94 lines
2.4 KiB
C
Executable File
94 lines
2.4 KiB
C
Executable File
/* Copyright (c) 1988 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ifndef _MACROS_H
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#define _MACROS_H
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#pragma ident "@(#)macros.h 1.8 93/11/01 SMI" /* SVr4.0 1.3.1.7 */
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* numeric() is useful in while's, if's, etc., but don't use *p++
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* max() and min() depend on the types of the operands
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* abs() is absolute value
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*/
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#define numeric(c) ((c) >= '0' && (c) <= '9')
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#define max(a, b) ((a) < (b) ? (b) : (a))
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#define min(a, b) ((a) > (b) ? (b) : (a))
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#define abs(x) ((x) >= 0 ? (x) : -(x))
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#define compare(str1, str2) strcmp((str1), (str2))
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#define equal(str1, str2) (strcmp((str1), (str2)) == 0)
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#define length(str) strlen(str)
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#define size(str) (strlen(str) + 1)
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/*
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* The global variable Statbuf is available for use as a stat(II)
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* structure. Note that "stat.h" is included here and should
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* not be included elsewhere.
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* Exists(file) returns 0 if the file does not exist;
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* the flags word if it does (the flags word is always non-zero).
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*/
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extern struct stat Statbuf;
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#define exists(file) (stat(file, &Statbuf) < 0 ? 0 : Statbuf.st_mode)
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/*
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* SAVE() and RSTR() use local data in nested blocks.
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* Make sure that they nest cleanly.
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*/
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#define SAVE(name, place) { int place = name;
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#define RSTR(name, place) name = place; }
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/*
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* Use: DEBUG(sum,d) which becomes fprintf(stderr,"sum = %d\n",sum)
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*
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* Note: Sccsid[] strings are still supported but not the prefered
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* method of labeling files. Use #ident.
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*/
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#ifdef __STDC__
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#define DEBUG(var, type) fprintf(stderr, #var "= %" #type "\n", var)
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#define SCCSID(arg) static char Sccsid[] = #arg
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#else
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#define DEBUG(var, type) fprintf(stderr, "var = %type\n", var)
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#define SCCSID(arg) static char Sccsid[] = "arg"
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#endif
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/*
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* Use of ERRABORT() will cause libS.a internal
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* errors to cause aborts
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*/
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#define ERRABORT() _error() { abort(); }
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/*
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* Use of USXALLOC() is required to force all calls to alloc()
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* (e.g., from libS.a) to call xalloc().
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*/
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#define NONBLANK(p) while (*(p) == ' ' || *(p) == '\t') (p)++
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/*
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* A global null string.
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*/
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extern char Null[1];
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/*
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* A global error message string.
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*/
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extern char Error[128];
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#ifdef __cplusplus
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}
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#endif
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#endif /* _MACROS_H */
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