kmx git

/*
 * Copyright (C) 1999-2001, 2016 Free Software Foundation, Inc.
 * This file is part of the GNU LIBICONV Library.
 *
 * The GNU LIBICONV Library is free software; you can redistribute it
 * and/or modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * The GNU LIBICONV Library is distributed in the hope that it will be
 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
 * If not, see <https://www.gnu.org/licenses/>.
 */

/*
 * JISX0201.1976-0
 */

static int
jisx0201_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
{
  unsigned char c = *s;
  if (c < 0x80) {
    if (c == 0x5c)
      *pwc = (ucs4_t) 0x00a5;
    else if (c == 0x7e)
      *pwc = (ucs4_t) 0x203e;
    else
      *pwc = (ucs4_t) c;
    return 1;
  } else {
    if (c >= 0xa1 && c < 0xe0) {
      *pwc = (ucs4_t) c + 0xfec0;
      return 1;
    }
  }
  return RET_ILSEQ;
}

static int
jisx0201_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
{
  if (wc < 0x0080 && !(wc == 0x005c || wc == 0x007e)) {
    *r = wc;
    return 1;
  }
  if (wc == 0x00a5) {
    *r = 0x5c;
    return 1;
  }
  if (wc == 0x203e) {
    *r = 0x7e;
    return 1;
  }
  if (wc >= 0xff61 && wc < 0xffa0) {
    *r = wc - 0xfec0;
    return 1;
  }
  return RET_ILUNI;
}
thodg/libiconv/lib/jisx0201.h

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lib/jisx0201.h
