lib/iso646_cn.h

   1 /*
   2  * Copyright (C) 1999-2000 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., 59 Temple Place -
  18  * Suite 330, Boston, MA 02111-1307, 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_ILSEQ;
  58 }