60 lines
2.0 KiB
C
60 lines
2.0 KiB
C
/* $NetBSD: util.h,v 1.2 2009/01/18 03:43:45 lukem Exp $ */
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/*-
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* Copyright (c) 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*
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* Id: util.h,v 10.5 1996/03/16 14:42:47 bostic Exp (Berkeley) Date: 1996/03/16 14:42:47
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*/
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/* Macros to init/set/clear/test flags. */
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#define FL_INIT(l, f) (l) = (f) /* Specific flags location. */
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#define FL_SET(l, f) ((l) |= (f))
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#define FL_CLR(l, f) ((l) &= ~(f))
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#define FL_ISSET(l, f) ((l) & (f))
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#define LF_INIT(f) FL_INIT(flags, f) /* Local variable flags. */
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#define LF_SET(f) FL_SET(flags, f)
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#define LF_CLR(f) FL_CLR(flags, f)
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#define LF_ISSET(f) FL_ISSET(flags, f)
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#define F_INIT(p, f) FL_INIT((p)->flags, f) /* Structure element flags. */
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#define F_SET(p, f) FL_SET((p)->flags, f)
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#define F_CLR(p, f) FL_CLR((p)->flags, f)
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#define F_ISSET(p, f) FL_ISSET((p)->flags, f)
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/* Offset to next column of stop size, e.g. tab offsets. */
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#define COL_OFF(c, stop) ((stop) - ((c) % (stop)))
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/* Busy message types. */
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typedef enum { B_NONE, B_OFF, B_READ, B_RECOVER, B_SEARCH, B_WRITE } bmsg_t;
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/*
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* Number handling defines and protoypes.
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*
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* NNFITS: test for addition of two negative numbers under a limit
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* NPFITS: test for addition of two positive numbers under a limit
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* NADD_SLONG: test for addition of two signed longs
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* NADD_USLONG: test for addition of two unsigned longs
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*/
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enum nresult { NUM_ERR, NUM_OK, NUM_OVER, NUM_UNDER };
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#define NNFITS(min, cur, add) \
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(((long)(min)) - (cur) <= (add))
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#define NPFITS(max, cur, add) \
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(((unsigned long)(max)) - (cur) >= (add))
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#define NADD_SLONG(sp, v1, v2) \
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((v1) < 0 ? \
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((v2) < 0 && \
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NNFITS(LONG_MIN, (v1), (v2))) ? NUM_UNDER : NUM_OK : \
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(v1) > 0 ? \
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(v2) > 0 && \
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NPFITS(LONG_MAX, (unsigned long)(v1), (unsigned long)(v2)) ? \
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NUM_OK : NUM_OVER : \
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NUM_OK)
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#define NADD_USLONG(sp, v1, v2) \
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(NPFITS(ULONG_MAX, (v1), (v2)) ? NUM_OK : NUM_OVER)
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