kc3-lang/libiconv/lib/gb12345.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/gb12345.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/>.
   */
  
  /*
   * GB/T 12345-1990
   */
  
  /*
   * GB/T 12345-1990 is a traditional chinese counterpart of GB 2312-1986.
   * According to the unicode.org tables:
   * 2146 characters have been changed to their traditional counterpart,
   * 103 characters have been added, no characters have been removed.
   * Therefore we use an auxiliary table, which contains only the changes.
   */
  
  #include "gb12345ext.h"
  
  static int
  gb12345_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
  {
    int ret;
  
    /* The gb12345ext table overrides some entries in the gb2312 table. */
    /* Try the GB12345 extensions -> Unicode table. */
    ret = gb12345ext_mbtowc(conv,pwc,s,n);
    if (ret != RET_ILSEQ)
      return ret;
    /* Try the GB2312 -> Unicode table. */
    ret = gb2312_mbtowc(conv,pwc,s,n);
    return ret;
  }
  
  static int
  gb12345_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
  {
    int ret;
  
    /* The gb12345ext table overrides some entries in the gb2312 table. */
    /* Try the Unicode -> GB12345 extensions table. */
    ret = gb12345ext_wctomb(conv,r,wc,n);
    if (ret != RET_ILUNI)
      return ret;
    /* Try the Unicode -> GB2312 table, and check that the resulting GB2312
       byte sequence is not overridden by the GB12345 extensions table. */
    ret = gb2312_wctomb(conv,r,wc,n);
    if (ret == 2 && gb12345ext_mbtowc(conv,&wc,r,2) == 2)
      return RET_ILUNI;
    else
      return ret;
  }