kc3-lang/libiconv/lib/euc_tw.h

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• Hash : 91f96be0
  Author :
  Date : 2021-06-06T11:51:12
  

  Change the license of the library from LGPL 2.0 to LGPL 2.1.
  

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• lib/euc_tw.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/>.
   */
  
  /*
   * EUC-TW
   */
  
  static int
  euc_tw_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
  {
    unsigned char c = *s;
    /* Code set 0 (ASCII) */
    if (c < 0x80)
      return ascii_mbtowc(conv,pwc,s,n);
    /* Code set 1 (CNS 11643-1992 Plane 1) */
    if (c >= 0xa1 && c < 0xff) {
      if (n < 2)
        return RET_TOOFEW(0);
      {
        unsigned char c2 = s[1];
        if (c2 >= 0xa1 && c2 < 0xff) {
          unsigned char buf[2];
          buf[0] = c-0x80; buf[1] = c2-0x80;
          return cns11643_1_mbtowc(conv,pwc,buf,2);
        } else
          return RET_ILSEQ;
      }
    }
    /* Code set 2 (CNS 11643-1992 Planes 1-16) */
    if (c == 0x8e) {
      if (n < 4)
        return RET_TOOFEW(0);
      {
        unsigned char c2 = s[1];
        if (c2 >= 0xa1 && c2 <= 0xb0) {
          unsigned char c3 = s[2];
          unsigned char c4 = s[3];
          if (c3 >= 0xa1 && c3 < 0xff && c4 >= 0xa1 && c4 < 0xff) {
            unsigned char buf[2];
            int ret;
            buf[0] = c3-0x80; buf[1] = c4-0x80;
            switch (c2-0xa0) {
              case 1: ret = cns11643_1_mbtowc(conv,pwc,buf,2); break;
              case 2: ret = cns11643_2_mbtowc(conv,pwc,buf,2); break;
              case 3: ret = cns11643_3_mbtowc(conv,pwc,buf,2); break;
              case 4: ret = cns11643_4_mbtowc(conv,pwc,buf,2); break;
              case 5: ret = cns11643_5_mbtowc(conv,pwc,buf,2); break;
              case 6: ret = cns11643_6_mbtowc(conv,pwc,buf,2); break;
              case 7: ret = cns11643_7_mbtowc(conv,pwc,buf,2); break;
              case 15: ret = cns11643_15_mbtowc(conv,pwc,buf,2); break;
              default: return RET_ILSEQ;
            }
            if (ret == RET_ILSEQ)
              return RET_ILSEQ;
            if (ret != 2) abort();
            return 4;
          }
        }
      }
    }
    return RET_ILSEQ;
  }
  
  static int
  euc_tw_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
  {
    unsigned char buf[3];
    int ret;
  
    /* Code set 0 (ASCII) */
    ret = ascii_wctomb(conv,r,wc,n);
    if (ret != RET_ILUNI)
      return ret;
  
    ret = cns11643_wctomb(conv,buf,wc,3);
    if (ret != RET_ILUNI) {
      if (ret != 3) abort();
  
      /* Code set 1 (CNS 11643-1992 Plane 1) */
      if (buf[0] == 1) {
        if (n < 2)
          return RET_TOOSMALL;
        r[0] = buf[1]+0x80;
        r[1] = buf[2]+0x80;
        return 2;
      }
  
      /* Code set 2 (CNS 11643-1992 Planes 1-16) */
      if (n < 4)
        return RET_TOOSMALL;
      r[0] = 0x8e;
      r[1] = buf[0]+0xa0;
      r[2] = buf[1]+0x80;
      r[3] = buf[2]+0x80;
      return 4;
    }
  
    return RET_ILUNI;
  }
  

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