/*
 * 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/>.
 */

/*
 * ISO-8859-16
 */

static const unsigned short iso8859_16_2uni[96] = {
  /* 0xa0 */
  0x00a0, 0x0104, 0x0105, 0x0141, 0x20ac, 0x201e, 0x0160, 0x00a7,
  0x0161, 0x00a9, 0x0218, 0x00ab, 0x0179, 0x00ad, 0x017a, 0x017b,
  /* 0xb0 */
  0x00b0, 0x00b1, 0x010c, 0x0142, 0x017d, 0x201d, 0x00b6, 0x00b7,
  0x017e, 0x010d, 0x0219, 0x00bb, 0x0152, 0x0153, 0x0178, 0x017c,
  /* 0xc0 */
  0x00c0, 0x00c1, 0x00c2, 0x0102, 0x00c4, 0x0106, 0x00c6, 0x00c7,
  0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
  /* 0xd0 */
  0x0110, 0x0143, 0x00d2, 0x00d3, 0x00d4, 0x0150, 0x00d6, 0x015a,
  0x0170, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x0118, 0x021a, 0x00df,
  /* 0xe0 */
  0x00e0, 0x00e1, 0x00e2, 0x0103, 0x00e4, 0x0107, 0x00e6, 0x00e7,
  0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
  /* 0xf0 */
  0x0111, 0x0144, 0x00f2, 0x00f3, 0x00f4, 0x0151, 0x00f6, 0x015b,
  0x0171, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x0119, 0x021b, 0x00ff,
};

static int
iso8859_16_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
{
  unsigned char c = *s;
  if (c < 0xa0)
    *pwc = (ucs4_t) c;
  else
    *pwc = (ucs4_t) iso8859_16_2uni[c-0xa0];
  return 1;
}

static const unsigned char iso8859_16_page00[224] = {
  0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa7, /* 0xa0-0xa7 */
  0x00, 0xa9, 0x00, 0xab, 0x00, 0xad, 0x00, 0x00, /* 0xa8-0xaf */
  0xb0, 0xb1, 0x00, 0x00, 0x00, 0x00, 0xb6, 0xb7, /* 0xb0-0xb7 */
  0x00, 0x00, 0x00, 0xbb, 0x00, 0x00, 0x00, 0x00, /* 0xb8-0xbf */
  0xc0, 0xc1, 0xc2, 0x00, 0xc4, 0x00, 0xc6, 0xc7, /* 0xc0-0xc7 */
  0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
  0x00, 0x00, 0xd2, 0xd3, 0xd4, 0x00, 0xd6, 0x00, /* 0xd0-0xd7 */
  0x00, 0xd9, 0xda, 0xdb, 0xdc, 0x00, 0x00, 0xdf, /* 0xd8-0xdf */
  0xe0, 0xe1, 0xe2, 0x00, 0xe4, 0x00, 0xe6, 0xe7, /* 0xe0-0xe7 */
  0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
  0x00, 0x00, 0xf2, 0xf3, 0xf4, 0x00, 0xf6, 0x00, /* 0xf0-0xf7 */
  0x00, 0xf9, 0xfa, 0xfb, 0xfc, 0x00, 0x00, 0xff, /* 0xf8-0xff */
  /* 0x0100 */
  0x00, 0x00, 0xc3, 0xe3, 0xa1, 0xa2, 0xc5, 0xe5, /* 0x00-0x07 */
  0x00, 0x00, 0x00, 0x00, 0xb2, 0xb9, 0x00, 0x00, /* 0x08-0x0f */
  0xd0, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
  0xdd, 0xfd, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
  0x00, 0xa3, 0xb3, 0xd1, 0xf1, 0x00, 0x00, 0x00, /* 0x40-0x47 */
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
  0xd5, 0xf5, 0xbc, 0xbd, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
  0x00, 0x00, 0xd7, 0xf7, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
  0xa6, 0xa8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
  0xd8, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
  0xbe, 0xac, 0xae, 0xaf, 0xbf, 0xb4, 0xb8, 0x00, /* 0x78-0x7f */
};
static const unsigned char iso8859_16_page02[8] = {
  0xaa, 0xba, 0xde, 0xfe, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
};
static const unsigned char iso8859_16_page20[8] = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0xb5, 0xa5, 0x00, /* 0x18-0x1f */
};

static int
iso8859_16_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
{
  unsigned char c = 0;
  if (wc < 0x00a0) {
    *r = wc;
    return 1;
  }
  else if (wc >= 0x00a0 && wc < 0x0180)
    c = iso8859_16_page00[wc-0x00a0];
  else if (wc >= 0x0218 && wc < 0x0220)
    c = iso8859_16_page02[wc-0x0218];
  else if (wc >= 0x2018 && wc < 0x2020)
    c = iso8859_16_page20[wc-0x2018];
  else if (wc == 0x20ac)
    c = 0xa4;
  if (c != 0) {
    *r = c;
    return 1;
  }
  return RET_ILUNI;
}