Return to ucs4swapped.h CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / libiconv / lib

libiconv

    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-4-SWAPPED = UCS-4-INTERNAL with inverted endianness
   23:  */
   24: 
   25: static int
   26: ucs4swapped_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
   27: {
   28:   /* This function assumes that 'unsigned int' has exactly 32 bits. */
   29:   if (sizeof(unsigned int) != 4) abort();
   30: 
   31:   if (n >= 4) {
   32:     unsigned int x = *(const unsigned int *)s;
   33:     x = (x >> 24) | ((x >> 8) & 0xff00) | ((x & 0xff00) << 8) | (x << 24);
   34:     *pwc = x;
   35:     return 4;
   36:   }
   37:   return RET_TOOFEW(0);
   38: }
   39: 
   40: static int
   41: ucs4swapped_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
   42: {
   43:   /* This function assumes that 'unsigned int' has exactly 32 bits. */
   44:   if (sizeof(unsigned int) != 4) abort();
   45: 
   46:   if (n >= 4) {
   47:     unsigned int x = wc;
   48:     x = (x >> 24) | ((x >> 8) & 0xff00) | ((x & 0xff00) << 8) | (x << 24);
   49:     *(unsigned int *)r = x;
   50:     return 4;
   51:   } else
   52:     return RET_TOOSMALL;
   53: }