This file is indexed.

/usr/include/dcmtk/dcmimgle/displint.h is in libdcmtk2-dev 3.6.0-15.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
/*
 *
 *  Copyright (C) 1996-2010, OFFIS e.V.
 *  All rights reserved.  See COPYRIGHT file for details.
 *
 *  This software and supporting documentation were developed by
 *
 *    OFFIS e.V.
 *    R&D Division Health
 *    Escherweg 2
 *    D-26121 Oldenburg, Germany
 *
 *
 *  Module:  dcmimgle
 *
 *  Author:  Joerg Riesmeier
 *
 *  Purpose: DiCubicSpline Function/Interpolation (Header/Implementation)
 *
 *  Last Update:      $Author: joergr $
 *  Update Date:      $Date: 2010-10-14 13:16:27 $
 *  CVS/RCS Revision: $Revision: 1.21 $
 *  Status:           $State: Exp $
 *
 *  CVS/RCS Log at end of file
 *
 */


#ifndef DISPLINT_H
#define DISPLINT_H

#include "dcmtk/config/osconfig.h"
#include "dcmtk/ofstd/ofcast.h"

#define INCLUDE_CSTDDEF               /* For NULL */
#include "dcmtk/ofstd/ofstdinc.h"


/*--------------------*
 *  macro definition  *
 *--------------------*/

// SunCC 4.x does not support default values for template types :-/
#define T3_ double


/*------------------*
 *  template class  *
 *------------------*/

/** Template class for cubic spline interpolation
 */
template <class T1, class T2 /*, class T3 = double*/>
class DiCubicSpline
{

 public:

    /** calculate spline function for given points.
     *  T1  = type of x coordinates
     *  T2  = type of y coordinates
     *  T3_ = type of y coordinates of the spline function
     *
     ** @param  x    array with x coordinates of given points
     *  @param  y    array with y coordinates of given points
     *  @param  n    number of entries in array (= points)
     *  @param  y2   array used to store the resulting spline function (used for CubicSplineInterpolation)
     *  @param  yp1  first derivative of the interpolating function at point 1
     *  @param  ypn  first derivative of the interpolating function at point n
     *
     ** @return true if successful, false otherwise
     */
    static int Function(const T1 *x,
                        const T2 *y,
                        const unsigned int n,
                        T3_ *y2,
                        const T3_ yp1 = 1.0e30,
                        const T3_ ypn = 1.0e30)
    {
        if ((x != NULL) && (y != NULL) && (n > 0) && (y2 != NULL))
        {
            T3_ *u = new T3_[n];                            // temporary vector
            if (u != NULL)
            {
                register unsigned int i;
                T3_ p, qn, sig, un;
                if (yp1 > 0.99e30)                          // ignore value for first derivative at point 1
                    y2[0] = u[0] = 0.0;
                else
                {
                    y2[0] = -0.5;
                    u[0] = (3.0 / (OFstatic_cast(T3_, x[1]) - OFstatic_cast(T3_, x[0]))) *
                           ((OFstatic_cast(T3_, y[1]) - OFstatic_cast(T3_, y[0])) /
                           (OFstatic_cast(T3_, x[1]) - OFstatic_cast(T3_, x[0])) - yp1);
                }
                for (i = 1; i < n - 1; ++i)
                {
                    sig = (OFstatic_cast(T3_, x[i]) - OFstatic_cast(T3_, x[i - 1])) /
                          (OFstatic_cast(T3_, x[i + 1]) - OFstatic_cast(T3_, x[i - 1]));
                    p = sig * y2[i - 1] + 2.0;
                    y2[i] = (sig - 1.0) / p;
                    u[i] = (OFstatic_cast(T3_, y[i + 1]) - OFstatic_cast(T3_, y[i])) /
                           (OFstatic_cast(T3_, x[i + 1]) - OFstatic_cast(T3_, x[i])) -
                           (OFstatic_cast(T3_, y[i]) - OFstatic_cast(T3_, y[i - 1])) /
                           (OFstatic_cast(T3_, x[i]) - OFstatic_cast(T3_, x[i - 1]));
                    u[i] = (6.0 * u[i] / (OFstatic_cast(T3_, x[i + 1]) -
                            OFstatic_cast(T3_, x[i - 1])) - sig * u[i - 1]) / p;
                }
                if (ypn > 0.99e30)                          // ignore value for first derivative at point 1
                    qn = un = 0.0;
                else
                {
                    qn = 0.5;
                    un = (3.0 / (OFstatic_cast(T3_, x[n - 1]) - OFstatic_cast(T3_, x[n - 2]))) *
                         (ypn - (OFstatic_cast(T3_, y[n - 1]) - OFstatic_cast(T3_, y[n - 2])) /
                         (OFstatic_cast(T3_, x[n - 1]) - OFstatic_cast(T3_, x[n - 2])));
                }
                y2[n - 1] = (un - qn * u[n - 2]) / (qn * y2[n - 2] + 1.0);
                for (i = n - 1; i > 0; --i)
                    y2[i - 1] = y2[i - 1] * y2[i] + u[i - 1];
                delete[] u;
                return 1;
            }
        }
        return 0;
    }


    /** perform cubic spline interpolation for given points.
     *  T1  = type of x coordinates
     *  T2  = type of y coordinates
     *  T3_ = type of y coordinates of the spline function
     *
     ** @param  xa   array with x coordinates of given points
     *  @param  ya   array with y coordinates of given points
     *  @param  y2a  array used to store the resulting spline function (calculated by CubicSplineFunction)
     *  @param  na   number of entries in above arrays (xa, ya and y2a)
     *  @param  x    array with x coordinates of points to be interpolated
     *  @param  y    array used to store interpolated values
     *  @param  n    number of entries in above array (x and y)
     *
     ** @return true if successful, false otherwise
     */
    static int Interpolation(const T1 *xa,
                             const T2 *ya,
                             const T3_ *y2a,
                             const unsigned int na,
                             const T1 *x,
                             T2 *y,
                             const unsigned int n)
    {
        if ((xa != NULL) && (ya != NULL) && (y2a != NULL) && (na > 0) && (x != NULL) && (y != NULL) && (n > 0))
        {
            register unsigned int k, i;
            register unsigned int klo = 0;
            register unsigned int khi = na - 1;
            T3_ h, b, a;
            for (i = 0; i < n; ++i)
            {
                if ((xa[klo] > x[i]) || (xa[khi] < x[i]))       // optimization
                {
                    klo = 0;
                    khi = na - 1;
                }
                while (khi - klo > 1)                           // search right place in the table, if necessary
                {
                    k = (khi + klo) >> 1;
                    if (xa[k] > x[i])
                        khi = k;
                    else
                        klo = k;
                }
                if (xa[khi] == x[i])                            // optimization: use known values
                    y[i] = ya[khi];
                else
                {
                    h = OFstatic_cast(T3_, xa[khi]) - OFstatic_cast(T3_, xa[klo]);
                    if (h == 0.0)                               // bad xa input, values must be distinct !
                        return 0;
                    a = (OFstatic_cast(T3_, xa[khi]) - OFstatic_cast(T3_, x[i])) / h;
                    b = (OFstatic_cast(T3_, x[i]) - OFstatic_cast(T3_, xa[klo])) / h;
                    y[i] = OFstatic_cast(T2, a * OFstatic_cast(T3_, ya[klo]) + b * OFstatic_cast(T3_, ya[khi]) +
                           ((a * a * a - a) * y2a[klo] + (b * b * b - b) * y2a[khi]) * (h * h) / 6.0);
                }
            }
            return 1;
        }
        return 0;
    }
};


#endif


/*
 *
 * CVS/RCS Log:
 * $Log: displint.h,v $
 * Revision 1.21  2010-10-14 13:16:27  joergr
 * Updated copyright header. Added reference to COPYRIGHT file.
 *
 * Revision 1.20  2010-03-01 09:08:47  uli
 * Removed some unnecessary include directives in the headers.
 *
 * Revision 1.19  2005-12-08 16:48:10  meichel
 * Changed include path schema for all DCMTK header files
 *
 * Revision 1.18  2003/12/23 15:53:22  joergr
 * Replaced post-increment/decrement operators by pre-increment/decrement
 * operators where appropriate (e.g. 'i++' by '++i').
 *
 * Revision 1.17  2003/12/08 19:20:47  joergr
 * Adapted type casts to new-style typecast operators defined in ofcast.h.
 * Removed leading underscore characters from preprocessor symbols (reserved
 * symbols). Updated copyright header.
 *
 * Revision 1.16  2002/07/18 12:30:59  joergr
 * Removed unused code.
 *
 * Revision 1.15  2001/06/01 15:49:51  meichel
 * Updated copyright header
 *
 * Revision 1.14  2000/03/08 16:24:24  meichel
 * Updated copyright header.
 *
 * Revision 1.13  2000/02/02 14:33:54  joergr
 * Replaced 'delete' statements by 'delete[]' for objects created with 'new[]'.
 *
 * Revision 1.12  1999/10/21 08:29:42  joergr
 * Renamed template type definition from 'T3' to 'T3_' to avoid naming
 * conflicts.
 *
 * Revision 1.11  1999/10/20 18:38:50  joergr
 * Eliminated default values for template types since this features is not
 * supported by SunCC 4.x (temporarily introduced '#define' instead).
 *
 * Revision 1.10  1999/10/15 09:38:31  joergr
 * Fixed typos.
 *
 * Revision 1.9  1999/10/14 19:05:17  joergr
 * Fixed typo.
 *
 * Revision 1.8  1999/10/01 13:25:35  joergr
 * Enhanced template class for cubic spline interpolation to support
 * non-floating point classes/types as y-coordinates.
 *
 * Revision 1.7  1999/07/23 14:11:25  joergr
 * Added preliminary support for 2D bi-cubic spline interpolation (currently
 * not used).
 *
 * Revision 1.6  1999/05/03 11:09:31  joergr
 * Minor code purifications to keep Sun CC 2.0.1 quiet.
 *
 * Revision 1.5  1999/04/29 13:49:08  joergr
 * Renamed class CubicSpline to DiCubicSpline.
 *
 * Revision 1.4  1999/03/24 17:20:26  joergr
 * Added/Modified comments and formatting.
 *
 * Revision 1.3  1999/03/22 08:52:43  joergr
 * Added/Changed comments.
 *
 * Revision 1.2  1999/02/25 16:17:16  joergr
 * Initialize local variables to avoid compiler warnings (reported by gcc
 * 2.7.2.1 on Linux).
 *
 * Revision 1.1  1999/02/11 16:36:29  joergr
 * Renamed file to indicate the use of templates.
 *
 * Revision 1.2  1999/02/09 14:21:54  meichel
 * Removed default parameters from template functions, required for Sun CC 4.2
 *
 * Revision 1.1  1999/02/04 17:59:23  joergr
 * Added support for calibration according to Barten transformation (incl.
 * a DISPLAY file describing the monitor characteristic).
 *
 *
 */