include/c.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Standard C macros
  25  *
  26  **********************************************************************
  27  * HISTORY
  28  * 02-Feb-86  Glenn Marcy (gm0w) at Carnegie-Mellon University
  29  *      Added check to allow multiple or recursive inclusion of this
  30  *      file.  Added bool enum from machine/types.h for regular users
  31  *      that want a real boolean type.
  32  *
  33  * 29-Dec-85  Glenn Marcy (gm0w) at Carnegie-Mellon University
  34  *      Also change spacing of MAX and MIN to coincide with that of
  35  *      sys/param.h.
  36  *
  37  * 19-Nov-85  Glenn Marcy (gm0w) at Carnegie-Mellon University
  38  *      Changed the number of tabs between TRUE, FALSE and their
  39  *      respective values to match those in sys/types.h.
  40  *
  41  * 17-Dec-84  Glenn Marcy (gm0w) at Carnegie-Mellon University
  42  *      Only define TRUE and FALSE if not defined.  Added caseE macro
  43  *      for using enumerated types in switch statements.
  44  *
  45  * 23-Apr-81  Mike Accetta (mja) at Carnegie-Mellon University
  46  *      Added "sizeofS" and "sizeofA" macros which expand to the size
  47  *      of a string constant and array respectively.
  48  *
  49  **********************************************************************
  50  */
  51
  52 #ifndef _C_INCLUDE_
  53 #define _C_INCLUDE_
  54
  55 #ifndef ABS
  56 #define ABS(x) ((x)>=0?(x):-(x))
  57 #endif /* ABS */
  58 #ifndef MIN
  59 #define MIN(a,b) (((a)<(b))?(a):(b))
  60 #endif /* MIN */
  61 #ifndef MAX
  62 #define MAX(a,b) (((a)>(b))?(a):(b))
  63 #endif /* MAX */
  64
  65 #ifndef FALSE
  66 #define FALSE   0
  67 #endif  /* FALSE */
  68 #ifndef TRUE
  69 #define TRUE    1
  70 #endif  /* TRUE */
  71
  72 #define CERROR          (-1)
  73
  74 #ifndef bool
  75 typedef enum    { false = 0, true = 1 } bool;
  76 #endif  /* bool */
  77
  78 #define sizeofS(string) (sizeof(string) - 1)
  79 #define sizeofA(array)  (sizeof(array)/sizeof(array[0]))
  80
  81 #define caseE(enum_type)        case (int)(enum_type)
  82
  83 #endif  /* _C_INCLUDE_ */