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libiconv

    1: /*
    2:  * Copyright (C) 1999-2001 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, write to the Free Software Foundation, Inc., 51 Franklin Street,
   18:  * Fifth Floor, Boston, MA 02110-1301, USA.
   19:  */
   20: 
   21: /*
   22:  * ISO646-CN
   23:  * also known as GB_1988-80
   24:  */
   25: 
   26: static int
   27: iso646_cn_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
   28: {
   29:   unsigned char c = *s;
   30:   if (c < 0x80) {
   31:     if (c == 0x24)
   32:       *pwc = (ucs4_t) 0x00a5;
   33:     else if (c == 0x7e)
   34:       *pwc = (ucs4_t) 0x203e;
   35:     else
   36:       *pwc = (ucs4_t) c;
   37:     return 1;
   38:   }
   39:   return RET_ILSEQ;
   40: }
   41: 
   42: static int
   43: iso646_cn_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
   44: {
   45:   if (wc < 0x0080 && !(wc == 0x0024 || wc == 0x007e)) {
   46:     *r = wc;
   47:     return 1;
   48:   }
   49:   if (wc == 0x00a5) {
   50:     *r = 0x24;
   51:     return 1;
   52:   }
   53:   if (wc == 0x203e) {
   54:     *r = 0x7e;
   55:     return 1;
   56:   }
   57:   return RET_ILUNI;
   58: }