uspace/lib/c/include/macros.h

   1 /*
   2  * Copyright (c) 2009 Martin Decky
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup libc
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 #ifndef _LIBC_MACROS_H_
  36 #define _LIBC_MACROS_H_
  37
  38 #define min(a, b)  ((a) < (b) ? (a) : (b))
  39 #define max(a, b)  ((a) > (b) ? (a) : (b))
  40 #define mabs(a)    ((a) >= 0 ? (a) : -(a))
  41
  42 #define ARRAY_SIZE(array)   (sizeof(array) / sizeof(array[0]))
  43
  44 #define KiB2SIZE(kb)  ((kb) << 10)
  45 #define MiB2SIZE(mb)  ((mb) << 20)
  46
  47 #define STRING(arg)      STRING_ARG(arg)
  48 #define STRING_ARG(arg)  #arg
  49
  50 #define LOWER32(arg)  (((uint64_t) (arg)) & 0xffffffff)
  51 #define UPPER32(arg)  (((((uint64_t) arg)) >> 32) & 0xffffffff)
  52
  53 #define MERGE_LOUP32(lo, up) \
  54         ((((uint64_t) (lo)) & 0xffffffff) \
  55             | ((((uint64_t) (up)) & 0xffffffff) << 32))
  56
  57 #define _paddname(line)     PADD_ ## line ## __
  58 #define _padd(width, line, n)  uint ## width ## _t _paddname(line) [n]
  59
  60 #define PADD32(n)  _padd(32, __LINE__, n)
  61 #define PADD16(n)  _padd(16, __LINE__, n)
  62 #define PADD8(n)   _padd(8, __LINE__, n)
  63
  64 #endif
  65
  66 /** @}
  67  */