kc3-lang/libiconv/lib/cns11643_4.h

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• Author : Bruno Haible
  Date : 2021-06-06 11:51:12
  Hash : 91f96be0
  Message : Change the license of the library from LGPL 2.0 to LGPL 2.1.

• lib/cns11643_4.h

• /*
   * Copyright (C) 1999-2001, 2016 Free Software Foundation, Inc.
   * This file is part of the GNU LIBICONV Library.
   *
   * The GNU LIBICONV Library is free software; you can redistribute it
   * and/or modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either version 2.1
   * of the License, or (at your option) any later version.
   *
   * The GNU LIBICONV 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
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
   * If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * CNS 11643-1992 plane 4
   */
  
  /*
   * The table has been split into two parts. Each part's entries fit it 16 bits.
   * But the combined table would need 17 bits per entry.
   */
  #include "cns11643_4a.h"
  #include "cns11643_4b.h"
  
  static int
  cns11643_4_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
  {
    unsigned char c1 = s[0];
    if ((c1 >= 0x21 && c1 <= 0x6e)) {
      if (n >= 2) {
        unsigned char c2 = s[1];
        if (c2 >= 0x21 && c2 < 0x7f) {
          unsigned int i = 94 * (c1 - 0x21) + (c2 - 0x21);
          ucs4_t wc = 0xfffd;
          unsigned short swc;
          {
            if (i < 2914)
              swc = cns11643_4a_2uni_page21[i],
              wc = cns11643_4a_2uni_upages[swc>>8] | (swc & 0xff);
            else if (i < 7298)
              swc = cns11643_4b_2uni_page40[i-2914],
              wc = cns11643_4b_2uni_upages[swc>>8] | (swc & 0xff);
          }
          if (wc != 0xfffd) {
            *pwc = wc;
            return 2;
          }
        }
        return RET_ILSEQ;
      }
      return RET_TOOFEW(0);
    }
    return RET_ILSEQ;
  }