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The NetCDF-Java Library is a Java interface to NetCDF files, as well as to many other types of scientific data formats.
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/*
 * Copyright 1998-2014 University Corporation for Atmospheric Research/Unidata
 *
 *   Portions of this software were developed by the Unidata Program at the
 *   University Corporation for Atmospheric Research.
 *
 *   Access and use of this software shall impose the following obligations
 *   and understandings on the user. The user is granted the right, without
 *   any fee or cost, to use, copy, modify, alter, enhance and distribute
 *   this software, and any derivative works thereof, and its supporting
 *   documentation for any purpose whatsoever, provided that this entire
 *   notice appears in all copies of the software, derivative works and
 *   supporting documentation.  Further, UCAR requests that the user credit
 *   UCAR/Unidata in any publications that result from the use of this
 *   software or in any product that includes this software. The names UCAR
 *   and/or Unidata, however, may not be used in any advertising or publicity
 *   to endorse or promote any products or commercial entity unless specific
 *   written permission is obtained from UCAR/Unidata. The user also
 *   understands that UCAR/Unidata is not obligated to provide the user with
 *   any support, consulting, training or assistance of any kind with regard
 *   to the use, operation and performance of this software nor to provide
 *   the user with any updates, revisions, new versions or "bug fixes."
 *
 *   THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
 *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *   DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
 *   INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 *   FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 *   NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 *   WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
 */

package ucar.atd.dorade;

import java.io.RandomAccessFile;
import java.util.Formatter;

class DoradeCSFD extends DoradeCELV {

  protected int nSegments;
  protected float rangeToFirstCell; // to center
  protected float[] segCellSpacing;
  protected short[] segNCells;

  public DoradeCSFD(RandomAccessFile file, boolean littleEndianData) throws DescriptorException {
    //
    // The CSFD descriptor:
    //	descriptor name			char[4]	= "CSFD"
    //	descriptor len			int	= 64
    //	number of segments (<= 8)	int
    //	distance to first cell, m	float
    //	segment cell spacing		float[8]
    //	cells in segment		short[8]
    //
    byte[] data = readDescriptor(file, littleEndianData, "CSFD");

    //
    // unpack
    //
    nSegments = grabInt(data, 8);
    rangeToFirstCell = grabFloat(data, 12);

    segCellSpacing = new float[nSegments];
    segNCells = new short[nSegments];

    nCells = 0;

    for (int seg = 0; seg < nSegments; seg++) {
      segCellSpacing[seg] = grabFloat(data, 16 + 4 * seg);
      segNCells[seg] = grabShort(data, 48 + 2 * seg);
      nCells += segNCells[seg];
    }

    ranges = new float[nCells];
    int cell = 0;
    float endOfPrevCell = 0.0f;

    for (int seg = 0; seg < nSegments; seg++) {
      for (int segCell = 0; segCell < segNCells[seg]; segCell++) {
        if (cell == 0) {
          ranges[cell++] = rangeToFirstCell;
          endOfPrevCell = rangeToFirstCell + segCellSpacing[seg] / 2;
        } else {
          ranges[cell++] = endOfPrevCell + segCellSpacing[seg] / 2;
          endOfPrevCell += segCellSpacing[seg];
        }
      }
    }

    //
    // debugging output
    //
    if (verbose)
      System.out.println(this);
  }

  public String toString() {
    Formatter f = new Formatter();
    f.format("CSFD  number of segments= %d", nSegments);
    for (int seg = 0; seg < nSegments; seg++) {
      f.format("  segment=%d # of cells=%d cell spacing=%f%n", seg, segNCells[seg], segCellSpacing[seg]);
    }
    return f.toString();
  }
}