/* $OpenBSD: util.h,v 1.4 2006/01/08 21:10:04 miod Exp $ */ /*- * Copyright (c) 1994 * The Regents of the University of California. All rights reserved. * Copyright (c) 1994, 1995, 1996 * Keith Bostic. All rights reserved. * * See the LICENSE file for redistribution information. * * @(#)util.h 10.5 (Berkeley) 3/16/96 */ /* Macros to init/set/clear/test flags. */ #define FL_INIT(l, f) (l) = (f) /* Specific flags location. */ #define FL_SET(l, f) ((l) |= (f)) #define FL_CLR(l, f) ((l) &= ~(f)) #define FL_ISSET(l, f) ((l) & (f)) #define LF_INIT(f) FL_INIT(flags, (f)) /* Local variable flags. */ #define LF_SET(f) FL_SET(flags, (f)) #define LF_CLR(f) FL_CLR(flags, (f)) #define LF_ISSET(f) FL_ISSET(flags, (f)) #define F_INIT(p, f) FL_INIT((p)->flags, (f)) /* Structure element flags. */ #define F_SET(p, f) FL_SET((p)->flags, (f)) #define F_CLR(p, f) FL_CLR((p)->flags, (f)) #define F_ISSET(p, f) FL_ISSET((p)->flags, (f)) /* Offset to next column of stop size, e.g. tab offsets. */ #define COL_OFF(c, stop) ((stop) - ((c) % (stop))) /* Busy message types. */ typedef enum { B_NONE, B_OFF, B_READ, B_RECOVER, B_SEARCH, B_WRITE } bmsg_t; /* * Number handling defines and protoypes. * * NNFITS: test for addition of two negative numbers under a limit * NPFITS: test for addition of two positive numbers under a limit * NADD_SLONG: test for addition of two signed longs * NADD_USLONG: test for addition of two unsigned longs */ enum nresult { NUM_ERR, NUM_OK, NUM_OVER, NUM_UNDER }; #define NNFITS(min, cur, add) \ (((long)(min)) - (cur) <= (add)) #define NPFITS(max, cur, add) \ (((unsigned long)(max)) - (cur) >= (add)) #define NADD_SLONG(v1, v2) \ ((v1) < 0 ? \ ((v2) < 0 && \ NNFITS(LONG_MIN, (v1), (v2))) ? NUM_UNDER : NUM_OK : \ (v1) > 0 ? \ (v2) > 0 && \ NPFITS(LONG_MAX, (v1), (v2)) ? NUM_OK : NUM_OVER : \ NUM_OK)