lib/jisx0201.h

   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 Lesser General Public
   7  * License as published by the Free Software Foundation; either version 2.1
   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  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser 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  * JISX0201.1976-0
  22  */
  23
  24 static int
  25 jisx0201_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
  26 {
  27   unsigned char c = *s;
  28   if (c < 0x80) {
  29     if (c == 0x5c)
  30       *pwc = (ucs4_t) 0x00a5;
  31     else if (c == 0x7e)
  32       *pwc = (ucs4_t) 0x203e;
  33     else
  34       *pwc = (ucs4_t) c;
  35     return 1;
  36   } else {
  37     if (c >= 0xa1 && c < 0xe0) {
  38       *pwc = (ucs4_t) c + 0xfec0;
  39       return 1;
  40     }
  41   }
  42   return RET_ILSEQ;
  43 }
  44
  45 static int
  46 jisx0201_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
  47 {
  48   if (wc < 0x0080 && !(wc == 0x005c || wc == 0x007e)) {
  49     *r = wc;
  50     return 1;
  51   }
  52   if (wc == 0x00a5) {
  53     *r = 0x5c;
  54     return 1;
  55   }
  56   if (wc == 0x203e) {
  57     *r = 0x7e;
  58     return 1;
  59   }
  60   if (wc >= 0xff61 && wc < 0xffa0) {
  61     *r = wc - 0xfec0;
  62     return 1;
  63   }
  64   return RET_ILUNI;
  65 }