cp858.h

libiconv是一个很不错的字符集转换库。程序接口也很简单

/*
 * Copyright (C) 1999-2002 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 Library General Public
 * License as published by the Free Software Foundation; either version 2
 * 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
 * If not, write to the Free Software Foundation, Inc., 59 Temple Place -
 * Suite 330, Boston, MA 02111-1307, USA.
 */

/*
 * CP858
 */

static int
cp858_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
{
  unsigned char c = *s;
  if (c < 0x80)
    *pwc = (ucs4_t) c;
  else if (c == 0xd5)
    *pwc = 0x20ac;
  else
    *pwc = (ucs4_t) cp850_2uni[c-0x80];
  return 1;
}

static int
cp858_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
{
  unsigned char c = 0;
  if (wc < 0x0080) {
    *r = wc;
    return 1;
  }
  else if (wc >= 0x00a0 && wc < 0x0100)
    c = cp850_page00[wc-0x00a0];
  else if (wc == 0x0192)
    c = 0x9f;
  else if (wc == 0x2017)
    c = 0xf2;
  else if (wc == 0x20ac)
    c = 0xd5;
  else if (wc >= 0x2500 && wc < 0x25a8)
    c = cp850_page25[wc-0x2500];
  if (c != 0) {
    *r = c;
    return 1;
  }
  return RET_ILUNI;
}