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thodg/libiconv/lib/ces_big5.h

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  • Author : Bruno Haible
    Date : 2005-05-19 17:14:19
    Hash : 45bd190c
    Message : Update FSF postal address.

  • lib/ces_big5.h
  • /*
     * Copyright (C) 1999-2001 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 Library General Public
     * License as published by the Free Software Foundation; either version 2
     * 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
     * Library General Public License for more details.
     *
     * You should have received a copy of the GNU Library General Public
     * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
     * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
     * Fifth Floor, Boston, MA 02110-1301, USA.
     */
    
    /*
     * BIG-5
     */
    
    static int
    ces_big5_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
    {
      unsigned char c = *s;
      /* Code set 0 (ASCII) */
      if (c < 0x80)
        return ascii_mbtowc(conv,pwc,s,n);
      /* Code set 1 (BIG5) */
      if (c >= 0xa1 && c < 0xff) {
        if (n < 2)
          return RET_TOOFEW(0);
        {
          unsigned char c2 = s[1];
          if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff))
            return big5_mbtowc(conv,pwc,s,2);
          else
            return RET_ILSEQ;
        }
      }
      return RET_ILSEQ;
    }
    
    static int
    ces_big5_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
    {
      unsigned char buf[2];
      int ret;
    
      /* Code set 0 (ASCII) */
      ret = ascii_wctomb(conv,r,wc,n);
      if (ret != RET_ILUNI)
        return ret;
    
      /* Code set 1 (BIG5) */
      ret = big5_wctomb(conv,buf,wc,2);
      if (ret != RET_ILUNI) {
        if (ret != 2) abort();
        if (n < 2)
          return RET_TOOSMALL;
        r[0] = buf[0];
        r[1] = buf[1];
        return 2;
      }
    
      return RET_ILUNI;
    }