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 /*
  23  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
  24  */
  25 /*      Copyright (c) 1988 AT&T     */
  26 /*        All Rights Reserved   */
  27 
  28 
  29 #ifndef _MACROS_H
  30 #define _MACROS_H
  31 
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38 
  39 /*
  40  *      numeric() is useful in while's, if's, etc., but don't use *p++
  41  *      max() and min() depend on the types of the operands
  42  *      abs() is absolute value
  43  */
  44 #define numeric(c)              ((c) >= '0' && (c) <= '9')
  45 #define max(a, b)               ((a) < (b) ? (b) : (a))
  46 #define min(a, b)               ((a) > (b) ? (b) : (a))
  47 #define abs(x)                  ((x) >= 0 ? (x) : -(x))
  48 
  49 #define compare(str1, str2)     strcmp((str1), (str2))
  50 #define equal(str1, str2)       (strcmp((str1), (str2)) == 0)
  51 #define length(str)             strlen(str)
  52 #define size(str)               (strlen(str) + 1)
  53 
  54 /*
  55  *      The global variable Statbuf is available for use as a stat(II)
  56  *      structure.  Note that "stat.h" is included here and should
  57  *      not be included elsewhere.
  58  *      Exists(file) returns 0 if the file does not exist;
  59  *      the flags word if it does (the flags word is always non-zero).
  60  */
  61 
  62 extern struct stat Statbuf;
  63 #define exists(file)            (stat(file, &Statbuf) < 0 ? 0 : Statbuf.st_mode)
  64 
  65 /*
  66  *      SAVE() and RSTR() use local data in nested blocks.
  67  *      Make sure that they nest cleanly.
  68  */
  69 #define SAVE(name, place)       { int place = name;
  70 #define RSTR(name, place)       name = place; }
  71 
  72 /*
  73  *      Use: DEBUG(sum,d) which becomes fprintf(stderr,"sum = %d\n",sum)
  74  */
  75 #define DEBUG(var, type)        fprintf(stderr, #var "= %" #type "\n", var)
  76 
  77 /*
  78  *      Use of ERRABORT() will cause libS.a internal
  79  *      errors to cause aborts
  80  */
  81 #define ERRABORT()      _error() { abort(); }
  82 
  83 /*
  84  *      Use of USXALLOC() is required to force all calls to alloc()
  85  *      (e.g., from libS.a) to call xalloc().
  86  */
  87 #define NONBLANK(p)     while (*(p) == ' ' || *(p) == '\t') (p)++
  88 
  89 /*
  90  *      A global null string.
  91  */
  92 extern char     Null[1];
  93 
  94 /*
  95  *      A global error message string.
  96  */
  97 extern char     Error[128];
  98 
  99 #ifdef  __cplusplus
 100 }
 101 #endif
 102 
 103 #endif  /* _MACROS_H */