external/bsd/openldap/dist/include/ac/bytes.h

   1 /* Generic bytes.h */
   2 /* $OpenLDAP: pkg/ldap/include/ac/bytes.h,v 1.20.2.3 2008/02/11 23:26:40 kurt Exp $ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2008 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 #ifndef _AC_BYTES_H
  18 #define _AC_BYTES_H
  19
  20 /* cross compilers should define both AC_INT{2,4}_TYPE in CPPFLAGS */
  21
  22 #if !defined( AC_INT4_TYPE )
  23         /* use autoconf defines to provide sized typedefs */
  24 #       if SIZEOF_LONG == 4
  25 #               define AC_INT4_TYPE long
  26 #       elif SIZEOF_INT == 4
  27 #               define AC_INT4_TYPE int
  28 #       elif SIZEOF_SHORT == 4
  29 #               define AC_INT4_TYPE short
  30 #       else
  31 #       error "AC_INT4_TYPE?"
  32 #       endif
  33 #endif
  34
  35 typedef AC_INT4_TYPE ac_int4;
  36 typedef signed AC_INT4_TYPE ac_sint4;
  37 typedef unsigned AC_INT4_TYPE ac_uint4;
  38
  39 #if !defined( AC_INT2_TYPE )
  40 #       if SIZEOF_SHORT == 2
  41 #               define AC_INT2_TYPE short
  42 #       elif SIZEOF_INT == 2
  43 #               define AC_INT2_TYPE int
  44 #       elif SIZEOF_LONG == 2
  45 #               define AC_INT2_TYPE long
  46 #       else
  47 #       error "AC_INT2_TYPE?"
  48 #       endif
  49 #endif
  50
  51 #if defined( AC_INT2_TYPE )
  52 typedef AC_INT2_TYPE ac_int2;
  53 typedef signed AC_INT2_TYPE ac_sint2;
  54 typedef unsigned AC_INT2_TYPE ac_uint2;
  55 #endif
  56
  57 #ifndef BYTE_ORDER
  58 /* cross compilers should define BYTE_ORDER in CPPFLAGS */
  59
  60 /*
  61  * Definitions for byte order, according to byte significance from low
  62  * address to high.
  63  */
  64 #define LITTLE_ENDIAN   1234    /* LSB first: i386, vax */
  65 #define BIG_ENDIAN  4321        /* MSB first: 68000, ibm, net */
  66 #define PDP_ENDIAN  3412        /* LSB first in word, MSW first in long */
  67
  68 /* assume autoconf's AC_C_BIGENDIAN has been ran */
  69 /* if it hasn't, we assume (maybe falsely) the order is LITTLE ENDIAN */
  70 #       ifdef WORDS_BIGENDIAN
  71 #               define BYTE_ORDER  BIG_ENDIAN
  72 #       else
  73 #               define BYTE_ORDER  LITTLE_ENDIAN
  74 #       endif
  75
  76 #endif /* BYTE_ORDER */
  77
  78 #endif /* _AC_BYTES_H */