1 /* $NetBSD: util.h,v 1.2 2013/11/22 15:52:05 christos Exp $ */ 2 /*- 3 * Copyright (c) 1994 4 * The Regents of the University of California. All rights reserved. 5 * Copyright (c) 1994, 1995, 1996 6 * Keith Bostic. All rights reserved. 7 * 8 * See the LICENSE file for redistribution information. 9 * 10 * Id: util.h,v 10.5 1996/03/16 14:42:47 bostic Exp (Berkeley) Date: 1996/03/16 14:42:47 11 */ 12 13 /* Macros to init/set/clear/test flags. */ 14 #define FL_INIT(l, f) (l) = (f) /* Specific flags location. */ 15 #define FL_SET(l, f) ((l) |= (f)) 16 #define FL_CLR(l, f) ((l) &= ~(f)) 17 #define FL_ISSET(l, f) ((l) & (f)) 18 19 #define LF_INIT(f) FL_INIT(flags, f) /* Local variable flags. */ 20 #define LF_SET(f) FL_SET(flags, f) 21 #define LF_CLR(f) FL_CLR(flags, f) 22 #define LF_ISSET(f) FL_ISSET(flags, f) 23 24 #define F_INIT(p, f) FL_INIT((p)->flags, f) /* Structure element flags. */ 25 #define F_SET(p, f) FL_SET((p)->flags, f) 26 #define F_CLR(p, f) FL_CLR((p)->flags, f) 27 #define F_ISSET(p, f) FL_ISSET((p)->flags, f) 28 29 /* Offset to next column of stop size, e.g. tab offsets. */ 30 #define COL_OFF(c, stop) ((stop) - ((c) % (stop))) 31 32 /* Busy message types. */ 33 typedef enum { B_NONE, B_OFF, B_READ, B_RECOVER, B_SEARCH, B_WRITE } bmsg_t; 34 35 /* 36 * Number handling defines and protoypes. 37 * 38 * NNFITS: test for addition of two negative numbers under a limit 39 * NPFITS: test for addition of two positive numbers under a limit 40 * NADD_SLONG: test for addition of two signed longs 41 * NADD_USLONG: test for addition of two unsigned longs 42 */ 43 enum nresult { NUM_ERR, NUM_OK, NUM_OVER, NUM_UNDER }; 44 #define NNFITS(min, cur, add) \ 45 (((long)(min)) - (cur) <= (add)) 46 #define NPFITS(max, cur, add) \ 47 (((unsigned long)(max)) - (cur) >= (add)) 48 #define NADD_SLONG(sp, v1, v2) \ 49 ((v1) < 0 ? \ 50 ((v2) < 0 && \ 51 NNFITS(LONG_MIN, (v1), (v2))) ? NUM_UNDER : NUM_OK : \ 52 (v1) > 0 ? \ 53 (v2) > 0 && \ 54 NPFITS(LONG_MAX, (unsigned long)(v1), (unsigned long)(v2)) ? \ 55 NUM_OK : NUM_OVER : \ 56 NUM_OK) 57 #define NADD_USLONG(sp, v1, v2) \ 58 (NPFITS(ULONG_MAX, (v1), (v2)) ? NUM_OK : NUM_OVER) 59