xref: /titanic_44/usr/src/head/macros.h (revision 1db2880b3a411e3c56e50c7dc42d3b137fcc4e48)
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 */
104