release/src/router/libiconv/lib/ucs4be.h

   1 /*
   2  * Copyright (C) 1999-2000 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 Library General Public
   7  * License as published by the Free Software Foundation; either version 2
   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  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
  17  * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
  18  * Fifth Floor, Boston, MA 02110-1301, USA.
  19  */
  20
  21 /*
  22  * UCS-4BE = UCS-4 big endian
  23  */
  24
  25 static int
  26 ucs4be_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
  27 {
  28   if (n >= 4) {
  29     *pwc = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3];
  30     return 4;
  31   }
  32   return RET_TOOFEW(0);
  33 }
  34
  35 static int
  36 ucs4be_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
  37 {
  38   if (n >= 4) {
  39     r[0] = (unsigned char) (wc >> 24);
  40     r[1] = (unsigned char) (wc >> 16);
  41     r[2] = (unsigned char) (wc >> 8);
  42     r[3] = (unsigned char) wc;
  43     return 4;
  44   } else
  45     return RET_TOOSMALL;
  46 }