macros.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#ifndef _MACROS_H
#define _MACROS_H
#pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.3.1.7 */
#include <sys/types.h>
#include <sys/stat.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* numeric() is useful in while's, if's, etc., but don't use *p++
* max() and min() depend on the types of the operands
* abs() is absolute value
*/
#define numeric(c) ((c) >= '0' && (c) <= '9')
#define max(a, b) ((a) < (b) ? (b) : (a))
#define min(a, b) ((a) > (b) ? (b) : (a))
#define abs(x) ((x) >= 0 ? (x) : -(x))
#define compare(str1, str2) strcmp((str1), (str2))
#define equal(str1, str2) (strcmp((str1), (str2)) == 0)
#define length(str) strlen(str)
#define size(str) (strlen(str) + 1)
/*
* The global variable Statbuf is available for use as a stat(II)
* structure. Note that "stat.h" is included here and should
* not be included elsewhere.
* Exists(file) returns 0 if the file does not exist;
* the flags word if it does (the flags word is always non-zero).
*/
extern struct stat Statbuf;
#define exists(file) (stat(file, &Statbuf) < 0 ? 0 : Statbuf.st_mode)
/*
* SAVE() and RSTR() use local data in nested blocks.
* Make sure that they nest cleanly.
*/
#define SAVE(name, place) { int place = name;
#define RSTR(name, place) name = place; }
/*
* Use: DEBUG(sum,d) which becomes fprintf(stderr,"sum = %d\n",sum)
*
* Note: Sccsid[] strings are still supported but not the prefered
* method of labeling files. Use #ident.
*/
#ifdef __STDC__
#define DEBUG(var, type) fprintf(stderr, #var "= %" #type "\n", var)
#define SCCSID(arg) static char Sccsid[] = #arg
#else
#define DEBUG(var, type) fprintf(stderr, "var = %type\n", var)
#define SCCSID(arg) static char Sccsid[] = "arg"
#endif
/*
* Use of ERRABORT() will cause libS.a internal
* errors to cause aborts
*/
#define ERRABORT() _error() { abort(); }
/*
* Use of USXALLOC() is required to force all calls to alloc()
* (e.g., from libS.a) to call xalloc().
*/
#define NONBLANK(p) while (*(p) == ' ' || *(p) == '\t') (p)++
/*
* A global null string.
*/
extern char Null[1];
/*
* A global error message string.
*/
extern char Error[128];
#ifdef __cplusplus
}
#endif
#endif /* _MACROS_H */