6, 0xf9e4, 0xf9ea, 0xf9f3, 0xf9e1, 0xf9fa, 0xf9fb, 0xf9fd,
   65:   0xf9fc, 0xf9fe, 0xf9d9, 0xf9dc, 0xf9da, 0xf9d6, 0xf9db, 0xf9d8,
   66:   0xf9d7,
   67: };
   68: 
   69: static const Summary16 cp950ext_uni2indx_page25[10] = {
   70:   /* 0x2500 */
   71:   {    0, 0x0000 }, {    0, 0x0000 }, {    0, 0x0000 }, {    0, 0x0000 },
   72:   {    0, 0x0000 }, {    0, 0xffff }, {   16, 0xffff }, {   32, 0x0001 },
   73:   {   33, 0x0000 }, {   33, 0x0008 },
   74: };
   75: static const Summary16 cp950ext_uni2indx_page58[12] = {
   76:   /* 0x5800 */
   77:   {   34, 0x0000 }, {   34, 0x0000 }, {   34, 0x0000 }, {   34, 0x0000 },
   78:   {   34, 0x0000 }, {   34, 0x0000 }, {   34, 0x0000 }, {   34, 0x0000 },
   79:   {   34, 0x0000 }, {   34, 0x0000 }, {   34, 0x0000 }, {   34, 0x0800 },
   80: };
   81: static const Summary16 cp950ext_uni2indx_page5a[16] = {
   82:   /* 0x5a00 */
   83:   {   35, 0x0000 }, {   35, 0x0000 }, {   35, 0x0000 }, {   35, 0x0000 },
   84:   {   35, 0x0000 }, {   35, 0x0000 }, {   35, 0x0000 }, {   35, 0x0000 },
   85:   {   35, 0x0000 }, {   35, 0x0000 }, {   35, 0x0000 }, {   35, 0x0000 },
   86:   {   35, 0x0000 }, {   35, 0x0000 }, {   35, 0x0000 }, {   35, 0x0400 },
   87: };
   88: static const Summary16 cp950ext_uni2indx_page60[6] = {
   89:   /* 0x6000 */
   90:   {   36, 0x0000 }, {   36, 0x0000 }, {   36, 0x0000 }, {   36, 0x0000 },
   91:   {   36, 0x0000 }, {   36, 0x0004 },
   92: };
   93: static const Summary16 cp950ext_uni2indx_page78[9] = {
   94:   /* 0x7800 */
   95:   {   37, 0x0000 }, {   37, 0x0000 }, {   37, 0x0000 }, {   37, 0x0000 },
   96:   {   37, 0x0000 }, {   37, 0x0000 }, {   37, 0x0000 }, {   37, 0x0000 },
   97:   {   37, 0x0002 },
   98: };
   99: static const Summary16 cp950ext_uni2indx_page7c[11] = {
  100:   /* 0x7c00 */
  101:   {   38, 0x0000 }, {   38, 0x0000 }, {   38, 0x0000 }, {   38, 0x0000 },
  102:   {   38, 0x0000 }, {   38, 0x0000 }, {   38, 0x0000 }, {   38, 0x0000 },
  103:   {   38, 0x0000 }, {   38, 0x0000 }, {   38, 0x0080 },
  104: };
  105: static const Summary16 cp950ext_uni2indx_page88[13] = {
  106:   /* 0x8800 */
  107:   {   39, 0x0000 }, {   39, 0x0000 }, {   39, 0x0000 }, {   39, 0x0000 },
  108:   {   39, 0x0000 }, {   39, 0x0000 }, {   39, 0x0000 }, {   39, 0x0000 },
  109:   {   39, 0x0000 }, {   39, 0x0000 }, {   39, 0x0000 }, {   39, 0x0000 },
  110:   {   39, 0x8000 },
  111: };
  112: static const Summary16 cp950ext_uni2indx_page92[12] = {
  113:   /* 0x9200 */
  114:   {   40, 0x0000 }, {   40, 0x0000 }, {   40, 0x0000 }, {   40, 0x0000 },
  115:   {   40, 0x0000 }, {   40, 0x0000 }, {   40, 0x0000 }, {   40, 0x0000 },
  116:   {   40, 0x0000 }, {   40, 0x0000 }, {   40, 0x0000 }, {   40, 0x0200 },
  117: };
  118: 
  119: static int
  120: cp950ext_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
  121: {
  122:   if (n >= 2) {
  123:     const Summary16 *summary = NULL;
  124:     if (wc >= 0x2500 && wc < 0x25a0)
  125:       summary = &cp950ext_uni2indx_page25[(wc>>4)-0x250];
  126:     else if (wc >= 0x5800 && wc < 0x58c0)
  127:       summary = &cp950ext_uni2indx_page58[(wc>>4)-0x580];
  128:     else if (wc >= 0x5a00 && wc < 0x5b00)
  129:       summary = &cp950ext_uni2indx_page5a[(wc>>4)-0x5a0];
  130:     else if (wc >= 0x6000 && wc < 0x6060)
  131:       summary = &cp950ext_uni2indx_page60[(wc>>4)-0x600];
  132:     else if (wc >= 0x7800 && wc < 0x7890)
  133:       summary = &cp950ext_uni2indx_page78[(wc>>4)-0x780];
  134:     else if (wc >= 0x7c00 && wc < 0x7cb0)
  135:       summary = &cp950ext_uni2indx_page7c[(wc>>4)-0x7c0];
  136:     else if (wc >= 0x8800 && wc < 0x88d0)
  137:       summary = &cp950ext_uni2indx_page88[(wc>>4)-0x880];
  138:     else if (wc >= 0x9200 && wc < 0x92c0)
  139:       summary = &cp950ext_uni2indx_page92[(wc>>4)-0x920];
  140:     if (summary) {
  141:       unsigned short used = summary->used;
  142:       unsigned int i = wc & 0x0f;
  143:       if (used & ((unsigned short) 1 << i)) {
  144:         unsigned short c;
  145:         /* Keep in 'used' only the bits 0..i-1. */
  146:         used &= ((unsigned short) 1 << i) - 1;
  147:         /* Add 'summary->indx' and the number of bits set in 'used'. */
  148:         used = (used & 0x5555) + ((used & 0xaaaa) >> 1);
  149:         used = (used & 0x3333) + ((used & 0xcccc) >> 2);
  150:         used = (used & 0x0f0f) + ((used & 0xf0f0) >> 4);
  151:         used = (used & 0x00ff) + (used >> 8);
  152:         c = cp950ext_2charset[summary->indx + used];
  153:         r[0] = (c >> 8); r[1] = (c & 0xff);
  154:         return 2;
  155:       }
  156:     }
  157:     return RET_ILUNI;
  158:   }
  159:   return RET_TOOSMALL;
  160: }