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libiconv 1.16

    1: /*
    2:  * Copyright (C) 1999-2001, 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:  * GB/T 12345-1990
   22:  */
   23: 
   24: /*
   25:  * GB/T 12345-1990 is a traditional chinese counterpart of GB 2312-1986.
   26:  * According to the unicode.org tables:
   27:  * 2146 characters have been changed to their traditional counterpart,
   28:  * 103 characters have been added, no characters have been removed.
   29:  * Therefore we use an auxiliary table, which contains only the changes.
   30:  */
   31: 
   32: #include "gb12345ext.h"
   33: 
   34: static int
   35: gb12345_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
   36: {
   37:   int ret;
   38: 
   39:   /* The gb12345ext table overrides some entries in the gb2312 table. */
   40:   /* Try the GB12345 extensions -> Unicode table. */
   41:   ret = gb12345ext_mbtowc(conv,pwc,s,n);
   42:   if (ret != RET_ILSEQ)
   43:     return ret;
   44:   /* Try the GB2312 -> Unicode table. */
   45:   ret = gb2312_mbtowc(conv,pwc,s,n);
   46:   return ret;
   47: }
   48: 
   49: static int
   50: gb12345_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
   51: {
   52:   int ret;
   53: 
   54:   /* The gb12345ext table overrides some entries in the gb2312 table. */
   55:   /* Try the Unicode -> GB12345 extensions table. */
   56:   ret = gb12345ext_wctomb(conv,r,wc,n);
   57:   if (ret != RET_ILUNI)
   58:     return ret;
   59:   /* Try the Unicode -> GB2312 table, and check that the resulting GB2312
   60:      byte sequence is not overridden by the GB12345 extensions table. */
   61:   ret = gb2312_wctomb(conv,r,wc,n);
   62:   if (ret == 2 && gb12345ext_mbtowc(conv,&wc,r,2) == 2)
   63:     return RET_ILUNI;
   64:   else
   65:     return ret;
   66: }