usr/src/head/macros.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*      Copyright (c) 1988 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 #ifndef _MACROS_H
  27 #define _MACROS_H
  28
  29 #pragma ident   "%Z%%M% %I%     %E% SMI"        /* SVr4.0 1.3.1.7 */
  30
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33
  34 #ifdef  __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 /*
  39  *      numeric() is useful in while's, if's, etc., but don't use *p++
  40  *      max() and min() depend on the types of the operands
  41  *      abs() is absolute value
  42  */
  43 #define numeric(c)              ((c) >= '0' && (c) <= '9')
  44 #define max(a, b)               ((a) < (b) ? (b) : (a))
  45 #define min(a, b)               ((a) > (b) ? (b) : (a))
  46 #define abs(x)                  ((x) >= 0 ? (x) : -(x))
  47
  48 #define compare(str1, str2)     strcmp((str1), (str2))
  49 #define equal(str1, str2)       (strcmp((str1), (str2)) == 0)
  50 #define length(str)             strlen(str)
  51 #define size(str)               (strlen(str) + 1)
  52
  53 /*
  54  *      The global variable Statbuf is available for use as a stat(II)
  55  *      structure.  Note that "stat.h" is included here and should
  56  *      not be included elsewhere.
  57  *      Exists(file) returns 0 if the file does not exist;
  58  *      the flags word if it does (the flags word is always non-zero).
  59  */
  60
  61 extern struct stat Statbuf;
  62 #define exists(file)            (stat(file, &Statbuf) < 0 ? 0 : Statbuf.st_mode)
  63
  64 /*
  65  *      SAVE() and RSTR() use local data in nested blocks.
  66  *      Make sure that they nest cleanly.
  67  */
  68 #define SAVE(name, place)       { int place = name;
  69 #define RSTR(name, place)       name = place; }
  70
  71 /*
  72  *      Use: DEBUG(sum,d) which becomes fprintf(stderr,"sum = %d\n",sum)
  73  *
  74  *      Note:   Sccsid[] strings are still supported but not the prefered
  75  *              method of labeling files.  Use #ident.
  76  */
  77 #ifdef  __STDC__
  78 #define DEBUG(var, type)        fprintf(stderr, #var "= %" #type "\n", var)
  79 #define SCCSID(arg)             static char Sccsid[] = #arg
  80 #else
  81 #define DEBUG(var, type)        fprintf(stderr, "var = %type\n", var)
  82 #define SCCSID(arg)             static char Sccsid[] = "arg"
  83 #endif
  84
  85 /*
  86  *      Use of ERRABORT() will cause libS.a internal
  87  *      errors to cause aborts
  88  */
  89 #define ERRABORT()      _error() { abort(); }
  90
  91 /*
  92  *      Use of USXALLOC() is required to force all calls to alloc()
  93  *      (e.g., from libS.a) to call xalloc().
  94  */
  95 #define NONBLANK(p)     while (*(p) == ' ' || *(p) == '\t') (p)++
  96
  97 /*
  98  *      A global null string.
  99  */
 100 extern char     Null[1];
 101
 102 /*
 103  *      A global error message string.
 104  */
 105 extern char     Error[128];
 106
 107 #ifdef  __cplusplus
 108 }
 109 #endif
 110
 111 #endif  /* _MACROS_H */