lib/iso646_jp.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-JP
  23  * also known as JIS_C6220-1969-RO
  24  */
  25
  26 /* This is the lower half of JIS_X0201. */
  27
  28 static int
  29 iso646_jp_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
  30 {
  31   unsigned char c = *s;
  32   if (c < 0x80) {
  33     if (c == 0x5c)
  34       *pwc = (ucs4_t) 0x00a5;
  35     else if (c == 0x7e)
  36       *pwc = (ucs4_t) 0x203e;
  37     else
  38       *pwc = (ucs4_t) c;
  39     return 1;
  40   }
  41   return RET_ILSEQ;
  42 }
  43
  44 static int
  45 iso646_jp_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
  46 {
  47   if (wc < 0x0080 && !(wc == 0x005c || wc == 0x007e)) {
  48     *r = wc;
  49     return 1;
  50   }
  51   if (wc == 0x00a5) {
  52     *r = 0x5c;
  53     return 1;
  54   }
  55   if (wc == 0x203e) {
  56     *r = 0x7e;
  57     return 1;
  58   }
  59   return RET_ILSEQ;
  60 }