xt_stripe_util.h

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/*
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 * Maintainer: Jörg Behrens <behrens@dkrz.de>
 *             Moritz Hanke <hanke@dkrz.de>
 *             Thomas Jahns <jahns@dkrz.de>
 * URL: https://doc.redmine.dkrz.de/yaxt/html/
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#ifndef XT_STRIPE_UTIL_H
#define XT_STRIPE_UTIL_H

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "xt/xt_stripe.h"

#include "xt_arithmetic_util.h"

struct Xt_stripe_minmax {
  Xt_int min, max;
};

static inline struct Xt_stripe_minmax
xt_stripe2minmax(struct Xt_stripe stripe)
{
  Xt_int min = stripe.start, max = min;
  Xt_int stride = stripe.stride;
  int nstrides = stripe.nstrides;
  Xt_int mask = Xt_isign_mask(stride);
  stride = (Xt_int)((Xt_int)(nstrides - 1) * stride);
  min = (Xt_int)(min + (Xt_int)(mask & stride));
  max = (Xt_int)(max + (Xt_int)((Xt_int)~mask & stride));
  return (struct Xt_stripe_minmax){ .min = min, .max = max};
}


static inline int
xt_stripes_overlap(struct Xt_stripe a, struct Xt_stripe b) {
  struct Xt_stripe_minmax mma = xt_stripe2minmax(a),
    mmb = xt_stripe2minmax(b);
  return (mma.max >= mmb.min) & (mma.min <= mmb.max);
}



#endif

/*
 * Local Variables:
 * c-basic-offset: 2
 * coding: utf-8
 * indent-tabs-mode: nil
 * show-trailing-whitespace: t
 * require-trailing-newline: t
 * End:
 */