newlib/libc/iconv/lib/endian.h

   1 /*
   2  * Copyright (c) 2003-2004, Artem B. Bityuckiy
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  */
  25 #ifndef __ICONV_CES_ENDIAN_H__
  26 #define __ICONV_CES_ENDIAN_H__
  27
  28 #include <sys/param.h>
  29
  30 #if (BYTE_ORDER == LITTLE_ENDIAN)
  31
  32 #  define ICONV_BETOHS(s) \
  33      ((((s) << 8) & 0xFF00) | (((s) >> 8) & 0x00FF))
  34
  35 #  define ICONV_BETOHL(l) \
  36      ((((l) << 24) & 0xFF000000) | \
  37       (((l) <<  8) & 0x00FF0000) | \
  38       (((l) >>  8) & 0x0000FF00) | \
  39       (((l) >> 24) & 0x000000FF))
  40
  41 #  define ICONV_LETOHS(s) (s)
  42 #  define ICONV_LETOHL(l) (l)
  43
  44 #  define ICONV_HTOLES(s) ICONV_LETOHS (s)
  45 #  define ICONV_HTOLEL(l) ICONV_LETOHL (l)
  46 #  define ICONV_HTOBES(s) ICONV_BETOHS (s)
  47 #  define ICONV_HTOBEL(l) ICONV_BETOHL (l)
  48
  49 #elif (BYTE_ORDER == BIG_ENDIAN)
  50
  51 #  define ICONV_BETOHS(s) (s)
  52 #  define ICONV_BETOHL(l) (l)
  53
  54 #  define ICONV_LETOHS(s) \
  55      ((((s) << 8) & 0xFF00) | (((s) >> 8) & 0x00FF))
  56
  57 #  define ICONV_LETOHL(l) \
  58      ((((l) << 24) & 0xFF000000) | \
  59       (((l) <<  8) & 0x00FF0000) | \
  60       (((l) >>  8) & 0x0000FF00) | \
  61       (((l) >> 24) & 0x000000FF))
  62
  63 #  define ICONV_HTOBES(s) ICONV_BETOHS (s)
  64 #  define ICONV_HTOBEL(l) ICONV_BETOHL (l)
  65 #  define ICONV_HTOLES(s) ICONV_LETOHS (s)
  66 #  define ICONV_HTOLEL(l) ICONV_LETOHL (l)
  67
  68 #else
  69 #  error "Unknown byte order."
  70 #endif
  71
  72 #endif /* !__ICONV_CES_ENDIAN_H__ */
  73