1  /*
       2   * Copyright © 2006 Keith Packard
       3   * Copyright © 2010 Behdad Esfahbod
       4   *
       5   * Permission to use, copy, modify, distribute, and sell this software and its
       6   * documentation for any purpose is hereby granted without fee, provided that
       7   * the above copyright notice appear in all copies and that both that
       8   * copyright notice and this permission notice appear in supporting
       9   * documentation, and that the name of the author(s) not be used in
      10   * advertising or publicity pertaining to distribution of the software without
      11   * specific, written prior permission.  The authors make no
      12   * representations about the suitability of this software for any purpose.  It
      13   * is provided "as is" without express or implied warranty.
      14   *
      15   * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
      16   * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
      17   * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
      18   * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
      19   * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
      20   * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
      21   * PERFORMANCE OF THIS SOFTWARE.
      22   */
      23  #ifndef _FCARCH_H_
      24  #define _FCARCH_H_
      25  
      26  #ifdef HAVE_CONFIG_H
      27  #include <config.h>
      28  #endif
      29  
      30  /*
      31   * Each unique machine architecture needs an entry in this file
      32   * So far the differences boil down to: endianness, 32 vs 64 bit pointers,
      33   * and on 32bit ones, whether double is aligned to one word or two words.
      34   * Those result in the 6 formats listed below.
      35   *
      36   * If any of the assertion errors in fcarch.c fail, you need to add a new
      37   * architecture.  Contact the fontconfig mailing list in that case.
      38   *
      39   * name		endianness	pointer-size	double-alignment
      40   *
      41   * le32d4	4321		4		4
      42   * le32d8	4321		4		8
      43   * le64		4321		8		8
      44   * be32d4	1234		4		4
      45   * be32d8	1234		4		8
      46   * be64		1234		8		8
      47   */
      48  
      49  #if defined(__DARWIN_BYTE_ORDER) && __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
      50  # define FC_ARCH_ENDIAN "le"
      51  #elif defined(__DARWIN_BYTE_ORDER) && __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
      52  # define FC_ARCH_ENDIAN "be"
      53  #elif defined(__DARWIN_BYTE_ORDER) && __DARWIN_BYTE_ORDER == __DARWIN_PDP_ENDIAN
      54  # define FC_ARCH_ENDIAN "pe"
      55  #elif defined(WORDS_BIGENDIAN) && WORDS_BIGENDIAN
      56  # define FC_ARCH_ENDIAN "be"
      57  #else
      58  # define FC_ARCH_ENDIAN "le"
      59  #endif
      60  
      61  #if SIZEOF_VOID_P == 4
      62  # if ALIGNOF_DOUBLE == 4
      63  #  define FC_ARCH_SIZE_ALIGN "32d4"
      64  # else /* ALIGNOF_DOUBLE != 4 */
      65  #  define FC_ARCH_SIZE_ALIGN "32d8"
      66  # endif
      67  #else /* SIZEOF_VOID_P != 4 */
      68  # define FC_ARCH_SIZE_ALIGN "64"
      69  #endif
      70  
      71  /* config.h might override this */
      72  #ifndef FC_ARCHITECTURE
      73  # define FC_ARCHITECTURE FC_ARCH_ENDIAN FC_ARCH_SIZE_ALIGN
      74  #endif
      75  
      76  #endif /* _FCARCH_H_ */