39 lines
2.1 KiB
C
39 lines
2.1 KiB
C
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/*************************************************************************/
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/* */
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/* Copyright (c) 1994 Stanford University */
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/* */
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/* All rights reserved. */
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/* */
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/* Permission is given to use, copy, and modify this software for any */
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/* non-commercial purpose as long as this copyright notice is not */
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/* removed. All other uses, including redistribution in whole or in */
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/* part, are forbidden without prior written permission. */
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/* */
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/* This software is provided with absolutely no warranty and no */
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/* support. */
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/* */
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/*************************************************************************/
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/*************************************************************************
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* *
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* macros.h: general C macros *
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* *
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*************************************************************************/
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#define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
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#define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
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#define ABS(X) ((X) > 0 ? (X) : -(X))
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#define SIGN(X) ((X) > 0 ? 1 : -1)
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#define NINT(X) (long)((X)+0.5) /* flt X>=0*/
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#define ROUNDDOWN(X) (long)(X) /* flt X>=0*/
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#define ROUNDUP(X) ((X) == (long)(X) ? (long)(X) : (long)(X)+1) /* flt X>=0*/
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#define STEPDOWN(X) ((X) == (long)(X) ? (long)(X)-1 : (long)(X)) /* flt X>=0*/
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#define STEPUP(X) ((long)(X)+1) /* flt X>=0*/
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#define NLONG(X) (long)((X)+0.5) /* flt X>=0*/
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#define HALF(X) ((X)>>1) /* int X>=0*/
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#define FRACT(X) ((X)-(long)(X)) /* flt X>=0*/
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