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#ifndef MINC_USEFUL_HEADER_FILE
#define MINC_USEFUL_HEADER_FILE
/* ----------------------------- MNI Header -----------------------------------
@NAME : minc_useful.h
@INPUT :
@OUTPUT :
@RETURNS :
@DESCRIPTION: A set of macros and definitions useful for MINC routines.
(derived from mni_def.h)
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : July 15, 1991 David MacDonald
@MODIFIED :
* $Log: minc_useful.h,v $
* Revision 6.2 2004-10-15 13:47:55 bert
* Minor changes for Windows compatibility
*
* Revision 6.1 1999/10/19 14:45:10 neelin
* Fixed Log subsitutions for CVS
*
* Revision 6.0 1997/09/12 13:24:54 neelin
* Release of minc version 0.6
*
* Revision 5.0 1997/08/21 13:25:53 neelin
* Release of minc version 0.5
*
* Revision 4.0 1997/05/07 20:07:52 neelin
* Release of minc version 0.4
*
* Revision 3.1 1997/04/10 19:22:18 neelin
* Removed redefinition of NULL and added pointer casts in appropriate places.
*
* Revision 3.0 1995/05/15 19:33:12 neelin
* Release of minc version 0.3
*
* Revision 2.0 1994/09/28 10:38:10 neelin
* Release of minc version 0.2
*
* Revision 1.7 94/09/28 10:37:31 neelin
* Pre-release
*
* Revision 1.6 93/08/11 12:06:44 neelin
* Added RCS logging in source.
*
July 29, 1992 Peter Neelin
- changed name for MINC routines and added some macros
@COPYRIGHT :
Copyright 1993 David MacDonald and Peter Neelin,
McConnell Brain Imaging Centre,
Montreal Neurological Institute, McGill University.
Permission to use, copy, modify, and distribute this
software and its documentation for any purpose and without
fee is hereby granted, provided that the above copyright
notice appear in all copies. The authors and McGill University
make no representations about the suitability of this
software for any purpose. It is provided "as is" without
express or implied warranty.
@RCSID : $Header: /private-cvsroot/minc/libsrc/minc_useful.h,v 6.2 2004-10-15 13:47:55 bert Exp $ MINC (MNI)
---------------------------------------------------------------------------- */
/* ------------ define signed for vaxes ----------------- */
#if (defined(vax) && !defined(__STDC__))
#define signed
#endif
/* --------- define the prefixes to all functions ---------- */
#ifndef MNCAPI
# define MNCAPI
#endif
#define PRIVATE static
#define SEMIPRIVATE
/* --------- define TRUE and FALSE ------------------------ */
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
/* --------- macro to determine the size of a static array,
e.g., int array[] = { 1, 3, 9, 5 }; ------------ */
#define SIZEOF_STATIC_ARRAY( array ) \
( sizeof(array) / sizeof((array)[0]))
/* --------- interpolate between a and b ------------------- */
#define INTERPOLATE( alpha, a, b ) ((a) + (alpha) * ((b) - (a)))
/* --------- PI, and angles -------------------------------- */
#define PI M_PI /* from math.h */
#define DEG_TO_RAD (PI / 180.0)
#define RAD_TO_DEG (180.0 / PI)
/* --------- Absolute value, min, and max. Bear in mind that these
may evaluate an expression multiple times, i.e., ABS( x - y ),
and therefore may be inefficient, or incorrect,
i.e, ABS( ++x ); ------------------ */
#define ABS( x ) ( ((x) > (0)) ? (x) : (-(x)) )
/* ---------- Round to nearest integer - must be cast to integer in order
for rounding to take effect, and the cast must truncate
towards zero - eg. i = (int) ROUND(x);
Same caveats as ABS ------------------ */
#define ROUND( x ) ((x) + ( ((x) >= 0) ? 0.5 : (-0.5) ) )
#undef MAX
#define MAX( x, y ) ( ((x) >= (y)) ? (x) : (y) )
#define MAX3( x, y, z ) MAX( x, MAX(y,z) )
#undef MIN
#define MIN( x, y ) ( ((x) <= (y)) ? (x) : (y) )
#define MIN3( x, y, z ) MIN( x, MIN(y,z) )
/* --------- gets the address of a 2-d array element in a 1-d array ----- */
#define IJ( i, j, nj ) ( (i) * (nj) + (j) )
/* --------- gets the address of a 3-d array element in a 1-d array ----- */
#define IJK( i, j, k, nj, nk ) ( (k) + (nk) * ((j) + (nj) * (i)) )
/* --------- memory allocation macros -------------------------- */
#define MALLOC( n_items, type ) \
( (type *) malloc( (size_t) (n_items) * sizeof(type) ) )
#define CALLOC( n_items, type ) \
( (type *) calloc( (size_t) (n_items), sizeof(type) ) )
#define REALLOC( ptr, n_items, type ) \
( (type *) realloc( (void *) ptr, (size_t) (n_items) * sizeof(type) ) )
#define FREE( ptr ) \
free( (void *) ptr )
/* --------- environment variables -------------------------- */
#ifdef sun
char *getenv(); /* on suns, this declaration is not in stdlib.h */
#endif
#define ENV_EXISTS( env ) ( getenv(env) != (char *) 0 )
/* --------- string macros -------------------------- */
#define STRINGS_EQUAL(str1,str2) (strcmp(str1,str2)==0)
#endif
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