lib/iso646_jp.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  * ISO646-JP
  22  * also known as JIS_C6220-1969-RO
  23  */
  24
  25 /* This is the lower half of JIS_X0201. */
  26
  27 static int
  28 iso646_jp_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
  29 {
  30   unsigned char c = *s;
  31   if (c < 0x80) {
  32     if (c == 0x5c)
  33       *pwc = (ucs4_t) 0x00a5;
  34     else if (c == 0x7e)
  35       *pwc = (ucs4_t) 0x203e;
  36     else
  37       *pwc = (ucs4_t) c;
  38     return 1;
  39   }
  40   return RET_ILSEQ;
  41 }
  42
  43 static int
  44 iso646_jp_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
  45 {
  46   if (wc < 0x0080 && !(wc == 0x005c || wc == 0x007e)) {
  47     *r = wc;
  48     return 1;
  49   }
  50   if (wc == 0x00a5) {
  51     *r = 0x5c;
  52     return 1;
  53   }
  54   if (wc == 0x203e) {
  55     *r = 0x7e;
  56     return 1;
  57   }
  58   return RET_ILUNI;
  59 }